Plate extrusion die

Abstract

The invention discloses a plate extrusion die. The plate extrusion die comprises a die body, a feeding hole, a discharging hole and an extrusion hole. The die body is provided with a feeding side and a discharging side. The feeding hole is formed in the feeding side of the mold body; the discharging hole is formed in the discharging side of the mold body; the extrusion hole is formed in the die body, one end of the extrusion hole is communicated with the feeding hole, the other end of the extrusion hole is communicated with the discharging hole, the size of the cross section of the extrusion hole is smaller than that of the cross section of the feeding hole, and the hole axis of the feeding hole, the hole axis of the extrusion hole and the hole axis of the discharging hole are collinear. Wherein the cross section of the feeding hole and the cross section of the extrusion hole are both in a strip shape, and the length direction of the cross section of the extrusion hole is inclined relative to the length direction of the cross section of the feeding hole.

Description

Technical Field

[0001] The invention relates to the field of aluminum plate processing, and in particular to a plate extrusion die. Background Art

[0002] Aluminum sheets can be processed by hot extrusion. There are some existing dies for aluminum sheet extrusion, whose die bodies have a feed hole, an extrusion hole and a discharge hole that are connected in sequence. The cross-sections of the feed hole, the extrusion hole and the discharge hole are all bar-shaped, and the cross-sectional size of the extrusion hole is smaller than that of the feed hole, so as to extrude the aluminum raw material into an aluminum sheet of a predetermined size. When the aluminum sheet is extruded, the die and the aluminum raw material are first heated to a predetermined temperature, and then the raw material is inserted into the feed hole under pressure. The aluminum raw material is extruded into an aluminum sheet of a predetermined size through the extrusion hole, and then discharged through the discharge hole. The current sheet extrusion die is prone to material lines after the surface of the extruded aluminum sheet is oxidized, which sometimes cannot meet the use requirements. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a plate extrusion die to reduce the risk of material lines appearing on the surface of the extruded plate after oxidation.

[0004] According to an embodiment of the present invention, a sheet extrusion die comprises a die body, a feed hole, a discharge hole and an extrusion hole. The die body has a feed side and a discharge side; the feed hole is arranged on the feed side of the die body; the discharge hole is arranged on the discharge side of the die body; the extrusion hole is arranged in the die body, one end of the extrusion hole is connected to the feed hole, and the other end is connected to the discharge hole, the cross-sectional dimension of the extrusion hole is smaller than the cross-sectional dimension of the feed hole, and the hole axes of the feed hole, the extrusion hole and the discharge hole are collinear; wherein the cross-sections of the feed hole and the extrusion hole are both strip-shaped, and the length direction of the cross-sectional dimension of the extrusion hole is inclined relative to the length direction of the cross-sectional dimension of the feed hole.

[0005] The plate extrusion die according to the embodiment of the present invention has at least the following beneficial effects: thick plate-shaped raw materials are used for hot extrusion. Since the cross-sectional length direction of the extrusion hole is inclined relative to the cross-sectional length direction of the feed hole, the same thickness layer of the plate along the thickness direction is formed by the metal extrusion flow of different thickness layers of the raw material. The same thickness layer of the plate has different resistance to extrusion deformation, so that the grain structure of the same thickness layer of the plate has no obvious directionality, thereby reducing the risk of material lines appearing on the surface of the extruded plate after oxidation.

[0006] According to some embodiments of the present invention, an angle A between a length direction of a cross section of the extrusion hole and a length direction of a cross section of the feed hole satisfies 10°≤A≤45°.

[0007] According to some embodiments of the present invention, an angle A between a length direction of a cross section of the extrusion hole and a length direction of a cross section of the feed hole satisfies A=20°.

[0008] According to some embodiments of the present invention, the cross-sectional length direction of the feed hole is arranged along the horizontal direction.

[0009] According to some embodiments of the present invention, the extrusion hole includes a forming hole segment, one end of the forming hole segment is connected to the bottom wall of the feed hole, and the thickness of the forming hole segment gradually decreases in a direction away from the feed hole.

[0010] According to some embodiments of the present invention, the extrusion hole also includes a shaping hole segment, the other end of the shaping hole segment is butt-jointed with one end of the shaping hole segment, the other end of the shaping hole segment is connected to the bottom wall of the discharge hole, and the thickness of the shaping hole segment is uniformly arranged in a direction away from the feed hole.

[0011] According to some embodiments of the present invention, the forming hole segment has two forming side walls along the thickness direction, and both of the two forming side walls are inclined relative to the hole axis of the extrusion hole.

[0012] According to some embodiments of the present invention, a cross-sectional dimension of the discharge hole is greater than a cross-sectional dimension of the extrusion hole.

[0013] According to some embodiments of the present invention, the discharge hole includes a first hole segment, a second hole segment, and a third hole segment which are sequentially connected and arranged in a direction away from the extrusion hole, the thickness of the first hole segment is smaller than the thickness of the second hole segment, and the thickness of the second hole segment is smaller than the thickness of the third hole segment.

[0014] According to some embodiments of the present invention, the third hole segment has two discharge side walls along the thickness direction, both of the two discharge side walls are inclined relative to the hole axis of the discharge hole, and the distance between the two discharge side walls gradually increases in the direction away from the extrusion hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a schematic front view of a plate extrusion die according to an embodiment of the present invention;

[0018] Figure 2 For the embodiment of the present invention Figure 1 A cross-sectional schematic diagram of the DD direction;

[0019] Figure 3 For the embodiment of the present invention Figure 2 A local enlarged schematic diagram of point E.

[0020] Reference numerals:

[0021] Mold body 100, feed side 110, discharge side 120;

[0022] Feed hole 200;

[0023] The discharge hole 300, the first hole section 310, the second hole section 320, the third hole section 330, and the discharge side wall 331;

[0024] Extrusion hole 400, forming hole section 410, forming side wall 411, shaping hole section 420;

[0025] The cross-sectional length direction of the feed hole is B, and the cross-sectional length direction of the extrusion hole is C. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 understood as a limitation on the present invention.

[0028] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] Reference Figures 1 to 3, is a plate extrusion die of an embodiment of the present invention, comprising a die body 100, a feed hole 200, a discharge hole 300 and an extrusion hole 400. The die body 100 has a feed side 110 and a discharge side 120; the feed hole 200 is arranged on the feed side 110 of the die body 100; the discharge hole 300 is arranged on the discharge side 120 of the die body 100; the extrusion hole 400 is arranged in the die body 100, one end of the extrusion hole 400 is connected to the feed hole 200, and the other end is connected to the discharge hole 300, the cross-sectional dimension of the extrusion hole 400 is smaller than the cross-sectional dimension of the feed hole 200, and the hole axes of the feed hole 200, the extrusion hole 400 and the discharge hole 300 are collinear; wherein, the cross-sections of the feed hole 200 and the extrusion hole 400 are both strip-shaped, and the length direction of the cross-sectional dimension of the extrusion hole 400 is inclined relative to the length direction of the cross-sectional dimension of the feed hole 200.

[0031] When hot extrusion is performed on thick plate-shaped raw materials, since the cross-sectional length direction of the extrusion hole 400 is inclined relative to the cross-sectional length direction of the feed hole 200, the same thickness layer of the plate along the thickness direction is formed by the metal extrusion flow of different thickness layers of the raw material. The same thickness layer of the plate has different resistance to extrusion deformation, so that the grain structure of the same thickness layer of the plate has no obvious directionality, thereby reducing the risk of material lines appearing on the surface of the extruded plate after oxidation. Generally, the larger the distance F between the edge of the extrusion hole 400 and the side wall of the feed hole 200, the greater the deformation that the raw material needs to undergo before entering the extrusion hole 400 for molding, making the grain structure of the product at this location finer; the smaller the distance G between the edge of the extrusion hole 400 and the side wall of the feed hole 200, the smaller the deformation that the raw material can undergo before entering the extrusion hole 400 for molding, and the larger the grain structure of the product at this time. Since the length direction of the cross section of the extrusion hole 400 is inclined relative to the length direction of the cross section of the feed hole 200, at this time, the distance between the extrusion hole 400 and the hole wall on the same side of the feed hole 200 at various locations along the length direction has a gradual relationship. At this time, the coarseness of the grain structure of the plate along the length direction of the cross section can present a certain gradual law, which meets specific usage needs and improves the comprehensive performance of the plate.

[0032] Specifically, the cross section of the discharge hole 300 is also strip-shaped, and the length direction of the cross section of the discharge hole 300 is the same as the length direction of the cross section of the extrusion hole 400 .

[0033] In the embodiment, the angle between the cross-sectional length direction of the extrusion hole 400 and the cross-sectional length direction of the feed hole 200 is A, which satisfies 10°≤A≤45°. When the angle A is too small, the effect of reducing the grain after oxidation of the plate by the above method is not obvious; when the angle A is too large, it is not enough to extrude a plate of sufficient size. Therefore, within the above-mentioned angle range between the extrusion hole 400 and the feed hole 200, the size of the processed aluminum plate meets the use requirements, and the degree of grain after oxidation of the extruded plate surface can be relatively well reduced.

[0034] In the embodiment, the angle between the cross-sectional length direction of the extrusion hole 400 and the cross-sectional length direction of the feed hole 200 is A, satisfying A=20°. When the angle between the two is 20°, the processed aluminum sheet can significantly reduce the degree of material lines after surface oxidation, and the use effect is better. It is conceivable that in other embodiments, the angle A can also be other values, such as 15°, 25°, 30°, 35° or 40°, or other values ​​within the range, and those skilled in the art can make specific configurations according to actual needs.

[0035] In the embodiment, the cross-sectional length direction of the feed hole 200 is arranged along the horizontal direction, which is convenient for adapting to conventional extrusion equipment and is relatively easy to process.

[0036] In the embodiment, the extrusion hole 400 includes a forming hole segment 410, one end of which is connected to the bottom wall of the feed hole 200, and the thickness of the forming hole segment 410 gradually decreases in the direction away from the feed hole 200. The thickness of the forming hole segment 410 gradually decreases, and when the metal enters the forming hole segment 410 from the feed hole 200, it can be subjected to three-dimensional compressive stress, so that the deformation of the aluminum plate in the thickness direction is different, the deformation of the surface in the thickness direction is relatively increased, and the deformation of the internal area is relatively reduced, so that the surface in the thickness direction produces a recrystallized fine-grained structure, and the internal area produces a completely recrystallized structure, that is, the aluminum plate is a recrystallized structure as a whole, which can effectively avoid the problems of poor oxidation such as material lines and spots after oxidation.

[0037] In the embodiment, the extrusion hole 400 further includes a shaping hole segment 420, the other end of the shaping hole segment 410 is butted with one end of the shaping hole segment 420, the other end of the shaping hole segment 420 is connected to the bottom wall of the discharge hole 300, and the thickness of the shaping hole segment 420 is uniformly arranged in a direction away from the feed hole 200. After the metal is basically extruded into a plate of a predetermined size through the shaping hole segment 410, the plate can be sized in the shaping hole segment 420, and then the plate is sent out through the discharge hole 300.

[0038] In an embodiment, the forming hole segment 410 has two forming side walls 411 along the thickness direction, and both forming side walls 411 are inclined relative to the hole axis of the extrusion hole 400, so that the thickness of the forming hole segment 410 is reduced in the direction away from the feed hole 200, which facilitates the consistent pressure effect on both sides of the plate along the thickness direction, so as to extrude a more stable aluminum plate. Specifically, the two forming side walls 411 are inclined at the same angle relative to the hole axis of the extrusion hole 400, and the extrusion effect is relatively good. In some embodiments, the angle between the two forming side walls 411 can be 5° to 30°.

[0039] In the embodiment, the cross-sectional dimension of the discharge hole 300 is larger than the cross-sectional dimension of the extrusion hole 400, so that when the shaped aluminum sheet is sent out through the discharge hole 300, the discharge hole 300 is not prone to the risk of mold clogging, so that the extrusion process proceeds smoothly.

[0040] In the embodiment, the discharge hole 300 includes a first hole segment 310, a second hole segment 320 and a third hole segment 330 which are sequentially connected and arranged in a direction away from the extrusion hole 400, the thickness of the first hole segment 310 is less than the thickness of the second hole segment 320, and the thickness of the second hole segment 320 is less than the thickness of the third hole segment 330. The discharge hole 300 of the above structure is conducive to the processing of the first hole segment 310 and the second hole segment 320 with a deeper depth, thereby improving the processability of the mold and reducing the difficulty of machining.

[0041] In the embodiment, the third hole section 330 has two discharge side walls 331 along the thickness direction, the two discharge side walls 331 are inclined relative to the hole axis of the discharge hole 300, and the distance between the two discharge side walls 331 gradually increases in the direction away from the extrusion hole 400. The machining difficulty can be further reduced, making the machining of the discharge hole 300 easier.

[0042] Specifically, along the hole axis direction of the discharge hole 300 , the size of the first hole segment 310 is smaller than the size of the second hole segment 320 , and the size of the second hole segment 320 is smaller than the size of the third hole segment 330 , which facilitates reducing the difficulty of machining.

[0043] Specifically, the bottom periphery of the feed hole 200 is provided with rounded corners to facilitate the extrusion of the aluminum raw material into an aluminum profile.

[0044] Furthermore, the dimension of the extrusion hole 400 along the left-right direction is H, and the dimension of the feed hole 200 along the left-right direction is J. In order to meet the requirements of extrusion metal flow and extrusion deformation, it is necessary to satisfy 0.7≤H / J≤0.9. At this time, the raw material can flow into the extrusion hole 400 relatively easily for extrusion molding.

[0045] Furthermore, the size of the extrusion hole 400 along the up and down direction is K, and the size of the feed hole 200 along the up and down direction is L. In order to meet the extrusion metal flow and extrusion deformation requirements, it is necessary to satisfy 0.6≤K / L≤0.8. At this time, the raw material can flow into the extrusion hole 400 relatively easily for extrusion molding.

[0046] Specifically, the distance between the lower end of the extrusion hole 400 and the lower side wall of the feed hole 200 is generally the same as the distance between the upper end of the extrusion hole 400 and the upper side wall of the feed hole 200. The distance between the left end of the extrusion hole 400 and the left side wall of the feed hole 200 is generally the same as the distance between the right end of the extrusion hole 400 and the right side wall of the feed hole 200.

[0047] Specifically, the sheet extrusion die of the present invention is suitable for extrusion processing of metal sheets, especially extrusion processing of aluminum sheets. It is understandable that other types of metal sheets can also be extruded using the sheet extrusion die.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sheet extrusion die, characterized in that: include: A mold body (100) having a feed side (110) and a discharge side (120); A feed hole (200) is provided on the feed side (110) of the mold body (100); A discharge hole (300) is provided on the discharge side (120) of the mold body (100); An extrusion hole (400) is disposed in the mold body (100), one end of the extrusion hole (400) is connected to the feed hole (200), and the other end is connected to the discharge hole (300), the cross-sectional dimension of the extrusion hole (400) is smaller than the cross-sectional dimension of the feed hole (200), and the hole axes of the feed hole (200), the extrusion hole (400) and the discharge hole (300) are collinear; The cross-sections of the feed hole (200) and the extrusion hole (400) are both strip-shaped, and the length direction of the cross-section of the extrusion hole (400) is inclined relative to the length direction of the cross-section of the feed hole (200).

2. The sheet extrusion die according to claim 1, characterized in that: The included angle between the length direction of the cross section of the extrusion hole (400) and the length direction of the cross section of the feed hole (200) is A, satisfying 10°≤A≤45°.

3. The sheet extrusion die according to claim 1 or 2, characterized in that: The included angle between the length direction of the cross section of the extrusion hole (400) and the length direction of the cross section of the feed hole (200) is A, and A=20° is satisfied.

4. The sheet extrusion die according to claim 1, characterized in that: The cross-sectional length direction of the feed hole (200) is arranged along the horizontal direction.

5. The sheet extrusion die according to claim 1, characterized in that: The extrusion hole (400) comprises a forming hole section (410), one end of which is connected to the bottom wall of the feed hole (200), and the thickness of the forming hole section (410) gradually decreases in a direction away from the feed hole (200).

6. The sheet extrusion die according to claim 5, characterized in that: The extrusion hole (400) further comprises a shaping hole section (420), the other end of the shaping hole section (410) is butted against one end of the shaping hole section (420), the other end of the shaping hole section (420) is connected to the bottom wall of the discharge hole (300), and the thickness of the shaping hole section (420) is uniformly arranged in a direction away from the feed hole (200).

7. The sheet extrusion die according to claim 5, characterized in that: The molding hole section (410) has two molding side walls (411) along the thickness direction, and the two molding side walls (411) are both inclined relative to the hole axis of the extrusion hole (400).

8. The sheet extrusion die according to claim 1, characterized in that: The cross-sectional dimension of the discharge hole (300) is greater than the cross-sectional dimension of the extrusion hole (400).

9. The sheet extrusion die according to claim 8, characterized in that: The discharge hole (300) comprises a first hole segment (310), a second hole segment (320) and a third hole segment (330) which are arranged in sequence and connected in a direction away from the extrusion hole (400); the thickness of the first hole segment (310) is smaller than the thickness of the second hole segment (320), and the thickness of the second hole segment (320) is smaller than the thickness of the third hole segment (330).

10. The sheet extrusion die according to claim 9, characterized in that: The third hole section (330) has two discharge side walls (331) along the thickness direction, and the two discharge side walls (331) are inclined relative to the hole axis of the discharge hole (300), and the distance between the two discharge side walls (331) gradually increases in the direction away from the extrusion hole (400).

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