B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/42 (2006.01) B29C 49/56 (2006.01) B29C 49/06 (2006.01)
Patent
CA 2239192
A universal mold carrier for use in a mold assembly compensates for parting forces associated with container formation by directing a compensating air flow pressure to the rear surface of the mold carrier. The mold carrier comprises two mold halves adapted to matingly engage each other and hold within the mold carriers interchangeable mold shells. One of the mold carriers has an outside wall that has a plurality of independent air flow compensating surface areas located thereon. This mold carrier further has an air flow communication line interconnecting the independent air flow compensating surface areas. Shut off valves are located in the one carrier to close and to open the air flow communication line between adjacent independent air flow compensating surface areas to allow for adjustment of the compensating pressure. The shut off valves each include a valve stem adapted to open and close the valve thereby connecting or disconnecting the independent air flow compensating surface areas located on opposite sides of the valve. The valve stem is positioned in the carrier along its parting wall which is accessible to an operator when the mold halves are open. The mold half carrier permits an operator to open or close off supply of compensating pressure applied to different compensating systems during a quick change over of the mold shells carried by the mold half carriers.
Craig Wilson And Company
Wentworth Mold Ltd.
Wentworth Mould And Die Company Limited
LandOfFree
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