• Cooling System in Injection Molding (1) Apr 26, 2019
    The design of cooling system is very important in injection moulding. This is because only when the plastic parts are cooled and solidified to a certain hardness, can the plastic parts be avoided from deformation due to external force after demoulding.  Because the cooling time accounts for about 70% - 80% of the whole cycling time in moulding, a well-designed cooling system can greatly short...
  • The program control of injection speed Apr 26, 2019
    The program control of the injection speed is to divide the injection stroke of the screw into 3 to 4 stages, and each of the stages uses an appropriate injection speed. For example, when the molten plastic just starts to pass through the gate, the injection speed is slowed down, and during the filling process, high-speed injection is used, and the speed is slowed down at the end of filling. With ...
  • The main factors affecting mold life May 20, 2019
    The main factors affecting mold life. 1. The structure of the mold -effective mold structure helps to improve the load carrying capacity of the mold and reduce the mechanical load on the mold; 2. The material of the mold - should be selected according to the size of the production batch of the product parts;  The hardened mold will bring more shots and meet the high require for the mold treat...
  • The meaning of molding May 20, 2019
    Molding is a high quality, high efficient, low loss, strong adaptation manufacture technology. it's a valuable wealth in the society. Cause of the modernization of mold production technology, nowdays , mold has been widely used in the production of electric motors and electrical products, electronic computer products, instruments, household appliances and office equipment, automobiles, ordnance, g...
  • How to choose the mold steel for mirror polishing? May 20, 2019
    To make high quality mirror polishing on mold (cavity and core inserts, same as below), the requirement of mold surface polishing of mold is high, because this is the most important loop of mold manufacturing.  The surface with roughness and corrugated grain is an abnormal phenomena in mirror polishing of molds. Generally, it is the the mold steel material, the polishing method, or the inject...
  • What is the most important during designing a mould ? May 27, 2019
    The most important point is structure , If the structure can be simplified as much as possible, but the quality of the mold must be guaranteed, the company will earn the maximum profit from it .  When we received a product , the first question is find out the biggest parting surface , Roughly determine the cavity and the core , then , To Analyze the construction of cavity and core , insert , ...
  • Correct gate type and location for plastic mold Jun 10, 2019
    When we design a mould , to chosing the gate type and location  is very important.  It will caused processing problem , even the quanlity of plastic products. Mould design engineer  shouldn't only calculate for plastic products , but also should especially pay attention to the design for gate. They must chose the correct gate type , the numbers of gate and location . The gate type a...
  • Short Shot Injection Molding Jun 14, 2019
    Insufficient injection is also called short shot. Short shot is the phenomenon of partly incomplete at the end of the material flow, or a part of the cavity filled with dissatisfaction, especially the thin wall area or the end area of the the runner when injection molding. When the melt is cooled down without filling the mold cavity, or the melt does not fill completely after running into the cavi...
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A total of 13 pages

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