Tie-rod assembly for an injection molding press

US5017120A · kind A · utility

Assignee

• KraussMaffei GmbH · DE

Inventors

• Reinhard Holzinger · Birkenfeld, DE
• Gerhard Weiss · Ludwigshafen, DE

Key dates

• Filing date: Oct 17, 1989
• Grant date: May 21, 1991
• Expiry date: Oct 17, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S425/221
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A tie-rod assembly used in a press having an inside fixed mold end plate, an outside fixed end plate spaced from the inside plate, a movable mold plate between the end plates, and an actuator for displacing the movable mold plate toward the inside mold end plate for pressing tools carried by the mold plates together in a closing direction and for moving the tools apart in an opposite opening direction includes a tie rod extending along an axis in the direction through the movable plate and having a threaded inside end and an outside end and a stationary threaded element carried on the inside end plate and axially aligned with the tie rod displaced by the actuator independently of the movable plate between a use position and a changeover position with the threaded end withdrawn in the opening direction and spaced from the inside end plate, a nut actuated by a rotary drive for screwing the nut in the changeover position from the tie-rod on the threaded element and inside and outside bracing devices engageable between the tie rod ends and the respective end plates for pressing the tie rod ends against the end plates in the use position.