Injection mold
US4524943A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Jul 18, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/703
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection mold for the manufacture of sealing elements consisting of elastic material and having undercuts, particularly sealing bellows for joints, for example ball joints in automotive vehicles, includes followers which are divided centrally in the longitudinal direction of the sealing element and form the outer contour. The mold has a core plunger which forms the inner contour and is divided into an upper core plunger part and a lower core plunger part which are movable relative to each other. The sealing element is removed from the foregoing parts after the opening of the followers. In order to be able to remove the sealing element automatically form the mold without the use of parting agent the followers are split in transverse direction into an upper and a lower pair of followers in the region between the inner undercut of smallest diameter and the outer undercut of smallest diameter. The pairs of followers being movable independently of each other for successive gripping of the sealing element during opening of the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.