Method for manufacturing fiber reinforced resin molded article, and manufacturing device thereof
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKen HATTA
Life of this patent
Estimating the term…
Abstract
Provided is a method for manufacturing a fiber reinforced resin molded article capable of effectively increasing the strength of a fiber reinforced resin molded article, such as a high-pressure tank, and such a manufacturing device thereof. With use of a cutting core that is heated to a higher temperature than a mold, the curing of a portion of resin (thermosetting resin) to be cut in a runner is facilitated, and the portion of the resin to be cut in the runner is cut by the cutting core. The heating temperature of the cutting core is higher than the temperature of the mold and lower than the heating temperature in an aftercure step performed after removing the high-pressure tank from the mold.
Claims12
A method for manufacturing a fiber reinforced resin molded article, the method including forming a preform including a fiber layer on an outer surface of a liner, impregnating the fiber layer of the preform with resin, and curing the resin, comprising:
- a step of preparing a mold having a runner for pouring resin into a cavity, the resin including a thermosetting resin, and having a cutting core disposed therein, the cutting core being movable relative to the runner to cut the resin in the runner;
- a step of placing the preform in the cavity;
- a step of pouring resin into the cavity through the runner;
- a step of stopping pouring of the resin into the cavity to cure the resin, and heating the cutting core to a higher temperature than the mold;
- a step of cutting the resin in the runner by moving the cutting core relative to the runner when a viscosity of a portion of the resin in the runner in a position of the cutting core is within a predetermined range;
- and
- a step of demolding the preform while opening the mold after the curing of the resin impregnated into the preform ends.
A device for manufacturing a fiber reinforced resin molded article to form a preform including a fiber layer on an outer surface of a liner, impregnate the fiber layer of the preform with resin, and cure the resin, the device comprising:
- a mold having a runner for pouring resin into a cavity, the resin including a thermosetting resin, and having a cutting core disposed therein, the cutting core being movable relative to the runner to cut the resin in the runner;
- a heating mechanism configured to heat the cutting core;
- a cutting core driving mechanism configured to drive the cutting core;
- a mold driving mechanism configured to drive the mold in a direction to open and close the mold;
- a resin pouring mechanism configured to pour resin into the cavity through the runner;
- and
- a control device configured to control operating states of the heating mechanism, the cutting core driving mechanism, the mold driving mechanism, and the resin pouring mechanism,
- the control device being configured to
- control the mold driving mechanism to place the preform in the cavity;
- control the resin pouring mechanism to pour resin into the cavity through the runner;
- control the resin pouring mechanism to stop pouring of the resin into the cavity to cure the resin, and control the heating mechanism to heat the cutting core to a higher temperature than the mold;
- control the cutting core driving mechanism to cut the resin in the runner by moving the cutting core relative to the runner when a viscosity of a portion of the resin in the runner in a position of the cutting core is within a predetermined range;
- and
- control the mold driving mechanism to demold the preform while opening the mold after the curing of the resin impregnated into the preform ends.
Dependencies are inferred from the claim text.