A preheating device for aluminum profile extrusion die and use method thereof

Abstract

The present invention discloses a preheating device for an aluminum profile extrusion die and a method for using the device, including a mounting plate for connecting the extrusion die to an external extrusion barrel, a rotating frame rotatably connected to the side wall of the mounting plate to realize the rotation operation of the mounting seat, and the mounting seat is detachably mounted on the rotating frame for fixing and preheating the loaded extrusion die. The present invention symmetrically rotates and arranges two preheating mounting seats equipped with extrusion dies on the side wall of the mounting plate on the end face of the extrusion barrel, so that the extrusion die can be quickly operated when it needs to be replaced, thereby improving the production efficiency of the aluminum profile, and a lifting mechanism is arranged on the mounting plate to lift the mounting seat when the extrusion die needs to be replaced, thereby reducing the labor intensity of the staff and improving the replacement efficiency. At the same time, the positioning assembly can be used to position and fix the replaced extrusion die to ensure its stability during the extrusion process.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum profile application, and in particular to a preheating device for an aluminum profile extrusion die and a use method thereof. Background Art

[0002] The preheating device of aluminum extrusion die plays a vital role in aluminum profile production. It ensures that the die reaches the appropriate working temperature during the extrusion process, thereby improving production efficiency and product quality.

[0003] When the existing aluminum profile is extruded, the extrusion die needs to be preheated, and the traditional preheating process requires multiple extrusion dies to be placed in a preheating furnace for preheating. Therefore, when the die in use is replaced, manual handling operations are required, which increases the labor intensity of the staff and reduces the production efficiency of the entire processing process. Therefore, the present invention proposes a preheating device for an aluminum profile extrusion die and a method for using the same. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a preheating device for an aluminum profile extrusion die and a method for using the same. Two preheating mounting seats with extrusion dies are symmetrically rotated on the side walls of a mounting plate on the end face of an extrusion cylinder, so that the extrusion die can be quickly operated when it needs to be replaced, thereby improving the production efficiency of the aluminum profile. A lifting mechanism is provided on the mounting plate to lift the mounting seat when the extrusion die needs to be replaced, thereby reducing the labor intensity of the staff and improving the replacement efficiency. At the same time, the positioning component can be used to position and fix the replaced extrusion die to ensure its stability during the extrusion process.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a preheating device for an aluminum profile extrusion die, comprising a mounting plate for connecting the extrusion die to an external extrusion cylinder, the rotating frame being rotatably connected to the side wall of the mounting plate to realize the rotation operation of the mounting seat, the mounting seat being detachably mounted on the rotating frame to fix and preheat the loaded extrusion die, the two positioning assemblies being bolted to the top and bottom of the mounting plate to position and fix the mounting seat, the lifting mechanism being bolted to the top of the mounting plate to lift the mounting seat that needs to be removed.

[0006] The present invention is further configured as follows: the front portion of the mounting plate is symmetrically bolted with mounting strips near the side wall, and the two mounting strips are both U-shaped.

[0007] The above technical solution makes it easy to use the mounting strip to install and fix the entire mounting plate.

[0008] The present invention is further configured as follows: the mounting base is configured as two parts, including a mounting frame A and a mounting frame B, opposite walls of the mounting frame A and the mounting frame B are provided with L-shaped grooves, and the two L-shaped grooves are respectively movably connected to two positioning components, the side walls of the mounting frame A and the mounting frame B are respectively sleeved on the connecting shafts arranged at the top and bottom of the rotating frame, and are respectively locked by locking bolts threadedly connected to the end faces of the connecting shafts, heating components are installed inside the arc grooves on the opposite surfaces of the mounting frame A and the mounting frame B, the opposite surfaces of the mounting frame A and the mounting frame B are snap-connected with a mold base, and the mold body is installed inside the mold base.

[0009] Through the above technical solution, the internal mold base can be installed and fixed using mounting frame A and mounting frame B, thereby fixing the internal mold body. At the same time, the internal heating component can be used to preheat the internal mold body, and the rotating frame on the side can be rotatably installed or disassembled.

[0010] The present invention is further configured as follows: a lifting ring is threadedly connected at the center of the top of the mounting frame A, and the mounting frame A is inserted into the interior of a positioning hole B opened at the top of the mounting frame B through a positioning shaft A set near one side of its bottom, and the mounting frame B is inserted into the interior of a positioning hole A opened at the bottom of the mounting frame A through a positioning shaft B set near one side of its bottom.

[0011] Through the above technical solution, the lifting ring is used to facilitate lifting when disassembling, and the internal positioning shaft A and positioning shaft A can be used to position and fix the mounting frame A and the mounting frame B during installation, thereby improving the stability during connection.

[0012] The present invention is further configured as follows: the heating component comprises a graphite card frame arranged in a semicircular arc, and the inner arc wall of the graphite card frame is fitted to the outer wall of the mold base, and the outer arc wall of the graphite card frame is fitted with a plurality of heating rings.

[0013] Through the above technical solution, the high temperature of the heating ring is utilized to evenly transfer the high temperature through the graphite card holder, so that it is ensured that the mold body can be heated evenly and slowly and kept within a certain temperature range.

[0014] The present invention is further configured as follows: the side walls of the mold base are symmetrically fixedly connected with positioning blocks, and the positioning blocks are engaged and connected to the inside of positioning grooves provided on the opposite surfaces of the mounting frame A and the mounting frame B.

[0015] Through the above technical solution, when the mold body is installed, it can be positioned and engaged in the positioning groove through the positioning block on the side wall of the mold base, so as to ensure that the position of the mold body is adjusted and fixed during installation.

[0016] The present invention is further configured as follows: the positioning assembly includes a positioning plate, a sliding shaft is fixedly connected to the top of the positioning plate near one side, a spring A is wrapped around the outer wall of the sliding shaft, a sliding seat is slidably connected to the outer wall of the sliding shaft, and the end face of the sliding seat is pressed against the spring A, an adjusting nut is threadedly connected to the outer wall of the sliding shaft near the end face, and the adjusting nut is pressed against the end face of the sliding seat.

[0017] Through the above technical solution, it is convenient to use the adjusting nut to move the thread on the sliding shaft, thereby pushing the sliding seat to slide, so that the limiting shaft at the bottom can be engaged into the inside of the L-shaped groove, so that the position of the mounting seat can be positioned and fixed, and the compressed spring A can be used to quickly reset the limiting shaft during disassembly.

[0018] The present invention is further configured as follows: the slide seat is slidably connected to the inside of the slide groove opened at the top of the slide shaft through the slide bar arranged on its inner wall, the bottom of the slide seat is fixedly connected to the limiting axis, and the limiting axis passes through the movable groove opened at the top of the positioning plate, and the end face extends to the inside of the L-shaped groove.

[0019] Through the above technical solution, it is convenient for the limiting shaft to limit and fix the installed mounting seat, so that it can remain stable during the extrusion process, thereby improving the extrusion quality of the aluminum profile.

[0020] The present invention is further configured as follows: the lifting mechanism includes a fixed plate installed on the top of the mounting plate, the top of the fixed plate is symmetrically bolted with a hydraulic cylinder near the middle position, the end face of the driving rod of the hydraulic cylinder is bolted with a lifting plate, the lifting plate is symmetrically slidably connected with a guide rod near the end face position, the top center of the lifting plate is fixedly connected with a limiting block, a stabilizing rod is arranged through the center of the lifting plate, the outer wall of the stabilizing rod is wrapped with a spring B, the bottom of the stabilizing rod is fixedly connected with the limiting plate, the top of the stabilizing rod is fixedly connected with a bent rod, the end face of the bent rod is bolted with a hook, and the bent rod is engaged with the inside of the limiting groove opened at the top of the limiting block through the reinforcing ribs arranged at the bottom.

[0021] Through the above technical solution, the bent rod is lifted so that it can press the spring B against the bottom of the lifting plate through the limiting plate at the bottom and compress it. Then, the bent rod is rotated so that the reinforcing rib at the bottom is installed correspondingly inside one of the limiting grooves. Then, the hook is hung in the lifting ring set on the top of the mounting frame A, the locking bolt on the mounting frame A is removed, and the hydraulic cylinder is started. Its driving rod drives the lifting plate to slide stably on the guide rod, so that the mounting frame A gradually separates from the mounting frame B.

[0022] On the other hand, a method for using a preheating device for an aluminum profile extrusion die is provided, comprising the following steps: S1. First, lift the crankshaft so that it can press the spring B against the bottom of the lifting plate through the limit plate at the bottom and compress it. Then, rotate the crankshaft so that the reinforcement rib at the bottom is installed in one of the limit grooves. S2. Then, hang the hook in the lifting ring provided on the top of the mounting frame A, remove the locking bolt on the mounting frame A, and start the hydraulic cylinder. The driving rod drives the lifting plate to slide steadily on the guide rod, so that the mounting frame A gradually separates from the mounting frame B. S3, then the internal mold base carrying the mold body is driven, and a new mold body is replaced; S4, then the mold base is positioned and installed in the positioning groove opened on the top of the mounting frame B through the positioning blocks provided on the side wall thereof; S5, then start the hydraulic cylinder again to make the lifting plate descend and reset, so that the suspended mounting frame A descends, and the positioning shaft A on the mounting frame A and the positioning shaft B on the mounting frame B are respectively inserted into the positioning hole B and the positioning hole A, so as to realize the installation and fixation of the mold base, and remove the hook; S6, then start the internal heating ring, the high temperature generated by it is evenly transferred to the mold base through the graphite card holder, and the mold base evenly transfers the high temperature to the mold body to achieve the preheating function; S7, then loosen the adjusting nut on the positioning assembly, and use the compression reset elasticity of spring A to make the slide seat drive the limit shaft away from the bottom L-shaped groove, so that the mounting seat in use and the mold body can be rotated 90 degrees on the rotating frame; S8, then rotate the pre-assembled mounting seat so that its side wall fits the mounting plate and the L-shaped groove corresponds to the limit axis; S9. Finally, the adjusting nut is rotated to make the slide slide on the slide shaft, so that it drives the limiting shaft at the bottom to move to the corner of the L-shaped groove, thereby fixing the entire mounting seat. The other disassembled mounting seat can then replace the mold body that needs to be used later and preheat it.

[0023] The beneficial effects of the present invention are as follows: 1. The present invention proposes a preheating device for aluminum profile extrusion die and a method for using the same. Two preheating mounting seats with extrusion dies are symmetrically rotated on the side wall of the mounting plate at the end face of the extrusion cylinder, so that the extrusion die can be quickly replaced when it is needed, thereby improving the production efficiency of aluminum profiles. 2. The present invention proposes a preheating device for an aluminum profile extrusion die and a method for using the same. A lifting mechanism is arranged on the mounting plate, so that the mounting base can be lifted when the extrusion die needs to be replaced, thereby reducing the labor intensity of the staff and improving the replacement efficiency. At the same time, the positioning component can be used to position and fix the replaced extrusion die to ensure its stability during the extrusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a first structural diagram of the present invention; Figure 2 is a second structural diagram of the present invention; Figure 3 An exploded view of the present invention; Figure 4 It is a structural diagram of the mounting plate in the present invention; Figure 5 It is a first exploded view of the mounting base in the present invention; Figure 6 The second explosion of the mounting base in the present invention; Figure 7 For the explosion of the positioning assembly in the present invention; Figure 8 It is a first exploded view of the lifting mechanism in the present invention; Fig. 9 This is a second exploded view of the lifting mechanism in the present invention.

[0025] In the figure: 1, mounting plate; 11, mounting bar; 2, rotating frame; 21, connecting shaft; 3, mounting seat; 31, mounting frame A; 311, lifting ring; 312, positioning hole A; 313, positioning shaft A; 32, mounting frame B; 321, positioning shaft B; 322, positioning hole B; 33, L-shaped groove; 34, locking bolt; 35, heating assembly; 351, graphite card holder; 352, heating ring; 36, mold base; 37, mold body ; 38. Positioning groove; 4. Positioning assembly; 41. Positioning plate; 411. Movable groove; 42. Sliding shaft; 421. Sliding groove; 43. Spring A; 44. Sliding seat; 441. Limiting shaft; 45. Adjusting nut; 5. Lifting mechanism; 51. Fixed plate; 52. Hydraulic cylinder; 53. Lifting plate; 54. Limiting block; 55. Stabilizing rod; 56. Spring B; 57. Limiting plate; 58. Bending rod; 581. Reinforcing rib; 59. Hook. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] like Figure 1-Figure 4 As shown, a preheating device for an aluminum profile extrusion die includes a mounting plate 1 for connecting the extrusion die to an external extrusion cylinder. The front portion of the mounting plate 1 is symmetrically bolted with mounting strips 11 near the side wall, and the two mounting strips 11 are both U-shaped, so that the entire mounting plate 1 can be installed and fixed using the mounting strips 11. The rotating frame 2 is rotatably connected to the side wall of the mounting plate 1 to realize the rotation operation of the mounting seat 3.

[0028] like Figure 5 and Figure 6 As shown, the mounting seat 3 is detachably mounted on the rotating frame 2, and is used for fixing and preheating the installed extrusion die. The mounting seat 3 is arranged in two parts, including a mounting frame A31 and a mounting frame B32. A lifting ring 311 is threadedly connected at the top center of the mounting frame A31. The mounting frame A31 is inserted into the positioning hole B322 opened at the top of the mounting frame B32 through a positioning shaft A313 arranged near one side of its bottom. The mounting frame B32 is inserted into the positioning hole A312 opened at the bottom of the mounting frame A31 through a positioning shaft B321 opened near one side of its bottom. The lifting ring 311 is used to facilitate lifting when disassembling it, and at the same time, The internal positioning shaft A313 and the positioning shaft A313 can position and fix the mounting frame A31 and the mounting frame B32 during installation, thereby improving the stability during connection. The opposite walls of the mounting frame A31 and the mounting frame B32 are provided with L-shaped grooves 33, and the two L-shaped grooves 33 are movably connected to the two positioning components 4 respectively. The side walls of the mounting frame A31 and the mounting frame B32 are respectively sleeved on the connecting shafts 21 set at the top and bottom of the rotating frame 2, and are respectively locked by locking bolts 34 threadedly connected to the end faces of the connecting shafts 21. The heating components 35 are installed inside the arc grooves on the opposite surfaces of the mounting frame A31 and the mounting frame B32. The heating assembly 35 includes a graphite holder 351 arranged in a semicircular shape, and the inner arc wall of the graphite holder 351 is fitted to the outer wall of the mold base 36. The outer arc wall of the graphite holder 351 is fitted with a plurality of heating coils 352. The high temperature of the heating coils 352 can be evenly transferred through the graphite holder 351, so that the mold body 37 can be evenly and slowly heated and kept within a certain temperature range. The mold base 36 is connected to the opposite surfaces of the mounting frame A31 and the mounting frame B32 by snapping. The side wall of the mold base 36 is symmetrically fixedly connected with a positioning block 361, and is connected to the mounting frame A31 and the mounting frame B32 by snapping the positioning block 361. The inside of the positioning groove 38 opened on the opposite side of the frame B32 is convenient for installing the mold body 37. It can be positioned and engaged in the positioning groove 38 through the positioning block 361 on the side wall of the mold base 36, so as to ensure that the position of the mold body 37 is adjusted and fixed during installation. The mold base 36 is installed with the mold body 37 inside. The mounting frame A31 and the mounting frame B32 can be used to install and fix the internal mold base 36, so as to fix the internal mold body 37. At the same time, the internal heating component 35 can be used to preheat the internal mold body 37, and the rotating frame 2 on the side can be installed or disassembled in a rotating manner. like Figure 1 and Figure 7As shown, two positioning components 4 are bolted to the top and bottom of the mounting plate 1, and are used to position and fix the mounting seat 3. The positioning component 4 includes a positioning plate 41. A sliding shaft 42 is fixedly connected to the top of the positioning plate 41 near one side. A spring A43 is wrapped around the outer wall of the sliding shaft 42. A sliding seat 44 is slidably connected to the outer wall of the sliding shaft 42, and the end face of the sliding seat 44 is tightly pressed against the spring A43. The sliding seat 44 is slidably connected to the inside of the sliding groove 421 opened at the top of the sliding shaft 42 through the sliding strip set on its inner wall. The bottom of the sliding seat 44 is fixedly connected to a limiting shaft 441, and the limiting shaft 441 passes through the movable groove 411 opened at the top of the positioning plate 41, and the end face extends to L The inside of the L-shaped groove 33 is convenient for the limiting shaft 441 to limit and fix the installed mounting seat 3, so that it can remain stable during the extrusion process, thereby improving the extrusion quality of the aluminum profile. The outer wall of the sliding shaft 42 is threadedly connected with an adjusting nut 45 near the end surface, and the adjusting nut 45 is pressed on the end surface of the sliding seat 44, so that the adjusting nut 45 can be used to thread and move on the sliding shaft 42, thereby pushing the sliding seat 44 to slide, so that the limiting shaft 441 at the bottom can be engaged with the inside of the L-shaped groove 33, so that the mounting seat 3 can be positioned and fixed, and the compressed spring A43 is used to quickly reset the limiting shaft 441 during disassembly; like Figure 8 and Fig. 9 As shown, the lifting mechanism 5 is bolted to the top of the mounting plate 1, and is used to lift the mounting seat 3 that needs to be disassembled. The lifting mechanism 5 includes a fixed plate 51 installed on the top of the mounting plate 1, and a hydraulic cylinder 52 is symmetrically bolted near the middle of the top of the fixed plate 51, and a lifting plate 53 is bolted to the end face of the driving rod of the hydraulic cylinder 52, and the lifting plate 53 is symmetrically slidably connected with a guide rod 531 near the end face. A limiting block 54 is fixedly connected to the center of the top of the lifting plate 53, and a stabilizing rod 55 is provided through the center of the lifting plate 53. The outer wall of the stabilizing rod 55 is wrapped with a spring B56, and the bottom of the stabilizing rod 55 is fixedly connected to the limiting plate 57, and the top of the stabilizing rod 55 is fixedly connected to a bent rod 58. The end face bolt is connected with a hook 59, and the bent rod 58 is engaged with the inside of the limit groove 541 opened at the top of the limit block 54 through the reinforcing rib 581 arranged at its bottom. The bent rod 58 is lifted so that it can press the spring B56 against the bottom of the lifting plate 53 through the limit plate 57 at the bottom and compress it. Then, the bent rod 58 is rotated so that the reinforcing rib 581 at the bottom is installed in the inside of one of the limit grooves 541. Then, the hook 59 is hung in the lifting ring 311 arranged at the top of the mounting frame A31, the locking bolt 34 on the mounting frame A31 is removed, and the hydraulic cylinder 52 is started. Its driving rod drives the lifting plate 53 to slide stably on the guide rod 531, so that the mounting frame A31 gradually separates from the mounting frame B32.

[0029] like Figure 1-Figure 9As shown, a method for using a preheating device for an aluminum profile extrusion die comprises the following steps: S1. First, lift the bent rod 58 so that it can press the spring B56 against the bottom of the lifting plate 53 through the limiting plate 57 at the bottom and compress it. Then, rotate the bent rod 58 so that the reinforcing rib 581 at the bottom is installed in one of the limiting grooves 541. S2, then hang the hook 59 in the lifting ring 311 provided on the top of the mounting frame A31, remove the locking bolt 34 on the mounting frame A31, and start the hydraulic cylinder 52, so that its driving rod drives the lifting plate 53 to slide stably on the guide rod 531, so that the mounting frame A31 gradually separates from the mounting frame B32; S3, then the internal mold base 36 carrying the mold body 37 is driven, and a new mold body 37 is replaced; S4, then the mold base 36 is positioned and installed in the positioning groove 38 opened on the top of the mounting frame B32 through the positioning block 361 provided on the side wall thereof; S5, then start the hydraulic cylinder 52 again, so that the lifting plate 53 is lowered and reset, so that the suspended mounting frame A31 is lowered, and the positioning shaft A313 on the mounting frame A31 and the positioning shaft B321 on the mounting frame B32 are respectively inserted into the positioning hole B322 and the positioning hole A312, so as to realize the installation and fixation of the mold base 36, and remove the hook 59; S6, then start the internal heating ring 352, the high temperature generated by it is evenly transferred to the mold base 36 through the graphite card frame 351, and the mold base 36 evenly transfers the high temperature to the mold body 37 to achieve the preheating function; S7, then loosen the adjusting nut 45 on the positioning assembly 4, and use the compression return elasticity of the spring A43 to make the slide seat 44 drive the limiting shaft 441 away from the bottom L-shaped groove 33, so that the mounting seat 3 in use carrying the mold body 37 can be rotated 90 degrees on the rotating frame 2; S8, then rotate the pre-assembled mounting seat 3 so that its side wall fits the mounting plate 1, and the L-shaped groove 33 corresponds to the limiting axis 441; S9. Finally, the adjusting nut 45 is rotated to make the slide seat 44 slide on the slide shaft 42, so that it drives the limiting shaft 441 at the bottom to move to the corner of the L-shaped groove 33, thereby fixing the entire mounting seat 3. The other disassembled mounting seat 3 can then replace the mold body 37 that needs to be used later and preheat it.

[0030] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A preheating device for an aluminum profile extrusion die, characterized in that: include A mounting plate (1) for connecting the extrusion die to an external extrusion cylinder; A rotating frame (2), the rotating frame (2) being rotatably connected to a side wall of the mounting plate (1) to realize a rotation operation on the mounting seat (3); A mounting seat (3), the mounting seat (3) being detachably mounted on the rotating frame (2) and used for fixing and preheating the extrusion die installed therein; Positioning components (4), two of the positioning components (4) are bolted to the top and bottom of the mounting plate (1) and are used to position and fix the mounting seat (3); A lifting mechanism (5), wherein the lifting mechanism (5) is bolted to the top of the mounting plate (1) and is used to lift the mounting seat (3) that needs to be disassembled.

2. The preheating device for an aluminum profile extrusion die according to claim 1, characterized in that: The front part of the mounting plate (1) is symmetrically bolted with mounting strips (11) near the side wall, and both mounting strips (11) are arranged in a U shape.

3. The preheating device for an aluminum profile extrusion die according to claim 1, characterized in that: The mounting base (3) is provided with two parts, including a mounting frame A (31) and a mounting frame B (32). L-shaped grooves (33) are provided on opposite walls of the mounting frame A (31) and the mounting frame B (32), and the two L-shaped grooves (33) are respectively movably connected to the two positioning components (4). The side walls of the mounting frame A (31) and the mounting frame B (32) are respectively sleeved on the connecting shafts (21) provided at the top and bottom of the rotating frame (2), and are respectively locked by locking bolts (34) threadedly connected to the end faces of the connecting shafts (21). A heating component (35) is installed inside the arc grooves on the opposite surfaces of the mounting frame A (31) and the mounting frame B (32). A mold base (36) is engaged and connected to the opposite surfaces of the mounting frame A (31) and the mounting frame B (32), and a mold body (37) is installed inside the mold base (36).

4. The preheating device for an aluminum profile extrusion die according to claim 3 is characterized in that: A lifting ring (311) is threadedly connected at the center of the top of the mounting frame A (31), and the mounting frame A (31) is inserted into the interior of a positioning hole B (322) opened at the top of the mounting frame B (32) through a positioning shaft A (313) provided near one side of the bottom of the mounting frame A (31), and the mounting frame B (32) is inserted into the interior of a positioning hole A (312) opened at the bottom of the mounting frame A (31) through a positioning shaft B (321) provided near one side of the bottom of the mounting frame B (32).

5. The preheating device for an aluminum profile extrusion die according to claim 3, characterized in that: The heating component (35) comprises a graphite holder (351) arranged in a semicircular arc, wherein the inner arc wall of the graphite holder (351) is fitted to the outer wall of the mold base (36), and a plurality of heating rings (352) are fitted to the outer arc wall of the graphite holder (351).

6. The preheating device for an aluminum profile extrusion die according to claim 3, characterized in that: The side walls of the mold base (36) are symmetrically fixedly connected with positioning blocks (361), and are snap-fitted into the interior of positioning grooves (38) provided on opposite surfaces of the mounting frame A (31) and the mounting frame B (32) through the positioning blocks (361).

7. The preheating device for an aluminum profile extrusion die according to claim 3, characterized in that: The positioning assembly (4) comprises a positioning plate (41), a top of the positioning plate (41) being fixedly connected to a sliding shaft (42) near one side, an outer wall of the sliding shaft (42) being wrapped with a spring A (43), a sliding seat (44) being slidably connected to the outer wall of the sliding shaft (42), and an end face of the sliding seat (44) being pressed against the spring A (43), and an adjusting nut (45) being threadedly connected to the outer wall of the sliding shaft (42) near the end face, and the adjusting nut (45) being pressed against the end face of the sliding seat (44).

8. The preheating device for an aluminum profile extrusion die according to claim 7, characterized in that: The slide seat (44) is slidably connected to the inside of a slide groove (421) opened at the top of the slide shaft (42) via a slide bar provided on its inner wall. The bottom of the slide seat (44) is fixedly connected to a limit shaft (441), and the limit shaft (441) passes through a movable groove (411) opened at the top of the positioning plate (41), and the end surface extends to the inside of the L-shaped groove (33).

9. The preheating device for an aluminum profile extrusion die according to claim 1, characterized in that: The lifting mechanism (5) comprises a fixed plate (51) mounted on the top of the mounting plate (1); a hydraulic cylinder (52) is symmetrically bolted to the top of the fixed plate (51) near the middle; a lifting plate (53) is bolted to the end face of the driving rod of the hydraulic cylinder (52); a guide rod (531) is symmetrically slidably connected to the lifting plate (53) near the end face; a limiting block (54) is fixedly connected to the top center of the lifting plate (53); a stabilizing rod (55) is provided through the center of the lifting plate (53); a spring B (56) is wrapped around the outer wall of the stabilizing rod (55); a limiting plate (57) is fixedly connected to the bottom of the stabilizing rod (55); a bent rod (58) is fixedly connected to the top of the stabilizing rod (55); and a hook (59) is bolted to the end face of the bent rod (58); The curved rod (58) is engaged and connected to the inside of the limiting groove (541) opened at the top of the limiting block (54) through a reinforcing rib (581) provided at the bottom thereof.

10. A method for using a preheating device for an aluminum profile extrusion die according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, lift the bent rod (58) so that it can press the spring B (56) against the bottom of the lifting plate (53) through the limiting plate (57) at the bottom and compress it. Then, rotate the bent rod (58) so that the reinforcing rib (581) at the bottom is installed in one of the limiting grooves (541). S2, then hang the hook (59) in the lifting ring (311) provided on the top of the mounting frame A (31), remove the locking bolt (34) on the mounting frame A (31), and start the hydraulic cylinder (52), so that the driving rod drives the lifting plate (53) to slide stably on the guide rod (531), so that the mounting frame A (31) gradually separates from the mounting frame B (32); S3, then driving the internal mold base (36) carrying the mold body (37), and replacing the new mold body (37); S4, then positioning the mold base (36) in the positioning groove (38) provided at the top of the mounting frame B (32) through the positioning block (361) provided on the side wall thereof; S5, then the hydraulic cylinder (52) is started again, so that the lifting plate (53) is lowered and reset, thereby lowering the suspended mounting frame A (31), and the positioning shaft A (313) on the mounting frame A (31) and the positioning shaft B (321) on the mounting frame B (32) are respectively inserted into the positioning hole B (322) and the positioning hole A (312), so as to realize the installation and fixation of the mold base (36), and remove the hook (59); S6, then start the internal heating ring (352), and the high temperature generated by it is evenly transferred to the mold base (36) through the graphite card frame (351), and the mold base (36) evenly transfers the high temperature to the mold body (37), thereby realizing the preheating function; S7, then loosen the adjusting nut (45) on the positioning assembly (4), and utilize the compression return elasticity of the spring A (43) to make the slide seat (44) drive the limiting shaft (441) away from the bottom L-shaped groove (33), so that the mounting seat (3) in use carrying the mold body (37) can be rotated 90 degrees on the rotating frame (2); S8, then rotating the pre-assembled mounting seat (3) so that its side wall fits against the mounting plate (1), and the L-shaped groove (33) corresponds to the limiting axis (441); S9. Finally, the adjusting nut (45) is rotated to make the slide seat (44) slide on the slide shaft (42), so that it drives the limiting shaft (441) at the bottom to move to the corner of the L-shaped groove (33), thereby fixing the entire mounting seat (3). The other disassembled mounting seat (3) can then be replaced with the mold body (37) to be used later and preheated.

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