Closed loop control of auxiliary injection unit
US8715547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jun 23, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus of controlling commencement of an injection of a melt stream of moldable material from an auxiliary injection unit. A sensor is placed in an injection molding system to sense a condition related to an injection of a first melt stream of a first moldable material provided by a primary injection unit. Commencement of a second melt stream of a second moldable material from the auxiliary injection unit is initiated upon the sensed condition related to the injection of the first melt stream being detected at a preselected value. The sensed condition may be a pressure, velocity or temperature of the first melt stream as provided by a direct sensor, a force or strain on a hot runner component as provided by an indirect sensor or the occurrence of a function of the injection molding system as provided by a functional sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.