GB362292A - An improved process and apparatus for pressing a non-circular sheath on to cables and for extruding non-circular tubes - Google Patents

Abstract

362,292. Squirting. SOCASO, Ltd., 10A, Spl³genstrasse, St. Gallen, Switzerland. March 23, 1931, No. 8951. Convention date, March 22, 1930. [Class 83 (iv).] A tube-forming extrusion press, more particularly for lead-sheathing cables, comprises a reshaping member beyond the die and mandrel which engages the metal while it is still following a conical path. A sheath 3, Fig. 1, for a core 4 is formed between a die 2 and a mandrel 1 both of circular cross section, and is then engaged by a shaping member 7 which changes in its length from a circular cross section to that desired. The final form may, for example, be substantially triangular such as that shown in Fig. 4, other examples being illustrated in the Specification. The shaping member 7, Fig. 6, may be rotated in accordance with the rotation of a disc 10 shaped to engage the cable, in order that variations in pitch with a lag corresponding to the time taken by the cable to travel between the members 10, 7 may be compensated for. The feed of the cable rotates a disc 11 and, through gearing, a disc 13, half a revolution of which corresponds to the required lag, the disc carrying latches 14 which are rocked by pins 17 on a disc 16 rotated from the disc 10. Those latches which are rocked actuate a ratchet mechanism to release an independently driven disc 15 which drives the shaping member 7. Electrical relays may replace the mechanical transmission. The disc 10, in a modification, may be integral with a gauge which rectifies small irregularities and transmits its motion to the member 7, or to an auxiliary member with which the shaping member is driven synchronously. Other modifications employing indicating devices with which the shaping member is synchronized are described.