Reasons and solutions for difficulties in demolding finished plastic molds

Finished mucous membrane (difficult demolding) refers to a phenomenon in which the molded product of a plastic mold cannot be completely or quickly removed from the mold during production. This phenomenon will greatly increase the failure rate of products, increase costs, and reduce customer satisfaction, so it is urgent to solve it. Let's first analyze the reasons for the difficulty in removing the mucous membrane/demolding of plastic mold products:

Analysis of the reasons for poor demolding of plastic molds:

1. According to the size and temperature of the molded product, an increase in demolding resistance will result in poor demolding:

Although it may also be affected by resin properties and molding conditions, the main reason still lies in the shape of the molded product and the structure of the mold. Special attention should be paid to the situation when accompanied by slender reinforcing ribs, wheel hubs, and plastic hole bolts tightly;

2. When the molding shrinkage around the plastic hole plug is too large, the clamping force on the plastic hole plug will increase, which can easily lead to poor demolding:

In terms of molding conditions, low mold temperature and excessive holding pressure can easily cause poor demolding;

3. When long reinforcing ribs or wheel hubs are filled in vertically formed products, these reinforcing ribs or wheel hubs will become difficult to detach, resulting in poor demolding:

In terms of molding conditions, low mold temperature and excessive holding pressure can easily cause poor demolding. This is exactly the opposite of holding the plastic hole bolt tightly;

4. When the demolding slope of the cavity product department is too small, due to the high demolding resistance, demolding defects are prone to occur:

The position of the ejector pin also has a significant impact (it is best to set the ejector pin in areas with high demolding resistance). In addition, the smoothness or damage of the mold cavity surface also affects the demolding resistance, resulting in poor demolding.