Patent GB-702714-A (GB)
Abstract: 702,714. Moulding-machines. TACCONE PNEUMATIC FOUNDRY EQUIPMENT CORPORATION. Jan. 2, 1952, No. 146/52. Class 83 (1) A moulding-machine comprises an open-ended sand-receiving member to which a mould box may be secured, means for sliding the member and mould box along the machine table to a position beneath a sand hopper. and then to a position beneath a vertically reciprocable pattern support, and means for moving the pattern down into the mould box and for operating an upwardly moving plunger into the member to pack the sand around the pattern. The machine frame comprises a base 1, table 3 with lateral extensions 4, 5 and a cross member 9 supported by columns 7, 8 bolted to the base 1 and carrying a sand hopper 12 and an overhanging extension or head 10. Slidable on the table is a member 35 having an open-ended sand receiving chamber, an extension 51 carrying rollers 52 for supporting a bottom plate 53 and at the other side an extension having a pressure-fluid cylinder 64 within which is a piston 65 for reciprocating a cutting plate 76 across the bottom of the mould box. The member 35 is moved by a pressurefluid cylinder 40. The head 10 carries patterns 28 secured to a plate 29 integral with a piston 22 which may be moved down by pressure fluid supplied at 26 to a cylinder 14 and raised by fluid supplied at 23 to a cylinder 16 containing a piston 18. Vertically beneath the plate 29 is a sand ramming device comprising a piston 114 secured to the base 1 and carrying a cylindrical plunger 113 movable upwards by compressed fluid supplied through passages 116, 118. The upper part of the plunger is cup-shaped and across it is secured a rubber or like obtruding member 125 which can be inflated by fluid from a hose 127. The lower part of the plunger carries four piston shafts 104 on which slide cylindrical portions of side ramming members 101 which are raised by pressure fluid from hoses 107. In operation, the member 35 and a mould box 54 held in position thereon between an abutment 82 and a plunger 57 which is raised to locking position by compressed fluid, are moved beneath the sand hopper as shown in Fig. 2 and after being filled are moved to the right-hand position shown in Fig. 3. Here, the plate 29 is lowered on to the top of the mould box and the sand is pressed around the pattern by inflating the member 125, raising the plunger 113 and finally by operating the side ramming members 101. A latch pin 87 secured to a piston 84 is actuated to release the cutting plate 76 which is moved across the bottom of the mould box and then returned to its original position. Next, the ramming devices are lowered, the latch 57 released and the member 35 moved to its position beneath the hopper, the bottom board 53 on the extension 5 being thus brought beneath the mould box from which the pattern is lifted. Rollers 52, supporting the bottom board 53, are then in alignment with roller conveyors 150, 151 on which empty boxes are moved to the machine and completed moulds are moved away. The supply of compressed fluid to the various cylinders is controlled manually in the machine shown, but could be arranged for automatic control. The pipes supplying fluid to the ramming devices 125, 113, 101 may include automatic pressureadjusting devices to ensure uniform compacting of the moulds. Making cores.-The machine may also be used for making cores.