Precision injection mold
Precision injection molds are mass-produced parts with complex shapes using precision machining methods. Specifically, the heat-melted material is injected into the cavity from a high pressure, and after cooling and solidification, various molded products are obtained.
A precision injection mold is a device that obtains a product with a certain shape after a resin material is injected into a metal mold. In fact, in order to control the temperature of the mold, there are also cooling holes, heaters and other devices on the mold. The material that has become the melt enters the main channel, and through the runner, the gate is injected into the mold cavity. After the cooling stage, the mold is opened, and the ejection device on the molding machine will eject the ejection rod to push out the product. The molded product is composed of a main flow path through which molten resin flows, and a shunt channel and product that guides the molten resin into the cavity. We usually design the lengths of the runners to be equal. Use of recycled material The main flow channel and the flow distribution channel in the molded product are not products, and may be discarded or crushed and used again as a molding material. We call it backfeed. Recycle material is generally not used alone as a molding material, usually after mixing with new material. This is because the resin's mechanical properties, fluidity, and color will change after one molding.
Precision injection molding refers to the appearance accuracy of injection molded products should meet strict dimensional tolerances, shape and position tolerances and surface roughness. There are many related conditions for precision injection molding. The most essential are the four basic factors of plastic materials, injection molds, injection molding processes and injection equipment. When designing plastic products, engineering plastic materials should be selected first, and engineering plastics that can be used for precision injection molding must choose materials with high mechanical properties, stable dimensions, good creep resistance, and resistance to environmental stress cracking. 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 product, the quality requirements and the expected mold structure.
1.Rapid mold manufacturing rapid mold making technology Short mold making cycle, simple process, easy to popularize, low mold cost, precision and life can meet a specific functional needs, good comprehensive economic benefits, is a fast, convenient and practical The mold manufacturing technology is especially suitable for new product development trial production, process verification and function verification, and multi-variety and small batch production. 2. Rapid manufacturing technology for precision injection molds. 3. Precision injection molding technology.
By reasonably determining the size and tolerances of the mold, adopting technical measures such as preventing shrinkage errors of injection molded products, injection deformation, demoulding deformation, flashover, etc., and ensuring mold accuracy, and adopting accurate precision injection molding processes and applicable engineering plastics Materials and precision injection molding equipment to achieve the best match.
