US Patent No. 10,219,329

METHODS FOR FABRICATION OF THERMOPLASTIC COMPONENTS


Patent No. 10,219,329
Issue Date February 26, 2019
Title Methods For Fabrication Of Thermoplastic Components
Inventorship Marc R. Matsen, Seattle, WA (US)
Mark A. Negley, Bellevue, WA (US)
Assignee The Boeing Company, Chicago, IL (US)

Claim of US Patent No. 10,219,329

1. A method of fabricating a thermoplastic component using inductive heating, said method comprising:forming a workpiece comprising the thermoplastic component and a susceptor;
placing the thermoplastic component and the susceptor between a top tool and a bottom tool, wherein the top tool and the bottom tool comprise fused silica or stainless steel;
positioning a plurality of induction heating coils to define a process area for passage of the thermoplastic component, wherein the plurality of induction heating coils comprises a first set of coils and a second set of coils, wherein individual coils of the second set of coils are positioned between a pair of individual coils of the first set of coils;
configuring a first power supply to provide the first set of coils with electricity for a first predetermined period of time while a second power supply is not supplying electricity to the second set of coils;
configuring the second power supply to provide the second set of coils with electricity for a second predetermined period of time when the first power supply is not providing electricity to the first set of coils;
controlling a supply of electricity provided to the plurality of induction heating coils to intermittently activate the first set of coils and the second set of coils by alternating the supply of electricity between the first power supply and the second power supply so that the first set of coils is provided with electricity when electricity is not provided to the second set of coils, and the second set of coils is provided with electricity when electricity is not provided to the first set of coils wherein the process area extends through the first set of coils and the second set of coils, wherein the first power supply and the second power supply are configured to alternately power the first set of coils and the second set of coils such that the first set of coils and the second set of coils are energized at different times to reduce electromagnetic interference between individual coils of the first set of coils and the second set of coils; and
passing the workpiece through the process area, wherein the process area extends through the first set of coils and the second set of coils.