Injection apparatus for injection molding machine
US6309203A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/504
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection apparatus for a motor-driven injection molding machine comprised a barrel unit for heating and plasticating polymer material, a screw disposed in the barrel unit rotatably and movably in the axial direction, a first rotating shaft having one end connected to a rear end of the screw, a charging motor for driving the first rotating shaft for rotation, a ball screw mechanism consisting of a second rotating shaft having a threaded rod portion, and a threaded nut member engaging with the threaded rod portion, an injection carriage having a front plate for mounting the barrel unit thereon, and a rear plate for supporting the second rotating shaft at the rear end thereof, an injection motor for driving the ball screw mechanism, and an intermediate mount plate, disposed movably between the front plate and the rear plate, for linking the first rotating shaft to the second rotating shaft coaxially with a predetermined distance spaced apart between the rear end of the first rotating shaft and the front end of the second rotating shaft. Back pressure acting on the screw in a charging process can accurately be controlled without requiring a difficult control operation for controlli…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.