Nissan Motor Company Limited

Katsuhiro Usui

Katsumi Morohoshi

Naoki Arai

Yuji Hamaguchi

Takafumi Fukumoto

Ayako Takano

Akihisa Otsuki

Takeshi Nagao

A method for molding a composite material and a device for molding a composite material are provided which are able to suppress the occurrence of voids in a composite material and improve the mechanical characteristics and appearance quality of the composite material. In the method for molding a composite material (), a seal region () including a cavity () in which a reinforcing base material () is disposed and an outer peripheral region () that communicates with an outer periphery of the cavity is air-tightly sealed by means of a first sealing member (). Then, an operation of suctioning a gas from the outer peripheral region to evacuate the gas in the seal region is started, and a resin () is injected into a part of the cavity. Next, a mold () is clamped to provide a liquid-tight seal between the cavity and the outer peripheral region by means of a second sealing member () while pressing the resin to fill the cavity with the resin. After that, the operation of suctioning the gas from the outer peripheral region is stopped.

Method for molding composite material and device for molding composite material

A surface treatment device includes a vacuum blast head, an air curtain-forming unit and an auxiliary air injection unit. The vacuum blast head includes an injection nozzle and a suction hole. The injection nozzle injects a polishing agent used for blast treatment on a surface of a material to be treated. The suction hole sucks up the injected polishing agent with suction air. The air curtain-forming unit injects air toward the surface of the material to be treated to form an air curtain that surrounds the injected polishing agent. The auxiliary air injection unit injects auxiliary air between the air curtain and the suction air toward the material to be treated at a lower pressure than the air that forms the air curtain.

Surface treatment device and surface treatment method

A composite material molding method is provided for forming a composite material. The molding includes disposing a reinforcing base material in a cavity inside an openable and closable mold, injecting resin into the cavity in a state in which a clamping pressure is exerted on the mold and curing the resin. When injecting the resin into the cavity, the injection pressure of the resin is adjusted between a first pressure that is higher than the clamping pressure and a second pressure that is lower than the clamping pressure, and the injection pressure of the resin is lowered from the pressure that is higher than the clamping pressure to the pressure that is lower than the clamping pressure at least once. The resin is thereby injected such that the pressure inside the cavity does not exceed the clamping pressure from the start of injection to the end of injection of the resin.

Composite-material molding method and molding device

A composite material is formed by irradiating a bonding position on a surface of the composite material with a laser to cause a reinforcing base member of the composite material, that is impregnated with a resin and onto which a bonding agent is applied, to be exposed and fluffed.

Method for modifying surface of composite material, method for bonding composite material, composite material, and bonded structure

A composite material molding method is provided for forming a composite material. The molding includes disposing carbon fiber in a cavity inside an openable and closable mold, injecting resin into the cavity in a state in which a clamping pressure is exerted on the mold and curing the resin. When a threshold value of the pressure inside the cavity is set to a pressure that is lower than the clamping pressure and the resin is injected into the cavity while exerting an injection pressure that is equal to or greater than the clamping pressure on the resin until the pressure inside the cavity reaches the threshold value. Then, after the pressure inside the cavity has reached the threshold value, the inside of the cavity is suctioned.

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Kanagawa, Japan

Katsuhiro Usui