Apparatus for producing a preform for the manufacture of a hollow body from thermoplastic material
US5206032A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jun 24, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C49/041
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for producing a preform for the manufacture of a hollow body from thermoplastic material by extrusion blow molding has an extrusion head with a material-storage chamber which can be emptied by a piston to produce the preform. At its peripheral surface the piston has a groove-like recess providing a receiving passage which extends parallel to the direction of movement of the piston, for receiving plasticized material from the extruder connected to the extrusion head. Communicating with each of the two end regions of the receiving passage are respective duct systems through which respective flow portions of material from the extruder flow to the storage chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.