GB288345A - Improvement in glass fabricating machines - Google Patents

Abstract

288,345. Miller, Inc., W. J., (Assignees of Miller, W. J.). Oct. 16, 1925, [Convention date]. Divided on 259,965. Blowing.-A machine for forming glassware comprises a unit which includes a permanently inverted parison mould, a blow mould in fixed relation thereto, means for swinging the parison by means of the ring mould from the parison mould to the blow mould, and means for returning the ring mould to the parison mould before the completion of the article in the blow mould. The mould table consists of a hollow hub 6 which rotates about a hollow column 2 and is formed with a number of hollow arms 8. Each set of moulds, with their operating gear, is carried by a structure consisting of an upper frames 9 and a lower frame 10 which are bolted together, and the whole structure can be lifted on to a pair of table arms 8 as a completely assembled unit. The halves of the parison mould are clamped to holders 36 hinged on a pin 38 and opened and closed by a sliding plate 26. The pin 38 is eccentrically mounted and may be turned to adapt it for variations in the length of the hinge members. The lower end of the mould closes around the ring mould 79 which is carried by a transfer arm 53 secured to a shaft 54. This shaft is oscillated by means of a reciprocating rack and swings the parison over from the parison mould to the blow mould. The halves of the blow mould are carried by holders 146 which are hinged on a sleeve 119, and they are opened and closed by a, sliding yoke 150 operated by fixed cams 158. The yoke also operates parallel sliding rods 158 which open the ring mould when it has deposited the parison in the blow mouid. When the blow mould has closed around a parison, the ring mould is opened and releases the parison and is then swung back under the parison mould to receive a new charge of glass. While the new parison is being formed, a blowhead descends on the blow mould and completes the blowing of the first parison, so that one parison is being blown while another is being formed. 'The connection between all the moving parts and the cam rolls that operate them is made by spring dogs which yield if the movement is obstructed. Reference has been directed by the Comptroller to Specifications 156,569 and 257,637.