A cold-pressing and hot-setting integrated forming method for processing of non-asbestos gasket

By using a cold-press-thermosetting integrated molding method, non-uniform pressing, thermal stress release, and gradient curing are performed on the same mold, solving the efficiency and quality problems in the production of asbestos-free gaskets and realizing the manufacturing of high-precision sealing gaskets with high efficiency, energy saving, and low cost.

CN122165579APending Publication Date: 2026-06-09JIANGSU FURUI SEALING MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU FURUI SEALING MATERIAL CO LTD
Filing Date
2026-01-30
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing asbestos-free gasket production processes are inefficient, costly, and produce uneven product quality and poor precision. Furthermore, it is difficult to achieve synergistic optimization of cold pressing and hot pressing on the same equipment.

Method used

A cold-press-thermosetting integrated molding method is adopted, which involves non-uniform pressing, thermal stress release, and gradient curing on the same mold. The material properties are optimized by thermally conductive modifiers, stress regulators, and interface compatibilizers to achieve self-adjustment and uniform cross-linking of the material.

Benefits of technology

It improved production efficiency, reduced costs, ensured high product consistency and precision, reduced internal stress, and improved sealing performance and service life.

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Abstract

The application discloses a cold-pressing and hot-solidifying integrated forming method for processing of an asbestos-free gasket, which sequentially performs the following steps in the same station of the same mold: filling a mixture containing a heat-conducting modifier and / or a stress control agent into a cavity; performing two-stage controlled non-equilibrium pressing to build a preset stress gradient distribution in a blank; keeping the blank in the mold, slowly heating to 90-120 DEG C and performing heat-induced stress release without external pressure to enable self-adjustment and homogenization of a microstructure of the material; then continuously heating to 140-200 DEG C at a rate of 2-5 DEG C / min, while applying pressure according to a specific gradient to complete solidification; and finally slowly cooling and keeping pressure until pressure release and mold opening. Through integrated continuous forming and active stress control, the blank transfer link of a traditional two-step method process is eliminated, and problems of low efficiency, uneven quality, poor dimensional accuracy and internal stress concentration are systematically solved. The asbestos-free gasket prepared by the method has high consistency, high accuracy and excellent long-term sealing reliability.
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