Patent ID: 8147949
Filing Date: 2012-04-03
Classification: B28B,C04B,G02B,Y10T

Abstract:
1. A mold for molding a premolded ceramics preform into a ceramics molded component of a prescribed shape by pressure-sintering the ceramics preform, comprising: a lower mold section; an upper mold section opposed to said lower mold section; a periphery nonconstraint portion provided between said lower mold section and said upper mold section for allowing deformation of the ceramics preform in the peripheral direction; and a periphery constraint portion provided on at least either one of said upper mold section and said lower mold section for regulating deformation of the ceramics preform in the peripheral direction for molding the periphery of the ceramics preform, wherein a thickness α represents the length of said periphery constraint portion in a pressurization direction, a thickness α3 represents the length of said periphery nonconstraint portion in the pressurization direction and a thickness ratio β represents the ratio α/α3 of the thickness α of said periphery constraint portion with respect to the thickness α3 of said periphery nonconstraint portion, said thickness ratio β is set to be greater than zero and not to exceed 100, and wherein, said periphery nonconstraint portion is configured to allow for constant control over the applied pressure when the ceramics preform is pressurized.