Novel hand-rail aluminium section hot-extrusion die

Abstract

The invention relates to a novel aluminum profile hot extrusion mould for a hand rail, which is mainly used for the hot extrusion of building hand rail profile. The mould comprises an upper mold (1) and a lower mold (2) which are overlaid front and rear, the feeding surface of the upper mold (1) is provided with five flow-dividing bridges (1.2), five flow-dividing holes (1.1) are formed among thefive flow-dividing bridges (1.2), the middle flow-dividing hole shrinks from large to small, thus forming a large head and a small head, furthermore, the large head is arranged in the center of the feeding surface of the upper mold (1), and the hole is called a direct impact groove flow-dividing hole (1.1.1). The feeding surface of the lower mold (2) is provided with a welding chamber (2.1), the rear of which is provided with a mold cavity (2.3), and the middle of the mold cavity (2.3) is provided with a groove position (2.3.1) which is arranged directly below the large head end of the directimpact groove flow-separating hole (1.1.1). The bottom of the welding chamber (2.1) is provided with an arc-shaped flow-blocking plate (2.3) in an upward convex way along the cavity wall of the mold cavity (2.2). The mould ensures adequate feeding at the groove part of the mold cavity of the lower cavity and the uniform discharging of the extruded aluminum profile, without the problems of hand feeling and welding strips, etc.

Description

(1) Technical field [0001] The invention relates to a hot extrusion die for aluminum profiles. Mainly used for hot extrusion of building railings and handrail profiles. It belongs to the technical field of mold processing. (2) Background technology [0002] Aluminum products have a series of excellent characteristics, such as good strength, good weather resistance, low density, easy extrusion and so on. Therefore, aluminum profiles are widely used in construction and industry. At present, the building railings are not only required to be in good shape, beautiful in appearance, but also durable. The shape of the handrail is: a large semicircle with a groove in the middle with a width of 12.7mm and a depth of 20.5mm, such as Figure 7 shown. At present, such products are often produced with poor surface quality, unformed, difficult to guarantee opening size, and inconsistent profile discharge. Thereby, the production time and production cost are greatly increased. The ma...

AI Technical Summary

Problems solved by technology

The main reason is that the two ends of the feeding surface of a split hole in the middle of the upper mold are the same size, and the split hole deviates from the groove of the lower mold cavity by a certain distance, so that the material in the groove of the lower mold cavity is sufficient. During the extrusion process, the profile will be deformed due to insufficient material supply in the groove or uneven speed when the aluminum material is extruded from the cavity; It is better to cause problems such as hand feeling or welding lines on the surface of the profile

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