An ACF conductive adhesive application device

Abstract

This invention discloses an ACF conductive adhesive bonding device, comprising a frame with a feeding assembly for automatically feeding ACF tape; a bonding unit having a heated pressure head assembly, a material carrier, and a bonding drive component, wherein the material carrier holds the attachment to be bonded, and the ACF tape passes between the heated pressure head assembly and the material carrier with the adhesive layer of the ACF tape facing the material carrier; a separating assembly capable of reciprocating between the heated pressure head assembly and the material carrier to separate the ACF tape without adhesive from the attachment to be bonded after bonding; a cutting assembly to cut the conductive adhesive layer of the ACF tape to a set length before it flows into the bonding unit; and a retrieval assembly to pull and retrieve the ACF tape without adhesive. This invention automates the ACF bonding production process, reduces the workload of operators, improves work efficiency, ensures bonding accuracy, and reduces labor costs.

Description

Technical Field

[0001] This utility model relates to the field of ACF bonding technology, specifically, it demonstrates an ACF conductive adhesive bonding device. Background Technology

[0002] Anisotropic conductive film (ACF) has a non-adhesive backing film on one side and a conductive adhesive layer made of resin that becomes adhesive when heated on the other side.

[0003] In addition to the LCD panel, a driver chip is required around the LCD to control the display signal. In order to enable the chip to conduct, a layer of conductive adhesive film ACF must be laminated onto the flexible circuit board (FPC).

[0004] In current production processes, applying ACF adhesive to circuit boards is primarily done manually. Workers cut the appropriate length of ACF adhesive to the desired length using scissors, place it on the board, smooth it with a smoothing stick, press it with cotton swabs for reinforcement, and finally remove the release film. This completes the process of applying ACF adhesive to the circuit board. However, this manual method results in low application accuracy, requires a high level of operator skill, has low efficiency, and incurs high labor costs. Utility Model Content

[0005] The purpose of this invention is to provide an ACF conductive adhesive application device to improve the efficiency of applying ACF to FPCs.

[0006] The technical solution is as follows:

[0007] An ACF conductive adhesive application device includes a frame, on which:

[0008] Feeding assembly for automatic feeding of ACF tape;

[0009] The bonding unit is located on the ACF tape outlet side of the feeding assembly. The bonding unit has a heating pressure head assembly, a carrier material seat, and a bonding drive component. The carrier material seat is used to place the attachment to be bonded. The ACF tape passes between the heating pressure head assembly and the carrier material seat, and the adhesive layer of the ACF tape faces the carrier material seat. The bonding drive component realizes the downward pressing action of the heating pressure head assembly toward the carrier material seat.

[0010] The separation component can move back and forth between the heated pressure head assembly and the carrier material seat to separate the ACF tape without adhesive layer from the accessory to be attached after the application is completed;

[0011] A cutting component is provided near the feed side of the bonding unit to cut the conductive adhesive layer on the ACF tape to a set length before it flows into the bonding unit.

[0012] A recycling component is located on the discharge side of the bonding unit to pull and recycle ACF strips without adhesive layers.

[0013] In addition, the ACF conductive adhesive application device according to the above embodiments of the present invention may also have the following additional technical features:

[0014] According to one embodiment of this utility model, the frame is further provided with a front tensioning group and a rear tensioning wheel. The front tensioning group is located between the feeding assembly and the cutting assembly to keep the ACF material strip flowing out of the feeding assembly taut at all times. The rear tensioning wheel is located between the bonding unit and the recycling assembly to cooperate with the front tensioning group so that the ACF material strip between them always passes through the bonding unit in a horizontal posture. The coordinated cooperation of the front tensioning group and the rear tensioning wheel ensures that the ACF material strip can maintain a taut posture during the bonding and recycling processes, preventing the ACF material strip from slipping and affecting the conveying.

[0015] Based on the above technical solution, the pre-tensioning assembly includes a guide wheel, an intermediate wheel, and an end wheel arranged sequentially, and the guide wheel, intermediate wheel, and end wheel are not on the same straight line. The guide wheel is vertically movable within the frame. The tension of the material belt is adjusted by the guide wheel to maintain continuous tension, thereby ensuring smoother material belt transmission.

[0016] Based on the above technical solution, a fixed sliding rod is provided on one side of the frame, allowing the guide wheel to slide up and down. The guide wheel is connected to the fixed sliding rod via a sliding block. On the other side of the frame, two rotatable upper and lower rotating wheels are provided. A transmission rope is installed between the upper and lower rotating wheels, with one end of the transmission rope connected to the sliding block and the other end connected to a counterweight. The design of the upper and lower rotating wheels, the transmission rope, and the counterweight allows for flexible and automatic adjustment of the conveyor belt tension according to the actual working environment.

[0017] According to one embodiment of this utility model, the frame is further provided with an electrostatic detector and an electrostatic eliminator. The electrostatic detector is located on the material support base, and the head of the electrostatic eliminator faces the space between the heating pressure head assembly and the material support base. This eliminates surface static electricity after the FPC is coated with ACF, reduces the impact of static electricity, and thus improves product quality.

[0018] According to one embodiment of this utility model, the heated pressure head assembly includes a connecting plate, a mounting plate, a heat insulation plate, and a pressure head plate arranged sequentially. The connecting plate is disposed on the attachment drive component, and an electric heating rod is disposed on the pressure head plate. Heating accelerates the attachment process and improves production efficiency.

[0019] Based on the above technical solution, an elastic floating connection is established between the connecting plate and the mounting plate. This creates a certain buffering effect, preventing excessive pressure from damaging the FPC product.

[0020] According to one embodiment of this utility model, the separation component includes a lever, a displacement mounting body, and a separation drive component. The lever protrudes from the displacement mounting body, and a horizontal sliding connection is established between the displacement mounting body and the frame. The separation drive component is disposed on the frame and drives the displacement mounting body to perform a translational movement relative to the frame. After attachment, the release film portion of the ACF tape needs to be peeled off for subsequent empty tape recycling operations.

[0021] According to one embodiment of the present invention, the cutting assembly includes a vertically positioned limiting body, a movable body, and a driving body. The driving body drives the movable body to move closer to or away from the limiting body. The movable body is provided with a cutting blade with a protruding edge. This allows for cutting the adhesive layer on the ACF strip to a preset length, forming an attachment segment suitable for the length of the FPC.

[0022] Based on the above technical solution, the movable body is mounted on the frame via a mounting body. A slide rail is provided on the movable body, and a slider body that can movably engage with the slide rail is provided on the mounting body. The top of the slide rail protrudes from the movable body and is positioned higher than the cutter. An adjusting screw is movably mounted on a limiting body, and the bottom end of the limiting body has a slot for the adjusting screw to abut against the slide rail. This allows for adjustment of the cutter's cutting depth and is suitable for use with ACF strips of different thicknesses.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: the feeding component realizes automatic feeding of ACF material strip, the cutting component divides the adhesive layer on the ACF material strip into preset lengths, the divided ACF material strip flows into the bonding unit and completes the heating and bonding with FPC, the separating component peels the ACF material strip without adhesive layer from the FPC product, and finally the recycling component pulls and recycles the ACF material strip without adhesive layer; this realizes the automation of the ACF bonding production process, reduces the workload of operators, improves the work efficiency, ensures the bonding accuracy, and reduces labor costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an ACF conductive adhesive application device according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the attachment unit portion in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the cutting component in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the front tensioning assembly in an embodiment of the present invention;

[0028] The following are the relevant markings in the attached diagram: 1-Frame, 2-Feeding assembly, 3-Attaching unit, 4-Separation assembly, 5-Cutting assembly, 6-Recovery assembly, 7-Front tensioning assembly, 8-Rear tensioning wheel, 9-Electrostatic detector, 10-Electrostatic eliminator; 31-Heating pressure head assembly, 32-Material support seat, 33-Attaching drive unit, 311-Connecting plate, 312-Mounting plate, 313-Insulation plate, 314-Pressure head plate, 315-Electric heating rod; 4 1-Lever, 42-Displacement mounting body, 43-Separation drive component; 51-Limiting body, 52-Moving body, 53-Driver body, 54-Cutter, 55-Mounting body, 56-Adjusting screw, 511-Slotted opening, 521-Slide rail, 551-Slider body; 71-Guide wheel, 72-Intermediate wheel, 73-End wheel, 74-Fixed slide bar, 75-Sliding block, 76-Upper rotating wheel, 77-Lower rotating wheel, 78-Transmission rope, 79-Counterweight block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figures 1 to 4 As shown in the figure. This utility model embodiment proposes an ACF conductive adhesive application device, which mainly includes a frame 1, and a feeding component 2, an application unit 3, a separating component 4, a cutting component 5, and a recycling component 6 disposed on the frame 1. In this embodiment, the feeding component 2 is located at the top, the application unit 3 is located below the feeding component 2, the separating component 4 is located to the right of the application unit 3, the cutting component 5 is located to the left of the application unit 3, and the recycling component 6 is located on the upper side between the feeding component 2 and the application unit 3. The ACF conductive adhesive application device is installed vertically to save space. Of course, these components can also be arranged horizontally.

[0031] The feeding assembly 2 is mainly used for automatic feeding of ACF strip. In this embodiment, it consists of a feeding rotary motor and a material reel. The material reel is wound with ACF strip, and the feeding rotary motor drives the material reel to rotate, thereby realizing the automatic feeding of ACF strip.

[0032] The attachment unit 3 is located on the ACF tape outlet side of the feeding assembly 2. The attachment unit 3 has a heating pressure head assembly 31, a carrier base 32, and an attachment drive 33. The carrier base 32 is mainly used to place the attachment to be attached. The attachment to be attached can be fixed on the carrier base 32 by means of pressing or vacuum adsorption. The ACF tape passes between the heating pressure head assembly 31 and the carrier base 32, and the adhesive layer of the ACF tape faces the carrier base. The attachment drive 33 realizes the downward pressing action of the heating pressure head assembly 31 toward the carrier base 32 to press the adhesive layer on the ACF tape onto the attachment to be attached.

[0033] The separation component 4 is capable of moving back and forth between the heated pressure head assembly 31 and the carrier material seat 32, and is used to separate the ACF tape without adhesive layer from the attachment to be applied after the application is completed.

[0034] The cutting component 5 is located on the feed side adjacent to the bonding unit 3 to cut the conductive adhesive layer on the ACF tape to a set length before it flows into the bonding unit. This facilitates the peeling of the ACF tape during subsequent separation and does not affect other adhesive layers on the ACF tape.

[0035] The recycling component 6 is located on the discharge side of the attachment unit 3 to pull and recycle the ACF strip without adhesive layer for collection. The recycling component can use a recycling rotary motor and recycling rollers to automatically wind up the ACF strip.

[0036] In other possible implementations, the frame 1 is also equipped with a front tensioning group 7 and a rear tensioning wheel 8. The front tensioning group 7 is located between the feeding assembly 2 and the cutting assembly 5 to keep the ACF strip flowing out of the feeding assembly taut. The rear tensioning wheel 8 is located between the bonding unit 3 and the recycling assembly 6 to cooperate with the front tensioning group 7 so that the ACF strip between them always passes through the bonding unit 3 in a horizontal posture. In the attached figure, the front tensioning group 7 and the rear tensioning wheel 8 are located on both sides of the bonding unit 3. The coordinated cooperation of the front tensioning group and the rear tensioning wheel ensures that the ACF strip can maintain a taut posture during the bonding and recycling processes, preventing the ACF strip from slipping and affecting the conveying. It also ensures that when the ACF strip flows into the bonding unit, it can be parallel to the attachment to be bonded on the support seat in an almost horizontal posture. However, before the pressing bonding action is activated, the adhesive layer of the ACF strip does not come into contact with the attachment to be bonded.

[0037] Regarding the pre-tensioning assembly 7: it includes a guide wheel 71, an intermediate wheel 72, and an end wheel 73 arranged sequentially from top to bottom. The guide wheel 71, intermediate wheel 72, and end wheel 73 are not on the same straight line. The ACF material belt flowing out from the feeding assembly 2 will pass through the guide wheel 71, intermediate wheel 72, and end wheel 73 in sequence, so that the ACF material belt can maintain a certain tension. The guide wheel 71 can be floating up and down on the frame 1. In this way, the tension of the material belt is adjusted by the floating guide wheel 71 to keep the tension of the material belt continuous, thereby ensuring a smoother material belt transmission.

[0038] One floating design for the guide wheel 71 is as follows: A fixed slide rod 74 is provided on one side of the front of the frame 1, allowing the guide wheel 71 to slide up and down. The guide wheel 71 is connected to the fixed slide rod 74 via a sliding block 75, which is movably fitted onto the fixed slide rod 74. On the other side of the back of the frame 1, a ground wheel 76 and a lower wheel 77 are provided, both rotatable. A transmission rope 78 is provided between the upper wheel 76 and the lower wheel 77. One side of the transmission rope 78 is connected to the sliding block 75, and the other side of the transmission rope 78 is equipped with a counterweight 79. That is to say... Sliding block 75 and counterweight block 79 are located on both sides of the upper roller 76 and lower roller 77, respectively. When the ACF material belt flows through the guide roller, it will exert a downward force on the guide roller. This force will also act on the sliding block, forcing the sliding block to move downward relative to the fixed slide rod. Meanwhile, the counterweight block on the other side will exert an upward force on the sliding block through the transmission rope, forcing the sliding block to move upward relative to the fixed slide rail. This combination of upward and downward forces will cause the guide roller to float up and down, so that the tension of the material belt can be flexibly and automatically adjusted according to the actual working environment.

[0039] In other possible implementations, the frame 1 is also equipped with an electrostatic detector 9 and an electrostatic eliminator 10. The electrostatic detector 9 is located on the material support 32 and is used to detect and determine whether there is static electricity on the attachment to be attached. The head of the electrostatic eliminator 10 faces the space between the heating head assembly 31 and the material support 32. If there is static electricity on the attachment to be attached, the electrostatic eliminator will eliminate the surface static electricity after the FPC is attached with ACF, reduce the impact of static electricity, and thus improve product quality.

[0040] In this embodiment, the heated pressing head assembly 31 includes a connecting plate 311, a mounting plate 312, a heat insulation plate 313, and a pressing head plate 314 arranged sequentially from top to bottom. The connecting plate 311 is mounted on the attachment drive 33, which is mounted on the frame 1. It is generally a cylinder component. The attachment drive 33 drives the lower part of the connecting plate 311 to move closer to or away from the material support 32 below. An electric heating rod 315 is provided on the pressing head plate 314. After the electric heating rod 315 is energized, the pressing head plate 314 reaches a certain temperature. Heating can accelerate the ACF adhesive application process and improve production efficiency.

[0041] Furthermore, an elastic floating connection is established between the connecting plate 311 and the mounting plate 312. In practice, several spring components can be used between the connecting plate and the mounting plate to form a certain downward pressure buffer effect, so as to avoid excessive pressure on the pressure head plate and damage to the quality of the FPC product.

[0042] In this embodiment, the separation component 4 includes a lever 41, a displacement mounting body 42, and a separation drive 43. The lever 41 protrudes from the displacement mounting body 42 and is typically vertically positioned. A horizontal sliding connection is established between the displacement mounting body 42 and the frame 1, for example, through a standard slider rail. The separation drive 43 is located on the frame 1 and drives the displacement mounting body 42 to translate relative to the frame 1. After attachment is completed, the release film portion of the ACF tape needs to be peeled off. The lever is controlled to move the ACF tape from right to left, gradually separating the empty tape from the attachment to be attached, facilitating subsequent empty tape recycling.

[0043] In this embodiment, the cutting assembly 5 includes a vertically positioned limiting body 51, a movable body 52, and a driving body 53. The driving body 53 drives the movable body 52 to move closer to or away from the limiting body 51. The driving body is a cylinder, and the movable body 52 is provided with a cutter 54 with its blade protruding slightly upward. After the ACF tape passes between the limiting body and the movable body for a preset length, the driving body drives the cutter on the movable body downward to approach the adhesive layer of the ACF tape, so as to cut the adhesive layer on the ACF tape for a preset length, forming an attachment section suitable for the length of the FPC. The cutter only cuts the adhesive layer and does not cut the release film portion of the ACF tape.

[0044] Furthermore, in order to better adapt to the cutting of ACF strips with different adhesive layer thicknesses, the following design is made: The movable body 52 is mounted on the frame 1 via a mounting body 55. A vertical slide rail 521 is provided on the movable body 52. ​​A slider body 551 that can be movably engaged with the slide rail 521 is provided on the mounting body 55. The movable body 52 and the mounting body 55 are relatively slidably connected through the cooperation of the slider body 551 and the slide rail 521. The top of the slide rail 521 protrudes slightly upward from the top surface of the movable body 52, and the top position of the slide rail 521 is higher than the blade position of the cutter 54. An adjusting screw 56 is movably provided on the limiting body 51 by means of a threaded connection. The bottom end of the limiting body 51 is provided with a slot 511 that allows the adjusting screw 56 to abut against the slide rail 521. The driving body 53 drives the moving body 52 upward to approach the limiting body 51 until the top of the slide rail 521 enters the slot 511 and contacts the bottom end of the adjusting screw 56. By turning the adjusting screw 56, the height of contact with the slide rail 521 is changed, thereby adjusting the minimum distance between the blade and the bottom end face of the limiting body, and thus adjusting the cutting depth of the cutter. This makes it suitable for use with ACF strips of different thicknesses.

[0045] In use: The feeding component automatically feeds the ACF strip, the cutting component cuts the adhesive layer on the ACF strip to a preset length, the cut ACF strip flows into the bonding unit and completes the heating and bonding with the FPC, the separating component separates the ACF strip without adhesive layer from the FPC product, and finally the recycling component pulls and recycles the ACF strip without adhesive layer.

[0046] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An ACF conductive adhesive attaching apparatus comprising a frame (1), characterized in that, The frame (1) is equipped with: Feeding assembly (2) is used for automatic feeding of ACF strip; The attaching unit (3) is located on the ACF tape discharge side of the feeding assembly (2). The attaching unit (3) has a heating head assembly (31), a carrier seat (32), and an attaching drive (33). The carrier seat (32) is used to place the attachment to be attached. The ACF tape passes between the heating head assembly (31) and the carrier seat (32), and the adhesive layer of the ACF tape faces the carrier seat (32). The attaching drive (33) realizes the downward pressing action of the heating head assembly (31) toward the carrier seat (32). The separation component (4) can move back and forth between the heated pressure head assembly (31) and the carrier material seat (32) to separate the ACF tape without adhesive layer from the accessory to be attached after the attachment is completed; The cutting component (5) is provided near the feed side of the bonding unit (3) to cut the conductive adhesive layer on the ACF tape to a set length before the tape flows into the bonding unit (3). A recycling component (6) is provided on the discharge side of the attachment unit (3) to pull and recycle ACF strips without adhesive layer.

2. The ACF conductive paste attaching apparatus according to claim 1, wherein The frame (1) is also provided with a front tensioning group (7) and a rear tensioning wheel (8). The front tensioning group (7) is located between the feeding assembly (2) and the cutting assembly (5) to keep the ACF material strip flowing out from the feeding assembly (2) always in a tensioned state. The rear tensioning wheel (8) is located between the attaching unit (3) and the recycling assembly (6) to cooperate with the front tensioning group (7) so that the ACF material strip between the two always passes through the attaching unit (3) in a horizontal posture.

3. The ACF conductive paste attaching apparatus according to claim 2, wherein The front tensioning assembly (7) includes a guide wheel (71), an intermediate wheel (72), and an end wheel (73) arranged in sequence. The guide wheel (71), the intermediate wheel (72), and the end wheel (73) are not on the same straight line. The guide wheel (71) is arranged on the frame (1) in a way that allows it to float up and down.

4. The ACF conductive paste attaching apparatus according to claim 3, wherein A fixed slide rod (74) is provided on one side of the frame (1) for the guide wheel (71) to slide up and down. The guide wheel (71) is connected to the fixed slide rod (74) through a sliding block (75). On the other side of the frame (1), a ground wheel (76) and a lower wheel (77) are provided that are vertically aligned and rotatable. A transmission rope (78) is provided between the upper wheel (76) and the lower wheel (77). One side of the transmission rope (78) is connected to the sliding block (75), and the other side of the transmission rope (78) is provided with a counterweight (79).

5. The ACF conductive paste attaching apparatus according to claim 1, wherein The frame (1) is also equipped with an electrostatic detector (9) and an electrostatic eliminator (10). The electrostatic detector (9) is located on the material support seat (32), and the head end of the electrostatic eliminator (10) faces between the heating head assembly (31) and the material support seat (32).

6. The ACF conductive paste attaching apparatus according to claim 1, wherein The heating head assembly (31) includes a connecting plate (311), a mounting plate (312), a heat insulation plate (313), and a head plate (314) arranged in sequence. The connecting plate (311) is located on the attachment drive (33), and an electric heating rod (315) is provided on the head plate (314).

7. The ACF conductive paste attaching apparatus according to claim 6, wherein An elastic floating connection is established between the connecting plate (311) and the mounting plate (312).

8. The ACF conductive adhesive bonding device according to claim 1, characterized in that, The separation component (4) includes a lever (41), a displacement mounting body (42), and a separation drive (43). The lever (41) protrudes from the displacement mounting body (42), and a horizontal sliding connection is established between the displacement mounting body (42) and the frame (1). The separation drive (43) is located on the frame (1) and drives the displacement mounting body (42) to make a translational movement relative to the frame (1).

9. The ACF conductive adhesive bonding device according to claim 1, characterized in that, The cutting assembly (5) includes a limiting body (51) that is positioned vertically, a moving body (52), and a driving body (53). The driving body (53) drives the moving body (52) to move closer to or away from the limiting body (51). The moving body (52) is provided with a cutting blade (54) with a protruding blade.

10. An ACF conductive adhesive bonding device according to claim 9, characterized in that, The movable body (52) is mounted on the frame (1) via a mounting body (55). A slide rail (521) is provided on the movable body (52), and a slider (551) that can be movably engaged with the slide rail (521) is provided on the mounting body (55). The top of the slide rail (521) protrudes from the movable body (52) and is positioned higher than the cutter (54). An adjusting screw (56) is movably mounted on the limiting body (51). The bottom end of the limiting body (51) is provided with an opening (511) that allows the adjusting screw (56) to abut against the slide rail (521).

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