Nozzle touch apparatus in an injection molding machine
US4950144A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Feb 14, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1777
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A nozzle touch apparatus in an injection molding machine is provided, which is capable of preventing deformation of a stationary mold half due to a nozzle touch force applied thereto, and of making it possible to use a mold of a type liable to be deformed for production of precise molding products. Springs interposed between a seat plate of the nozzle touch apparatus and a projecting wall of an extruder base generate the nozzle touch force which varies in magnitude as a function of a compressed amount of the springs. Upon a mold lockup state being released, a ball screw is rotatively driven, so that the seat plate, which is integral with a ball nut engaged with the ball screw, retreats from its moved position at the mold lockup state, to reduce the nozzle touch force and prevent deformation of the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.