GB250299A - Improvements in glassware machinery - Google Patents

Abstract

250,299. Hall, R. F. Oct. 21, 1924. Blowing.-Relates to a bottle-making machine of the turnover type in which a number of sets of parison and finishing moulds are carried by a table that rotates, preferably continuously, about a stationary central column. Each mould-carrying unit comprises a casting p, Fig. 1, which is secured to the rotary table c and has its lower part formed as a trunnion s on which the arms t of the finishing-mould are journaled. The casting is formed with a horizontal boring within which a sleeve u is mounted so that it is free to rotate but cannot move longitudinally. A toothed wheel v secured to the sleeve engages an interrupted circular rack w secured to the stationary central column a, so that the sleeve is periodically rotated as the table c rotates. A second sleeve 3 is mounted within the sleeve u and is constrained to rotate with it, but it is free to move longitudinally. This sleeve carries the halves 7 of the parison mould which are opened and closed by a roller 12 and a cam fixed to the central column a. The sleeve 3 also carries an arm 14 provided with a cover 16 which closes the bottom of the parison mould at appropriate times. The blowing-head 22 is carried by an extension 21 of the sleeve u, and the halves 23 of the ring mould are pivoted on the extension 21. The blowhead is connected by a passageway 34 in the casting p and by pipes 42 with a distributing-ring 43 by which suction or compressed air is applied to the blowhead. The passage 34 is closed by a spring-loaded valve 36, and both this valve and the mandrel for making the initial opening in the blank are operated, as the mould 7 is turned over, by cams secured to the casting p. The halves 61, Fig. 5, of the finishing mould are pivoted in the arms t, and they carry pinions 62 which gear with racks 63 mounted on the table c. Thus as the mould is opened the halves rotate on their pivots in order to give clearance for the parison mould. In operation, a charge of glass falls into the parison mould and suction is applied to the blowhead to settle the glass into the ring mould. The cover 16 is then applied to the mould, and the rotation of the sleeve u turns the mould over, and the parison is blown up during the rotation. The parison mould halves are opened and are then drawn back towards the central column, this movement, which gives clearance for the finishing mould, being accomplished by the movement of the sleeve 3 longitudinally within the sleeve u. A mould bottom 65 is brought up against the parison, the finishing mould is closed, and the blowing-operation is completed. The bottle is finally discharged on to a belt conveyer which is travelling at the same linear speed as the bottle. The bottom 65 may be made movable in its support 70 in order that bottles with "pushed" bottoms may be made. The neck mandrel may be arranged to form the necks of the bottle with internal screws.