Just as the ejection forces can cause stress and deflection in the ejection system components, the ejection forces can also stress and deflection in the plastic moldings. To avoid permanent distortion of the plastic moldings, the number,location,and design of the ejection components must be development to apply a low and uniform state of stress across the moldings. If the ejection force is uniformly distributed across many points in the mold cavity,then the molding will be uniformly ejected from the mold without any permanent distortion. If you need help,please contact me,Lisa. And my email is injectionmold2005@163.com    whatsapp/skype:+86 15617940830