Multilayer molding using temperature adjustment of flow rate in conjunction with shooting pot technology
US7399442B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2005 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Mar 7, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed herein are methods and systems for forming a plurality of multiple layer plastic articles. The methods and systems utilize shooting pot technology in combination with a combination of thermal control elements and in some instances, specialized flow bore geometries to control a thermal property and a flow parameter of selected polymeric material flowing through the system to mold the plurality of multiple layer plastic articles. Both the systems and methods are well suited for use to perform simultaneous flow injection or sequential flow injection to form the plurality of multiple layer plastic articles. The systems and methods described therein beneficially reduce the mold cavity pitch size for multiple layer molds used with systems having shooting pot technology to a mold cavity pitch size found on conventional monolayer molds to provide a plurality of multiple layer plastic articles having a cost similar to monolayer plastic articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.