Hot pressing die without ejection rod traces on surfaces of products

Abstract

The invention discloses a hot pressing die without ejection rod traces on surfaces of products. The hot pressing die comprises a convex die and a concave die and is characterized in that the convex die and the concave die are spliced up and down together through clearance fit; a sealed die cavity is formed between the convex die and the concave die; the concave die adopts a combined structure and comprises side die plate and a bottom die plate; the side die plates are arranged on two sides of the top surface of the bottom die plate and are combined to form a groove; the bottom of the convex die is inserted into the groove to form a sealed die cavity; the convex die is mounted on an upper fixing plate; the bottom die plate is mounted on a lower fixing plate. The hot pressing die without ejection rod traces on surfaces of products adopts a combined die; the die can be removed without an ejection mechanism; the high size accuracy of products can be ensured; the die structure is simplified; the manufacturing difficulty and the manufacturing cost of the die are reduced; the surfaces of the products are free of ejection traces; the later treatment workload is effectively reduced; the attractive appearance and the market competitiveness of the products can be ensured.

Description

technical field [0001] The invention relates to a hot-pressing mold, in particular to a hot-pressing mold without traces of ejector rods on the product surface. Background technique [0002] The production and preparation of molded products is through the curing of raw materials under high temperature and high pressure within a certain period of time in a closed cavity (a closed cavity formed by a gap fit between the upper punch and the lower die or a structure in which the frame is directly pressed). In the traditional production method, due to the influence of demoulding resistance (the friction between the plastic and the molding surface in the demoulding direction of the mold and the tightness formed by the shrinkage of the plastic), only the ejector rod or the ejector plate can be used to force the ejection. Push the product to realize the removal of the product from the material cavity. The ejection structure is composed of six parts, including the middle backing plat...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a hot-pressing mold with no traces of ejector rods on the product surface, and solve the problem that the traditional hot-pressing mold in the current technology uses an ejection system to eject the mold. Pushing out the cured and molded product will leave ejection marks on the surface of the product, and it is easy to cause deformation of the product, which requires high processing equipment and high mold manufacturing costs.

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