Multi-cavity output aluminum pipe extrusion die

Abstract

The utility model discloses a multi-cavity output aluminum pipe extrusion die. The multi-cavity output aluminum pipe extrusion die comprises an upper die, a lower die and n unloading rings, the upper die is provided with a center flow dividing cavity and an edge flow dividing cavity, n forming male die blocks are arranged on one side of the upper die, and the forming male die blocks are distributed between a center area and an edge area. The lower die is provided with n positioning grooves, the unloading ring is arranged in the positioning grooves, the groove bottoms of the positioning grooves are provided with forming female die holes, one side of the unloading ring is provided with a welding guide groove, the groove bottom of the welding guide groove is provided with a channel hole, one end of the channel hole is connected with the forming female die holes, and the projections of the center flow dividing cavity and the edge flow dividing cavity on the lower die are located outside the forming female die holes. And the projections of the central shunting cavity and the edge shunting cavity on the lower die are intersected with at least one welding guide groove. According to the utility model, a plurality of aluminum pipes can be extruded and produced at one time, the production efficiency can be effectively improved, the consistency of the flowing speed of molten metal is high, the stability and the reliability of extrusion forming are high, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to profile extrusion technical field, especially a kind of aluminium pipe extrusion die of multiple cavity output. BACKGROUND

[0002] Aluminium pipe extrusion die is the key equipment in aluminium pipe production, it is obtained by the aluminium pipe of required shape and size after extrusion forming by the molten metal injection mould cavity, extrusion.

[0003] In the field of aluminium pipe extrusion forming, the traditional extrusion die usually adopts single station design, only one aluminium pipe can be extruded at a time.This design, although simple in structure, has obvious limitations, with the continuous improvement of industrial production team efficiency and product quality requirements, the traditional single station output die has been difficult to meet the production demand of large scale and high efficiency, and the existing extrusion die has the problem of uneven distribution of metal melt, which affects product quality. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least one of the technical problems existing in the prior art is solved.For this purpose, the utility model provides a kind of aluminium pipe extrusion die of multiple cavity output, and production efficiency is high, and extrusion effect is uniform and reliable, and the product quality of extrusion is good.

[0005] According to the aluminium pipe extrusion die of multiple cavity output of the utility model embodiment, the lower die is connected to one side of the upper die, and n is an integer greater than 1;

[0006] The upper die is provided with a center region and a peripheral region, the peripheral region surrounds the periphery of the center region, the center region is provided with a center shunt cavity, and the peripheral region is provided with a plurality of evenly distributed peripheral shunt cavities;The side of the upper die close to the lower die is provided with n forming convex modules, and all the forming convex modules are evenly distributed between the center region and the peripheral region;

[0007] The lower die is provided with n positioning grooves matched with each forming convex module, each unloading ring is arranged in the corresponding positioning groove, the groove bottom of each positioning groove is provided with a forming concave die hole, the side of each unloading ring close to the upper die is provided with a welding guide groove, the groove bottom of each welding guide groove is provided with a passage hole, the passage hole is connected with the forming concave die hole away from the welding guide groove, the forming convex module is sequentially arranged in the welding guide groove, the passage hole and the forming concave die hole, the projection of the center shunt cavity and the peripheral shunt cavity on the lower die is located outside the forming concave die hole, and the projection of the center shunt cavity and the peripheral shunt cavity on the lower die intersects with at least one welding guide groove.

[0008] In the embodiment, n=2, two forming convex modules are located on opposite sides of the center region, and the center shunt cavity connects two welding guide grooves.

[0009] In the embodiment, three center distribution cavities are arranged symmetrically along the symmetry axes of the two forming male mold modules.

[0010] In the embodiment, the forming groove is arranged on the side of each forming male mold module close to the center distribution cavity.

[0011] In the embodiment, the lower mold is provided with a cooling channel between the two forming female mold holes.

[0012] In the embodiment, the circumferential surface of the lower mold is provided with a plurality of heat dissipation grooves.

[0013] In the embodiment, the side wall of the welding guide groove is inclined, and the opening area of the welding guide groove is larger than the bottom area.

[0014] In the embodiment, the force relieving ring is a ceramic ring.

[0015] In the embodiment, the first positioning structure is arranged on the side of the upper mold close to the lower mold, the second positioning structure is arranged on the side of the lower mold close to the upper mold, and the first positioning structure is connected to the second positioning structure in clamping mode.

[0016] In the embodiment, the first positioning structure comprises a positioning protrusion and a positioning blind hole arranged on the positioning protrusion, the second positioning structure comprises a positioning recess and a positioning column arranged on the positioning recess, the positioning protrusion is arranged in the positioning recess, and the positioning column is inserted into the positioning blind hole.

[0017] The embodiment of the utility model has at least the following beneficial effects:

[0018] By arranging at least two forming female mold holes, a plurality of aluminum pipes can be extruded at one time, the production efficiency can be effectively improved, the demand of large-scale production is met, the positions of the projections of the center distribution cavity and the edge distribution cavity on the lower mold and the forming female mold holes are staggered, the situation that the metal melt directly enters the forming female mold hole from the distribution cavity is avoided, the metal melt moves in the horizontal direction under the guidance of the welding guide groove and then integrates into the forming female mold hole, the consistency of the flow speed of the metal melt is high, the uniformity of the distribution of the metal melt during extrusion molding is improved, the wall thickness of the aluminum pipe product prepared by extrusion molding is more uniform, and the product quality is significantly improved; in addition, the projections of the center distribution cavity and the edge distribution cavity on the lower mold intersect with at least one welding guide groove, so that the metal melt can smoothly pass through the welding guide groove and the passage hole to reach the corresponding forming female mold hole, and the stability and reliability of the extrusion molding are high; by arranging the force relieving ring in the positioning groove, the mechanical impact and thermal impact of the metal melt can be weakened in advance, the lower mold is effectively protected, and the service life of the mold is prolonged; when the force relieving ring reaches the service life, the force relieving ring can be directly replaced, and the maintenance cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:

[0020] Figure 1 It is a three-dimensional structure schematic view of the aluminum pipe extrusion die of the multiple cavity output of the embodiment of the present utility model;

[0021] Figure 2 It is a three-dimensional structure schematic view of the aluminum pipe extrusion die of the multiple cavity output of the embodiment of the present utility model from another perspective;

[0022] Figure 3 It is an exploded structure schematic view of the aluminum pipe extrusion die of the multiple cavity output of the embodiment of the present utility model;

[0023] Figure 4 It is an exploded structure schematic view of the aluminum pipe extrusion die of the multiple cavity output of the embodiment of the present utility model from another perspective;

[0024] Figure 5 It is a side view structure schematic view of the aluminum pipe extrusion die of the multiple cavity output of the embodiment of the present utility model;

[0025] Figure 6 It is a sectional structure schematic view along Figure 5 A-A';

[0026] Figure 7 It is a sectional structure schematic view along Figure 5 B-B'。

[0027] Reference signs:

[0028] Upper die 100, center distribution cavity 110, edge distribution cavity 120, forming punch block 130, reinforced forming groove 131, positioning protrusion 140, positioning blind hole 141;

[0029] Lower die 200, positioning groove 210, forming concave die hole 220, cooling channel 230, heat dissipation groove 240, positioning groove 250, positioning column 251;

[0030] Force relief ring 300, welding guide groove 310, passage hole 320. DETAILED DESCRIPTION

[0031] The embodiments of the present utility model will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, if the wire sleeve or bracket is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Aluminum tube extrusion dies are key equipment in aluminum tube production. They inject molten metal into the die cavity, and after extrusion, aluminum tubes of the desired shape and size are obtained. In the field of aluminum tube extrusion forming, traditional extrusion dies typically employ a single-station design, extruding only one aluminum tube at a time. While this design is simple in structure, it has significant limitations. With the continuous improvement of industrial production efficiency and product quality requirements, traditional single-station output dies can no longer meet the needs of large-scale, high-efficiency production. Furthermore, existing extrusion dies suffer from uneven distribution of molten metal, affecting product quality.

[0036] In particular, to improve production efficiency, multi-station design and development often involves distributing molten metal into multiple forming cavities simultaneously. If the flow distribution cavity design is inadequate, inconsistent flow rates of the molten metal at each station can lead to uneven wall thickness in the extruded aluminum tubes, affecting product quality. Furthermore, the mechanical and thermal impacts of the molten metal on the die during extrusion are significant, easily causing die wear and thermal fatigue, shortening die lifespan, and increasing maintenance costs. To address these issues, a dual-station output aluminum tube extrusion die is urgently needed that can effectively control the flow rate of the molten metal, improve extrusion uniformity, and extend die lifespan.

[0037] The following is for reference only. Figure 1 To be continued Figure 7 This invention describes a multi-cavity output aluminum tube extrusion die, which has high production efficiency, uniform and reliable extrusion effect, and good product quality.

[0038] Reference Figures 1 to 7An embodiment of the present invention provides a multi-cavity output aluminum tube extrusion die, comprising an upper die 100, a lower die 200, and n unloading rings 300. The lower die 200 is connected to one side of the upper die 100, and the unloading rings 300 are located between the upper die 100 and the lower die 200. n is an integer greater than 1.

[0039] The upper mold 100 has a central region and an edge region. The edge region surrounds the central region. The central region has a central flow-dividing cavity 110, and the edge region has several evenly distributed edge flow-dividing cavities 120. The upper mold 100 has n forming protrusions 130 on the side near the lower mold 200. All the forming protrusions 130 are evenly distributed between the central region and the edge region, so that the central flow-dividing cavity 110 and the edge flow-dividing cavity 120 can squeeze and inject molten metal around the forming protrusions 130.

[0040] The lower mold 200 is provided with n positioning grooves 210 that respectively match each forming protrusion module 130. Each unloading ring 300 is respectively provided in the corresponding positioning groove 210. The bottom of each positioning groove 210 is provided with a forming die hole 220 that penetrates the lower mold 200 away from the upper mold 100. Each unloading ring 300 is provided with a welding guide groove 310 on the side near the upper mold 100. The bottom of each welding guide groove 310 is provided with a channel hole 320 that matches the corresponding forming die hole 220. One end of the welding guide groove 310 is connected to the forming die hole 220. The forming convex module 130 passes through the welding guide groove 310, the channel hole 320, and the forming die hole 220 in sequence. By replacing the lower die 200 with a stress relief ring 300, the mechanical and thermal impact of the molten metal is weakened in advance, which can effectively extend the service life of the lower die 200. When the stress relief ring 300 reaches the end of its service life, it can be directly replaced, which can effectively reduce maintenance costs. Along the input direction of the molten metal in the flow distribution cavity, the central flow distribution cavity... The projections of the central flow divider 110 and the edge flow divider 120 onto the lower mold 200 are both located outside the area of ​​the forming die hole 220. That is, the projections of the central flow divider 110 and the edge flow divider 120 onto the lower mold 200 are offset from the position of the forming die hole 220. This prevents the molten metal from directly entering the forming die hole 220 from the flow divider. It ensures that the molten metal moves laterally under the guidance of the welding guide groove 310 before entering the forming die hole 220, effectively controlling the entry of different parts of the molten metal. The speed at which the molten metal enters the forming die hole 220 is increased, thereby effectively improving the consistency of the flow speed of the molten metal entering the forming die hole 220. This can effectively improve the uniformity of the molten metal distribution during extrusion molding, thereby effectively improving the extrusion molding effect. The projections of the central flow chamber 110 and the edge flow chamber 120 on the lower die 200 intersect with at least one welding guide groove 310, which can ensure that the molten metal in the flow chamber can smoothly pass through the welding guide groove 310 and the channel hole 320 to reach the corresponding forming die hole 220.

[0041] By setting at least two forming die holes 220, multiple aluminum tubes can be extruded at once, effectively improving production efficiency and meeting the needs of large-scale production. By staggering the projections of the central flow chamber 110 and the edge flow chamber 120 on the lower die 200 with the positions of the forming die holes 220, the molten metal is prevented from directly entering the forming die holes 220 from the flow chambers. Under the guidance of the welding guide groove 310, the molten metal moves laterally and then integrates into the forming die holes 220. This effectively controls the speed at which different parts of the molten metal enter the forming die holes 220, improving the consistency of the molten metal flow rate and thus improving the uniformity of the molten metal distribution during extrusion molding. The aluminum tubes produced by extrusion molding have a higher wall thickness. The thickness is more uniform, and the product quality is significantly improved. In addition, the projections of the central flow channel 110 and the edge flow channel 120 on the lower die 200 intersect with at least one welding guide groove 310, ensuring that the molten metal can smoothly pass through the welding guide groove 310 and the channel hole 320 to reach the corresponding forming die hole 220, further improving the stability and reliability of extrusion molding. By setting a stress relief ring 300 in the positioning groove 210, the stress relief ring 300 can pre-weaken the mechanical and thermal shock of the molten metal, effectively protecting the lower die 200 and extending the service life of the die. When the stress relief ring 300 reaches the end of its service life, it can be directly replaced without replacing the entire lower die 200, greatly reducing maintenance costs.

[0042] It is understandable that n=2, that is, there are two unloading rings 300 and two positioning grooves 210. The two forming protrusions 130 are located on opposite sides of the central area. The central diversion cavity 110 connects the two welding guide grooves 310 on the side away from the channel hole 320. By conveying molten metal to the two welding guide grooves 310 through the central diversion cavity 110, the space utilization of the upper mold 100 can be fully improved.

[0043] Preferably, the cross-sectional area of ​​a single central flow divider 110 is larger than the cross-sectional area of ​​a single edge flow divider 120. By setting the large-area central flow divider 110 in the central region of the upper mold 100, the uniformity and reliability of the molten metal injected into the welding guide groove 310 can be improved while ensuring the structural stability of the upper mold 100, and sufficient molten metal can be injected into the welding guide groove 310.

[0044] It is understood that there are three central distribution cavities 110, which are evenly arranged along the axis of symmetry of the two forming protrusion modules 130. Each central distribution cavity 110 is connected to the side of the two welding guide grooves 310 away from the channel hole 320. By setting a sufficient number of central distribution cavities 110, the molten metal is fully distributed to the two welding guide grooves 310, which effectively improves the reliability of the extrusion molding effect.

[0045] Preferably, the edge diversion cavities 120 located on the extension line of the symmetry axis of the two forming protrusion modules 130 are respectively connected to two welding guide grooves 310. This part of the edge diversion cavity 120 can evenly distribute the molten metal into the two welding guide grooves 310.

[0046] Understandably, each forming protrusion 130 has a reinforcing forming groove 131 on the side near the central distribution cavity 110, and the opening of the reinforcing forming groove 131 is connected to the forming die hole 220. During the extrusion molding process, molten metal fills the space between the forming die hole 220 and the forming protrusion 130, and also fills the reinforcing forming groove 131, forming a frame-shaped aluminum tube structure, and forming protruding reinforcing ribs inside the frame shape, which can effectively improve the structural reliability of the extruded aluminum tube.

[0047] It is understood that the lower mold 200 is provided with a cooling channel 230 that runs through the opposite sides of the circumferential surface. The cooling channel 230 is located between two forming die holes 220. The two ends of the cooling channel 230 are respectively connected to an external coolant supply device and a coolant recovery device. Preferably, the coolant can be cold water, which is low in cost and good for the environment.

[0048] During normal processing, heat tends to accumulate between the two forming die holes 220, resulting in poor solidification and forming effect in the area of ​​the forming die hole 220 near the center of the lower die 200. Cooling the area between the two forming die holes 220 through the cooling channel 230 can effectively ensure the cooling effect of this part of the molten metal, thereby improving the forming effect of the aluminum tube.

[0049] It is understandable that the circumferential surface of the lower mold 200 is provided with several heat dissipation grooves 240. Along the input direction of the molten metal in the flow chamber, the projection of the heat dissipation grooves 240 is separated from the projection of the cooling channel 230, which can avoid the heat dissipation effect of the two heat dissipation structures from being repeated and can effectively improve the uniformity of the cooling and forming effect.

[0050] Specifically, there are two sets of heat dissipation grooves 240, which are symmetrically distributed on opposite sides of the cooling channel 230.

[0051] It is understandable that the sidewall of the welded guide groove 310 is inclined, and the groove opening area of ​​the welded guide groove 310 is larger than the groove bottom area, so as to form a narrowing guiding effect. That is, the welded guide groove 310 is in the shape of a boss. The top of the boss of the welded guide groove 310 is connected to the channel hole 320, and the bottom of the welded guide groove 310 is the groove opening, which is connected to the corresponding edge diversion cavity 120 and the center diversion cavity 110. The inclined surface of the welded guide groove 310 can form a good guiding effect, effectively buffering the extrusion impact force, thereby effectively improving the stability of the overall extrusion die structure.

[0052] Understandably, the unloading ring 300 is a heat-resistant ceramic ring. Ceramic has good heat resistance and lubrication properties, which can effectively resist the thermal and mechanical shocks from the molten metal during the extrusion process. By having the ceramic ring replace the lower die 200 to pre-bear the impact from the molten metal, the service life of the lower die 200 can be effectively extended.

[0053] Understandably, the upper mold 100 has a first positioning structure on the side closest to the lower mold 200, and the lower mold 200 has a second positioning structure that matches the first positioning structure on the side closest to the upper mold 100. The first positioning structure and the second positioning structure are interlocked. This effectively improves the positioning connection between the upper mold 100 and the lower mold 200.

[0054] It is understood that the first positioning structure includes a positioning protrusion 140 and a positioning blind hole 141 provided on the positioning protrusion 140, and the second positioning structure includes a positioning groove 250 and a positioning post 251 provided on the bottom of the positioning groove 250. The positioning groove 250 matches the positioning protrusion 140, and the positioning post 251 matches the positioning blind hole 141. The positioning protrusion 140 is located in the positioning groove 250, and the positioning post 251 is inserted into the positioning blind hole 141. Preferably, multiple positioning posts 251 and multiple positioning blind holes 141 are provided, which can effectively improve the reliability of the positioning effect.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-cavity output aluminum tube extrusion die, characterized in that, It includes an upper mold (100), a lower mold (200) and n unloading rings (300), wherein the lower mold (200) is connected to one side of the upper mold (100), and n is an integer greater than 1; The upper mold (100) has a central region and an edge region. The edge region surrounds the central region. The central region has a central flow-dividing cavity (110). The edge region has a plurality of evenly distributed edge flow-dividing cavities (120). The upper mold (100) has n forming protrusions (130) on the side near the lower mold (200). All the forming protrusions (130) are evenly distributed between the central region and the edge region. The lower mold (200) is provided with n positioning grooves (210) that respectively match each of the forming protrusions (130). Each unloading ring (300) is respectively provided in the corresponding positioning groove (210). The bottom of each positioning groove (210) is provided with a forming die hole (220). Each unloading ring (300) is provided with a welding guide groove (310) on the side near the upper mold (100). The bottom of each welding guide groove (310) is provided with a channel hole (320). The channel hole (320) is away from the welding guide groove. One end of (310) is connected to the forming die hole (220). The forming convex module (130) is sequentially inserted through the welding guide groove (310), the channel hole (320) and the forming die hole (220). The projections of the central flow divider cavity (110) and the edge flow divider cavity (120) on the lower mold (200) are both located outside the forming die hole (220). The projections of the central flow divider cavity (110) and the edge flow divider cavity (120) on the lower mold (200) intersect with at least one of the welding guide grooves (310).

2. The multi-cavity output aluminum tube extrusion die according to claim 1, characterized in that, n=2, the two forming convex modules (130) are located on opposite sides of the central region, and the central diversion cavity (110) is connected to the two welding guide grooves (310).

3. The multi-cavity output aluminum tube extrusion die according to claim 2, characterized in that, The central diversion cavity (110) is provided in three parts, and the three central diversion cavities (110) are evenly arranged along the axis of symmetry of the two forming convex modules (130).

4. The multi-cavity output aluminum tube extrusion die according to claim 3, characterized in that, Each of the molding protrusion modules (130) is provided with a reinforcing molding groove (131) on the side near the central diversion cavity (110).

5. A multi-cavity output aluminum tube extrusion die according to any one of claims 2 to 4, characterized in that, The lower mold (200) is provided with a cooling channel (230), which is located between the two forming die holes (220).

6. The multi-cavity output aluminum tube extrusion die according to claim 5, characterized in that, The lower mold (200) has several heat dissipation grooves (240) on its circumferential surface.

7. The multi-cavity output aluminum tube extrusion die according to claim 1, characterized in that, The sidewall of the welding guide groove (310) is inclined, and the groove opening area of ​​the welding guide groove (310) is larger than the groove bottom area.

8. The multi-cavity output aluminum tube extrusion die according to claim 7, characterized in that, The unloading ring (300) is a ceramic ring.

9. The multi-cavity output aluminum tube extrusion die according to claim 1, characterized in that, The upper mold (100) is provided with a first positioning structure on the side near the lower mold (200), and the lower mold (200) is provided with a second positioning structure that matches the first positioning structure on the side near the upper mold (100). The first positioning structure and the second positioning structure are connected in a locking manner.

10. The multi-cavity output aluminum tube extrusion die according to claim 9, characterized in that, The first positioning structure includes a positioning protrusion (140) and a positioning blind hole (141) disposed on the positioning protrusion (140). The second positioning structure includes a positioning groove (250) and a positioning post (251) disposed on the positioning groove (250). The positioning protrusion (140) is located in the positioning groove (250), and the positioning post (251) is inserted into the positioning blind hole (141).

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