Method of and device for forming vacuum sealed molds
US4009747A · kind A · utility
5Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1975 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Mar 12, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/03
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of and device for forming vacuum sealed molds, in which suction is applied to a charging material charged into a flask to remove the charging material adjacent the top of a sprue or a communicating passage thereby forming a cup-shaped pouring basin for the sprue or a funnel-shaped concave for the passage in a mold, thereafter a shielding film is applied over the upper surface of the flask, and a suction is applied to the charging material within the flask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.