Method and device for producing a two-chamber tube
US6551543B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Sep 17, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2022/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing a two-chamber tube with a dividing wall (9) that extends into the tube head. This method comprises the following steps: a) inserting a dividing wall (9) into the gap (8) of an auxiliary mandrel (6); b) sliding a prefabricated tube pipe body (11) onto said auxiliary mandrel (6), which has been fitted with the dividing wall (9); c) axially transferring the blank (12) produced in step b) from the auxiliary mandrel (6) onto a pressing mandrel (2); d) adding a molten portion of a plastic material in a female mold (3); e) conveying the pressing mandrel (2) with the blank (12) into the female mold (3) with the portion of a plastic material in an axial position, in order to mold a tube head onto the blank (12); f) pressing the material portion between the pressing mandrel 92) and the female mold (3) in order to form a tube head, at the same time producing a solid connection with the pipe body (11) and with the section of the dividing wall (9) that is located in the area of the tube head by closing the mold; g) opening the mold, removing the pressing mandrel (2) and withdrawing the finished two-chamber tube. The invention also relates to a dev…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.