Plastic Gravimetric blender systems for extrusion line

1.Application

GB series gravimetric blenders can be used in the fields of injection mouldingmachines, blow moulding machines and extrusion lines for proportionally precisemixing of several types of material. This series machines adopt SIEMENS PLC controller and latest ingredients calculation methods. The machine is controlled by an advanced microprocessor with a digital display that is simple to calibrate. Theself-compensation and calibration function ensure accurate material dosingpercentages. A high precision electronic weighing scale is used to ensure precise weighing of every batch and ensure accuracy to ±0.1%~ 0.3%. There are 42 models available to be selected based on various materials and throughputs.(This series are not suitable for powder and sheet pieces weighing)

2. Feature

Standard configuration

1) Evenly mixing of materials after accurately weighing, control accuracy strictly of ±0.1~±0.3%.

2) Auto calibration after each material weighting ensures accuracy.

3) Up to 100 recipes can be stored for later use.

4) Alarm log function.

5) All parts detachable for easy cleaning.

6) For GB-600 and models below, machine mount model is the standard supply (equipped with magnetic base,manual discharge valve), optional pneumatic slide gate is available also.

7) For GB-2000 and models above, floor stand is the standard supply (equipped with moveable floor stand, storage hopper and pneumatic slide gate);

8) Has the function of recycled material compensation (recycling hopper is standardly equipped with low level switch). Aberration compensation can be automatically calculated based to the feeding amount of recycled materials.

3. Working Principle

When machine starts working, storage hopper metering valve opens to let material fall into gravimetric hopper; when gravimetric sensor inside gravimetric hopper responses that weight reaches the default value, metering valve shuts while another storage hopper metering valve opens. In such a circle, gravimetric hopper shut-off valve opens when material needed to be mixed fall into gravimetric hopper and weight reaches default value. Mixers start to work when material falls into mixing tank. Once material in gravimetric hopper falls into mixing tank, gravimetric hopper shut-off valve shuts. Mixers keep working for a while when material is mixed evenly, mixing tank shut-off valve shuts. Finally material falls into storage tank or injection moulding machine. That is a complete circle.

4. Specifications