| 摘要 |
957,770. Tyre press. McNEIL MACHINE & ENGINEERING CO. Oct. 9, 1962 [May 2, 1962], No. 38162/62. Heading B5A. The bottom mould half 21 of a vulcanizing press for automatically curing partially preformed tyres, carries a cylindrical inflatable diaphragm 46 having a plano-convex end wall 48. The lower end of the diaphragm is secured to the mould half by a plate ring 53 and a bead ring 54 which are fixed to the upper end of a hollow cylinder 58. The diaphragm is extended and contracted by raising or lowering the plate 50 which is attached through rod 106 to a piston 105, which is reciprocable within cylinder 58. The upper mould half 20 is suspended by screw threaded members 36, 34 and a support 32, from the underside of a movable cross beam 22, and carries a hollow cylindrical member 125 which telescopes over the upper portion of the extended diaphragm as shown in Fig. 2. In the operation of the machine a partially cured tyre B is deposited around the extended diaphragm, upon the lower bead ring 54, and the press closed until the upper bead of the tyre is engaged by the upper bead ring 126 of mould half 20 (the position shown in Fig. 2). The movement of the cross beam is then halted and the diaphragm inflated, radial expansion of the upper portion being prevented by the cylindrical member 125. Shaft 133, operated by a suitable air bellows and toggle mechanism, is then lowered so that the plate 130, carried at the lower end thereof, forces the upper wall 48 of the diaphragm down until it is substantially level with the upper head ring 126 in which position the diaphragm is free from radial constraint. The press is then fully closed and the tyre completely cured. Specifications 652, 367, 704, 797, 714, 814, 799, 761, 831,768 and 865,447 are referred to.
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