Plastic profile production line is a kind of plastic machinery. Sheet machine, sheet production line, sheet equipment, sheet extruder.
Operation method
1. Preheating of PVC plastic sheet production line: This is the action of heating the mold before starting the machine. It needs to be preheated and the mold needs to be closed for heating.
2. Closing: Reasonable adjustment of the opening and closing stroke is conducive to improving the demolding and feeding effect of the product.
3. Preheating of PVC plastic sheet production line: Steam enters the fixed transfer mold to preheat the mold. While the mold is preheated, the condensed water and cold air during the retention period are discharged. Function: Increase the mold temperature and enhance the apparent sintering degree of the product.
4. Penetration heating: Improve the core and internal sintering of the product. Penetration heating consumes and wastes steam more seriously.
5. Heating on both sides: Further enhance the heating effect and improve the surface quality of the product.
6. Reheating (insulation): All valves are closed, and the residual heat of the mold is fully utilized to keep the product warm and heated. It is beneficial to the surface sintering of the product and can save energy (steam) better.
7. Vacuum cooling: The vacuum valve is opened and the vacuum pump is used to evacuate the mold and the product. The residual heat and moisture in the mold and the product are completely emptied, and part of the foaming agent is removed to prevent the product from swelling. Negative pressure is formed in the mold, which is conducive to demolding the product.