Dosing & Mixing System Equipment

Model THA Series

Color Masterbatch Screw Doser

Name: Color Masterbatch Screw Doser
Brand: TONGYI

Precision screw dosing system for automatic proportional feeding of masterbatch, regrind, and additives, with metering accuracy within ±1%, single- and double-color configurations, and recipe memory for consistent production.

±1% Metering Accuracy Precision screw dosing maintains consistent additive proportions throughout production.

0.1–40 kg/h Output Range Multiple screw sizes cover a wide range of dosing requirements.

50 Sets Recipe Memory Stored production recipes enable fast setup and repeatable parameter recall.

Request a Quote View Product Overview

Metering Accuracy: ±1 %
Output Capacity: 0.1–40 kg/h
Screw Diameter: 12–24 mm
Recipe Memory: 50 sets

Core Advantages

Consistent Dosing for Stable Production

The THA Series Screw Doser is designed for automatic proportional feeding of masterbatch, regrind material, and other additives in injection molding and extrusion processes. A brushless DC motor drives the precision screw according to preset process parameters, providing stable and repeatable dosing with accuracy within ±1% of the set value. The PLC control system and HMI touch panel simplify parameter setting, while automatic calculation and compensation help maintain consistent material proportions during production. Single-color and double-color configurations are available with multiple screw diameters and output ranges. Recipe storage, modular construction, adjustable screw installation, abnormal-condition detection, and machine synchronization make the THA Series suitable for flexible and continuous production.

Consistent Material Proportion

Precise screw metering helps maintain stable masterbatch and additive ratios for consistent product quality.

Faster Product Changeover

Stored recipes allow operators to quickly recall previous settings without repeatedly adjusting parameters.

Flexible Dosing Configuration

Single- and double-color models support different material combinations and production requirements.

Reduced Maintenance Time

Modular construction allows easier cleaning, screw replacement, and routine servicing.

Key Features

Designed for Precise and Flexible Material Dosing

PLC & HMI Control PLC control and an HMI touch panel simplify parameter input, dosing calculation, and production monitoring.
Automatic Dosing Compensation The control system automatically calculates screw speed and applies compensation to maintain the required material ratio.
Brushless DC Motor Brushless DC drive technology provides stable speed control, long service life, and low maintenance requirements.
Wear-Resistant Dosing Screw Chrome-plated dosing screws provide improved wear resistance, while the installation angle can be adjusted for optimized feeding.
Modular Construction Detachable components make it easier to clean the dosing unit and replace screws or sleeves when changing materials.
Machine Synchronization External signal input allows dosing operation to synchronize with injection molding or extrusion equipment.
Jam & Overload Protection Jam & Overload Protection
Optional Level Detection An optional material level sensor provides low-material detection and shortage alarms.

Technical Specifications

Specification	THA-12	THA-16	THA-20	THA-24	THA-12D	THA-16D	THA-20D
Motor Power	30 W	30 W	30 W	30 W	30 W × 2	30 W × 2	30 W × 2
Motor Rotation Speed	600 RPM	600 RPM	600 RPM	600 RPM	600 RPM	600 RPM	600 RPM
Mixing Power	90 W	90 W	90 W	90 W	90 W	90 W	90 W
Screw Diameter	12 mm	16 mm	20 mm	24 mm	12 mm	16 mm	20 mm
Output Capacity	0.1–3 kg/h	0.1–3 kg/h	0.4–20 kg/h	0.8–38 kg/h	0.2–6 kg/h	0.6–20 kg/h	0.8–40 kg/h
Material Storage Tank	12 L	12 L	12 L	12 L	12 L × 2	12 L × 2	12 L × 2
Reduction Ratio	30	30	30	30	30	30	30
Machine Dimensions	600 × 300 × 520 mm	600 × 300 × 520 mm	600 × 300 × 520 mm	600 × 300 × 520 mm	1050 × 300 × 520 mm	1050 × 300 × 520 mm	1050 × 300 × 520 mm
Weight	25 kg	25 kg	25 kg	25 kg	50 kg	50 kg	50 kg

Swipe horizontally to compare all models.

Specifications are subject to change without notice. Contact us for the latest project data.

Operating Workflow

How It Works

Machine Signal Input

The dosing system receives a synchronized operating signal from the injection molding or extrusion machine.

Automatic Parameter Control

The controller calculates and regulates screw speed according to the preset dosing ratio and production parameters.

Precision Screw Dosing

The motor drives the dosing screw to meter the required quantity of masterbatch, regrind, or additive.

Material Mixing

The dosed material is introduced into the main resin stream and mixed before entering the processing machine.

Continuous Synchronized Dosing

The dosing cycle repeats automatically with each machine cycle to maintain a consistent material proportion.