Mold core

Abstract

The invention relates to an element in continuous extrusion equipment, in particular to a mold core used in equipment capable of performing continuous extrusion molding on aluminum cylindrical tubes. A through hole is arranged in the mold core body along the anterio-posterior for cables to pass through, the rear section of the mold core is a cylindrical body, the front end of the cylindrical bodyis provided with a styloid rod with a smaller diameter, the front end of the styloid rod is provided with a valve plate, the peripheral outline of the valve plate is oval, the front face of the valveplate is cone-shaped, a small tube head extending forwards is arranged at the orifice of the through hole, the cylinder of the cylindrical body, which is adjacent to the styloid rod, is provided withtwo dustpan-shaped drainage holes which are arranged in a symmetric manner and are positioned at the rear part of the oval long shaft board of the valve plate, and the valve plate, the styloid rod and the drainage holes encircles into a cavity channel which is arranged in a mold seat, can accommodate flow materials and enables the flow materials to pass through. The mutual match of the shape, path and flow of the mold core enables aluminum liquid arriving at the pipe orifice of the small tube head to be even, thereby providing basic guarantee for obtaining aluminum tubes with even wall thickness.

Description

technical field [0001] The invention relates to a component in continuous extrusion equipment, in particular to a component used in equipment that can continuously extrude aluminum cylindrical tubes. Background technique [0002] Wrapping the insulation shielding layer outside the cable is usually achieved by armoring. In view of the fact that the tape material is used to wrap the cable busbar or core wire in an oblique or spiral manner during armoring, double-layer superposition will appear at the overlapping parts. In this case, the entire shielding layer will inevitably have uneven thickness along the length of the shielding layer, which is not conducive to processing, but also wastes materials and cannot achieve a uniform layer structure. In view of the defects in the above-mentioned prior art, a patent application publication specification of PCT / GB2008 / 003830 for "continuous extrusion equipment" was disclosed on May 22, 2009 (International Publication Day), which discl...

AI Technical Summary

Problems solved by technology

In the above scheme, the bow-shaped structure of the discharge port (27) is a circumferentially arranged groove and then extends axially to communicate with each other. In this way, the thermoplastic aluminum material needs to pass through a section of ""-shaped passage to reach the discharge port (27) , so the aluminum material flow and flow direction on both sides of the discharge port (27) are difficult to be uniform, so that the aluminum material flow and flow direction at the collar (38) and the groove (40) are difficult to maintain uniformity, so in the cable busbar or core The thickness of the aluminum material coated on the line is uneven, which will lead to partial defects of the aluminum tube in serious cases, which will seriously affect the quality of the coated tube, and then affect the quality of the cable or busbar

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