Patent GB-452910-A (GB)
Title: Machine for the manufacture of blown glass articles of large capacity
IPC: C03B9/20
Filed: 1936-04-16
Abstract: 452,910. Making glass carboys. SOC. ANON. D'ETUDES ET DE CONSTRUCTIONS D'APPAREILS MECANIQUES POUR LA VERRERIE, 3, Rue de Castellane, Paris. April 16, 1936, No. 10938. Convention date, April 18,1935. [Class 56] A machine for making hollow glass vessels of large capacity, such as carboys, comprises a number of parison moulds which gather charges of glass by suction and are rotated intermittently about a vertical axis, and means for transferring the parisons to a single finishing mould. Preferably an intermediate mould is provided between the parison moulds and the finishing mould, so that the blowing of the parisons to their final shape takes place in two stages. The machine comprises two parison moulds 7 carried by a frame 5 which rotates about a vertical column 6. In order to dip a mould 7 into the mass of molten glass V from which charges are gathered, the column 6 is raised and lowered at intervals by a cam surface 45 on a continuously - rotated horizontal wheel 42. The weight of the mould unit is balanced partly by compressed air by means of a piston 52 secured to the column 6. A crank-pin 47 on the wheel 42 also rocks a vertical shaft which is connected bv a link 50 to a disc 19. The disc is oscillated through an angle of 90‹, and by its movement rotates the frame 5 and the moulds 7 step by step. It also moves the neck-forming plunger into and out of the ring mould 14. The halves of the parison mould are connected to a slide 11 which is moved horizontally by a cam 12 secured to the column 6, so that the moulds are opened and closed as they rotate about the column. At the transfer station, a parison is conveyed from the open parison mould into the intermediate mould 25 by a gripping device 37<a> supported by a carriage that is reciprocated horizontally along bars 38 by a cam 59 on a rotating wheel 54. The gripper is opened and closed when the carriage is moved in one direction or the other. The wheel 54 is secured to a wheel 43 which is rotated, together with the wheel 42, by a worm 44. A cam groove 55 on the wheel 43 operates shears 56 which cut off the glass when the filled parison mould is lifted. Another cam groove 57, and a cam groove 58 on the wheel 54, open and close the halves of the intermediate mould 25 and the finishing mould 26 which are mounted on sliding carriages 27. The worm 44 also rotates drums 63 carrying cams that control the application of suction and compressed air to the moulds. When a pa.rison mould is filled, it is raised and is rotated through an angle of 90‹ and is then lowered and comes to rest against a mould bottom mounted on the frame of the machine. In this position the parison is partly blown. In the next movement, the parison is brought to the transfer position, the mould opens, and the parison is supported by a bottom mould 24 which is raised to meet it. Next, the parison is transferred to the mould 25, and at the same time, a partly blown article is transferred to the finishing mould 26 and a finished article is taken out of this mould. Bottom moulds 30, 31 operate in conjunction with the moulds 25, 26 respectively, and are raised and lowered by the mechanism which opens and closes these moulds. The blowing of the article in the moulds 25, 26 is effected by atmospheric pressure, as described in Specification 300,638, [Class 56], by connecting the space within the moulds to the source of suction which is used for gathering the charges of glass.