Patent GB-264062-A (GB)
Title: Improved machine for manufacturing bottles and other hollow objects made of glass
IPC: C03B9/20
Filed: 1926-05-31
Abstract: 264,062. Soc. Anon. d'Etudes et de Constructions d'Appareils MÚcaniques pour la Verrerie. March 19, 1926, [Convention date]. Blowing ; gathering molten metal. - An automatic machine for forming glassware comprises two parison moulds which are moved periodically into the furnace to gather charges of glass by suction, and it is characterized by the fact that the joint between the halves of the moulds is arranged in a plane at right-angles to the direction of movement of the moulds. By this construction, the interior surfaces of the moulds are in contact with hot gases of the same temperature, and the parisons formed in the moulds are equally heated and blow up more evenly. General construction. The machine comprises a pair of parison moulds A, Figs. 1 and 14, which are mounted in one support and are moved horizontally into and out of a working hole in a tank furnace B, a pair of finishing moulds C which are mounted alongside the parison moulds when in their rearward position, and ring moulds D which are moved laterally to transfer the parisons to the finishing moulds. The moulds and blowheads receive their movements from cam discs 22, 23, 94, 160, Fig. 4, which are driven by pinions mounted on a shaft 124. The disc 94 has three notches 137 - - 139, Fig. 1, arranged equidistantly around its periphery, and a roller 136 on a bell-crank lever 133 falls into these notches and moves one member of a clutch which releases the pinions from the shaft 124. The movement of the moulds is thus stopped periodically while a gather is being made, the parisons are cooling in the moulds, and the parison moulds are being cooled in their open position. The clutch is closed and the discs are restarted by three lugs 141 - - 143 adjustably secured to the edge of a rotating disc 144. This disc is driven by a friction gear 147, 148, and its speed of rotation may be adjusted, in relation to that of the shaft 124, bv moving the gear-wheel 147 by means of a screw 152. The adjustment of the speed, in conjunction with the adjustment of the position of the lugs 141 - - 143, enables the duration of the stoppage of the cam discs to be regulated. Moulds, construction and mounting. - The parison moulds A each consist of two halves 1, 2, Fig. 14, which are loosely mounted in sliding blocks 3, 4 respectively. The block 4 is rigidly connected to two slide bars 7, while the block 3 is pivoted on a slide bar 5. The bars 5, 7 move together to carry the moulds into the furnace and are moved relatively to one another to open or close the moulds. The loose mounting of the mould parts 1, 2, and of the block 3, ensures tight closing of the moulds. The bars 5, 7 are carried and guided by supports 8, 9 on a carriage 10 which slides on rollers 27. 28. The front rollers 27 are raised and lowered periodically by a lever 40 in order to dip the parison moulds into the glass when they are making a gather. The ring moulds each consist of two sections 51, 52, Figs. 8 and 14, which rest on a frame 53 fixed to a lever 54 pivoted on the guide 9. The sections of the moulds are closed by the parison moulds, and are opened by cams 80, Figs. 1 and 14, which are lowered on to the ring moulds and engage pins on the mould sections. The cams are secured to the lower ends of rods 82 which are oscillated by racks 88 through shafts 85 and bevel wheels 83, 84. The levers 54 are oscillated, to swing the ring moulds from the parison moulds to the finishing moulds, by a cam on a carriage 58 which is slidable on the carriage 10 and is moved by levers 59 operated by cam plates 22, 23. Suction heads 67, Fig. 8, carried by tubes 68 which are supported by the carriage 10, move with the parison moulds into the furnace and apply suction to the mould to gather a charge of metal. A plunger 71, for forming the initial opening in the parison, slides through each suction head and is raised and lowered bv a lever 75 pivoted on the carriage 10. The finishing moulds each consist of two halves 103, Fig. 1, carried by levers 104 which are opened and closed by links 106 and a lever 108 operated by the cam disc 94. The cam 80, which opens the ring moulds, also constitutes the blowhead for blowing the parisons in the finishing moulds. The shaft 82 is hollow and is supplied with blowing-air through a flexible tube. Cooling moulds. - The finishing moulds, and the parison moulds when in their rearward position, are situated above a vertical conduit 102, Fig. 1, up which cooling air is blown. The open moulds are thus exposed to a blast of air during the whole of the time they are outside the furnace. Operation.-In use, the pair of parison moulds with the ring moulds in position is carried into the working-hole of the furnace by the movement of the carriage 10, and the lowering of the supporting-rollers 10 dips the moulds into the glass, as shown in Fig. 8. Suction is applied to the moulds through the tube 68 and suction heads 67, and charges of glass are drawn into the moulds. The moulds are then lifted from the glass and a shear blade 95, Fig. 1, carried by a horizontally movable rod 96, is moved across the bottoms of the moulds. The blade severs the string of glass depending from the gathered charge and closes the open bases of the moulds while they are being withdrawn from the furnace. The moulds when in their rearward position are opened, and the ring moulds are moved sideways to transfer the parisons to the open finishing moulds. The finishing moulds are then closed and the parisons are blown by the blowheads 80.