COF (chip on film) air pressure tape splicing device

Abstract

The invention is suitable for the technical field of material belt splicing equipment, and provides a COF air pressure belt splicing device which comprises a processing platform provided with a splicing area, a cutting assembly used for cutting a product belt, and a belt splicing assembly used for fixing and splicing an adhesive tape used for the product belt and enabling the adhesive tape to be attached to the product belt in the splicing area. The punching assembly is used for conducting positioning hole punching and adhesive tape cutting operation on the product belt in the joint area and comprises an air cylinder, a punching head connected with a driving shaft of the air cylinder and a pneumatic switch used for controlling pneumatic operation of the air cylinder, the pneumatic switch is connected with the air cylinder through an air path, and the punching head is arranged corresponding to the joint area in position. The pneumatic switch is started to drive the air cylinder to drive the punching head to move towards the joint area, uniform and consistent downward pressing force is provided for punching operation driven by air pressure, accurate alignment of punching positions is guaranteed through the uniform downward pressing force, joint precision is improved, and the risk that a product belt is damaged in the punching process is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of material splicing tape equipment, and in particular relates to a COF pneumatic tape splicer. Background Art

[0002] COF pneumatic tape splicer refers to a device or process used in COF (Chip On Film) packaging technology. COF is an IC packaging technology that uses a flexible substrate circuit as a carrier for the packaged chip, and uses heat pressing to bond the gold bumps on the chip to the inner pins on the flexible substrate circuit. As an important auxiliary tool, the tape splicer is widely used in product tape docking and defective product repair. The existing tape splicers are generally manual. After the two cut product tapes are bonded with tape, the positioning holes on the product tape will be blocked by the tape. At this time, the punching operation of the positioning holes and the cutting of the tapes on both sides of the product tape are often performed by the operator by hand pressure. The pressure of this manual punching depends on the operator's physical strength and skills, resulting in inconsistent pressure each time, which may affect the docking quality of the product tape.

[0003] Therefore, the prior art has defects. Summary of the invention

[0004] The purpose of the present invention is to overcome the disadvantages of the prior art that uneven manual punching force affects the quality of product tapes, and to provide a COF pneumatic tape splicer.

[0005] The present invention is implemented as follows: a COF air pressure tape splicer, comprising:

[0006] A processing platform, wherein a joining area for joining the product strips at both ends is provided on the processing platform;

[0007] A cutting assembly is arranged on one side of the processing platform, and is used for cutting the product strip;

[0008] A tape splicing assembly, used to fix the adhesive tape used to splice the product tape and enable the adhesive tape to be attached to the product tape in the splicing area;

[0009] The punching assembly includes a cylinder, a punching head connected to the driving shaft of the cylinder, and a pneumatic switch for controlling the pneumatic operation of the cylinder. The pneumatic switch is connected to the cylinder through an air circuit. The punching head is arranged at a position corresponding to the joining area. The pneumatic switch is activated to drive the cylinder to drive the punching head to move toward the joining area, so as to perform operations of punching positioning holes and cutting tapes on the product strip in the joining area.

[0010] Furthermore, it also includes a reception device frame, which includes a base and an upper cover that open and close to each other, the processing platform, the cutting component and the tape connecting component are all arranged on the base, and the punching component is arranged on the upper cover.

[0011] Furthermore, the base and the upper cover are hingedly connected.

[0012] Furthermore, the punching head includes a punching needle corresponding to the position of the positioning hole and punching knives corresponding to the positions on both sides of the product belt, and the position of the base corresponding to the joining area is provided with a first notch adapted to the punching needle and a second notch adapted to the punching knife.

[0013] Furthermore, the tape splicing assembly includes a roller for placing the tape roll and a positioning rod for positioning the tape material layer. The roller, the joining area and the positioning rod are arranged in sequence on the same straight line. The tape material layer starts from the roller, passes through the joining area and the positioning rod in sequence, and bypasses the positioning rod to travel back and forth to the joining area.

[0014] Furthermore, the positioning rod is connected to a telescopic structure, and the positioning rod is driven by the telescopic structure to move in a direction perpendicular to the tape material layer.

[0015] Furthermore, the level of the tape material layer at the discharge position on the roller and the level of the positioning rod are both lower than the level of the joining area.

[0016] Furthermore, slopes are provided between the roller and the joining area and between the joining area and the positioning rod, and each slope gradually slopes downward from a position close to the joining area.

[0017] Furthermore, a plurality of positioning pins for positioning the product belt are arranged on the processing platform, and the plurality of positioning pins are evenly distributed on both sides of the joining area.

[0018] Furthermore, the cutting assembly comprises a cutting knife, and a blade surface of the cutting knife used for cutting the product strip is tightly matched with one side of the processing platform.

[0019] The present invention provides a COF pneumatic tape splicer. After an operator cuts a product tape to be spliced ​​on a processing platform through a cutting assembly, the adhesive tape enters the processing platform through the tape splicing assembly and is aligned with the position of the product tape to be spliced ​​for bonding. Then, the operator starts the punching assembly through a pneumatic switch, and the cylinder drives the punching head to punch the product tape and the adhesive tape in the joining area. The pneumatically driven punching operation provides a uniform and consistent downward pressure. The uniform downward pressure ensures the precise alignment of the punching positions, thereby improving the joining accuracy and avoiding poor joining caused by uneven force that may be caused by manual punching, thereby reducing the risk of damage to the product tape during the punching process. The consistent downward pressure reduces the uneven wear of the punching head and extends the service life of the punching head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0022] Figure 1 The present invention is a schematic structural diagram of a COF air pressure tape splicer provided by the present invention.

[0023] Figure 2 The present invention is a schematic structural diagram of a COF air pressure tape splicer provided by the present invention when the base and the upper cover are opened.

[0024] Explanation of the accompanying drawings: 1. Processing platform; 11. Joint area; 12. Ramp; 13. Positioning pin; 2. Cutting assembly; 21. Cutter; 3. Tape splicing assembly; 31. Roller; 32. Positioning rod; 33. Telescopic structure; 4. Punching assembly; 41. Cylinder; 42. Punching head; 43. Pneumatic switch; 5. Reception device frame; 51. Base; 511. First slot; 512. Second slot; 52. Upper cover. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] See also Figure 1-Figure 2 , is a COF pneumatic tape splicer disclosed in the invention, which mainly includes a processing platform 1, a cutting component 2, a tape splicing component 3 and a punching component 4, and the above components are used to cut the defective part of the COF product tape and then re-join it. Among them:

[0027] The processing platform 1 is specifically used to place the COF product tape to be cut and joined. In order to ensure that the COF product tape can be accurately connected with the circuit board or other components, a number of positioning holes are generally provided on both sides of the COF product tape. In order to cut the COF product tape at the accurate position and achieve stable joining, the positioning holes on the COF product tape are utilized. A number of positioning pins 13 are also provided on the processing platform 1. During the cutting and joining process of the COF product tape, the positioning pins 13 pass through the positioning holes on both sides of the COF product tape to achieve the positioning of the COF product tape.

[0028] The cutting assembly 2 is used to cut the defective part of the COF product belt, and the cutting assembly 2 can be arranged on one side of the processing platform 1. The cutting assembly 2 specifically includes a cutter 21, one end of which can be rotatably connected to one side of the processing platform 1 through a bearing member, that is, the cutter 21 can rotate with the bearing member as the center of the circle. Preferably, the cutter 21 can also limit the rotation range of the cutter 21 itself by connecting a limit assembly. For example, the limit assembly can be a structure of a rotating limit pin, that is, by providing one or more limit pins on the cutter 21, these pins cooperate with the grooves provided on the processing platform 1. When the cutter 21 rotates to a specific position, the limit pin will fall into the groove, thereby limiting the further rotation of the cutter 21. By limiting the rotation range of the cutter 21, the limit assembly can prevent the cutter 21 from accidentally exceeding the expected range of motion, thereby reducing the risk of injury to the operator. Moreover, the blade surface of the cutter 21 used for cutting the product belt is tightly matched with one side of the processing platform 1, that is, the blade surface of the cutter 21 used for cutting the product belt and the side surface of the processing platform 1 can be combined with each other into a scissors-like structure, which can ensure that the cutter 21 moves accurately along a predetermined path during the cutting process, thereby reducing the cutting error while speeding up the cutting speed.

[0029] In the process of cutting the defective part of the COF product tape, the cutter 21 is first rotated to move the cutter 21 away from the processing platform 1. After the position of the COF product tape to be cut corresponds to the position of the cutter 21, the COF product tape is placed on the processing platform 1 according to the cutting position, and the COF product tape is positioned. The cutter 21 is then rotated to gradually move the cutter 21 toward the processing platform 1 until the cutter 21 is aligned with the cutting position for cutting. The original COF product tape can be divided into two, and the above cutting action is repeated on another section of the COF product tape to separate the defective part of the original COF product tape. At this time, the qualified product is two sections of COF product tape, and the two qualified sections of COF product tape need to be joined later to obtain a complete new COF product tape.

[0030] The tape splicing assembly 3 is used to fix the adhesive tape used for joining the product tape and to make the adhesive tape fit with the product tape. Specifically, a joining area 11 for joining the two ends of the product tape is provided on the processing platform 1, and a plurality of positioning pins 13 are evenly distributed on both sides of the joining area 11. Two sections of qualified COF product tapes are butted end-to-end in the joining area 11, and the two sections of qualified COF product tapes are fit together by the adhesive tape. Specifically, the tape splicing assembly 3 includes a roller 31 for placing the tape roll and a positioning rod 32 for positioning the tape material layer, and the roller 31, the joining area 11 and the positioning rod 32 are arranged in sequence on the same straight line, and the tape material layer starts from the roller 31 and passes through the joining area 11 and the positioning rod 32 in sequence, and bypasses the positioning rod 32 to go back and forth to the joining area 11. When bonding two sections of qualified COF product tapes, firstly, a layer of tape material is pulled out from the tape roll placed on the roller 31 onto the joint area 11, and then continued to be pulled out through the positioning rod 32. At this time, the non-adhesive layer of the tape material layer is in direct contact with the joint area 11, and the adhesive layer of the tape material layer is exposed. Then, the two sections of qualified COF product tapes are butt-jointed, so that the butt-jointed position is placed as close as possible to the center of the adhesive layer of the tape material layer, to ensure that the connecting ends of the two sections of qualified COF product tapes can be completely covered by the tape material layer, thereby ensuring the bonding effect. Then, the part of the tape layer that has passed through the positioning rod 32 is folded around the positioning rod 32, and the adhesive layer of the folded part of the tape layer is again attached to the docking position of the two sections of qualified COF product tapes, so that the upper and lower end surfaces of the docking position are covered by the tape layer, increasing the bonding area between the tape and the two sections of qualified COF product tapes, thereby improving the strength and stability of the joint, so that the two sections of qualified COF product tapes can be successfully docked to form a complete section of qualified COF product tape. In this process, the tape layer is folded through the positioning rod 32, and the tightness of the folded tape layer can be appropriately adjusted, so that the joint part can be made neater and smoother, ensuring the bonding effect while improving the appearance quality of the product tape. More preferably, the level of the tape material layer at the discharge position on the roller 31 and the level of the positioning rod 32 are both lower than the level of the joint area 11, which helps prevent the tape from rolling back after being pulled out from the roller 31, and ensures that the tape material layer can pass smoothly and closely adhere to the joint area 11 when pulled out, so that two sections of qualified COF product tape can achieve a smoother fit in the joint area 11. And there are slopes 12 between the roller 31 and the joint area 11 and between the joint area 11 and the positioning rod 32, and each slope 12 gradually slopes downward from a position close to the joint area 11, that is, the processing platform 1 is provided with slopes 12 at positions close to the roller 31 and the positioning rod 32, ensuring that the tape material layer can move more smoothly when pulled out, reducing the generation of wrinkles and bubbles.

[0031] Furthermore, the positioning rod 32 is connected to a telescopic structure 33, and the positioning rod 32 moves in a direction perpendicular to the tape material layer under the drive of the telescopic structure 33. The telescopic structure 33 can be a manual knob and screw mechanism, that is, the operator drives the screw by rotating the knob, and the screw is connected to the nut, and the nut is driven to move along the axis of the screw by rotation, so as to realize the telescopic movement of the positioning rod 32; the telescopic structure 33 can also be a manual slider and guide rail mechanism, that is, a manual slider is used to slide on a fixed guide rail, and the slider is connected to the positioning rod 32 through a connecting rod, and the movement of the slider drives the positioning rod 32 to telescope. In this scheme, the specific structure of the telescopic structure 33 is not limited, and the structures that can realize the telescopic movement of the positioning rod 32 are all within the protection scope of this scheme. Before the tape material layer starts from the roller, the positioning rod 32 is driven by the telescopic structure 33 to move in a direction away from the tape material layer, providing sufficient space for the pulling out of the tape material layer, and ensuring that the tape material layer is smoothly pulled out and passes through the joint area 11. After the tape layer is first bonded to the two sections of qualified COF product tape and before being folded in half, the positioning rod 32 is driven again by the telescopic structure 33 to move toward the tape layer until the positioning rod 32 completely passes through the tape layer and is located above the tape layer. Then, the tape layer can bypass the positioning rod 32 and be folded in half to be bonded to the two sections of qualified COF product tape for the second time.

[0032] After completing the joining operation of the qualified COF product tapes at both ends, the positioning holes in the joined COF product tape will be blocked by the tape material layer. Then, the punching assembly 4 is required to punch the positions corresponding to the positioning holes on the tape material layer so that the positioning holes are exposed again. In addition, the tapes on both sides of the product tape need to be cut off. The punching assembly 4 specifically includes a cylinder 41, a punching head 42 connected to the drive shaft of the cylinder 41, and a pneumatic switch 43 for controlling the pneumatic operation of the cylinder 41. The pneumatic switch 43 is connected to the cylinder 41 through an air circuit. The air circuit can be a series of pipes, hoses or channels for conveying compressed air. The design of the air circuit ensures that the compressed air can flow smoothly from the air source to the cylinder 41. The punching head 42 is set at the position corresponding to the joining area 11. The activation of the pneumatic switch 43 drives the cylinder 41 to drive the punching head 42 to move toward the joining area 11, and is used to perform the operations of punching the positioning holes and cutting the tape on the product tape in the joining area 11. The punching head 42 includes a punching needle corresponding to the position of the positioning hole and a punching knife corresponding to the position on both sides of the product belt. The punching needle and the punching knife can be connected to the same connecting piece, which is connected to the drive shaft of the cylinder 41. When the operator starts the pneumatic switch 43, when the pneumatic switch 43 opens the air circuit, compressed air flows into one end of the cylinder 41, pushing the drive shaft inside the cylinder 41. The movement of the drive shaft will directly drive the connecting piece to move. Under the push of the cylinder 41, the connecting piece drives the punching needle and the punching knife to move along a predetermined trajectory toward the joining area 11, so that the tape and the positioning holes on both sides of the product belt can be punched at the same time, so that the COF product belt that has been joined is separated from the tape. After the punching is completed, the pneumatic switch 43 can be operated to release the compressed air in the cylinder 41, so that the spring or other reset mechanism inside the cylinder 41 pulls the drive shaft and the punching head 42 back to the original position, ready for the next punching operation. The punching assembly 4 is pneumatically driven and has a high degree of automation. It can realize fast and continuous punching actions, significantly improve production efficiency, and also provide uniform and consistent downward pressure. The uniform downward pressure ensures the precise alignment of the punching and punching positions, thereby improving the joining accuracy and avoiding poor joining caused by uneven force that may be caused by manual punching, thereby reducing the risk of damage to the COF product belt during the punching process. The consistent downward pressure reduces the uneven wear of the punching head 42 and extends the service life of the punching head 42.

[0033] In order to make the structure of the whole equipment more compact, facilitate the overall layout and optimize the workflow, the pneumatic tape splicer is integrated, and the above components - processing platform 1, cutting component 2, tape splicing component 3 and punching component 4 are all arranged in a reception frame 5. The reception frame 5 specifically includes a base 51 and an upper cover 52 that open and close each other. To facilitate the opening and closing functions of the base 51 and the upper cover 52, the base 51 and the upper cover 52 are preferably hinged by a hinge, and the hinge is preferably a damping hinge. The damping hinge combines the functions of buffer closing and arbitrary stop, and can automatically stop when the upper cover 52 is opened to any angle to prevent the upper cover 52 from closing suddenly or opening excessively. The processing platform 1, cutting component 2 and tape splicing component 3 are all arranged on the base 51, wherein the cutting component 2 is specifically arranged on one side of the base 51, and the punching component 4 is arranged on the upper cover 52. The base 51 is placed on the operating table, and the upper cover 52 is opened to expose the processing platform 1. After the processing platform 1 completes the cutting of the defective COF product tape and the joining of the qualified COF product tape, the upper cover 52 is closed. At this time, the punching assembly 4 is aligned with the joining area 11, and the position of the base 51 corresponding to the joining area 11 is provided with a first notch 511 adapted to the punching needle and a second notch 512 adapted to the punching knife. The operator activates the start switch to drive the punching needle and the punching knife in the punching assembly 4 to move toward the joining area 11 until the punching needle moves into the first notch 511 and the punching knife moves into the second notch 512, so that the tape in the joining area 11 can be cut, completing a complete COF product tape joining operation. The COF product tape finished product can be taken away by opening the upper cover 52 again, and the operation is cyclical.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A COF air pressure splicer, characterized in that: include: A processing platform (1), wherein the processing platform (1) is provided with a joining area (11) for joining the product strips at both ends; A cutting assembly (2) is arranged on one side of the processing platform (1), and the cutting assembly (2) is used for cutting the product strip; A tape joint assembly (3) for fixing the adhesive tape used for joining the product tape and allowing the adhesive tape to be attached to the product tape at the joining area (11); A punching assembly (4) comprises a cylinder (41), a punching head (42) connected to a driving shaft of the cylinder (41), and a pneumatic switch (43) for controlling the pneumatic operation of the cylinder (41); the pneumatic switch (43) is connected to the cylinder (41) through an air circuit; the punching head (42) is arranged corresponding to the position of the joining area (11); the pneumatic switch (43) is activated to drive the cylinder (41) to drive the punching head (42) to move toward the joining area (11), so as to perform operations of punching positioning holes and cutting tape on a product strip in the joining area (11).

2. A COF air pressure tape splicer according to claim 1, characterized in that: The invention also comprises a reception frame (5), wherein the reception frame (5) comprises a base (51) and an upper cover (52) which are opened and closed with each other, wherein the processing platform (1), the cutting assembly (2) and the tape connection assembly (3) are all arranged on the base (51), and the punching assembly (4) is arranged on the upper cover (52).

3. A COF air pressure splicer according to claim 2, characterized in that: The base (51) and the upper cover (52) are hingedly connected.

4. A COF air pressure splicer according to claim 2, characterized in that: The punching head (42) comprises a punching needle corresponding to the position of the positioning hole and punching knives corresponding to the positions on both sides of the product belt, and the base (51) is provided with a first notch (511) adapted to the punching needle and a second notch (512) adapted to the punching knife at a position corresponding to the joining area (11).

5. The COF air pressure splicer according to claim 1, characterized in that: The tape splicing assembly (3) comprises a roller (31) for placing a tape roll and a positioning rod (32) for positioning a tape layer. The roller (31), the joining area (11) and the positioning rod (32) are arranged in sequence on the same straight line. The tape layer starts from the roller (31), passes through the joining area (11) and the positioning rod (32) in sequence, and bypasses the positioning rod (32) to travel back and forth to the joining area (11).

6. A COF air pressure tape splicer according to claim 5, characterized in that: The positioning rod (32) is connected to a telescopic structure (33), and the positioning rod (32) moves in a direction perpendicular to the tape material layer under the drive of the telescopic structure (33).

7. A COF air pressure tape splicer according to claim 5, characterized in that: The level of the discharge position of the tape material layer on the roller (31) and the level of the positioning rod (32) are both lower than the level of the joining area (11).

8. A COF air pressure splicer according to claim 6, characterized in that: A slope (12) is provided between the roller (31) and the joining area (11) and between the joining area (11) and the positioning rod (32), and each of the slopes (12) gradually slopes downward from a position close to the joining area (11).

9. A COF air pressure splicer according to claim 1, characterized in that: The processing platform (1) is provided with a plurality of positioning needles (13) for positioning the product belt, and the plurality of positioning needles (13) are evenly distributed on both sides of the joining area (11).

10. The COF air pressure splicer according to claim 1, characterized in that: The cutting assembly (2) comprises a cutting knife (21), and the blade surface of the cutting knife (21) used for cutting the product strip is tightly matched with one side of the processing platform (1).

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