Once-shaped forming die of air chamber rubber diaphragm and forming process

Abstract

The invention relates to a once-shaped forming die of an air chamber rubber diaphragm and a forming process. The once-shaped forming die of the air chamber rubber diaphragm is applied to a vulcanization forming process of the air chamber rubber diaphragm, and comprises an upper die, a middle die and a lower die; an upper flange corresponding to the air chamber rubber diaphragm in shape is formed at the lower side of the upper die, and an upper forming cavity for forming the upper half part of air chamber rubber diaphragm is arranged at the surface of the upper flange; a middle concave cavity corresponding to the upper flange of the upper die in shape is formed at the upper side of the middle die, a middle flange corresponding to the air chamber rubber diaphragm in shape is arranged at the lower side of the middle die of the die, and the middle concave cavity and the middle flange are mold cores; and a lower concave cavity corresponding to the middle flange of the middle die in shape is arranged at the upper side of the lower die, and a lower forming cavity for forming the lower half part of the air chamber rubber diaphragm is arranged at the surface of the lower concave cavity. The once-shaped forming die of the air chamber rubber diaphragm further comprises a ferrule, pressed and buckled at the outer edge of the upper part of the lower die, for pre-tightening the canvas. Because the upper half part and the lower half part can be formed for one time, when the middle die needs to be removed, the middle die can be directly removed after the die is opened, and the positions of the upper half part and the lower half part are unnecessary to be rearranged, so that the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the production technology of rubber parts, in particular to a one-time shaping mold and molding process for an air chamber rubber diaphragm in an automobile brake system with higher production efficiency. Background technique [0002] like 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] The current air chamber rubber diaphragm production technology, such as the application number 01210777.8, is called the air chamber diaphragm mold, which provides a steam chamber diaphragm mold, including the upper core mold for the first vulcanization, the upper core mold and the ...

AI Technical Summary

Problems solved by technology

However, this kind of mold and production process generally needs to carry out three times of preforming and two times of vulcanization. It is inconvenient to fit the ferrule and the lower mold cavity, and it is necessary to align multiple guide bushes to produce guide posts. Due to the high temperature treatment, some of the guide bushes, guide posts, ferrules, and lower cavity molds will be sintered Phenomenon

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