Screw rod assembly for injection molding machine and screw rod production process

Abstract

The invention discloses a screw rod assembly for an injection molding machine and a screw rod production process. The screw rod production process comprises the following steps of S1, mixing of a material, wherein the material comprises, by weight, 15-30 parts of molybdenum carbide, 10-30 parts of tungsten carbide, 3-17 parts of chromium carbide, 5-20 parts of nickel, 2-10 parts of manganese, 40-60 parts of iron, 0.1-0.7 part of copper, 5-20 parts of iron boride, 0.2-0.4 part of silicon, 2-10 parts of modified phenolic resin adhesives and 5-20 parts of aluminum; and S2, mold manufacturing, specifically, selecting a pipe with the corresponding length according to the length of an alloy screw rod to be manufactured and manufacturing the pipe into a mold. The screw rod manufactured by addingthe molybdenum carbide and the like to the material is more resistant to wear and corrosion and longer in service life. Through two or three times of normalizing treatment, grains in the screw rod arerefined, carbides are distributed more uniformly, the hardness is improved, the machinability is improved, internal stress of the material is removed, deformation and cracking are prevented, and accordingly, the service life of the screw rod is prolonged.

Description

technical field [0001] The present invention relates to the technical field related to injection molding machines, and more specifically, relates to a production process of a screw used for a screw assembly of an injection molding machine. Background technique [0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding molds. Divided into vertical, horizontal, all-electric. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it inject and fill the mold cavity. The screw, the check ring gasket, the check ring and the screw head form the screw assembly of the injection molding machine, and the screw is an important part. Now Some screws have poor corrosion resistance and stress resistance, are easy to wear, and are prone to problems in the ...

AI Technical Summary

Problems solved by technology

The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it inject and fill the mold cavity. The screw, the check ring gasket, the check ring and the screw head form the screw assembly of the injection molding machine, and the screw is an important part. Now Some screws have poor corrosion resistance and stress resistance, are easy to wear, and are prone to problems in the working process, which affects the production progress. Therefore, we propose a screw production process for screw components for injection molding machines.

At present, the demand for polyvinyl chloride (PVC) injection molding products is gradually increasing. However, the conventional full-gradient screw used to form PVC injection molding products usually has a mediocre plasticizing effect. Modification and compounding of PVC to change the overall performance, but the defects of the screw itself in the PVC injection molding screw, such as: the heating process of the screw of the injection molding machine is continuously improved, and the traditional heating of the resistance wire screw has become an energy-saving and environmentally friendly machine for the injection molding machine. The bottleneck of equipment development. The slippage of the screw of the injection molding machine will cause material degradation. The screw is a key part of the injection molding machine and the extruder. (Such as carburizing, nitriding, etc.) There are various defects, which cannot effectively improve the performance of the screw