Water soluble core for pressure die casting and process for maki

Details Water soluble core for pressure die casting and process for maki Water soluble core for pressure die casting and process for maki

1974-03-27

1976-06-15

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 66, 264221, C04b 3564, B29c 102

Patent

active

039638189

ABSTRACT:
Process for producing a water-soluble core for pressure die casting by pre-drying a granular water-soluble salt having grain size of less than about 1000 microns so that the moisture content thereof becomes less than 1%, molding under compression the granular water-soluble salt into a desired shape and volume at a pressure of between about 1.5-4 tons/cm..sup.2, and if necessary, sintering the molded salt at a temperature of between about 100.degree.-300.degree.C. The core for pressure die casting acting as a cavity former within a casting and substantially consisting of a water-soluble salt and having a compressive strength of between about 800-1480 kg./cm..sup.2, a bending strength of between about 200-370 kg./cm..sup.2, and a density of between 2.05-2.12.

REFERENCES:
patent: 3356129 (1967-12-01), Anderko
Kingery, Introduction to Ceramics, pp. 39-47, p. 622 (1960).

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