Aluminum material stretching device and stretching method for aluminum bottle cap

Abstract

The present invention provides an aluminum material stretching device and stretching method for aluminum bottle caps, comprising a machine base, a circular box body is fixedly installed on the top of the machine base through a bracket, a material tray is rotatably connected in the circular box body, the thickness of the material tray is consistent with the length of the aluminum material, the circumferential side wall of the material tray is provided with a plurality of material slots for filling the aluminum material, the notches of the material slots abut against the inner wall of the circular box body, the upper, lower, left and right sides of the circular box body are respectively a loading position, a stretching position, a unloading position and a heating position, a heating assembly is provided on the front and rear sides of the circular box body corresponding to the heating position, and a stretching port is provided on the front and rear sides of the circular box body corresponding to the stretching position. The device can continuously complete the stretching process of the aluminum material, automatically perform the loading, heating, stretching and unloading processes, can quickly heat the aluminum material before stretching, improve the stretching efficiency, and can also perform rotational extrusion during the stretching process to improve the overall uniformity of the stretching.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum material processing, and in particular to an aluminum material stretching device and a stretching method for an aluminum bottle cap. Background Art

[0002] Aluminum bottle caps are made of aluminum materials. Aluminum bottle caps are widely used in many fields, mainly including the packaging of alcoholic beverages, oral liquids and medical and health products. Aluminum bottle caps are made of aluminum materials through stretching, slicing, stamping, cutting and other steps.

[0003] The current stretching device cannot achieve a continuous stretching process and requires manual loading and unloading. It is not equipped with a heating element and directly cold-draws the aluminum material, which is prone to cracks. During stretching, it is also easy to have uneven conditions with thick ends and thin middle, which affects the quality of subsequent slicing. Summary of the invention

[0004] In view of the above problems, the present invention provides an aluminum material stretching device and a stretching method for aluminum bottle caps. The device can continuously complete the stretching process of the aluminum material and automatically perform the loading, heating, stretching and unloading processes. It can quickly heat the aluminum material before stretching to improve the stretching efficiency, and can also perform rotational extrusion during the stretching process to improve the overall uniformity of the stretching.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] An aluminum material stretching device for aluminum bottle caps comprises a machine base, a circular box body is fixedly installed on the top of the machine base through a bracket, a material tray is rotatably connected in the circular box body, the thickness of the material tray is consistent with the length of the aluminum material, a plurality of material slots for filling the aluminum material are arranged on the circumferential side wall of the material tray, the slots of the material slots abut against the inner wall of the circular box body, the upper, lower, left and right sides of the circular box body are respectively an upper material position, a stretching position, a lower material position and a heating position, a heating assembly is arranged on the front and rear sides of the circular box body corresponding to the heating position, and the circular box body is provided with a plurality of material slots for filling the aluminum material, and the slots of the material slots abut against the inner wall of the circular box body. Stretching openings are provided on the front and rear sides of the body corresponding to the stretching position, and stretching heads that can move toward or away from each other are installed on both sides of the stretching position above the machine base, and a clamping assembly for clamping the two ends of the aluminum material is provided at the end of the stretching head. The clamping assembly includes a clamping groove arranged at the end of the stretching head, and a three-jaw chuck is installed in the clamping groove. A sleeve that can move along the stretching direction is mounted on the stretching head, and a swivel is rotatably connected to the end of the sleeve, and a plurality of pressure wheels that can move radially synchronously are installed in the circumference of the swivel.

[0007] Preferably, a loading port is provided at the top of the circular box body corresponding to the loading position, and a material channel is connected to the top of the loading port, and a plurality of aluminum materials are vertically stacked in the material channel.

[0008] Preferably, a rotating shaft is rotatably connected to the middle of the circular box, the material tray is fixedly mounted on the rotating shaft, and a rotating seat docked with the rotating shaft is fixedly mounted on the side wall of the circular box.

[0009] Preferably, the heating assembly includes a mounting cover fixed on the front and rear sides of the heating position, the mounting cover is connected to the circular box, and an arc-shaped conductive plate is elastically installed in the mounting cover by a spring, the front and rear arc-shaped conductive plates are respectively a positive plate and a negative plate, and the arc surface end of the arc-shaped conductive plate extends into the circular box.

[0010] Preferably, a longitudinal mounting groove is provided on the machine base, a double-headed hydraulic cylinder is fixedly installed in the mounting groove, both telescopic ends of the double-headed hydraulic cylinder are fixedly connected to pulling arms, and the upper end of the pulling arm is fixedly connected to the corresponding stretching head end.

[0011] Preferably, the circular box body is provided with a material discharge port at a position corresponding to the material discharge position, a material guide plate is fixed at the bottom of the material discharge port, and arc-shaped ports communicating with the stretching port are provided at the front and rear sides of the circular box body corresponding to the material discharge position.

[0012] Preferably, a strip-shaped cavity is provided in the stretching head along its length direction, a threaded rod is rotatably connected in the strip-shaped cavity, a movable arm is threadedly connected on the threaded rod, strip-shaped openings for extending the corresponding ends of the movable arm are provided on the upper and lower sides of the stretching head, the two extending ends of the movable arm are fixedly connected to the tail end of the sleeve, and a first motor that can drive the threaded rod to rotate is installed at the tail end of the stretching head.

[0013] Preferably, a gear ring is fixedly mounted on the inner end surface of the rotating ring, a mounting opening is provided on the end side wall of the sleeve, a second motor is mounted in the mounting opening, and a gear meshing with the gear ring is fixed on the output end of the second motor.

[0014] Preferably, a plurality of electric push rods are fixedly mounted on the circumferential inner wall of the rotating ring, the pressure wheel is rotatably connected to the telescopic end of the corresponding electric push rod, an electrical connection head electrically connected to the corresponding electric push rod is embedded in the circumferential side wall of the rotating ring, an electrical connection ring in contact with the plurality of electrical connection heads is embedded in the inner wall at the end of the sleeve, and the electrical connection ring is externally connected to a power supply and a controller.

[0015] The present invention also provides an aluminum material stretching method for an aluminum bottle cap, comprising the following steps:

[0016] S1. Multiple cylindrical aluminum materials are piled into the material channel. The rotating seat drives the material tray to rotate through the rotating shaft. The material trough turns to the loading position, and a single aluminum material is filled into the material trough to realize the cyclic loading process.

[0017] S2, the aluminum material is transferred to the heating position, a pair of arc-shaped conductive plates are placed against both ends of the aluminum material, the positive plate and the negative plate supply power, and the cylindrical aluminum material acts as a resistor and generates heat after being energized, and is heated to a temperature at which it is easy to stretch;

[0018] S3. The heated aluminum material is turned to the stretching position, a pair of stretching heads move toward each other, the two ends of the aluminum material are inserted into the corresponding clamping grooves, the two ends of the aluminum material are clamped by the three-claw chuck, and the double-head hydraulic cylinder is started to drive the pair of stretching heads to move back to each other, so that the aluminum material can be stretched;

[0019] S4, during the stretching process, the second motor is started, the rotating ring is driven to rotate through the gear and the gear ring, and then the electric push rod is controlled to extend and retract through the controller, driving multiple pressing wheels to press against the side wall of the aluminum material, and the multiple pressing wheels rotate around the aluminum material. As the stretching progresses, the first motor is started to drive the threaded rod to rotate, and then the sleeve is driven to move through the moving arm, driving multiple pressing wheels to move from both sides to the middle, thereby improving the uniformity of stretching;

[0020] S5. After stretching is completed, the machine moves to the unloading position and the aluminum material rolls out through the unloading port.

[0021] The beneficial effects of the present invention are:

[0022] 1. By installing the material tray, loading position, heating position, stretching position and unloading position, the rotating seat drives the material tray to rotate through the rotating shaft, the material trough turns to the loading position, and a single aluminum material is filled into the material trough to realize the cyclic loading process, and then turns to the heating position to heat the aluminum material, turns to the stretching position for stretching, and after the stretching is completed, turns to the unloading position, and the aluminum material rolls out through the unloading port, which can continuously complete the stretching process of the aluminum material, and automatically perform the loading, heating, stretching and unloading processes.

[0023] 2. By installing the heating component, the aluminum material is turned to the heating position, a pair of arc-shaped conductive plates are pressed against both ends of the aluminum material, the positive plate and the negative plate are powered, and the cylindrical aluminum material is heated after being energized as a resistor, and it is quickly heated to a temperature that is easy to stretch, thereby improving the stretching effect.

[0024] 3. By installing a pair of stretching heads, clamping components, sleeves, swivels and multiple pressure wheels, the heated aluminum material is turned to the stretching position, and the pair of stretching heads move toward each other. The two ends of the aluminum material are inserted into the corresponding clamping grooves. The two ends of the aluminum material are clamped by a three-jaw chuck, and the double-head hydraulic cylinder is started to drive the pair of stretching heads to move back to each other, so that the aluminum material can be stretched. During the stretching process, the second motor is started to drive the swivel to rotate through the gears and the gear ring, and then the controller controls the electric push rod to extend and retract, driving multiple pressure wheels to press against the side wall of the aluminum material, and multiple pressure wheels rotate around the aluminum material. As the stretching progresses, the first motor is started to drive the threaded rod to rotate, and then the sleeve is driven to move through the moving arm, driving multiple pressure wheels to move from both sides to the middle, thereby improving the uniformity of stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1AA section view in FIG.

[0027] Figure 3 for Figure 1 BB section diagram;

[0028] Figure 4 A schematic cross-sectional view of a sleeve and a stretching head provided by the present invention;

[0029] Figure 5 for Figure 4 A schematic diagram of the structure at position C in FIG.

[0030] Figure 6 This is a schematic front view of the sleeve and the stretching head proposed by the present invention.

[0031] In the figure: 1 machine base, 2 bracket, 3 material tray, 4 circular box, 5 rotating shaft, 6 material trough, 7 feeding port, 8 stretching port, 9 material channel, 10 aluminum material, 11 loading position, 12 heating position, 13 stretching position, 14 mounting groove, 15 pulling arm, 16 double-head hydraulic cylinder, 17 first motor, 18 stretching head, 19 sleeve, 20 rotating seat, 21 feeding port, 22 moving arm, 23 threaded rod, 24 strip cavity, 25 strip port, 26 clamping groove, 27 three-claw chuck, 28 pressure wheel, 29 electric push rod, 30 swivel, 31 second motor, 32 gear, 33 mounting port, 34 gear ring, 35 connecting ring, 36 connecting head, 37 mounting cover, 38 arc-shaped conductive plate, 39 spring. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Reference Figure 1-6, an aluminum material stretching device for aluminum bottle caps, including a machine base 1, a circular box body 4 is fixedly installed on the top of the machine base 1 through a bracket 2, a material tray 3 is rotatably connected in the circular box body 4, the thickness of the material tray 3 is consistent with the length of the aluminum material 10, and the circumferential side wall of the material tray 3 is provided with a plurality of material troughs 6 for filling the aluminum material 10, and the notches of the material troughs 6 are against the inner wall of the circular box body 4, and the upper, lower, left and right sides of the circular box body 4 are respectively provided with a material loading position 11, a stretching position 13, a material loading position and a heating position 12, and a material loading port 21 is provided at the top of the circular box body 4 corresponding to the material loading position 11, and the top of the material loading port 21 is connected with a material channel 9, and the material channel 9 is vertically There are multiple aluminum materials 10 stacked, and the middle part of the circular box 4 is rotatably connected with a rotating shaft 5. The material tray 3 is fixedly installed on the rotating shaft 5. The side wall of the circular box 4 is fixedly installed with a rotating seat 20 connected to the rotating shaft 5. The rotating seat 20 drives the material tray 3 to rotate through the rotating shaft 5, and the material trough 6 is rotated to the loading position 11. The single aluminum material 10 is filled into the material trough 6 to realize the cyclic loading process, and then it is transferred to the heating position 12 to heat the aluminum material, and then transferred to the stretching position 13 to stretch. After the stretching is completed, it is transferred to the unloading position, and the aluminum material 10 rolls out through the unloading port 7, which can continuously complete the stretching process of the aluminum material, and automatically perform the loading, heating, stretching and unloading processes.

[0035] Furthermore, a discharge port 7 is provided at the corresponding discharge position of the circular box 4, and a guide plate is fixed at the bottom of the discharge port 7. The front and rear sides of the circular box 4 corresponding to the discharge position are provided with arc-shaped openings connected with the stretching opening 8. After the stretching is completed, it turns to the discharge position, and both ends of the aluminum material 10 pass through the arc-shaped openings and roll out through the discharge port 7.

[0036] The circular box 4 is provided with heating components on both the front and rear sides corresponding to the heating position 12. The heating components include mounting covers 37 fixed on the front and rear sides of the heating position 12. The mounting covers 37 are connected to the circular box 4. Arc-shaped conductive plates 38 are elastically installed in the mounting covers 37 through springs 39. The front and rear arc-shaped conductive plates 38 are respectively a positive plate and a negative plate. The arc ends of the arc-shaped conductive plates 38 extend into the circular box 4. A pair of arc-shaped conductive plates 38 are in contact with both ends of the aluminum material 10. The positive plate and the negative plate are powered by electricity. The columnar aluminum material 10 is heated after being energized as a resistor, and is quickly heated to a temperature that is easy to stretch, thereby improving the stretching effect.

[0037] Stretching openings 8 are provided on the front and rear sides of the corresponding stretching position 13 on the circular box body 4. Stretching heads 18 that can move toward or away from each other are installed on both sides of the stretching position 13 above the machine base 1. The end of the stretching head 18 is provided with a clamping assembly for clamping the two ends of the aluminum material 10. The clamping assembly includes a clamping groove 26 arranged at the end of the stretching head 18, and a three-jaw chuck 27 is installed in the clamping groove 26. A longitudinal mounting groove 14 is provided on the machine base 1, and a double-headed hydraulic cylinder 16 is fixedly installed in the mounting groove 14. The two telescopic ends of the double-headed hydraulic cylinder 16 are fixedly connected with a pulling arm 15, and the upper end of the pulling arm 15 is fixedly connected to the corresponding end of the stretching head 18. The two ends of the aluminum material 10 are inserted into the corresponding clamping groove 26, and the two ends of the aluminum material 10 are clamped by the three-jaw chuck 27. The double-headed hydraulic cylinder 16 is started to drive a pair of stretching heads 18 to move away from each other, so that the aluminum material 10 can be stretched.

[0038] The stretching head 18 is provided with a sleeve 19 that can move along the stretching direction, and a strip-shaped cavity 24 is provided in the stretching head 18 along its length direction, and a threaded rod 23 is rotatably connected in the strip-shaped cavity 24, and a moving arm 22 is threadedly connected to the threaded rod 23, and a strip-shaped opening 25 for extending the corresponding end of the moving arm 22 is provided on both the upper and lower sides of the stretching head 18, and the two extended ends of the moving arm 22 are fixedly connected to the tail end of the sleeve 19, and a first motor 17 that can drive the threaded rod 23 to rotate is installed at the tail end of the stretching head 18, and a rotating ring 30 is rotatably connected to the end of the sleeve 19, and a gear ring 34 is fixedly installed on the inner end surface of the rotating ring 30, and the end side of the sleeve 19 is fixedly connected to the inner end surface of the rotating ring 30. A mounting opening 33 is provided on the wall, and a second motor 31 is installed in the mounting opening 33. A gear 32 meshing with a gear ring 34 is fixed to the output end of the second motor 31. A plurality of pressure wheels 28 that can move radially synchronously are installed in the circumference of the rotating ring 30. When the second motor 31 is started, the rotating ring 30 is driven to rotate through the gear 32 and the gear ring 34. The plurality of pressure wheels 28 press against the side wall of the aluminum material 10, and the plurality of pressure wheels 28 rotate around the aluminum material 10. As the stretching process progresses, the first motor 17 is started to drive the threaded rod 23 to rotate, and then the sleeve 19 is driven to move through the movable arm 22, and the plurality of pressure wheels 28 are driven to move from both sides to the middle, thereby improving the uniformity of the stretching.

[0039] A plurality of electric push rods 29 are fixedly mounted on the circumferential inner wall of the swivel 30, and the pressure wheel 28 is rotatably connected to the telescopic end of the corresponding electric push rod 29. An electric head 36 electrically connected to the corresponding electric push rod 29 is embedded in the circumferential side wall of the swivel 30, and an electric ring 35 in contact with the plurality of electric heads 36 is embedded in the inner wall at the end of the sleeve 19. The electric ring 35 is connected to an external power source and a controller. The electric ring 35 can synchronously supply power to the plurality of electric heads 36 in a rotating state. The controller can control the telescopic degree of the electric push rod 29, and then can adjust the extrusion pressure of the pressure wheel 28 according to the position on the aluminum material to avoid being thick at both ends and thin in the middle, thereby improving the uniformity of stretching.

[0040] The present invention also provides an aluminum material stretching method for an aluminum bottle cap, comprising the following steps:

[0041] S1. Multiple cylindrical aluminum materials 10 are stacked in the material channel 9. The rotating seat 20 drives the material tray 3 to rotate through the rotating shaft 5. The material trough 6 rotates to the loading position 11. A single aluminum material 10 is filled into the material trough 6 to realize the cyclic loading process.

[0042] S2, the aluminum material 10 is transferred to the heating position 12, a pair of arc-shaped conductive plates 38 are pressed against both ends of the aluminum material 10, the positive plate and the negative plate supply power, and the cylindrical aluminum material 10 is heated after being energized as a resistor, and is heated to a temperature at which it is easy to stretch;

[0043] S3, the heated aluminum material 10 is transferred to the stretching position 13, a pair of stretching heads 18 are moved toward each other, the two ends of the aluminum material 10 are inserted into the corresponding clamping grooves 26, the two ends of the aluminum material 10 are clamped by the three-claw chuck 27, and the double-headed hydraulic cylinder 16 is started to drive the pair of stretching heads 18 to move away from each other, so that the aluminum material 10 can be stretched;

[0044] S4, during the stretching process, the second motor 31 is started, and the rotating ring 30 is driven to rotate through the gear 32 and the gear ring 34, and then the electric push rod 29 is controlled by the controller to extend and retract, driving the multiple pressing wheels 28 to press against the side wall of the aluminum material 10, and the multiple pressing wheels 28 rotate around the aluminum material 10. As the stretching progresses, the first motor 17 is started to drive the threaded rod 23 to rotate, and then the sleeve 19 is driven to move through the moving arm 22, driving the multiple pressing wheels 28 to move from both sides to the middle, thereby improving the uniformity of the stretching;

[0045] S5, after stretching is completed, the process turns to the unloading position, and the aluminum material 10 rolls out through the unloading port 7.

[0046] Working principle: the rotating seat 20 drives the material tray 3 to rotate through the rotating shaft 5, the material trough 6 rotates to the loading position 11, corresponding to the loading port 21, and a single aluminum material 10 is filled into the material trough 6 to realize the cyclic loading process. The aluminum material 10 rotates to the heating position 12, and a pair of arc-shaped conductive plates 38 contact the two ends of the aluminum material 10. The positive plate and the negative plate supply power. The columnar aluminum material 10 acts as a resistor and generates heat after being energized, and is quickly heated to a temperature at which it is easy to stretch.

[0047] The heated aluminum material 10 is transferred to the stretching position 13, and a pair of stretching heads 18 move toward each other. The two ends of the aluminum material 10 are inserted into the corresponding clamping grooves 26, and the two ends of the aluminum material 10 are clamped by the three-claw chuck 27. The double-headed hydraulic cylinder 16 is started to drive the pair of stretching heads 18 to move away from each other, so that the aluminum material 10 can be stretched. During the stretching process, the second motor 31 is started to drive the rotating ring 30 to rotate through the gear 32 and the gear ring 34, and then the electric push rod 29 is controlled by the controller to extend and retract, driving multiple pressure wheels 28 to press against the side wall of the aluminum material 10, and multiple pressure wheels 28 rotate around the aluminum material 10. As the stretching progresses, the first motor 17 is started to drive the threaded rod 23 to rotate, and then the sleeve 19 is driven to move through the movable arm 22, and multiple pressure wheels 28 are driven to move from both sides to the middle, so as to avoid being thick at both ends and thin in the middle, thereby improving the uniformity of stretching.

[0048] After the stretching is finished, the aluminum material 10 is transferred to the unloading position, and rolled out through the unloading port 7 , so that the stretching process of the aluminum material 10 can be completed continuously.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An aluminum material stretching device for aluminum bottle caps, comprising a machine base (1), characterized in that: A circular box (4) is fixedly mounted on the top of the machine base (1) via a bracket (2), a material tray (3) is rotatably connected inside the circular box (4), the thickness of the material tray (3) being consistent with the length of the aluminum material (10), a plurality of material troughs (6) for filling the aluminum material (10) are provided on the circumferential side wall of the material tray (3), the notches of the material troughs (6) abutting against the inner wall of the circular box (4), the upper, lower, left and right sides of the circular box (4) are respectively an upper material position (11), a stretching position (13), a lower material position and a heating position (12), a heating assembly is provided on both the front and rear sides of the circular box (4) corresponding to the heating position (12), and a corresponding stretching position (13) on the circular box (4) is provided with a heating assembly. A stretching opening (8) is provided on both the front and rear sides of the machine base (1), and a stretching head (18) that can move toward or away from each other is installed on both sides of the stretching position (13) above the machine base (1), and a clamping assembly for clamping the two ends of the aluminum material (10) is provided at the end of the stretching head (18), and the clamping assembly includes a clamping groove (26) arranged at the end of the stretching head (18), and a three-jaw chuck (27) is installed in the clamping groove (26). A sleeve (19) that can move along the stretching direction is mounted on the stretching head (18), and a rotating ring (30) is rotatably connected to the end of the sleeve (19), and a plurality of pressure wheels (28) that can move synchronously radially are installed in the circumference of the rotating ring (30). The heating assembly comprises a mounting cover (37) fixed on both sides of the front and rear of the heating position (12); the mounting cover (37) is in communication with the circular box (4); a circular arc-shaped conductive plate (38) is elastically mounted in the mounting cover (37) via a spring (39); the front and rear circular arc-shaped conductive plates (38) are respectively a positive electrode plate and a negative electrode plate; the arc surface end of the circular arc-shaped conductive plate (38) extends into the circular box (4); The stretching head (18) has a strip-shaped cavity (24) along its length direction, a threaded rod (23) is rotatably connected to the strip-shaped cavity (24), a movable arm (22) is threadedly connected to the threaded rod (23), and strip-shaped openings (25) are provided on the upper and lower sides of the stretching head (18) for the corresponding ends of the movable arm (22) to extend, the two extended ends of the movable arm (22) are fixedly connected to the rear end of the sleeve (19), and a first motor (17) is installed at the rear end of the stretching head (18) for driving the threaded rod (23) to rotate. A gear ring (34) is fixedly mounted on the inner end surface of the rotating ring (30), a mounting opening (33) is provided on the end side wall of the sleeve (19), a second motor (31) is mounted in the mounting opening (33), and a gear (32) meshing with the gear ring (34) is fixed to the output end of the second motor (31). A plurality of electric push rods (29) are fixedly mounted on the circumferential inner wall of the rotating ring (30); the pressure wheel (28) is rotatably connected to the telescopic end of the corresponding electric push rod (29); an electric connection head (36) electrically connected to the corresponding electric push rod (29) is embedded in the circumferential side wall of the rotating ring (30); an electric connection ring (35) in contact with the plurality of electric connection heads (36) is embedded in the inner wall of the end of the sleeve (19); the electric connection ring (35) is externally connected to a power supply and a controller.

2. The aluminum material stretching device for aluminum bottle caps according to claim 1, characterized in that: A loading port (21) is provided at the top of the circular box body (4) corresponding to the loading position (11), and a material channel (9) is connected to the top of the loading port (21), and a plurality of aluminum materials (10) are stacked vertically in the material channel (9).

3. The aluminum material stretching device for aluminum bottle caps according to claim 1, characterized in that: A rotating shaft (5) is rotatably connected to the middle of the circular box (4), the material tray (3) is fixedly mounted on the rotating shaft (5), and a rotating seat (20) docked with the rotating shaft (5) is fixedly mounted on the side wall of the circular box (4).

4. The aluminum material stretching device for aluminum bottle caps according to claim 1, characterized in that: The machine base (1) is provided with a longitudinal mounting groove (14), a double-headed hydraulic cylinder (16) is fixedly mounted in the mounting groove (14), both telescopic ends of the double-headed hydraulic cylinder (16) are fixedly connected to a pulling arm (15), and the upper end of the pulling arm (15) is fixedly connected to the end of a corresponding stretching head (18).

5. The aluminum material stretching device for aluminum bottle caps according to claim 1, characterized in that: The circular box body (4) is provided with a material discharge port (7) at a position corresponding to the material discharge position, a material guide plate is fixed at the bottom of the material discharge port (7), and arc-shaped ports communicating with the stretching port (8) are provided at the front and rear sides of the circular box body (4) corresponding to the material discharge position.

6. A method for stretching aluminum material for an aluminum bottle cap, characterized in that: The following steps are involved: S1, a plurality of cylindrical aluminum materials (10) are stacked in the material channel (9), the rotating seat (20) drives the material tray (3) to rotate through the rotating shaft (5), the material trough (6) rotates to the loading position (11), and a single aluminum material (10) is loaded into the material trough (6), thereby realizing a cyclic loading process; S2, the aluminum material (10) is transferred to the heating position (12), a pair of arc-shaped conductive plates (38) are pressed against both ends of the aluminum material (10), the positive plate and the negative plate are powered, and the columnar aluminum material (10) acts as a resistor to generate heat after being powered on, and is heated to a temperature at which it is easy to stretch; S3, the heated aluminum material (10) is transferred to the stretching position (13), a pair of stretching heads (18) are moved toward each other, the two ends of the aluminum material (10) are inserted into the corresponding clamping grooves (26), the two ends of the aluminum material (10) are clamped by a three-claw chuck (27), and the double-head hydraulic cylinder (16) is started to drive the pair of stretching heads (18) to move away from each other, so that the aluminum material (10) can be stretched; S4, during the stretching process, the second motor (31) is started, and the rotating ring (30) is driven to rotate through the gear (32) and the gear ring (34), and then the electric push rod (29) is controlled by the controller to extend and retract, driving the multiple pressing wheels (28) to press against the side wall of the aluminum material (10), and the multiple pressing wheels (28) rotate around the aluminum material (10). As the stretching progresses, the first motor (17) is started to drive the threaded rod (23) to rotate, and then the sleeve (19) is driven to move through the movable arm (22), driving the multiple pressing wheels (28) to move from both sides to the middle, thereby improving the uniformity of the stretching; S5, after the stretching is finished, the device moves to the unloading position, and the aluminum material (10) rolls out through the unloading port (7).

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