As a tool for producing plastic products, the injection mold also provides a complete structure and precise dimensional tools.Taking plastic products as an example, the gate is only a part of the injection mold pouring system.So what does it do? In fact, the door is the channel connecting the main channel and the cavity.It is the smallest part of the entire runner system, and the shape and size of the gate have a great influence on the quality of the product.
The role of the gate is mainly to control the flow rate.During injection, it can be stored in this part of the volume to prevent backflow; the molten material is subjected to strong shear and elevated temperature, thereby reducing the apparent degree and improving the fluidity.Separation of product and runner system.The design of gate shape, size and location depends on the nature of the plastic, the size and structure of the product.Generally, the cross-sectional shape of the door is rectangular or circular, the cross-sectional area should be small, and the length should be short.This is not only based on the above work, but also because the small gate becomes easier and the large narrow door is very difficult.The gate location should choose the thickest and unaffected appearance.The design of the gate size should take into account the nature of the plastic melt.The cavity is the space of the molded plastic product in the mold.The components used to form the cavity are collectively referred to as shaped parts.Each molded part usually has a special name.The forming part that forms the shape of the product is called a concave mold, which forms the internal shape of the product, and is called a core mold or a convex mold.
