Inclined guide pillar slide block type secondary demolding mechanism of injection mold

Abstract

The invention relates to an inclined guide pillar slide block type secondary demolding mechanism of an injection mold. The secondary demolding mechanism mainly comprises a mold cavity and a core insert, wherein a core plate is mounted outside the core insert; a stripper plate is arranged on the core plate; a molded product is formed among the mold cavity, the core insert and the stripper plate; convex ribs are arranged at the bottom surface of the product; the stripper plate matches the convex ribs of the product; the core insert and the core plate are mounted on a core fixing plate; a mold feet are mounted below the core fixing plate; lower templates are mounted below the mold foot; an upper ejector plate and a lower ejector plate are arranged between the mold feet; the upper ejector plate is connected with an ejecting pillar, which is connected with the stripper plate after penetrating through the core fixing plate and the core plate; the demolding mechanism is characterized in that an I-shaped groove is formed in the upper ejector plate, a slide block is arranged in the I-shaped groove, the head part of the slide block is made as an inclined surface, an inclined guide rod is connected below the core fixing plate and penetrates through the slide block, an ejector rod is mounted in the core insert, the head part of the ejector rod is in contact with the bottom surface of the product, and an arc surface is made at the bottom of the ejector rod, and the arc surface matches with the inclined surface of the slide block.

Description

Technical field [0001] The invention relates to a secondary demolding mechanism with an inclined guide post sliding block type for an injection mold, which belongs to the field of plastic molds. Background technique [0002] At present, plastic molds are used to produce small round plastic parts, such as lids. The bottom surface of this type of product is generally made of annular ribs or edges. When traditional molds produce this type of product, direct ejector is used to eject Method, that is, the ejector rods on the upper and lower top plates of the mold are driven by the ejector mechanism of the injection molding machine to push the ejector rods on the product. (Because the ribs of this type of product are very small and thin, it is not suitable for adding ejector rods on the ribs to eject ,) Push the product out of the mold. However, because the annular ribs are made on the bottom surface of the product, the annular ribs are embedded in the mold cavity, and the required dem...

AI Technical Summary

Problems solved by technology

However, since the bottom surface of the product is provided with a ring-shaped rib, which is embedded in the mold cavity, the required demoulding force is very large, and the ejector pin is used alone to directly eject the product, which is easy to damage and deform the product, resulting in Product scrap

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