1. From the feeding section to the connection between the barrel and the forming die, the temperature of each section of the barrel of the sheet machine is different, and the temperature gradually increases.

2. The temperature of the forming die should be slightly higher than that of the cylinder. In general, the temperature difference should be controlled between 5-10 °C, and the temperature at both ends of the mold is also slightly higher than the middle temperature. The temperature difference is the same as before.

3. The height of the three-roller intermediate roller is on a plane with the lower lip of the mold, and the lip end face is parallel to the intermediate roller.

4. In order to make the melt form a uniform thickness in the mold, the temperature of the forming mold should be kept at a certain temperature value.

5. In order to avoid affecting the thickness of the sheet, the working temperature of the three-roller of the sheet machine should be higher than the speed of the sheet extrusion die, and the speed should be stable.