| 摘要 |
1498926 Cleaning tyre moulds GOODYEAR TIRE & RUBBER CO 23 March 1976 [17 April 1975] 11685/76 Heading B5A Apparatus for cleaning a tyre mould part comprises a cylindrical steel tank 12 heated externally by a steam jacket 36 and containing an abrasive-free cleaning liquid 14. Projecting upwardly through the centre of the tank is a hollow post 70 over which a lifting frame 60 is received, the periphery of the lifting frame being supported upon a ring gear 42. The ring gear is supported upon a top flange 42 of the tank by a bearing and is slowly driven (less than 1 ft. per minute) by a pinion 46 itself driven through shafts 48 and 52 by a motor 56. Bolted to the underside of the frame 60 is the top wall 130 and side wall segments 82 of a tyre mould and a series of ultrasonic sources 100 are adjustably supported from post 70 in such a way as to direct ultrasonic vibration on to the working surface of the mould parts as they rotate with no part of the surfaces being shadowed by another part. Electrical leads 120 are fed to the ultrasonic sources via the interior of the post 70 which has a conical upper surface 44 to ensure easy placement of the lifting frame. Cleaning liquid is fed to and taken from the tank via inlet 32 and outlet 34 and an overflow 30 is provided. In a variation, (see Fig. 5) the bottom wall of a tyre mould is suspended by a lifting frame in a tank of cleaning liquid and treated with ultrasonic vibrations from sources 100<SP>1</SP> fixed to the underside of the tank around the post 70.
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