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US 10,611,057 B2Granted
Process of producing fiber-reinforced plastic
AssigneeToray Industries, Inc.
InventorsIchiro Taketa, Hiroaki Matsutani, Nobuyuki Arai, Narumichi Sato
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Abstract
A process is capable of producing a high-quality fiber-reinforced plastic with good yield in a short molding cycle time despite being atmospheric pressure molding. The process characterized uses local contact heating to give different temperature conditions to produce a fiber-reinforced plastic by atmospheric pressure molding from a fiber-reinforced material which contains a reinforcing fiber impregnated with a thermosetting resin composition.
Claims14
A process of producing a fiber-reinforced plastic comprising:
- placing a fiber-reinforced material containing a reinforcing fiber impregnated with a thermosetting resin composition between a single-sided mold and a bagging film to form a closed space created by the single-sided mold and the bagging film;
- sucking the closed space with a vacuum pump to pressurize the fiber-reinforced material by utilizing a pressure difference from an atmospheric pressure;
- locally heating the fiber-reinforced material with a contact heat source under a temperature condition different from an atmosphere temperature in a state where the fiber-reinforced material is pressurized;
- and
- curing the fiber-reinforced material to mold the fiber-reinforced plastic,
- wherein the temperature condition is controlled to eliminate warpage of the obtained fiber-reinforced plastic by predicting strain of the fiber-reinforced material during molding by solving a balance of forces considering the thermal contraction and the curing contraction as well as the viscoelastic characteristics of the resin calculated based on a distribution of temperatures and degrees of cure predicted by the heat transfer analysis that includes cure kinetics parameters of the thermosetting resin.
3 more elements
A process of producing a fiber-reinforced plastic comprising:
- placing a fiber-reinforced material containing a reinforcing fiber impregnated with a thermosetting resin composition between a single-sided mold and a bagging film to form a closed space created by the single-sided mold and the bagging film;
- sucking the closed space with a vacuum pump to pressurize the fiber-reinforced material by utilizing a pressure difference from an atmospheric pressure;
- locally heating the fiber-reinforced material by using a contact heat source under a temperature condition different from an atmosphere temperature in a state wherein the fiber-reinforced material is pressurized and the temperature condition given by the contact heat source is continuously changed;
- and
- curing the fiber-reinforced material to mold the fiber-reinforced plastic.
2 more elements
Dependencies are inferred from the claim text.