Positioning mould

Abstract

The invention discloses a positioning mould which comprises an upper mould and a lower mould; the upper mould and the lower mould are respectively connected with an upper hot plate and a lower hot plate; the upper mould and the lower mould are assembled to form a shape of an automobile brake gas chamber rubber diaphragm, wherein the upper mould is a convex mould, and the lower mould is a concave mould; a mould fixing ring which presses the edge of a rubber diaphragm blank is arranged in the upper mould; the mould fixing ring is connected on the inner side of the upper mould through a positioning bolt, and can displace for a certain distance on the positioning bolt; and the lower mould is provided with a nail screw hole corresponding to the positioning bolt so that the positioning bolt drops into a positioning hole when the mould is assembled. The positioning mould has the beneficial effects that a positioning device is added above the mould, and the device can automatically press a semi-finished product when the mould is opened and closed up and down to exhaust so as to prevent the periphery from flying up (shrinking). Therefore, the semi-finished product positioning is accurate and stable, and the device positions with reasonable balance when the mould is designed, so that the pass rate of the product is improved by 15 percent, the yield is increased by 10 percent, and the production cost is reduced by 8 percent.

Description

technical field [0001] The invention relates to a positioning mold, in particular to a mold for producing rubber diaphragms of automobile brake air chambers. Background technique [0002] The rubber diaphragm of the automobile brake air chamber is a very critical component in the spring brake assembly. Its function is to convert air energy into kinetic energy to ensure the deceleration and parking of the automobile. Therefore, there are very strict industry production requirements for this product. Commonly used molds for the production of this product are prone to misalignment and displacement of the blank of the rubber diaphragm during the clamping process of the upper mold and the lower mold, especially because the edge part will shrink inward with the pressing of the die, and defective products rate is relatively high, and there is currently no better way to solve this problem. [0003] Because this product is a cloth product, the traditional vulcanization process is t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a positioning mold to solve the problem of misalignment and displacement of the blank of the rubber diaphragm in the production process of the rubber diaphragm of the automobile brake air chamber, especially because the edge part will shrink inward with the pressing of the die , resulting in a high rate of defective products

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