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US 6,524,518 B1Granted
Manufacturing process including extrusion with in-line blow molding
AssigneeCrane Plastics Company LLC
InventorPaul R. Pelfrey
Life of this patent
Estimating the term…
Abstract
The present invention is a unique manufacturing process that includes extruding a product shape through extrusion equipment, then using a blow molding process, preferably in-line, on a portion of the extruded product shape to further shape the product. In one preferred embodiment the product shape is a post and the further shaping of the post results in a decorative end that previously had to be assembled to the post but now is able to be formed in the post as a one-piece product, instead of a two-piece construction.
Claims10
A manufacturing process, comprising:
- extruding a product shape through an extruder;
- placing an end portion of said extruded product shape in a blow mold;
- injecting air into said product shape while having heated the end portion of said product shape that is in said blow mold, resulting in expansion of said material inside said blow mold to take the shape of said blow mold cavity;
- and
- allowing the product shape to cool and releasing the blow mold to provide an extruded fence post having a specially formed end formed by a blow molding process.
2 more elements
A manufacturing process, comprising:
- extruding a product shape through an extruder;
- placing an end portion of said extruded product shape in a blow mold;
- injecting air into said product shape while having heated the end portion of said product shape that is in said blow mold, resulting in expansion of said material inside said blow mold to take the shape of said blow mold cavity;
- and
- allowing the product shape to cool and releasing the blow mold to provide an extruded rail post having a specially formed end formed by a blow molding process.
2 more elements
Dependencies are inferred from the claim text.