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US 2018/0361629 A1Published application
Thermally Expandable Mandrel Sealers
OwnerMatt Walleninventor
Life of this patent
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Abstract
It is sometimes advantageous to coat or seal the mandrel before laying on, coating, or wrapping the mandrel with composite plastic material. This invention provides improved coating with improved function that is easily removable from the cured product. The effective coating materials are applied directly to the mandrel as a coat or as a film or tape. Thermally expandable coat or film also reduces manufacturing costs for composite plastic products.
Claims10
(canceled)
(canceled)
The method of manufacturing a composite product comprised of steps:
- a. Coating a mandrel with a thermally expandable coating,
- b. Further coating or wrapping said coated mandrel with raw composite plastic,
- c. Placing said coated mandrel of step b into a closed external mold, and
- d. Heating the resulting assembly of step c above the expansion temperature and curing the composite plastic.
1 more element
The method of manufacturing a composite product comprised of steps:
- a. Coating a mandrel with a thermally expandable coating or with a pre-fabricated expandable film/tape,
- b. Further coating said mandrel with a flexible coating or pre-fabricated film/tape,
- c. Coating or wrapping said coated mandrel of step b with raw composite plastic,
- d. Placing said coated or wrapped mandrel of step c. into a closed external mold, and
- e. Heating the resulting assembly of step d above the expansion temperature and curing the composite material.
2 more elements
Dependencies are inferred from the claim text.