Volumetric Doser

Volumetric Doser
Volumetric Doser
Volumetric Doser
Volumetric Doser
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SCM

Volumetric dosing system for mixing and feeding of masterbatch, additive and virgin materials

In the plastic processing industry, this volumetric doser is perfect for the automatic mixing of new materials, recycled materials, color masterbatches, and additives. This dosing system features a motor with a 38:1 reduction ratio and offers various screw diameters (12mm, 16mm, 20mm, and 30mm), providing different output rates from 0.1 to 110 kg/hr. Additionally, there are dual-color dosers available that can be paired for simultaneous mixing of two different materials. For high-temperature applications, such as PET processing, the SCM-H model is suitable and requires cooling water to maintain optimal performance. This series of volumetric dosers support integration with extruders through simple wiring adjustments, ensuring synchronized operation with the extruder screw speeds and maintaining consistent masterbatch ratios. Due to the low consumption rates of masterbatch materials, these volumetric dosing systems can be combined with the VL positive pressure feeder for automatic replenishment, ensuring efficient and continuous production.


Features
  • Equipped with chrome-plated screws that ensure long-lasting performance and resistance to wear and tear, providing reliability in demanding industrial environments.
  • The inclusion of a DC brushless motor eliminates the need for regular maintenance, reducing downtime and operational costs while ensuring consistent performance.
  • The base is fitted with a hopper magnet to prevent metallic contaminants from damaging the machine’s screw, safeguarding the equipment and ensuring product integrity.
  • Designed to seamlessly integrate with external signal inputs, allowing for easy adaptation to various production workflows and enhancing operational versatility.
  • Features a memory function that retains the current operating mode during power outages, resuming normal operations automatically once power is restored, ensuring minimal disruption.
  • The volumetric doser’s speed automatically adjusts in sync with the extruder’s processing speed, maintaining precise material ratios and ensuring consistent product quality.
  • Includes advanced jam detection and overload protection, automatically shutting down the system and triggering an alarm to prevent damage and ensure safety.
  • Capable of adding color masterbatch in precisely controlled micro quantities at set cycle intervals, offering high accuracy for critical applications.
  • Equipped with RS485 communication interfaces, enabling remote monitoring and control, and facilitating integration with modern automated production systems.
Applications

For PET and other high-temperature applications, a specialized high-temperature version is available. This model requires cooling water injection to maintain optimal operating conditions. It also supports extruder mode, ensuring that the volumetric doser's metering remains synchronized with the extruder screw speed, providing stable and consistent color addition.

Specifications
Model Single-color doser Double-color doser Four-color doser
SCM-12 SCM-16 SCM-20 SCM-30 SCM-D SCM-4
Motor power (kW) 0.06 0.06 0.06 0.06 0.06×2 0.06×2
Mixer power (kW) 0.09 0.09 0.09 0.09 0.09 0.09
External diameter of screw (mm) 12 16 20 30 ** **
Output (kg/hr) 0.1~8 0.5~17 3~35 8~102 * *
Storage hopper (L) Standard 10 10 10 10 10 10
Optional heavy-duty base 15 15 15 15 15  
Gear ratio 38:1 38:1 38:1 38:1 38:1/38:1 38:1
Main material hopper (L) 〇(15) 〇(15) ○(15) 〇(15) 〇(15) ●(15)
Mixer O O O O O  
Heavy-duty base O O O O O
Dimensions H(mm) 520 520 520 520 520 736
W(mm) 610 610 610 610 1045 1125
D(mm) 335 335 335 335 410 1125
Weight (kg) 22 22 22 22 34 75
Notes:
1) "*" stands for that the output capacity depends on the model selected, data of single color doser can be for reference
2) "**" stands for that the external diameter of screw depends on the model selected
3) All output capacities of above models are based on the masterbatch data of 0.8kg/L in bulk density and 2-3mm in diameter in a test criteria of continuous running, the actual output capacity depends on material properties and design formula
4) "●" stands for standard, "〇" stands for optional, "—" stands for none
5) Power: 1φ, 230VAC, 50Hz
We reserve the right to change specifications without prior notice.
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