Continuous extrusion device

Abstract

The invention relates to a continuous extrusion device, the frame of which is equipped with two extrusion wheels with mutually parallel rotating shafts. Opposite in rotating directions, each of the extrusion wheels has respectively at least one circumferential extrusion wheel groove on wheel rims. And the extrusion wheel grooves are respectively provided with a mating guide base. The guide bases and the extrusion wheel grooves together form extrusion cavities for passing blank materials. A die holder is installed between the extrusion wheels, and a channel is positioned inside the die holder for cables. Holes communicated with the extrusion cavities are symmetrically arranged on two sides of the axial core wire of the die holder along the radial direction. The holes are also communicated with a coated cavity of the die holder, and the outlet of the coating cavity is coated at the periphery of the cable outlet end in the channel. After entering the extrusion cavities, the blank materials for extrusion get into the coated cavity through the holes on the die holder. As the holes are arranged symmetrically along the radial direction of the die holder, so the blank materials for extrusion get into the coated cavity simultaneously from the upper and lower positions of the die holder. Thus, the channel for blank materials is shortened, and the temperature difference is small. With sufficient blank materials passing through the die holder, the device of the invention has increased output.

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 invention relates to a continuous extrusion device, in particular to an extrusion equipment for forming metal through 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 continuous extrusion device has a stru...

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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 continuous extrusion device has a structure of single wheel and single groove or single wheel and double groove, which is relatively simple. , because this equipment has only one runner, and its 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 kind of single wheel, single groove or single The double groove structure of the wheel usually can only produce products with small diameter and small cross section. It is very difficult to produce products with large diameter and the yield is low.

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