Patent GB-190814944-A (GB)
Title: Improvements in and relating to Foundry Molding Machines.
Inventor: MOORHOUSE JOHN ROBERT
Filed: 1908-07-14
Granted: 1909-04-22
Abstract: 14,944. Moorhouse, J. R. July 14. Moulding.-Comprises a moulding-machine which performs in succession the operations of ramming, rolling-over, and stripping the pattern during the rotary movement of the working parts of the machine. Figs. 1, 2, and 4 show a moulding- machine having a pair of end frames connected by tie-rods. A swing frame 6 rotates on a shaft 5 and is prevented from moving in an anticlockwise direction by means of screws 14 on a weighted arm 9 pivoted on the shaft 5. The weight 38 is made sufficiently heavy to overbalance the weight of the frame 6, so that the latter tends to rotate in a clockwise direction but is prevented by a spring catch 10 on the arm, which engages the upper side of one of the tie-rods 4. A projection on a pivoted lever 16 on the tie-rod 4 releases the spring catch when the lever is operated by a trip-lever 18. At the other end of the frame 6 is mounted a shaft 7, and a pair of disks provided with cam shaped slots. The pattern plate 8 is fixed to short slotted arms pivoted on the shaft 7 and is recessed to receive an interchangeable stripping-plate 37. The patterns 35 are fixed to a stripping-table 33, and project through the stripping-plate into the flask mounted on the pattern plate. The stripping-table is mounted on a shaft 32 which projects through the slotted arms carrying the pattern plate, and is supported at each end in the cam-shaped slots on the swinging frame 6. The cam-shaped slots are shaped so that they retain the patterns in the sand during the rotation of the flask until the ramming operation is complete, and then withdraw the stripping-table and patterns from the mould thus formed. The ramming-plate 23 is supported by threaded links 22 depending from a cross-bar 21, and may be adjusted to suit flasks of varying size by means of nuts 24. The bar 21 is supported by hand-levers 20 pivoted at 19 to the framework of the machine, while the lower ends of the threaded rods 22 are forked to engage the ends of the shaft 7 to maintain the pattern and press plates in radial alinement during rotation. The ramming and pattern plates rotate about different centres and approach one another during the rotation, as shown by the dotted circles in Fig. 1, until the hand-lever has passed the horizontal position. Further rotation then causes displacement of the frame 6 in an anticlockwise direction until the centres of rotation 7, 19 coincide. The initial distance between the centres of rotation is adjusted by means of the screws 14. As the rotation proceeds, the stripping operation takes place and then the pattern-plate strikes the trip-lever 18 and releases the frame 6, so that the mould takes up the position shown in Fig. 4 where it is supported on the press plate ready for removal. After the mould has been removed, the frame 6 is rotated in an anticlockwise direction until the spring catch 10 re-engages the tie-bar 4. The pattern-plate is then rotated into position and supported on the stop 36 during the operation of mounting the flask thereon and filling it with sand. The press head is then swung up over the pattern plate until the links 22 abut against stops 28 on the plate, and spring catches 39 secure them in position so that the press head, pattern-plate, and stripping-plate are all rotated together in the operation of forming the succeeding mould. If desired, the centres of rotation 7, 19 of the press and pattern plates may be adjusted to coincide, and the ramming operation performed by hand.