Requirements that plastic molds need to meet
The coordinated changes of the convex and concave molds of the plastic mold and the auxiliary molding system can process a series of plastic parts of different shapes and sizes. In order to meet the needs of molded parts, we need to pay attention to some matters when choosing plastic molds and put forward corresponding requirements. Choose a more suitable plastic mold to meet the below following six requirements
1.High corrosion resistance. Many resins and additives have a corrosive effect on the surface of the cavity. This corrosion causes the metal on the surface of the cavity to corrode and peel off, the surface condition becomes worse, and the quality of the plastic parts deteriorates. Therefore, it is best to use corrosion-resistant steel, or chromium plating, cymbal nickel treatment on the cavity surface.
2.Good wear resistance. The gloss and accuracy of the surface of plastic products are directly related to the wear resistance of the surface of the plastic mold cavity, especially when glass fiber, inorganic fillers and certain pigments are added to some plastics. The plastic melt flows at high speed in the runner and mold cavity together, and the friction on the surface of the cavity is great. If the material is not wear-resistant, it will wear out quickly, which will damage the quality of the plastic part.
3.Good dimensional stability. When plastic molding, the temperature of the plastic mold cavity should reach 300℃ or more. For this reason, it is best to choose tool steel (heat-treated steel) that has been properly tempered. Otherwise it will cause changes in the microstructure of the material, resulting in changes in the size of the plastic mold.
4.Easily processed.mold parts are mostly made of metal materials, and some structural shapes are still very complex. In order to shorten the production cycle and improve efficiency, mold materials are required to be easy to process into the shape and accuracy required by the drawings.
5.Good polishing performance. Plastic plastic parts usually require good gloss and surface condition. Therefore, the roughness of the cavity surface is required to be very small. In this way, the surface of the cavity must be surface processed, such as polishing and grinding. Therefore, the selected steel should not contain rough impurities and pores.
6.It is less affected by heat treatment. In order to improve the hardness and wear resistance, the plastic mold is generally heat treated, but this treatment should make the size change small. Therefore, it is best to use pre-hardened steel that can be machined.
Dongguan JK Technology Limited Company is an enterprise integrating plastic mold development and design, custom processing, mold manufacturing, and injection molding. Founded in 2012. With more than 10 years of senior industry design engineers and experienced mold manufacturing technicians; with professional technology and efficient management, they have rich practical experience in mold design, manufacturing and management, and optimize mold structure and mold ranking. With CNC computer processing center, computer spark machine,grinding, drilling, wire cutting machine and other processing equipment, fully realize the integration of CAD/CAM processing. The injection molding workshop is equipped with more than 20 single-color and two shot injection molding machines of 120 to 250 tons,can meet the general needs of our customers. After years of hard work, it is now possible to sample a single-color mold for the first time in 9 days, and a two shot mold for the first sample in 18 days.
