Patent GB-393178-A (GB)
Title: Improvements in automatic machines for the manufacture of large and small bottles and of other glass articles
IPC: C03B9/22
Filed: 1932-10-31
Abstract: 393,178. Glass manufacture. FECHOZ, E., Gilly-sur-IsÞre, Savole, France. Oct. 31, 1932, No. 30483. Convention date, Nov. 18, 1931. [Class 56.] A machine for forming glassware, in which charges of glass are gathered by suction, has the parison and ring moulds carried by an arm which oscillates about a vertical axis between the gathering point and a finishing mould, the parison and finishing moulds being disposed on the same level so that the parison is not subjected to movement in the vertical direction during its transfer from one mould to the other. The machine comprises a vertical standard 3, Fig. 1, mounted on a wheeled carriage 1 and carrying at its top a crosspiece 4 in which a vertical shaft 5 is journalled, the shaft being rotated continuously by a motor 7. An horizontal table 12, keyed to the upper end of the shaft 5, has on its faces a number of cam grooves which regulate the application of suction and compressed air to the moulds. One of the cams, 13, imparts a radial reciprocating movement to a rack 18 that engages a toothed sector mounted loosely on the shaft 5. The sector is secured to a sleeve 22 loosely mounted on the shaft 5, and an horizontal arm 23, which supports the ring mould 24 and the parison mould 25, is feathered on a key on the sleeves 22, so that it can be moved vertically while it is forced to move horizontally with the sleeve 22. Thus the rotation of the shaft 5 and the table 12 causes the mould arm 23 to oscillate in an horizontal plane through a half circle, and the cam 13 is so shaped that the arm pauses at the ends of its movement. The arm 23 rests on a sleeve 30 which rotates with slight friction on the sleeve 22 and on the shaft 5 and carries a number of cam plates 31 .. 34 which open and close the moulds and regulate the movement of the neck pin. The sleeve 22 is partly balanced by a weight 36 and is raised and lowered by a cam disc 43 which rotates with the shaft 5. The lowering of the sleeve dips the parison mould 25 into the glass in a forehearth 44 when a charge of glass is to be gathered into the mould. The ring and parison moulds are carried by arms 52, 53 which are pivoted on a vertical rod 74 secured to the arm 23. The finishing mould 29 consists of two halves carried by holders 91 which are pivoted on a vertical spindle 91a, as shown in plan in Fig. 4. The mould is opened and closed by a cam 92, Fig. 1, which is secured to the cam 43 and rocks a lever 95. A blowhead 102, co-operating with the finishing mould, is mounted on an arm 103 secured to a vertical rod 104 which is also movable vertically in its bearings 105, 106. The vertical movement is effected by a cam 116 and horizontal rotation by a cam 107. Cooling.-Air is blown into the hollow standard 3 and circulates through a hollow bracket 134 and through channels in the supports 91 of the finishing mould, whence it passes around the shells or halves of the mould. Air also passes through an inclined pipe 138, Fig. 4, into two conduits 139, 140, to nozzles 141, 142, which direct the air on to the halves of the parison mould. The conduits are pivoted about a chamber 137, Fig. 1, surrounding the shaft 5, and when the parison mould moves towards the finishing mould, rods 147 on the conduits are engaged by forks 146 on the parison mould and the conduits are forced to move with the moulds. As the parison and ring moulds approach the finishing moulds, the conduits and the parison moulds are separated by fixed deflecting members 149, 150, which make contact with the rods 147. A counterweight returns the cooling device to its original position as the arm 22 moves backwards. Shearing.-The string of glass depending from the mould after a gather has been made is cut off by a knife 151 pivoted on the rod 74 and operated by a sliding rod 152, Fig. 8. A spring 158 is coiled on the rod 152, and a roller 153 on the inner end of the rod engages a groove 154 in the cam disc 34. The cam consists of parallel grooves joined at one end by a radial section a, b, and at the other end they are separated by a spring-operated pawl 155. As the arm 22 swings towards the finishing mould, the roller moves along the section b, c of the cam groove until it passes the pawl 155. On the backward movement of the arm 33, the roller 153 passes into the section c-a of the groove 154. During this movement, the knife is swung away from the mould and the spring 158 is compressed. When the mould arrives above the gathering point, the roller is in line with the radial section a, b, of the cam groove, but is prevented from moving along it by a stop 160 which engages the end 159 of the rod 152. As soon as the mould has risen from the glass after making a gather, the end of the rod 152 clears the stop 160, and the spring 158 causes the knife to swing under the mould and cut through the trailing glass. The knife may be made to move vertically, while it is under the mould, to exert pressure against the bottom of the mould, or it may be moved to one side before it is disengaged. The bottoms of the parisons may be bevelled or rounded off in order to remove the scar produced by the knife blade. This may be done by a tool, rotated by any suitable means, mounted below the parison mould, and brought into action by a cam immediately after the knife has moved away from the bottom of the mould. Means are also provided for regulating the lowest point to which the mould dips into the glass.