General reasons for unsmooth surface of extruded sheet in twin screw extruder

Sheet extrusion production equipment twin screw extruder extrusion plate surface is not smooth what is the general reason? Enjiadi, the manufacturer of sheet extrusion equipment, introduces that if it is a mold, it usually has the following conditions:

1. The recycled material is used or the proportion of recycled material is too large, and the surface is not smooth due to too many impurities.

2. Too low temperature results in premature cooling of the melt. Increase the material temperature and mold temperature. Especially the mold temperature. Mold temperature has a significant effect on gloss.

3. Increase the pressure and the speed of the die. The holding time is longer.

4. Prevent gas interference. Prevent the degradation or incomplete plasticization of plastics.