Patent GB-153658-A (GB)
Title: Improvements in or relating to dieing-out machines for producing from sheet materialblanks for parts of boots or shoes
IPC: C14B5/00
Filed: 1919-08-07
Abstract: 153,658. British United Shoe Machinery Co., (United Shoe Machinery Corporation). Aug. 7, 1919. Cutting-out apparatus.-Relates to a machine for cutting out successive rows of heel lifts &c. in staggered relation to each other. The work is fed intermittently by a traversing movement of the die whilst in engagement with the work, and the initial position of the work for each row is determined by two gauges automatically controlled. The machine is started from a treadle and is stopped automatically on the completion of a row of blanks. A die 6, adapted to co-act with a cutting-block 8, is supported on a carrier horizontally slidable on a die support 104 carried by a plunger 106 that is vertically adjustable and adapted to be reciprocated vertically from a cam on a shaft 10. The operative parts are so arranged that, on depression of a treadle 24, the die is raised from its lowest position into engagement with the work, in which position it remains during an horizontal feed movement of the die, a further upward severing-movement being then imparted to the die followed by a return movement to its lowest position. The horizontal reciprocation of the die is effected by the reciprocation of its carrier through a linkwork connexion 126, 122 with a cam on the shaft 10, the mechanism being such as to permit the independent vertical movements of the carrier and to allow for a variable length of feed according to the size of die in use. The die 6 is held between a flange 146 on the carrier and a screw-actuated clamp member 148, and may be provided with spurs 160, adapted to penetrate the work and facilitate the feeding action of the die, and with a blade 164 for severing the waste so as to secure a straight edge to facilitate the gauging of the work for the next row of cuts. The cut-out material passes through the die or to a sloping discharging-surface 162. The work is supported on plates 80, 82 slidably mounted in a support 4, pin-and-slot connexions being provided between the plate 80 and clamp member 148 and between the plate 82 and diecarrier so that the die and plates 80, 82 may reciprocate in unison during the feeding movement of the die, and yet admit of independent vertical movement of the die. Actuation of the treadle 24 also serves to lower the cutting-block 8 on to the work in position for the preliminary portion of the cutting operation. The block 8 is then slightly raised under cam control to permit the feeding movement of the die to take. place, and lowered again for the severing operation. The latter raising and lowering of the block is repeated for the cutting out of a complete row of blanks when the automatic stopping of the machine serves to raise the block to its original inoperative position. The block is mounted for vertical adjustment and for intermittent axial rotation, the latter being effected automatically by mechanism actuated by the vertical movement of the block. A clamping-device 90, 88 serves to retain the work during the return movement of the die and work-supporting plates 80, 82. Gauging mechanism for the work comprises a lateral gauge 92 mounted for parallel movement and end stops 166, 168 operable alternately to secure a staggered relationship between the positions of blanks stamped from adjacent rows. Mechanism is provided for automatically projecting these .stops above the plate 80. Depression of the treadle 24 swings a lever 68 into locking engagement with a spring latch 72 to retain the shaft 10 in continuous rotation although the treadle be released. This movement of the lever 68 actuates mechanism to lower the stop 166 in readiness for the work feed. On completion of a row of punchings, the latch 72 is released and the consequential return of the lever 68 stops the machine and raises the stop 168 in readiness to engage the work for the next row of punchings. Further actuation of the machine lowers the stop 168, and further stoppage of the machine raises the first stop 166 again to its operative position. This sequence of gauging movements is secured from a cam rotated through a quarter of a revolution at a time. When the die clamp 148 is adjusted to suit dies of different sizes, the stop 168 is adapted to be adjusted simultaneously in the same direction half as far again to maintain the distance between the stops at the distance of half the width of the die. A resilient feeler member 272, responsive to the weight of any stock thereon, serves to position the latch 72 to engage and retain the lever 68, whilst sufficient stock for a complete blank remains, but releases this lever to de-clutch the machine as soon as the stock passes thereover. Specifications 2542/75, 10224/02, 10225/02, 10487/02, and 15555/08 are referred to.