System for feeding portions of material to an injection molding machine
US6688493B2 · kind B2 · utility
8Cited by
13References
30Claims
0Family size
Inventor
Key dates
| Filing date | Mar 13, 2003 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Mar 13, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76765
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for feeding portions of material to an injection molding machine including a feeding device that can be a screw feeder, an external container, a material hopper with inclined and parallel walls located inside the container, a load cell that is coupled to the material hopper and a controller. The system dispenses accurate weight portions of material in a given time and for a given duration. The system controls the portion weight by weighing a number of dispensed portions using loss-in-weight of the hopper, divides the weight to the number of portion and, when needed, controls the spin of the screw feeder motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.