What are the components of the screw head, the function, the main materials and processes? What are

The screw head (the rubber head, the rubber head, the rocket head) has a screw head, a check ring and a meson three-piece sleeve, and is installed at the front end of the screw to generate back pressure when the glue is melted, and has a back-stop effect when the glue is injected. Inject the plasticized melt into the mold. The screw head is made of all-alloy (fully hardened powdered alloy steel), SDK61, SACM645, after quenching, quenching, nitriding, and full hardening. The advantages of Jinyang screw head are precision and durability, and the sealing effect is good. It is suitable for importing precision electric gears such as precision gears, connectors and light guide plates for all-electric precision molding machines.