Apparatus and method for blow moulding two thermoplastic sheets with the use of pneumatic operable membranes which close the mould halfs
US6444160B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1999 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2033/205
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus comprising first fluid supplying means for supplying inflating fluid to between opposite portions of thermoformable material, first and second parts for receiving said portions between them, one of the parts being in the form of a shell defining a recess having a surface against which said inflating fluid presses one of said opposite portions driving means operable to bring the shell into a closed conditions relative to the other part and to maintain the shell in said closed condition, and second fluid supplying means arranged to supply operating fluid to said driving means, wherein the driving means and the second fluid supplying means are pneumatic. A method comprising providing first and second parts one of which is in the form of a shell, supplying operating fluid to driving means to translate the shell towards the other part, with opposite portions of thermoformable material being received between the first and second parts, to bring the shell into a closed condition relative to the other part, and supplying an inflating fluid to between said opposite portions to inflate said opposite portions while said driving means maintains said shell in said closed condition,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.