Strike off method for automatically leveling and compacting sand in mold boxes of varying heights
US4262730A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1980 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jan 21, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C25/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The specification discloses a strike off apparatus for leveling and compacting mounds of sand extending above the upper edges of open-top mold boxes of varying heights carried in succession along a pathway. A pair of pivotally supported rollers extend across the pathway. A sensor determines the height of a sand mound in a mold box before it reaches the rollers. An elevating mechanism responsive to the sensor adjusts the rollers to a height so that they level and compact the sand mound as the mold box is carried thereunder. A control system including electrical and hydraulic circuits is provided for automatically controlling the cyclical operation of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.