Crank arm forming die

Abstract

The crank arm forming mold comprises a heat insulation plate, an upper fixing plate, a hot runner plate, an upper mold plate, a lower mold plate, two lower mold feet and a lower fixing plate which are sequentially and correspondingly arranged from top to bottom, the lower portion of the upper mold plate and a guide sleeve on the lower mold plate are correspondingly positioned through a guide column, and an upper mold core is arranged on the upper mold plate; an upper mold core is oppositely arranged on the upper mold plate, a lower mold core is oppositely arranged on the lower mold plate, an injection molding opening is formed in the heat insulation plate and connected with a main hot runner, the main hot runner is divided into two branch hot runners, the branch hot runners are connected with the middle of a cold runner, and the two ends of the cold runner are connected with a mold cavity defined by the upper mold core and the lower mold core correspondingly; an oil cylinder is arranged on the side edge of the lower die plate, a shaping piece is arranged at the output end of the oil cylinder, and the oil cylinder drives the shaping piece to stretch into the die cavity to assist forming of the crank arm. According to the mold, injection molding of four sets of crank arm products can be completed at the same time, the injection molding efficiency is improved, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of mold processing and manufacturing, in particular to a crank arm forming mold. Background technique [0002] Injection molding is the most common molding method in the production of thermoplastic products. The mold used is a plastic injection mold, referred to as an injection mold. The processing equipment corresponding to the injection mold is a plastic injection machine (also known as an injection molding machine). Injection molding is to heat and melt plastic (usually pellets) in the barrel of the injection molding machine. When it is in a flowing state, under the pressure of the plunger or screw, the molten plastic is compressed and moved forward, and then passes through the front section of the barrel. The nozzle is injected into the closed mold with low temperature at a very fast speed, formed, cooled, solidified in the cavity, and the product is obtained after demoulding. The existing curved arm fo...

AI Technical Summary

Problems solved by technology

Injection molding is to heat and melt plastic (usually pellets) in the barrel of the injection molding machine. When it is in a flowing state, under the pressure of the plunger or screw, the molten plastic is compressed and moved forward, and then passes through the front section of the barrel. The nozzle is injected into the closed mold with low temperature at a very fast speed, formed, cooled, solidified in the cavity, and the product is obtained after demoulding. The existing curved arm forming mold has problems such as complicated forming and bending process and low production efficiency.

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