Patent GB-365245-A (GB)
Title: Improvements in and relating to machines for forming glassware
IPC: C03B9/22
Filed: 1930-11-15
Abstract: 365,245. Glass manufacture. LYNCH CORPORATION, Central Indiana Railroad, Anderson, Indiana, U.S.A.-(Assignees of Bridges, E. G. ; c/o Lynch Corporation, Anderson, Indiana, U.S.A.). Nov. 15, 1930, No. 34462. Convention date, Nov. 21, 1929. [Class 56.] Blowing.-Relates to an automatic glassblowing machine, of the kind described in Specification 160,366, [Class 56, Glass], in which the parison moulds and the finishing moulds are carried by separate horizontal tables which are rotated intermittently in order to bring the moulds to successive stations where such operations as charging, pressing the blanks, blowing the blanks, &c., take place. According to the invention, a machine of this type is so constructed that each of the periods during which the table is stopped is of very brief duration, sufficient to permit the charging of a mould and the transfer of a parison, but not sufficient for the shaping of the glass in the moulds which takes place during movem'ent of the moulds. Fig. 1 shows the invention applied to a bottle-making machine in which the parison moulds 12 and the finishing moulds 13 are carried by two tables 10, 11, respectively, and in which the tables are rotated step by step in unison with one another. Charges of glass are gathered by suction into the parison moulds from a rotating tank 80, and the moulds are opened and closed, and the parison transferred to the finishing mould, in the usual manner. A device is provided for taking the finished articles out of the finishing moulds and placing them on a conveyer belt. The forming-operations on the glass are carried out during the movement of the moulds, but the charging, transferring and discharging operations take place at periods during which the moulds are at rest. The mould tables 10, 11 rotate on fixed vertical columns 15, 16, respectively, and they are so interconnected by gear wheels 21 that the parison moulds and the finishing moulds approach the transfer station from the same direction. The gear wheels are so arranged that they may be assembled on the bench as a unit for easy replacement, and they are housed within a well 22, closed by a cover 23, which forms an oil bath. The moulds are rotated step by step by means of a pneumatic cylinder 47, Fig. 4, which reciprocates a pair of parallel racks 42, 43 arranged in different horizontal planes. A gear wheel 41, Figs. 4 and 5, is bolted to the lower end of a driving-unit 36 which rotates on a vertical shaft 40 and carries a number of vertical rollers 35 that engage the slots 34 of a Geneva wheel 33 secured to the mould table 11. The unit 36 is reciprocated vertically by means of a pneumatic cylinder 50, and in its lowest and highest positions, the wheel 41 engages one of the racks 42, 43, respectively. Thus the reciprocation of the racks rotates the tables 10, 11, in one direction only, and the periods of dwell between successive movements is only long enough to permit charging or discharging the moulds, or transferring a parison. The weight of the driving-unit is counterbalanced by a weight 57 on a lever 54 which also operates a valve 69 that controls the admission of air to the cylinder 47. Gathering.-The pot 80, Fig. 1, from which the molten glass is gathered, is supported on a vertical shaft 81 which may be rotated through suitable gearing. The shaft 81 forms the piston-rod of a pneumatic cylinder 86, and the weight of. the pot and shaft is counterbalanced by means of a weight 83 on a lever 84. In use, the pot is raised by the cylinder 86 to bring the molten glass up to a parison mould in order that a charge of glass may be gathered to the mould by suction. The pot is then lowered so that the mould may be moved away from the gathering position. Specification 4884/04, [Class 56, Glass], is referred to. Suction is applied to a ring mould at the gathering point by means of an air-operated piston 98 that moves into connection with the ring mould holder 91 having a port 99, Figs. 1 and 18, leading to the cavity of the mould. The mandrel 92 of the ring mould is normally retracted by a spring 95 and is depressed at the gathering point by a cam 97 engaging a roller 96 on the mandrel. A separate passage 100 is formed in the ring mould for the admission of air for counter blowing the parison. The ring mould is opened at the transfer position by an air cylinder 108. Removing formed articles.-The take-out mechanism for removing formed articles from the finishing-moulds comprises a rotatable member 125, Fig. 7, carrying gripping devices 124 which lift the ware from the bottom plate 107 of the finishing mould and deposit it on a support, such as a conveyer 112 leading to a leer. The grippers 124 are actuated by the pistons of pneumatic cylinders 130 which are journalled in bearing sleeves secured to the member 125. When removing bottles of flattened shape, it is desirable to place them in the conveyer with their long sides parallel with the length of the conveyer. For this purpose, the upper surface of each of the gripper cylinders 130 is provided with ribs 150, 151 which are engaged by stop members 147 as the cylinders are moved between the finishing-mould and the conveyer. The engagement of the ribs rotates the cylinder within the sleeve and turns it so that it deposits the bottle on the conveyer in the desired position.