Latching device for injection molding dies

US4671764A · kind A · utility

Inventor

• Karl Hehl · Usedom, DE

Key dates

• Filing date: Oct 3, 1985
• Grant date: Jun 9, 1987
• Expiry date: Oct 3, 2005

Classification

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

Abstract

A device for automatically latching together the two die halves of an injection molding die of a plastics injection molding machine, when the die is removed from the machine, the device comprising a guide sleeve in one die half having a guide portion cooperating with the guide bore of a guide bushing in the other die half, a latching plunger in the guide sleeve having a latching head cooperating with an end face of the guide sleeve to radially expand a split latch ring or a cupped latch disk into engagement with a groove of the guide bushing, when the latching plunger is freed to move from its depressed release position to its latching position, under the action of a preloaded plunger spring. The attachment of the die half to a die carrier member automatically disengages the latching device by depressing the latching plunger.