http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112404359-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9900248ab48f3005ac2bd08809034e52 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22C9-123 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22C9-12 |
| filingDate | 2020-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c79d06d30e70fb900efdbd3cb3b8695a |
| publicationDate | 2021-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112404359-A |
| titleOfInvention | Method for eliminating air holes in stainless steel casting cast by sodium silicate sand |
| abstract | The invention discloses a method for eliminating air holes in stainless steel castings cast by sodium silicate sand, which comprises the following steps: (1) core setting: placing a loam core on a lower mold parting surface of the casting cavity, and then covering an upper cavity of the casting cavity after placing the loam core; fixing: fastening and fixing the upper and lower cavities by using a basket screw; plugging: sealing the gap between the upper cavity and the lower cavity by using sodium silicate sand; inserting an air pipe: inserting a carbon dioxide gas pipe into the bottom of the pouring gate and the bottom of the front flange or the bottom of the riser farthest from the pouring gate; sealing a dead head: covering each riser with a paperboard or a cover plate for sealing; adjusting the flow: adjusting the ventilation flow of the carbon dioxide trachea; air blowing: blowing carbon dioxide gas for 15-25 min through a carbon dioxide gas pipe. Compared with the prior art, the invention has the advantages that: eliminate the pores of stainless steel castings, improve the product quality and reduce the rejection rate. |
| priorityDate | 2020-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 15.