Patent GB-243880-A (GB)
Title: Improvements in or relating to machines for making glassware and the like
IPC: C03B9/18
Filed: 1924-11-01
Abstract: 243,880. United Glass Bottle Manufacturers, Ltd., Moorshead, T. C., and Riley, A. Nov. 1, 1924. Blowing.-A machine for blowing glassware is enabled to rotate continuously, without the necessity for stopping and starting the moulds for a charging or gathering operation, by arranging the charging point for the glass at the centre of the machine. Each of the parison moulds is moved in turn to the centre, of revolution to receive a charge of glass and is afterwards returned to a point at which it may register with a finishing mould. Supporting the moulds. The parison moulds 31 are carried by a frame R which revolves about a hollow column P mounted on a carriage A. Screws D, which are geared to a common shaft, enable the frame of the machine to be raised or lowered to adjust the position of the moulds in relation to a feeder. A second column S is mounted within and coaxial with the column P, and at its upper end forms a connection with a valve 3 for sucking air from the parison moulds as they are brought in turn to the central charging position. The supports 9 for the finishing moulds 10 are pivoted to the revolving frame R and are provided with rollers 11 which run on a track 12 fixed to the base-ring N of the column P. The track 12 is shaped to raise and lower the moulds at appropriate times, the moulds being opened and closed, in the known manner, by a roll 14 which engages a track 15 on a fixed cam-ring Q. Forming the parisons. The gathering-arms U, which carrying the parison moulds, are journaled in bearings carried by the frame R, and the axles U' of the arms are so arranged that the arms rotate, or turn over, in planes which are radial to the axis of the columns P, S. This turnover movement is obtained by slides 20 which are reciprocated by means of rolls 21 engaging a cam groove 22 in the fixed ring Q. Racks formed on the slides engage teeth formed on the axles U<1> of the arms. The arms thus swing the moulds either to the gathering-position, in line with the axis of the machine, or to the edge of the frame R where they are in position to register with the finishing moulds. When an arm has swung to this position, the halves of the parison mould are swung back clear of the parison by means of a slide 17 operated by a cam roll 18. The finishing mould is then raised and closed on the parison. Blowing takes place with air supplied through a blowhead 23 which is pivoted on the arm and swings into close contact with the arm above the ring moulds. The arm also carries a plunger 48 for forming the mouth ring of the bottle and the initial opening in the parison. The plunger is carried by a rod 24 which slides within a sleeve 25 on the arm and is also turned through an angle. The combined movement lowers the plunger into the ring mould, and when raising it, swings it to one side. A cap similarly mounted on the arm closes the end of the mould, while the charge of metal is being blown up to form the parison. Operation. In use. the machine rotates continuously and the parison moulds are brought in turn to the central position to be charged with metal which may be directed into the mould by a funnel. The charge is packed down into the mould by suction applied through the column S, and also by compressed air applied by a blowhead 80 which is brought over and seated upon the open end of the mould. The blowhead is then removed, and the gathering arm is turned over to bring the mould to the transfer position. After the parison is blown up, the mould is opened and a finishing mould, which has risen into position, closes on the parison and blowing is completed. Air for cooling the moulds and other parts of the machine is supplied through the column P which is provided with ports 1 that register at appropriate times with corresponding ports in the rotating frame R.