Electric injection molding machine for controlling injection speed and injection pressure of electric injection molding machine
US6854967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2001 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76943
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an electric injecting molder and an injection velocity and injection pressure controlling method for an electric injecting molder, and it is an object of the present invention to make it possible, in injection molding by an electric injection molder, to mold stable resin products having a minimized dispersion in the quality even if the operation environment varies. When an injection screw (23) disposed in an injection cylinder (22) is driven to move in forward and backward directions by an electric motor (29A) to inject resin material (3) in the injection cylinder (22) into a metal mold (1, 2) to fill the metal mold (1, 2), the electric motor (29A) is first velocity-controlled to fill the resin material (3) into the metal mold (1, 2), and, after the filling, the electric motor (29A) is pressure-controlled to replenish the resin material for shrinkage of the resin. Upon the velocity control, a velocity target value for the injection screw (23) is corrected in response to a force detection value so that the velocity target value for the injection screw (23) may decrease as the force detection value increases to perform velocity feedback control of the electri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.