what is plastic lunch box injection mold?
Plastic lunch box injection mold is a mold tool used for mass production of plastic lunch boxes. The injection molding process is to melt the thermoplastic material and inject it into the mold under high pressure through the injection molding machine, and then mold it after cooling to get the lunch box products. Injection mold is an indispensable part of this process, which determines the appearance, dimensional accuracy and surface quality of the finished product.
plastic lunch box injection mold design
1. Selection of mold materials
Plastic lunch box molds are usually made of high-performance mold steel, such as P20, 718H, S136, etc. These materials have wear resistance, corrosion resistance and good polishing properties. As the lunch box requires thin-walled, lightweight, the mold material must be able to withstand high pressure and high temperature, as well as stability and long service life in the production process.
How to choose the steel for plastic lunch box molds?
Given the high speed and high pressure injection molding, a steel with a hardness of HRC 42 or higher is required to ensure the longevity of the mold. In addition, the raw material for the boxes is usually transparent, which also dictates the use of highly polished steels. However, vacuum-hardened H13 steel, which also has a hardness of HRC 43-45, can be used as a second option for economic investment.
the future development trend
With the enhancement of environmental awareness, the use of biodegradable materials and recycled materials for plastic lunch boxes is gradually being promoted, which also puts forward new requirements for injection molds. The future of plastic lunch box mold may pay more attention to the compatibility of environmentally friendly materials, while more intelligent in the design, to enhance the level of automated production.
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