Double screw plastic color volumetric doser

Precise Dosing Solution for Plastic Processors and Manufacturers

This double screw doser serves as a critical component for plastic processing facilities requiring consistent masterbatch dosing. Designed for engineers and production managers, the system automates the feeding of color additives, supporting rapid formulation changes and minimal downtime. Through its accurate metering capabilities, this plastic color volumetric doser enables precise control of color consistency, reducing waste and ensuring finished product uniformity. The machine is well-suited for manufacturers focused on injection molding, extrusion, and blow molding processes who require reliable dosing precision. Our company, a trusted volumetric doser supplier, offers this dosing equipment for streamlined integration into modern production lines.

Advanced Engineering Features Deliver Consistent Output and Durability

Equipped with robust chrome-plated double screws and a corrosion-resistant stainless steel body, this masterbatch dosing machine wholesale variant provides reliable wear resistance in industrial environments. The system includes a brushless DC motor with a wide rotary speed range of 1.8 to 300 rpm, enabling adjustable output rates from 0.05 to 20 kg/h per doser. A programmable logic controller (PLC) offers sophisticated dosing management through memory storage of up to 50 formulas, enhancing batch repeatability and recipe switching efficiency. With multiple feed channels and modular design for easy cleaning and maintenance, this plastic dosing equipment supplier delivers a turnkey solution that combines precision, longevity, and low operational overhead.

 Double screw plastic color volumetric doser

Features for Double screw volumetric doser
The metering masterbatch machine is suitable for the automatic proportioning of new materials, secondary materials, masterbatch, or additives, and the error value is not higher than ±1%.
The standard model of metering masterbatch machines cannot be used for the treatment of all kinds of plastic powder masterbatch and the treatment of all kinds of food, chemicals, flammable, explosive, and volatile materials. If the customer's product is an optical industry product, such as PC, PMMA, etc., the standard masterbatch machine model cannot be selected. The part in contact with the raw material needs special treatment, such as the use of food-grade materials and polishing treatment.


working principle for  Double screw volumetric doser
The signal from the control box is transmitted to the motor, the motor starts to rotate, and the screw is driven to rotate through the coupling. The color masterbatch in the hopper falls into the drop rod, is squeezed by the screw, and is conveyed to the base by the screw, so as to achieve the purpose of accurately metering and conveying the color masterbatch.

Standard configuration for Double screw volumetric doser
1. It has the function of permanent memory and storage of data;
2. Using DC brushless motor, no maintenance required;
3. Using microcomputer control, intelligent and precise calculation;
4. It can meet the requirements of external signal input at the same time;
5. The screw is chrome-plated, which is durable;
6. Modular assembly structure, easy to disassemble and assemble, easy to clean and exchange;

Optional configuration for Masterbatch Double screw volumetric doser
1. When the customer is equipped with a dryer of 100KG or below, a large base is required;
2. The metering masterbatch machine can add up to four masterbatches;
3. Optional touch screen control panel;
4. The main hopper is optional to facilitate customers to add main raw materials.

Product Details

Motor of Volumetric Doser

Using the high accuracy hybrid stepping motor,
Measurement accuracy and output scope.








 

PLC Panel of Volumetric Doser

The adopted PLC panel shows reliable performance and easy maintenance,
Can store 50sets of formula, can quickly start the machine.

 

Humanized Design of Volumetric Doser

The large opening on the side of the neck-piece,
large window, and improved static blending.

 

Dosing screw of Volumetric Doser

Dosing screw material is made by 304 stainless steel, and chrome plated for durability;
The specifications are optional 12/14/16/20/30mm.

Application for Double screw volumetric doser
In general, the metering masterbatch machine is directly installed at the inlet of the molding machine. In order to prevent the control box from shaking with the action of the molding machine screw and causing the loosening of related accessories, it is recommended to fix the control box on a bracket. The motor reduction ratio of this product is divided into 30:1 and 50:1, etc. The screw diameter is divided into five types: 12, 16, 20, 25, and 30mm. Six models can be evolved to provide different outputs from 0.1 to 50 kg per hour. For customers to choose. There is also a two-color masterbatch machine, which can be combined with any two masterbatch machines according to customer needs. Metering masterbatch mixer/ Colors Volumetric Dosers.

• Accurate and Consistent Dosing – The double screw system ensures precise masterbatch and color additive feeding.
• Automated Workflow – Seamlessly integrates with vacuum loader, vacuum hopper loader, and crusher machine for plastic to optimize workflow.
• Smart Control System – PLC digital panel allows easy monitoring and adjustment of dosing parameters.
• Energy-Saving and Cost-Effective – Low-power consumption design reduces energy costs while maintaining high dosing accuracy.
• Durable and Hygienic – Stainless steel construction prevents contamination and ensures long-term reliability.

Use Scenarios

Color Masterbatch Recipe Development and Validation in Plastic Manufacturing

Within plastic manufacturing R&D labs and pilot production lines, the double screw doser plays a key role in recipe development and validation by providing accurate and repeatable masterbatch dosing. This operational context demands high precision dosing to test new color formulations under various processing conditions. Integration with vacuum loaders and crusher machines allows realistic feed simulation, improving data reliability for scale-up processes. The volumetric doser supplier’s system, with its PLC memory storage for multiple formulas, accelerates iterative testing and formula optimization. This ensures the final product meets strict color consistency requirements, supporting quality assurance protocols and compliance in plastic component production.

High-Throughput Production Line Integration for Continuous Dosing Accuracy

In large-scale extrusion or injection molding plants, this double screw doser functions as an essential automated component for continuous masterbatch and color additive dosing. Positioned within a high-throughput workflow, the machine maintains stable dosing rates and minimal variation across extended production runs, reducing material waste and batch inconsistencies. By seamlessly integrating into existing plastic processing auxiliary systems, including feeders and grinders, the plastic color volumetric doser ensures synchronized operation with upstream and downstream machinery. Its durable construction withstands industrial wear, and on-line dosing stability is maintained under rigorous operational demands, enhancing overall line efficiency and product quality assurance.

FAQ

 What plastic materials can the Double screw plastic color volumetric doser handle?

Our double screw doser is designed for precise dosing of masterbatch and color additives used in various plastic materials during injection molding, extrusion, and blow molding processes. It supports consistent feeding across multiple materials, ensuring high accuracy and color uniformity in your production line.

Can you customize the volumetric doser to meet specific production needs?

Yes, we offer OEM customization for all our plastic auxiliary machines, including the plastic color volumetric doser. You can request configurations like larger hopper capacity, additional dosing channels, or touch-screen control to tailor the doser to your exact process requirements.

What installation and integration support do you provide for your dosing machines?

We assist with integration of the double screw doser alongside vacuum loaders, crusher machines, and other plastics processing equipment. Our technical team guides you on setup, calibration, and operation to ensure seamless automation and optimal dosing performance on your production line.

What are the delivery and after-sales support options for your plastic dosing equipment?

We provide global shipping for our masterbatch dosing machine wholesale products with reliable packaging to protect your order. The doser includes a 1-year warranty and lifetime technical support to help maintain performance and troubleshoot any issues during your operation.