Precision Injection Mold Process

2023-03-17

Precision injection mold refers to a device that obtains a product with a certain shape after the resin material is injected into the metal model. In fact, in order to control the temperature of the mold, there are cooling holes, heaters and other devices on the mold that allow the refrigerant to pass through.

Precision Injection Mold Process

Precision injection mold refers to a device that injects resin material into a metal model to obtain 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 that allow the refrigerant to pass through. The material that has become a melt enters the main channel, passes through the runner, and the gate is injected into the mold cavity. After the cooling stage, the mold is opened, and the ejector device on the molding machine will eject the ejector rod to push out the product. A molded product is composed of a main channel that flows the molten resin, a runner that guides the molten resin into the cavity, and the product. We usually design the length of the runners to be equal. The use of recycled materials The sprue and runner in the molded product are not products, and they are sometimes discarded or crushed and reused as molding materials. We call it return material. Recycled materials are generally not used alone as molding materials, but are usually mixed with new materials. This is because after one molding, the mechanical properties, fluidity, color and other properties of the resin will change.

Precision injection molding means that the appearance accuracy of injection molded products should meet strict dimensional tolerances, shape tolerances and surface roughness. There must be many related conditions for precision injection molding, but the most essential are the four basic factors of plastic material, injection mold, injection molding process and injection molding equipment. 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, stable dimensions, good creep resistance, and environmental stress cracking resistance. Secondly, the appropriate 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.