An integral molding extrusion die

Abstract

This utility model discloses an integrated extrusion die, comprising an integrally structured die body with a welding chamber inside. A forming strip is located on the lower end face of the welding chamber. An integrated die head extends from the upper end face of the welding chamber to the forming strip. The lower end of the integrated die head is configured as part of the forming strip for forming the connection between curved and straight sections. The upper end of the integrated die head is fixedly connected to the top surface of the welding chamber. The integrated die head directly connects the top surface of the welding chamber to the forming strip, with its lower end, as part of the forming strip, specifically used for forming the connection between curved and straight sections. This design avoids the splicing structure of traditional dies in this area, eliminating stress concentration and poor welding problems caused by splicing seams, and significantly improving the strength and surface quality of the profile connection. The integrated die head reduces the number of die parts, lowers assembly complexity, improves the overall rigidity of the die, and extends its service life.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, specifically to an integral molding extrusion die. Background Technology

[0002] In the field of aluminum profile processing technology, processing such as Figure 1 The aluminum profile shown has a C-shaped bend, with a straight section connected to one end of the bend. When designing and producing the extrusion die for this type of profile, the conventional design schemes are 1. closed die, 2. flat die.

[0003] The specific design of the closed-mouth mold design scheme is as follows: Figure 2 As shown, the mold is designed as a split upper mold and lower mold. The lower mold is provided with an outer contour hole that matches the outer contour shape of the target profile. The connection between the C-shaped curved part and the straight part is formed by a fork set on the upper mold. The drawback of this mold design is that when the upper and lower molds are closed, the fork and the outer contour hole are combined to form the forming hole for processing the profile. The fork is inserted into the outer contour hole to form a closed opening. During extrusion processing, burrs will form at the closed opening due to the wobble of the fork or processing errors, resulting in uneven product wall thickness and poor surface quality.

[0004] Another design scheme using a flat mold, such as Figure 3 As shown, its design features an integrated molding hole structure, with the outer contour and inner die head connected by a cantilever. Its drawback is that the cantilever of the flat die is prone to being squeezed off during extrusion, causing mold damage and leading to increased costs.

[0005] For the reasons mentioned above, it is necessary to propose an integral extrusion die to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide an integral molding extrusion die.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: An integral forming extrusion die includes an integrally structured extrusion die body, which is cylindrical with one end serving as the feed surface and the other end as the discharge surface. The extrusion die body has a welding chamber, and the lower end face of the welding chamber has a forming strip. An integral tool head extends from the upper end face of the welding chamber to the forming strip. The lower end of the integral tool head is configured as part of the forming strip for forming the connection between the curved part and the straight part. The upper end of the integral tool head is fixedly connected to the top surface of the welding chamber.

[0008] Furthermore, the lower end face of the welding chamber is provided with two forming strips, which are arranged symmetrically.

[0009] Furthermore, a hollow blade is provided at the exit end of the forming belt, and the hollow blade extends axially to the discharge end.

[0010] Furthermore, the feed surface is provided with multiple diversion holes, each including a central hole and peripheral holes, the central hole connecting to the middle of the two forming belts.

[0011] Furthermore, the bottom welding surface of the welding chamber is a horizontal plane, and the side of the welding chamber and the welding surface are connected at right angles.

[0012] Furthermore, the depth of the welding chamber is 8-15 mm.

[0013] Furthermore, the depth of the welding chamber is equal to the average diameter of the diversion hole × (0.8~1.2).

[0014] Furthermore, the outlet side of the forming belt is provided with a stepped inverted cone.

[0015] The advantages and beneficial effects of this utility model are as follows: The integrated fork in this invention directly connects the top surface of the welding chamber to the forming strip, with its lower end serving as part of the forming strip, specifically for the connection between curved and straight sections. This design avoids the splicing structure of traditional molds in this area, eliminating stress concentration and poor welding problems caused by splicing seams, and significantly improving the strength and surface quality of the profile connection. The integrated fork reduces the number of mold parts, lowers assembly complexity, improves the overall rigidity of the mold, and extends its service life.

[0016] The two symmetrically arranged forming bands allow the metal to be evenly distributed in the welding chamber, effectively balancing the pressure distribution during the extrusion process. This is particularly suitable for producing profiles with symmetrical structures, reducing the risk of profile twisting and deformation.

[0017] This design extends the service life of the mold, reducing the cost of frequent mold replacements; it also reduces the scrap rate of profiles, saving raw materials and processing costs. The strength and surface quality at the connection between the curved and straight sections of the profile are significantly improved, meeting the needs of high-end construction, automotive, and other fields for precision profiles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional shape of the profile to be processed; Figure 2 This is a structural diagram of a closed-mouth mold; Figure 3 This is a structural schematic diagram of a flat mold; Figure 4 This is a schematic diagram of the structure of an integral molding extrusion die according to this utility model; Figure 5This is a longitudinal cross-sectional schematic diagram of an integral molding extrusion die according to the present invention; Figure 6 This is a perspective view of an integral extrusion mold according to the present invention.

[0019] In the diagram: 1. Closed-end mold; 2. Flat mold; 3. Upper mold; 4. Lower mold; 5. Outer contour hole; 6. Fork; 7. Closed end; 8. Cantilever; 9. Extrusion mold body; 10. Feed surface; 11. Discharge end; 12. Welding chamber; 13. Forming strip; 14. Integrated fork; 15. Empty cutter; 16. Diverter hole; 17. Center hole; 18. Peripheral hole; 19. Welding surface; 20. Right angle transition; 21. Stepped inverted cone; 22. Bending section; 23. Straight section. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to examples. These examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0021] An integral molding extrusion die, such as Figure 4-6 As shown, the extrusion die body 9 is an integral structure, and the extrusion die body 9 is cylindrical. One end of the cylindrical body is the feed surface 10, and the other end is the discharge end 11. Similar to the prior art, this die is cylindrical. Specifically, in this embodiment, it can be a cylindrical structure, such as... Figure 4 As shown; unlike the prior art, this embodiment eliminates the design of upper and lower molds 4, adopts an integral mold body structure, and processes the internal welding chamber 12 and other structures in the cylindrical mold body through CNC machining and electro-erosion machining.

[0022] Specifically, the extrusion die body 9 is provided with a welding chamber 12, and the lower end face of the welding chamber 12 is provided with a forming strip 13, which is different from the closed die 1. Figure 2 In the extrusion die design, the forming band 13 is formed by the combination of an outer contour hole 5 and a fork 6. The outer contour hole 5 is on the lower die 4, and the fork 6 is on the upper die 3. When the upper and lower dies 4 are closed, the fork 6 is inserted into the outer contour hole 5 to form the forming band 13. Therefore, during the extrusion forming process... Figure 1 The dotted line indicates the mating surface (closed opening 7) between the fork 6 and the outer contour hole 5. Therefore, during the extrusion process, burrs and other defects are formed at the closed opening 7, affecting the appearance and use.

[0023] As an improvement in this embodiment, an integrated fork 14 is provided extending from the upper end face of the welding chamber 12 to the forming belt 13. The lower end of the integrated fork 14 is configured as part of the forming belt 13 for forming the connection between the curved part 22 and the straight part 23. The upper end of the integrated fork 14 is fixedly connected to the top surface of the welding chamber 12. In actual use, since both the upper and lower ends of the integrated fork 14 are fixedly connected, processing defects caused by the shaking of the fork 6 during extrusion processing are avoided.

[0024] In this embodiment, the lower end face of the welding chamber 12 is provided with two forming strips 13, which are symmetrically arranged. Furthermore, the two forming strips 13 are arranged in a straight line. Furthermore, a hollow blade 15 is provided at the exit end of the forming belt 13, which extends axially to the discharge end 11. This is used to prevent secondary friction or extrusion between the forming belt 13 and the profile surface at the exit, reduce the contact area between the mold and the profile, reduce frictional resistance, facilitate the smooth removal of the profile from the mold, and avoid surface defects caused by adhesion.

[0025] The exit side of the forming belt 13 is provided with a stepped inverted cone 21. The stepped inverted cone 21 is a slightly enlarged step provided in the exit direction of the forming belt 13, thereby reducing the friction between the forming belt 13 exit and the profile and preventing surface scratches.

[0026] Furthermore, the feed surface is provided with multiple diversion holes 16, each including a central hole 17 and peripheral holes 18. The central hole 17 connects to the middle of the two forming strips 13. During the processing of this extrusion die, the diversion holes 16 are formed on the feed surface 10 side by CNC machining. Electro-etching electrodes are inserted from each diversion hole 16 and gradually machined towards the discharge end 11 to form the diversion holes 16 and the welding chamber 12, thereby forming an integrated tool head 14. On the discharge end 11 side, a blanking tool 15 is machined by CNC, and then the forming strip 13 is machined by electro-etching electrodes and connected to the welding chamber 12, thereby forming the internal structure of the welding chamber 12.

[0027] The bottom welding surface 19 of the welding chamber formed by electro-erosion processing is a horizontal plane, and the side of the welding chamber and the welding surface 19 are at right angles 20.

[0028] As one embodiment, the depth of the welding chamber is 8-15mm, and in this embodiment, the preferred depth of the welding chamber is 13mm. Alternatively, the depth of the welding chamber is calculated as: average diameter of the diversion hole 16 × (0.8~1.2). During design, the depth of the welding chamber can be appropriately designed according to customer requirements.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An integrally formed extrusion die, characterized in that, The extrusion die body (9) is a columnar structure with one end being the feed surface (10) and the other end being the discharge end (11). The extrusion die body (9) is provided with a welding chamber (12). The lower end of the welding chamber (12) is provided with a forming strip (13). An integrated tool head (14) is provided extending from the upper end of the welding chamber (12) to the forming strip (13). The lower end of the integrated tool head (14) is configured as part of the forming strip (13) for forming the connection between the curved part (22) and the straight part (23). The upper end of the integrated tool head (14) is fixedly connected to the top surface of the welding chamber (12).

2. The integral molding extrusion die according to claim 1, characterized in that, The lower end face of the welding chamber (12) is provided with two forming strips (13), which are arranged symmetrically.

3. The one-piece molding extrusion die according to claim 1, characterized in that, A cutter (15) is provided at the outlet end of the forming belt (13), and the cutter (15) extends axially to the discharge end (11).

4. The integral molding extrusion die according to claim 2, characterized in that, The feed surface is provided with multiple diversion holes (16), the diversion holes (16) include a central hole (17) and peripheral holes (18), the central hole (17) is connected to the middle of the two forming belts (13).

5. The integral molding extrusion die according to claim 1, characterized in that, The welding surface (19) at the bottom of the welding chamber is a horizontal plane, and the side of the welding chamber and the welding surface (19) are connected at right angles (20).

6. The integral molding extrusion die according to claim 1, characterized in that, The depth of the welding chamber is 8-15 mm.

7. The integral molding extrusion die according to claim 1, characterized in that, The exit side of the forming belt (13) is provided with a stepped inverted cone (21).

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