Method for reducing abrasion between punch and die sprue bush

Abstract

The invention relates to a method for reducing abrasion between a punch and a die sprue bush, which comprises the following steps of: setting a cooling water channel of the die sprue bush into a spiral water channel, and simultaneously increasing the width and depth of the cooling water channel; and maintaining the distance between a water inlet copper pipe of an injection rod and the bottom of an inner bore of the punch to be L so as to remove a stagnant water phenomenon. Compared with the prior art, the method has the advantages that: the service life of the conventional die sprue bush is only ten thousand times, and the present service life is more than eighty thousand times; and the service life of the punch is improved to 30,000 from 1,500 times, so the economical benefit of the enterprises is greatly improved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method for reducing wear of a punch and a mold sprue sleeve. Background technique [0002] During the production process, the punch reciprocates in the sprue sleeve of the mold, about 2000 times a day and is in a high temperature state, so the wear is serious, and it needs to be replaced once a day on average. [0003] After inspection, it was found that the design of the sprue sleeve was unreasonable. According to the principle of thermal expansion and contraction, the inner diameter of the sprue sleeve of the mold was relatively reduced when it was thermally expanded, resulting in the tight fit between the sprue sleeve and the punch, resulting in serious wear. [0004] In addition, there are certain defects in the cooling of the shooting rod. After inspection, the cooling copper pipe of the shooting rod does not extend to the bottom of the punch, and there is stagnant ...

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Problems solved by technology

[0003] After inspection, it was found that the design of the sprue bushing was unreasonable. According to the principle of thermal expansion and contraction, the inner diameter of the sprue bushing of the mold was relatively reduced when it was thermally expanded, resulting in the tight fit between the sprue bushing and the punch, resulting in serious wear.

[0004] In addition, there are certain defects in the cooling of the shooting rod. After inspection, the cooling copper pipe of the shooting rod does not extend to the bottom of the punch, and there is stagnant water in the circulating cooling water, which leads to poor cooling effect of the punch, and also causes damage to the punch and mold gate. Severely worn

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