Patent GB-255927-A (GB)
Title: Improvements in machines for the manufacture of hollow glassware
IPC: C03B9/18
Filed: 1925-04-27
Abstract: 255,927. Pearson, T. F. April 27. 1925. Blowing. - A continuouslyrotating blowing machine of the turnover type, intended for use in conjunction with an automatic feeder, comprises a rotary ring carrying a number of mould units each of which supports blow mould arms and a turnover member arranged between the arms, each turnover member carrying parison mould arms and a blow head. Air for blowing the ware and for cool. ing the moulds is supplied from a central distributor through passages formed in the body of the mould units. General construction. The machine comprises a circular bedplate 1, Fig. 1, mounted on wheels 2, a central vertical hollow column 11 secured to the bedplate, and a ring 10 which rotates in a circular groove or track 4 in the bedplate and supports the mould units. Cams 12, 13 and a spider 17 are secured to the column 11. Each mould unit is mounted on a hollow base 18, bolted to the ring 10, and comprises a hollow cylindrical body 19 on one end of which a turnover plate 22a is rotatably mounted. A bevel gear 22, formed on the rim of the plate, engages segmental racks mounted on the spider 17 and thus turns over the ring and parison moulds which are carried by the plate 22a. Ring moulds. The halves 38 of the ring mould are pivoted on a bush 33 carried by a pin 30, Fig. 5, which is provided with a handle 31. A turn of the handle enables the bush on which the ring mould is mounted to be quickly removed and replaced. The mould halves are connected to a slide 48, and a pin 46 projecting from this slide comes into contact with a cam secured to the spider 17 and opens and closes the mould. The bracket that supports the ring mould carries a blow-head 50 which contains the mouth-forming plug 58. A tail piece 54 projecting from the blowhead makes contact, as the moulds turn over, with a spring-cushioned cam 57, Fig. 1, and raises the plug 58 into the ring mould. The plug bearing is formed in a wing nut 51, Fig. 5, which screws into blowhead and is quickly removed when replacement of the plug is necessary. The plug may be arranged to make bottles with screw mouths its bearing being screw threaded so that the plug when revolved is fed into or out of the ring mould. Parison and finishing moulds. Each parison mould is made in two halves. 71, 72, Fig. 4, which are pivoted on the plate 22a and are opened and closed by a slide 83 mounted within the cylindrical body 19 and operated by a fixed cam 12. A spring 84 is interposed between the slides and the cam roller to prevent damage if the mould halves should be obstructed. The finishing mould halves 96 are carried by arms 92 which are pivoted on the cylindrical body 19 and are moved by a cam 13 to open or close the mould. The mould halves are pivoted at 97 to the arms 92 and have slotted extensions 109. Radius rods 111. pivoted at one end to the brackets of the arms 92, slide through swivel stops 110 which are adjustably secured to the extensions 109, springs 114 being interposed between the stops 110 and nuts 113 screwed on to the rods. By this construction, the mould halves are made to swing about their pivots 97 and their meeting faces remain approximately parallel with one another as they are moved apart and are prevented from damaging the finished article. The mould arms 92 are rectangular in outline, as shown in Fig. 1, and enclose a space into which the halves of the parison mould enter when they are folded back and the finishing mould closes. A bottom 129 for each finishing mould is carried on a spindle 136 pivoted on one of the arms 92. The bottom is swung below the mould by a cam and is raised into position by a cam 140. According to the Provisional Specification, the bottom block may be arranged to form bottles with pushed" bottoms. Air supply; cooling. Compressed air and suction is distributed to the blowheads by a stationary chamber 144 and a port ring 149 rotatably mounted thereon and connected by radial arms 150 to the cylindrical bodies 19. The ports through the walls of the chamber 144 are opened or closed by valves 146 which can be adjusted to control the quantity of air delivered to a blowhead at an particular period in its cycle of operation. An air jet 165 is mounted on each blowhead to direct air on to a blank while, it is suspended from the ring mould previous to transfer to the blow mould. The object of this is to cool the blank to overcome its tendency to curl. The arms 92 of the finishing moulds are hollow, and air is supplied to these hollow arms by means of a ring 171 rotatably mounted on the column 11 and connected with its interior by ports. The air issues from ports in the arms and is blown on to the moulds to cool them. Driving-mechanism. The machine is driven by means of a motor 9 through a worm wheel 7 and worm ring 5 coaxial with the ring 10. A clutch connecting the two rings enables the machine to be stopped instantly but ensures that when the clutch is re-engaged, the machine will be in step with the feeder. Gathering. A gathering-funnel 201 is carried by a swinging arm 202 which has a lug 207 that engages a lug 208 on the machine frame. The funnel is thus forced to move with the machine, but when a charge has been received from the feeder, the funnel arm is disengaged from the lug 208 and a spring 206 swings the funnel back into position to direct a charge into the following mould. Removing formed articles. The finished articles left hanging from the ring moulds may be deposited on a rotating table which delivers them to a moving conveyer.