Conductive double faced adhesive tape assembly and production line thereof

Abstract

The utility model relates to a conductive double-faced adhesive tape assembly and a production line thereof, the conductive double-faced adhesive tape assembly is provided with a conductive cloth layer, a first conductive double-faced adhesive tape layer and a second conductive double-faced adhesive tape layer are respectively attached to the front side and the back side of the conductive cloth layer, and the first conductive double-faced adhesive tape layer and the second conductive double-faced adhesive tape layer are arranged in a staggered mode. The conductive cloth layer is also provided with gap parts which are not covered by the conductive double-faced adhesive tape on two surfaces; by means of the structure, the step pitch of the die and the advancing speed of the material belt are accurately controlled, conductive double-faced adhesive tape raw materials on the front face and the back face are asynchronously cut into the shapes of the specified sizes respectively, meanwhile, a side contour line is formed, and conductive double-faced adhesive tape blocks fall on the specified positions of the conductive cloth belt at intervals in the mode that individuals are perpendicular to the material belt. According to the invention, the processing steps are optimized, the number of required dies is reduced, and the consumption of conductive double-faced adhesive tape materials at the gap part of a product is avoided, so that the processing cost is reduced, and the utilization rate of the materials is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die-cutting components for electronic products, and particularly refers to a conductive double-sided adhesive component and its production line. Background Art

[0002] Die-cutting components are widely used in electronic products or devices. Some electronic devices need to use a composite conductive component including conductive double-sided adhesive and conductive cloth to meet the requirements of component bonding, conductivity, and electromagnetic shielding simultaneously. The price of conductive double-sided adhesive is relatively expensive compared with other raw materials. When producing some irregular double-sided adhesive components, it is necessary to save materials and reduce costs. The conventional solution is to cut the rolled double-sided adhesive raw material into narrower rolled materials, and then unwind and pull them out along the production tape direction for die-cutting. However, in this solution, the materials in the gaps between the contour edges of two adjacent products will become waste materials, resulting in more waste of conductive double-sided adhesive materials. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a conductive double-sided adhesive component and its production line that save materials.

[0004] The technical solution adopted by the utility model is: a conductive double-sided adhesive component, which has a conductive cloth layer, and a first conductive double-sided adhesive layer and a second conductive double-sided adhesive layer are respectively attached to the front and back sides of the conductive cloth layer. The first conductive double-sided adhesive layer and the second conductive double-sided adhesive layer are arranged in a staggered manner, that is, there are gap parts on both sides of the conductive cloth layer where there is no coverage of conductive double-sided adhesive; the outer side and the contour lines at both ends of the first conductive double-sided adhesive layer coincide with the contour lines of one side of the conductive cloth layer and the corners at both ends of this side; the outer side and the contour lines at both ends of the second conductive double-sided adhesive layer coincide with the contour lines of the other side of the conductive cloth layer and the corners at both ends of this side; a first product release film is compounded on the outer surface of the first conductive double-sided adhesive layer, and the first product release film exactly completely covers the first conductive double-sided adhesive layer and only has a protruding handle part at one of its ends; a second product release film is compounded on the outer surface of the second conductive double-sided adhesive layer, and the second product release film completely covers the second conductive double-sided adhesive layer and the conductive cloth layer.

[0005] The conductive double-sided adhesive component is rectangular, its length direction is formed in the width direction of the conductive cloth tape and the conductive double-sided adhesive tape, and its width direction is formed in the length direction of the conductive cloth tape and the conductive double-sided adhesive tape.

[0006] The present utility model also provides a production line for manufacturing the above conductive double-sided adhesive assembly, which includes a high-speed rotary die-cutting machine. The high-speed rotary die-cutting machine is provided with a first asynchronous die-cutting roller group, a second asynchronous die-cutting roller group, a third die-cutting roller group, and a fourth die-cutting roller group. Among them, the cutting roller of the first asynchronous die-cutting roller group has a first straight cutting edge line for equally spaced cutting of the first conductive double-sided adhesive tape and a handle-end contour cutting edge for forming the contour line of the end of the handle part; the cutting roller of the second asynchronous die-cutting roller group has a second straight cutting edge for equally spaced cutting of the second conductive double-sided adhesive tape; the cutting roller of the third die-cutting roller group has a closed contour cutting edge corresponding to the contour line of the conductive cloth, and also has a handle-outer contour cutting edge corresponding to the outer contour line of the handle part of the first product release film. Moreover, the cutting edge height of the closed contour cutting edge at the position corresponding to the handle part of the first product release film is lower than that of other parts, that is, the cutting edge at the position corresponding to the handle part does not die-cut the first product release film; the cutting roller of the fourth die-cutting roller group is provided with a third straight cutting edge for cutting.

[0007] Through the above structural design and the design of the die-cutting roller groups in the production line, by precisely controlling the die step and the traveling speed of the tape, the conductive double-sided adhesive raw materials on both the front and back sides are respectively and asynchronously cut into specified sizes and shapes, and at the same time, one side contour line is formed. By adopting the arrangement where the individuals are perpendicular to the tape, the conductive double-sided adhesive blocks are spaced and fall at the specified positions on the conductive cloth tape, optimizing the processing steps, reducing the number of required molds, and also avoiding the consumption of conductive double-sided adhesive materials at the product gap part, thereby reducing the processing cost and effectively improving the material utilization rate. Description of the Drawings

[0008] Figure 1 、 Figure 2 is a schematic structural diagram of the conductive double-sided adhesive assembly of the present utility model;

[0009] Figure 3 is a flowchart of the processing technology of the present utility model;

[0010] Figure 4-1 、 Figure 4-2 、 Figure 4-3 、 Figure 4-4 are respectively schematic diagrams of the cutting edge expansion and die-cutting effect on the cutting rollers of the first asynchronous die-cutting roller group, the second asynchronous die-cutting roller group, the third die-cutting roller group, and the fourth die-cutting roller group adopted in the production line of the present utility model;

[0011] Figure 4-5 is Figures 4-1 to 4-4 a schematic diagram after superposing the die-cutting effects.

[0012] Figure 5 、 Figure 6 are respectively schematic diagrams of the waste material areas of the product structures using the traditional process and the product structure of the present utility model. Detailed Embodiments

[0013] The utility model relates to a conductive double-sided adhesive component that saves materials. As Figure 1 , Figure 2 shown, the conductive double-sided adhesive component has a conductive cloth layer 1, and a first conductive double-sided adhesive layer 2 and a second conductive double-sided adhesive layer 3 are respectively attached to the front and back surfaces of the conductive cloth layer 1. The first conductive double-sided adhesive layer 2 and the second conductive double-sided adhesive layer 3 are arranged in a staggered manner, that is, there is a gap portion 11 on both sides of the conductive cloth layer 1 that is not covered by the conductive double-sided adhesive; that is, in the direction perpendicular to the conductive cloth layer 1, the projections of the first conductive double-sided adhesive layer 2 and the second conductive double-sided adhesive layer 3 have no overlapping area; the outer side and the contour lines at both ends of the first conductive double-sided adhesive layer 2 coincide with the contour lines on one side of the conductive cloth layer 1 and the corners at both ends of this side, and the outer side and the contour lines at both ends of the second conductive double-sided adhesive layer 3 coincide with the contour lines on the other side of the conductive cloth layer 1 and the corners at both ends of this side; a first product release film 4 is compounded on the outer surface of the first conductive double-sided adhesive layer 2, and the first product release film 4 exactly completely covers the first conductive double-sided adhesive layer 2 and only has a protruding handle portion 41 at one of its ends, and the handle portion 41 protrudes along the length direction of the first conductive double-sided adhesive layer 2; a second product release film 5 is compounded on the outer surface of the second conductive double-sided adhesive layer 3, and the second product release film 5 completely covers the second conductive double-sided adhesive layer 2 and the conductive cloth layer 1. Both the handle portion 41 and the wide second product release film 5 are convenient for peeling during use. The second product release film 5 also plays a role in protecting the conductive cloth layer 1, and the other side of the conductive cloth layer 1 can also be protected by covering it with a shipping protective film.

[0014] Combined with Figure 3 , Figures 4-1 to 4-4 shown, the production process of the conductive double-sided adhesive component is carried out by a high-speed rotary die-cutting machine, and it includes the following steps:

[0015] Step a: The two first conductive double-sided adhesive tapes J1 are successively laminated with the first product release film tape L1 and the first transition backing film tape T1. After peeling off the self-adhesive film J11 of the first conductive double-sided adhesive tape from above, the first transition release film tape G1 is laminated. The first asynchronous die-cutting roller group M1 is used for the first asynchronous die-cutting and the first transition backing film tape T1 is removed. The cutter roller of the first asynchronous die-cutting roller group M1 has a first straight cutting edge line R101 for cutting the two first conductive double-sided adhesive tapes J1 and two handle-end contour cutting edges R102; the first asynchronous die-cutting cuts the first product release film tape L1 and the first conductive double-sided adhesive tape J1 into segments and arranges them at equal intervals on the first backing film tape T2. One side contour line of the first product release film tape and the first conductive double-sided adhesive tape after die-cutting serves as the inner contour line M101 of the first conductive double-sided adhesive layer and the first release film layer, and the handle-end contour line M102 of the first product release film 4 is formed; then the first transition release film tape G1 and the transition release film waste on the first conductive double-sided adhesive block are removed through the first waste tape P1. At this time, the main tape from bottom to top is the first backing film tape T2, the first release film blocks arranged at intervals on the first backing film tape T2, and the first conductive double-sided adhesive blocks; the distance between adjacent first release film blocks and first conductive double-sided adhesive blocks is controlled according to the width of the gap part 11 and the width of the second conductive double-sided adhesive layer 3, and it is appropriate to be able to arrange the second conductive double-sided adhesive layer 3 in a staggered manner to form the gap part 11;

[0016] Step b: The conductive fabric tape D1 is laminated on the main tape obtained in step a. At this time, the main tape from bottom to top is the first backing film tape T2, the first release film blocks arranged at intervals on the first backing film tape T2, the first conductive double-sided adhesive blocks, and the conductive fabric tape D1 covering the first conductive adhesive blocks;

[0017] Step c: At the upper rear of the running direction of the main material tape, the second conductive double-sided adhesive tape J2 is compounded with the second transition release film tape G2. The self-adhesive film J21 of the second conductive double-sided adhesive tape below is peeled off, and the tape is fed in the reverse direction of the running of the main material tape. At the same time, the third transition release film tape G3 is fed from below in the same direction. The second asynchronous die-cutting is performed by the second asynchronous die-cutting roller group M2. The number of the second conductive double-sided adhesive tapes J2 is the same as that of the first conductive double-sided adhesive tapes, that is, two. And the cutter roller of the second asynchronous die-cutting roller group M2 has a second linear cutting edge R201 for cutting the second conductive double-sided adhesive tape J2. The second asynchronous die-cutting cuts the second process release film tape G2 and the second conductive double-sided adhesive tape J2 into segments and arranges them at equal intervals on the third transition release film tape G3. Then, the transition release film waste on the second transition release film tape G2 and the second conductive double-sided adhesive block is removed by the second waste tape P2. Then, the tape is flipped by the first flipping roller Z1 to be compounded with the main material tape coming from step b. And the compounding position of the second conductive double-sided adhesive block forms a staggered interval with the first conductive double-sided adhesive block. The interval distance is the width of the gap part. At this time, from bottom to top, the main material tape is successively: the first bottom film tape T2, the first release film blocks arranged at intervals on the first bottom film tape T2, the first conductive double-sided adhesive blocks, the conductive fabric tape D1 covering the first conductive adhesive blocks, the second conductive double-sided adhesive blocks arranged at intervals on the conductive fabric tape D1, and the third transition release film tape G3 covering the second conductive double-sided adhesive blocks;

[0018] Step d: The main material tape after step c is synchronously die-cut by the third die-cutting roller group M3. The cutter roller of the third die-cutting roller group M3 has a closed contour cutting edge R301 corresponding to the number of the first conductive double-sided adhesive tapes and having a shape corresponding to the contour line of the conductive cloth, and also has a handle outer contour cutting edge R302 corresponding to the outer contour line of the handle part of the first product release film. And the closed contour cutting edge R301 has a cutting edge R303 at the position corresponding to the handle part of the first product release film (i.e., Figure 4-3At the position of the green line in the middle), the height of the blade is lower than that of other parts, that is, the blade R303 corresponding to the handle part does not die-cut the first product release film to maintain the handle part during the first asynchronous die-cutting, and the first conductive double-sided adhesive block outside the blade is excluded as waste; the synchronous die-cutting punches out the contour line M301 of the conductive cloth layer and the outer contour lines of the first conductive double-sided adhesive layer and the second conductive double-sided adhesive layer that coincide with the outer contour of the conductive cloth layer, and die-cuts the first product release film and the outer contour line M302 of its handle part. The outer contour line M302 of the handle part intersects with the end contour line M101 of the handle part formed in step a to form the handle part, and at this handle part, the die-cutting depth of the third die-cutting roller group M3 does not cut through the first product release film, only cuts off the first conductive double-sided adhesive block, and the die-cutting depth of the remaining parts just cuts through the first product release film; then the waste outside the third transition release film strip frame outside the contour line M301 of the conductive cloth layer, the waste outside the second conductive double-sided adhesive block frame, and the waste outside the conductive cloth strip frame are excluded, and then the third transition release film waste located inside the contour line M301 of the conductive cloth layer is excluded through the third waste removal tape P3, and then the fourth waste removal tape P4 and the second product release film strip L2 are laminated from above. The number of the fourth waste removal tapes P4 is also 2, and the fourth waste removal tape P4 does not contact the area within the conductive cloth layer 1, only contacts the first conductive double-sided adhesive waste, the first product release film waste, and the first bottom film strip T2 outside the conductive cloth layer 1, and then the first bottom film strip T2, the waste outside the first conductive double-sided adhesive frame, the waste outside the first product release film frame, and the fourth waste removal tape P4 are excluded from below; at this time, the strip from top to bottom is: the second product release film strip L2, the second conductive double-sided adhesive layer 3, the conductive cloth layer 1, the first conductive double-sided adhesive layer 2, the first product release film 4; that is, the product is transferred and pasted onto the second product release film strip L2;

[0019] Step e, then the shipping protective film strip B1 and the second bottom film strip T3 are laminated from below in sequence, and are slit by the fourth die-cutting roller group M4. There is a third straight blade R401 for slitting on the knife roller of the fourth die-cutting roller group M4. After slitting the second product release film strip L2 and the shipping protective film strip B1 from the position between adjacent products, the second bottom film strip T3 is peeled off, and the finished product is obtained by winding. The finished product includes, from bottom to top, the shipping protective film, the first product release film 4, the first conductive double-sided adhesive layer 2, the conductive cloth layer 1, the second conductive double-sided adhesive layer 3, and the second product release film 5.

[0020] Such as Figure 5 、 Figure 6As shown, taking the production of the above conductive double-sided adhesive components with the same specifications and the same quantity as an example, in the process of the present utility model, the conductive double-sided adhesive tape is divided into four wide tapes of the same specification with relatively large widths, while the traditional process requires five narrow tapes of two specifications and smaller widths. Therefore, the process of the present utility model has fewer steps and lower alignment difficulty, while the cutting and alignment processes of the traditional process are more complex and cumbersome; the shaded part in the figure is the generated conductive double-sided adhesive waste. The conductive double-sided adhesive material required by the process of the present utility model actually saves about 30%-50% compared with the conductive double-sided adhesive material required by the traditional die-cutting waste removal process.

[0021] In summary, through the above structure, the present utility model accurately controls the die pitch and the tape traveling speed, separately and asynchronously cuts the conductive double-sided adhesive raw materials on both the front and back sides into specified sizes and shapes, and simultaneously forms one side contour line. By arranging the individuals perpendicular to the tape, the conductive double-sided adhesive blocks are spaced and fall on the specified positions of the conductive fabric tape, optimizing the processing steps, reducing the number of required dies, and also avoiding the conductive double-sided adhesive material consumed in the gap part of the product, thereby reducing the processing cost and effectively improving the material utilization rate.

[0022] The above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A conductive double-sided adhesive component, characterized in that: The conductive double-sided adhesive assembly has a conductive cloth layer, on the front and back surfaces of which a first conductive double-sided adhesive layer and a second conductive double-sided adhesive layer are respectively attached, and the first conductive double-sided adhesive layer and the second conductive double-sided adhesive layer are arranged in a staggered manner, that is, there are gap portions on both sides of the conductive cloth layer that are not covered by the conductive double-sided adhesive; the outer side and the two end contour lines of the first conductive double-sided adhesive layer coincide with the contour lines of one side and the two end corners of this side of the conductive cloth layer, and the outer side and the two end contour lines of the second conductive double-sided adhesive layer coincide with the contour lines of the other side and the two end corners of this side of the conductive cloth layer; a first product release film is laminated on the outer surface of the first conductive double-sided adhesive layer, and the first product release film exactly completely covers the first conductive double-sided adhesive layer and has a protruding handle portion only at one of its ends; a second product release film is laminated on the outer surface of the second conductive double-sided adhesive layer, and the second product release film completely covers the second conductive double-sided adhesive layer and the conductive cloth layer.

2. The conductive double-sided adhesive component according to claim 1, wherein: The conductive double-sided adhesive assembly is rectangular, its length direction is formed in the width direction of the conductive cloth tape and the conductive double-sided adhesive tape, and its width direction is formed in the length direction of the conductive cloth tape and the conductive double-sided adhesive tape.

3. A production line for manufacturing the conductive double-sided adhesive assembly according to claim 1 or 2, comprising a high-speed rotary die-cutting machine, characterized in that: In the high-speed rotary die-cutting machine, there are a first asynchronous die-cutting roller group, a second asynchronous die-cutting roller group, a third die-cutting roller group and a fourth die-cutting roller group. Among them, on the cutting roller of the first asynchronous die-cutting roller group, there are a first straight cutting edge line for equally spaced cutting of the first conductive double-sided adhesive tape and a handle portion end contour line cutting edge for forming the end contour line of the handle portion; on the cutting roller of the second asynchronous die-cutting roller group, there are second straight cutting edges for equally spaced cutting of the second conductive double-sided adhesive tape; on the cutting roller of the third die-cutting roller group, there is a closed contour line cutting edge corresponding to the contour line of the conductive cloth, and there is also a handle portion outer contour line cutting edge corresponding to the outer contour line of the handle portion of the first product release film, and the cutting edge height of the closed contour line cutting edge at the position corresponding to the handle portion of the first product release film is lower than that of other parts, that is, the cutting edge at the position corresponding to the handle portion does not die-cut the first product release film; on the cutting roller of the fourth die-cutting roller group, there is a third straight cutting edge for cutting.

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