Injection-molding station for the manufacture of multilayer preforms
US9610720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Apr 30, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection-molding station for the manufacture of multilayer preforms comprises an injection-molding machine (2), at least one multi-component nozzle (3), at least two melt accumulators (4, 5) constructed as cylinder accumulators and connected thereto, at least two plasticizer units (6, 7) for charging them and a control unit (8). The multi-component nozzle has slides (17, 19), which are associated with the melt channels (9, 10) and which are separately activated by the control unit independently of one another in such a way that the respective melt channels have an infinitely variable passage cross section. Proportional actuators (26, 27) that can be activated by the control unit are associated with the pistons (22, 23) of the cylinder accumulators. The control unit comprises a memory unit for coordinated movement or position profiles of the at least two closing slides and the at least two melt-accumulator pistons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.