Reasons for shrinkage marks during New Car injection molding

Injection molding of Fuel Car is an important production process for the production of various high-specification plastic equipment and accessories. Many industries are related to large-scale plastic processing.

In the process of New Car injection molding, quality control is very important, but sometimes, some problems are inevitable, such as shrinkage marks. So what are the reasons for the appearance of shrinkage marks? Let me briefly introduce it to you.

In the process of large-scale plastic processing, if shrinkage marks appear in the thicker parts of some plastic parts, the main reason is that the cooling speed of the thicker area is much slower than that of the surrounding area. The different cooling speeds during the injection molding of Fuel Car lead to depressions at the connection surface, which is shrinkage marks. This defect seriously limits the design and molding of plastic products, especially large thick-walled products such as the beveled casing of TV sets and the casing of monitors.

There may be one or more reasons for the appearance of shrinkage marks, including processing methods, component geometry, material selection, and mold design.

If it is due to material reasons, then this situation is usually unchangeable and can only be remanufactured; but if it is due to premature cooling at the gate, which reduces the filling time in the cavity and increases the probability of shrinkage marks, the processing conditions can be adjusted to solve the plastic processing shrinkage.