Multistage Pressing Process For Producing A Moulded Part Such As A Bipolar Plate From A Highly Filled Thermosetting Material
Patent No. EP4200114 (titled "Multistage Pressing Process For Producing A Moulded Part Such As A Bipolar Plate From A Highly Filled Thermosetting Material") was filed by Schunk Kohlenstofftechnik on Oct 9, 2020. The application was issued on Dec 3, 2025.
Patent Summary
A process for producing a fuel cell bipolar plate utilizes a highly filled thermosetting starting material containing at least 70 mass percent graphite or carbon-containing fillers. The method employs a two-stage pressing sequence: first, the material is placed in a prepressing tool, heated to a prepressing temperature, and compressed with a prepressing force to create a preform. Second, the preform is transferred to a finish pressing tool, heated to a finish pressing temperature, and compressed with a finish pressing force to create the finished part. The prepressing temperature is lower than the finish pressing temperature, and the latter is at least as high as the starting material's curing reaction onset temperature, ensuring chemical cross-linking occurs primarily during the final stage.
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Date
Description
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EP4200114
- Application Number
- EP20792941A
- Filing Date
- Oct 9, 2020
- Status
- Granted And Under Opposition
- Oct 31, 2025
- Publication Date
- Dec 3, 2025
- External Links
- Slate, Register , Google Patents