Applied in BOPP

 BOPP,BOPET
 This kind of plastic products are characterized by high transparency, high precision and relatively high molding temperature, such as BOPET PET packaging tape and PET film. The special mesh changer has the following characteristics:

1) it has a "special position" exhaust mechanism and a flow channel. It can clean up the gas in the new net when changing the net and keep the pressure balance of the net change, and thoroughly solve the problem of "bubble".

2) The exhaust position is also the preheating position of the net block at the same time. It can be guaranteed that the net to be changed is the same as that of the net being changed, thus avoiding the fact that the low temperature of the new mesh leads to the crystallization of the melt and the flow becomes poor, and even the crystal point.

3)The ordinary mesh changer is a filter (porous plate) carrier directly in contact with the plastic melt. Because the mesh exchange needs to move back and forth friction, it is easy to produce black spot impurities, filter cleaning is also ineffective, because the carrier can not be cleaned directly. The special screen changer is different: the filter (perforated plate) and the carrier become a net block as a whole, and it circulates and moves in one direction, avoiding the occurrence of the black spot impurity, and after changing the net, it can be taken down and cleaned together. Clean mesh reinstalled with a new filter net has excellent fluidity. In order to maintain the stability of the mechanical rigid seal of the screen changer, the steel used is more wear-resistant and heat-resistant than that of the normal screen changer, and the runner is smoother. Special purpose screen changer