Patent GB-376922-A (GB)
Title: Improvements in or relating to machines for moulding stiffeners for boots and shoes
IPC: A43D8/00
Filed: 1931-06-16
Abstract: 376,922. Boot - making machines. PEAKE, E., 6, Abingdon Road, Leicester. June 16, 1931, No. 17446. [Class 17 (i).] In machines for moulding stiffeners for boots &c. wherein a mould is constituted by outer female fcrmers 1 and a central male former 3, all relatively movable, a wiper block 2 being provided for forming a flange on the stiffener, means are provided for positioning a blank 18 between the separated mould elements and for bending it round the male former, and an abutment is provided adapted to contact with the edge of the portion of the blank which is to form the flange so as to determine the extent of its projection from the mould and to position the blank in the mould. The operative parts are driven in timed relationship by lever, link, and cam mechanism from a, cam shaft 17. The male former 3 is mounted on a floating support 14, Fig. 12, on a table 4 vertically movable in guides through mechanism including toggle levers 7, 8, Fig. 2, and a rod 6 having a strong spring connection 16 which yields if the mould pressure exceeds a definite amount. A rod 28 carries a suction nozzle 27 and is rocked to remove a blank 18 from a magazine 19 and reciprocated to bring it to a feed table 36. The latter is carried by a bar 39 secured to sliding rods 40 reciprocated from the shaft 17. The blanks are first placed between horizontal plates 37 and spring fingers 38, Fig. 7, stops 51 limiting the extent whereto they are gripped by the fingers. Movement of the feed table, or of the nozzle only, or both, detaches the blanks from the latter. The blank is then centralized by movable fingers 51a, Fig. 3, and is carried forward by the table 36 into contact with angularly and laterally adjustable pins 52, Fig. 7. The male former then rises and draws the ends of the blank from the spring fingers 38 and by the action of the pins 52 the blank is bent round the male former and is finally pushed between the female formers. The blank is then positioned by the abutment which comprises a plate 55, Fig. 12, pivoted at 56 on a bracket 57 secured to the table 4 and normally urged towards the mould by springs 58. This movement is limited by lock-nuts 59 on a pin 60 being engaged by an extension 55a of the plate 55. Strips 61 hinged at 62 to the plate 55 and adjusted by screws 63, 64, place the blank so that it projects uniformly or more at one end as desired. Tilting, as at the heel, is prevented by spring-controlled pivoted tips 67 on the strips 61. The plate 55 is formed in two sections and is adjustable in height, as by screws 66. Fingers 68 are adapted to engage the legs of the blank and flex them outwards to prevent it being drawn in too much on closing the female formers. The fingers 68 are adjusted by a right and left hand screw 69. To allow the wiper block to operate, the plate 55 is moved away by mechanism 71 .. 80 driven from an. arm 81 of the wiper-operating mechanism. The wiper block is bevelled as at 2a, Fig. 12, and is operated by mechanism 86 .. 90, Fig. 2, from a gear 83 which also drives the cam shaft 17 and meshes with a pinion 85 on the main shaft 84. The female formers are mounted on a pin 91 in a position adjusted by short levers 92 and screws 93, Fig. 1. The pin 91 is carried by a slide 94 secured by a pin 95 to a rod 98 and is raised to move the female formers laterally inward by reciprocating the rod 98, a forked extension 100 on the table 4 engaging a yieldable stop 99 on the rod. Yieldable stops 101 on the table 4 also .engage pivoted levers 102 to force the lower parts of the formers inward. When the blank is being placed in the mould, the plate 55 may be moved away slightly as the male former rises and then brought in again to press the blank into the mould before moulding begins. Mechanism for this comprises a roller 72a on the machine frame being engaged by edges 71a, 71c of a lever 71 attached to the plate 55. The movable fingers 51a may be attached to blocks 121a, Fig. 3, movable by rods 121, 122 connected to a rotatable disc 125 and are normally urged together by a spring 126. They are moved apart by engagement of an arm 127 with a stop 128 as the table reaches its outermost position. For blanks with inclined edges 18a, Fig. 3, the table 36 is adjustably carried by the bar 39, being pivoted to end members 130 and locked in arcuate slots 133 therein. The magazine and suction nozzle may be adjusted to correspond. A finger 104 on a rod 103 is pivoted to a bracket 105 secured on a rod 106 and the rod 106 may be rotated so that a stiffener is removed by the finger 104 in a direction at right-angles to the mould, and the mechanism is so arranged that the rod 103 is then also rotated so as to swing the finger upwards and outwards to jerk the stiffener off. Double operation of the wiper block and prolonged squeezing of the mould may be effected by providing a rod 142 to engage a lug 4a on the table 4 and hold it in operative position while the wiping operation is repeated. The rod 142 is operated by a push rod 139 driven by a cam on a shaft having a gear driven by a pinion on the shaft 17 and making one revolution for every two of the cam shaft 17. The feed table and other mechanism may be likewise arrested, or this effect may be nullified, if desired, by disengagement of the cam or the rod 142. A clutch may be provided for the power shaft, and provision, such as a trip mechanism, may be made for throwing the clutch out if no blank is fed.