Buffering ACF (anisotropic conductive film) attaching device and method thereof
By designing a vertical hydraulic cylinder-driven slide and a crimping mechanism with a pressing rod with a movable wheel in the ACF attachment equipment, combined with the floating disc and the dental disc structure, the problems of uneven pressure and easy damage to the adhesive film during the ACF attachment process in the prior art are solved, and efficient and uniform adhesion effect and improvement of production efficiency are achieved.
Patent Information
- Application Number
- CN202411848147.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
It is difficult to achieve uniform pressure during the adhesion process of existing ACF adhesion equipment, which can easily lead to damage to the ACF adhesive film or frequent replacement of buffer colloids, affecting production efficiency.
A crimping mechanism including a slide seat driven by a vertical hydraulic cylinder and a pressing rod with a movable wheel is designed to maintain an angle elasticity with the vertical direction through a pressure torsion spring, realize rolling attachment, and stabilize the down pressure through the floating disc and the tooth disc structure to reduce pressure fluctuations.
The contact range is reduced through rolling adhesion technology, and the adhesion effect is improved. Through the elastically pressed press rod and the structure that stabilizes the down pressure, the direct pressing and damage of the ACF adhesive film is avoided, the dependence on buffer colloids is reduced, and the production efficiency is improved.
Smart Images
Figure CN119637618A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of ACF attaching equipment, in particular to a bufferable ACF attaching device and a method thereof. Background Art
[0002] ACF is a key material used to connect LCD panels, touch screens, keyboards, chips, and other electronic components with conductive contacts. ACF pre-mounting machines are automated and efficient, which can improve production efficiency and bonding quality. The main function of the ACF pre-mounting machine is to automatically apply ACF, anisotropic conductive film adhesive, to the component to be connected and bond it to another component to achieve electrical connection.
[0003] The ACF adhesive film tape includes an adhesive film and a cover tape, and the ACF pre-lamination machine usually includes a feeding mechanism, a crimping mechanism, and a recycling mechanism. The feeding mechanism is used to feed the ACF adhesive film tape into the machine and position the ACF adhesive film tape on the component to be adhered. The crimping mechanism ensures that the adhesive film of the ACF adhesive film tape is bonded to the component by applying appropriate pressure, but the crimping mechanism in the prior art usually uses a whole-piece structure to press the ACF adhesive film, which results in the need to set a larger pressure value to ensure uniform pressing everywhere, or use a soft glue structure for buffering, which easily causes the ACF adhesive film to be subjected to excessive force and easily damaged, or the buffering colloid needs to be replaced frequently, affecting production.
[0004] Therefore, a new type of buffered ACF attaching device and method is needed to solve the buffering problem in the above-mentioned AFC attaching process. Summary of the invention
[0005] The object of the present invention is to provide a buffering ACF attaching device and method thereof to solve the buffering problem in the AFC attaching process.
[0006] To achieve the above object, the present invention provides the following technical solutions: A buffered ACF attaching device and method thereof include a frame, a crimping base is arranged in the center of the frame, a crimping mechanism is arranged above the crimping base, the crimping mechanism includes a slide driven by a vertical hydraulic cylinder, a pressure rod with a movable wheel at the bottom is arranged at the bottom of the slide for rotation along a vertical plane, the pressure rod is elastically arranged to maintain an angle with the vertical direction through a pressure torsion spring, a feeding mechanism and a winding mechanism are arranged on both sides of the crimping mechanism, and an ACF adhesive film tape is passed between the crimping base and the pressure rod of the crimping mechanism through a guide mechanism.
[0007] As a further solution of the present invention: the bottom of the slide is connected to a connecting frame, a mounting shaft is fixed on the connecting frame, a pressure rod is rotatably connected to the mounting shaft, a resistance plate is arranged on the mounting shaft, a pressure torsion spring is sleeved on the mounting shaft between the pressure rod and the resistance plate, two ends of the pressure torsion spring are respectively fixed on the pressure rod and the resistance plate, the pressure torsion spring acts on the pressure rod to make the pressure rod maintain a tendency to move toward a vertical downward state, and a protruding resistance block is provided on the inner wall of the connecting frame to limit the pressure rod to maintain a minimum angle of 10° with the vertical direction.
[0008] As a further solution of the present invention: a stepped surface structure is provided on the mounting shaft, which together with the connecting frame performs axial clamping and limiting of the pressure rod.
[0009] As a further solution of the present invention: the resistance plate includes a pressure plate and a floating plate. The pressure plate is rotatably set on the installation shaft and is connected to one end of the pressure torsion spring for circumferential transmission. The other side is circumferentially meshed with a floating plate that slides along the installation shaft through a toothed plate structure. A compression spring is arranged between the floating plate and the inner wall of the connecting frame and is sleeved on the outer side of the installation shaft. The compression spring acts on the floating plate to mesh the floating plate with the toothed plate structure of the pressure plate. A gear ring structure is recessed on the circumferential surface of the floating plate, and is connected to a drive motor on a connecting frame on one side through a drive shaft transmission.
[0010] As a further solution of the present invention: the influence coefficient of the pressure change under the pressure rod caused by the torsion of the pressure torsion spring angle is greater than the influence coefficient of the moment length change on the pressure change under the pressure rod after the pressure rod angle changes.
[0011] As a further solution of the present invention: there are elastically protruding movable teeth in the floating plate, and there are corresponding ratchet teeth on the mounting shaft. The floating plate is connected to the mounting shaft for circumferential one-way limited rotation, and the limited direction is consistent with the rotation direction when the pressure rod is pressed down.
[0012] As a further solution of the present invention: the drive shaft and the drive motor are torque-connected, and the transmission is disconnected when the circumferential transmission torque is greater than the meshing torque between the floating plate and the pressure plate.
[0013] As a further solution of the present invention: the movable wheel position at the bottom of the pressure rod is made of rubber tendon.
[0014] A method for ACF attachment using the above-mentioned bufferable ACF attachment device is characterized by comprising the following steps: S1: The ACF adhesive film strip is mounted on the feeding mechanism, and the end of the strip passes through the guide mechanism once and is connected to the winding mechanism; S2: Adjust the position of the ACF adhesive film strip to align with the crimping mechanism and the attachment station stroke; S3: Place the component to be bonded on the crimping base for positioning, start the equipment, and the hydraulic cylinder drives the pressing rod to press down to roll and attach the ACF adhesive film and then reset it; S4: The driving motor starts to drive the abutment plate and the pressure rod to rotate to reset the preset pressure of the initial angle. Beneficial Effects
[0015] 1. The bottom of the slide of the present invention is provided with a pressure rod with a movable wheel at the bottom, which is rotatable along the vertical plane. The pressure rod is elastically arranged to maintain an angle with the vertical direction through a pressure torsion spring. The traditional surface pressure is changed to line pressure by rolling the pressure rod, and the contact effect is improved by reducing the contact range to ensure the adhesion effect. The pressure rod elastically pressed by the torsion spring can also play a buffering role to prevent direct pressing of the ACF adhesive film and the component to be adhered to avoid damage. Moreover, as the pressure rod is twisted, the increase in the force of the torsion spring can also compensate for the change in the downward force caused by the change in the force arm, thereby reducing pressure fluctuations.
[0016] 2. The resistance plate of the present invention includes a pressure plate and a floating plate. The pressure plate is rotatably set on the installation shaft and is connected to one end of the pressure torsion spring for circumferential transmission. The other side is circumferentially meshed with a floating plate that slides along the installation shaft through a sprocket structure. A pressure spring is sleeved on the outer side of the installation shaft between the floating plate and the inner wall of the connecting frame, which acts on the floating plate to mesh the floating plate with the sprocket structure of the pressure plate. Through the clutch setting of the resistance plate structure, which is a fixed point at one end of the pressure torsion spring, the torsion of the pressure torsion spring that is the original source of the downward pressure of the pressure rod is replaced by the meshing force of the pressure plate and the floating plate, so as to provide a maximum stable source of downward pressure, and the torsion of the pressure torsion spring is used to buffer and provide initial downward pressure, alleviate the change curve of the downward pressure caused by the switching of the clutch state of the pressure plate and the floating plate, and reduce pressure fluctuations.
[0017] 3. The drive shaft and the drive motor of the present invention are torque-connected, and the transmission is disconnected when the circumferential transmission torque is greater than the meshing torque of the floating plate and the pressure plate. The torque connection of the drive shaft and the drive motor that drives the floating plate, the pressure plate and the pressure rod to reset the initial angle is achieved, and when the angles of the floating plate, the pressure plate and the pressure rod are in place, the blocked floating plate and the pressure plate are disengaged from the meshing state and rotate relative to each other, so that the transmission disconnection is replaced by the active transmission disconnection of the drive source, thereby reducing the wear of the pressure plate structure caused by the disengagement of the floating plate and the pressure plate, and further reducing the change in the meshing force caused by the wear of the sprocket structure, that is, the maximum downward force of the pressure rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of .
[0020] Figure 3 It is a schematic diagram of the structure of the crimping mechanism of the present invention.
[0021] Figure 4 It is a schematic diagram of the internal structure of the crimping mechanism of the present invention.
[0022] Figure 5 It is an exploded schematic diagram of the crimping mechanism structure of the present invention.
[0023] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at B.
[0024] Figure 7 It is a schematic diagram of the transmission of the mounting shaft and the floating plate of the present invention.
[0025] Figure 8 It is a schematic diagram of the installation shaft structure of the present invention.
[0026] Figure 1-8 In: 1. Frame; 2. Feeding mechanism; 3. Guide mechanism; 4. Winding mechanism; 5. Crimping base; 6. Crimping mechanism; 61. Hydraulic cylinder; 62. Slide; 63. Connecting frame; 64. Mounting shaft; 641. Ratchet; 65. Pressure rod; 66. Pressure torsion spring; 67. Stop block; 68. Stop plate; 681. Pressure plate; 682. Floating plate; 683. Compression spring; 684. Movable teeth; 69. Driving shaft; 610. Driving motor. DETAILED DESCRIPTION
[0027] The following will be combined with the accompanying drawings in the present invention Figure 1-Figure 8 , clearly and completely describe the specific technical solutions of the present invention; See also Figure 1-Figure 8 , Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure at A; Figure 3 It is a schematic diagram of the structure of the crimping mechanism of the present invention; Figure 4 It is a schematic diagram of the internal structure of the crimping mechanism of the present invention; Figure 5 It is an exploded schematic diagram of the crimping mechanism structure of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure at B; Figure 7 It is a schematic diagram of the transmission of the mounting shaft and the floating plate of the present invention; Figure 8 It is a schematic diagram of the installation shaft structure of the present invention.
[0028] The present embodiment provides a bufferable ACF attaching device, comprising a frame, a crimping base is arranged in the center of the frame, a crimping mechanism is arranged above the crimping base, the crimping mechanism comprises a slide driven by a vertical hydraulic cylinder, a pressure rod with a movable wheel at the bottom is arranged at the bottom of the slide to rotate along a vertical plane, the pressure rod is elastically arranged to maintain an angle with the vertical direction through a pressure torsion spring, a feeding mechanism and a winding mechanism are arranged on both sides of the crimping mechanism, and the ACF adhesive film tape is passed through between the crimping base and the pressure rod of the crimping mechanism through a guide mechanism; The rolling pressure rod changes the traditional surface pressure into line pressure, and the contact effect is improved by reducing the contact range to ensure the adhesion effect. The elastic pressing pressure rod through the torsion spring can also play a buffering role to prevent direct pressing of the ACF bonding film and the components to be adhered to avoid damage. Moreover, as the pressure rod twists, the increase in the torsion spring force can also compensate for the change in downward force caused by the change in the force arm, reducing pressure fluctuations.
[0029] Among them, the bottom of the slide is connected to a connecting frame, a mounting shaft is fixed on the connecting frame, a pressure rod is rotatably connected to the mounting shaft, a resistance plate is arranged on the mounting shaft, a pressure torsion spring is sleeved on the mounting shaft between the pressure rod and the resistance plate, and the two ends of the pressure torsion spring are respectively fixed on the pressure rod and the resistance plate. The pressure torsion spring acts on the pressure rod to make the pressure rod maintain the tendency of moving in a vertical downward state, and a protruding resistance block is provided on the inner wall of the connecting frame to limit the pressure rod to maintain a minimum angle of 10° with the vertical direction, so as to guide the angular torsion of the pressure rod.
[0030] Specifically, a stepped surface structure is provided on the installation shaft, which together with the connecting frame performs axial clamping and limiting of the pressure rod, thereby preventing the pressure rod from being displaced along the axial direction of the installation shaft, thereby ensuring the accuracy of the rolling direction.
[0031] Specifically, the pressure plate includes a pressure plate and a floating plate. The pressure plate is rotatably arranged on the mounting shaft and connected to one end of the pressure torsion spring for circumferential transmission. The other side is circumferentially meshed with a floating plate that slides along the mounting shaft through a toothed plate structure. A pressure spring is provided between the floating plate and the inner wall of the connecting frame and is sleeved on the outer side of the mounting shaft to act on the floating plate so that the floating plate is meshed with the toothed plate structure of the pressure plate. A gear ring structure is concavely arranged on the circumferential surface of the floating plate, and is connected to a driving motor on one side of the connecting frame through a driving shaft. Through the clutch setting of the fixed point at one end of the pressure torsion spring, i.e. the resistance plate structure, the torsion of the pressure torsion spring, which is the original source of the pressure rod's downward pressure, is replaced by the meshing force of the pressure plate and the floating plate, so as to provide a maximum stable source of downward pressure. The torsion of the pressure torsion spring is used to buffer and provide initial downward pressure, alleviate the change curve of the downward pressure caused by the switching of the clutch state of the pressure plate and the floating plate, and reduce pressure fluctuations.
[0032] Furthermore, the influence coefficient of the pressure change under the pressure rod caused by the torsion of the pressure torsion spring angle is greater than the influence coefficient of the moment length change on the pressure change under the pressure rod after the pressure rod angle changes; To ensure that the downward pressure gradually increases during the twisting process of the pressure rod angle and reaches the critical state to repeatedly trigger the disconnection of the engagement state between the floating plate and the pressure plate, so that the pressure value always fluctuates in a small range near the set value.
[0033] Furthermore, there are elastically protruding movable teeth in the floating plate, and corresponding ratchet teeth are provided on the mounting shaft. The floating plate is connected to the mounting shaft for circumferential one-way limited rotation, and the limited direction is consistent with the rotation direction when the pressure rod is pressed down; The floating plate is subjected to circumferential force through a one-way limiting ratchet structure, which prevents the drive shaft and the drive motor from bearing the circumferential torsional force exerted on the floating plate, thereby ensuring that the force exerted on the floating plate is stable, and the rotation is not hindered when the angle is reset.
[0034] Furthermore, the drive shaft and the drive motor are torque-connected, and the transmission is disconnected when the circumferential transmission torque is greater than the meshing torque between the floating plate and the pressure plate; By connecting the driving shaft that resets the initial angle of the driving floating plate, pressure plate and pressure rod with the torque of the driving motor, the floating plate, pressure plate and pressure rod are blocked from disengaging from the meshing state and rotating relative to each other after the angles are in place, so that the transmission disconnection is replaced by the active transmission disconnection of the driving source, thereby reducing the wear of the pressure plate structure caused by the disengagement of the floating plate and the pressure plate, and further reducing the change in the meshing force caused by the wear of the sprocket plate structure, that is, the maximum downward force of the pressure rod.
[0035] Among them, the movable wheel at the bottom of the pressure rod is made of rubber tendon material to avoid hard contact with the ACF adhesive film and ensure the fit.
[0036] A method for ACF attachment using the above-mentioned bufferable ACF attachment device is characterized by comprising the following steps: S1: The ACF adhesive film strip is mounted on the feeding mechanism, and the end of the strip passes through the guide mechanism once and is connected to the winding mechanism; S2: Adjust the position of the ACF adhesive film strip to align with the crimping mechanism and the attachment station stroke; S3: Place the component to be bonded on the crimping base for positioning, start the equipment, and the hydraulic cylinder drives the pressing rod to press down to roll and attach the ACF adhesive film and then reset it; S4: The driving motor starts to drive the abutment plate and the pressure rod to rotate and reset the preset pressure of the initial angle to prepare for the next attachment process.
Claims
1. A bufferable ACF attaching device, characterized in that: include: A frame (1), wherein a crimping base (5) is disposed in the center of the frame (1), and a crimping mechanism (6) is disposed above the crimping base (5); A crimping mechanism (6), the crimping mechanism (6) comprising a slide (62) driven by a vertical hydraulic cylinder (61), a bottom of the slide (62) being provided with a pressure rod (65) with a movable wheel at the bottom for rotation along a vertical plane, the pressure rod (65) being elastically arranged to maintain an angle with the vertical direction through a pressure torsion spring (66); A feeding mechanism (2) and a winding mechanism (4) are respectively provided on both sides of the crimping mechanism (6), and the ACF adhesive film tape is passed through between the crimping base (5) and the crimping mechanism (6) pressure rod (65) through the guide mechanism (3).
2. The bufferable ACF attaching device according to claim 1, characterized in that: The bottom of the slide seat (62) is connected to a connecting frame (63), a mounting shaft (64) is fixed on the connecting frame (63), a pressure rod (65) is rotatably connected to the mounting shaft (64), a butt plate (68) is provided on the mounting shaft (64), a pressure torsion spring (66) is sleeved on the mounting shaft (64) between the pressure rod (65) and the butt plate (68), two ends of the pressure torsion spring (66) are respectively fixed on the pressure rod (65) and the butt plate (68), the pressure torsion spring (66) acts on the pressure rod (65) to keep the pressure rod (65) moving in a vertical downward state, and a protruding butt block (67) is provided on the inner wall of the connecting frame (63) to limit the pressure rod (65) to maintain a minimum angle of 10° with the vertical direction.
3. The bufferable ACF attaching device according to claim 2, characterized in that: The installation shaft (64) is provided with a stepped surface structure, which together with the connecting frame (63) performs axial clamping and limiting of the pressure rod (65).
4. The bufferable ACF attaching device according to claim 2, characterized in that: The contact plate (68) includes a pressure plate (681) and a floating plate (682). The pressure plate (681) is rotatably arranged on the mounting shaft (64) and is connected to one end of a pressure torsion spring (66) for circumferential transmission. The other side is circumferentially meshed with a floating plate (682) that slides along the mounting shaft (64) through a toothed plate structure. A pressure spring (683) is provided between the floating plate (682) and the inner wall of the connecting frame (63) and is sleeved on the outer side of the mounting shaft (64). The pressure spring acts on the floating plate (682) to mesh the floating plate (682) with the toothed plate structure of the pressure plate (681). A gear ring structure is provided on the circumferential surface of the floating plate (682) and is connected to a driving motor (610) on one side of the connecting frame (63) through a driving shaft (69).
5. The bufferable ACF attaching device according to claim 4, characterized in that: The influence coefficient of the pressure change on the pressure rod (65) caused by the angle torsion of the pressure torsion spring (66) is greater than the influence coefficient of the change in moment length on the pressure change on the pressure rod (65) after the angle change of the pressure rod (65).
6. The bufferable ACF attaching device according to claim 4, characterized in that: The floating plate (682) has elastically protruding movable teeth (684) therein, and the mounting shaft (64) has corresponding ratchet teeth (641). The floating plate (682) is rotatably connected to the mounting shaft (64) in a circumferential unidirectional limited position, and the limited position direction is consistent with the rotation direction of the pressure rod (65) when it is pressed downward.
7. The bufferable ACF attaching device according to claim 6, characterized in that: The drive shaft (69) and the drive motor (610) are torque-connected, and the transmission is disconnected when the circumferential transmission torque is greater than the meshing torque between the floating plate (682) and the pressure plate (681).
8. The bufferable ACF attaching device according to claim 1, characterized in that: The movable wheel at the bottom of the pressure rod (65) is made of rubber tendon.
9. A method for ACF attachment using the bufferable ACF attachment device according to claims 1 to 8, characterized in that: The following steps are involved: S1: The ACF adhesive film strip is mounted on the feeding mechanism (2), and the end of the strip is passed through the guide mechanism (3) once and then connected to the winding mechanism (4); S2: Adjust the position of the ACF adhesive film strip to align with the crimping mechanism (6) and with the attachment station stroke; S3: placing the component to be adhered on the crimping base (5) for positioning, starting the equipment, and the hydraulic cylinder (61) drives the pressing rod (65) to press down to roll and adhere the ACF adhesive film and then reset it; S4: The driving motor (610) is started to drive the abutment plate (68) and the pressure rod (65) to rotate to reset the preset pressure at the initial angle.