Self-centering arrangement for coacting forming tools
US4556377A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1984 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Feb 24, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/36
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection mold with a female mold portion and a male mold portion has a locking ring which closely surrounds one mold portion and has a beveled inner centering surface coacting in a mold-closed position with a complementarily beveled outer centering surface of the other mold portion for properly aligning the two mold portions with each other. The locking ring and the mold portion surrounded thereby form an assembly mounted on a backing plate by means of bolts screwed into that assembly, the bolts having heads bearing upon spacing sleeves which abut the assembly and are received with some clearance in a bore of the backing plate. The sleeves project from the bores of the backing plate to provide room for one or more Belleville springs acting upon the bolt heads to keep the sleeves under pressure. The bolts, sleeves and springs, being thus rigidified with the assembly of mold portion and locking ring, are slightly shiftable relatively to the backing plate within the clearance of their bores for automatically compensating disalignments due for example to thermal causes. The locking ring may be separable from the associated mold portion in a mold-open position to entrain a stripper …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.