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AssigneeTriton Systems, Inc.
InventorsMarvin A. Guiles, Ross Haghighat, Anant Singh, Rochelle Lerner
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The present invention provides new polymer induction bonding technology. Induction heating technologies are utilized to weld, forge, bond or set polymer materials. The invention provides controlled-temperature induction heating of polymeric materials by mixing ferromagnetic particles in the polymer to be heated. Temperature control is obtained by selecting ferromagnetic particles with a specific Curie temperature. The ferromagnetic particles will heat up in an induction field, through hysteresis losses, until they reach their Curie temperature. At that point, heat generation through hysteresis loss ceases. This invention is applicable to bonding thermoplastic materials, wherein only the area to be bonded has ferromagnetic particles in it; bonding of thermoset composites, which have been processed with a layer of thermoplastic material on one side; curing of thermoset adhesives or composite resins; or consolidating thermoplastic composites.
A method of controlled temperature bonding comprising dispersing magnetic particles, selected from a group of ferromagnetic particles consisting of SrFe.sub.12 O.sub.19 and CO.sub.2 Ba.sub.2 Fe.sub.12 O.sub.22 particles, in a first thermoplastic material, applying an alternating induction field to the first thermoplastic material, heating the magnetic particles and thermoplastic material with hysteresis losses from the magnetic particles, flowing the thermoplastic material and bonding the first thermoplastic material with a second material, continuing the applying of the alternating field and ceasing heating of magnetic particles when the magnetic particles reach Curie temperature.
Dependencies are inferred from the claim text.