Patent GB-111868-A (GB)
Title: Improvements in the Manufacture of Glass Bottles and in Glass Shaping and Blowing Machines therefor.
Inventor: WILZIN ARTHUR
IPC: C03B9/16
Filed: 1916-10-11
Abstract: 111,868. Wilzin, A. Oct. 11, 1916. Blowing; cutting off excess of metal.-Relates to glass shaping and blowing machines of the kind in which, after the introduction of the glass into the parison mould, the several and subsequent operations on the parison and on the finished bottle are performed automatically and in proper sequence, the durations of the several operations being capable of variation at will and independently, as described in Specifications 7183/12, 20299/13, and 3146/15, and comprises automatically controlled means for (1) submitting the parison to an automatically controlled temperature equalization process, the duration of which may be varied at will by means of a controlling-device with adjustable dogs &c. which connect and disconnect the machine with the source of power, (2) forcing the glass into intimate contact with the walls of the parison mould, and (3) expediting the stretching of the parison. The operator delivers a quantity of glass from his gathering-rod into the parison mould 55, the penetration of the glass to the neck mould 75 being ensured by the connection of the mould to a source of negative pressure air passing through a pipe 135 and through a passage adjacent to the indenting-plunger 76. By then depressing a pedal, a clutch is coupled up and a loose control-wheel 24 is caused to make one revolution. The control wheel 24 carries a series of depressions, pins, and adjustable dogs which control the times and sequence of the various operations of the machine. The first movement of the control-wheel 24 cuts off the air and allows a pair of spring-actuated shearing- blades 99, 100 to sever the glass hanging from the gathering-rod. The continued rotation of the control-wheel 24 intermittently operates a clutch so as to produce intermittent rotational movements in a pair of cam-disks 4, 5 secured to a shaft 3. The first movement of the cam-disks, by operating a rack 60 gearing with a pinion 59, rotates the parison mould 55 through 180 degrees, the plunger 76 being withdrawn from the neck mould by a cam-groove 79 on the frame, and the lower end of the parison mould being closed by a bottom mould. An adjustable dog on the periphery of the control-wheel 24 opens a valve and allows high-pressure air to pass through the pipe 135 and act on the cavity formed by the plunger 76, thus pressing the whole surface of the parison into intimate contact with the walls of the parison mould and minimizing temperature variations due to local contacts. The air is cut off and the camdisks 4, 5 again rotate, thus causing the hinged halves of the parison mould to swing open and leave the parison supported by the neck and bottom moulds only. Whilst in this condition, the inner heat of the parisen restores the surface to a more uniform temperature, the duration of this pause, as also the other steps in the process, being regulated by the adjustable dogs on the control-wheel 24. A further movement of the cam disks 4, 5 removes the bottom of the parison mould and brings the bottom mould 103 of the finishing-mould into position, and the stretching of the parison commences, such stretching being assisted if desired by the admission of puffs of low-pressure air liberated by means of pins projecting from the control wheel. A still further movement of the cam disks 4, 5 closes the finish. ing-mould about the parison and the blowing is completed by readmitting the high-pressure air. On completing a whole rotation, the cam-disks 4, 5 restore the various parts to their initial pcsitions and, by opening the finishing and neck moulds, drop the blown bottle into a divided cooling-pot 117 whence, after the bottom of the bottle has been indented by a reciprocating spigot 123<a>, the bottle is tipped down a shoot. The hinged halves of the neck mould are held in closed position by a spring and are opened to drop the bottle by the opening movement of the finishing. mould. When dealing with bottles having internal screw-threads at the mouth, the plunger 76 is provided with a screw-thread of corresponding pitch and during its withdrawal is given a rotary movement by means of a gear connexion which is substituted for the cam 79.