Hot forming mold and method of manufacturing the same

Details Hot forming mold and method of manufacturing the same Hot forming mold and method of manufacturing the same

1990-10-05

1992-12-15

Simmons, David A.

Static molds

Container-type molding device

Of named component

106 3827, 106 383, 106 389, 501123, 501133, B28B 734

Patent

active

051714582

ABSTRACT:
This invention provides a hot forming mold made of xonotlite group materials such as xonotlite, or wollastonite made therefrom which are known as a heat-resisting materials. By hot pressing these materials to high bulk density e.g., 0.6 to 2.20, a mold suitable for use in hot forming, having increased bending strength and hardness can be efficiently made. Such molds are made by filter pressing an aqueous slurry of xonotlite, then drying the pressed product to remove moisture at a temperature less than about 700.degree. C., and then cutting out the mold for use in molding plastic, glass and the like. By heat treating this mold product at a temperature of about 700.degree. to 1200.degree. C. the mold so produced can be subjected to machining and can be used as a mold for superplastic forming aluminum, titanium and the like.

REFERENCES:
patent: 3690366 (1972-09-01), Schwartz
patent: 3802891 (1974-04-01), Horton
patent: 3959212 (1976-05-01), Rockett et al.
patent: 4966629 (1990-10-01), Tsukiyama et al.

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