Injection molded products should be molded and processed through corresponding plastic molds.
After the injection molding product is molded and solidified, it is commonly called demoulding when it is taken out from the cavity or core. Plastic parts are often tightly wrapped around the mold core or trapped within the mold cavity due to molding and shrinkage. After the mold is opened, the mold cannot be automatically demoulded, which is convenient for the demoulding of the injection molded product and prevents the surface from being scratched when the injection molded product is demoulded. In the design of plastic molds, the inner and outer surfaces of injection molded products must have reasonable demoulding angles.
What are the factors that generally affect the demoulding slope of injection molded products?
- The demoulding angle depends on the performance of the injection molded workpiece, the geometry of the product, such as the height or depth of the product, the wall thickness and the surface state of the cavity, such as surface roughness, processing line, etc.
- Hard plastics have a larger angle than soft plastics;
- The shape of the injection molding product is more complicated, or there are many molding holes in the plastic part, which requires a larger demoulding slope;
- If the height of the injection molding product is larger and the hole is deeper, a smaller demoulding slope should be taken;
- The wall thickness of the injection molding product increases, the strength of the inner hole to wrap the core is greater, and the draft angle is also larger.