How to solve the deformation problem of flat injection molded parts? The area of the flat injection molded parts is large and the amount of shrinkage is large. Due to the extremely serious molecular orientation of the large injection molded parts and the uneven cooling of the Plastic Injection Mould
, the shrinkage of the injection molded parts in all directions is inconsistent, resulting in the deformation and distortion of the thin and large flat injection molded parts. Sometimes a large surface of a large-scale injection molded part is designed with a support bone, and the injection molded part must be bent toward one side.
To solve the problem of deformation of large-scale injection molded parts completely is a problem. In production, Plastic Injection Molding Machine Supplier
has summarized some effective measures to improve the deformation problem:
1. Change the mold into multi-point water, and the large-plane injection molded parts above 24 amps should reach more than 4 points. This can reduce the degree of molecular alignment and reduce the inconsistency of the inconsistent contractions.
2. Appropriately increase the mold temperature, ABS material is usually kept above 60 °C, to reduce the cooling rate of the injection molded parts, reduce the temperature difference deformation caused by the chill transition, and at the same time reduce the degree of molecular orientation.
3. The most important one is to increase the injection pressure or holding pressure, and greatly extend the time of injection or pressure retention, so that the size of the injection molded part is increased, and the amount of shrinkage is reduced. Significant improvements have been made. Therefore, extending the time of spraying or holding pressure (such as extending 10 to 15 seconds) has become an important means for us to solve the deformation problem.