Patent GB-190523833-A (GB)
Title: Improvements in and in connection with Sand Moulding Machinery.
Inventor: PATCHELL WILLIAM JOHN
Filed: 1905-11-18
Granted: 1906-01-25
Abstract: 23,833. Patchell, W. J. Nov. 18. Moulding. - Sand - moulding plant comprises a reciprocating ramming- head having a number of cylindera containing pistons under fluid pressure, and carried by a guide-frame adjustable by power to correspond to the height of flask employed without changing the length of stroke of the head or relative arrangement of other parts carried by the head and actuated by the rammerreciprocating mechanism, namely, a sand-sifting riddle, and venting-needles ; a scraper vertically and obliquely adjustable for removing and delivering surplus sand from the flask ; and means for lifting and turning over the flask-carrying frame mounted so as to be swung aside when the latter is to be removed. Fluid pressure of different degrees may be applied to different sets of pistons as required by the contour of the pattern. A frame C, Figs. 1, 2, and 3, is adjustable on guides carried by end standards A, B, and sleeves T engaging fixed screws T<3>, and rotated by bevel-gearing from a shaft S driven in either direction according to the position of clutches U through pinions meshing with wheels G<1>, G' geared to a motor shaft F<1>. The ramming-head D slides on guides within the frame C and is formed with a plurality of rows of cylinders d<2>, Fig. 3, arranged in sets of three, each set communicating with a separate chamber in a cap-piece D<2> connected by links to crank-pins on the wheels G<1>, G<2>, and carrying cylinders J, J<1> supplied by flexible pipes with compressed air at about eighty and twenty pounds pressure respectively. Each chamber has valve connexions to either cylinder and to the atmosphere, to enable the piston to be held down under either pressure and to be held up out of the way when not required. The rammers have enlarged ends and squared stems working through holes in a guideplate K. A sifting-riddle, R<2> is supplied with sand by a conveyer, and passes sand down to the flask by a hopper (not shown). The riddle is reciprocated by rods r<3> and eccentrics r' on a shaft gearing directly'with the wheels G', G<2>, and is provided with rollers r<2> running on tracks formed by brackets projecting from the frame C. Venting-needles V<5> work in guides in a cross-bar supported by the standards A, B, and are adjustably clamped by screws v<5> and a bar carried by the ramming - head. The scraper S<8> is pivotally mounted at s<10>, braced by a rod S", and jointed at the other end to rods S<10> adjustably clamped in pivoted sleeves for the angular adjustment. Vertical adjustment is effected by a rod sliding on the bars s<19>, s<9>. The scraper may deliver the surplus sand into a hopper whence a conveyer leads to a storage tank. The crank-pin on the wheel G<1> carries a cheek N to rotate the bevelgearing n<2>, transmitting motion through a sliding pinion p and vertical shaft to a pinion R<1> meshing with a rack formed on the mould carriage. The wheel n<2> is mutilated to produce a progressive movement of the mould carriage step by step after each descent of the rammers. At the exit end of the machine for the mould carriage, rails W<4>, Fig. 11, supported on columns, carry a shaft W<6> rotated through a clutch and worm gearing W<12>. A braced frame W<8> is mounted to swing about the shaft W<6>, and has guides for rack-bars W<9> engaging pinions on the shaft and having open box-ends to receive trunnions on the flask or frame. Bevelgear and a clutch w<13> enable the shaft W<6> to rotate the wheel W<16>, rotatably confined in the end of a rack-bar and having a square hole and pin W" to turn over the mould by its correspondingly recessed trunnions. The flask may be mounted directly on the carriage or may be carried by a channel-section frame Y containing I-beams y' with clips which are driven along at y<5> to engage the lower flange of the flask. The frame W<8> and bars W<9> are swung aside when the carriage is to be moved. The mould support may be fixed in position, and the framework carrying the operating mechanism may be arranged to travel.