Lithium battery aluminum plastic film manufacturing equipment and process

Abstract

The application relates to the field of stamping equipment, in particular to a lithium battery aluminum-plastic film manufacturing equipment and process, which comprises a machine table, a pit forming mechanism, a cutting mechanism and a clamping mechanism, the pit forming mechanism is used for forming a pit cavity in the film material, the cutting mechanism is used for cutting the film material into a shell, a taking mechanism is arranged between the cutting mechanism and the clamping mechanism, a conveying belt is arranged below the taking mechanism, the taking mechanism comprises a guide frame, a mounting seat and a taking seat, a reversing cylinder for driving the mounting seat is arranged on the guide frame, after the aluminum-plastic film is punched into the shell, the shell is supported by the taking seat, the side supporting plates are expanded to clamp the shell by extruding the surrounding supporting plates by the trigger seat, the shell is clamped more firmly by cooperating with the negative pressure generated by the trigger seat, then the mounting seat and the taking seat are retracted, lowered, transposed and lowered to discharge the material on the guide frame by the reversing cylinder, so that the shell is transported to the conveying belt below, and the subsequent processing procedure can be directly connected.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment, specifically to a lithium battery aluminum-plastic film manufacturing equipment and process. Background Technology

[0002] In the production of aluminum-plastic film for soft-pack lithium batteries, punching is a crucial operation. This involves using a pressure device to drive a mold to punch the aluminum-plastic film, creating two recessed cavities. Then, by folding, the cavities on both sides can encapsulate the battery cells, thus sealing the lithium battery.

[0003] After the membrane material is punched, it becomes a single shell with a large change in shape. Subsequent processes are usually carried out on other equipment, such as cell loading, folding and packaging. In the existing technology, the shells are stacked and transferred to the subsequent processes after being unloaded. It is not possible to directly connect the current process to the subsequent process. Moreover, the intermediate transfer often requires manual assistance in feeding or arranging the materials, which is quite inconvenient. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a lithium battery aluminum-plastic film manufacturing equipment, comprising a machine base and a roller guiding mechanism, a punching mechanism, a cutting mechanism, and a clamping mechanism sequentially mounted on the machine base. A film roll is arranged on the machine base and guided to move by the roller guiding mechanism. The punching mechanism includes an upper and lower die that move relative to each other to form downward-opening cavities in the film. A lower open groove is provided on the top surface of the machine base. The clamping mechanism is slidably mounted on both sides of the lower open groove. The cutting mechanism includes a knife holder spanning the lower open groove and a cutting blade movably mounted on the knife holder, used to cut the film with cavities into shells. A feeding mechanism is provided in the lower open groove between the cutting mechanism and the clamping mechanism, and a conveyor is located below the feeding mechanism. The conveyor belt is equipped with several pressing molds. The feeding mechanism is used to move the housing into the pressing mold below. The feeding mechanism includes guide frames located on both sides of the lower open slot, a central frame rotatably mounted between the guide frames, a mounting seat slidably mounted on the central frame, and a picking seat detachably fixed on the mounting seat. The guide frame is equipped with a reversing cylinder to drive the mounting seat and the picking seat to extend, retract, move, and rotate on the guide frame. The picking seat includes a contact seat and a trigger seat movably mounted in the contact seat via an electromagnetic push rod. The top edge of the contact seat is provided with an elastic side support plate. The side support plate is squeezed by the trigger seat and swings outward to the outside of the contact seat and contacts the pit cavity. The trigger seat is connected to the negative pressure device.

[0005] Furthermore, the material handling seat also includes a mounting frame, the trigger seat is slidably nested on the outside of the mounting frame, the electromagnetic push rod is fixed inside the mounting frame and connected to the trigger seat, and the surrounding contact seat is fixed outside the mounting frame and located outside the trigger seat; the surrounding contact seat has several negative pressure holes with the openings located at the top, the negative pressure holes are connected to external negative pressure equipment, and the negative pressure holes are used to evacuate air from the pit cavity; the material handling seat also includes a contact plate, the top of the mounting frame has a swaying groove, the contact plate is snapped into the swaying groove, the top of the contact plate has a flat surface for contacting the bottom of the pit cavity, and the periphery of the contact plate is clearance-fitted with the inner wall of the pit cavity.

[0006] Furthermore, the bottom end of the contact plate is provided with a lower extension platform, which is engaged with the swaying groove. A limiting plate with a width greater than the swaying groove is detachably installed at the bottom end of the lower extension platform. The contact plate retains the freedom to sway in the horizontal direction on the mounting frame. An elastic ring is nested between the swaying groove and the lower extension platform. The lower extension platform has a cavity in the middle and a vibration motor is fixedly installed in the cavity. There are at least two vibration motors that are perpendicular to each other.

[0007] Furthermore, the trigger seat includes short walls and long walls that are spliced ​​together to form a square frame. The top outer sides of the short walls and long walls are provided with extrusion ramps for contacting the side support plates. A lower connecting beam is fixedly connected between the short walls. The electromagnetic push rod is connected to the lower connecting beam. The negative pressure hole is located inside the long wall. An air pipe extends outward from the long wall to connect the negative pressure hole to an external negative pressure device. An elastic sealing plate is connected between the side support plates. The sealing plate stretches along with the outward swinging side support plates.

[0008] Furthermore, the central frame has rotating shafts at both ends and is rotatably mounted on the guide frame. The central frame has sliders at both ends and a rotatably mounted synchronous gear, the axis of which is collinear with the rotating shaft. The mounting base includes a movable seat body. A downward-extending rack is fixed to one side of the movable seat body, and a downward-extending limiting slide rail is fixed to the other side. The limiting slide rail is slidably nested on the slider. The rack meshes with the synchronous gear. Two sets of mounting bases are provided and are rotationally symmetrically arranged on both sides of the central frame. One set of mounting bases has a driven shaft at the side end of the movable seat body. The guide frame has a guide groove, and a reversing cylinder is provided on the outer side of the guide frame. The bottom end of the reversing cylinder is hinged to the guide frame, and the top end engages with the guide groove. In a single operation, the reversing cylinder drives the mounting base to perform a lifting and retracting movement within the guide groove and to rotate around the axis of the rotating shaft.

[0009] Furthermore, the guide groove includes an annular reversing groove arranged around the axis of the rotation shaft, and a vertical upward groove connected to the top of the annular reversing groove and a vertical downward groove connected to the bottom of the annular reversing groove. The annular reversing groove is semi-circular, and the vertical upward groove and the vertical downward groove are vertical. The driven shaft located at the junction of the vertical upward groove and the annular reversing groove, and at the junction of the annular reversing groove and the vertical downward groove, causes the mounting seat and the picking seat to be in a retracted state. The driven shaft located at the top of the vertical upward groove and the bottom of the vertical downward groove causes the mounting seat and the picking seat to be in an extended state. The bottom hinge of the reversing cylinder is connected to the lower part of the vertical downward groove and is located on the downward extension line of the vertical downward groove.

[0010] Furthermore, the vertical distance between the top of the retracted material-taking seat and the axis of the central frame is less than the distance from the axis of the central frame to the bottom of the clamping mechanism, and also less than the distance to the bottom of the tool holder.

[0011] Furthermore, the reversing cylinder includes a telescopic cylinder push rod, the top end of which is hinged to a retaining ring, the length of which is greater than or equal to three times the radius of the driven shaft; there is an angle between the line connecting the driven shaft located at the top of the vertical upward groove and the bottom of the vertical downward groove and the bottom of the reversing cylinder and the reversing cylinder.

[0012] Furthermore, the elastic ring is square, and includes an inner ring and an outer ring with a hollowed-out space between them. Several support ribs are arranged along the ring direction between the inner and outer rings. The support ribs are inclined and have at least two inclination angles, and the support ribs with different inclination angles are arranged at intervals. The elastic ring has a margin groove at the corner, and the margin groove is not provided with support ribs.

[0013] Furthermore, the top of the movable seat has a flat bearing surface, and mounting grooves are provided on both sides of the flat bearing surface. The bottom end of the mounting frame extends laterally and is provided with mounting feet. The mounting feet are detachably fixed to the mounting grooves by bolts. The mounting direction of the material taking seat at the top of the movable seat includes two directions: parallel to the length direction of the movable seat and perpendicular to the length direction of the movable seat.

[0014] Furthermore, the punching mechanism includes a pressure bracket fixed on the machine base and a pressure cylinder fixed on the pressure bracket. The lower die is fixed below the pressure bracket, and the pressure cylinder is connected to the upper die and drives the upper die to contact the lower die to punch holes in the film material.

[0015] Furthermore, a blade holder is fixedly installed on the top of the blade holder, and a cutting cylinder is fixed on the blade holder. The cutter is installed on the cutting cylinder and is driven by the cutting cylinder to cut the abrasive.

[0016] Furthermore, the clamping mechanism includes a movable crossbeam, a clamping cylinder, grippers, and an infeed / outfeed cylinder. The movable crossbeam is slidably mounted on the adjusting slide rail on both sides. The clamping cylinder is fixedly mounted on the movable crossbeam. The grippers are mounted on the clamping cylinder and are driven by the clamping cylinder to unfold and close. The infeed / outfeed cylinder is fixedly mounted on the machine base. A synchronization frame is connected to the end of the infeed / outfeed cylinder. The synchronization frame is fixed to the movable crossbeam. The infeed / outfeed cylinder is used to drive the movable crossbeam to move on the adjusting slide rail.

[0017] Furthermore, a low platform with a horizontal height lower than the top surface of the machine is fixed inside the machine. An adjustment slide rail is provided on the low platform, and the feeding mechanism is installed on the adjustment slide rail and is detachably fixed.

[0018] This invention provides a process for manufacturing aluminum-plastic film for lithium batteries, comprising the following steps:

[0019] The first step is to extract the film material from the film roll, guide it through the roller guide mechanism to the punching mechanism, and leave a section between the upper and lower dies on the side near the cutting mechanism. The upper and lower dies of the punching mechanism are tightened to squeeze the film material, punching out two adjacent square cavities.

[0020] Specifically, the pressure cylinder drives the upper mold to descend and squeeze the film material on the lower mold, causing the film material to deform and create a downward-opening cavity.

[0021] The second step is that the clamping mechanism moves towards the punching mechanism in front, clamps the film material and pulls it out backward, and the cutting mechanism cuts the film material with the pits to form a shell.

[0022] Specifically, the inlet / outlet cylinder drives the movable crossbeam to move towards the punching mechanism on the adjusting slide rail, the clamping cylinder drives the gripper to close and clamp the film material, the inlet / outlet cylinder drives the movable crossbeam away from the punching mechanism to pull out the film material, and the cutting cylinder drives the cutter to cooperate with the cutter holder to cut the film material.

[0023] The third step is that the clamping mechanism releases the housing, and the housing falls into the feeding seat of the feeding mechanism. The electromagnetic push rod drives the trigger seat to descend, causing the side support plates on the contact seat to open outward, thereby pressing against the inner wall of the pit to clamp the housing. The trigger seat uses a negative pressure device to evacuate air from the pit, making the clamping of the housing more stable.

[0024] Specifically, when the housing falls onto the contact plate but does not directly snap onto the contact plate, the contact plate vibrates to quickly center and align the cavity of the housing, so that the cavity can snap onto the material picker.

[0025] The fourth step involves the reversing cylinder moving the mounting base and the material handling base on the guide frame, thereby moving the housing held above to the bottom and placing it in the corresponding pressing mold. The pressing mold is then transferred to the next lower station via a conveyor belt, and the lithium battery is encapsulated using an aluminum-plastic film housing.

[0026] Specifically, the cylinder push rod of the reversing cylinder retracts, causing the driven shaft of the movable seat at the top to move downward from the vertical upward groove, causing the mounting seat and the material taking seat to retract towards the central frame, thus avoiding other mechanisms on both sides. Then, the driven shaft moves downward in the annular reversing groove, causing the material taking seat to move the housing to the bottom. Then, it moves downward in the vertical downward groove, causing the housing to move onto the closing mold. Subsequently, the negative pressure in the negative pressure hole is disconnected, the side support plate is released, and the housing falls into the closing mold.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a material pick-and-place mechanism between the cutting mechanism and the clamping mechanism. After the aluminum-plastic film is punched to form a shell, the shell is received by the pick-and-place mechanism. The trigger seat squeezes the surrounding contact seat to deform and unfold the side support plate outward, thereby clamping the shell from the inner wall of the cavity. The negative pressure generated by the trigger seat makes the shell clamped more firmly on the pick-and-place mechanism. Then, the reversing cylinder drives the mounting seat and the pick-and-place mechanism to retract and descend on the guide frame, rotate and release the material. In this way, while ensuring that necessary mechanisms nearby are avoided, the shell is transferred to the conveyor belt below with the cavity facing upward, which is convenient for direct connection to subsequent processing steps. This ensures the continuity of the process and reduces manual transfer operations.

[0028] Furthermore, the present invention preferably uses a reversing cylinder to drive the mounting base and the material taking base to retract and rotate vertically, and sets the guide groove for rotation to be semi-circular. This not only allows the material taking base to rotate only after it descends vertically to avoid interference with the surrounding mechanisms, but also reduces the space occupied laterally, thereby avoiding conflicts with the surrounding mechanisms during installation. This allows the mounting base to accommodate material taking bases of more sizes, and thus accommodate pit cavities of more sizes.

[0029] Furthermore, the present invention preferably uses a contact plate to support the cavity. When the negative pressure generated by the trigger seat is applied, the contact plate supports the bottom wall of the cavity, and gaps are maintained at the four corners of the side support plate, so that the cavity is in a low-pressure state rather than being evacuated. This avoids the cavity from shrinking and collapsing, and also avoids the problem of deformation of the aluminum-plastic film caused by the vacuum suction cup of the prior art, leaving circular pits or circular protrusions.

[0030] Furthermore, the present invention preferably sets the contact plate to vibrate laterally while keeping it centered by the elastic ring. When the housing falls on the contact plate instead of directly fastening onto the contact plate, the edge of the housing cavity is not far from the edge of the contact plate. In this embodiment, the vibration enables the housing cavity to be quickly centered and aligned, so that the cavity can be fastened onto the material pick-up seat, allowing the contact seat to work better. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a lithium battery aluminum-plastic film manufacturing equipment according to the present invention.

[0032] Figure 2 This is a three-dimensional structural diagram of the punching mechanism, cutting mechanism, clamping mechanism and feeding mechanism of the present invention.

[0033] Figure 3 This is a three-dimensional structural diagram of the feeding mechanism of the present invention, which drives the housing to cooperate with the conveyor belt.

[0034] Figure 4 This is an exploded three-dimensional structural diagram of the feeding mechanism of the present invention.

[0035] Figure 5 This is a schematic diagram illustrating the state changes of the material feeding mechanism driving the housing for transfer in this invention.

[0036] Figure 6 This is an exploded three-dimensional structural diagram of the material handling unit of the present invention.

[0037] Figure 7 This is a schematic diagram showing the working state transition of the material handling unit of the present invention.

[0038] Figure 8 This is a three-dimensional structural diagram of the contact plate and mounting bracket of the present invention, as well as a partial schematic diagram of the elastic ring.

[0039] Figure 9 This is a three-dimensional structural schematic diagram of a cooperation method between the reversing cylinder and the mounting base of the present invention, and a partial schematic diagram of the state change of the mounting base driven by the retaining ring.

[0040] In the diagram: A, membrane material; B, membrane roll; C, shell; D, cavity;

[0041] 1. Machine base; 2. Roller guiding mechanism; 3. Punching mechanism; 4. Cutting mechanism; 5. Clamping mechanism; 6. Feeding and unloading mechanism; 7. Pressing die; 8. Conveyor belt;

[0042] 11. Lower open slot; 12. Low platform; 13. Adjustable slide rail; 21. Conveyor roller; 31. Pressure support; 32. Pressure cylinder; 33. Upper die; 34. Lower die; 41. Knife holder; 42. Knife post; 43. Cutting cylinder; 44. Cutting blade; 51. Movable crossbeam; 52. Clamping cylinder; 53. Gripper; 54. Infeed / outfeed cylinder; 55. Synchronizing frame; 61. Center frame; 62. Mounting base; 63. Material handling base; 64. Guide frame; 65. Reversing cylinder;

[0043] 61a. Center relief groove; 61b. Side relief groove; 611. Synchronous gear; 612. Rotating shaft; 613. Slider; 621. Movable seat; 622. Rack; 623. Limiting slide rail; 631. Contact plate; 632. Surrounding contact seat; 633. Mounting bracket; 634. Electromagnetic push rod; 635. Trigger seat; 636. Elastic ring; 641. Vertical upward groove; 642. Ring reversing groove; 643. Vertical downward groove; 651. Cylinder push rod; 652. Snap ring;

[0044] 621a, Flat bearing surface; 621b, Mounting groove; 621c, Driven shaft; 631a, Lower extension platform; 631b, Limiting plate; 631c, Vibration motor; 632a, Side support plate; 632b, Enclosure plate; 633a, Shaking groove; 633b, Mounting foot; 6351, Short wall; 6352, Long wall; 6353, Lower connecting beam; 6354, Extrusion inclined platform; 6355, Negative pressure hole; 636a, Support rib; 636b, Allowance groove. Detailed Implementation

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Examples, such as Figures 1-9As shown: This invention provides a lithium battery aluminum-plastic film manufacturing equipment, including a machine base 1 and a roller guiding mechanism 2, a punching mechanism 3, a cutting mechanism 4, and a clamping mechanism 5 sequentially mounted on the machine base 1 according to the process sequence. A film roll B is nested at the front end of the machine base 1 via a horizontal shaft structure. The roller guiding mechanism 2 has several conveying rollers 21 that draw sheet-shaped film material A from the film roll B and guide the film material A to move via the conveying rollers 21. The punching mechanism 3 punches two adjacent square cavities D into the film material A. The clamping mechanism 5 pulls the film material A out of the punching mechanism 3. The cutting mechanism 4 cuts the film material A with cavities D to form a shell C. A lower open groove 11 is provided on the top surface of the machine base 1. A feeding mechanism 6 is provided in the lower open groove 11 between the cutting mechanism 4 and the clamping mechanism 5. A conveyor belt 8 is provided below the feeding mechanism 6. Several pressing molds 7 are laid on the conveyor belt 8. The feeding mechanism 6 is used to move the housing C into the pressing mold 7 below. The pressing mold 7 has two cavities D corresponding to the two cavities D on the housing C. One pressing mold 7 can be covered by the other pressing mold 7 by an external cylinder structure or manual flipping, thereby driving the housing C to fold and close the two cavities D together. Before the pressing molds 7 are closed, the battery cell is moved into the cavity D by an external robotic arm, so that the housing C can wrap the battery cell after the mold is closed. Then, it enters the external hot press sealing machine under the conveyor belt 8. The existing hot press sealing machine is a pressure device that heats while pressing down. The hot press sealing machine has four heat sealers that heat the aluminum-plastic film at four places on the battery cell, thereby sealing the battery cell.

[0047] The roller guiding mechanism 2 includes several transversely arranged roller structures for guiding the film material A into the punching mechanism 3.

[0048] The punching mechanism 3 includes a pressure bracket 31 fixed on the machine base 1 and a pressure cylinder 32 fixed on the pressure bracket 31. A lower die 34 is fixed on the machine base 1 below the pressure bracket 31. The pressure cylinder 32 is connected to an upper die 33 and drives the upper die 33 to contact the lower die 34 to punch a hole in the film material A. The mutually movable upper die 33 and lower die 34 are used to form a downward-opening cavity D in the film material A. As those skilled in the art know, the heating operation required during this process can be achieved by heating the upper die 33 and lower die 34 according to the prior art.

[0049] The clamping mechanism 5 is slidably mounted on both sides of the lower open slot 11, and spans the lower open slot 11 at both ends. The clamping mechanism 5 includes a movable crossbeam 51, a clamping cylinder 52, a gripper 53, and an inlet / outlet cylinder 54. The movable crossbeam 51 is slidably mounted on the adjusting slide rail 13 on both sides. The clamping cylinder 52 is fixedly mounted on the movable crossbeam 51. The gripper 53 is mounted on the clamping cylinder 52 and is driven by the clamping cylinder 52 to unfold and merge. The inlet / outlet cylinder 54 is fixedly mounted on the machine base 1. The end of the inlet / outlet cylinder 54 is connected to a synchronous frame 55. The synchronous frame 55 is fixed to the movable crossbeam 51. The inlet / outlet cylinder 54 is used to drive the movable crossbeam 51 to move on the adjusting slide rail 13. The inlet / outlet cylinder 54 drives the clamping cylinder 52 to move towards the punching mechanism 3. The gripper 53 clamps the film material A and pulls it out. At the same time, it pulls the film roll B, so that the subsequent part of the film material A that has not yet been punched comes to the bottom of the punching mechanism 3.

[0050] The cutting mechanism 4 includes a knife holder 41 spanning the lower open slot 11 and a cutting blade 44 movably mounted on the knife holder 41. A knife frame 42 extending upward is fixedly mounted on the top of the knife holder 41. A cutting cylinder 43 is fixed on the knife frame 42. The cutting blade 44 is mounted on the cutting cylinder 43 and is driven by the cutting cylinder 43 to cut the abrasive downward.

[0051] Therefore, it can be seen that the bearing of the pressing mold 7 needs to receive the shell C from top to bottom, the cutting blade 44 needs to be supported by the blade holder 41 to cut the film material A, and the blade holder 41 and the movable crossbeam 51 spanning the lower open groove 11 will affect the feeding mechanism 6 to feed the material downward.

[0052] The feeding mechanism 6 consists of three parts, which perform material picking, retraction and avoidance, and rotation and repositioning operations respectively, while minimizing the lateral space occupied. The feeding mechanism 6 includes guide frames 64 located on both sides of the lower open slot 11, a central frame 61 rotatably mounted between the guide frames 64, a mounting seat 62 slidably mounted on the central frame 61, and a material picking seat 63 detachably fixed on the mounting seat 62. Two sets of mounting seats 62 and material picking seats 63 are symmetrically arranged on the central frame 61. A low platform 12 with a horizontal height lower than the top surface of the machine base 1 is fixed inside the machine base 1. An adjustment slide rail 13 is provided on the low platform 12. The guide frames 64 of the feeding mechanism 6 are mounted on the adjustment slide rail 13 and connected by screws. The guide frame 64 is detachably fixed by bolts threaded onto it. The bolts are rotated to abut against the lower platform 12 to fix the position. After sliding on the adjustment slide rail 13, the position can be adjusted to adapt to pits D of different sizes. At the same time, the material pick-up seat 63 is provided with two installation methods on the movable seat 621 to adapt to pits D in different directions. The guide frame 64 is equipped with a reversing cylinder 65 to drive the mounting seat 62 and the material pick-up seat 63 to extend, retract, move and rotate on the guide frame 64. The extension and retraction movement is used to avoid other surrounding mechanisms, such as the knife holder 41 and the movable crossbeam 51. The rotation is used to exchange the positions of the two sets of mounting seats 62 and material pick-up seats 63.

[0053] For the material handling section, the mounting base 62 includes a movable base 621, and the material handling base 63 includes a mounting frame 633, a contact seat 632, and a trigger seat 635 movably mounted in the contact seat 632 via an electromagnetic push rod 634. The mounting frame 633 is detachably mounted on the movable base 621, and the trigger seat 635 is slidably nested on the outside of the mounting frame 633. The electromagnetic push rod 634 is fixed inside the mounting frame 633 and connected to the trigger seat 635. The contact seat 632 is fixed outside the mounting frame 633 and located outside the trigger seat 635. The contact seat 632 is cuboid in shape and has elastic side support plates 632a on all four sides of its top edge. The trigger seat 635 has outwardly protruding extrusion ramps 6354 around its top edge. 2a has a structure that is thin at the top and thick at the bottom. The side support plate 632a is squeezed by the trigger seat 635 and swings outward to the outside of the contact seat 632 and contacts the cavity D, thereby supporting the cavity D inside the cavity D and clamping and transporting the shell C. However, the transport speed is relatively fast. At the same time, in order to prevent the shell C from falling off during the transport process, the contact seat 632 is provided with several negative pressure holes 6355 with the openings located at the top. Several negative pressure holes 6355 converge into one inlet in the trigger seat 635. The negative pressure holes 6355 of the trigger seat 635 are connected to an external negative pressure device through an air pipe at the inlet, such as a vacuum pump. The negative pressure holes 6355 pump air in the cavity D, thereby assisting the side support plate 632a in clamping the shell C.

[0054] Furthermore, the material handling seat 63 also includes a contact plate 631. The top of the mounting bracket 633 is provided with a swaying groove 633a. The contact plate 631 is engaged within the swaying groove 633a. The top of the contact plate 631 has a flat surface for contacting the bottom of the pit D. The periphery of the contact plate 631 is clearance-fitted with the inner wall of the pit D. The top of the contact plate 631 is higher than the side support piece 632a, which is located inside the contact plate 631 and swings outwards from the inside of the contact plate 631. The contact plate 631 then contacts the bottom of the pit D and supports the bottom of the pit D. The side supports 632a and 632b are connected to each other. The side supports 632a are stretched along with the side supports 632a as they swing outward. At this time, the side supports 632a abut against the side wall of the pit D, and the side supports 632b cannot contact the side wall or the bottom. The side supports 632a are used to reduce the gap between them, so that when the negative pressure hole 6355 is used to evacuate air from the pit D, the pit D will not collapse and deform due to lack of air. Instead, the inside of the pit D will remain in a low-pressure state.

[0055] Furthermore, the bottom end of the contact plate 631 is provided with a lower extension platform 631a, which is gapped and engaged within the swaying groove 633a. A limiting plate 631b with a width greater than that of the swaying groove 633a is detachably installed at the bottom end of the lower extension platform 631a, thereby preventing the contact plate 631 from moving up and down within the swaying groove 633a. The contact plate 631 retains the freedom to sway horizontally on the mounting bracket 633. At the same time, an elastic ring 636 is nested between the swaying groove 633a and the lower extension platform 631a. The elastic ring 636 is square. The elastic ring 636 provides the contact plate 631 with the elastic force to keep it in the center, while allowing the contact plate 631 to have space to move in the horizontal direction; at the same time, the lower extension platform 631a has a cavity in the middle and a vibration motor 631c is fixedly installed in the cavity. There are at least two vibration motors 631c and they are perpendicular to each other. The vibration motors 631c in the prior art can be linear motors or eccentric rotor motors. Those skilled in the art can choose according to actual needs. The vibration motors 631c are electrically connected to external control equipment.

[0056] Since the housing C is picked up and placed by the gripper 53 during the removal process, when the gripper 53 is holding the housing C, the other end of the housing C has already lost support due to the cutting and droops. When the housing C is put down, the housing C may tilt. When the housing C falls on the contact plate 631, if it does not directly fasten to the contact plate 631, the edge of the cavity D of the housing C is not far from the edge of the contact plate 631. In this embodiment, vibration is used to make the cavity D of the housing C quickly centered and aligned, so that the cavity D can fasten to the material picking seat 63, and the surrounding contact seat 632 can work better.

[0057] In this embodiment, the trigger seat 635 includes short walls 6351 and long walls 6352 that are spliced ​​together to form a square frame. The outer tops of the short walls 6351 and long walls 6352 are provided with pressing ramps 6354 for contacting the side support plates 632a. A lower connecting beam 6353 is fixedly connected between the short walls 6351. During installation, the short walls 6351 are inserted from below and above the mounting bracket 633, and then the long walls 6352 are installed on both sides of the short walls 6351 to form a square frame. The electromagnetic push rod 634 is connected to the lower connecting beam 6353. The negative pressure hole 6355 is set inside the long wall 6352. The long wall 6352 extends outward and is provided with an air pipe for connecting the negative pressure hole 6355 to an external negative pressure device. In this embodiment, the bottom end of the contact seat 632 is also elastic. The bottom end of the contact seat 632 is opened and spans the trigger seat 635 and is sleeved on the outside of the trigger seat 635. At the same time, the bottom end of the contact seat 632 is locked and fixed to the mounting bracket 633 by bolts.

[0058] In this embodiment, the top of the movable seat 621 has a flat bearing surface 621a, and mounting grooves 621b are provided on both sides of the flat bearing surface 621a. The bottom end of the mounting bracket 633 is provided with mounting feet 633b. The mounting feet 633b are detachably fixed to the mounting grooves 621b by bolts. The mounting direction of the material taking seat 63 at the top of the movable seat 621 includes two directions: parallel to the length direction of the movable seat 621 and perpendicular to the length direction of the movable seat 621. Since the aluminum-plastic film is punched, depending on the size of the aluminum-plastic film, there will be two situations: the length direction of the cavity D is perpendicular to the moving direction of the film material A and parallel to the folding direction of the shell C. The folds of the shell C are on the short side and the long side, respectively. Therefore, the material taking seat 63 that is compatible with the cavity D is also provided with two mounting methods on the movable seat 621.

[0059] In this embodiment, the elastic ring 636 includes an inner ring and an outer ring, with a hollowed-out space between them. A plurality of support ribs 636a are arranged along the ring direction between the inner and outer rings. The support ribs 636a are inclined and have at least two inclination angles. The support ribs 636a with different inclination angles are arranged at intervals. The elastic ring 636 has a margin groove 636b at its corner. The margin groove 636b is not provided with support ribs 636a. Thus, the staggered support ribs 636a provide the contact plate 631 with the elastic force to keep it in the center, while allowing the contact plate 631 to have space to move in the horizontal direction.

[0060] For the retraction avoidance and rotational repositioning parts, the center frame 61 has rotating shafts 612 at both ends and is rotatably mounted on the guide frame 64. The center frame 61 has sliders 613 at both ends, and a synchronous gear 611 is rotatably mounted on the center frame 61. The axis of the synchronous gear 611 is collinear with the rotating shaft 612. The center frame 61 has inwardly extending side relief grooves 61b at both ends for shaft nesting installation of the synchronous gear 611. The synchronous gear 611 is installed by passing through the side relief grooves 61b into the center of the center frame 61. The mounting base 62 includes a movable seat 621, one side of which is fixed with a downward... The extended rack 622 has a downwardly extending limiting slide rail 623 fixed on the other side. The limiting slide rail 623 is slidably nested on the slider 613. The rack 622 meshes with the synchronous gear 611. The mounting base 62 has two sets and is rotationally symmetrically arranged on both sides of the central frame 61. When the mounting base 62 on one side moves towards the central frame 61, the rack 622 drives the synchronous gear 611 to rotate, thereby causing the rack 622 on the other side to also move towards the central frame 61. The same applies to the opposite side. Several relief grooves 61a are provided on both sides of the movable base to allow the rack 622 and the limiting slide rail 623 to move away from each other.

[0061] To address this, a driven shaft 621c is provided on the side end of the movable seat 621 of a set of mounting seats 62. To avoid interference, the mounting seats 62 and the material handling seat 63 need to first descend vertically and then rotate to change position. However, if the mounting seats 62 and the material handling seat 63 are directly driven to retract during rotation, interference problems may easily occur when adapting to mounting seats 62 of different sizes. Therefore, a linear motion mechanism is needed to guide the movement of the mounting seats 62 from the outside. Thus, a guide groove is provided on the guide frame 64. A reversing cylinder 65 is provided on the outer side of the guide frame 64. The bottom end of the reversing cylinder 65 is hinged to the guide frame 64. The reversing cylinder 65 includes a cylinder push rod 651 for extension and retraction. The top end of the cylinder push rod 651 of the reversing cylinder 65 is engaged with the guide groove. In a single operation, the reversing cylinder 65 drives the mounting seat 62 to move in a lifting and retracting manner in the guide groove and rotate around the axis of the rotating shaft 612. A single movement of the reversing cylinder 65 can drive the mounting seat 62 and the material picking seat 63 to extend, retract and change position once.

[0062] Specifically, the guide groove includes an annular reversing groove 642 arranged around the axis of the rotating shaft 612, and a vertical upward groove 641 connected to the top of the annular reversing groove 642 and a vertical downward groove 643 connected to the bottom of the annular reversing groove 642. The vertical upward groove 641 and the vertical downward groove 643 are vertical. The driven shaft 621c located at the junction of the vertical upward groove 641 and the annular reversing groove 642, and at the junction of the annular reversing groove 642 and the vertical downward groove 643, keeps the mounting seat 62 and the picking seat 63 in a retracted state. The driven shaft 621c located at the top of the vertical upward groove 641 and the bottom of the vertical downward groove 643 keeps the mounting seat 62 and the picking seat 63 in an extended state. The bottom hinge of the reversing cylinder 65 is connected to the lower part of the vertical downward groove 643 and is located on the downward extension line of the vertical downward groove 643.

[0063] It should be noted that the vertical distance between the top of the retractable material take-up seat 63 and the axis of the central frame 61 is less than the distance from the axis of the central frame 61 to the bottom of the clamping mechanism 5, and also less than the distance to the bottom of the tool holder 41.

[0064] It should be noted that the annular reversing groove 642 is semi-circular, which allows the width of the guide frame 64 to be reduced, thus reducing the lateral space occupied. The reversing cylinder 65 extends and retracts, driving the mounting base 62 to reciprocate within the annular reversing groove 642, thereby performing vertical repositioning.

[0065] Furthermore, a retaining ring 652 is hinged to the top of the cylinder push rod 651. The length of the retaining ring 652 is greater than or equal to three times the radius of the driven shaft 621c. The direction of movement of the reversing cylinder 65 is inclined from the bottom end towards the semi-circular annular reversing groove 642. The line connecting the driven shaft 621c, located at the top of the vertical groove 641 and the bottom of the vertical groove 643, and the bottom end of the reversing cylinder 65 forms an acute angle with the reversing cylinder 65. That is, there is an acute angle between the vertical line and the axis of the reversing cylinder 65. Thus, the safety of the cylinder can be improved. After the driven shaft 621c of the mounting base 62 moves to the root of the vertical upward groove 641 and the vertical downward groove 643, it is tilted and driven by the retaining ring 652 to enter the ring reversing groove 642. This avoids the driven shaft 621c getting stuck at the root of the vertical upward groove 641 and the vertical downward groove 643 and being unable to enter the ring reversing groove 642. At the same time, it ensures that the mounting base 62 can retract to a sufficient position without the need to set an inclined transition surface at the root of the vertical upward groove 641 and the vertical downward groove 643, thus avoiding the transition surface affecting the retraction range of the mounting base 62.

[0066] In summary, in specific implementation, this embodiment provides a lithium battery aluminum-plastic film manufacturing process, including the following steps:

[0067] The first step is to extract the film material A from the film roll B, pass it around the roller guide mechanism 2 to the punching mechanism 3, and leave a section between the upper die 33 and the lower die 34 on the side near the cutting mechanism 4. The upper die 33 and the lower die 34 of the punching mechanism 3 are tightened to squeeze the film material A, punching out two adjacent square cavities D for the film material A.

[0068] Specifically, the pressure cylinder 32 drives the upper mold 33 to descend and squeeze the film material A on the lower mold 34, causing the film material A to deform and create a downward-opening cavity D.

[0069] In the second step, the clamping mechanism 5 moves forward towards the punching mechanism 3, clamps the film material A and pulls it backward, and the cutting mechanism 4 cuts the film material A with the pit cavity D to form the shell C.

[0070] Specifically, the inlet / outlet cylinder 54 drives the movable crossbeam 51 to move towards the punching mechanism 3 on the adjusting slide rail 13, the clamping cylinder 52 drives the gripper 53 to close and clamp the film material A, the inlet / outlet cylinder 54 drives the movable crossbeam 51 away from the punching mechanism 3 to pull out the film material A, and the cutting cylinder 43 drives the cutter 44 to cooperate with the cutter holder 41 to cut the film material A.

[0071] Third, the clamping mechanism 5 releases the housing C, and the housing C falls onto the feeding seat 63 of the feeding mechanism 6. The electromagnetic push rod 634 drives the trigger seat 635 to descend, causing the side support plate 632a on the contact seat 632 to open outward, thereby pressing against the inner wall of the pit D to clamp the housing C. The trigger seat 635 uses a negative pressure device to evacuate air from the pit D, making the clamping of the housing C more stable.

[0072] Specifically, when the housing C falls onto the contact plate 631 but does not directly snap onto the contact plate 631, the contact plate 631 vibrates to quickly center and align the cavity D of the housing C, so that the cavity D can snap onto the material picker 63.

[0073] In the fourth step, the reversing cylinder 65 drives the mounting base 62 and the material picking base 63 to move on the guide frame 64, thereby moving the housing C held above to the bottom and placing it in the corresponding pressing mold 7. The pressing mold 7 is then driven to the next lower station by the conveyor belt 8, and the lithium battery is encapsulated using the aluminum-plastic film housing C.

[0074] Specifically, the cylinder push rod 651 of the reversing cylinder 65 retracts, causing the driven shaft 621c of the movable seat 621 at the top to move downward from the vertical groove 641, causing the mounting seat 62 and the material take-up seat 63 to retract towards the central frame 61, thus avoiding other mechanisms on both sides. Then, the driven shaft 621c moves downward within the annular reversing groove 642, causing the material take-up seat 63 to move the housing C to the lower position. Then, it moves downward within the vertical groove 643, causing the housing C to move onto the closing mold 7. Subsequently, the negative pressure in the negative pressure hole 6355 is disconnected, and the side support plate 632a is released, allowing the housing C to fall into the closing mold 7.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A lithium battery aluminum-plastic film manufacturing equipment, characterized in that: It includes a machine base and a roller guiding mechanism, a punching mechanism, a cutting mechanism and a clamping mechanism sequentially mounted on the machine base. A film roll is arranged on the machine base and the film material is guided to move by the roller guiding mechanism. The punching mechanism includes an upper die and a lower die that move with each other to form a downward-opening cavity in the film material. The machine base has an open groove on the top surface. The clamping mechanism is slidably mounted on both sides of the open groove. The cutting mechanism includes a knife holder that spans the open groove and a cutting knife that is movably mounted on the knife holder, used to cut the film material with pits into a shell. A feeding mechanism is provided in the lower open slot between the cutting mechanism and the clamping mechanism. A conveyor belt is provided below the feeding mechanism, and several pressing molds are laid on the conveyor belt. The feeding mechanism is used to move the shell into the pressing mold below. The feeding mechanism includes guide frames located on both sides of the lower open slot, a central frame rotatably mounted between the guide frames, a mounting seat slidably mounted on the central frame, and a feeding seat detachably fixed on the mounting seat. The guide frame is equipped with a reversing cylinder that drives the mounting seat and the feeding seat to extend, retract, move, and rotate on the guide frame. The feeding seat includes a surrounding contact seat and a trigger seat movably mounted in the surrounding contact seat via an electromagnetic push rod. The top edge of the surrounding contact seat is provided with an elastic side support plate. The side support plate is squeezed by the trigger seat and swings outward from the surrounding contact seat and contacts the pit cavity. The trigger seat is connected to a negative pressure device. The central frame has rotating shafts at both ends and is rotatably mounted on the guide frame. The central frame has sliders at both ends and is rotatably mounted with synchronous gears. The axis of the synchronous gears is collinear with the rotating shafts. The mounting base includes a movable base body, one side of which is fixed with a downwardly extending rack and the other side with a downwardly extending limiting slide rail. The limiting slide rail is slidably nested on the slider. The rack meshes with a synchronous gear. The mounting base has two sets of racks that are rotationally symmetrically arranged on both sides of the central frame. A set of the mounting bases has a driven shaft on the side of the movable seat body, a guide groove on the guide frame, and a reversing cylinder on the outside of the guide frame. The bottom end of the reversing cylinder is hinged to the guide frame and the top end is engaged with the guide groove. In a single operation, the reversing cylinder drives the mounting base to move in a lifting and retracting manner in the guide groove and to rotate around the axis of the rotating shaft. The guide groove includes an annular reversing groove arranged around the axis of the rotation shaft, and a vertical upward groove connected to the top of the annular reversing groove and a vertical downward groove connected to the bottom of the annular reversing groove. The annular reversing groove is semi-circular, and the vertical upward groove and the vertical downward groove are vertical. The driven shaft located at the junction of the vertical upward groove and the annular reversing groove, and at the junction of the annular reversing groove and the vertical downward groove, causes the mounting base and the material picking base to be in a retracted state; the driven shaft located at the top of the vertical upward groove and the bottom of the vertical downward groove causes the mounting base and the material picking base to be in an extended state. The bottom hinge of the reversing cylinder is connected below the vertical downward groove and is located on the downward extension line of the vertical downward groove.

2. The lithium battery aluminum-plastic film manufacturing equipment according to claim 1, characterized in that: The material handling seat also includes a mounting frame, the trigger seat is slidably nested on the outside of the mounting frame, the electromagnetic push rod is fixed inside the mounting frame and connected to the trigger seat, and the surrounding contact seat is fixed on the outside of the mounting frame and located outside the trigger seat; The contact base is provided with several negative pressure holes with the openings located at the top. The negative pressure holes are connected to external negative pressure equipment and are used to extract air from the pit cavity. The material handling seat also includes a contact plate. The top of the mounting frame is provided with a swaying groove. The contact plate is snapped into the swaying groove. The top of the contact plate has a flat surface for contacting the bottom of the pit cavity. The periphery of the contact plate is clearance-fitted with the inner wall of the pit cavity.

3. The lithium battery aluminum-plastic film manufacturing equipment according to claim 2, characterized in that: The bottom end of the contact plate is provided with a lower extension platform, which is gapped and engaged in the swaying groove. A limiting plate with a width greater than the swaying groove is detachably installed at the bottom end of the lower extension platform. The contact plate retains the freedom to sway in the horizontal direction on the mounting frame. An elastic ring is nested between the swaying groove and the lower extension platform; The lower extension platform has a cavity in the middle and a vibration motor is fixedly installed in the cavity. There are at least two vibration motors that are perpendicular to each other.

4. The lithium battery aluminum-plastic film manufacturing equipment according to claim 2, characterized in that: The trigger seat includes short walls and long walls that are spliced ​​together to form a square frame. The top outer side of the short walls and long walls is provided with a compression ramp for contacting the side support plate. A lower connecting beam is fixedly connected between the short walls. The electromagnetic push rod is connected to the lower connecting beam. The negative pressure hole is located inside the long wall. The long wall extends outward and is provided with an air pipe for connecting the negative pressure hole to an external negative pressure device. The side support plates are connected by elastic sealing plates, which stretch as the side support plates swing outward.

5. The lithium battery aluminum-plastic film manufacturing equipment according to claim 1, characterized in that: The vertical distance between the top of the retracted material-taking seat and the axis of the central frame is less than the distance from the axis of the central frame to the bottom of the clamping mechanism, and also less than the distance to the bottom of the tool holder.

6. The lithium battery aluminum-plastic film manufacturing equipment according to claim 1, characterized in that: The reversing cylinder includes a telescopic cylinder push rod, and a retaining ring is hinged to the top of the cylinder push rod. The length of the retaining ring is greater than or equal to three times the radius of the driven shaft. There is an angle between the line connecting the driven shaft located at the top of the vertical upward groove and the bottom of the vertical downward groove and the bottom of the reversing cylinder and the reversing cylinder.

7. The lithium battery aluminum-plastic film manufacturing equipment according to claim 3, characterized in that: The elastic ring is square, and includes an inner ring and an outer ring with a hollowed-out space between them. Several support ribs are arranged along the ring direction between the inner and outer rings. The support ribs are inclined and have at least two inclination angles. The support ribs with different inclination angles are arranged at intervals. The elastic ring has a margin groove at its corners, and the margin groove is not provided with support ribs.

8. A process for manufacturing aluminum-plastic film for lithium batteries, characterized in that: The lithium battery aluminum-plastic film manufacturing equipment according to any one of claims 1-7 includes the following steps: The first step is to extract the film material from the film roll, guide it through the roller guide mechanism to the punching mechanism, and leave a section between the upper and lower dies on the side near the cutting mechanism. The upper and lower dies of the punching mechanism are tightened to squeeze the film material, punching out two adjacent square cavities. The second step is that the clamping mechanism moves towards the punching mechanism in front, clamps the film material and pulls it out backward, and the cutting mechanism cuts the film material with the pits to form a shell. The third step is that the clamping mechanism releases the housing, and the housing falls into the feeding seat of the feeding mechanism. The electromagnetic push rod drives the trigger seat to descend, causing the side support plates on the contact seat to open outward, thereby pressing against the inner wall of the pit to clamp the housing. The trigger seat uses a negative pressure device to evacuate air from the pit, making the clamping of the housing more stable. The fourth step involves the reversing cylinder moving the mounting base and the material handling base on the guide frame, thereby shifting the housing held above to the lower position and placing it in the corresponding pressing mold. The pressing mold is then conveyed to the next lower station via a conveyor belt, where the lithium battery is encapsulated using an aluminum-plastic film housing.

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