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US 6,743,511 B2Granted
Method of manufacturing a PTFE preform using thermal fusion
AssigneeColtec Industrial Products LLC
InventorsRoxanne Dittrich, Taggart William Albert Mills
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Abstract
This invention relates to methods for manufacturing large PTFE parts by compression molding followed by sintering. The method comprises layering modified and unmodified PTFE in a mold, and compressing the layers to form a preform part. Once the preform parts are formed, they are assembled such that the areas of preform parts which are to be bonded together are the modified PTFE sections. The parts are then sintered and the modified PTFE sections bond together creating a strong, durable, bond.
Claims10
A method for manufacturing a PTFE article, comprising;
- (a) manufacturing at least two preform parts according to a method comprising the steps of;
- disposing a first layer of a modified PTFE resin into a mold cavity;
- exposing the first layer to a first pressure;
- disposing a second layer of an unmodified PTFE resin into the mold cavity;
- exposing the first and second layers to a second pressure;
- (b) placing the at least two preform parts adjacent to one another such that one of the layers of modified resin of one part is contacting one of the layers of modified resin of another part;
- and
- (c) sintering the at least two preform parts together to form a single article.
5 more elements
Dependencies are inferred from the claim text.