Die structure of large-scale section solid aluminum profile

Abstract

The utility model discloses a die structure of a large-scale section solid aluminum profile. The die structure comprises an upper die and a lower die, the upper die is provided with a plurality of vertically-through flow dividing holes, and the flow dividing holes are communicated with the welding chamber of the lower die. A forming chamber is concavely arranged in the welding chamber, and a forming hole vertically penetrating through the lower die is formed in the forming chamber; at least one step is arranged between the outer side of the top edge of the forming hole and the side wall of the forming chamber; the top face of the step is spaced from the top face of the welding chamber, and the side face of the step is spaced from the forming hole. Therefore, firstly, aluminum ingots are shunted through the shunting holes of the upper die, metal after shunting converges in the welding chamber and then enters the forming chamber, and the pressure can be increased; and due to the arrangement of the steps, the friction force of metal flowing is increased, namely, the pressure of metal entering the forming hole is increased, so that the extrusion ratio of a product in the forming hole during forming is increased, the length of the tail shrinkage section of the finally formed solid aluminum profile is shortened, the utilization rate of materials can be greatly increased, the scrap length is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum profiles, in particular to a die structure for a large-scale cross-section solid aluminum profile. Background Technique

[0002] During the extrusion process of aluminum profiles, tail shrinkage generally appears at the end of the extrusion process, that is, it is formed during the turbulent flow extrusion stage. Tail shrinkage will cause the outer layer of metal to flow back. These flowing-back metals usually contain oxides, oil stains and dirt, etc. It destroys the density and continuity of the metal.

[0003] As Figure 1 shown in a solid aluminum profile structure, in the prior art, a flat die is usually used to produce the solid aluminum profile 10. In the actually produced 20-meter solid aluminum profile, about 6 to 8 meters at the tail will have tail shrinkage and an inner and outer layered tail shrinkage section will appear. In the middle layer 101 of the solid aluminum profile in the tail shrinkage section, there are many impurities and various defects. For example, it cannot be normally tapped and formed, and can only be cut off and treated as waste. The rejection rate is high, the material utilization rate is low, and the cost is high. Moreover, the surface of the solid aluminum profile in the tail shrinkage section will also show a coarse crystal phenomenon, which affects the product quality. Content of the Utility Model

[0004] The purpose of the utility model is to provide a die structure for a large-scale cross-section solid aluminum profile, which has the advantages of solving the surface coarse crystal, reducing the rejection rate and improving the material utilization rate.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A die structure for a large-scale cross-section solid aluminum profile, including an upper die and a lower die. The upper die is buckled above the lower die, and a welding chamber is formed at the top of the lower die;

[0007] The upper die has a plurality of shunt holes penetrating up and down, and each shunt hole communicates with the welding chamber;

[0008] The welding chamber of the lower die is recessed with a forming chamber, and a forming hole penetrating the lower die up and down is arranged in the forming chamber. The shape of the forming hole corresponds to the contour shape of the solid aluminum profile;

[0009] At least one step is arranged between the outer edge of the top of the forming hole and the side wall of the forming chamber;

[0010] The top surface of the step is spaced from the top surface of the welding chamber, and the side surface of the step is spaced from the forming hole.

[0011] Further, the forming chamber is in the shape of a long rectangular groove; the forming hole includes a large rectangular hole and two small rectangular holes. The two small rectangular holes are respectively located at the front and rear sides of the large rectangular hole and are respectively communicated with the large rectangular hole; one of the steps is arranged on each of the left and right sides of the large rectangular hole.

[0012] Further, the two small rectangular holes are respectively communicated with the right part of the large rectangular hole; a stop block is respectively arranged on the front and rear sides of the large rectangular hole, and the left ends of the front and rear stop blocks are integrally connected with the front and rear ends of the left step, and the right ends of the front and rear stop blocks are respectively spaced from the two small rectangular holes; and the lengths of the front and rear ends of the left and right steps are equal to the front and rear lengths of the large rectangular hole.

[0013] Further, the center of the large rectangular hole is located at the center of the lower die.

[0014] Further, four shunt holes are circumferentially and spacedly arranged on the upper die; the shunt holes are respectively distributed corresponding to the front, rear, left and right of the forming holes.

[0015] After adopting the above technical solution, when the die structure of this embodiment is used for extrusion molding production of solid aluminum profiles, first, the aluminum ingot is shunted through the shunt holes of the upper die. After shunting, the metal converges in the welding chamber and then enters the forming chamber, which can increase the pressure; and due to the setting of the steps, the friction force of the metal flow is increased, that is, the pressure of the metal entering the forming holes is increased, so as to increase the extrusion ratio when the product is formed in the forming holes, so as to shorten the length of the tailing section of the finally formed solid aluminum profile and solve the problem of surface coarse grains at the same time. After actual measurement, when using the die structure, the length of the tailing section of the 20-meter solid aluminum profile after final forming is less than 0.3 meters; thus, the material utilization rate can be greatly improved, the scrapped length can be reduced, and the cost can be reduced. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the tailing section of a solid aluminum profile;

[0017] Figure 2 It is a perspective view of the embodiment of the present invention;

[0018] Figure 3 It is an exploded view of the embodiment of the present invention;

[0019] Figure 4 It is a top view of the embodiment of the present invention;

[0020] Figure 5 It is Figure 4 The sectional view taken along line A-A of;

[0021] Figure 6 It is a top view of the lower die of the embodiment of the present invention.

[0022] Reference numerals: solid aluminum profile 10, intermediate layer 101, intermediate part 102; upper die 1, shunt hole 11, lower die 2, welding chamber 21, forming chamber 22, forming hole 23, large rectangular hole 231, small rectangular hole 232, step 3, top surface 31 of the step, side surface 32 of the step, stop block 4. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0024] As Figures 2 to 6 shown, a die structure of a large-scale cross-section solid aluminum profile in this embodiment includes an upper die 1 and a lower die 2. The upper die 1 is buckled above the lower die 2, and a welding chamber 21 is formed at the top of the lower die 2; a plurality of shunting holes 11 penetrating up and down are provided on the upper die 1, and each shunting hole 11 communicates with the welding chamber 21; a forming chamber 22 is recessed in the welding chamber 21 of the lower die 2, and a forming hole 23 penetrating the lower die 2 up and down is provided in the forming chamber 22. The shape of the forming hole 23 corresponds to the contour shape of the solid aluminum profile 10; at least one step 3 is provided between the outer edge of the top of the forming hole 23 and the side wall of the forming chamber 22; the top surface 31 of the step is spaced from the top surface of the welding chamber 21, and the side surface 32 of the step is spaced from the forming hole 23.

[0025] Therefore, when using the die structure of this embodiment to Figure 1 extrusion-mold and produce the shown solid aluminum profile 10, first, the aluminum ingot is shunted through the shunting holes 11 of the upper die 1. After shunting, the metal converges in the welding chamber 21 and then enters the forming chamber 22, which can increase the pressure; and because of the setting of the step 3, the friction force of the metal flow is increased, that is, the pressure of the metal entering the forming hole 23 is increased, so as to increase the extrusion ratio when the product is formed in the forming hole 23, so as to shorten the length of the tailing section of the finally formed solid aluminum profile 10 and solve the surface coarse grain problem at the same time. After actual measurement, when using the die structure of this embodiment, the length of the tailing section of the 20-meter solid aluminum profile 10 after final forming is less than 0.3 meters; thus, the material utilization rate can be greatly improved, the scrapped length can be reduced, and the cost can be reduced. [H1]

[0026] Specifically, as Figure 3 and Figure 6 shown, the forming chamber 22 of this embodiment is in the shape of a long rectangular groove; the forming hole 23 includes a large rectangular hole 231 and two small rectangular holes 232. The two small rectangular holes 232 are respectively located at the front and rear sides of the large rectangular hole 231 and respectively communicate with the large rectangular hole 231; one of the steps 3 is provided on each of the left and right sides of the large rectangular hole 231. The large rectangular hole 231 is used to form the middle part 102 of the solid aluminum profile 10, and two steps 3 are provided to ensure that the middle part 102 is not prone to tailing.

[0027] In this embodiment, the two small rectangular holes 232 are respectively communicated with the right part of the large rectangular hole 231; a stopper 4 is respectively arranged on the front and rear sides of the large rectangular hole 231. The left ends of the front and rear stoppers 4 are integrally connected to the front and rear ends of the left-side step 3 respectively, and the right ends of the front and rear stoppers 4 are respectively spaced from the two small rectangular holes 232; and the lengths of the front and rear ends of the left and right steps 3 are equal to the front and rear lengths of the large rectangular hole 231.

[0028] The stopper 4 is also provided to increase the friction and pressure. There is a spacing between the stopper 4 and the small rectangular hole 232 to allow the metal to smoothly enter the large rectangular hole 231 from the front and rear sides of the large rectangular hole 231.

[0029] In this embodiment, the center of the large rectangular hole 231 is located at the center of the lower die 2. Four shunt holes 11 are circumferentially and spacedly arranged on the upper die 1; the shunt holes 11 are respectively distributed corresponding to the front, rear, left, and right of the forming hole 23. So that the shunted metal can flow into the front, rear, left, and right sides of the forming hole 23 of the lower die 2 to ensure that there is sufficient metal flow in the large rectangular hole 231 at the center.

[0030] The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, equivalent changes and modifications made without departing from the principle of the present invention should still fall within the protection scope of the present invention.

[0031] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this application is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In the description of the present application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

Claims

1. A mold structure for large-scale cross-section solid aluminum profiles, characterized in that: It comprises an upper die and a lower die, wherein the upper die is buckled on the upper part of the lower die, and a welding chamber is formed on the top of the lower die; The upper die is provided with a plurality of diverter holes extending vertically, each of which is connected to the welding chamber; A forming chamber is concavely arranged in the welding chamber of the lower die, and a forming hole is provided in the forming chamber, which passes through the lower die from top to bottom, and the shape of the forming hole corresponds to the contour shape of the solid aluminum profile; At least one step is provided between the outer side of the edge of the top of the molding hole and the side wall of the molding chamber; The top surface of the step is spaced from the top surface of the welding chamber, and the side surface of the step is spaced from the forming hole.

2. The mold structure of a large-scale cross-section solid aluminum profile according to claim 1, characterized in that: The molding chamber is in the shape of a long rectangular groove; the molding hole includes a large rectangular hole and two small rectangular holes, the two small rectangular holes are respectively located at the front and rear sides of the large rectangular hole, and are respectively connected to the large rectangular hole; a step is provided on the left and right sides of the large rectangular hole.

3. The mold structure of a large-scale cross-section solid aluminum profile according to claim 2, characterized in that: The two small rectangular holes are respectively connected to the right part of the large rectangular hole; a block is also provided on the front and rear sides of the large rectangular hole, respectively, the left ends of the front and rear blocks are respectively connected to the front and rear ends of the left step as a whole, and the right ends of the front and rear blocks are respectively spaced apart from the two small rectangular holes; and the front and rear end lengths of the steps on the left and right sides are equal to the front and rear length of the large rectangular hole.

4. The mold structure of a large-scale cross-section solid aluminum profile according to claim 2, characterized in that: The center of the large rectangular hole is located at the center of the lower mold.

5. The mold structure of a large-scale cross-section solid aluminum profile according to claim 1, characterized in that: The upper die is provided with four circumferentially spaced flow diversion holes; each flow diversion hole is distributed corresponding to the front, back, left and right of the forming hole.

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