Manufacturing method of cloth rubber seal for valve assembly

Abstract

The invention relates to a production method of a cloth-insulated rubber sealing part of a valve assembly. The production method comprises the following steps: feeding a layered cloth-insulated rubber composite material into a door-shaped cavity of a lower die of a pre-forming die; fixing the cloth-insulated rubber composite material through a positioning pin which is fixed to the lower die; carrying out compression moulding through a pressing machine under the room temperature, wherein the pressure of the pressing machine is 5 to 7mpa; removing a pre-formed blank from the pre-forming die; positioning the blank into the door-shaped cavity of the lower die of the pre-forming die; fixing the pre-formed blank through the positioning pin fixed to the lower die; performing pressing and vulcanization forming through the pressing machine, wherein the vulcanization is carried out for 15 to 25 minutes at the pressure of 5 to 7mpa and under the temperature of 150 to 160 DEG C; removing the product; cooling the product to reach the room temperature; filling a foam material into an end port of the door-shaped cloth-insulated rubber sealing part; sealing and adhering the end port and an opening in the inner side of the door-shaped cloth-insulated rubber sealing part through adhesive, so as to obtain the cloth-insulated rubber sealing part product of the valve assembly.

Description

technical field [0001] The invention relates to a method for manufacturing a cloth rubber seal, an important part of a valve assembly, in particular, the invention relates to a method for manufacturing a cloth rubber seal for a valve assembly. Background technique [0002] Valve seals are used in low pressure hydraulic and pneumatic systems. In this case, a thick-walled (usually spherical) rubber or cloth rubber diaphragm functions as a locking mechanism. The function is to separate the medium chamber from the transmission chamber and ensure the tightness of the joint between the valve housing and the cover. Since there is no friction couple that is affected by the working medium, and the stagnation zone is completely eliminated, this valve is widely used in aviation, automobiles and other aspects. [0003] The overall shape of the valve seal is a door-shaped seal with arcs, and the cross-sectional shape of the door-shaped outer ring is like a water drop. The valve seal m...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at overcoming the inability to prepare a door-shaped seal with a circular arc transition in the traditional valve cloth rubber parts, and provides a door-shaped seal with a circular arc transition that can reduce joints and is stable and wrinkle-free. In order to ensure the beautiful appearance of the product and reduce the probability of product failure due to damage at the seam, even if the pressure is too high, it can smoothly produce high-quality process methods that meet the specifications

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