Back to results
US 4,726,757 AGranted
Moulding apparatus
AssigneeThe World Health Organisation
InventorFrancis D. Berry
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeThe World Health Organisation
InventorFrancis D. Berry
Estimating the term…
A rotary turret injection moulding machine has a turntable (12) carrying a plurality of mould sets (17) and arranged to be rotated continuously, a device for injecting moulding material into the moulds and a clamping mechanism for holding the moulds closed during the injection being reciprocated in synchronsym with the rotation of the turntable. Each mould set has one part (18) firmly mounted on the turntable and another part (19) which pivots for opening and closing the mould. A cam (40) follower coupled to the movable part cooperates with a stationary cam (41) extending around the turntable axis to close and open the mould as the turntable is rotated. The movable mould part includes a mould plate mounted for tilting movement on its support arm, and dowel pins (30) and sockets (31) on the mould plates are arranged to ensure correct alignment when they are closed together.
An injection moulding apparatus comprising a turntable, drive means for continuously rotating the turntable, a plurality of mould sets carried on the turntable, a clamping and injecting assembly including means for clamping each mould set closed and means for injecting moulding material into the mould set while clamped closed by the clamping means, and means mounting the clamping and injecting assembly for reciprocal movement along an arcuate path in synchronizm with the rotation of the turntable.
Dependencies are inferred from the claim text.