Die applicable to deflection of small and long cantilever

Abstract

The invention relates to the technical field of die processing, in particular to a die applicable to the deflection of a small and long cantilever. The die comprises an upper die body and a lower diebody which are mutually connected, wherein a tongue core is arranged at the middle of the upper die body along the direction from the feeding end to the discharging end of the upper die body, and extends out of the discharging end of the upper die body so as to form a bulge; a first working belt is arranged on the bulge; four flow distributing holes which penetrate through the upper die body are formed in the circumferential surface of the feeding end of the upper die body and uniformly distributed around the tongue core; flow distributing bridges are arranged among the flow distributing holes; and a welding chamber, a second working belt, a lower die clearance groove and a discharging port are sequentially arranged on the lower die body along the direction from the feeding end to the discharging end of the lower die body. The die provided by the invention has the following beneficial effects: by adoption of a staggered working belt direct-punching method, the problem that the deflection of a long and small cantilever opening is scrapped can be solved; the metal flow supply balance between the upper die body and the lower die body can be guaranteed; the opening size of a profile produced by adopting the die can be stable; the quantity of deflection waste dies can be reduced; and the qualification rate of die placement onto a machine can be high.

Description

technical field [0001] The invention relates to the technical field of mold processing, in particular to a mold suitable for the deflection of a small and long cantilever. Background technique [0002] In recent years, as high-rise buildings have increasingly become a symbol and feature of a city, the design types of aluminum alloy engineering curtain wall materials have also tended to be special, which requires higher and higher design levels for mold designers. Cantilever opening aluminum alloy curtain wall materials are more and more widely used. [0003] The cantilever opening with an opening of 4.2mm and a cantilever length of 24.7mm is not difficult for designers to design curtain wall pipes, but the addition of long and thin opening profiles improves the strength of the design mold and the stability of the extrusion process. Difficulty, this type of mold requires both the balance of metal supply and the strength of the cantilever to meet the support requirements. If ...

AI Technical Summary

Problems solved by technology

[0003] The cantilever opening with an opening of 4.2mm and a cantilever length of 24.7mm is not difficult for designers to design curtain wall pipes, but the addition of long and thin opening profiles improves the strength of the design mold and the stability of the extrusion process. Difficulty, this type of mold requires both the balance of metal supply and the strength of the cantilever to meet the support requirements. If the cantilever support of the lower mold is blindly lengthened to strengthen the cantilever strength, it is easy to cause the metal to flow out and scratch the support, which will also cause the cantilever to deflect.

[0004] If a false tongue core sealing design is used for the small opening, although this design solves the problem of the cantilever deflection waste mold, it often occurs that the small tongue core deflects and the wall thickness is eccentric during the extrusion process, causing the opening size to be unstable and the profile There will also be slag inclusion defects on the surface, which makes maintenance difficult and the pass rate of the machine is low. In practice, the number of matching modules is large

[0005] In addition, if the method of cross-bridge blocking the opening is used to avoid the design method of metal rushing directly to the cantilever, although the problem of the cantilever’s frontal pressure is solved, the flow pattern of the metal passing through the cantilever is reduced, and the pressure of the cantilever is increased under the metal accumulation bridge. Compressive stress, and high requirements for processing symmetry, unbalanced metal distribution on both sides will easily lead to deflection and scrapping. In practice, the number of lower dies is relatively large.

Images