How to solve the water ripple of extruded sheet PVC

Enjiadi, the manufacturer of sheet extrusion equipment, introduces how to solve the water ripple of extruded sheet PVC

Under normal circumstances, the sheet or plate coming out of the die of the die head should pass through the cooling equipment and towing equipment. The towing equipment is mainly responsible for controlling the speed of towing and extrusion, and the cooling equipment controls the temperature of extrusion. This situation should be typical of the basic speed > drag speed, which leads to too much material accumulation in unit time, resulting in ripple;

Solutions for sheet extrusion equipment manufacturers: 1. Adjust the speed of extruder (if the overall transverse ripple is consistent); 2. Adjust the extrusion die to keep the speed of each point at the material outlet (if the transverse ripple is inconsistent). The main reason is that there is rubber or plastic expansion effect in the basic die