Continuous Feeding
& Dosing
Feeding Solutions for Continuous ManufacturinG
In continuous manufacturing processes, maintaining a steady, uninterrupted supply of material is critical to ensuring smooth and efficient operation. Trantec screw feeders are specifically designed for continuous feeding and dosing, delivering a consistent and controlled flow of material without the need for frequent stops or manual intervention. This capability minimises production downtime, reduces waste, and enhances overall process efficiency. By supporting reliable, round-the-clock operation, screw feeders play a vital role in cost-effective, high-performance material handling, making them indispensable across industries.
Consistent and Precise Flow Control
The hopper and feeder body geometry is designed to promote natural material flow, ensuring an even distribution of product into the auger inlet and reducing build-up. Working in tandem with the feeder body geometry, the contra-rotating agitator continuously stirs and conditions the material within the hopper, preventing issues like bridging, rat-holing, and material compaction. This ensures a steady flow of product into the auger, even with materials that tend to be sticky, cohesive, or poorly flowing. The auger then meters the material with high accuracy, and its speed can be easily adjusted to meet specific process demands. This level of control allows for flexible operation in both batch and continuous manufacturing environments and is critical in industries like pharmaceutical and nutraceutical, food production, and chemical powder handling, where uniformity is vital for product quality.
Handling a Wide Range of Materials
Trantec screw feeders are designed to handle a broad spectrum of bulk materials, from dry, free-flowing powders and granules to more challenging substances like cohesive powders and those prone to clumping, caking, or irregular flow. This versatility makes them well-suited for industries such as food processing, pharmaceuticals, chemicals, plastics, and nutraceuticals.
To accommodate varying material characteristics, Trantec feeders can be fitted with interchangeable augers and agitator configurations, optimising performance for each specific application. In continuous operation, they maintain precise, reliable feed rates across long production runs, whether dealing with fine, dusty powders or coarse, abrasive granules.
Industry Versatility
Here are some industry specific examples where screw feeders play a vital role in continuous operations.
Food Processing – In large-scale food manufacturing, or the production of seasonings, sauces, or snacks, screw feeders are used to add consistent amounts of salt, sugar, spices, seasonings, or other powdered ingredients in precise amounts for consistency in taste and texture.
Plastics & Polymer Handling – In plastics and compounding industries, screw feeders deliver precise amounts of colourants, additives, fillers, and resins into extruders or blending systems. They help maintain consistent ratios in formulations and improve processing efficiency in continuous operations.
Chemical Manufacturing – In chemical production processes, precise and continuous feeding of additives, catalysts, or other chemicals is necessary for controlled reactions. With another example being the continuous dosing of powders like pigments or fillers into a mixing or blending process is another common application.
Pharmaceutical & Nutraceutical – Precision is critical in pharmaceutical manufacturing. Screw feeders are used to deliver exact quantities of active pharmaceutical ingredients (APIs), excipients, and fine powders into tablet presses, capsule fillers, or continuous mixers. Their hygienic, GMP-compliant design ensures ease of cleaning and validation between product batches, helping to maintain purity and prevent cross-contamination.
Continuous Dosing in Batches
In many industrial processes, a hybrid approach is sometimes needed that combines continuous dosing with batching. This can be accomplished using metering screw feeders, which accurately dispense materials and ingredients at a controlled flow rate until a precise quantity is reached. The screw feeder delivers material continuously, but the overall process is designed to stop once a preset target quantity, defined by the batch recipe, has been delivered. This approach is beneficial when certain ingredients must be introduced steadily over time rather than all at once. In some batching applications, constant dosing of specific materials is necessary for reasons such as:
- Uniform Mixing – Some materials must be added gradually to ensure even dispersion within the batch, preventing clumping or segregation.
- Reaction Control – In chemical or thermal processes, gradual dosing helps control reaction rates or temperature, avoiding unsafe spikes.
- Moisture or Temperature Sensitivity – Sensitive materials might degrade if exposed to conditions in the mixer for too long, continuous dosing minimises residence time.
- Process Synchronisation – Dosing in real-time alongside other ingredient additions ensures that the batch composition evolves correctly over time.
By using screw feeders for continuous dosing within a batch framework, manufacturers can achieve high precision, better product consistency, and improved process efficiency.
Examples of combined continous abd batching bosing with screw feeders
Pharmaceutical Industry – Granulation Process – In tablet or capsule production, active ingredients and excipients are continuously fed into a granulator, but the total amount is batch-controlled. The screw feeder feeds ingredients into the granulation or mixing process, ensuring that a specified quantity is delivered for each batch.
Food & Beverage – Baking or Confectionery Production – In large-scale production of cookies, cakes, or confections, ingredients like flour, sugar, and additives need to be continuously fed into the mixing system. However, the total amount of each ingredient is controlled by batching. A screw feeder can be used to supply flour continuously into a mixer, while the total flour amount for each batch is controlled by the system.
Chemical Manufacturing – Polymer Production – For some chemical processes, screw feeders continuously feed powdered additives, pigments, or chemicals into a reactor or mixer. The exact quantity of the additives is controlled in batches, ensuring precise formulation for each product batch.
Feeder Models
True-flow screw feeder (efficient & cost-effective) – If your process demands precise and consistent material feeding, but you also need a cost-effective solution, the Trantec TrueFlow Screw Feeder is the perfect fit. It strikes an ideal balance between performance and affordability, offering smooth operation, straightforward maintenance, and dependable results with minimal complexity. Designed with value in mind, the TrueFlow Screw Feeder delivers reliable, repeatable feeding at a price point that suits budget-conscious operations without compromising on quality.
QR Tec (easy-clean) – Trantecs quick-release feeder range is engineered for rapid, simple and safe, maintenance of our screw feeders, allowing full disassembly of the feeder in under three minutes without the need for tools. This significantly reduces downtime during routine cleaning and maintenance procedures. It features release handwheels for swift removal of all key components, combined with smooth, polished surfaces, and has a crevice-free construction to eliminate potential areas where product residue, bacteria, or contaminants could accumulate. The result is faster, more effective sanitation, less operational downtime, and improved overall equipment efficiency, supporting both compliance and productivity goals.
Pharmaceutical (Pharma Grade) – Trantec pharma-grade feeders are available with a bright polished or mirror finish (0.2 Ra), tailored to meet the requirements of your application. This ultra-smooth surface significantly reduces the risk of material build-up and cross-contamination while supporting consistent flow and easy product changeover.
Micro Feeder (Low Dosing applications) – Trantec Micro feeders are designed to dispense very small, controlled amounts of bulk materials, typically from a few milligrams to several grams per hour. Ideal for applications requiring ultra-low dosing, they are essential in industries like food production, pharmaceutical and chemical, where accuracy is critical. By ensuring consistent and precise material delivery, micro screw feeders help maintain product quality, where even minor dosing errors can affect performance and compliance.
Customised Designs – We understand that no two applications are the same, which is why we offer customised solutions, tailored to your specific material-handling requirements. Whether you’re working with challenging materials, unique flow characteristics, space constraints, or specialised throughput needs, we can engineer a solution that aligns perfectly with your operational objectives. Our team works closely with you to develop configurations that enhance performance, streamline integration into your existing system, and ensure long-term reliability. From selecting the right materials and finishes to incorporating performance-enhancing features, our custom designs are focused on delivering maximum productivity, operational flexibility, and consistent results.