External pulling type demolding structure of injection mold

Abstract

The invention relates to an injection mold structure, in particular to an external pulling type demolding structure of an injection mold with an inverted buckle arranged on the inner wall of an injection product. The external pulling type demolding structure of the injection mold comprises a front mold, a back mold, a back mold insert on the back mold used for shaping the inverted buckle structureof the product and a slide block arranged on the back mold, wherein an inclined guide rod used for causing the slide block to move laterally is arranged on the front mold. The demolding structure ischaracterized in that a hook block that can be inserted into the inner cavity of the product is arranged on the slide block and a containing cavity that can contain the hook block on the slide block is arranged on the back mold insert. The demolding structure replaces an inclined top demolding structure with a slide block demolding structure. With high strength of the slide block, the demolding structure is not easy to be distorted and damaged when being pressed during injection process, thus being capable of meeting requirements of long-term production and ensuring stable size of products andhigh rate of finished products.

Description

technical field [0001] The invention relates to an injection mold structure, in particular to an external pulling type demoulding structure of an injection mold with an undercut on the inner wall of an injection product. Background technique [0002] The inclined top demoulding mechanism is the simplest and most commonly used form of the demoulding mechanism in the injection mold at present. It is simple to manufacture and easy to replace. For products with complex structures, especially those with undercuts on the inner wall, they are usually ejected by an inclined top ejector mechanism. [0003] But for figure 1 As shown in the product, the side 1A is relatively long, and the internal space is very small. If the undercut 2A on the inner wall is still demoulded with a slanted roof, the designed slanted roof 3A is also slender due to the limitation of the internal space of the product. ,like figure 2 As shown, the slender slanted top has disadvantages such as easy defor...

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Problems solved by technology

[0003] but for figure 1 As shown in the product, the side 1A is relatively long, and the internal space is very small. If the undercut 2A on the inner wall is still demoulded with a slanted roof, the designed slanted roof 3A is also slender due to the limitation of the internal space of the product. ,like figure 2 As shown, the slender inclined roof has disadvantages such as easy deformation and bending, which will eventually lead to unstable product size, poor product molding quality, many defective products, and low production efficiency.

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