Nozzle and apparatus for injection molding
US7252501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Aug 10, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/231
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A nozzle controls flow of melt in injection molding equipment by passive actuation with opening and closing of a mold assembly. The nozzle comprises a valve pin having a pin passage therethrough movably supported within a nozzle passage and a contact arm transverse to and extending beyond the nozzle passage, the valve pin sealingly engaging the nozzle passage. Biasing means biases the valve pin to a closed position preventing passage of melt through the nozzle. The contact arm effects movement of the valve pin to an open position when closing of the mold assembly exerts a force on the contact arm to overcome the biasing means. A mold arrangement of plural mold assemblies comprises pairs of nozzles of the invention to control flow of melt through mating conduit segments between an injection unit and at least one mold assembly, the nozzles arranged and configured for seating engagement with abutment of the conduit segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.