Sand-introducing device using air, and method and apparatus for producing a mold
US7762307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Jun 9, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C15/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sand-introducing device that uses air for introducing molding sand in a molding space or spaces is provided. The device is provided with air-permeable partitioning plates that define a double-walled structure together with the wall of the body of the device. The air-permeable partitioning plates are easily produced, they can easily inject pressurized air of a desired pressure, and they will not need regular maintenance. The body of the device, which acts as a pressure tank, defines a double-walled structure together with the air-permeable partitioning plates (10, 11), thereby defining chambers (12, 13). In the sand-introducing device that uses air, while molding sand is fluidized by pressurized air injected from the air-permeable partitioning plates, it is introduced in a molding space. Each air-permeable partitioning plate is made of a porous resin or metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.