Apparatus for producing uniform density and weight briquettes
US4413967A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Sep 7, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B11/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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 adju…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.