Molding apparatus and method
US7543626B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 8, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C21/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention teaches an improved method and apparatus to make metal alloy castings, such as railroad car connector knuckles. One embodiment of the invention comprises a plurality of core mold assembly units contained within a single molding flask, wherein the mold units are filled with molten metal by way of a common runner and riser system. The said core mold assembly elements may be further comprised of a mold and core assembly formed of the same material, such as phenolic urethane impregnated sand, which is used to accurately replicate the desired shape of a final desired product. This invention eliminates the need to carefully gauge a plurality of part patterns within a single mold flask and reduces the potential for loss of parts, for example by cold shunting, by segregating each part to its own mold isolated mold unit. Such a method and apparatus allows a plurality of parts to be cast in a more accurate way, producing less scrap, improving part dimensional stability, and in some cases, reducing the number of cores needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.