Device for removing an injection molded substrate from an injection mold
AssigneeKrauss-Maffei Kunststofftechnik GmbH
InventorWolfgang Hechtl
Life of this patent
Estimating the term…
Abstract
A device for removing an injection-molded substrate with attached sprue from an injection mold having half-molds, in particular a substrate for optical data carriers, includes a lever that can swing in and out of a position between the half-molds of the injection mold and is constructed to include a substrate retaining mechanism with a substrate retaining member with a recess or an opening sized to hold the substrate and configured to receive the sprue with a pass fit. The substrate retaining member secures the substrate in place as the lever swings in and out of the open half-molds. An injection molding machine using the device is also described. The substrate can be quickly demolded and the sprue removed in a single operation without producing dust in the mold.
Claims25
A device for removing an injection-molded substrate with attached sprue from an injection mold having half-molds, comprising:
- a lever swingable in a movement direction in and out of a position between the half-molds of the injection mold;
- and
- a substrate retaining member to hold the substrate, said substrate retaining member having a receptacle which is contoured to mate with the sprue sufficient to secure the substrate with the sprue in place as the lever swings in movement direction.
A device for removing an injection-molded substrate with attached sprue from an injection mold having half-molds, comprising:
- a lever swingable in and out of a position between the half molds of the injection mold and constructed to include a substrate retaining mechanism;
- and
- a peg constructed to hold the substrate and insertable in a receptacle produced in the substrate when the sprue is separated.
An injection molding machine for producing a substrate with attached sprue, comprising:
- an injection mold having half-molds that form a mold cavity for the substrate and have a sprue channel for introducing plastic melt into the mold cavity;
- an extraction device for removing the substrate with the sprue, said extraction device including a lever swingable in and out of a position between the half-molds of the injection mold and constructed to include a substrate retaining mechanism, said substrate retaining mechanism including a substrate retaining member having a receptacle sized to hold the substrate and configured to receive the sprue with a pass fit so that the substrate retaining member secures the substrate in place as the lever swings in and out;
- a sprue ejector for separating the sprue, said sprue ejector placed outside the injection mold and having an axially movable die, wherein the substrate retaining member is adapted to be aligned with the die, after the lever swings out of the half-molds;
- and
- a resistance member placed on a side of the substrate retaining member facing away from the die, so that the substrate retaining member is urged against the resistance member when the sprue us expelled.
Dependencies are inferred from the claim text.