Patent GB-961435-A (GB)
Title: Glass article forming apparatus
IPC: C03B9/195
Filed: 1960-04-13
Abstract: In a glass article forming machine, three neck rings are equally spaced for simultaneous movement directly above equally spaced parison mould, blow mould and delivery station, the parison mould including a plunger co-operating therewith to force a gob of molten glass into the shape of the mould and into the neck ring positioned thereupon whereafter, on withdrawal of the plunger, the parison so formed can be transferred by the neck ring to the blow mould for blowing to final shape and then on to the delivery station.  As shown, three neck rings 38, mounted on arms of a holder 20 for rotation about, and sliding on, a vertical shaft 24, normally lie at positions A, B and C over, respectively, a parison mould 44, a finishing mould 46 and a discharge conveyer 42.  The holder 20 is raised from the normal position shown, at which the neck rings 38 positively engage the parison and finishing moulds, by an air cylinder 22, a pinion 26 engaging a fixed bar 28 to prevent rotation until the top of the stroke, when the pinion 26 engages a rack 32 carried by the piston-rod of an air cylinder 36 which is then actuated to rotate the holder 20 through 120 degrees.  The cylinder 22 is then exhausted so that bar 28 is re-engaged by pinion 26 and the holder 20 lowered.  At station C the neck ring halves, which are normally held closed by a spring 40, are opened on the downward movement of holder 20 by a fixed spear 74 mounted on the main frame 12 for release of a finished mould to conveyer 42 and the empty neck ring 38 moves at the next rotation to station A, the mould being closed as it is raised clear of spear 74.  At station A where the parison mould is charged and shaped, a bracket 50 is mounted <PICT:0961435/C1/1> <PICT:0961435/C1/2> on a shaft 48 for oscillation from the normal position shown, where a funnel clamp 56 is aligned with the parison mould 44 to receive a gob of glass, to the position at which a spring-loaded ring adaptor 54 and press plunger 52 are aligned therewith.  Shaft 48 is connected to air cylinder 58 by which the bracket 50 is lowered and rotated, by a roller engaging a cam slot, so that the adaptor 54 is aligned with and positively engages the neck ring and parison mould while the plunger 52 enters the mould to force the glass into a parison and to force the glass up into the neck ring.  The cylinder 58 is reversed to raise the bracket 50 and rotate it to its normal position, leaving the neck ring holding the parison which is raised, rotated and lowered into the finishing mould 46 at station B on the next operation of holder 20.  At station B a blow head carrier 72 is mounted on shaft 70 carried by the piston of air cylinder 68 for lowering the carrier 72 into engagement with the neck ring 38, pressure fluid through carrier 72 then forming the finished mould.  The cylinders 22, 36, 58 and 68 are operated by air pressure from supply pipe 76 fed to a valve chest 78, the valves being operated successively by a timing drum 82 on a shaft 84 rotated from the main drive shaft 80. The whole machine may be mounted on wheels 86.  The moulds 44, 46 may be one piece as shown or may be partible.