Foaming and expanding-shrinking mold for box body

Abstract

The invention belongs to the technical field of forming of inner containers of refrigerators and particularly relates to a foaming and expanding-shrinking mold for a box body. The mold comprises a base plate and a convex mold body, wherein the convex mold body is formed by combining top plates, side plates and terminal plates, each top plate, each side plate and each terminal plate are of a split type structure, and each side plate and each terminal plate are arranged to do reciprocating motion along the normal so as to transversely expand or shrink the convex mold body; the top plates are fixedly arranged relative to the base plate, and pulling cores are arranged in crevices between the side plates and the top plates to do up-down reciprocating motion; in a foaming process, the side plates expand outwards, and then the pulling cores are level with the tops of the side plates and the top plates; and in a demolding process, the pulling cores move down, so as to form a space for the horizontal shrinkage of the side plates. According to the foaming and expanding-shrinking mold, the expansion and shrinkage of the top plates and the side wall of the mold are simultaneously driven by virtue of the vertical motion of a movable frame, a transmission structure is compact, and the interference is unlikely to be caused in an operation process, so that the foaming quality of the box body is effectively improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of refrigerator liner molding, and in particular relates to a foaming expansion and contraction mold for a box body. Background technique [0003] In the prior art, when designing the box foaming mold of the refrigerator liner, a hanger structure is usually used. Because the box liner is small, the expansion and contraction stroke is large, and the internal structure is easy to interfere. After the hanger runs for a period of time, due to long-term Force deformation, poor stability of the mold, and easy interference between the hanger and the equipment is inflexible, affecting the quality of foaming, and the probability of waste products is high. However, the competition among refrigerator manufacturers is fierce nowadays, and the requirements for the mold industry are becoming more and more stringent, and the structure of the mold is stable. Performance and efficiency make high demands. Contents ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when designing the box foaming mold of the refrigerator liner, a hanger structure is usually used. Because the box liner is small, the expansion and contraction stroke is large, and the internal structure is easy to interfere. After the hanger runs for a period of time, due to long-term Force deformation, poor mold stability, and the hanger a

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