Apparatus for producing double-walled composite tubes
US7452319B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/186
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for producing double-walled composite tubes, which have an outer wall with wave peaks and wave valleys and a smooth inner wall, includes two of rows first and second shaping-jaw halves which, along a common shaping section, form a shaping tunnel. The first shaping-jaw halves are located opposite each other in the shaping section and have an inner contour forming a tube socket portion. The second shaping-jaw halves, also located opposite each other, include transverse grooves alternating with transverse fins. A sizing mandrel, which defines narrow vacuum grooves spaced apart from one another in the axial direction on its outer lateral surface, projects into the shaping tunnel and forms the smooth inner wall of the composite tube. A vacuum control valve device provides for defined closure and reopening of the vacuum grooves when positioned in correspondence with the tube socket portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.