Process for depositing an elastomeric or thermosetting bank on a support
AssigneeCefilac
InventorJean Desverchere
Life of this patent
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Abstract
The invention relates to a method and apparatus for manufacturing bands of elastomeric or thermosetting material of the type used in making impervious seals and gaskets. The process consists in molding or injecting at ambient temperature the elastomeric or thermosetting material in the viscous state into a molding cavity on a support which, compared to the material being deposited, has an adherence that is greater than that of the molding cavity. Subsequently, the deposited material is vulcanized or polymerized into the desired band configuration.
Claims12
A process for providing a sealing band or similar shape of vulcanizable elastomeric or polymerizable thermosetting material upon a workpiece support, said material having a Mooney viscosity between 20 and 90 (measured at 100.degree. C.), comprising the steps for:
- A. providing a mold and a workpiece support adjacent said mold which together define a molding cavity, said support having a greater adherence to said material than said mold;
- B. depositing said material into said molding cavity at ambient temperature and a temperature below which curing takes place and in the viscous state and so that substantially no curing takes place while the mold defines a portion of the molding cavity;
- C. separating the mold from the support, said deposited material adhering to said support;
- and
- D. curing the deposited material by heat after separating the mold from the support to form the desired band.
A process for making a gasket with a sealing band upon a gasket substrate, said band of vulcanizable elastomeric or polymerizable thermosetting material, said material having a Mooney viscosity between 20 and 90 (measured at 100.degree. C.), comprising the steps for:
- A. providing a mold and said gasket substrate adjacent said mold which together define a molding cavity, said gasket substrate having a greater adherence to said material than said mold;
- B. depositing said material into said molding cavity at ambient temperature and a temperature below which curing takes place and in the viscous state and so that substantially no curing takes place while the mold defines a portion of the molding cavity;
- C. separating the mold from the gasket substrate, said deposited material adhering to said gasket substrate;
- and
- D. heating the deposited material after separating the mold from the gasket substrate to cure into the desired band.
Dependencies are inferred from the claim text.