Patent ID: 7927087
Filing Date: 2011-04-19
Classification: B29C

Abstract:
1. Apparatus for molding electronic devices in a mold, the apparatus comprising: a mold supply pot positionable on a surface of the mold during molding and configured for holding a molding compound; at least one runner extending along the surface of the mold and positioned in a feeding direction, the runner having an opening, the runner being connected to the mold supply pot through the opening for channeling the molding compound from the mold supply pot to the electronic devices in the mold; a plunger assembly comprising a main body configured to be positioned in the mold supply pot, the main body of the plunger assembly having a contact surface at one end thereof, the contact surface being configured to project in a plunging direction perpendicular to the feeding direction until the contact surface comes into contact with the surface of the mold during molding and expels molding compound from the mold supply pot, the plunger assembly further comprising a supplementary body which is movable relative to the main body and is configured to be driven in the plunging direction towards the runner after the contact surface has come into contact with the surface of the mold for further forcing the molding compound from the mold supply pot into the runner; and a single plunger block coupled to the plunger assembly, the single plunger block including a push rod and the single plunger block being configured to drive the main body and the supplementary body, and the single plunger block being also configured to engage the supplementary body via the push rod and to separately drive the supplementary body via the push rod to move relative to the main body when movement of the main body is obstructed; wherein a width of the runner measured across the mold supply pot at a position along the opening of the runner is smaller than a corresponding width of the main body of the plunger assembly.