Mold assembly

Abstract

The invention discloses a mold assembly which comprises a push plate, a mold plate, an ejector pin bottom plate, an ejector pin panel provided with an ejector pin and a spring sleeve. The ejector pinis further sleeved with a spring, a supporting plate is arranged at the top of the spring sleeve, the ejector pin penetrates through the supporting plate to be connected with the push plate, and a limiting structure for limiting the spring sleeve from moving towards the push plate is arranged between the spring sleeve and the mold plate; a material pulling well is arranged on the push plate, protruding blocks are arranged on the inner side wall of the material pulling well, each protruding block is provided with a holding part, the spring sleeve is additionally arranged to utilize the space ofthe push plate, the problem that the compression space of the spring is insufficient is solved, the compression space of the spring is increased under the condition that the plate thickness and the mold height are not changed, the principle that plastic expands with heat and contracts with cold is utilized, after injection molding is finished, cold materials located at the positions of the holding parts in the material pulling well can form necking openings, and the necking openings shrink when being cooled, so that the necking openings and the holding parts shrink more and more tightly, theholding effect is achieved, static mold waste is brought out, and then the static mold waste is ejected out through the ejector pin and the push plate.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a mold assembly. Background technique [0002] In the mold design, springs are used in almost every pair of molds. When the spring is too long, the compression ratio of the spring becomes a very troublesome problem. After the mold is increased, the size of the injection molding machine is not enough, and a larger injection molding machine must be used. This not only wastes the cost of the mold, but also wastes energy in the injection molding process, which increases energy consumption and emissions; when some customers have their own injection molding machines, the mold is too high because the spring is too long, exceeding the size of the customer's injection molding machine. , the customer needs to purchase a larger injection molding machine, and the cost required at this time will be relatively high. Contents of the invention [0003] Purpose of the present invention: In order...

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Problems solved by technology

[0003] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a mold assembly, adding a spring sleeve to utilize the space of the push plate, which solves the problem of insufficient spring compression space, without changing the plate thickness and In the case of mold height, increase the compression space of the spring

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