Box foam expansion and contraction mold

Abstract

The invention belongs to the technical field of refrigerator liner molding, and in particular relates to a box foam expansion and contraction mold, which includes a bottom plate and a punch body. The punch body is composed of a top plate, a side plate and an end plate. Both the plate and the end plate are of a split structure, and each side plate and end plate are arranged to reciprocate along their respective normal directions, so that the volume of the punch body can expand or shrink laterally, the top plate is fixedly set relative to the bottom plate, and the side plates There is a core-pulling in the gap between the top plate, and the core-pulling reciprocates up and down. When foaming, the side plate expands outward. At this time, the core-pulling is flush with the top of the side plate and the top plate; The core moves downward to make room for the horizontal retraction of the side panels. The invention uses the vertical movement of the movable frame to drive the expansion and contraction of the top plate and the side wall of the mold at the same time, the transmission structure is compact, the interference is not easy to occur during the operation, and the foaming quality of the box body is effectively improved.

Description

technical field [0001] 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 [0002] 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 of the in...

AI Technical Summary

Problems solved by technology

[0002] 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. high demands on performance and efficiency

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