Should a filter be used for a water-soluble film blow molding machine?

Water soluble film blow molding machine is a plastic processing machine. After spraying liquid plastic out, the machine uses the wind force blown out by the machine to attach the plastic body to a certain shape of mold cavity, thereby making products. This machine is called a water-soluble film blow molding machine. Plastic is melted and quantitatively extruded in a screw extruder, then molded through a mouth film, cooled by an air ring, and then pulled by a traction machine at a certain speed, and wound into a roll by a winding machine.
During the extrusion process of plastic machinery, molten material is transported to the mold through a filter screen. A filter can filter materials and improve the mixing effect of materials. But the filter can also cause process fluctuations, leading to an increase in back pressure, a rise in molten material temperature, and sometimes a decrease.
The filter of the water-soluble film blow molding machine is fixed on a porous or grooved protective plate, which can form a seal between the water-soluble film blow molding machine and the mold. The pressure generated by a clean filter is very small, possibly only 50-100lb/in2 (1lb=0.4536Kg, 1in=25.4mm). As the amount of impurities trapped in the resin on the filter increases, the pressure increases to block the filter.