Method of manufacturing dry-pressed molded articles

Details Method of manufacturing dry-pressed molded articles Method of manufacturing dry-pressed molded articles

1981-01-12

1984-09-25

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Bulk deposition of particles by differential fluid pressure

264121, B29J 500

Patent

active

044735260

ABSTRACT:
In a method of manufacturing dry-pressed molded articles from essentially dry, pourable ceramic metal or carbon-containing molding compound in a mold of one or more parts, it is proposed to generate a negative pressure through the mold wall in the hollow space of the mold and, by means of the pressure difference generated as a result, to propel molding compound which is under pressure, for example, atmospheric pressure, through an injection opening into the hollow space of the mold and to precompress the molding compound in the mold while deaerating the molding compound, and that subsequently, the pneumatically precompressed molding compound is compression molded into a molded article having the desired final density.

REFERENCES:
patent: 3099045 (1963-07-01), Honkanen
patent: 3338999 (1967-08-01), Knapp
patent: 3726954 (1963-04-01), Munk
patent: 4191726 (1980-03-01), Stillhard et al.

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