Moulding mechanism for a glassware forming machine
AssigneeEmhart Industries, Inc.
InventorDavid Braithwaite
Life of this patent
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Abstract
A moulding mechanism for a glassware forming machine comprises a mould (30; 170, 172), a supporting plate (31; 174) supporting at least a bottom portion of the mould, a plenum chamber (32, 34; 176, 177) extending downwardly from the supporting plate and arranged to supply air at substantially equal pressure to passages (33, 175) in the supporting plate which communicate with cooling passages (50; 192, 194) in the mould, and a piston and cylinder assembly (36, 38; 178, 180) operable to raise and lower the supporting plate (31; 174). At least a portion of the plenum chamber (32, 34; 176, 177) is formed as a tubular piston rod (34; 177) extending upwardly from the piston (36; 178) of the piston and cylinder assembly.
Claims1
A mold mechanism for a glassware forming machine comprising
- mold clamping means including a pair of opposed pivotally supported levers,
- means for pivotally displacing said levers including first cylinder means having a piston rod secured to said levers, said piston rod having a bore therein,
- second cylinder means including
- fixed cylindrical housing means matingly received within said piston rod bore,
- said cylindrical housing means having a cylindrical inner bore and a concentric radially spaced tube located therein, and
- piston means having a bore extending therethrough for mating axial displacement along said tube and an outer diameter for axial mating displacement within said second cylinder inner bore,
- said piston means bore terminating with an enlarged chamber at the top thereof, said plenum chamber having a plurality of axially extending holes extending through the top thereof,
- mold means secured to the top of said plenum chamber and having a plurality of holes extending axially therethrough in communication with said axially extending holes in the top portion of said plenum chamber, and
- means for displacing said piston means from an upper glassware forming position to a lower position.
Dependencies are inferred from the claim text.