Extrusion system

Abstract

The invention relates to an extrusion system. The rack of the extrusion system is provided with two extrusion wheels of which two spindles are parallel with each other; the rotation directions of the extrusion wheels are opposite, and the wheel ring of each extrusion wheel is provided with at least one extrusion race in the circumference direction; the extrusion races are respectively provided with guide bases which are matched with the extrusion races; the guide bases and the extrusion races form extrusion cavities through which blanks pass; a die seat is arranged between the extrusion wheels; the inside of the die seat is provided with a channel through which a cable passes through; holes communicated with the extrusion cavities are symmetrically arranged on two sides of the axial core wire of the die seat in the radial direction; the holes are communicated with the cladding cavity of the die seat; and the outlet of the cladding cavity is arranged at the periphery of a cable outlet end in the channel. After entering into the extrusion cavity, extrusion blanks enter into the cladding cavity through the holes on the die seat; because the holes are symmetrically arranged in the radial direction of the die seat, the extrusion blanks simultaneously enter into the cladding cavity from the upper and lower parts of the die seat, blank runners are shortened, temperature difference is small, the blank flowing through the die seat is abundant, and the yield is increased.

Description

[0001] The present invention is a divisional application of an invention patent with an application date of July 8, 2009, an application number of 200910144064.8, and an invention title of "extrusion machine". technical field [0002] The present invention relates to an extrusion system, in particular to an extrusion equipment for forming metal by continuous extrusion. Background technique [0003] At present, due to the large diameter of the metal outer sheath of the ultra-high voltage cable, it is generally formed by welding a metal strip, that is, seam welding. The material grains at the welding place of this welding method are coarse and uneven, which affects the electrical and electrical properties of the cable. mechanical physical properties. The continuous aluminum pressing machine produced with aluminum ingots has huge equipment, high energy consumption, complex structure and high cost. However, the traditional continuous extrusion system has a structure of single wh...

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Problems solved by technology

[0003] At present, due to the large diameter of the metal outer sheath of the ultra-high voltage cable, it is generally formed by welding a metal strip, that is, seam welding. The material grains at the welding place of this welding method are coarse and uneven, which affects the electrical and electrical properties of the cable. mechanical physical properties

The continuous aluminum pressing machine produced with aluminum ingots has huge equipment, high energy consumption, complex structure and high cost. However, the traditional continuous extrusion system has a structure of single wheel and single groove or single wheel and double groove. This structure is relatively simple. Since this kind of equipment has only one runner, the extrusion chamber has only one hole communicating with it, so the flow path of the billet in the extrusion chamber is long, resulting in a large temperature difference between the upper and lower sides, and the product qualification rate is low. This single wheel single groove or single wheel The double-slot structure can usually only produce products with small diameters and small cross-sections. It is very difficult to produce products with large diameters, and the yield is low.

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