Patent GB-190702992-A (GB)
Title: Process and Apparatus for the Manufacture of Hollow Glassware.
Inventor: COX CHARLES FRANKLIN
Filed: 1907-02-06
Granted: 1907-07-04
Abstract: 2992. Cox, C. F. Feb. 6. Blowing and moulding bottles; gathering metal; shearing.-Relates to a machine in which the molten metal is sucked up into the parison mould from the working tank and the parison is expanded in the finishing-mould by suction. The parison-mould halves V are capable of sliding vertically on guiderods 4, and are supported by levers 5, pivoted at 6 to the machine frame and moved outwards so as to open the mould halves by the admission of compressed air between the pistons 8, Fig. 9, the rods 7 of which are secured to the levers 5. The mould halves V may be moved vertically on the rods 4 by the action of compressed air upon a piston 28. Fig. 10, the rod 29 of which is attached to the cylinder 9, in which the pistons 8 work. A piston 18, contained in a cylinder 17, is connected by a rod 19 to links 20 which operate levers 21, pivoted at 22 to the machine frame, and to the ends of which knives X, X are attached. Compressed air is simultaneously admitted by pipes 23, 11, E to the cylinders 17, 9 and to a small cylinder B, respectively. The piston 18 is thus moved to the right and the knives X, X are separated. The air from the pipe 11 is conveyed by ports 10, Fig. 12, to the ends of the cylinder 9, thus moving the pistons 8 towards one another and closing the parison mould V. The air admitted to the cylinder B depresses a small piston J, connected by a rod K to the plunger M, which is thus projected downwards into the neck mould I. The further action of the compressed air causes a piston F, in a cylinder A, to descend, carrying with it the neck mould I, which is attached to the lower end of the hollow piston-rod G. The neck mould passes through a hole U', Fig. 8, in a slide U<3> to which the finishing-mould bottom is attached, and strikes the top of the parison mould V, pressing it downwards till it dips into the molten metal W<1>. The parts are then in the position shown in Fig. 1. The air is next exhausted from the parison mould by way of the hollow rod G. holes G<1>, and pipe R<2>. When the parison mould is full of glass, the air supply is cut off from the pipes 11, 23, E, and compressed air is admitted by a pipe 30 to the adjoining cylinder. This raises the piston 28 and hence also the mould V. As soon as the port 26 in the cylinder is uncovered by the piston 28, the air passes along the pipe 25 and enters the cylinder 17 by the port 24, causing the piston 18 to move to the position shown in Fig. 9, and the knives X to approach one another and cut off the glass from the bottom of the mould V. The movement of the piston 18 uncovers a port 16 and admits air between the pistons 8 by way of a pipe 15, 14. The pistons 8 separate and open the mould halves V while at the same time they uncover ports 12, Fig. 9, and allow air to pass by way of a pipe 13, D to the underside of the piston F. This raises the piston F, which on reaching the top of the cylinder A, uncovers a port B', through which the air passes to the small cylinder B and raises the piston J. The neck mould I is thus raised to its original position, carrying with it the suspended parison, and the plunger M is withdrawn as shown in Fig. 4. The compressed air in the cylinder A is prevented from entering the parison through the holes G<1> and hollow rod G by a valve N. The finishing-mould S, Figs. 1 and 8, is then closed round the parison by the action of a cam Z' which is rotated by a motor &c. about a shaft Z. The same cam also draws back the slide U<3> so as to bring the mould bottom U into its proper position. The mould bottom and the halves of the finishing-mould are formed with a double wall,the inner one S<1> being perforated, and the spaces between the walls are connected by a passage. The air is exhausted from these spaces and also from the interior of the mould by way of the perforations. Air at atmospheric pressure enters the parison through a spring valve H<1>, Fig. 4, and expands it to fill the finishing-mould. The moulds are then opened and the finished article removed as usual. In a modification, a small longitudinal groove is cut in the interior of the hollow rod Gin the neighbourhood of slide L which carries the plunger M. At the moment when the plunger M is withdrawn, a small amount of compressed air escapes past the slide L by way of the groove and expands the parison to a small extent.