Coatings and Films as Mandrel Sealer
OwnerMatt Walleninventor
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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.
Claims4
The method of manufacturing a composite product comprised of the steps of coating a mandrel with neoprene prior to laying on raw composite plastic for subsequent curing.
The method of manufacturing a composite product comprised of the following steps:
- a. Coating a mandrel with a thermally expandable coating or film/tape,
- b. Coating or wrapping the mandrel with raw composite plastic,
- c. Placing the mandrel coated or wrapped with raw composite plastic into a closed external mold, and
- d. Heating the assembly above the expansion temperature and curing the composite material.
The method of manufacturing a composite product comprised of the steps:
- a. Coating a mandrel with a thermally expandable coating or with a pre-fabricated expandable film/tape,
- b. Further coating the mandrel with a flexible coating or pre-fabricated film/tape,
- c. Coating or wrapping the mandrel with raw composite plastic,
- d. Placing the coated or wrapped mandrel of step c. into a closed external mold, and
- e. Heating the assembly above the expansion temperature and curing the composite material.
Dependencies are inferred from the claim text.