Injection device used for blow molding hollow plastic bodies, comprising extrusion mandrels that can be tempered and are inserted into extrusion mandrel fastener
US7147457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2003 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Sep 1, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is an extrusion mandrel fastener (2) that is embodied as a two-piece unit comprising a supporting beam (4) and a holding beam (5) which can be joined together and are provided with semi-cylindrical recesses (7, 8) complementing each other so as to form cylindrical recesses (9). An extrusion mandrel (3) is inserted into each cylindrical recess (9) and is retained therein. The extrusion mandrel fastener (2) and the extrusion mandrels (3) are provided with ducts (13, 14, 15, 16, 24, 25) which allow fluid circulation so as to temper the extrusion mandrels (3) and communicate with each other as well as with openings (11, 26) that are disposed on the extrusion mandrel fastener (2) via cylindrical connecting sleeves (30). Said connecting sleeves (30) are preferably sealed by means of sealing rings and fix the extrusion mandrel (3) to the extrusion mandrel fastener (2). Preferably, the holding beam (4) is configured as a two-piece element comprising an extrusion mandrel connection beam (17) and a fluid connection beam (18) which can be joined together and are provided with ducts (13, 14, 15, 24, 25). Said ducts (13, 14, 15, 24, 25) communicate with each other so as to allow fluid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.