Forming die for light-weight extruded profile of automobile and using method of forming die

Abstract

The invention discloses a forming mold of an automobile light-weight extruded profile and a using method thereof, and relates to the technical field of hot pressing molds, the automobile light-weight extruded profile mold comprises a base, a buffer box base is fixedly arranged on the top surface of the base, and an electric heating plate is arranged on the buffer box base through a supporting block; an electric heating plate is arranged above the upper die, a lower die is arranged above the electric heating plate, a positioning seat is arranged above the electric heating plate, a hollow rubber column is arranged on the top surface of the positioning seat, a rubber cone is arranged on the top surface of the hollow rubber column, and a groove hole is formed in the rubber cone; the upper die mechanism is detachably installed above the lower die mechanism, the upper die mechanism comprises an upper die, an upper cavity is formed in the bottom face of the upper die, and the upper cavity is matched with the lower die. According to the forming die for the light-weight extruded profile of the automobile, the profile can be conveniently cooled during demolding, and the internal and external pressure difference of the profile which is not thoroughly cooled before demolding of the die is conveniently balanced, so that the quality of the produced profile is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hot pressing dies, in particular to a forming die for a lightweight extruded profile of an automobile and a use method thereof. Background Art

[0002] With the continuous development of automobile lightweight technology, lightweight materials such as aluminum alloys are widely used in automobile manufacturing. Extrusion molding, as an efficient and low-cost processing method, plays an important role in the manufacture of aluminum alloy structural parts. By designing a reasonable mold structure and selecting suitable materials, aluminum alloy profiles with high precision, high strength and good surface quality can be produced, thus meeting the requirements of automobile lightweighting on material performance and shape and size.

[0003] The applicant searched the existing extrusion molding dies and found that the existing technologies mostly use mechanical demolding or manual demolding to demold the formed aluminum alloy parts. During the mechanical demolding process, a robot arm needs to reach into the mold to take out the aluminum alloy parts, which makes it inconvenient to demold the formed aluminum alloy parts. At the same time, since it takes a long time to take out the aluminum alloy parts, continuous production of aluminum alloy parts cannot be achieved, which leads to low production efficiency of aluminum alloy parts.

[0004] A Chinese patent with publication number CN116851617B discloses a demoulding device for an aluminum alloy hot extrusion die, comprising a workbench, an upper die and a lower die, the lower surface of the upper die and the upper surface of the lower die being in active contact, a demoulding bin being fixedly mounted on the upper surface of the workbench, and a fixed seat being fixedly mounted on the inner wall of the demoulding bin; by raising a lifting plate, the lifting plate raises the upper die through a guide block and a connecting rod, and when the lifting plate stops working, a cam raises the fixed plate through a push seat, and the fixed plate raises the connecting plate and a soft airbag through a fixing rod, the soft airbag is separated from the shrink sleeve and expands, and the rising and expanding of the soft airbag causes the aluminum alloy part in the lower die to pop up, thereby realizing the automatic pop-up of the formed aluminum alloy part. Compared with the existing technology of taking out the formed aluminum alloy part by a mechanical arm, the convenience of demoulding the aluminum alloy part is effectively improved, and at the same time, the production efficiency of the aluminum alloy part is effectively improved.

[0005] However, during use, the demoulding device cannot balance the pressure difference between the mold and the outside world before the mold cools down. Under a strong pressure difference, the profile is easily squeezed and deformed, thereby reducing the quality of the produced profile.

[0006] Therefore, in view of the above problems, it is necessary for the applicant to design a molding die for lightweight automotive extrusion profiles to solve the problems. Summary of the invention

[0007] The object of the present invention is to provide a forming die for a lightweight extruded profile of an automobile and a method of using the same, so as to solve the problems raised by the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forming die for a lightweight extruded profile of an automobile and a method for using the same, comprising a base, and a cache box base is arranged at the upper end of the base, a support block is arranged at the upper end of the cache box base, and an electric heating plate is arranged on the top of the support block, and also comprising a lower die, the lower die is arranged above the electric heating plate and near the center, an upper die is disassembled and installed directly above the lower die, and an upper cavity is arranged on the bottom surface of the upper die, a guide groove is arranged on the bottom surface of the upper die, a water-passing cavity is arranged inside the upper die, and the water-passing cavity is connected to the guide groove, and a rubber cone is arranged below the guide groove, A groove is provided in the rubber cone, and a connecting component is provided at the lower end of the rubber cone. The connecting component is used to cooperate with the rubber cone to connect the lower mold and the upper mold. A sliding groove is provided on the outer wall of the connecting component, and a locking component is provided inside the sliding groove. The locking component locks the upper mold and the lower mold when the rubber cone shrinks. A cooling component is fixedly connected to the outer side of the buffer box base. The cooling component cooperates with the rubber cone to inject water into the upper mold after the upper mold and the lower mold are locked. An unlocking component is provided inside the rubber cone. The unlocking component cooperates with the locking component to unlock the upper mold and the lower mold when the rubber cone is expanded for the first time after being injected with water, and seals the top of the rubber cone to facilitate the secondary expansion of the rubber cone.

[0009] Preferably, the connecting component comprises a hollow rubber column fixedly connected to the rubber cone, the bottom surface of the hollow rubber column is fixedly connected to a positioning seat, and the bottom surface of the positioning seat is fixedly connected to the top surface of the electric heating plate.

[0010] Preferably, the locking component includes a limit groove opened inside the guide groove and a slider engaged with the limit groove, the slider is slidably arranged inside the slide groove, a return spring is fixedly arranged on one side of the slider, and the end of the return spring away from the slider is fixedly connected to the inner surface of one side of the slide groove.

[0011] Preferably, the unlocking component includes a steel wire rope fixedly connected to the slider, a lifting plate located above the rubber cone is fixedly provided at one end of the steel wire rope away from the slider, and a blocking piston adapted to the slot is provided below the lifting plate, a fixed spring is fixedly provided on the bottom surface of the lifting plate, and one end of the fixed spring away from the lifting plate is fixedly connected to the rubber cone, a first fixed pulley assembly is provided inside the hollow rubber column, a second fixed pulley assembly is provided inside the rubber cone, and both the second fixed pulley assembly and the first fixed pulley assembly are adapted to the steel wire rope for changing the force direction of the steel wire rope.

[0012] Preferably, the cooling component includes a delivery pipe fixedly connected to the base of the cache box, and the water outlet end of the delivery pipe is fixedly connected to a pressure pump, the water outlet end of the pressure pump is fixedly connected to a connecting pipe, and the end of the connecting pipe away from the pressure pump passes through a positioning seat and is fixedly connected to one end of a hollow rubber column, one side of the cache box base is fixedly connected to a water inlet pipe, and an electronic valve is removably installed on the water inlet pipe.

[0013] Preferably, a buffer spring is fixedly disposed on the inner top surface of the guide groove, and a pressure reducing piston is disposed at one end of the buffer spring.

[0014] Preferably, a hydraulic cylinder is detachably installed above the base of the cache box, and a lifting plate is fixedly provided on the top surface of the hydraulic cylinder, a demolding rod is fixedly provided on the top surface of the lifting plate, and the end of the demolding rod away from the lifting plate movably passes through the lower mold and is flush with the inner bottom surface of the lower mold, a telescopic rod is fixedly provided on the bottom surface of the lifting plate, and the end of the telescopic rod away from the lifting plate is fixedly connected to the base of the cache box.

[0015] Preferably, a fool-proof groove is provided on the bottom surface of the upper mold, and a fool-proof rod is fixedly provided on the top of the lower mold, and the fool-proof rod is adapted to the fool-proof groove.

[0016] A method for using a forming die for a lightweight extruded profile for an automobile, the steps of which are as follows: S1. Open the electronic valve and let cold water flow into the base of the cache box through the water inlet pipe; S2. Place the substrate inside the lower die, and use the anti-fool groove and anti-fool rod to squeeze the upper die toward the lower die through an external extruder. Use external force to press the slider, and the slider will push the return spring to generate elastic force. When the slider moves to the limit groove position, the elastic force of the return spring pushes the slider to insert into the limit groove, so as to firmly connect the upper die and the lower die, thereby extruding the profile; S3. After the profile is formed, the pressure pump is started. The pressure pump draws cold water from the base of the buffer box into the connecting pipe through the delivery pipe. The cold water in the connecting pipe passes through the slot hole and enters the guide groove, which is convenient for reducing the temperature of the profile, thereby improving the efficiency of profile forming and demoulding; S4. As the cold water is introduced under pressure, the cold water will squeeze the rubber cone, and the rubber cone will expand and become larger, which will drive the second fixed pulley assembly to move. The second fixed pulley assembly will pull the wire rope, and one end of the wire rope will pull the slider away from the limit groove, so that the upper mold and the lower mold are unlocked. At the same time, the other end of the wire rope will pull the lifting plate down, and the lifting plate will push the blocking piston into the slot hole. When the cold water continues to be introduced under pressure, the rubber cone continues to expand, which will cause a gap between the upper mold and the lower mold. The gap gradually releases pressure, which will help reduce the impact of the pressure difference on the profile and improve the quality of the profile. S5. When the pressure difference gradually decreases, start the extruder to lift the upper mold and start the hydraulic cylinder. The hydraulic cylinder will push the lifting plate up. The lifting plate will push the demoulding rod up, making it easier for the demoulding rod to push the profile out of the lower mold, which has high work efficiency.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the molding die of the lightweight extruded profile of the automobile is convenient for cooling the profile when demolding, and is convenient for balancing the internal and external pressure difference of the profile that has not been completely cooled before the mold is demolded, thereby improving the quality of the produced profile, and the specific contents are as follows; 1. When the molding die of the lightweight extruded profile of the automobile is in use, after the profile is formed, the pressure pump is started, and the pressure pump draws cold water inside the base of the buffer box into the connecting pipe through the delivery pipe. The cold water in the connecting pipe is convenient to enter the guide groove through the groove hole, so as to reduce the temperature of the profile, thereby improving the efficiency of profile forming and demoulding.

[0018] 2. As the cold water is pressurized and introduced, the cold water will squeeze the rubber cone, and the rubber cone will expand and become larger, which will drive the second fixed pulley assembly to move. The second fixed pulley assembly will pull the wire rope, and one end of the wire rope will pull the slider away from the limit groove, so that the upper mold and the lower mold are unlocked. At the same time, the other end of the wire rope will pull the lifting plate down, and the lifting plate will push the blocking piston into the slot. When the cold water continues to flow in under pressure, the rubber cone continues to expand, which will cause a gap between the upper mold and the lower mold. The gradual release of pressure in the gap will facilitate the reduction of the impact of the pressure difference on the profile and improve the quality of the profile.

[0019] 3. When producing profiles, under high temperature conditions, there will be liquefied metal pressure inside the lower mold or the upper mold. If the lower mold and the upper mold are opened directly, the liquid may boil and spray out quickly due to the sudden drop in pressure. However, opening a small gap first can gradually reduce the pressure inside the container, avoiding violent boiling and spraying of the liquid, which is safer.

[0020] 4. When producing profiles, place the substrate inside the lower mold, and use an external extruder to squeeze the upper mold toward the lower mold. At the same time, use external force to press the slider, and the slider will push the reset spring to generate elastic force. When the slider moves to the limit groove position inside the guide groove, the elastic force of the reset spring pushes the slider to insert into the limit groove, which is convenient for firmly connecting the upper mold and the lower mold, improving the stability of the mold when producing profiles, thereby producing high-quality profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall split structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the upper mold of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the lower mold of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the lower mold of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the cooling component of the present invention; Figure 8 It is a schematic diagram of the connection structure of the guide groove, the rubber cone and the hollow rubber column of the present invention; Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point B.

[0022] In the figure: 1, base; 21, upper mold; 22, upper cavity; 23, foolproof groove; 24, guide groove; 30, electric heating plate; 31, lower mold; 32, foolproof rod; 33, support block; 34, cache box base; 35, cooling component; 36, water inlet pipe; 37, positioning seat; 38, hydraulic cylinder; 240, buffer spring; 241, pressure reducing piston; 242, limit groove; 350, conveying pipeline; 351, Pressure pump; 352, connecting pipe; 370, hollow rubber column; 371, rubber cone; 372, groove; 373, slide; 374, return spring; 375, slider; 376, wire rope; 377, lifting plate; 378, first fixed pulley assembly; 379, second fixed pulley assembly; 380, lifting plate; 381, demoulding rod; 382, ​​telescopic rod; 3770, fixing spring; 3771, blocking piston. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 9The present invention provides a technical solution: a forming die for a lightweight extruded profile of an automobile and a method for using the same, comprising a base 1, a cache box base 34 is fixedly arranged on the top surface of the base 1, and a support block 33 is arranged on the top surface of the cache box base 34, an electric heating plate 30 is fixedly arranged on the top surface of the support block 33, and a lower mold 31 is arranged above the electric heating plate 30, a positioning seat 37 is fixedly arranged above the electric heating plate 30 and located on the outer side of the lower mold 31, and a hollow rubber column 370 is fixedly arranged on the top surface of the positioning seat 37, a rubber cone 371 is integrally arranged on the top surface of the hollow rubber column 370, and a groove 372 is opened on the rubber cone 371, and the hollow rubber A slide groove 373 is provided inside the column 370, and a return spring 374 is fixedly provided inside the slide groove 373, a slider 375 is fixedly provided at one end of the return spring 374, and a steel wire rope 376 is fixedly provided on one side of the slider 375 located inside the return spring 374, a lifting plate 377 located above the rubber cone 371 is fixedly provided at one end of the steel wire rope 376 away from the slider 375, and a blocking piston 3771 adapted to the slot 372 is provided below the lifting plate 377, a fixing spring 3770 is fixedly provided on the bottom surface of the lifting plate 377, and one end of the fixing spring 3770 away from the lifting plate 377 is fixedly connected to the rubber cone 371; An upper mold 21 is placed on the top surface of the electric heating plate 30, and a water-passing cavity is arranged inside the upper mold 21. The water-passing cavity is communicated with the guide groove 24, so that cold water can take away the temperature inside the upper cavity 22 and cool the profile. A connecting plate 20 is fixedly arranged on the top surface of the upper mold 21, and a connecting piece 10 connected to the extruder is fixedly arranged above the connecting plate 20 near the center. An upper cavity 22 is arranged on the bottom surface of the upper mold 21, and the upper cavity 22 is adapted to the lower mold 31. A guide groove 24 adapted to the hollow rubber column 370 is arranged on the bottom surface of the upper mold 21, and a limiting groove 242 engaged with the slider 375 is opened inside the guide groove 24.

[0025] like Figure 1 and Figure 4-Figure 7 As shown, one side of the cache box base 34 is fixedly connected to a water inlet pipe 36, and an electronic valve is detachably installed on the water inlet pipe 36, one side of the cache box base 34 is fixedly connected to a cooling component 35 located above the base 1, and the cooling component 35 is used to supply water to the hollow rubber column 370, the cooling component 35 includes a delivery pipe 350 fixedly connected to the cache box base 34, and the water outlet end of the delivery pipe 350 is fixedly connected to a pressure pump 351, the water outlet end of the pressure pump 351 is fixedly connected to a connecting pipe 352, and the end of the connecting pipe 352 away from the pressure pump 351 passes through the positioning seat 37 and is fixedly connected to one end of the hollow rubber column 370.

[0026] Through the above-mentioned structural design, when in use, open the electronic valve, and introduce cold water into the cache box base 34 through the water inlet pipe 36. At the same time, start the pressure pump 351. The pressure pump 351 will absorb the cold water inside the cache box base 34 through the delivery pipe 350 and enter the connecting pipe 352. The cold water in the connecting pipe 352 can easily enter the guide groove 24 through the groove hole 372, so as to reduce the temperature of the profile, thereby improving the efficiency of profile forming and demolding.

[0027] like Figure 4 and Figure 6 As shown, a hydraulic cylinder 38 is removably installed above the cache box base 34, and a lifting plate 380 is fixedly provided on the top surface of the hydraulic cylinder 38, a demolding rod 381 is fixedly provided on the top surface of the lifting plate 380, and the end of the demolding rod 381 away from the lifting plate 380 is movable through the lower mold 31 and is flush with the inner bottom surface of the lower mold 31, a telescopic rod 382 is fixedly provided on the bottom surface of the lifting plate 380, and the end of the telescopic rod 382 away from the lifting plate 380 is fixedly connected to the cache box base 34.

[0028] Through the above structural design, when demoulding, the hydraulic cylinder 38 is started, and the hydraulic cylinder 38 is convenient for pushing the lifting plate 380 to rise. The rising of the lifting plate 380 will push the demoulding rod 381 to rise, so that the demoulding rod 381 can push the profile to separate from the lower mold 31, and the working efficiency is high.

[0029] like Figure 8 and Fig. 9 As shown, a buffer spring 240 is fixedly provided on the inner top surface of the guide groove 24, and a pressure reducing piston 241 is provided at one end of the buffer spring 240. When cold water passes through the groove hole 372, an impact force will be generated. The buffer spring 240 and the pressure reducing piston 241 are convenient for offsetting the impact force to prevent the inner wall of the guide groove 24 from being damaged by water flow impact after long-term use; a first fixed pulley assembly 378 is provided inside the hollow rubber column 370, and a second fixed pulley assembly 379 is provided inside the rubber cone 371, and the second fixed pulley assembly 379 and the first fixed pulley assembly 378 are both adapted to the wire rope 376 for changing the force direction of the wire rope 376. The first fixed pulley assembly 378 and the second fixed pulley assembly 379 are convenient for changing the force direction of the wire rope 376, thereby facilitating improving the smoothness of the wire rope 376 pulling the slider 375 or the lifting plate 377.

[0030] like Figure 3 and Figure 4 As shown, the bottom surface of the upper mold 21 is provided with an anti-idiot groove 23, and the upper surface of the lower mold 31 is fixedly provided with an anti-idiot rod 32, and the anti-idiot rod 32 is adapted to the anti-idiot groove 23, and the anti-idiot rod 32 and the anti-idiot groove 23 are used to prevent incorrect connection or erroneous connection between the upper mold 21 and the lower mold 31.

[0031] A method for using a forming die for a lightweight extruded profile for an automobile, the steps of which are as follows: S1, open the electronic valve and let cold water flow into the cache box base 34 through the water inlet pipe 36; S2, placing the substrate inside the lower mold 31, and using the anti-idiot groove 23 and the anti-idiot rod 32 to squeeze the upper mold 21 toward the lower mold 31 through an external extruder, and using external force to press the slider 375, the slider 375 will push the return spring 374 to generate elastic force, when the slider 375 moves to the position of the limit groove 242, the elastic force of the return spring 374 pushes the slider 375 to insert into the limit groove 242, so as to firmly connect the upper mold 21 and the lower mold 31, thereby extruding the profile; S3. After the profile is formed, the pressure pump 351 is started. The pressure pump 351 draws cold water from the buffer box base 34 into the connecting pipe 352 through the delivery pipe 350. The cold water in the connecting pipe 352 enters the guide groove 24 through the groove hole 372, so as to reduce the temperature of the profile, thereby improving the efficiency of profile forming and demoulding. S4. As the cold water is introduced under pressure, the cold water will squeeze the rubber cone 371, and the rubber cone 371 will expand and become larger, which will drive the second fixed pulley assembly 379 to move. The second fixed pulley assembly 379 will pull the wire rope 376, and one end of the wire rope 376 will pull the slider 375 away from the limiting groove 242, so that the upper mold 21 and the lower mold 31 are unlocked. At the same time, the other end of the wire rope 376 will pull the lifting plate 377 down, and the lifting plate 377 will push the blocking piston 3771 to insert into the groove hole 372. When the cold water continues to be introduced under pressure, the rubber cone 371 continues to expand, which will cause a gap between the upper mold 21 and the lower mold 31. The gap gradually releases the pressure, which will help reduce the impact of the pressure difference on the profile and improve the quality of the profile. S5. When the pressure difference gradually decreases, start the extruder to lift the upper mold 21 and start the hydraulic cylinder 38. The hydraulic cylinder 38 facilitates the lifting plate 380 to rise. The lifting plate 380 will push the demolding rod 381 to rise, making it easier for the demolding rod 381 to push the profile out of the lower mold 31, and the working efficiency is high.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A molding die for a lightweight extruded profile for an automobile, comprising a base (1), wherein a buffer box base (34) is disposed at the upper end of the base (1), a support block (33) is disposed at the upper end of the buffer box base (34), and an electric heating plate (30) is disposed at the top of the support block (33), characterized in that: The invention comprises a lower mold (31), wherein the lower mold (31) is arranged above the electric heating plate (30) near the center, an upper mold (21) is detachably installed directly above the lower mold (31), and an upper cavity (22) is arranged on the bottom surface of the upper mold (21), a guide groove (24) is arranged on the bottom surface of the upper mold (21), a water-passing cavity is arranged inside the upper mold (21), and the water-passing cavity is communicated with the guide groove (24), a rubber cone (371) is arranged below the guide groove (24), and a slot (372) is opened in the rubber cone (371), and a connecting component is arranged at the lower end of the rubber cone (371), and the connecting component is used to cooperate with the rubber cone (371) to connect the lower mold (31) and the upper mold (2 1), a slide groove (373) is provided on the outer wall of the connecting component, and a locking component is arranged inside the slide groove (373), and the locking component locks the upper mold (21) and the lower mold (31) when the rubber cone (371) shrinks. The outer side of the buffer box base (34) is fixedly connected with a cooling component, and the cooling component (35) cooperates with the rubber cone (371) to inject water into the upper mold (21) after the upper mold (21) and the lower mold (31) are locked. An unlocking component is arranged inside the rubber cone (371), and the unlocking component cooperates with the locking component to unlock the upper mold (21) and the lower mold (31) when the rubber cone (371) expands for the first time after being injected with water, and the top of the rubber cone (371) is blocked to facilitate the secondary expansion of the rubber cone (371).

2. The forming die for a lightweight extruded profile for an automobile according to claim 1, characterized in that: The connecting component comprises a hollow rubber column (370) fixedly connected to the rubber cone (371), the bottom surface of the hollow rubber column (370) being fixedly connected to a positioning seat (37), and the bottom surface of the positioning seat (37) being fixedly connected to the top surface of the electric heating plate (30).

3. The forming die for a lightweight extruded profile for an automobile according to claim 2, characterized in that: The locking component comprises a limiting groove (242) provided inside the guide groove (24) and a sliding block (375) engaged with the limiting groove (242); the sliding block (375) is slidably arranged inside the sliding groove (373); a return spring (374) is fixedly arranged on one side of the sliding block (375); and an end of the return spring (374) away from the sliding block (375) is fixedly connected to an inner surface of one side of the sliding groove (373).

4. The forming die for a lightweight extruded profile for an automobile according to claim 3, characterized in that: The unlocking component comprises a steel wire rope (376) fixedly connected to the slider (375); a lifting plate (377) located above the rubber cone (371) is fixedly arranged at one end of the steel wire rope (376) away from the slider (375); a blocking piston (3771) matched with the slot (372) is arranged below the lifting plate (377); a fixing spring (3770) is fixedly arranged on the bottom surface of the lifting plate (377); and one end of the fixing spring (3770) away from the lifting plate (377) is fixedly connected to the rubber cone (371); a first fixed pulley assembly (378) is arranged inside the hollow rubber column (370); a second fixed pulley assembly (379) is arranged inside the rubber cone (371); and both the second fixed pulley assembly (379) and the first fixed pulley assembly (378) are matched with the steel wire rope (376) for changing the force direction of the steel wire rope (376).

5. The forming die for a lightweight extruded profile for automobile according to claim 4, characterized in that: The cooling component (35) includes a delivery pipe (350) fixedly connected to the cache box base (34), and the water outlet end of the delivery pipe (350) is fixedly connected to a pressure pump (351), and the water outlet end of the pressure pump (351) is fixedly connected to a connecting pipe (352), and the end of the connecting pipe (352) away from the pressure pump (351) passes through the positioning seat (37) and is fixedly connected to one end of the hollow rubber column (370), and one side of the cache box base (34) is fixedly connected to a water inlet pipe (36), and an electronic valve is detachably installed on the water inlet pipe (36).

6. The forming die for a lightweight extruded profile for automobile according to claim 5, characterized in that: A buffer spring (240) is fixedly arranged on the inner top surface of the guide groove (24), and a pressure reducing piston (241) is arranged at one end of the buffer spring (240).

7. The forming die for a lightweight extruded profile for automobile according to claim 1, characterized in that: A hydraulic cylinder (38) is detachably mounted above the cache box base (34), and a lifting plate (380) is fixedly arranged on the top surface of the hydraulic cylinder (38), a demoulding rod (381) is fixedly arranged on the top surface of the lifting plate (380), and one end of the demoulding rod (381) away from the lifting plate (380) movably passes through the lower mold (31) and is flush with the inner bottom surface of the lower mold (31), and a telescopic rod (382) is fixedly arranged on the bottom surface of the lifting plate (380), and one end of the telescopic rod (382) away from the lifting plate (380) is fixedly connected to the cache box base (34).

8. The forming die for a lightweight extruded profile for automobile according to claim 1, characterized in that: The bottom surface of the upper mold (21) is provided with an anti-fool groove (23), and the top of the lower mold (31) is fixedly provided with an anti-fool rod (32), and the anti-fool rod (32) is matched with the anti-fool groove (23).

9. The method for using the forming die of a lightweight extruded profile for automobile according to claims 1-8, characterized in that: The specific steps are: S1, opening the electronic valve, and introducing cold water into the cache box base (34) through the water inlet pipe (36); S2, placing the substrate inside the lower mold (31), and using an external extruder to squeeze the upper mold (21) toward the lower mold (31) using the anti-fool groove (23) and the anti-fool rod (32), and using an external extruder to press the slider (375), the slider (375) will push the return spring (374) to generate elastic force, and when the slider (375) moves to the position of the limit groove (242), the elastic force of the return spring (374) pushes the slider (375) to insert into the limit groove (242), so as to firmly connect the upper mold (21) and the lower mold (31), thereby extruding the profile; S3. After the profile is formed, the pressure pump (351) is started. The pressure pump (351) draws cold water from the inside of the buffer box base (34) into the connecting pipe (352) through the delivery pipe (350). The cold water in the connecting pipe (352) can easily enter the guide groove (24) through the groove hole (372), thereby reducing the temperature of the profile and improving the efficiency of profile forming and demoulding; S4. As the cold water is introduced under pressure, the cold water squeezes the rubber cone (371), and the rubber cone (371) expands and becomes larger, which drives the second fixed pulley assembly (379) to move. The second fixed pulley assembly (379) pulls the wire rope (376), and one end of the wire rope (376) pulls the slider (375) away from the limit groove (242), so that the upper mold (21) and the lower mold (31) are unlocked. At the same time, the other end of the wire rope (376) pulls the lifting plate (377) down, and the lifting plate (377) pushes the blocking piston (3771) to insert into the groove hole (372). When the cold water continues to be introduced under pressure, the rubber cone (371) continues to expand, which will cause a gap between the upper mold (21) and the lower mold (31). The gap gradually releases pressure, which will help reduce the impact of the pressure difference on the profile and improve the quality of the profile. S5. When the pressure difference gradually decreases, the extruder is started to lift the upper mold (21) and the hydraulic cylinder (38) is started. The hydraulic cylinder (38) facilitates the lifting plate (380) to rise. The lifting plate (380) will push the demoulding rod (381) to rise, so that the demoulding rod (381) can push the profile to separate from the lower mold (31), thereby achieving high working efficiency.

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