The top rod is tortuous, cracked or leaking: The quality of self-denying ejector is better, that is, the processing cost is too high. Today, standard parts are usually used, and the quality is worse. The gap between the ejector pin and the hole is assumed to be too large, and the leakage is present, but it is assumed that the void is too small, and the ejector is swollen and stuck due to an increase in mold temperature at the time of injection. More risky is that sometimes the ejector pin is pulled out and usually breaks at the top and breaks. When the ram is applied, the exposed ejector pin cannot be reset and the die is Washing Machine Mould Manufacturers broken. In order to deal with this problem, the ejector rod is ground from the head, and the cooperation section of 10~15 mm is stored at the front end of the ejector pole, and the base is somewhat grounded by 0.2 mm. After all the ejector pins are installed, it is necessary to strictly check the coordination gap, usually within 0.05~0.08 mm, to ensure that all the ejector arrangements can advance and retreat.