Exhaust and material leakage-proof device for hot-pressing die

Abstract

The invention provides an exhaust and material leakage-proof device for a hot-pressing die. The exhaust and material leakage-proof device is characterized in that a die core top, a die core main body,a die core bottom plate and die core bottom feet are fixedly connected through long bolts, a protective cover is arranged at the bottom of each long bolt, an upper cover plate is arranged at the topof the die core, the size of the upper half portion of the top of the die core is larger than that of the lower half portion of the top of the die core, the size of the lower half portion of the top of the die core is equivalent to that of the upper end of the die core main body, the upper end of the die core main body is larger than that of the lower end of the die core main body, and the die core bottom feet are connected with equipment; and a die core is inserted into an inner cavity of a middle die core, the middle die core is inserted into a base, and the base is connected with the equipment. The exhaust and material leakage-proof device has the advantages that only the top of the die core is replaced when the die core is damaged, and the cost for replacing the whole die core is reduced; the outer diameter of the top of the die core is increased to reduce a gap with the inner cavity of the middle die core so as to prevent material leakage; and the outer diameter of the lower end of the die core main body is reduced to increase the gap with the inner cavity of the middle die core so as to facilitate gas exhausting.

Description

technical field [0001] The invention relates to the field of hot-pressing molds, in particular to a hot-pressing mold exhaust and anti-leakage device. Background technique [0002] At present, in the domestic brake pad manufacturing industry, most of the hot-pressing mold cores are integrated, and the upper and lower outer diameters of the cores are the same. This design has a draft slope at the upper end of the inner cavity of the middle mold core, and the top of the mold core is in line with the inside of the middle mold core. If the gap between the cavities is large, it is easy to leak material; if the gap between the lower end of the mold core and the inner cavity of the middle mold core is small, it is difficult to deflate. The deflation is an important processing parameter when the product is hot-pressed, and it is easy to cause product bubbling, cracks and waste products; the mold is in use During the process, the top of the core is in direct contact with the product ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the domestic brake pad manufacturing industry, most of the hot-pressing mold cores are integrated, and the upper and lower outer diameters of the cores are the same. This design has a draft slope at the upper end of the inner cavity of the middle mold core, and the top of the mold core is in line with the inside of the middle mold core. If the gap between the cavities is large, it is easy to leak material; if the gap between the lower end of the mold core and the inner cavity of the middle mold core is small, it is difficult to deflate. The deflation is an important processing parameter when the product is hot-pressed, and it is easy to cause product bubbling, cracks and waste products; the mold is in use During the process, the top of the mold core is in direct contact with the product and is easily damaged by force

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