| 摘要 |
PURPOSE:To proeduce infinitely a composite wire rod by providing a side chamber in the deep part of a passage formed between a movable wheel and a stationary shoe block, and coating circumferentially a blank material, in a fluid state, for an outside layer to be extruded on a core material, by extrusion, under the pressure changed from a dynamic to static pressure. CONSTITUTION:A blank material to be extruded as an outside layer material is supplied into the opening of a transport passage 13 formed between the endless groove 10 provided circumferentially on a movable wheel 11 and the engaging surface of a stationary shoe block 14. Said wheel 11 is then rotated, and the material is delivered into the passage 13 by the frictional resistance generated by the contact between the groove 10 and the blank material. At the same instant, the flowing direction of the blank material is changed by the side chamber provided in the deep part of the passage 13 and the dynamic pressure is changed to a static pressure. The core material 18 drawn into the side chamber and the blank material are combined and thereafter the combined material is extruded from a die 16. A composite wire rod 20 is thus produced infinitely without any limitation in length and without any seam. |
