Injection molding machine and its melt screw

Abstract

The invention provides an injection molding machine and a glue melting threaded rod thereof. A thread part of the glue melting threaded rod comprises a feeding section and a plasticizing section. The plasticizing section is composed of four different variable-diameter and variable-distance compression sections. The whole glue melting threaded rod is provided with auxiliary external thread screw flights as barriers. A main external threaded groove of the plasticizing section is divided into a solid phase groove and a liquid phase groove, the solid phase groove gets shallower gradually, and the liquid phase groove gets deeper gradually. When plastic enters from the feeding section to the solid phase groove, after the solid phase groove is gently compressed and plasticized, a melt crosses gaps of the auxiliary external thread screw flights to be sheared and plasticized sufficiently, enters the variable-distance large-pitch liquid phase groove, and then is delivered into a storage space of a charging barrel in a small-damp and high-efficiency mode. Meanwhile, a vortex is formed, vortex flowing along the section of the liquid phase groove is generated, the melt is uniformly mixed, heat exchange between the melt and the charging barrel is more sufficient, and the uniform-temperature high-quality melt is generated. The injection molding machine is stable in production process, and both the plasticizing capacity and the melt quality are improved.

Description

technical field [0001] The invention relates to molding equipment, in particular to an injection molding machine and its melt screw. Background technique [0002] At present, the commonly used melt glue screw is the traditional three-stage single-flight screw, the general-purpose variable-pitch screw, the barrier-type high-mixing screw, and the separation-type double-flight screw. [0003] Such as figure 1 As shown, it is a traditional three-section single-flight screw. The three-section single-flight screw includes a threaded part and a connecting part, and the threaded part includes a feed section L1', a compression section L2' and a homogenization section L3'. The feed section L1' is formed by the external thread with a straight root with a depth of H11, the compression section L2 is composed of an external thread with an inclined root, and the homogenizing section L3 is composed of an external thread with a straight root with a depth of H12. Its working principle is: ...

AI Technical Summary

Problems solved by technology

[0010] The present invention proposes an injection molding machine and its melt-glue screw, which solves the problem that the traditional single-thread melt-glue screw and several commonly used or variable-pitch, barrier or separate screws cannot completely solve the problem of production efficiency and plasticizing effect in the prior art. And temperature rise and other properties, and the problem of not being able to obtain excellent comprehensive performance, makes the melt glue screw of the injection molding machine of the present invention have wider adaptability

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