Mould, mould base and process for one-time forming of canvas of air chamber rubber diaphragms

Abstract

The invention discloses a mould, a mould base and a process for one-time forming of canvas of air chamber rubber diaphragms. The mould comprises an upper mould and a lower mould, an upper flange corresponding to an air chamber rubber diaphragm in shape is formed on the lower side of the upper mould, and a lower concave cavity corresponding to the upper flange of the upper mould in shape is formed on the upper side of the lower mould. The mould is characterized by further comprising a sleeve ring which can be used for pre-tightening of canvas, and the sleeve ring can be pressed and fastened to the upper outer edge of the lower mould. The sleeve ring is added for pre-tightening of the canvas, so that the requirement on canvas face in forming is low. The canvas can be square selectively, and tailoring is facilitated while tailoring speed can be increased. In addition, the problem of centering in one-time forming of the canvas is well solved, and problems of small inclination and exposure of the canvas are further solved.

Description

technical field [0001] The invention relates to the production technology of rubber parts, in particular to a one-time forming mold, mold base and process for canvas shaping of an air chamber rubber diaphragm in an automobile brake system with higher production efficiency. Background technique [0002] Such as figure 1 As shown, the rubber diaphragm of the air chamber is a rubber product with a canvas sandwiched in the middle. It is used in the brake system of large vehicles and installed in the automotive device. The pressure of the air chamber is increased through the displacement of the diaphragm to open the brake pads and hold the wheel tightly. It has a braking effect and is the core part of large trucks. [0003] Such as figure 2 As shown, it is a processing schematic diagram of the current air chamber rubber diaphragm one-time molding process, which includes: an upper mold 1 and a lower mold 3; an upper flange 11 corresponding to the shape of the air chamber rubber...

AI Technical Summary

Problems solved by technology

[0004] This one-time molding process has high requirements on the thickness and dimensional accuracy of the semi-finished film, and the process control is difficult. It can only produce products with a slope of 25-30 degrees and a depth of about 40mm, and the defect of the exposed canvas at the R angle is relatively high, so it cannot be very Good Control Canvas Centered Position

Once the position of the product canvas is deviated, after the product has completed the fatigue test for 1 million times, the inner wall of the product has delamination phenomenon

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