1, try to reduce uneven wall thickness, design with equal wall thickness, reduce internal stress and avoid deformation;

2. From the mechanical point of view, the bigger the plane, the easier it is to deform, avoiding plane design and making it into a three-dimensional part;

3. Micro-arc surface design of large area plane;

4. Add reinforcing ribs-rationally arrange and select the appropriate size of reinforcing ribs, but the thickness of reinforcing ribs should not exceed the thickness of top adhesive;

5. Increasing the wall thickness can also improve the stiffness, but the method to prevent the shrinkage of plastic parts is expensive and far less than the reinforcement method.

2. Improve the injection molding process:

Although you have been in the plastic mold manufacturing industry for many years, I will definitely surprise you. Increase the injection pressure in injection molding. Due to the injection pressure, the weight of 500 grams of PP plastic products may differ by 50 grams or more. Parts are lighter, the density becomes smaller, the stiffness becomes worse, and it is easy to deform. The premise of high-pressure injection molding is that the mold has high precision and fits the mold in place, otherwise the product will be criticized. Especially for parts priced by weight and quantity, when extra working hours are entrusted, the processing factory will produce low-density parts to reduce costs.

Three. Glass fiber reinforcement

The use of high-grade plastics in plastic mold manufacturing can definitely improve the rigidity of plastic products, but it will increase the cost, so the material cost is never increased, and the problem is solved by low-cost plastic reinforcement. Adding glass fiber is a common and mature method. Adding glass fiber can also improve the creep properties of the material.