Injection molding mould for long-edge skew stud long curved sheet product

Abstract

The invention discloses an injection molding mould for a long-edge skew stud long curved sheet product. The injection molding mould comprises a fixed mould body (1), a movable mould body (2), an ejecting mechanism (3) and an oil cylinder (4). According to the injection molding mould, a mould cavity and a mould core are obliquely arranged, and the ejecting mechanism is obliquely arranged on the lower inner portion of a movable mould support plate in the axis direction of a skew stud and driven by the oil cylinder to work; through the technical scheme that the mould cavity is obliquely arranged so as to decrease the longitudinal depth of the mould cavity, the defects that in the prior art, the comprehensive cost is high, and the qualification rate of the product is low are overcome, and manufacture and application of the injection molding mould for the long-edge skew stud long curved sheet product achieve the purposes of reducing the comprehensive cost and increasing the qualification rate of the product.

Description

technical field [0001] The invention relates to an injection mold, in particular to an injection mold for injection-molding a stud obliquely intersecting with a long curved product along the long side direction. Background technique [0002] Noun description: [0003] Long curved products are injection molded products in the shape of strips, curved surfaces, and sheets, and long curved products are usually light and small weight products; [0004] The stud is an injection molded product used to connect with other objects through screws, and has a cylindrical pile-shaped structure with a circular blind hole in the center; the stud that is orthogonal to the back shape of the injection molded product is called an orthogonal stud; and the back of the injection molded product The studs with oblique intersecting surfaces are called oblique studs; the oblique studs intersecting the product along the long side direction of the product are called long side oblique studs; the long cu...

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Problems solved by technology

[0009] 1. The depth and narrowness of the cavity will bring many difficulties to the manufacturing and processing of the mold; the cutting tool for processing the deep and narrow cavity must be thin and long, and the slender cutting tool will produce an elastic knife when cutting, and the amount of knife and the feed rate each time The feeding speed is small and slow, so the processing efficiency is low, resulting in long mold manufacturing and processing period and high cost; in addition, because the model cavity surrounded by the deep and narrow cavity and the corresponding dynamic model core is deep, the gate is the deepest from the cavity. The location is too far away, which makes it difficult to balance the temperature of the cavity during injection molding, making it difficult to pre-set the position and density of the cooling water channel. Usually, multiple simulated mold trials, adding new water channels and blocking old water channels are used to gradually approach the actual demand. , such processing also makes the manufacturing period of the mold long and the cost high;

[0010] 2. It is difficult to guarantee the processing accuracy of deep cavity, especially for the processing of injection molds for high-gloss and high-precision exterior decoration products of automobile lights.

[0011] 3. The opening and closing distance is long. In the mold application, an injection molding machine with a large opening and closing stroke and a large grammage specification must be used for injection molding production; a large grammage injection molding machine consumes a lot of energy and high operating costs. To produce small-weight long curved products, large horse-drawn carts, the production cost is high; in addition, it is difficult for large-gram injection molding machines to control the injection volume of small-gram weight, and large-gram injection molding machines are used to produce small-gram long curved products sheet products, resulting in a high reject rate of defective products and a low pass rate; therefore, the prior art has the problems and deficiencies of high comprehensive cost and low product pass rate

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