Apparatus for producing uniform density and weight briquettes

Details Apparatus for producing uniform density and weight briquettes Apparatus for producing uniform density and weight briquettes

1982-09-07

1983-11-08

Hall, James R.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Molding pressure control means responsive to pressure at...

B28B 1700

Patent

active

044139675

ABSTRACT:
In a hydraulic press for briquetting loose powders into green compacts, a load cell senses maximum compacting force. The maximum compacting force is compared with a compacting standard force known to effect a particular weight and density of compacted briquette. There is next operated a closed-loop servo network which adjusts the peak force to the standard force by varying the initial size of the cavity receiving the loose powders. Should the peak force be greater or less than standard force, an actuating mechanism is energized either to enlarge or diminish the die cavity for receiving the powder. If the peak force is too small, the initial die cavity size is enlarged so that a greater amount of powder is charged to the die cavity. The result is that when the final configuration of the briquette is reached, there will be greater density and greater weight to the briquette, causing it to more nearly approximate a standard briquette weight and density. Conversely, the die cavity is automatically initially reduced in the event that compacting maximum force is too great so that the final compacted briquette will contain less powder, thus reducing the density and weight and thereby adjusting the finished product to a standard briquette size and density.

REFERENCES:
patent: 2888715 (1959-06-01), Frank
patent: 3255716 (1966-06-01), Knoechel et al.
patent: 4000231 (1976-12-01), Peterson
patent: 4100598 (1978-07-01), Stiel et al.
patent: 4207047 (1980-06-01), Kolb et al.

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