Elbow injection mold

Abstract

The invention provides an elbow injection mold. The elbow injection mold comprises an upper mold base plate, a cavity fixing plate, a core fixing plate, a mold foot cushion block, an ejector pin cover plate, an ejector pin push plate, a lower mold base plate, a core insert, a cavity insert, an elbow core pulling oil cylinder, an oil cylinder stay, a first connecting pin, a small center pull block, a second connecting pin, an arc-shaped sliding block, an arc-shaped guiding block, an elbow core, a straight tube core, a sliding block body, an oblique guide pillar and a sliding block reinforcing support. By the adoption of the elbow injection mold, the defects of the prior art that in the two-section elbow injection molding process, filling is insufficient and short shot is caused are overcome, and the practical production problems that mold cavity pressure is hard to balance, the number of burrs is large, filling is insufficient, wall thickness uniformity is hard to guarantee, and efficiency is low are solved; automatic zero-defect molding is achieved with the simple mechanism, and product molding quality is effectively guaranteed; the structural design is reasonable, the structure is compact, and working is stable.

Description

technical field [0001] The invention relates to the field of injection mold mechanism design, in particular to an injection mold for bent pipes. Background technique [0002] Such as figure 1 As shown, the injection molding of the double-section elbow is limited by the characteristics of the product shape. The existing mold has the following problems in actual production: First, it is difficult to determine the position of the gate, and it is easy to find deviations, resulting in insufficient filling and underfilling of the product during injection molding. Injection and other defects, another problem is that it is difficult to ensure the closure and sealing of the mold cavity, there are many injection molding flashes, and it is difficult to ensure uniform wall thickness; the third is that the mold is produced in a single cavity mold, and the efficiency is low; therefore, a special demoulding core must be designed. Mechanism and mold structure to complete the automatic inje...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, when the injection molding of the double-section elbow is limited by the characteristics of the product shape, the existing molds have the following problems in actual production: First, it is difficult to determine the position of the gate, and it is easy to find deviations, resulting in insufficient filling and underfilling of the product during injection molding. Injection and other defects, another problem is that it is difficult to ensure the closure and sealing of the mold cavity, there are more flashes in injection molding, and it is difficult to ensure uniform wall thickness; the third is that the mold is produced in a single cavity mold, and the efficiency is low; therefore, a special demoulding core must be designed. Mechanism and mold structure to complete the automatic injection molding production of products

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