Injection mold forming structure for air seal between plastic piece and injection mold
A technique for injection molds and molding structures, which is applied in the field of gas-tight molding structures between plastic parts and injection molds, to achieve the effects of convenient processing, simple structure, and improved yield and appearance quality
Active Publication Date: 2014-01-08
佛山市顺德区容声塑胶有限公司
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[0012] In order to solve the sealing problem of high-pressure gas between the plastic part and the surface of the injection mold in surface gas-assisted injection molding, the present invention proposes a mold design method, which can realize the effective sealing of high-pressure gas between the plastic part and the surface of the injection mold
[0013] The mold design method that the present invention solves the sealing problem of high-pressure gas between the plastic part and the surface of the injection mold is:
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[0023] See attached Figure 1-2 , which describes a preferred embodiment of an injection mold molding structure for gas sealing between a plastic part and an injection mold according to the present invention. In the surface gas-assisted injection molding process, the position where the various edges of the plastic part intersect with the injection plane of the injection mold is the place that needs to be sealed, such as attached figure 2 The edge of the inner hole and the edge of the outer surface in the mold need to be sealed at the intersection with the injection plane of the injection mold. According to the present invention, projections are provided at the corresponding positions of the above-mentioned intersections on the injection mold, and when the plastic melt flows into the area of these projections, it will quickly solidify and wrap tightly on the projections to ensure that the gas will not leak to plastic parts. The so-called corresponding position is just a ce...
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The utility model relates to an injection mold forming structure for sealing air between a plastic part and an injection mold. Serrated or wavy bulges are arranged in a region on the injection mold corresponding to the edge of the plastic part, and the bulges are continuously and uniformly arranged along the edge to form a bulge ring in the region on the injection mold corresponding to the edge of the plastic part. During injection molding, when a plastic melt for forming the plastic part flows to the bulge ring, the plastic melt can be quickly solidified and tightly wrap the bulge ring, so that air injected between the plastic part and the injection mold can be ensured not to be leaked out of the plastic part.
Description
technical field [0001] The invention relates to a design structure of a plastic injection mold, in particular to a gas-tight molding structure between a plastic part and an injection mold. Background technique [0002] Gas-assisted injection molding technology is an emerging plastic injection molding technology. Its principle is to use high-pressure gas to create a hollow section inside the plastic part, use gas pressure to replace plastic injection pressure, eliminate product sink marks, and complete the injection molding process. Its advantages mainly include: [0003] 1) Solving the problem of sink marks on the surface of the workpiece can greatly improve the surface quality of the workpiece. [0004] 2) Reduce the internal stress of the product, increase the strength and dimensional stability of the product itself, and reduce warping and deformation. [0005] 3) Save raw materials, up to 40% to 50%. [0006] 4) Simplify product and mold design and reduce the difficult...
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IPC IPC(8): B29C45/26
Inventor 张明磊王小新邵振鲁韶磊王启亮
Owner 佛山市顺德区容声塑胶有限公司