Automatic demolding type replaceable injection mold

Abstract

The invention discloses an automatic demolding type replaceable plastic injection mold which comprises a demolding guide rod support (1), a thrust block (2), a first demolding rod (301), a second demolding rod (302), a push rod (4), a first limiting rod (5), a first mold holder (6), a second limiting rod (7), a second mold holder (8), a sprue bush sleeve (9), a first mold (1001) and a second mold (1002), wherein two ends of the push rod (4) are fixedly connected with the thrust block (2) and the first mold holder (6) respectively; the first mold (1001) and the second mold (1002) are respectively arranged on the first mold holder (6) and the second mold holder (8) through screws; a first demolding through hole (1201) and a second demolding through hole (1202) are respectively formed in the upper edge and the lower edge of the first mold (1001). The structure can be suitable for different injection molds, and the injection mold is convenient to replace. With the double limiting rods, the injection mold is precisely positioned and is prevented from moving.

Description

Technical field [0001] The invention relates to the field of injection molds, in particular to an injection mold with replaceable molds and automatic demolding. Background technique [0002] In the prior art, due to the shape of the injection molded product, the injection mold is only used for one product. When the product shape is changed, the injection mold needs to be redesigned, reinstalled, and it is troublesome to disassemble and assemble. One product corresponds to a set of mold components. It even corresponds to a complete set of injection molding machines, which is costly. [0003] At the same time, in the prior art, the injection mold that is automatically demolded is demolded by ejection, that is, the demolding rod is directly used as a mold to eject and demold. [0004] For example, CN202623194 discloses an injection mold demolding structure, which is driven by a hydraulic cylinder, has a compact structure, stable and reliable mechanical action, and is easy to process. H...

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Problems solved by technology

[0004] For example, CN202623194 discloses a demoulding structure for injection molds, which is driven by a hydraulic cylinder, has a compact structure, stable and reliable mechanical action, and is easy to process, but the demoulding of the injection mold is realized through an external independent injection mold demoulding structure, and the cost increases. Inconvenient to use

[0005] CN203496238 discloses an injection mold that is easy to demould. The push tube in the cavity shell is changed to be pushed by the push plate. The injection molding rate is low, and the cost is low, and there are fewer obstacles during demoulding, which is conducive to smooth demoulding. However, the design of the injection mold is complicated. It is only possible to use a variety of product shapes by changing the push tube to the push plate.

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