Patent GB-189901038-A (GB)
Title: Improvements in Machines for the Manufacture of Glassware.
Inventor: BLUE CHARLES EDWIN
Filed: 1899-01-16
Granted: 1899-03-25
Abstract: 1038. Blue, C. E. Jan. 16. Blowing ; moulding. - Relates to machines in which glass is pressed into a blank in a press-mould and then transferred to a blow-mould in which it is blown to shape. In the form shown in Figs. 1 and 2, the machine is provided with supports B, C for the press-mould table D and blow - mould table E respectively, the gear-wheels G, F intermeshing so that the tables are turned simultaneously by the hand-levers L. The walls of the two-part pressmoulds a, b, c, d are hinged upon posts 3, and the moulds are closed by the action of the fixed cam K upon the friction-wheels i in the three positions a, c, d, but are opened in the position b to allow the blow-mould M to close about the blank. The neck rings e, locked by handles, rest upon arms H carried by joints I. A charge of glass having been introduced into the closed press-mould at the position d, the press-mould table is given a quarter revolution so as to bring the charged mould beneath the plunger V, which descends by the admission of compressed air above the piston T, and forms the blank r. During the next quarter revolution the press-mould opens and the blank is left depending from the neckring, which is still supported on the arms H. At the position b, where the paths of the press and blow-moulds intersect, one of the blow-moulds M closes about the blank by the action of the fixed cam P on the friction-wheel p, and a blow-head t with an automatic valve descends and supplies air to blow the article to shape. The tube w of the blow-head is carried by an arm s mounted on the rod of the plunger V, so that the operations of pressing a blank and blowing the finished article take place in successive moulds simultaneously. The blow-mould carries the blown article, together with the neck-ring, to the " discharge position shown in Fig. 1, where the mould opens, and the operator unlocks the neck-ring and removes the blown article. The neck-ring is then closed, and replaced on the arms H at the position c. In one modification, the arms which support the neck-ring are supported about a central column so as to rise and fall vertically, and are camactuated so as to open at the blow-point. The blank is lifted from the press-mould and lowered again into the blow-mould, the arms then opening to release the neck-ring. The blow-head may be independently operated by a treadle-lever, or may move with the plunger. A single stationary press-mould may be employed, the neck-rings rotating about the central column and lifting and lowering the blank as described above. The blow-moulds may be placed in position on a fixed table and openeu and closed by hand. A modified form of machine is also described, in which a single press-mould is employed, opened and closed in the vertical plane by means of a cylinder and piston situated beneath it. The neck-rings are gripped from above by radial arms which turn about a central column, the rings being released at the blow-point. Blow-moulds opened and closed by hand are arranged on a rotary table which is raised and lowered by a cylinder beneath it. In a further modification, a single table carries both the press and the blow moulds, the former being hinged so as to open downwards through openings in the table, and the latter being pivoted on a vertical post above the table. A cylinder placed beneath the pressing point closes the press-mould, while another cylinder arranged horizontally in the central column serves to close the blow-mould, the piston being actuated at the right moment by cam mechanism. A single fixed press-mould may be used instead of the series of four on the rotary table. Reference is made to Specification No. 14,481, A.D. 1897.