Aluminum profile extrusion die capable of avoiding generation of welding line

Abstract

The utility model discloses an aluminum profile extrusion die capable of avoiding the generation of welding lines, which comprises a die body, the die body comprises an upper die and a lower die which are in close fit with each other, a shunting bridge and a plurality of shunting holes separated by the shunting bridge are arranged in the upper die, the shunting bridge comprises a bridge body and a plurality of shunting holes distributed around the bridge body, the bridge positions are arranged on the upper die and connected with the inner wall of the upper die, the lower clearance cutter is connected with the end of the bridge body, the working tape is connected with the lower clearance cutter, and a right-angle section is reserved on the feeding face of each bridge position. According to the utility model, the right-angle section and the inclined surface are arranged, the depth of the lower clearance is equal to the width of the forming gap, and the fillet surface is arranged in the secondary welding chamber, so that aluminum flow is kept in a uniform and stable flowing state in each part of the die body, the aluminum flow can be fully welded, the generation of a welding line is avoided, and the production efficiency is improved. And the surface quality of the aluminum profile is guaranteed, and production is facilitated.

Description

Technical Field

[0001] The utility model specifically relates to an aluminum profile extrusion die which can avoid the generation of welding lines. Background Art

[0002] In the aluminum extrusion processing industry, aluminum alloy has low density, high strength, good plasticity, good extrusion formability, excellent conductivity, thermal conductivity and corrosion resistance, and is safe and recyclable. Therefore, it is widely used in technical fields such as construction, electric vehicles, ships, aerospace, etc. At present, the production of aluminum profiles is usually completed by hot extrusion using molds at high temperatures. Different aluminum profiles have corresponding hot extrusion molds, thereby producing different profiles.

[0003] In the existing aluminum profile extrusion die, when the aluminum flow flows from the upper die diversion hole to the lower mold cavity, its flow speed will be disturbed by many aspects, and uneven distribution and unstable flow often occur. This will cause the surface welding of the aluminum profile to be insufficient during molding, and welding lines are likely to appear on the surface, affecting production quality.

[0004] Therefore, it is necessary to invent an aluminum profile extrusion die that can avoid the generation of welding lines to solve the above problems. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes an aluminum profile extrusion die which can avoid the generation of welding lines. By setting a right-angle section and an inclined surface, and the depth of the lower empty knife is equal to the width of the forming gap, and a rounded surface is provided in the secondary welding chamber, the aluminum flow can maintain a uniform and stable flow state everywhere in the mold body, so that the aluminum flow can be fully welded, avoiding the generation of welding lines, ensuring the surface quality of the aluminum profile, and facilitating production, so as to solve the above-mentioned problems.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an aluminum profile extrusion die capable of avoiding the generation of welding lines,

[0009] The mold body comprises an upper mold and a lower mold which are tightly matched with each other;

[0010] The upper mold is provided with a shunt bridge and a plurality of shunt holes separated by the shunt bridge.

[0011] The diverter bridge includes a bridge body, a plurality of bridge positions distributed around the bridge body and connected to the inner wall of the upper mold, a lower hollow knife connected to the end of the bridge body, and a working belt connected to the lower hollow knife;

[0012] Wherein, the feeding surface of each bridge position is reserved with a right-angle section, and inclined surfaces are arranged on both sides of the discharging surface;

[0013] The lower die comprises a welding chamber opened on the side of the lower die, a mold cavity connected to the welding chamber, and a molding gap is formed after the working belt is inserted into the mold cavity, which is used for hot extrusion production of aluminum profiles;

[0014] The welding chamber comprises a primary welding chamber adjacent to the upper mold and a secondary welding chamber adjacent to the cavity, and the peripheral side walls of the secondary welding chamber are both provided with rounded corners.

[0015] Preferably, the two inclined surfaces on each bridge position are symmetrically distributed about the center plane of the bridge position, and the angle of the inclined surface is set to 30-35 degrees, and the thickness of the end of the bridge position located on the inclined surface is ≤2mm.

[0016] Preferably, a discharge hole is provided on a side surface of the lower die away from the welding chamber, and the discharge hole is connected with the welding chamber through the mold cavity and is used for extruding the formed aluminum profile.

[0017] Preferably, the depth of the lower air knife is equal to the width of the forming gap.

[0018] Preferably, the depth of the welding chamber is set to 3.5-4.0 times the width of the forming gap.

[0019] Preferably, the chamfer range of the fillet surface is set to 20-30 degrees.

[0020] Preferably, the cross section of the discharge hole is arranged to be stepped, and the width of the outlet on the side away from the cavity is greater than the width of the outlet on the side close to the cavity.

[0021] Compared with the prior art, the above technical solution of the utility model has the following beneficial effects:

[0022] The utility model arranges a right-angle section on the bridge position of the feed surface so that the aluminum flow can quickly and smoothly enter the diversion hole; the design of the inclined surface on the discharge surface reduces the resistance encountered by the aluminum flow when flowing out of the diversion hole, so that the aluminum flow flows into the lower mold evenly and stably; the depth of the lower air knife is equal to the width of the forming gap, so that the bridge space of the discharge surface is increased, which can provide sufficient space for the aluminum flow, so that the aluminum flow can fill the cavity evenly and stably; the rounded surface in the secondary welding chamber can guide the flow of the aluminum flow, reduce the formation of eddy currents and dead zones, so that the flow velocity of the aluminum flow is even and stable when leaving the welding chamber, and the aluminum flow is fully welded; in summary, the mold body can ensure that the aluminum flow can flow evenly and stably through the upper mold to the lower mold, so that the aluminum flow can be fully welded, avoiding the generation of welding lines, ensuring the surface quality of the aluminum profile, and facilitating the production of the aluminum profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a half-section view of the utility model;

[0026] Figure 3 It is a cross-sectional view of the utility model;

[0027] Figure 4 This is a schematic diagram of the upper mold structure of the utility model;

[0028] Figure 5 It is a schematic diagram of the lower mold structure of the utility model.

[0029] Description of reference numerals:

[0030] 1 mold body;

[0031] 100 upper mold, 101 diverter bridge, 101a bridge body, 101a-1 right angle section, 101a-2 inclined surface;

[0032] 101b bridge position, 101c lower empty knife, 101d working belt;

[0033] 102 diversion hole;

[0034] 200 lower die, 201 welding chamber, 201a primary welding chamber, 201b secondary welding chamber, 201b-1 fillet surface;

[0035] 202 cavity, 202a molding gap;

[0036] 203 discharge hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] The utility model provides Figure 1-5 An aluminum profile extrusion die that can avoid the generation of welding lines is shown, comprising a die body 1, wherein the die body 1 comprises an upper die 100 and a lower die 200 that fit tightly with each other;

[0039] The upper mold 100 is provided with a diverter bridge 101 and a plurality of diverter holes 102 separated by the diverter bridge 101.

[0040] The diverter bridge 101 includes a bridge body 101a, a plurality of bridge positions 101b distributed around the bridge body 101a and connected to the inner wall of the upper mold 100, a lower hollow knife 101c connected to the end of the bridge body 101a, and a working belt 101d connected to the lower hollow knife 101c;

[0041] The feeding surface of each bridge position 101b is reserved with a right-angle section 101a-1, and both sides of the discharging surface are provided with inclined surfaces 101a-2;

[0042] The lower die 200 includes a welding chamber 201 opened on the side of the lower die 200, and a cavity 202 connected to the welding chamber 201. After the working belt 101d is inserted into the cavity 202, a molding gap 202a is formed, which is used for hot extrusion production of aluminum profiles;

[0043] The welding chamber 201 includes a primary welding chamber 201a adjacent to the upper mold 100 and a secondary welding chamber 201b adjacent to the cavity 202. The peripheral side walls of the secondary welding chamber 201b are all provided with rounded surfaces 201b-1.

[0044] In one embodiment, the two inclined surfaces 101a-2 on each bridge position 101b are symmetrically distributed about the center plane of the bridge position 101b, and the angle of the inclined surface 101a-2 is set to 30-35 degrees. The thickness of the end of the bridge position 101b located on the inclined surface 101a-2 is ≤2mm, so that the size of the bridge position 101b located on the discharge surface becomes smaller, which can improve the accuracy and consistency of the discharge surface, so that the aluminum flow is relatively stable and uniform when passing through this place.

[0045] In one embodiment, the depth of the lower air knife 101c is equal to the width of the forming gap 202a, which provides sufficient accommodation space for the aluminum flow, reduces the flow restriction of the aluminum flow, and ensures the uniformity and stability of the aluminum flow.

[0046] In one embodiment, the depth of the welding chamber 201 is set to 3.5-4.0 times the width of the forming gap 202a, so as to increase the extrusion force that the welding chamber 201 can withstand, improve the strength of the lower mold 200, and ensure the service life of the lower mold 200.

[0047] In one embodiment, the chamfer range of the fillet surface 201b-1 is set to 20-30 degrees, which can guide the flow of the aluminum flow, reduce the formation of eddies and dead zones, and make the flow rate of the aluminum flow uniform and stable when leaving the welding chamber 201.

[0048] In one embodiment, a discharge hole 203 is provided on a side surface of the lower mold 200 away from the welding chamber 201. The discharge hole 203 is connected to the welding chamber 201 through the cavity 202 and is used for extruding the aluminum profile after molding. The cross-section of the discharge hole 203 is arranged to be stepped, and the width of the outlet on the side away from the cavity 202 is greater than the width of the outlet on the side close to the cavity 202, which facilitates the extrusion of the aluminum profile after molding and ensures the integrity of the surface of the aluminum profile.

[0049] The specific implementation mode is as follows: when the utility model is in use, the aluminum flow is evenly divided into several streams under the action of the diverter bridge 101 and enters the upper mold 100 through the diverter hole 102, and during the flow of the aluminum flow, the right-angle section 101a-1 can provide a more direct feeding path for the aluminum flow, so that the aluminum flow enters the diverter hole 102 more smoothly, reducing the resistance and deformation during feeding, so that the aluminum flow can flow stably and quickly toward the lower mold 200;

[0050] The 30-35 degree inclined surface 101a-2 and the end thickness less than or equal to 2mm make the bridge position 101b located on the discharge surface smaller, which can improve the accuracy and consistency of the discharge surface, better control the outflow speed and flow rate of the aluminum flow, and at the same time, the design of the inclined surface 101a-2 allows the aluminum flow to flow smoothly, reduces the discharge resistance, avoids aluminum flow blockage and flow turbulence, so that the flow of the aluminum flow is uniform and stable, and can smoothly flow into the lower mold 200;

[0051] At the same time, the depth of the lower hollow knife 101c is equal to the width of the forming gap 202a, so that the bridge position 101b space of the discharge surface is enlarged, which can provide sufficient space, reduce the flow restriction of the aluminum flow, and make the aluminum flow fill the cavity 202 evenly and stably;

[0052] When the aluminum flow reaches the inside of the welding chamber 201 of the lower mold 200, since the secondary welding chamber 201b is provided with a 20-30 degree rounded surface 201b-1, the secondary welding chamber 201b can guide the flow of the aluminum flow, reduce the formation of eddy currents and dead zones, and make the flow velocity of the aluminum flow uniform and stable when leaving the welding chamber 201, and be fully welded. At the same time, it is ensured that the corners in the molding gap 202a that are originally difficult to fill also have enough lead flow to enter, thereby preventing the extruded aluminum profile from having jagged flow interruption, ensuring the integrity of the welding on the profile surface, avoiding the appearance of welding lines when the profile is welded, and greatly improving the qualified rate of extrusion;

[0053] At the same time, the depth of the welding chamber 201 is set to 3.5-4.0 times the width of the forming gap 202a, which can withstand a large extrusion force and reduce the risk of deformation and damage of the lower mold 200 during use, thereby increasing the welding strength of the lower mold 200, ensuring the stability and durability of the lower mold 200, and being able to stably produce more qualified aluminum profiles;

[0054] Finally, the aluminum flow is extruded into an aluminum profile with a satisfactory surface quality in the molding gap 202a under the action of the mold cavity 202 and the working belt 101d, and is extruded through the discharge hole 203, thereby completing the hot extrusion production of the aluminum profile;

[0055] In summary, by providing the right-angle section 101a-1 and the inclined surface 101a-2, the depth of the lower empty knife 101c is equal to the width of the forming gap 202a, and the rounded surface 201b-1 is provided in the secondary welding chamber 201b, so that the aluminum flow can maintain a uniform and stable flow state everywhere in the mold body 1, and finally, the aluminum flow can be fully welded, avoiding the generation of welding lines, ensuring the surface quality of the aluminum profile, and facilitating production;

[0056] This embodiment specifically solves the problem in the prior art that in the current aluminum profile extrusion die, when the aluminum flow flows from the diversion hole 102 of the upper die 100 to the cavity 202 of the lower die 200, its flow speed will be disturbed by many aspects, and uneven distribution and unstable flow will often occur, which will result in insufficient surface welding of the aluminum profile during molding, and welding lines will easily appear on the surface, affecting the production quality.

[0057] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An aluminum profile extrusion die capable of avoiding the generation of weld lines, characterized in that: The mold body (1) comprises an upper mold (100) and a lower mold (200) which are tightly matched with each other; A diversion bridge (101) and a plurality of diversion holes (102) separated by the diversion bridge (101) are arranged inside the upper mold (100). The diverter bridge (101) comprises a bridge body (101a), a plurality of bridge positions (101b) distributed around the bridge body (101a) and connected to the inner wall of the upper mold (100), a lower hollow knife (101c) connected to the end of the bridge body (101a), and a working belt (101d) connected to the lower hollow knife (101c); The feeding surface of each bridge position (101b) is reserved with a right-angle section (101a-1), and both sides of the discharging surface are provided with inclined surfaces (101a-2); The lower die (200) comprises a welding chamber (201) opened on a side of the lower die (200), a mold cavity (202) connected to the welding chamber (201), and a molding gap (202a) is formed after the working belt (101d) is inserted into the mold cavity (202), which is used for hot extrusion production of aluminum profiles; The welding chamber (201) comprises a primary welding chamber (201a) adjacent to the upper mold (100), and a secondary welding chamber (201b) adjacent to the cavity (202), and the peripheral side walls of the secondary welding chamber (201b) are all provided with rounded corner surfaces (201b-1).

2. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 1, characterized in that: The two inclined surfaces (101a-2) on each bridge position (101b) are symmetrically distributed about the central plane of the bridge position (101b), and the angle of the inclined surface (101a-2) is set to 30-35 degrees, and the thickness of the end of the bridge position (101b) located on the inclined surface (101a-2) is ≤2mm.

3. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 1, characterized in that: A discharge hole (203) is provided on a side surface of the lower die (200) away from the welding chamber (201); the discharge hole (203) is connected to the welding chamber (201) through the die cavity (202) and is used for extruding the formed aluminum profile.

4. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 1, characterized in that: The depth of the lower hollow knife (101c) is equal to the width of the forming gap (202a).

5. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 1, characterized in that: The depth of the welding chamber (201) is set to be 3.5-4.0 times the width of the forming gap (202a).

6. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 1, characterized in that: The chamfer range of the rounded surface (201b-1) is set to 20-30 degrees.

7. The aluminum profile extrusion die capable of avoiding the generation of weld lines according to claim 3, characterized in that: The cross section of the discharge hole (203) is arranged in a stepped shape, and the width of the outlet on the side away from the cavity (202) is greater than the width of the outlet on the side close to the cavity (202).

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