Process for core removal from molded products
USRE35334E · kind E · reissue
6Cited by
34References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1994 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Feb 17, 2014 |
Classification
- Technology area (CPC —)General
Abstract
A method of removing a core from a molded product in which the core is formed of a particulate inert material, such as .[.sand-bound.]. .Iadd.sand, bound .Iaddend.together by a cured binder of a water soluble carbohydrate alone or mixed with a silicate is disclosed. The silicate is preferably an alkali earth metal silicate, preferably sodium silicate, and the carbohydrate is preferably a saccharide or starch. The binder is cured by heat. The core and molded product are exposed to water, preferably heated water in a bath or steam, to rapidly disintegrate the core and remove it from the molded product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.