The screw head is an important part of the injection molding machine to work properly, and in turn the screw head which components consist of?

　　First, the screw head is over apron, a plastic head, meson composed of three parts, which itself is used to seal plastic, so that the screw head is good or bad quality of mixing and plasticizing effect is largely determine the level of quality of the product injection, do not underestimate these three small parts, if they did not deal with the case, the rejection rate of injection products often scary high, after serious downtime had to re-start work.

　　Secondly, over apron can effectively prevent the plastic melt back and reverse leakage, in order to ensure its sealing effect with the use of plastic meson work together, closed structure better able to reach the leak-proof effect. The non-return movement speed is also largely determines the degree of precision injection molding process the finished product. The non-return stroke movement, lamination and rubber seal head off time determines the reaction speed of movement over apron. Therefore, the use of high quality components is particularly necessary.

　　Finally, the screw head must ensure that the assembly is sufficiently smooth surface of the component, not too much plot material.