Aluminum profile hot extrusion divergent die

Abstract

The utility model discloses an aluminum profile hot extrusion divergent die, and belongs to the technical field of aluminum profile hot extrusion. The die mainly comprises an upper die and a lower die which are matched with each other, at least one joint line is arranged on the outer side walls of the upper die and the lower die, the joint line is parallel to the axis of the upper die and the axis of the lower die, a round liquid inlet groove coaxial with the axis of the upper die is formed in the upper end face of the upper die, and a middle flow dividing hole and a plurality of outer flow dividing holes are formed in the liquid inlet groove. A die core is arranged at the lower end of the upper die, a center hole communicated with the middle flow dividing hole is formed in the middle of the die core, connecting channels communicated with the middle flow dividing hole are formed in the four side faces of the die core respectively, and flow guide grooves corresponding to the connecting channels are formed in the lower end of each outer side flow dividing hole respectively. The material uniformizing plates matched with the radiating fin holes are additionally arranged on the left side and the right side of the lower working belt respectively, the material uniformizing plates can play a material blocking role, it is guaranteed that enough molten aluminum passes through the radiating fin holes, and therefore it is guaranteed that the wall thickness in the radiating fin holes can reach the standard.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum profile hot extrusion, and in particular relates to an aluminum profile hot extrusion splitter die. Background Art

[0002] The hot extrusion manifold die is a common processing equipment for aluminum profiles with closed channels inside. The manifold die is mainly composed of an upper die and a lower die. The upper die is composed of a die core, a manifold bridge and a manifold hole, and the lower die is composed of a welding chamber, a working belt and a die hole. During the use of the manifold die, if the manifold design is unreasonable or the stress concentration inside the die is high, the manifold die may explode. When hot extruding heat dissipation products, it is not easy to control the wall thickness at the heat dissipation teeth, resulting in unstable product quality.

[0003] The patent with authorization announcement number CN216226198U discloses a hot extrusion die for an aluminum alloy heat sink pipe, which can divert and extrude the heated aluminum rod into a tube through the core inside the upper die, and the aluminum tube then passes through the tooth grooves inside the lower die to form an external radial heat sink. The upper die and the lower die can be conveniently disassembled and assembled by bolts, and the lower die is strengthened and protected by the coordinated use of the first reinforcement ring and the second reinforcement ring, thereby achieving the advantages of a long service life, a relatively simple structure, and reduced deformation of the device.

[0004] Although the above patent solves the problem of easy installation and small deformation of the mold, the heat dissipation product has high requirements on the precision of the split mold. The above structure still has the following problems: 1. The upper mold and the lower mold are prone to misalignment after being used for a period of time. After the heat dissipation product has a slight misalignment between the upper mold and the lower mold, the product error is large, resulting in a significant reduction in the product qualification rate; 2. The heat dissipation product has high requirements on the uniformity of the aluminum liquid discharge. The uneven aluminum liquid discharge will cause the wall thickness at the heat dissipation teeth to deform. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide an aluminum profile hot extrusion splitter die, which respectively adds equalizing plates matched with multiple heat sink holes on the left and right sides of the lower working belt, and the equalizing plates can play a material blocking role to ensure that there is enough aluminum liquid passing through the heat sink holes, thereby ensuring that the wall thickness in the heat sink holes can meet the standards.

[0006] The aluminum profile hot extrusion diversion die comprises a matching upper die and a lower die, both of which are cylindrical structures, and at least one joining line is commonly provided on the outer side walls of the upper die and the lower die, and the joining line is arranged parallel to the axis of the upper die and the lower die, and a circular liquid inlet groove coaxially arranged with its axis is provided on the upper end surface of the upper die, and a middle diversion hole and a plurality of outer diversion holes are provided on the liquid inlet groove, a die core is provided at the lower end of the upper die, and a center hole connected to the middle diversion hole is provided in the middle of the die core, and connecting channels connected to the middle diversion hole are respectively provided on the four sides of the die core, and a guide groove corresponding to the connecting channel is respectively provided at the lower end of each outer diversion hole.

[0007] Preferably, the middle shunt hole is arranged in the middle of the liquid inlet groove and is coaxial with the liquid inlet groove, and the plurality of outer shunt holes are evenly distributed near the outer circumference of the liquid inlet groove.

[0008] Preferably, an upper welding chamber is provided at the bottom of the upper mold, and a first positioning rod and a second positioning rod are respectively provided outside the upper welding chamber, and the first positioning rod and the second positioning rod are both staggered with different radii with the center of the circle of the upper mold as the center.

[0009] Preferably, there are two first positioning rods and two second positioning rods, and the lower ends of the first positioning rods and the second positioning rods are both provided with a 30° chamfer. The lower mold is respectively provided with a first positioning hole and a second positioning hole that cooperate with the first positioning rod and the second positioning rod, and the upper end surfaces of the first positioning hole and the second positioning hole are both provided with a 30° chamfer.

[0010] Preferably, the lower mold is provided with a mold hole matching with the mold core, a plurality of heat sink holes are respectively opened on the left and right sides of the mold hole, a lower working belt is provided around the upper part of the mold hole, and material equalizing plates matching with the plurality of heat sink holes are respectively provided on the left and right sides of the lower working belt, and the material equalizing plate and the lower working belt have a smooth transition.

[0011] Preferably, both front and rear ends of the lower working belt are arc structures.

[0012] Preferably, the middle flow-dividing hole and the plurality of outer flow-dividing holes are smoothly transitioned to the liquid inlet groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Add multiple joining lines coaxial with the diverter die on the outer side walls of the upper and lower dies. The joining lines facilitate observation of whether the upper and lower dies are misaligned after being joined. If misalignment occurs, the diverter die can be repaired in time to avoid re-repairing the diverter die after the extruded aluminum material is found to be unqualified after processing, thus reducing the cost of trial and error.

[0015] 2. A guide groove corresponding to the corresponding connecting channel is opened at the lower end of each outer diversion hole. The guide groove allows the heated aluminum liquid to fully enter the connecting channel to the maximum extent, thereby ensuring the required wall thickness of the product.

[0016] 3. Add the first positioning rod and the second positioning rod which are staggered with different radius tracks to avoid the misalignment between the upper die and the lower die as much as possible, ensure the accuracy of the aluminum alloy product, reduce the error and improve the product quality.

[0017] 4. Material balancing plates matching multiple heat sink holes are respectively provided on the left and right sides of the lower working belt, and the material balancing plates have a smooth transition with the lower working belt. The material balancing plates can act as material barriers to ensure that sufficient aluminum liquid passes through the heat sink holes, thereby ensuring that the wall thickness in the heat sink holes meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the splitting of the upper die and the lower die of the utility model;

[0020] Figure 3 The figure is a schematic diagram of the three-dimensional structure of the upper mold when viewed from above;

[0021] Figure 4 Schematic diagram of the upper die from bottom view;

[0022] Figure 5 Schematic diagram of the three-dimensional structure of the lower mold.

[0023] In the figure, 1. upper mold; 101. middle diversion hole; 102. outer diversion hole; 103. mold core; 104. center hole; 105. connecting channel; 106. guide groove; 107. first positioning rod; 108. second positioning rod; 109. liquid inlet groove; 2. lower mold; 201. first positioning hole; 202. second positioning hole; 203. lower working belt; 204. mold hole; 205. heat sink hole; 206. material equalizing plate; 3. parting line. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] like Figures 1 to 5As shown, a hot extrusion diverter die for aluminum profiles comprises a matching upper die 1 and a lower die 2, both of which are cylindrical structures, and one or more joining lines 3 are provided on the outer side walls of the upper die 1 and the lower die 2, and the joining lines 3 are arranged parallel to the axes of the upper die 1 and the lower die 2. In this embodiment, there are three joining lines 3, and the joining lines 3 are used to observe whether the upper die 1 and the lower die 2 are misaligned after being joined. If misalignment occurs, the diverter die can be repaired in time, so as to avoid re-repairing the diverter die after the extruded aluminum material is found to be unqualified after being used for processing, thereby reducing the trial and error cost.

[0027] The upper end surface of the upper mold 1 is provided with a circular liquid inlet groove 109 coaxially arranged with its axis. The liquid inlet groove 109 facilitates better coordination between the heated aluminum rod and the diversion hole. A middle diversion hole 101 and multiple outer diversion holes 102 are provided on the liquid inlet groove 109. The middle diversion hole 101 and multiple outer diversion holes 102 have a smooth transition with the liquid inlet groove 109. This can reduce the stress concentration at the heated aluminum rod and the diversion hole, and avoid mold explosion or bridge cracking of the diversion mold during the pressurization process.

[0028] The middle flow hole 101 is disposed in the middle of the liquid inlet groove 109 and is coaxially disposed with the liquid inlet groove 109. The plurality of outer flow holes 102 are evenly distributed near the outer circumference of the liquid inlet groove 109. Figure 3 As shown, a mold core 103 is provided at the lower end of the upper mold 1, and a center hole 104 connected to the middle diversion hole 101 is provided in the middle of the mold core 103. The center hole 104 and the middle diversion hole 101 are coaxially arranged, and connecting channels 105 connected to the middle diversion hole 101 are respectively opened on the four sides of the mold core 103. The connecting channel 105 runs through the bottom of the mold core 103, and a guide groove 106 corresponding to the corresponding connecting channel 105 is respectively opened at the lower end of each outer diversion hole 102. The guide groove 106 can maximize the entry of the heated aluminum liquid into the connecting channel 105, thereby ensuring the required wall thickness of the product.

[0029] An upper welding chamber is provided at the bottom of the upper mold 1, and a lower welding chamber matching the upper welding chamber is provided on the lower mold 2. A first positioning rod 107 and a second positioning rod 108 are provided outside the upper welding chamber. In this embodiment, there are two first positioning rods 107 and second positioning rods 108, and the two identical positioning rods are arranged adjacent to each other. Figure 4 As shown, the first positioning rod 107 and the second positioning rod 108 are both centered on the center of the circle of the upper die 1 during processing, and the first positioning rod 107 and the second positioning rod 108 are staggered at different radii. The first positioning rod 107 and the second positioning rod 108 are staggered at different radii to avoid misalignment between the upper die 1 and the lower die 2 as much as possible, thereby ensuring the accuracy of the aluminum alloy product, reducing errors, and improving product quality.

[0030] like Figure 3 and Figure 5As shown, the lower ends of the first positioning rod 107 and the second positioning rod 108 are both provided with a 30° chamfer, and the lower mold 2 is provided with a first positioning hole 201 and a second positioning hole 202 respectively matched with the first positioning rod 107 and the second positioning rod 108, and the upper end surfaces of the first positioning hole 201 and the second positioning hole 202 are both provided with a 30° chamfer. The chamfer structure provides guidance for the upper mold 1 and the lower mold 2 when the mold is closed, so as to facilitate the closing of the mold.

[0031] like Figure 5 As shown, the lower die 2 is provided with a die hole 204 matching the die core 103, and a plurality of heat sink holes 205 are respectively provided on the left and right sides of the die hole 204. The die hole 204 and the heat sink holes 205 cooperate to form the outer contour of the aluminum alloy profile. A lower working belt 203 is provided around the upper part of the die hole 204, and an upper working belt matching the lower working belt 203 is provided on the die core 103. The left and right sides of the lower working belt 203 are respectively provided with equalizing plates 206 matching the plurality of heat sink holes 205. The equalizing plates 206 are welded and fixed to the lower welding chamber, and the equalizing plates 206 and the lower working belt 203 have a smooth transition. The equalizing plates 206 can play a role of blocking the material, ensuring that there is enough aluminum liquid passing through the heat sink hole 205, thereby ensuring that the wall thickness in the heat sink hole 205 can meet the standard. The front and rear ends of the lower working belt 203 are both arc structures. The distance between the middle of the arc structure and the die hole 204 is the farthest, and the closer to the left and right sides of the die hole 204, the smaller the distance between the arc structure and the die hole 204. In this way, the wall thickness of the outer contour of the aluminum alloy profile can be ensured to be consistent, reducing the error.

[0032] When the utility model is in use, the upper mold 1 and the lower mold 2 are accurately positioned according to the positions of the mold line 3, the first positioning rod 107 and the second positioning rod 108, and the first positioning rod 107 and the second positioning rod 108 are inserted into the corresponding first positioning holes 201 and the second positioning holes 202, so that the upper mold 1 and the lower mold 2 are completely molded to form a complete diverter mold. During operation, the diverter die is placed in the die positioning groove of the extruder and fixed. After the extruder heats and pressurizes the aluminum rod, the aluminum liquid enters the middle diverter hole 101 and the outer diverter hole 102 through the liquid inlet groove 109. Part of the aluminum liquid in the outer diverter hole 102 enters the connecting channel 105 through the guide groove 106 and merges with the aluminum liquid in the center hole 104. The other aluminum liquid in the outer diverter hole 102 passes through the gap between the mold core 103 and the mold hole 204 to form the outer contour of the aluminum profile. The aluminum liquid passing through the center hole 104 and the connecting channel 105 forms the internal structure of the aluminum profile, so that four closed channels are formed in the aluminum profile during the extrusion process.

[0033] During the extrusion process, the material distribution plate 206 can play a barrier role, slowing down the speed of the aluminum liquid passing through the heat sink hole 205, thereby ensuring the wall thickness of the aluminum profile heat sink.

[0034] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A hot extrusion splitter die for aluminum profiles, comprising an upper die (1) and a lower die (2) that match each other, wherein the upper die (1) and the lower die (2) are both cylindrical structures, and are characterized in that: At least one parting line (3) is provided on the outer side walls of the upper mold (1) and the lower mold (2), and the parting line (3) is arranged parallel to the axes of the upper mold (1) and the lower mold (2). The upper end surface of the upper mold (1) is provided with a circular liquid inlet groove (109) arranged coaxially with the axis of the upper mold (1), and the liquid inlet groove (109) is provided with a middle flow hole (101) and a plurality of outer flow holes (102). The lower end of the upper mold (1) is provided with a mold core (103), and the middle part of the mold core (103) is provided with a center hole (104) connected to the middle flow hole (101). The four side surfaces of the mold core (103) are respectively provided with connecting channels (105) connected to the middle flow hole (101), and the lower end of each outer flow hole (102) is respectively provided with a guide groove (106) corresponding to the connecting channel (105).

2. The aluminum profile hot extrusion splitter die according to claim 1, characterized in that: The middle flow diversion hole (101) is arranged in the middle of the liquid inlet groove (109) and is coaxially arranged with the liquid inlet groove (109), and the plurality of outer flow diversion holes (102) are evenly distributed at positions close to the outer circumference of the liquid inlet groove (109).

3. The aluminum profile hot extrusion splitter die according to claim 1, characterized in that: An upper welding chamber is provided at the bottom of the upper die (1), and a first positioning rod (107) and a second positioning rod (108) are respectively provided on the outer sides of the upper welding chamber, and the first positioning rod (107) and the second positioning rod (108) are both arranged with different radii offset with the center of the circle of the upper die (1) as the center.

4. The aluminum profile hot extrusion splitter die according to claim 3, characterized in that: There are two first positioning rods (107) and two second positioning rods (108), and the lower ends of the first positioning rods (107) and the second positioning rods (108) are both provided with a 30° chamfer. The lower mold (2) is respectively provided with a first positioning hole (201) and a second positioning hole (202) that match the first positioning rod (107) and the second positioning rod (108), and the upper end surfaces of the first positioning hole (201) and the second positioning hole (202) are both provided with a 30° chamfer.

5. The aluminum profile hot extrusion splitter die according to any one of claims 1 to 4, characterized in that: The lower mold (2) is provided with a mold hole (204) matched with the mold core (103), a plurality of heat sink holes (205) are respectively opened on the left and right sides of the mold hole (204), a lower working belt (203) is provided around the upper part of the mold hole (204), and a material distribution plate (206) matched with the plurality of heat sink holes (205) is respectively provided on the left and right sides of the lower working belt (203), and the material distribution plate (206) and the lower working belt (203) are smoothly transitioned.

6. The aluminum profile hot extrusion splitter die according to claim 5, characterized in that: The front and rear ends of the lower working belt (203) are both arc structures.

7. The aluminum profile hot extrusion splitter die according to claim 6, characterized in that: The middle flow dividing hole (101) and the plurality of outer flow dividing holes (102) are smoothly transitioned to the liquid inlet groove (109).

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