Patent GB-931796-A (GB)
Title: Improvements in or relating to machines suitable for use in the shaping of end portions of shoe uppers in the manufacture of shoes
Inventor: CARR DERRICK TALBERT
IPC: F16J15/32
Filed: 1958-10-14
Abstract: 931,796. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO. Ltd. Oct. 14, 1959 [Oct. 14, 1958], No. 32684/58. Class 17 (1). A machine for shaping the heel end portion of a Veldtschoen shoe upper has means for simultaneously performing outflanging and moulding operations on said heel portion. The heel portion of the upper is placed over an inner mould 31, Figs. 2 and 3, comprising a front part 33 of low heat capacity material, e.g. epoxy resin, and a heated rear part 35 of metal. A pair of outer-forming members 9 are arranged to close about the upper and exert pressure along the line of a subsequent crease. Members 71 are swung apart to form a flange around the heel portion, the inner mould 31 and outer-forming members 9 moving forward to spread the lower portion of the upper during the flanging operation. The members 71 are then pressed upwards against the underside of the outflanged margin to produce a well-defined crease. For the moulding operation, the upper is clamped against the front part 33 of the inner mould by rubber-faced side members 201, Fig. 5, before the heated rear part 35 is moved rearwards to mould the heel. In operating the machine, initial depression of a treadle 115, Fig. 1, causes, through a system of levers 113, 111, 105 and 103, a slide 5 to move forwardly and downwardly along guideways in the top of the machine. The movement of slide 5 causes members 9, acting about axis X, to swing closed to grip the upper, by the action of levers 17, 21 pivoted about pins 15 mounted in slots on the slide 5, ends 21 of the levers being pivotally secured to spring-loaded rods 25. Further depression of treadle 115 causes rotation of shaft 121 to actuate levers 123, 125 to engage a clutch. The clutch transmits power through a worm 137 and pinion 167 to cam-shaft 139 and by chain to shaft 67 carrying several eccentrics. On rotation of shaft 67 the eccentrics connected with links 109 move slide 5 forwards to close members 9 while an eccentric connected to carrier 41, by a link 65, Fig. 2, moves inner mould 31 forwards a corresponding amount to prevent damage to the upper. During this forward movement flangeforming members 71 are swung apart, by the action of parts 79, 81 and 85 connected to an eccentric on shaft 67 by link 87. The length of link 87 is adjustable by handwheel 251 so that the initial opening of members 71 may be adjusted. After opening members 71 are heated and pressed upwards by the action of cam 141, Fig. 1, on pin 165 connecting toggle links 151, 153 to control slide 163, the toggle links being connected respectively to spring- loaded plunger 155 and plunger 159 connected to members 71. The height of sleeve 77 surrounding plunger 159 is adjustable to suit different thicknesses of upper material. The moulding operation is effected at the same time as the flanging operation, the upper being clamped on to front part 33 of inner mould 31 by members 201, Figs. 3 and 5, actuated by forward movement of slide 5. The slide is connected by arms 217 to bosses 233 on arms 213, said bosses engaging blocks 239 and being urged inwardly to press plungers 211 against members 201. Final clamping pressure is effected by the admission, through a cam-operated valve 236, of compressed air to cylinder 223. Valve 238 admits compressed air to a cylinder 61, Fig. 1, to urge, through links 59, 57, 53, 51, 47 and 45, Fig. 2, heated rear part 35, of mould 31, rearwardly to mould the heel of the upper. The amount of stretch imparted to the upper is limited by the engagement of arm 53 with screw 54 on carrier 41. The clutch is automatically disengaged to permit " setting " of the flange and moulded upper. Depression of the treadle re-engages the clutch to return the parts to their initial positions for removal of the upper.