GB288342A - A process of and machine for fabricating articles of glass - Google Patents

Abstract

288,342. Miller, Inc., W. J., (Assignees of Miller, W. J.). Oct. 16, 1925, [Convention date]. Divided on 259,965. Blowing.-In a machine for making glassware, the parison moulds receive charges of glass during continued movement in an upright position past a charging point, and each mould is provided with a co-operating parison-forming element at its upper end, means being also provided for applying suction to effect a downward pulling on a charge of glass entering the mould to cause it to conform to the walls of the mould. After a charge has entered the mould, pressure may be applied from above to compact the glass and expand it in the mould. The mould table consists of a hollow hub 6, Fig. 2, which rotates about a hollow column 2 and is formed with a number of hollow arms 8, Fig. 3. The pipes for conveying compressed air to the moulds are led through the hol. low arms 8, and air for cooling the moulds passes through the spaces in the arms. Each set of moulds, with their operating- gear, is carried by a structure consisting of an upper frame 9 and a lower frame 10 which are bolted together. The whole structure, with the moulds completely assembled, can be lifted on to a pair of table arms 8, and when placed in position, ports in the mould structure register with corresponding ports in the arms 8 to which the air supply pipes are connected. The halves, of the parison mould are clamped to holders 36, Fig. 2, hinged on a pin 38 and opened and closed by a sliding plate 26. The plate is operated by a fixed cam and is connected with the mould holders by a spring dog 31, Fig. 3, which yields if the mould resists movement and thus prevents damage to the machine. The pin 38 is eccentrically mounted, as shown in Fig. 2, and may be turned to adapt it for variations in the length of the hinge members. The lower end of the mould closes abound the ring mould 79 which is carried by a transfer arm 53 that turns the parison over and transfers it from the parison mould to the finishing mould. In order to compact a charge of metal into the parison and ring moulds, suction is applied through the ring mould and compressed air through a mould cover which is brought down on to the open end of the parison mould. The mould cover is carried by an arm 86, Fig. 3, which is reciprocated vertically, and is swung to one side when raised in order to clear the parison as it turns over. The plug 122, for forming the initial opening in the parison, is moved up and down by a rod 121, Fig. 2, operated by a fixed cam 126. After a charge is compacted, the plug 122 is lowered and air is supplied through the ring mould to blow up the charge to fill the parison mould. The mould cover has a rounded lower end to shape the bottom of the parison, and it also regulates the length of the parison. Specification 156,569 is referred to. Reference has been directed by the Comptroller to Specifications 142,156 and 192,347.