Precision injection mold process
Release time:
2023-03-17
Precision injection mold is a device in which a resin material is shot into a metal model to produce a product with a certain shape. In fact, in order to control the temperature of the mold, there are cooling holes, heaters and other devices on the mold for the refrigerant to pass through.
Precision injection mold is a device in which a resin material is shot into a metal model to produce a product with a certain shape. In fact, in order to control the temperature of the mold, there are cooling holes, heaters and other devices on the mold for the refrigerant to pass through. The material that has become a melt enters the main channel, passes through the diverter, and is shot into the mold cavity at the gate. After the cooling stage, the mold is opened, and the ejector device on the molding machine will ejector the ejector rod and push the product out. The forming product is composed of the main flow channel of the molten resin, the shunt channel and the product of guiding the molten resin into the mold cavity. We usually design the diverter to be the same length. The main channels and diverters in formed products are not products. They are sometimes discarded or crushed and reused as forming materials. We call it refeeding. The return material is generally not used as a molding material alone, and is usually used after mixing with the new material. This is because after a molding, the mechanical properties, fluidity, color and other characteristics of the resin will change.
Precision injection molding refers to the appearance accuracy of injection products should meet the strict dimensional tolerance, shape tolerance and surface roughness. To carry out precision injection molding must have many related conditions, and the most essential is the plastic material, injection molding mold, injection molding process and injection molding equipment these four basic factors. When designing plastic products, engineering plastic materials should be selected first, and engineering plastics capable of precision injection molding must choose those materials with high mechanical properties, dimensional stability, good creep resistance and environmental stress cracking resistance. Secondly, the suitable injection molding machine should be selected according to the selected plastic material, the dimensional accuracy of the finished product, the weight of the piece, the quality requirements and the expected mold structure.
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