Mold development and designThe material and shrinkage rate of the product

When Ruiqingxuan Mould receives an order for mould manufacturing, a rich team of designers will begin to design plastic moulds. So, before designing, what do we need to prepare?

Today we will talk about one of the preparationsMold development and designAnd the material and shrinkage rate of the product. Before designing, we must figure out what kind of plastic the mold will be used for injecting in the future. What is the shrinkage rate of this plastic? Because of different plastics, their shrinkage, molding conditions, exhaust conditions, sealing conditions, sticking force, required draft angle, cooling conditions, water inlet size, runner size, corrosiveness, etc. are all not the same. Some are quite different. Therefore, in the structural design of the mold, it is necessary to comprehensively consider the above-mentioned various influencing factors.

The shrinkage rate refers to the shrinkage ratio value of a certain plastic material when it is cooled to room temperature in a molten state. All plastic materials have this characteristic, and different plastics have different shrinkage rates. Therefore, in the mold design of plastic products, the corresponding shrinkage rate must be included, and all parts of the plastic product must be included in the shrinkage rate.

Why should it be included in the shrinkage rate? Because plastics shrink when they are cooled to room temperature from a molten state, if the shrinkage rate is not included, but the actual size of the product is processed and manufactured, once it shrinks, the product will become smaller and it will be unqualified. Therefore, when the shrinkage rate is included in the mold processing, the size of the product on the mold is larger than the normal point. After the mold shrinks, it is exactly what we need.

The above is today’s sharing content, I hope to provide you with help, welcome to needMold development and designCall for consultation.