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CN-224208818-U - Ultra-thin wall aluminum extrusion die

CN224208818UCN 224208818 UCN224208818 UCN 224208818UCN-224208818-U

Abstract

The utility model relates to an ultrathin-wall aluminum extrusion die which comprises an upper die, a middle die, a lower die, a pre-stress ring, a cooling channel and a supporting block, wherein a guide hole is formed in the upper die, a die core and a diversion hole which is arranged around the die core are arranged in the bottom center of the middle die, the pre-stress ring is sleeved on the outer sides of the middle die and the lower die and covers the tail ends of the diversion hole and the diversion chamber in the width direction, the cooling channel is arranged in the pre-stress ring and used for injecting cooling liquid to cool the pre-stress ring, and the inner diameter of the supporting block is larger than the aperture of the diversion hole. The utility model counteracts high-pressure impact in the extrusion process by uniformly distributed prestress, effectively inhibits the elastic deformation of the die and improves the yield, and the support block is arranged at the discharge hole of the lower die, so that stable support is provided for the discharge of the aluminum profile, and the bending and deformation of the aluminum profile due to the self weight or extrusion stress can be prevented during the discharge.

Inventors

  • LI WEIBIAO
  • YE JIAN
  • SHEN XIAOLEI
  • LI HUAN
  • LUO JIEJIE
  • WU ZHAOHUA

Assignees

  • 浙江华钇新材科技有限公司

Dates

Publication Date
20260508
Application Date
20250519

Claims (9)

  1. 1. Ultrathin wall aluminium extrusion die, including last mould (1), well mould (2) and lower mould (3), be provided with water conservancy diversion hole (101) in going up mould (1), the bottom center of well mould (2) is equipped with mold core (201) and around shunting hole (202) that mold core (201) arranged, be provided with seam room (301) and discharge opening (302) in lower mould (3), its characterized in that still includes: the prestress ring (4) is sleeved outside the middle die (2) and the lower die (3), and covers the tail end of the shunt hole (202) and the welding chamber (301) in the width direction; The cooling channel (401) is arranged inside the pre-stress ring (4) and is used for injecting cooling liquid to cool the pre-stress ring (4); the support block (5) is arranged at the discharge hole (302) of the lower die (3), and the inner diameter of the support block (5) is larger than the aperture of the discharge hole (302).
  2. 2. The ultra-thin wall aluminum extrusion die as claimed in claim 1, wherein limiting steps (203) are arranged at one end, connected with the middle die (2) and the lower die (3), of the die, and the pre-stressing ring (4) is located between the left limiting step (203) and the right limiting step (203).
  3. 3. The ultra-thin wall aluminum extrusion die as claimed in claim 2, wherein the pre-stressing ring (4) is connected with the middle die (2) and the lower die (3) through interference fit.
  4. 4. The ultra-thin-wall aluminum extrusion die as recited in claim 1, wherein an annular groove (404) is formed in the inner annular surface of the pre-stress ring (4), and the annular groove (404) is located at the joint surface of the middle die (2) and the lower die (3).
  5. 5. The ultra-thin wall aluminum extrusion die as claimed in claim 1, wherein the cooling channels (401) are spirally distributed in the pre-stressing ring (4), and a cooling liquid inlet (402) and a cooling liquid outlet (403) are respectively arranged at the left end and the right end of the pre-stressing ring (4).
  6. 6. The ultra-thin-wall aluminum extrusion die as recited in claim 5, wherein the pitch of the cooling passage (401) is gradually reduced from the split hole (202) to the weld chamber (301).
  7. 7. The ultra-thin wall aluminum extrusion die as claimed in claim 1, wherein a mounting chamber (303) is provided at the rear end of the lower die (3), and the supporting block (5) is provided in the mounting chamber (303).
  8. 8. The ultra-thin-wall aluminum extrusion die as recited in claim 7, wherein a sliding groove (304) is formed in the inner wall of the installation chamber (303), a sliding block (501) is arranged on the outer wall of the supporting block (5), and the sliding block (501) is clamped in the sliding groove (304).
  9. 9. The ultra-thin wall aluminum extrusion die as recited in claim 8, wherein both sides of the supporting block (5) are fixed in the discharge hole (302) by positioning screws (6).

Description

Ultra-thin wall aluminum extrusion die Technical Field The utility model relates to the technical field of aluminum profile forming dies, in particular to an ultrathin-wall aluminum extrusion die. Background The hollow ultrathin wall section is a hollow square section, is widely used as a building decoration material in the home, and needs to be used as a hot extrusion die in the production process of the hollow ultrathin wall section. In the extrusion production process of the ultrathin-wall aluminum profile, the traditional aluminum extrusion die has a plurality of problems, namely the structural strength of the die is insufficient, the die is easy to cause elastic deformation in the high-temperature and high-pressure environment in the extrusion process, particularly in the area of a shunt hole and a welding chamber, so that the profile is uneven in wall thickness, low in yield and poor in discharging stability, namely the ultrathin-wall profile is easy to bend and kink due to dead weight or residual stress after extrusion, and the straightness of the profile is difficult to meet the high-precision requirement due to the lack of an effective supporting structure in the existing discharging hole. In the prior art, for example, chinese patent publication No. CN219274098U discloses a thin-wall large-section aluminum extrusion die, which adjusts the angle and the size of a split cavity, reduces the pressure on a lower die by increasing the cross-sectional area of the split cavity close to one end of the lower die, avoids die damage caused by overlarge die compression, but still has the problems, so that an extrusion die with high rigidity and stable discharging characteristics is needed to meet the high-precision and long-life production requirements of ultra-thin-wall aluminum profiles. Disclosure of utility model The utility model aims to provide an ultrathin-wall aluminum extrusion die for solving the problems in the background art. The technical scheme is that the ultrathin-wall aluminum extrusion die comprises an upper die, a middle die and a lower die, wherein a diversion hole is formed in the upper die, a die core and a diversion hole which is arranged around the die core are arranged in the center of the bottom of the middle die, a welding chamber and a discharge hole are formed in the lower die, and the ultrathin-wall aluminum extrusion die further comprises: The prestress ring is sleeved on the outer sides of the middle die and the lower die, and covers the tail end of the split flow hole and the welding chamber in the width direction; The cooling channel is arranged inside the prestress ring and is used for injecting cooling liquid to cool the prestress ring; The support block is arranged at the discharge hole of the lower die, and the inner diameter of the support block is larger than the aperture of the discharge hole. Preferably, the end, where the middle die and the lower die are connected, is provided with a limiting step, and the pre-stress ring is located between the left limiting step and the right limiting step. Preferably, the prestress ring is connected with the middle die and the lower die through interference fit. Preferably, an annular groove is formed in the inner annular surface of the prestress ring, and the annular groove is located at the joint surface of the middle die and the lower die. Preferably, the cooling channels are spirally distributed in the prestress ring, and the left end and the right end of the prestress ring are respectively provided with a cooling liquid inlet and a cooling liquid outlet. Preferably, the pitch of the cooling channel gradually decreases from the split hole to the weld chamber. Preferably, an installation chamber is arranged at the rear end of the lower die, and the supporting block is arranged in the installation chamber. Preferably, a sliding groove is formed in the inner wall of the accommodating chamber, a sliding block is arranged on the outer wall of the supporting block, and the sliding block is clamped in the sliding groove. Preferably, the two sides of the supporting block are fixed in the discharging hole through positioning screws. The utility model has the beneficial effects that: The prestress ring covers the tail end of the shunt hole and the welding chamber area, high-pressure impact in the extrusion process is counteracted by uniformly distributed prestress, the elastic deformation of the die is effectively restrained, the uniformity of the wall thickness of the profile is ensured, the surface ripple defect is reduced, and the yield is improved; The supporting block is arranged at the discharge hole of the lower die, the inner diameter of the supporting block is larger than the aperture of the discharge hole, stable support is provided for the discharge of the aluminum profile, the aluminum profile can be prevented from bending and deforming due to self weight or extrusion stress during the discharge, the dimensional accuracy and s