A gate-type secondary injection mold for large-angle double-material products

Abstract

The invention relates to a double-material product injection mold, in particular to a wide-angle double-material product gate type secondary injection mold. The wide-angle double-material product gate type secondary injection mold comprises a panel, a hot runner plate, a front mold main insert, a front template, a rear mold main insert and a rear template and is characterized by further comprising a first knife switch, a second knife switch, a first knife switch fixing plate, a second connecting rod, a second knife switch fixing plate, a limit screw and an oil cylinder for driving the second knife switch fixing plate to vertically move; a first chute is formed in the first knife switch, and the second knife switch can be arranged in the first chute in a sliding way; the bottom of the second connecting rod is fixedly connected with the second knife switch fixing plate, and the top of the second connecting rod is in contact with the second knife switch and sides relative to the second knife switch. The double-material product injection mold has the advantages that the difference between adjacent sealant surface angles of an injection molding product is large; the secondary injection molding can be finished without mold opening, the forming period is short, and the single injection molding cost is low; no material overflow occurs at the material lap joint part, the wall thickness of the product is uniform and undistorted, and the surface quality is high.

Description

technical field [0001] The invention relates to a double-material product injection mold, in particular to a large-angle double-material product gate-type secondary injection mold. Background technique [0002] Two-color molding has been widely used in all plastic fields, and the requirements for two-color molds are getting higher and higher. At present, there are three main structures of two-color injection molds: rotary type, push-pull type and gate type. The advantages and disadvantages of these three structures are compared as follows: [0003] Production efficiency: the rotary mold has the highest production efficiency, the gate type is slightly less efficient, and the push-pull type has the lowest production efficiency; [0004] Manufacturing cost: Both the rotary mold and the push-pull mold require two cavities, so the manufacturing cost is much higher than that of the gate type; [0005] Product quality: The rotary and push-pull structures need to open the mold onc...

AI Technical Summary

Problems solved by technology

However, the inclination angle of the sealing surface is large and the products are different. The gate structure will cause product distortion at the gate, and even cannot be sealed normally.

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