The automatic mesh belt screen changer is mainly composed of the screen changer, the heating and cooling system, and the electric control system. There is no need of manual operation of the screen changer because the material fluid inside flows by itself under the pressure caused by the melt production.

Type	Screen Belt W(mm)×L(m)	Heating power(kw)	Pressure (Mpa)	Output (kg/h)
DHW--70	76×10	2.5	≤40	≤200
DHW--100	107×10	3.5	≤40	≤500
DHW--120	130×10	5	≤35	≤800
DHW--150	160×10	7.5	≤35	≤1500
DHW--170	180×10	12.5	≤35	≤2000
DHW--200	210×10	14	≤35	≤3500

How to work
Automatical belt screen changerThe screen moves across the flow of plastic melt and a fresh screen enters as the spent filter screen exits; removing the impurities from the raw material. The belt screen changer is fitted between the end flange of the extruder and the die. A cassette holding a roll of screen filter is attached to the side of the belt screen changer block. The controlling box of belt screen changer is equipped with a pressure sensor, and a pressure warning device, when the pressure is raise to the preset , it will automatically alarm, at the same time, the screen is replaced automatically. And the cooling system begin to work , the impurity is cooled and moved out with the filter screen.

Features of Automatical belt screen changer
1. Automatically and continuous screen replacement without manual operation.

2. No fluctuation of material flow, no product deformation, excellent quality stability.

3. No waste product or waste material, and little material consumption occur when the                    screen changer works.

4. Simple construction, reliable operation; Easy maintenance, lower running cost;

Automatic screen replacing by pressure differential of the plastic melt; Machine will not be stopped as the screen replacing.