http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2325297-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e1018b924ad1e238642eaad9d2172a7 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2999-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B30B15-0017 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B30B15-0011 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-03 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B30B15-00 |
| filingDate | 2000-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_147e5d22ca1e26be580a60d9fba45d6b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_017198238fe7d4c2e233664f3f485335 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3f71cbb0a43160d865d1bd317d0b9a51 |
| publicationDate | 2004-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2325297-C |
| titleOfInvention | Die wall lubrication method and apparatus |
| abstract | A method of lubricating the wall surfaces of a die cavity used in powder metallurgy involves spraying the wall surfaces with tribocharged particles of a lubricant material. The method is carried out by means of an apparatus centered about a plug member which has a three-dimensional shape conforming generally to that of the article to be formed. The plug member is slightly smaller than the article so that when the plug member is inserted into the die cavity there is a small, but uniform, gap created between the outer wall surfaces of the plug member and the walls of the die cavity. The plug member is secured to a closing plate which can be inserted into the die cavity so as to be sealed therewith. The closing plate is provided with vent holes and the plug member has a plurality of spaced apart tubes extending therethrough, which tubes exit at one or more of the wall surfaces of the plug member. The lubricant material is fed using an inert gas under pressure through tubing which tribocharges the lubricant particles and the tribocharged particles are sprayed from the tubes in the plug member into the gap so that they are electrostatically attracted to the walls of the die cavity and adhere thereto. Any excess gas and lubricant exits the gap through the vent holes in the closing plate. A uniform thin coating of lubricant is created on the walls of the die cavity. The green density of the article formed in the die is greater, and the ejection force required to remove the formed article from the die cavity is less, than with existing methods and apparatus. |
| priorityDate | 1999-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.