Hot isostatic pressing device

A hot isostatic pressing device for performing isostatic pressing processing for a workpiece by means of pressure-medium gas, comprising:

• a high-pressure container including an inner peripheral surface extending along an upper-to-lower direction, a body internal space defined by the inner peripheral surface being formed inside the high-pressure container;
• an inner casing arranged in the body internal space and including a gas-impermeable inner peripheral wall portion extending along the upper-to-lower direction to surround a hot zone for pressing the workpiece, an inner opening allowing permeation of the pressure-medium gas opening at an upper portion of the inner casing;
• a gas-impermeable heat insulating body arranged to surround the inner casing in the body internal space, the heat insulating body having a heat insulating body peripheral wall portion extending along the upper-to-lower direction to surround the inner peripheral wall portion and a heat insulating body upper wall portion connected to the heat insulating body peripheral wall portion to close an upper portion of the heat insulating body peripheral wall portion and arranged above the inner opening, a pressure-medium gas passage being formed between the heat insulating body peripheral wall portion and the inner peripheral wall portion;
• an outer casing arranged to surround the heat insulating body in the body internal space, the outer casing including a gas-impermeable outer peripheral wall portion extending along the upper-to-lower direction to surround the heat insulating body peripheral wall portion and an outer opening allowing permeation of the pressure-medium gas opening at an upper portion of the outer casing, a pressure-medium gas passage being formed between the heat insulating body peripheral wall portion and the gas-impermeable outer peripheral wall portion;
• a heating unit arranged in the hot zone to generate heat;
• a bottom wall portion including a support portion supporting a lower end portion of the outer peripheral wall portion, a lower end portion of the inner peripheral wall portion, and a lower end portion of the heat insulating body peripheral wall portion and a mount portion defining a lower portion of the hot zone and having an upper portion allowing mounting of the workpiece and sealing of the hot zone from below;
• multiple communication pipes blocked from a space between the inner peripheral wall portion and the heat insulating body peripheral wall portion and each forming a pressure-medium gas passage penetrating the heat insulating body peripheral wall portion to allow a space between the heat insulating body peripheral wall portion and the outer peripheral wall portion and a lower end portion of the hot zone to communicate with each other;
• multiple introduction pipes allowing a lower portion of the space between the inner peripheral wall portion and the heat insulating body peripheral wall portion and a portion of the body internal space below the bottom wall portion to communicate with each other;
• and
• a gas flow generator arranged below the bottom wall portion in the body internal space and configured to generate a pressure-medium gas flow flowing into the multiple introduction pipes upon pressing processing for performing the isostatic pressing processing for the workpiece mounted on the mount portion.