The basic steps of the injection molding process:
1. Raw material preparation: First of all, it is necessary to prepare plastic raw materials suitable for making drainage pipes. Commonly used plastics include polyvinyl chloride (PVC), polyethylene (PE), etc. These plastics have good corrosion resistance and certain flexibility.
2. Heating and melting: plastic particles are heated to a molten state in the cylinder of the injection molding machine. In this process, the plastic is transformed from a solid state to a liquid state in order to facilitate subsequent injection molding.
3. Injection molding: The melted plastic is injected into the preheated mold through the nozzle of the injection molding machine at high pressure. The mold has the shape of a drain pipe inside, and the plastic fills the mold and cools and solidifies to form the desired shape.
4. Cooling setting: The plastic is cooled and cured in the mold, a process that may take a certain amount of time, depending on the type of plastic, wall thickness and mold design. During cooling, the mold may also receive external cooling treatment to speed up the forming process.
5. Stripping: When the plastic is completely cooled and cured, the mold is opened and the finished drain pipe is taken out. At this point, the drain pipe has its final size and shape.
6. Post-treatment: According to needs, the finished product may also need some post-treatment work, such as trimming excess scraps, surface treatment, etc., to ensure the quality and appearance of the product.
Injection molding technology has been widely used in the field of industrial pipeline manufacturing because of its high production efficiency, stable product size, and the ability to realize the formation of complex structures. However, the specific production process parameters (such as temperature, pressure, cooling time, etc.) need to be determined according to the type of plastic used and the specific requirements of the product.