Waterproof PVC Plastic Rigid Sheet is produced by making plastics (powder, granule, solution, etc.) into products of required shape through certain molding methods. With the rapid growth of polymer production and application, the processing and molding technology for processing polymer into various products has also been developed and improved accordingly. There are two processing methods: physical processing and chemical processing. Physical processing molding refers to the process of heating, melting and cooling plastics into products, such as extrusion molding, injection molding, calendering molding, casting molding, rotary molding, etc. Chemical processing molding refers to the chemical reaction in the process of processing, and then products are made, such as reaction injection molding.
The molding method of plastic products is determined according to the shape of the products. Some Waterproof PVC Plastic Rigid Sheet shapes can only be obtained by one molding method, while others can be obtained by two or more molding methods. PVC pipes are produced continuously by extrusion, and the axial section shape of products is the same. Because it is formed by continuous operation, it has high production efficiency and stable product quality. Injection molding is an intermittent operation to produce PVC pipe fittings, and the shape of products can be almost made into any shape. The products produced by calendering can only be films and plates. In addition to the processing and molding process, the production of PVC pipe fittings and PVC pipes requires mechanical processing, decoration and assembly of some products. Machining refers to drilling, turning, milling and other processing on the formed workpiece to complete the operations that cannot be realized or completed by the forming process; The purpose of decoration is to beautify the appearance of the product or achieve other purposes; Assembly is the process of connecting or matching each completed workpiece to make it a complete product.
To make Waterproof PVC Plastic Rigid Sheet and PVC pipes, the general procedures are: 1. Select materials or formulas; 2 Determine the molding process; 3. Design the product drawing and mold drawing and process them 4. Determine the best process conditions and test run them; 5. Test the product performance; 6. Adjust and improve the formula, mold and process conditions; 7. Large scale and stable production.