Patent GB-457030-A (GB)
Title: Improvements relating to machines for manufacturing glass bottles and the like
IPC: C03B9/18
Filed: 1935-02-15
Abstract: 457,030. Glass manufacture. EVANS, W. E., 27, Chancery Lane, London.-(O'Neill, F. ; 400, Atlantic Avenue, Montreal, Canada) Feb. 15, 1935, Nos. 36204 /34 and 26494/35. [Class 56] Relates to a glassblowing- machine of the continuouslyoperated double-table type in which the parison moulds are inverted after receiving charges of glass, and consists of improvements in the means for guiding the charges into the moulds, for settling and counterblowing the charges, and for locking the moulds. The machine comprises a parison mould table, Fig. 1 and a finishing mould table, Fig. 18, arranged side by side and geared together by means of gear rings 39, 201, respectively. The parison moulds 40 receive charges of glass from a feeder F, and each charge M is guided into a mould by one of a pair of funnels 168 mounted on the ends of an horizontal slide 170 which slides in a guide 171 secured to a vertical shaft 173 rotated by the gear ring 39. The slide 170 is provided with rollers which engage a stationary cam 177, and the cam is so shaped that a funnel is held in register with the opening of a parison mould while the mould is passing beneath the feeder. Each parison mould 40 and ring mould 43 is mounted on the outer end of an horizontal sleeve 46, Fig. 4, which is journalled in a bearing 47 radial to the axis of the column 35 about which the parison mould table rotates. Rollers 49 mounted on the sleeve 46 engage notches or recesses on a plate 51, Fig. 1, secured to the central column 35, so that each mould is inverted and reinverted as the table rotates. A detent or plunger 54 operated by a rocking lever, engages notches 53 in the sleeve and locks a mould unit in either of its two vertical positions. Each parison mould is composed of halves which are hinged on a pin 42 and are opened and closed by mechanism disposed within the sleeve 46. This mechanism includes a yoke 64, Fig. 8A, connected to the mould halves by links 65 and secured to the end of a rod 68. The rod is moved outward by a slider operated by a stationary cam, a coil spring 73 forming a resilient connection between the slider and the yoke. A spreader 77 is secured to a sleeve 79 which slides over the rod 68 and is thrust outwards by the slider through the medium of a coil spray 82. When the slider in its outward movement has closed the mould, continued movement of the slider forces the spreader 77 between tail pieces 78 formed on the links 65 and securely closes the mould. The halves of the ring mould 43 are normally held closed by means of a coil spring 87, Fig. 4, and they are opened at regular intervals by a tapered pin 88 which is thrust between the mould arms by an extension 94 on a lever 58 rocked by a stationary cam. The neck-forming plunger or mandrel 107, slides within the ring mould and is attached to a tubular holder 103 that slides through a bracket 96. The mandrel is normallv withdrawn from the ring mould by a spring 106. Suction, or air under pressure, is applied to the ring mould by a sleeve 112 carried by a pivoted arm 108 which is raised and lowered by a stationary cam. Pipes 110, 111, attached to the arm 108, communicate with a distributer 118 in the central column 35. When the arm 108 is raised, the sleeve 112 makes contact with the open lower end of the mandrel holder 103, and suction or pressure, to settle the glass or counterblow it, is applied to the ring and parison mould cavities at the proper time. The arm 108 also moves the mandrel 107 into the ring mould to form the initial blow opening in the glass in the mould. The arm is lowered when the parison mould is to be inverted. After a charge of glass has entered an upturned parison mould, the opening of the mould is closed by a baffle plate 142, carried by a holder 143 which slides through a bearing on the outer end of an arm 147. This arm is rotated horizontally by a rack, operated by a stationary cam. A lever 155, pivoted above the arm, is connected at its outer end to the baffle plate holder 143 and at its inner end carries a roller which runs in a stationary cam. In the operation of the machine, after a charge of glass has entered a parison mould, the arm 147 swings horizontally to bring the baffle plate over the mould, and the lever 155 then lowers the baffle plate into contact with the opening in the mould where it stays in position during the counterblowing period while the glass charge is being expanded in the mould to form the parison. The baffle plate may also be provided with a valve by which air under pressure may be introduced above the glass in the mould, in order to settle the glass about the mandrel 107. The finishing moulds 202, Fig. 18, are carried by a table which rotates about a central column 195. Each mould consists of two sections hinged on a pin 205, and is opened and closed and locked by mechanism similar to that used with the parison moulds. Each finishing mould, together with a bottom plate holder 203, is mounted on a carrier 206 which slides in a vertical slideway 207 and is adjustable vertically by a screwed rod operated by a hand wheel 209. The bottom plate holder 203 is pivoted on an horizontal pin and is swung in a vertical plane, to and from the mould, by a lever 232 operated by a fixed cam 235. Each mould is provided with a blowhead 236, carried by a pivoted holder 237 and moved to and from the mould by a stationary cam. The blowhead is connected by pipes to a distributer 254 mounted on the central column 195. A gear wheel 266, rotated by hand, is provided for rotating one element of the distributer in order to regulate the beginning and duration of the period of the final blowing operation. The mould tables are rotated continuously by an electric motor, and a mechanical slipping clutch is provided which opens the circuit of the motor to prevent damage if there is undue resistance to the drive.