Coextrusion feedblock, coextrusion profiling insert assembly, and methods of operation
US9808980B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Oct 29, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92695
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a coextrusion feedblock having a flow adjuster, a viscosity compensation device, an actuator, a central extrusion conduit, and a coextrusion conduit. The invention also provides a coextrusion profiling insert assembly constructed to be mounted in a coextrusion feedblock. The insert assembly has a flow adjuster, a viscosity compensation device, and an actuator. The insert assembly when mounted in the feedblock has a coextrusion conduit extending between the flow adjuster and the viscosity compensation device. The actuator is adjustable to apply force to bend the viscosity compensation device and thereby adjust a gap height of the coextrusion conduit. Also provided is a method of operating a feedblock having a viscosity compensation device comprising a flex region, a central extrusion conduit, and a coextrusion conduit. Force is applied to bend the flex region of the viscosity compensation device and thereby adjust a gap height of the coextrusion conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.