The reasons for the rebound of ejector pin of Haitian injection molding machine are ejector pin itself, mold, injection process parameters and plastic material.

1, problems of the ejector pin itself: problems such as insufficient elasticity or deformation of the ejector pin spring and surface wear of the ejector pin may lead to insufficient or unstable rebound of the ejector pin.

2. Mold problems: inaccurate mold guidance, internal friction caused by mold cavity wear and other problems may affect the rebound of the ejector pin.

3. Injection molding process parameters: If the parameters such as injection pressure, injection speed and holding time are set improperly, it may affect the springback of the ejector pin.

4. Plastic material problem: The melting temperature, fluidity and other parameters of plastic material are not suitable for injection molding machines or molds, which will also affect the springback of ejector pins.