Patent GB-1025641-A (GB)
Title: Improvements in or relating to machines suitable for use in the manufacture of shoes
Inventor: CHOICE FRANK COLEMAN
IPC: B29C35/00
Filed: 1961-03-18
Abstract: 1,025,641. Moulding footwear. BRITISH UNITED SHOE MACHINERY CO. Ltd. June 8, 1962 [March 18, 1961], No. 9964/61. Heading B5A. A machine for moulding soles on to shoe bottoms comprises a carrier 196 for a foot 2 on which an upper can be lasted, side moulds 4, 6 and a sole mould 8, a sole mould support being guided for movement by guide means provided by supports for the side moulds. The machine shown is for moulding and vulcanizing soles with heel portions on to two shoes simultaneously, a lower pressure being first applied, followed by a higher pressure. Movement of side moulds 4, 6.-These are releasably secured by bolts 24 to carriers 12, 14 and are moved simultaneously to closed position at both stations by a single movable hydraulic cylinder 84 and piston 90. The cylinder 84 is connected by ears 86 (Fig. 2, not shown) to vertically slidable yokes 58 (Fig. 5, not shown), each of which is connected by links 57 to bell-crank levers 42 pivoted at 44 on the carrier 12. The levers 42 carry cam rolls 46 engaging in cam tracks 48 so that upward movement of cylinder 84 and yoke 58 causes sideways movement of carriers 12. The carriers 14 are linked to the levers 42 by pivoted links 68 and the arrangement is such that although the outer mould carriers are moved a greater distance than the inner ones, the initial movement of the outer ones is at a greater speed. Locating means for side moulds.-The side mould carriers 12, 14 are guided for movement on bearers 26 by means of depending portions 15 of the carriers which receive blocks 70 (Fig. 2) fixed in the machine frame. Tapered locating pins 74 (Fig. 3, not shown) engage in sockets in toe and heel end portions of the side moulds. Movement of upper-supporting feet 2.-Each foot 2 is pivotally supported between side frames 124 which are pivotally supported by pillars 126 (Fig. 2). The pillars 126 are connected to beams 128 secured to hydraulic cylinders 130. Each cylinder 130 has an end cap 140 (Fig. 6, not shown) forming a bore 142 containing a piston 144 whose stem 146 is fixed to a base 148. When oil is supplied to the bore 142 the feet 2 are raised so that shoes can be positioned thereon and then swung downwardly. When the cylinder 84 moves upwardly to close the side moulds 4, 6, pins 172 (Fig. 4, not shown) carried by the cylinder 84 engage rolls 170 carried by bell-crank levers 166 to swing these levers to operate mechanism which causes the feet 2 to descend almost to their operative position. This mechanism comprises slide cams 164 (Fig. 6) connected by links 168 to the levers 166 and having cam faces 162 co-operating with rollers 154 carried by the cylinder 130. The feet 2 assume their final operative positions when the bores 142 are exhausted. Reverse movement of the slide cams 164 is effected by pins 190 on the cylinder 84. Sole mould 8.-This forms a unit with a support block 174 (Fig. 6) removably fixed to a heater block 176 and carrier plate 178 mounted on a ram 134 slidable in the cylinder 130. Each carrier plate 178 is guided in its vertical movements by toe and heel guide arrangements 182 (Fig. 9) and lateral guide members 184 engaging the depending positions 15 of the mould carriers 12, 14. An electric timer (not shown) is provided to control the hydraulic circuit so that a lower pressure is applied by the rams 134 for an initial period followed by a higher pressure for a further period. Construction and mounting of feet 2.-In order to facilitate placing of a shoe thereon, each foot has a heel part 202 (Fig. 2) having a concave surface 204 complementary to a convex surface 206. The heel part 202 is pivotally mounted by means of a carrier 208 having a handle 210. In Fig. 2 the foot 2 in the upper loading position is shown " broken." The feet are locked in their raised and lowered positions by a latch member 214 latching over pawls 226 and 212 respectively (Figs. 7, 8, not shown). The feet 2 are movable independently of each other and each has a counterweight 234. Modification.-Fig. 10 (not shown) shows a modified foot 2<SP>1</SP> having a movable heel member 300, and a modified arrangement for swinging the feet between depending and loading positions.