| 摘要 |
660,249. Extrusion machines for covering cores with rubber. BRITISH INSULATED CALLENDER'S CABLES, Ltd., RICHARDSON, A. B. F. G., TUNNICLIFFE and FISHER, I. K. March 22, 1950 [March 23, 1949], No. 7970/49. Class 87(ii) The detachable extrusion head 7 is clamped against the extrusion barrel B by means of a screw 15 threaded in a strap 17 welded at 21 to the barrel. The strap comprises two bars 17<SP>1</SP> and an internally threaded sleeve 16 in which the screw works. The barrel part against which the extrusion head is clamped is, as shown, a flanged tube 4 secured by bolts 3 to the barrel proper, and the strap is welded to this tube. The feed screw 2 works in renewable liners 5. The extrusion head has an annular tongue 12 which fits in a groove 13 in the front liner 5, and by this means the head may be angularly adjusted about the barrel axis. The head may be rapidly released by running back the screw 15 to an extent greater than the height of the tongue 12. When something is normally connected to the head, e.g. a vulcanizing chamber or cooling tank, it may be so connected by a quick-release coupling. When the core tube is placed under vacuum and a vacuum seal or gland is provided through which the core is fed into the core tube, the vacuum seal or gland may be connected to the extrusion head by a quick-release coupling. The extrusion head, which is heated by means of passages 33, is described in Specification 665,645.
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