Patent GB-199377-A (GB)
Title: Improvements in or relating to glass shaping machines
IPC: C03B9/195
Filed: 1923-05-29
Abstract: 199,377. Hartford-Empire Co.. (Assignees nf Lorenz E. H.), June 14. 1922, [Convention date]. Blowing; pressing. - A press-andblow machine comprises moulds carried by two intermittently rotated turrets, means for lifting the parison moulds into operative relation with the ring moulds at the pressing station, an automatic take-off device, and safety devices which stop the machine should an obstruction interfere with the proper working of the various parts. The machine comprises two turrets supported in a suitable framework; a blow turret 67 for carrying the finishing moulds, ring moulds, bottom plates, and their operating mechanisms, and a blank turret 66 for carrying the blank or parison moulds. The circular paths of these two sets of moulds touch at the pressing station A, Fig. 2, where the parison is pressed and is transferred to the finishing moulds. The two turrets are geared together by gear rings 113, 114, Fig. 1, and are rotated intermittently by a helix cam formed on the surface of a power-driven drum 110. In the operation of the machine, charges of metal from a suitable feeder pass by way of a shoot 557, Fig. 2, and a guide 558, into a parison mould which is then moved by the rotation of the turret to the pressing station A. The mould, which is carried by a slide, is elevated as it approaches the pressing-station, and is then lifted still higher, while at the same time the turrets are locked and an anvil is thrown into position below the mould to support it during the pressing operation. Meanwhile, one of the ring moulds 157 carried by the blow turret, has been brought into position over the parison mould, and a plunger, operated by a compressed-air cylinder 200, descends and presses the metal, forming the parison and the neck ring. The anvil is then drawn back and the parison mould lowered, leaving the parison suspended by the ring mould. The turret then carries the parison to station B, Fig. 2, where a bottom plate 276 is raised into position and a finishing mould 243 closes about the parison and ring mould. A blowhead 313 descends on to ring mould, and a valve is opened by a cam to admit compressed air to blow the parison, blowing taking place while the mould is moving to station E. At station F the mould is opened and the bottom plate is lowered, and a take-out device is swung inwardly bringing a delivery plate 379, Fig. 1, into supporting-position beneath the finished article X. A plug 383 is then lowered into the article to steady it, the ring mould is opened to release the article, and the take-out is swung outwardly gradually releasing a camcontrolled delivery rod which, with the aid of the plug, pushes the article on to a receiving- table. Power to operate the machine is supplied to a driving-shaft 71 through a clutch which is opened or closed by a compressed-air cylinder 103. The clutch is provided with an overload release device, and can be opened by trips such as 550, 513, on a shaft 454. These trips are connected to the mechanisms, performing the different operations in making the ware, and they are actuated to stop the machine should any of the mechanisms be obstructed or should there be any abnormality in their timing.