The choice between a continuous rotary system and an intermittent rotary system is not only about production speed. It directly impacts line design, mechanical complexity, the number of possible formats, changeover times, machine footprint, and filling stability.

In a filling line, this choice must take several criteria into account: target production rate, number of formats to handle, product type, required precision, and space constraints.

In other words, a continuous rotary system is not automatically better simply because it runs faster. Likewise, an intermittent rotary system is not only a low-speed solution. Each architecture responds to a different industrial logic.

How does a continuous rotary system work?

On a continuous rotary filling machine, containers remain in constant motion. The machine does not stop at each station: filling, capping, or dosing operations synchronize with the movement of the container.

This architecture generally uses an infeed star wheel to handle incoming containers and an outfeed star wheel to discharge them. As a result, tooling must follow the carousel movement and operate while the container keeps moving.

In practice, this approach significantly reduces downtime. Therefore, continuous rotary systems become relevant when production rate is the main objective, especially for standardized production.

When does a continuous rotary system become relevant?

A continuous rotary system becomes particularly relevant when a manufacturer runs a single format, or at most two similar formats. In this case, the machine can be optimized for fast and repetitive production.

This architecture can achieve high production rates, reaching up to approximately 200 cycles per minute, depending on the product, format, dosing system, and integrated stations.

However, the more formats a line handles, the more complex the machine becomes to adjust. Indeed, continuous operation requires precise synchronization between movements, tooling, and containers.

What are the limitations of a continuous rotary system?

The main advantage of a continuous rotary system remains its speed. However, this performance comes with greater technical complexity.

A continuous rotary system generally requires more servo motors, since multiple movements must synchronize in real time. As a result, the machine may become more expensive, more complex to adjust, and less flexible during format changes.

For this reason, this technology is usually better suited to long, repetitive, and highly standardized production runs than to workshops frequently changing products or containers.

How does an intermittent rotary system work?

On an intermittent rotary filling machine, also called an indexed rotary machine, containers move step by step. The machine positions the container at a station, stops, performs the operation, and then indexes to the next station.

This intermittent operation often simplifies machine design. Since the container remains stationary during the operation, filling, capping, or dosing stations work under stable conditions.

In practice, this architecture is particularly suitable for production environments requiring flexibility, fast format changes, or a compact machine footprint.

When does an intermittent rotary system become relevant?

An intermittent rotary system becomes relevant when manufacturers need to manage multiple formats, multiple products, or shorter production runs.

Its production rate typically reaches around 30 to 40 cycles per minute, depending on the application. However, this lower speed comes with a significant advantage: the machine remains more compact and mechanically simpler.

In addition, because it often contains fewer parts than a continuous rotary system, it simplifies adjustments and format changes. This becomes a major advantage for manufacturers prioritizing versatility over maximum throughput.

Why is an intermittent rotary system often more flexible?

An intermittent rotary system offers greater flexibility because it relies on a simpler mechanical logic. Containers stop at each station, leaving more room to adjust filling or capping operations.

This architecture also makes it easier to integrate different products or formats, especially when containers do not share exactly the same dimensions.

Finally, the compactness of an intermittent rotary system represents an important advantage when workshop space is limited.

What is the difference between continuous and intermittent rotary filling?

1. Production rate

The continuous rotary system achieves the highest production rates because containers remain in constant motion. It can reach up to approximately 200 cycles per minute in suitable applications.

The intermittent rotary system reaches more moderate production rates, around 30 to 40 cycles per minute. However, it compensates for this limitation through greater simplicity and flexibility.

2. Format flexibility

The continuous rotary system is better suited to single-format production or a maximum of two formats. Beyond that, adjustments become more complex because the machine must synchronize multiple movements.

The intermittent rotary system handles format changes more easily. Thanks to a simpler architecture and fewer parts, interventions are generally faster.

3. Machine footprint

The intermittent rotary system often provides an advantage in terms of footprint. Its more compact design makes integration easier in workshops where space is limited.

The continuous rotary system, by contrast, requires a more complete architecture, particularly with an infeed star wheel, an outfeed star wheel, and additional motorization.

4. Mechanical complexity

The continuous rotary system involves more synchronization. It generally requires more servo motors and more dynamic adjustments.

The intermittent rotary system remains simpler to operate. Since operations take place while the container is stationary, the mechanics can be more straightforward and easier to adjust.

5. Production type

The continuous rotary system is better suited to large production runs and repetitive manufacturing, where throughput is the main priority.

The intermittent rotary system is more appropriate for environments prioritizing versatility, compactness, and fast format changes.

Continuous vs intermittent rotary filling: quick comparison

When should you choose a continuous rotary system?

A continuous rotary system should be preferred when throughput is the main priority and production remains highly standardized.

This architecture becomes particularly relevant when manufacturers work with a single format or up to two formats, combined with high volumes and limited changeovers.

It is therefore ideal for filling lines designed to produce quickly, continuously, and with a high level of repeatability.

When should you choose an intermittent rotary system?

An intermittent rotary system should be preferred when flexibility outweighs maximum throughput.

This architecture is especially suitable for manufacturers frequently changing formats, handling multiple products, or working with limited machine space.

Intermittent rotary systems also become relevant when mechanical simplicity, compactness, and fast format changes represent key requirements.

Continuous or intermittent rotary for liquids?

For liquid products, both architectures may be suitable. The choice mainly depends on throughput requirements, product behavior, and the number of formats.

A stable, free-flowing liquid packaged in a standard container may suit a continuous rotary logic. By contrast, a more complex, foamy, viscous, or multi-format product may justify an intermittent approach.

In such cases, the machine must provide sufficient filling stability, especially when the product requires a specific nozzle or a more controlled filling time.

Continuous or intermittent rotary for powders?

For powders, intermittent rotary systems often provide a particular advantage because dosing requires stability.

A vertical auger filler must often maintain good repeatability, limit fines, and ensure clean filling. Stopping the container at each station therefore helps improve dosing consistency and filling control.

However, the final choice always depends on the product, production rate, packaging format, and dosing technology used. In some projects, the choice between volumetric and gravimetric dosing also influences line design.

Why are trials still essential?

Even with a strong initial orientation, the choice between continuous and intermittent rotary filling must be validated using the real product and final packaging.

Trials make it possible to verify achievable throughput, dosing accuracy, filling stability, line cleanliness, and container behavior during the cycle.

They also confirm whether the expected level of flexibility remains compatible with the selected machine architecture.

To secure your project, run filling trials with your product and packaging.

Conclusion

The choice between continuous rotary filling and intermittent rotary filling ultimately comes down to a clear trade-off: maximum throughput or industrial flexibility.

Continuous rotary systems achieve the highest production rates, up to approximately 200 cycles per minute, but they are best suited to standardized production using one or two formats.

Intermittent rotary systems typically reach around 30 to 40 cycles per minute, while offering a more compact, simpler machine with faster format changes.

In all cases, the right choice depends on the product, packaging format, target throughput, and required level of flexibility.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

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Creatine Powder: the most common format

Creatine powder remains the most widely recognized format on the market today. It is extensively used in the sports nutrition industry, especially for products designed for athletes seeking a rapidly available energy source during short, intense efforts.

Like many industrial powders, creatine can behave differently depending on its formulation, particle size distribution, bulk density, level of dustiness, or sensitivity to humidity. Some powders flow very easily, while others become more cohesive or more sensitive to caking.

Although powder remains the dominant format, creatine is now available in many different presentations.

On the market, creatine is primarily found as creatine monohydrate, sometimes in micronized form (capsules), as capsules, tablets, effervescent or non-effervescent, as well as gummies.

However, these formats follow a different industrial logic. Here, the objective is no longer to dose a free-flowing powder but to count individual units.

In this context, capsules, tablets, and gummies are generally handled using a counting machine, often fed by a vibrating system. This distinction is essential: a vertical auger filler doses a mass of product, whereas a counting machine counts a precise number of units.

This variability directly influences the choice of filling technology and machine settings, as explained in our technical powder filling glossary.

Pure creatine or formulated blends: sometimes very different behaviors

Not all creatine products behave the same way during industrial filling.

Indeed, some dietary supplements do not contain creatine alone. Depending on the manufacturer, formulations may be enriched with vitamins, minerals, proteins, taurine, flavorings, or sweeteners.

However, even a small formulation change can significantly alter product behavior during filling. A powder may become dustier, stickier, or less consistent in flowability.

In other words, two commercial creatine products may require different machine settings or tooling, even if they appear commercially similar.

In addition, some manufacturers highlight recognized quality labels such as Creapure®, a creatine monohydrate produced with a high level of purity and traceability. From a filling perspective, however, it is primarily the physical characteristics of the product that determine the most suitable technical solution.

Which filling machine for creatine?

Objective: clean and accurate filling

For powdered creatine, the objective is to achieve filling that is accurate, repeatable, and clean.

However, some technologies have limitations. For example, a vibratory feeder may generate more fines when handling dusty powders. Meanwhile, horizontal dosing systems are generally better suited to high-throughput or process applications.

In most cases, the vertical auger filler remains the most suitable technology for filling powdered creatine.

Why the vertical auger is often the right technology

The vertical auger offers particular advantages for this family of products, as it enables highly accurate dosing while maintaining a strong level of cleanliness.

It is especially suitable for the small doses commonly found in sports nutrition and can handle both simple powders and more complex formulations.

On the other hand, when dealing with capsules, tablets, or other unit-based formats, a counting machine generally becomes the more relevant option, precisely because it counts units rather than dosing a target weight.

Filling technology comparison

How should creatine be fed into the machine?

As with many powders, maintaining a constant product level in the hopper helps stabilize dosing performance and maximize accuracy.

The product feeding method then depends on the plant layout. When the product arrives at the same level as the filling machine, a pneumatic conveying system may be suitable. Conversely, a gravity-fed system may be preferred when the product comes from an upper floor.

Creatine filling trials and validation: what should you check?

To secure a creatine filling project, the most reliable approach remains validation under real production conditions.

Trials make it possible to assess dosing accuracy, repeatability, line speed, as well as filling cleanliness and the level of dust or fines generated.

They also help evaluate ease of disassembly for cleaning and determine the number of tooling configurations actually required to cover all product references.

In more demanding environments, especially projects close to the pharmaceutical industry or carried out in controlled environments, IQ/OQ/PQ qualifications and traceability of product-contact materials may also become key requirements.

For this reason, run filling trials using your own creatine product in your final packaging.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

Key Takeaways

• The vertical auger generally remains the best technology for powdered creatine.
• Capsules, tablets, and gummies are typically handled using a counting machine.
• The same creatine may behave differently depending on its formulation or micronization level.
• Real production trials remain essential before finalizing a technical choice.

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Dust is not just a visual issue. It has a direct impact on the performance of the filling line.

In the context of industrial powder filling, it can lead to:

• product losses
• machine fouling
• reduced cleanliness in the production area
• sealing defects on packaging
• additional cleaning constraints

In some cases, the presence of fines can also affect dosing consistency.

Where does dust come from during filling?

Dust generation primarily depends on the product.

Some powders, such as bicarbonate or certain spices, can be highly powdery. During filling, they release fine particles that disperse into the environment.

Particle size plays a key role. The finer the particles, the higher the risk of dispersion.

Product behavior can also vary:

• depending on the supplier
• from one batch to another
• depending on the product level in the hopper

The same powder can therefore behave differently depending on production conditions, as observed in other dry product applications.

Which technology should be used to reduce dust?

Vibratory feeder: a limited solution

The vibratory feeder works by vibrating the product. This movement lifts the powder and promotes the dispersion of fines.

It is therefore less suitable for powdery products, as it generates more dust and makes it harder to control.

Vertical auger: a more suitable solution

The vertical auger dosing system allows better control of the product during filling.

This technology limits projection effects and helps to:

• reduce the dispersion of fines
• improve filling cleanliness
• ensure more consistent dosing

It is particularly suited to powdery products, such as those encountered in collagen filling or bicarbonate applications.

How to effectively reduce dust?

Integrate a dust extraction system

The most direct solution is to equip the machine with suction nozzles connected to a dust extraction system.

These devices capture fine particles during filling and keep filling heads and the packaging area clean.

Adapt the machine design

The overall machine design plays a key role.

A well-designed filling machine helps to:

• limit dispersion zones
• control product flow
• reduce product losses

Dosing technology and dust extraction must be designed together.

Understand product behavior

Reducing dust also requires a clear understanding of the product.

It is important to analyze:

• particle size distribution
• powdery behavior (dustiness)
• batch-to-batch variability

A very fine or unstable powder will require a different approach compared to a more homogeneous product.

The role of product feeding

The way the product is fed into the machine directly impacts dust generation.

Poor feeding conditions can:

• increase the dispersion of fines
• create flow variations
• reduce dosing stability

On the other hand, a consistent feed helps stabilize product behavior and limit emissions.

Why are trials essential?

Even with a good understanding of the product, its behavior cannot be fully predicted.

Trials make it possible to verify:

• the machine’s ability to handle powdery products
• the efficiency of the dust extraction system
• filling cleanliness
• dosing stability

To secure your project, it is recommended to carry out trials with your product under real conditions.

Conclusion

Reducing dust during powder filling relies on three main factors: the product, the dosing technology, and the machine design.

Powdery products require particular attention. In this context, vertical auger dosing combined with a dust extraction system is an effective solution to limit fine particle emissions and ensure clean, controlled filling.

In all cases, validation through trials remains a key step to secure the process.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

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Beans, ground coffee or instant coffee

Coffee can be packaged in different forms. As whole beans, coffee behaves like a granular product, while ground coffee behaves like a more or less fine powder. Instant coffee, on the other hand, is similar to a light powder with specific structural characteristics.

There is also a wide diversity of coffees. Dozens of bean varieties exist worldwide. Blends, origins and roasting levels influence not only taste but also product behavior during filling.

The specific case of agglomerated coffee

Agglomerated coffee, often used in certain instant coffee preparations, behaves differently during filling.

Unlike ground coffee, it behaves more like a granular product. However, it remains mechanically very fragile. The granules can easily break during transfer, feeding, or dosing.

Particle size as a key factor in filling

The particle size distribution of coffee is a key parameter. It varies depending on the preparation method and directly affects product flow.

A very fine grind, used for espresso or Turkish coffee, corresponds to particles smaller than 1 mm. A medium grind, suitable for filter coffee, is generally below 1.5 mm. Coarser grinds, used for French press or similar methods, involve larger particles.

These variations influence bulk density, flowability and dosing stability, which are also key parameters in dry product applications.

The role of grinding in product behavior

Coffee grinding does not only affect taste; it also impacts industrial product behavior.

By increasing the surface area in contact with water, grinding enables the extraction of aromatic compounds. It also modifies powder structure, cohesion and flowability.

These phenomena are comparable to those observed in other technical powders.

Ground coffee behavior

Ground coffee is a powder that generally flows easily. It behaves similarly to free-flowing powders.

However, as the hopper empties, the product can become more cohesive, which may lead to flow variations. This type of behavior is also observed in other industrial products, particularly in chicory filling applications.

Sensitivity to the environment

Ground coffee is highly sensitive to its environment. Exposure to air, light, heat and humidity can quickly degrade its properties and alter its aromas.

These constraints must be considered in the design of the filling line, particularly regarding materials and product interfaces, as explained in the technical specificities of filling machines.

Blended coffee

In the case of blends, such as Arabica and Robusta, segregation phenomena may occur. This can lead to variations in product composition during filling.

This issue is also encountered with other powders and requires an adapted process and dosing system design.

What packaging is used for coffee?

Coffee is packaged in a wide range of formats depending on usage and market requirements. These include bags, doypacks, jars and packaging under protective atmosphere.

The choice of packaging directly impacts the line configuration, particularly in terms of production rate and automation, as detailed in the selection of filling machines.

Which filling machine should be used for coffee?

The choice of dosing technology

The choice of technology depends directly on the form of the coffee and its behavior.

Ground coffee is typically processed using a vertical auger filler, which efficiently handles powders while ensuring a high level of dosing accuracy.

Coffee beans can be dosed using technologies adapted to granular products, while instant coffee behaves more like a powder.

Flow stability and dosing consistency

Even though ground coffee flows easily, its behavior can change depending on the product level in the hopper.

Maintaining a constant level in the hopper is a key factor in stabilizing dosing, as is also the case in protein powder filling applications.

Control of the filling environment

Coffee filling requires particular attention to the environment. It is important to limit fine particle dispersion while protecting the product from external factors.

These constraints are common to many powders and are integrated into the design of the line.

Why the vertical auger is often the right technology

Vertical auger dosing allows powders to be filled with precision, cleanliness and consistency. It adapts to different coffee particle sizes and helps reduce variations related to product behavior.

This technology is widely used for industrial powder filling.

Comparison of constraints and filling solutions

Product feeding

Coffee feeding must be stable to ensure consistent dosing. Variations in hopper level can lead to dosing deviations.

Maintaining a constant level and controlled feeding helps stabilize the operation of the coffee filling machine.

Testing and validation of coffee filling machines: what to check

Validation under real conditions is essential to secure a coffee filling project.

It allows verification of dosing accuracy, repeatability and product behavior. It also helps assess the impact of particle size and blend stability.

To do so, carry out tests with your coffee product in your packaging.

Key takeaways

Coffee is a complex product to handle due to the diversity of its forms, its particle size variability and its sensitivity to the environment.

Grinding plays a key role both in the final product quality and in its behavior during filling.

In this context, vertical auger dosing is generally the most suitable solution to ensure precise, clean and consistent filling.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

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The choice between a vertical auger and a vibratory feeder is not only about the filling machine. It also determines the level of accuracy, line cleanliness, and the ability to handle different powders.

To choose the right solution, several criteria must be considered together:

• powder behavior
• the dose to be filled
• the target production rate
• the expected accuracy level
• the production environment
• the type of packaging

How does a vibratory feeder work for powder filling?

The vibratory feeder moves the powder forward using a vibrating trough. This solution has the advantage of being simple and cost-effective: the number of dosing tools is limited. However, it lifts the product by vibration during dosing. This movement generates dust and makes fines harder to control.

With the same number of heads, the process can also be slower than other technologies. It works well with pieces or solid items. It becomes less reliable with powders, especially heterogeneous powders, because vibration separates the components. The vibratory feeder works only in gravimetric dosing. Manufacturers have largely limited the production of volumetric vibratory feeders for powder dosing because of their lack of accuracy.

This technology is better suited to rigid or less fragile products. It can also be used for unit-counting applications, such as certain candies, screws, nails, capsules, or tablets.

How does a vertical auger work for powder filling?

The vertical auger uses an Archimedes screw placed inside a funnel. The screw drives the powder toward the packaging with a more controlled flow.

This technology can operate in volumetric or gravimetric mode. It therefore adapts to different objectives depending on the dose, the target accuracy, and the product behavior.

The vertical auger is suitable for a wide range of powders. It allows better dust control, including with dusty powders such as protein powder, collagen, or chicory. It can also handle homogeneous, heterogeneous, fragile, sticky, hygroscopic, or caking powders.

What is the difference between a vertical auger and a vibratory feeder for powder filling?

1. Dosing cleanliness

The vibratory feeder lifts the powder. It therefore generates fines and dust more easily. This degrades the cleanliness of the filling area. Dust extraction systems used to limit fines can generate product losses that may become a blocking issue with dusty powders.

The vertical auger channels the product more effectively. It enables cleaner dosing. This advantage becomes essential when the objective is to reduce losses, preserve a sealing area, or maintain a cleaner environment.

2. Accuracy

The vibratory feeder offers less consistency with complex powders. It quickly reaches its limits when a fine and repeatable dose is required.

The vertical auger provides better accuracy control, depending on its geometry and the product properties. In volumetric mode, it is often well suited to doses below 1 kg, provided that a constant level is maintained in the hopper. In gravimetric mode, it can reach the accuracy of the scale division.

3. Production rate

For powders, the vibratory feeder remains relatively slow with a single head. To reach medium or high production rates, additional feeders must be added.

The vertical auger more easily combines speed and accuracy. It better meets projects requiring sustained production without compromising dosing quality. In practice, one vertical auger dosing head can reach 150 cpm with an agglomerating powder, whereas 4 vibratory feeders would be required for the same project.

4. Product integrity

For hard solid products, the vibratory feeder is effective despite the tapping effect. However, this agitation can degrade certain powders, generate more fines, or increase caking depending on the case.

The vertical auger is gentler on the product during dosing. It offers a better compromise between accuracy, speed, and material preservation. Large pieces, for example over 20 mm, are more difficult to dose with a vertical auger.

5. Heterogeneous powders

The vibratory feeder is poorly suited to heterogeneous powders. Vibration can separate the components and make filling more random.

The vertical auger better controls product transfer into the packaging. It reduces segregation effects.

Why does the vertical auger require more product knowledge?

The vertical auger does not work as a universal dosing system. To dose properly, you need a good understanding of the product’s flow behavior.

Several parameters influence tooling selection:

• bulk density
• density variability
• particle size distribution
• dustiness
• hygroscopicity
• the physical and chemical characteristics of the powder

The production environment also plays a major role. A moisture-sensitive powder does not behave the same way depending on the workshop atmosphere. At 60% humidity, the bulk density of a powder may vary, for example, from 0.48 to 0.6. This variation changes product flow, filling speed, and achievable accuracy.

Before finalizing the tooling, the powder must therefore be characterized under its real operating conditions.

When can a vibratory feeder still be relevant?

It can be relevant when the project is closer to counting than powder dosing, for example for capsules or tablets.

When is the vertical auger the best choice?

The vertical auger often becomes the best choice when a powder needs to be filled in a way that is:

• clean
• accurate
• repeatable
• fast
• controlled

It is particularly suitable for powders that are:

• dusty
• sticky
• hygroscopic
• caking
• heterogeneous
• fragile
• microgranular

It is also the preferred option when the project requires a high level of speed, accuracy, and cleanability.

Vertical auger vs vibratory feeder: quick comparison

Why are trials still essential?

Even with a strong initial orientation, the choice should not be made without testing. Trials make it possible to verify:

• accuracy
• repeatability
• production rate
• dosing cleanliness
• the actual behavior of the powder
• ease of cleaning
• the fit between the powder, the packaging, and the tooling

Trials on a powder filling machine also validate the product behavior in its real environment. Ask to take part in trials with your product and packaging.

Conclusion

To fill a powder, it is not enough to simply compare the vertical auger and the vibratory feeder. The starting point must always be the real product and its constraints.

The vibratory feeder can be suitable for more rigid products. However, it quickly shows its limits with fine, heterogeneous, or sensitive powders.

The vertical auger requires more product expertise and more precision when selecting the tooling. In return, it offers a more robust solution for achieving clean, accurate, and industrializable dosing.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

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Powders, microgranules, seeds, capsules, tablets

Dietary supplements come in a wide variety of forms. These include powdered products such as protein, collagen, creatine, maca or spirulina. Some supplements can also be offered in microgranule form, such as spirulina. Others are available as capsules or tablets. Lastly, some ingredients such as flax can be sold whole, for example as seeds to be ground before use, or already ground (as a powder). The physical form of the product has a direct impact on filling behavior and on the choice of technology.

The same product family, but very different behaviors

Even when they belong to the same commercial category, two dietary supplements can behave very differently during dosing. These differences may come from bulk density, particle size, flowability, dustiness, stickiness, sensitivity to humidity, or a tendency to cake. A powder may be free-flowing, prone to caking, dusty, electrostatic or hygroscopic, and these properties directly guide the choice of technology and tooling. A very concrete example: you may find collagen powder that is highly dusty, with a density of 0.38, and sticky, caking maca with a density of 0.61.

Single supplements vs formulated blends

Some dietary supplements are packaged on their own, while others are formulated as more complex blends. A protein powder may, for example, be combined with flavors, vitamins, sweeteners or other ingredients. Even a small change in the formulation can alter the product’s behavior during filling. A blend may become stickier, dustier, less stable, or more sensitive to flow variations.

What packaging formats are used for dietary supplements?

Dietary supplements in jars

Many dietary supplements are packaged in jars, especially powders and microgranules. This is a common format for protein, collagen, creatine, spirulina or maca. Doses can vary significantly depending on the product, the marketing promise and the intended use. Some jars may also build up static electricity before filling, which can affect the cleanliness of the dosing area and require appropriate treatment before filling.

Dietary supplements in pouches

Pouches are also common for powders and dry products. Flat-bottom pouches are frequently used, along with other formats depending on the target market. One key challenge is preventing product from entering the sealing area. The dosing tooling must therefore be designed to enter the package during filling in order to maintain a clean fill.

Dietary supplements in bags or large formats

Some dietary supplements or base ingredients may also be packaged in large formats, especially for B2B uses, professional distribution channels or intermediate stages. The approach then depends on the dose, the level of automation, the required accuracy and the organization of the line.

Capsules and tablets

Capsules and tablets follow a different logic. Here, the goal is no longer to dose a free-flowing powder but to count units. In practice, tablets are often handled upstream by a tablet press and then by a counter during packaging. Capsules are also often handled by a counter (vibratory chute), or in some cases by a dosing solution adapted to their presentation format. A counter counts units, whereas a vertical auger filler doses until a target weight is reached. This distinction is essential to properly define a project.

Which filling machine should you choose for dietary supplements?

Goal: clean and accurate dosing

For dietary supplements in powder or microgranule form, the objective remains to achieve precise, repeatable, and clean dosing. A vibratory feeder may generate a significant amount of fines when handling dusty powders. Horizontal dosing is mainly used for process applications or large-volume filling, such as bulk bags, which do not require the same level of precision and cleanliness as packaging ranging from a few grams to several tens of kilograms. A vertical auger dosing system accurately handles both powders and microgranules. This is why, in most cases, it remains the preferred technology for packaging dietary supplements in powder or microgranule form, as well as certain similar dry products such as seeds or ground ingredients.

Why the vertical auger is often the right technology

The vertical auger is especially relevant for this product family because it can handle a wide variety of dry dietary supplements using a true dosing logic by weight or volume, rather than counting. It is therefore suitable for powders such as protein, collagen, creatine, maca or spirulina, but also for other dry products when the goal is to dose a given mass of product rather than count units. By contrast, when dealing with capsules or tablets, a counter is generally more suitable precisely because it counts units.

Comparison of filling technologies

How to feed the product

Maintaining a constant product level in the hopper helps maximize dosing accuracy. Product feeding then depends on the layout of the workshop. If the product arrives at the same level as the filler, pneumatic transfer can be effective. If the product arrives from an upper floor, gravity feeding may be preferred.

Dietary supplement filler trials and validation: what you need to check

To secure a dietary supplement filling project, the most reliable approach remains validation under real conditions: ask to take part in tests with your dietary supplements in your packaging.

These tests make it possible to verify:

• dosing accuracy
• repeatability
• throughput
• fill cleanliness
• the level of dust or fines
• the simplicity and speed of disassembly for cleaning
• the number of dosing tools required for all your products

In more demanding environments, especially for projects related to the pharmaceutical industry or carried out in a controlled environment, the requirements to request are IQ/OQ/PQ qualifications and traceability of contact materials.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

Key takeaways

• The vertical auger is suitable for dietary supplements in powder, microgranule and grain form.
• The counter is used for dietary supplements in capsule form.
• Volumetric or gravimetric technology depends on throughput and accuracy targets.

FAQ – Dietary supplement filling machine

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• Abrasive
• Cohesive powder
• Sticky powder
• Corrosive powder
• Free-flowing powder
• Heterogeneous powder
• Homogeneous powder
• Hygroscopic powder
• Automatic weighing instrument (AWI)
• Legal metrology
• Gravimetric filling
• Dusty powder
• Volumetric filling

Abrasive powder

An abrasive powder is composed of hard particles capable of causing wear on mechanical components during handling and dosing operations.

Impact on powder filling

Abrasive powders progressively wear dosing tools, especially auger screws and contact parts. As wear increases (sharp edges, inconsistent screw pitch), dosing accuracy decreases due to variations in the delivered volume. This directly impacts filling precision, repeatability, and overall machine performance.

Recommended solution

Applying surface treatments (such as coatings or hardening processes) significantly improves wear resistance and extends tool lifespan. Another approach is to use harder materials for critical components, particularly dosing screws used in auger filling machines.

Cohesive (agglomerating) powder

A cohesive powder is a powder that naturally tends to form lumps or agglomerates due to inter-particle forces.

Impact on powder filling

A free-flowing (non-cohesive) powder flows continuously and evenly. In contrast, a cohesive powder flows in irregular lumps with variable mass. This variability creates inconsistent flow, leads to pulsation effects during dosing, and reduces filling accuracy and repeatability.

Recommended solution

Using agitators or stirring devices inside the hopper helps break agglomerates without damaging the product. This improves powder flowability, ensures a more consistent mass flow, and increases dosing accuracy in powder filling machines.

Typical industrial applications

Some dietary supplements, such as protein powders, are typically cohesive and prone to agglomeration.

Sticky powder

A sticky powder is a powder whose composition promotes adhesion to metal or polymer surfaces in processing and filling equipment.

Impact on powder filling

Sticky powders tend to adhere to dosing tools during operation. Over time, material builds up on the auger screw and contact surfaces. This gradual buildup reduces the effective volume of the screw, leading to dosing drift and reduced filling accuracy.

Recommended solution

Optimizing screw geometry (for example, flight angle and design) can reduce sensitivity to buildup. Another effective approach is applying surface treatments or coatings to limit adhesion and improve cleanability.

Typical industrial applications

Certain peptides are particularly sticky and prone to adhesion during powder filling operations.

Corrosive powder

A corrosive powder is a powder whose chemical composition can attack or degrade materials such as metals, seals, and polymers in contact with the product.

Impact on powder filling

Corrosive powders can damage dosing tools, hoppers, and machine frames, especially when fine particles spread onto surrounding structures. Corrosion gradually alters mechanical tolerances, may lead to dosing drift, and significantly reduces equipment lifespan.

Recommended solution

For product-contact parts, select chemically compatible materials such as technical polymers or specific coatings. It is also essential to minimize product retention zones and implement regular cleaning procedures to limit corrosion effects.

Typical industrial applications

Caustic soda and chlorine-based pool treatment products are highly corrosive powders.

Free-flowing powder

A free-flowing powder is a highly fluid powder that flows easily under the effect of gravity.

Impact on powder filling

At the end of the dosing cycle, flow inertia inside the auger combined with gravity can cause residual flow. This leads to powder dribbling, which may contaminate the filling area, dirty containers, and reduce dosing consistency.

Recommended solution

Optimizing the screw geometry (for example, flight angle) can significantly reduce residual flow. Another approach is to adjust the screw deceleration profile to limit product inertia at the end of the filling cycle.

Typical industrial applications

Printer toner is a highly free-flowing powder.

Heterogeneous powder

A heterogeneous powder is a blend in which components have different properties (density, particle size, particle shape, etc.) and may separate under the effect of vibrations or handling (segregation or de-mixing).

Impact on powder filling

De-mixing compromises the uniformity of the final product and may lead to regulatory non-compliance, particularly in pharmaceutical applications where content uniformity is critical.

Recommended solution

Avoid conveying systems that promote vibrations (such as certain vibratory feeders), as they accelerate segregation. Prefer vertical auger dosing combined with gravity feeding. Limiting drop heights during product transfer also helps reduce the risk of de-mixing.

Typical industrial applications

Pharmaceutical products are often composed of a bulk excipient and an active ingredient, making them sensitive to segregation.

Homogeneous powder

A homogeneous powder is a blend with a uniform composition throughout the entire batch.

Impact on powder filling

A homogeneous powder ensures consistent composition from one batch to another and facilitates high dosing repeatability and process control.

Hygroscopic powder

A hygroscopic powder is a powder that absorbs or retains moisture from the surrounding air.

Impact on powder filling

Depending on environmental conditions (temperature and humidity), the physical properties of the powder change. Moisture absorption alters bulk density and cohesion, which affects powder flow and reduces dosing repeatability.

Recommended solution

Operate in a humidity-controlled environment whenever possible. When humidity control is not feasible, prefer gravimetric dosing or volumetric systems with trend correction to compensate for variations in powder behavior.

Typical industrial applications

Many pharmaceutical products, as well as food powders such as chicory and various spices, are hygroscopic.

Automatic weighing instrument (AWI)

An IPFA is an automatic weighing instrument as defined by European regulations. It may take the form of a gravimetric filling machine (dosing unit) or a checkweigher.

Impact on powder filling

A gravimetric filling machine subject to legal metrology must undergo initial verification (for example, conformity assessment under Module D). This verification certifies that the equipment complies with regulatory requirements over a defined weighing range, including maximum permissible errors, accuracy, and dosing repeatability.

Limitations

The design and placing on the market of an IPFA require the manufacturer to obtain a EU type-examination certificate issued by a notified body (such as LNE in France). Equipment used under legal metrology must also undergo periodic inspections to ensure continued compliance.

Typical industrial applications

Prepackaged products intended for consumer sale and applications subject to legal metrology requirements.

Legal metrology

Legal metrology refers to the regulatory framework and procedures designed to ensure consumer protection and the accuracy of measurements used in commercial transactions.

Impact on powder filling

Operators involved in packaging must implement procedures and controls to ensure that the declared net weight on the packaging corresponds to the actual content of the prepackaged product.

Recommended solution

Manufacturers and packers can:

– Implement statistical net weight control using a non-automatic weighing instrument.

– Use a gravimetric filling machine compliant with legal metrology requirements (automatic weighing instrument).

– Integrate a checkweigher (automatic weighing instrument) for systematic in-line inspection.

Typical industrial applications

Prepackaged products intended for consumer sale.

Gravimetric filling

A gravimetric filling system uses a weighing device (load cell) to continuously measure the product weight and stops dosing once the target weight is reached.

Impact on powder filling

Gravimetric dosing provides high accuracy and compensates for variations in bulk density and powder flow behavior.

Limitations

Micro-dosing applications require load cells with very high resolution (for example 0.01 g). In such cases, environmental factors such as air movements or mechanical vibrations can affect weighing accuracy. A volumetric dosing system may therefore offer better stability.

Gravimetric dosing typically operates in two phases: a fast bulk filling phase followed by a slower fine dosing phase to reach the target weight with precision. As a result, it is generally slower than volumetric filling.

Typical industrial applications

Filling of dietary supplements, large-volume packaging, or applications subject to legal metrology requirements.

Dusty powder

A dusty powder is a powder that easily generates fine particles during handling or flow, which can become airborne.

Impact on powder filling

Fine particles can contaminate the packaging area, reduce packaging cleanliness, and create safety risks such as dust explosion hazards (ATEX), inhalation exposure, or cross-contamination. This may also lead to compliance issues in regulated industries.

Recommended solution

Avoid dosing systems that generate vibrations (such as vibratory feeders). Implement dust extraction or vacuum systems in the filling area. Reduce drop heights during product transfer and dosing. Limit agitator speed in the hopper, as excessive rotation can generate additional fines.

Typical industrial applications

Certain spices, such as cinnamon, as well as some dietary supplements like collagen, are particularly dusty.

Volumetric filling

A machine performs volumetric dosing when the target setpoint corresponds to a defined volume of product to be delivered.

Impact on powder filling

Volumetric dosing typically operates at a constant speed, allowing high throughput and high filling rates. It is particularly suitable for micro-dosing applications when the powder behavior remains stable.

Limitations

Dosing repeatability strongly depends on the stability of bulk density and powder flow. Variations in these properties can lead to dosing drift.

Using a post-dosing weighing system with trend correction helps compensate for these variations and improves overall accuracy.

Typical industrial applications

High-speed filling lines and micro-dosing applications in pharmaceutical or cosmetic industries.

To learn more about industrial powder filling, explore our complete guide to industrial powder filling, covering technologies, powder behavior, and key parameters for accurate and efficient dosing.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

Cet article Technical glossary of industrial powder filling est apparu en premier sur MOM PACKAGING.

Plant proteins vs animal proteins

A whey protein, a casein, and a plant protein (pea/rice/soy) do not behave the same way. Even with the same name, powders from two different suppliers can differ. These differences come from density, particle size distribution, and flow behavior.

In practice, a plain whey protein powder may have a density of 0.54, while a whey protein from the same supplier, vanilla flavored, can have a density of 0.42.

Proteins and blends

Proteins are often blended with other ingredients (flavors, vitamins, sweeteners, creatine, etc.). Sometimes a single additive is enough to make the powder stickier, dustier, or less stable. This is why dry protein formulations often have very different physical and chemical characteristics from one recipe to another.

Powder vs micro-granulated: what the form really changes

A micro-granulated protein flows more easily. It may be less dusty than a very fine powder. Conversely, a fine powder may offer other benefits but can create cleanliness constraints during dosing.

Which packaging formats are proteins packed in?

Proteins in jars

When proteins are packaged in jars, the dose typically ranges from 100 g to 2 kg. Jars are often plastic, rarely glass. Some jars can build up static electricity before filling; in that case, it is sensible to discharge the jar before filling the protein.

Proteins in pouches

Proteins are also found in pouches. Flat-bottom pouches represent a significant share of protein packaging. Doses range from 100 g to 1 kg. Avoid powder in the sealing area. To do so, the dosing tooling must enter the pouch during filling.

Proteins in bags

B2B protein suppliers sell large-volume formats, mostly bags in 20 kg and 25 kg sizes. Proteins are often less blended in these formats. The B2C customer may create blends to meet specific needs.

Which protein powder filling machine?

Protein characteristics

Protein products are typically supplied either as fine powders or micro-granules. In powder form, proteins can be more or less dusty. Proteins can be moderately to very sticky. Finally, some protein powders tend to form lumps, which can be several centimeters across.

Goal: clean and accurate dosing

Vibratory trough dosing generates a lot of fines, especially with dusty proteins.
Horizontal dosing is mainly used in process applications (big bags). For smaller doses, it will be very inaccurate.
Vertical auger dosing accurately doses both powder and micro-granules.
That is why it is the appropriate dosing technology for packaging proteins.

How to feed product

Keeping a constant product level in the hopper helps maximize dosing accuracy. For protein packaging, the choice of feeding technology depends on workshop organization. If proteins arrive at the same level as the doser, pneumatic conveying is effective. If proteins arrive from an upper floor, prefer gravity feeding.

Trials and validation for a protein powder filling machine: what you must check

To secure your protein filling project, the most reliable approach is validation under real conditions: request to take part in tests with your proteins in your packaging.

These tests allow you to verify:

• dosing accuracy

• repeatability (standard deviation)

• throughput

• dosing cleanliness (no “drip” at end of dosing)

• level of dust/fines

• simplicity and speed of disassembly for cleaning

MOM Packaging has manufactured protein powder filling machines for many customers.
Since 1927, MOM Packaging has been designing dosing and filling machines, with historical expertise in powder packaging.

Conclusion

To fill protein in dry form, whether dusty, sticky powder or micro-granules, vertical auger dosing is generally the most suitable technology. This should always be confirmed through trials. To achieve clean and accurate dosing of dry protein products, the machine builder will determine suitable dosing tooling.

Do you have other questions about powders? Read our complete guide to powder filling.

MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.

FAQ — Protein powder filling machine

Cet article Protein powder filling machine est apparu en premier sur MOM PACKAGING.

• Understand powder behavior

• Identify the appropriate dosing technology

• Understand constraints and specific requirements

• Validate choices through trials

Technical guides by powder type

• Collagen powder filling

• Spice filling

• Bicarbonate filling

• Protein powder filling

• Dry chlorinated products filling

1. Understanding powder behavior

Key powder characteristics

Before looking at technologies, start by characterizing the product—i.e., understanding the powder’s behavior:

• Free-flowing / highly flowable powder: flows easily, but bulk density can vary from one lot to another (e.g., printer toner, etc.).

• Cohesive / caking powder: forms arches, sticks, and can block gravity discharge (e.g., protein powder, milk powder, etc.).

• Dusty powder: generates fines that can reduce area cleanliness and contaminate sealing zones (e.g., certain spices like cinnamon, metal powders, some bicarbonates, etc.).

• Heterogeneous powder (blend): risk of segregation/demixing if the flow is not controlled (e.g., certain medicines, spice blends, etc.).

• Electrostatic powder: adheres to surfaces and can affect packaging cleanliness and filling stability (e.g., collagen, etc.).

• Hygroscopic powder: absorbs ambient moisture, which can change its behavior (e.g., chicory, etc.).

• Abrasive powder: wears product-contact parts faster; material selection and maintenance become key criteria (e.g., silica-based products, etc.).

• Corrosive powder: (e.g., dry chlorinated products, etc.).

Each of these characteristics plays a role in selecting the technology to integrate. That is exactly why MOM emphasizes the importance of knowing powder properties.

Parameters targeted during powder characterization

• Bulk density (and lot-to-lot variability)

• Particle size distribution

• Physical properties (e.g., dustiness) and chemical properties (e.g., hygroscopicity)

This information already strongly guides both the technology choice and the definition of tooling for industrial powder filling.

2. Suitable dosing technologies

Main dosing technologies

There are several major solution families, each with advantages and limitations: dosing by vibratory trough, flap valve, vertical auger, or horizontal auger. In practice, performance depends as much on the technology as on tooling design and product feeding organization.

How to choose the right technology

In industrial powder filling, technology selection depends first on product characteristics, production targets, and the packaging. The machine builder will help you clarify your project:

1. Characterize your powder (flow, density, dust, blend)

2. Set the objectives: dose, throughput, accuracy, cleanliness level, cleaning/recipe change

3. Choose the technology + define the tooling

4. Validate through trials on your powders

It is the powder characteristics and the performance targets that drive the solution.

3. Environments and constraints

Beyond the product itself, the boundaries of an industrial powder-filling project also depend on the environment, compliance, and cleanability.

Legal metrology

Legal metrology covers requirements and control procedures to ensure production quality and traceability.
The term “gravimetric doser” is a protected term. It refers to automatic weighing instruments (AWI).
To manufacture gravimetric dosers, a machine builder must have an EC type-examination certificate.

IQ/OQ/PQ qualification and “data integrity”

In the pharmaceutical sector, IQ/OQ/PQ qualifications are often required.
Increasingly, 21 CFR Part 11 is also required. It governs electronic records/e-signatures (linked to traceability and data integrity requirements).
Other sectors such as cosmetics and the food industry also request qualifications and CFR 21 Part 11.

Cleanrooms and ultra-clean environments

Cleanroom packaging (ISO 14644-1) is made possible by cleanability, the choice of materials/surfaces/processes, and the addition of complementary equipment (e.g., laminar flow).

ATEX zones

In areas subject to explosion risks (ATEX zones), electrical and non-electrical equipment must comply with technical requirements.

Machinery Directive / Machinery Regulation (CE)

In Europe, an industrial machine must meet safety and compliance requirements to be placed on the market (risk assessment, documentation, CE marking). Regulations are evolving: the Machinery Directive is being replaced by the Machinery Regulation (EU) 2023/1230, which applies more uniformly across the EU. In practice, this increases the importance of a clear specification and complete technical documentation from the start of the project.

Filling powder is an expertise: each powder has its constraints, each environment its requirements, and tooling often makes the difference.

4. Industrial validation and tests

To commit to accuracy, throughput, cleanliness, and cleanability, a machine builder must carry out trials.

MOM organizes trials on your powder and your packaging formats to validate the technology, tooling, area cleanliness, and cleaning times. Let’s discuss your specification and production constraints.

Conclusion

Industrial powder filling relies on three decisions: understand the product type, choose the appropriate dosing technology, and validate the solution under conditions close to real production. This guide gathers the fundamental technical principles to structure that decision and guide machine selection. For specific applications, the dedicated guides (collagen, proteins, chicory, etc.) provide deeper, real-world case detail with MOM Packaging’s expertise.

FAQ — Powder filling

Cet article Complete guide to industrial powder filling est apparu en premier sur MOM PACKAGING.

Product variability: why two collagen powders do not fill the same way

Collagen powder is made of collagen peptides. Depending on the manufacturing process, noticeable variations can be observed from one powder to another.
In practice, on the samples analyzed, bulk density ranges from 0.40 to 0.60. This data, together with flow behavior, directly impacts dosing sizing and tooling.
The behavior of a collagen powder can also change depending on its origin (e.g., marine vs bovine collagen) and the manufacturing process.
Therefore, it is important to warn readers: knowing the extreme characteristics makes it possible to handle all collagen varieties.

Flowability: a fairly free-flowing powder… but not always

In certain observed collagen formulations, the powder is described as fairly free-flowing, fairly pourable, slightly sticky, and with very low caking tendency.
This is why these characteristics are critical for dosing tool design: they allow dosing with precision, cleanliness (no fines), and at high throughput.

Static electrcity: a point not to underestimate

Collagen powder may be electrostatic. An electrostatic powder adheres more easily to packaging surfaces. As a result, it can dirty them and disrupt dosing consistency.
Therefore, for clean dosing, this must be considered during tooling design and confirmed during real-condition trials.

Dustiness: how to manage fines in a collagen powder filling machine?

Collagen powder can be dusty (and sometimes VERY dusty). A dusty powder generates fines; in this case, the main risk is contamination of sealing areas and build-up (fouling).
However, this issue is not unsolvable. Technically advanced machine builders act on the cleanliness of the filling environment, especially around transfer, dosing, and packaging closing zones.
It is necessary to keep the process stable and limit the impact of fines on production.

Blends: when collagen powder can become sticky

Collagen powder is often blended with other ingredients (vitamin E, hyaluronic acid, etc.). The purpose is to specialize the collagen, for example for joints, skin beauty, etc.
Indeed, these additions can modify powder behavior and make it more sticky.
Again, product characterization is essential to secure equipment selection and define tooling suitable for all your collagens.

What dosing solution for a collagen filling machine?

What guides the choice

For supplement powders, the key objectives are repeatability (achieving the same dose consistently over time), cleanliness, and throughput.
The choice of dosing technology must take into account:

• powder behavior (bulk density, flowability, electrostatic effects, dustiness)

• whether blends are present

• cleaning requirements / production organization (food, cosmetics, pharma)

• packaging formats and required speeds

Key point: tooling can make the difference

Even with an appropriate dosing technology, tooling is critical: the design of the screw / dosing element depends on the product’s characteristics.
If you have several producers or several collagen types, you may need different dosing tooling depending on the powders to maintain consistent filling.

Product feeding and cleaning: securing production for all markets

Product feeding: do not generate fines

Choosing dosing technology is not enough. In addition, you must define how the dry-product filling machine is fed with powder, to avoid generating upstream dust.
A feed flow synchronized with the machine will help maintain a constant level in the doser and further optimize accuracy.

Cleaning an industrial collagen powder filling machine: key checkpoints

Before choosing an industrial collagen powder filling machine, make sure to check:

• Are the product-contact parts easy to disassemble?

• Does disassembly allow cleaning quality suitable for your market?

• Does the design limit areas where powder can accumulate (fine / electrostatic powder)?

• How simple and fast is disassembly (direct impact on downtime)?

Attend production trials for industrial collagen powder filling machines

To secure a collagen project, the most reliable approach is validation in real conditions: request to attend production trials.

In summary, these tests allow you to check:

• dosing accuracy

• consistency (across consecutive containers)

• throughput

• whether electrostatic effects impact performance

• dust/fines level and zone cleanliness

• simplicity and speed of disassembly for cleaning

• dosing robustness across different collagen types (e.g., marine vs bovine) or different suppliers

In recent years, MOM Packaging has supplied collagen powder filling machines every year.
Since 1927, MOM Packaging has designed dosing and filling machines with longstanding expertise in powders and dry products.

For a broader technical overview of powder behavior, dosing technologies, and industrial validation methods, read our Complete Guide to Industrial Powder Filling.

FAQ — Industrial collagen powder filling

Cet article Collagen filling machine est apparu en premier sur MOM PACKAGING.