Patent GB-320034-A (GB)
Title: Improvements in rotary machines for manufacturing glass hollow-ware and other moulded articles of glass
IPC: C03B9/22
Filed: 1928-06-01
Abstract: 320,034. Moncrieff, Ltd., J., and McNish, A. F. June 1, 1928. Blowing. - A machine of the suction gathering type for making glassware comprises a number of mould units carried by a vertical column, a table which is turned through part of a circle and carries the column with it to bring a parison mould to the gathering position, and means for returning the table to its initial position while the column remains stationary, the moulds being operated during the backward movement of the table by cams secured to the table. The machine comprises a base 1, Fig. 1, supporting a fixed vertical spindle 2 on which a hollow triangular prism or flat-sided column 3 revolves, and finishing-moulds 4 hinged to the column. A table 8 also revolves on the spindle 2 and carries on its upper surface a cam plate 17 for opening and closing the parison moulds 18 and the ring moulds, a track 19 for raising and lowering the finishing moulds, cams 20, 20a for raising and lowering the parison moulds, and a cam for operating a shearing-device. The table 8 is oscillated through part of a circle by a ratchet-and-pawl device which is operated by a rack 11 pivoted to a crank-pin 12 on a wheel 13. A locking- device secures the column 3 to the table 8 while the latter is moving in one direction, and releases it during movement in the other direction, the column being locked and held stationary during the reverse movement of the table. The parison moulds 18 are each split as usual, the two halves of each mould being pivoted on a bracket 37 secured to vertical guide rods 39 which slide in brackets 40 fixed to the column 3. The rods 39 carry a roller 42 which rests on the cams 20, 20a fixed on the table 8. Each ring mould 51, Fig. 7, also consists of two halves carried by pivoted arms 52. A shearing-blade for each parison mould is carried by an arm_pivoted on the bracket 37 and operated by a cam on the plate 17. The finishing moulds are mounted on baseplates 66, Fig. 1, hinged to the standard 3 and having at their outer ends rollers 67 which rest on a cam track 19 secured to the table 8. A blowhead 76, Fig. 7, associated with each parison mould, is carried by a bracket 77 and provided with a coaxial plunger 78. The plunger is connected by a bell-crank lever 79 with a roller engaging a slotted link 82, and the link is carried by slide rods 83 which are moved by a roller 86 and a cam 87 fixed to the head of the spindle 2. A pipe 88 connects the blowhead with a valve 91 which connects the blowhead with the supply of compressed air or the vacuum tank. The plunger 78 operates the neck-forming plug and also acts as a valve for cutting off the connection between the pipe 88 and the blowhead. The machine shown has three sets of parison moulds, and gathers its charges of glass by suction from a trough 97 connected with a tank furnace. Movement of the table in its forward direction brings a parison mould above the trough 97 and lowers a finishing mould containing a finished bottle to a position below the trough as shown. As soon as the movement of the table is completed and the column is locked, the table reverses and the parison mould dips into the trough 97 and gathers a charge of glass. Just before the table reaches the end of its backward movement the mould is raised out of the trough and a 'shear blade cuts off the string of glass. Also, during the reverse movement of the table, the finishing mould in position No. 2 has been lifted to its highest position by the track 19, as shown, and closes about a parison held by the ring mould, the parison mould having opened. The bottle is blown in the finishing mould as it travels during the forward movement of the table, and on the next reverse movement the mould is dropped to its lowest point. When the mould arrives at position No. 2 again, it is opened by a fixed cam 99 and releases the bottle.