Adhesive-backed copper foil folding process system and adhesive-backed copper foil transformer

Abstract

The present invention discloses a process system for folding adhesive-backed copper foil, comprising a tape storage roll lead-out portion, a copper foil pasting portion, a tape edge cutting portion, a copper foil rolling portion, a tape edge folding portion, a folded tape rolling portion and a folded copper foil tape winding portion; a horizontal straight single-sided tape with the adhesive surface facing upwards, which is led out from the tape storage roll lead-out portion, passes through the copper foil pasting portion, the tape edge cutting portion, the copper foil rolling portion, the tape edge folding portion and the folded tape rolling portion in a horizontal straight direction, and is finally wound up and stored by a winding device of the folded copper foil tape winding portion; this solution provides a process system for continuously producing and storing adhesive-backed copper foil.

Description

Technical Field

[0001] The invention belongs to the field of transformer copper foil adhesive. Background Art

[0002] like Figure 1 As shown in the figure, the adhesive copper foil strip is a composite material obtained by pasting copper foil and insulating tape together and folding the edges to bond them together. The adhesive copper foil can be wrapped around the outside of the transformer coil, such as Figure 2 As shown, it can effectively absorb high-frequency electromagnetic interference and reduce the radiation range of electromagnetic waves, thereby ensuring the normal operation of the transformer. The adhesive-backed copper foil can help to dissipate the heat generated by the transformer. This solution provides a process system for continuously producing and storing such adhesive-backed copper foil. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a self-adhesive copper foil folding process system and a self-adhesive copper foil transformer, and provides a process system for continuously producing and storing self-adhesive copper foil.

[0004] Technical solution: To achieve the above-mentioned purpose, the adhesive folding process system of the adhesive-backed copper foil of the present invention includes a tape storage roll lead-out part, a copper foil sheet pasting part, a tape edge cutting part, a copper foil sheet rolling part, a tape edge folding part, a folded tape rolling part and a folded copper foil tape winding part;

[0005] The horizontal straight single-sided tape with the adhesive surface facing upwards, which is led out from the tape storage roll lead-out section, passes through the copper foil pasting section, the tape edge cutting section, the copper foil rolling section, the tape edge folding section and the folded tape rolling section in the horizontal straight direction, and is finally rolled up and stored by the winding device of the folded copper foil tape winding section.

[0006] Furthermore, a tape guiding platform is provided at the copper foil pasting portion and the tape edge cutting portion along the length direction, and the horizontal straight single-sided tape is on the upper surface of the tape guiding platform; a robot or manual pasting station is provided at the copper foil pasting portion that can center the rectangular copper foil on the upper surface of the horizontal straight single-sided tape.

[0007] Furthermore, a knife holder that can perform lifting and lowering movements is provided above the horizontal straight single-sided tape at the edge cutting portion of the tape, and two cutting knives with sharp ends facing downwards are symmetrically provided on the lower part of the knife holder. When the knife holder is lowered, the two cutting knives can symmetrically cut two cutting seams perpendicular to the length direction of the horizontal straight single-sided tape at the two edges of the horizontal straight single-sided tape.

[0008] Furthermore, the tape edge folding portion is provided with a tape folding platform, which is horizontally connected to the tape guiding platform; the copper foil rolling portion is at the connection between the tape folding platform and the tape guiding platform; and a copper foil rolling device is provided at the copper foil rolling portion.

[0009] Furthermore, the copper foil rolling device includes a rolling wheel, which forms a rolling force on the center position of the horizontal straight single-sided tape.

[0010] Furthermore, the tape edge folding portion includes a first folding portion and a second folding portion; a linear groove is provided on the tape folding platform of the first folding portion along the extending direction of the horizontal straight single-sided tape; the linear groove is centered and parallel to the lower side of the horizontal straight single-sided tape;

[0011] A folding roller wheel is provided above the linear groove, and the axis of the folding roller wheel is horizontal and perpendicular to the length direction of the linear groove; the folding roller wheel can move downward until it is rolled in the linear groove, and the folding roller wheel is rotatably installed on the moving bracket through a bearing, and the driving device can drive the moving bracket to perform lifting and displacement along the length direction of the linear groove; the wheel width of the folding roller wheel is consistent with the groove bottom width of the linear groove; the left and right sides of the horizontal linear single-sided tape on the tape folding platform of the second folding part are respectively provided with a first folding push strip and a second folding push strip in parallel, and the first folding push strip and the second folding push strip can move towards and away from each other.

[0012] Furthermore, the folding tape rolling portion includes an upper rolling wheel and a lower rolling wheel distributed up and down.

[0013] In the process of the adhesive folding process system for adhesive-backed copper foil, the tape storage roll leading-out portion leads out a horizontal straight single-sided tape with the adhesive surface facing upward at a predetermined rhythm, and at the same time, the folded copper foil tape reeling portion performs a reeling and storage action at a corresponding rhythm, so that any local section of the horizontal straight single-sided tape led out from the tape storage roll leading-out portion passes through the copper foil sheet pasting portion for attaching rectangular copper foil, the tape edge cutting portion for cutting a cutting seam, the copper foil sheet rolling portion for receiving and rolling, the tape edge folding portion for folding, and the folded copper foil rolling portion for receiving and rolling again, and finally is reeled and stored by the folded copper foil tape reeling portion;

[0014] Finally, the folded copper foil tape is rolled up and stored by the winding device of the folded copper foil tape winding unit. The folded copper foil tape rolled up and stored by the winding device of the folded copper foil tape winding unit has a plurality of cut marks evenly distributed along the length direction.

[0015] When the target copper foil adhesive tape needs to be taken, the folded copper foil tape stored in the winding device of the folded copper foil tape winding part is cut along a plurality of cut marks to obtain a plurality of target copper foil adhesive tapes.

[0016] The transformer to which the copper foil tape obtained by the process of the adhesive-backed copper foil folding process system is applied includes an assembly structure of an IE type transformer iron core and a coil frame with a wound coil. The target copper foil adhesive is tied and wrapped around the assembly structure of the IE type transformer iron core and the coil frame with a wound coil with the cooperation of an adhesive, thereby covering the coil outside the coil frame.

[0017] Beneficial effects: The present invention provides a process system for continuously producing and storing such adhesive-backed copper foil, wherein the folded copper foil-containing tape is finally rolled up and stored by the winding device of the folded copper foil tape winding section, and the folded copper foil-containing tape rolled up and stored by the winding device of the folded copper foil tape winding section has a number of cut marks evenly distributed along the length direction; when the target copper foil adhesive backing needs to be taken, the folded copper foil-containing tape rolled up and stored by the winding device of the folded copper foil tape winding section is cut along the number of cut marks to obtain a number of target copper foil adhesive backing tapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the target copper foil adhesive structure;

[0019] Figure 2 This is a schematic diagram of the copper foil backing tape wrapped around the EI transformer;

[0020] Figure 3 This is an overall schematic diagram of the adhesive-backed copper foil folding process system;

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of the front part;

[0022] Figure 5 This is a schematic diagram of the tape folding platform surface after the horizontal straight line single-sided tape is hidden;

[0023] Figure 6 A schematic diagram of a rectangular copper foil following a horizontal linear single-sided tape to the first fold of the tape edge without sinking into the linear groove;

[0024] Figure 7 This is a schematic diagram of a rectangular copper foil moving along a horizontal linear single-sided tape to the first folded portion of the tape edge and sinking downward into a linear groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As attached Figures 1 to 7 The adhesive folding process system of the adhesive-backed copper foil shown includes, in sequence along the horizontal straight line direction, a tape storage roll lead-out portion 6, a copper foil pasting portion 5, a tape edge cutting portion 71, a copper foil rolling portion 4, a tape edge folding portion 3, a folded tape rolling portion 2 and a folded copper foil tape winding portion 1.

[0027] like Figure 3 As shown, the horizontal straight line single-sided tape 9a with the adhesive surface facing upwards, which is drawn out from the tape storage roll of the tape storage roll lead-out portion 6, passes through the copper foil pasting portion 5, the tape edge cutting portion 71, the copper foil rolling portion 4, the tape edge folding portion 3 and the folded tape rolling portion 2 in the horizontal straight line direction in sequence, and is finally rolled up and stored by the winding device of the folded copper foil tape winding portion 1; a tape guiding platform 74 is provided along the length direction at the copper foil pasting portion 5 and the tape edge cutting portion 71, and the horizontal straight line single-sided tape 9a is on the upper surface of the tape guiding platform 74; a robot or manual pasting station is provided at the copper foil pasting portion 5, which can center the rectangular copper foil 8 on the upper surface of the horizontal straight line single-sided tape 9a; the width of the rectangular copper foil 8 is smaller than the width of the horizontal straight line single-sided tape 9a;

[0028] A knife holder 10 is disposed directly above the horizontal straight single-sided tape 9a at the tape edge cutting portion 71, and is capable of lifting and lowering movement. Two downwardly directed cutting knives 11 are symmetrically disposed at the lower portion of the knife holder 10. The spacing between the two cutting knives 11 is exactly the same as the width of the rectangular copper foil 8. As the knife holder 10 descends, the two cutting knives 11 symmetrically cut two slits 26 perpendicular to the length of the horizontal straight single-sided tape 9a at the two edges of the horizontal straight single-sided tape 9a.

[0029] The tape edge folding portion 3 is provided with a tape folding platform 36, which is horizontally connected to the tape guiding platform 74; the copper foil rolling portion 4 is at the connection between the tape folding platform 36 and the tape guiding platform 74; the copper foil rolling portion 4 is provided with a copper foil rolling device 12.

[0030] like Figure 4 As shown, the copper foil rolling device 12 includes a base 17 fixedly mounted on the tape folding platform 36, a lever 22, a spring 19 and a rolling wheel 25. A horizontal lever shaft 23 is fixedly connected to the base 17 through a fixing member 18. The middle part of the lever 22 is rotatably mounted on the lever shaft 23 through a bearing. The axis of the rolling wheel 25 is horizontal and perpendicular to the length of the horizontal straight single-sided tape 9a; the rolling wheel 25 is rotatably mounted on the oblique lower end of the lever 22; the oblique upper end of the lever 22 is vertically fixedly connected to a horizontal connecting rod 21; a first spring connecting portion 24 is provided on one side of the base 17, and the end of the connecting rod 21 is provided with a spring connecting portion 24. There is a second spring connecting part 20; the originally straight spring 19 is bent into an upward convex arc shape, and the two ends of the spring 19 are fixedly connected to the first spring connecting part 24 and the second spring connecting part 20 respectively. The restoring force of the spring 19 bent in an arc shape acts upward on the upper oblique end of the lever 22 under the transmission of the connecting rod 21, so that the rolling wheel 25 at the lower oblique end of the lever 22 forms a rolling force on the center position of the horizontal straight single-sided tape 9a, and the wheel surface width of the rolling wheel 25 is consistent with the width of the rectangular copper foil 8; the wheel surface of the rolling wheel 25 in this case has a layer of silicone oil release film to prevent adhesion.

[0031] like Figure 3 The folding portion 3 of the tape edge includes a first folding portion 3a and a second folding portion 3b; Figure 5 A linear groove 33 is provided on the tape folding platform 36 of the first folding portion 3a along the extending direction of the horizontal straight single-sided tape 9a. The length of the linear groove 33 is greater than the length of the target copper foil backing tape 9c. The bottom width of the linear groove 33 is consistent with the width of the rectangular copper foil 8. Assuming that the groove depth of the linear groove 33 is h, the width of the horizontal straight single-sided tape 9a is L1, and the width of the rectangular copper foil 8 is L2, h = L1-L2 / 2 is satisfied. The linear groove 33 is centered and parallel to the lower side of the horizontal straight single-sided tape 9a. The inner wall surfaces 33a at both ends of the linear groove 33 are transition slopes that are 40° to 60° with the horizontal plane. The two ends of the linear groove 33 are inclined planes. The side inner wall surface 33b is a steep slope at an angle of 85° to 88° to the horizontal plane; a folding roller wheel 25 is provided above the linear groove 33, and the axis of the folding roller wheel 25 is horizontal and perpendicular to the length direction of the linear groove 33; the folding roller wheel 25 can move downward until it is rolled into the linear groove 33, and the folding roller wheel 25 is rotatably mounted on the moving bracket 13 through a bearing, and the driving device can drive the moving bracket 13 to move up and down and move along the length direction of the linear groove 33; the wheel width of the folding roller wheel 25 is consistent with the groove bottom width of the linear groove 33; the wheel surface and side surfaces of the folding roller wheel 25 are both provided with a layer of silicone oil release film to prevent adhesion.

[0032] A first folding push strip 15 and a second folding push strip 16 are respectively arranged in parallel on the left and right sides of the horizontal straight single-sided tape 9a on the tape folding platform 36 of the second folding portion 3b, and the distance between the lower surface of the first folding push strip 15 and the second folding push strip 16 and the upper surface of the tape folding platform 36 is just twice the thickness of the horizontal straight single-sided tape 9a; the first folding push strip 15 and the second folding push strip 16 are vertically connected to the side away from each other by a first horizontal telescopic push rod 63a and a second telescopic push rod 63b; driven by the first telescopic push rod 63a and the second telescopic push rod 63b, the first folding push strip 15 and the second folding push strip 16 move towards and away from each other.

[0033] The horizontal straight single-sided tape 9a at the folded tape rolling part 2 and the folded copper foil tape winding part 1 is a folded copper foil tape 9b. The folded tape rolling part 2 includes an upper rolling wheel 7a and a lower rolling wheel 7b distributed up and down. The upper rolling wheel 7a and the lower rolling wheel 7b clamp the upper and lower sides of the folded copper foil tape 9b.

[0034] Process and working principle:

[0035] like Figure 3The tape storage roll leading-out portion 6 draws out the horizontal straight single-sided tape 9a with the adhesive surface facing upward at a predetermined rhythm. At the same time, the folded copper foil tape reeling portion 1 performs a reeling and storing action at a corresponding rhythm, so that any local section of the horizontal straight single-sided tape 9a drawn out from the tape storage roll leading-out portion 6 passes through the copper foil pasting portion 5, the tape edge cutting portion 71, the copper foil rolling portion 4, the tape edge folding portion 3 and the folded tape rolling portion 2 in sequence along its own extension direction, and is finally reeled and stored by the folded copper foil tape reeling portion 1;

[0036] When a partial section of the horizontal straight single-sided tape 9a reaches the copper foil pasting section 5, the robot or manual station at the copper foil pasting section 5 pastes a rectangular copper foil 8 on the upper surface of the horizontal straight single-sided tape 9a in the center. Then the rectangular copper foil 8 moves synchronously with the partial section of the horizontal straight single-sided tape 9a.

[0037] As the rectangular copper foil 8 follows the horizontal straight single-sided tape 9a and passes through the tape edge cutting portion 71, the front and rear sides of the rectangular copper foil 8 sequentially pass directly under the knife holder 10. When the front and rear sides of the rectangular copper foil 8 pass directly under the knife holder 10, the knife holder 10 is controlled to drive the two cutters 11 downward to perform a cutting action; thereby, two symmetrical cutting seams 26 perpendicular to the length direction of the horizontal straight single-sided tape 9a are cut on both edges of the front and rear sides of the rectangular copper foil 8.

[0038] When the rectangular copper foil 8 moves along the horizontal straight line single-sided tape 9a to the copper foil sheet rolling portion 4, the rolling wheel 25 rolls the rectangular copper foil 8 in the center, so that the rectangular copper foil 8 is more tightly bonded to the surface of the horizontal straight line single-sided tape 9a;

[0039] When the rectangular copper foil 8 moves along with the horizontal straight line single-sided tape 9a to the first folding portion 3a of the tape edge folding portion 3, as shown in FIG. Figure 6 The folding roller 25 is moved downwards to contact the surface of the rectangular copper foil 8, and the lower part of the folding roller 25 is stuck in the linear groove 33, and then the moving bracket 13 is displaced forwards and backwards to make the folding roller 25 roll forward and backwards along the length direction of the linear groove 33, so that any position of the rectangular copper foil 8 is rolled to the bottom of the linear groove 33, and the horizontal straight single-sided tape 9a on the left and right sides of the rectangular copper foil 8 is folded upwards under the constraint of the inner wall surfaces 33b on both sides of the linear groove 33 to form a left symmetrical vertical folded tape piece 40a and a right folded tape piece 40b. Figure 7; Then the motion bracket 13 drives the folding roller 25 to move upward to disengage the linear groove 33; then the tape storage roll lead-out portion 6 and the folding copper foil tape rewinding portion 1 continue to be executed;

[0040] When the rectangular copper foil 8 moves along the horizontal straight line single-sided adhesive tape 9a to the second folding portion 3b of the tape edge folding portion 3, the first telescopic push rod 63a is first controlled to extend, driving the first folding push bar 15 to move close to the second folding push bar 16, so that the first folding push bar 15 pushes the left folding adhesive tape piece 40a to fold downward toward one side of the rectangular copper foil 8 until the adhesive surface of the left folding adhesive tape piece 40a is parallel to and adhered to the upper surface of the rectangular copper foil 8. Then, the first telescopic push rod 63a is immediately controlled to retract and drive the left folding adhesive tape piece 40a to the initial position; then the second telescopic push rod 63b is controlled to extend, driving the second telescopic push rod 63a to move downward. The second folding push bar 16 moves closer to the first folding push bar 15, so that the second folding push bar 16 pushes the right folding tape piece 40b to be folded downward toward one side of the rectangular copper foil 8 until the adhesive surface of the right folding tape piece 40b is parallel and adhered to the upper surface of the rectangular copper foil 8. Then, the second telescopic push rod 63b is immediately controlled to retract and drive the right folding tape piece 40b to the initial position; at this time, the folding and bonding process of the left folding tape piece 40a and the right folding tape piece 40b is completed, and the horizontal straight line single-sided tape 9a at the second folding portion 3b of the tape edge folding portion 3 becomes the folded copper foil-containing tape 9b;

[0041] Subsequently, the folded copper foil tape 9b continues to run along its own extension direction toward the folded copper foil tape reeling portion 1. When the folded copper foil tape 9b passes through the folded tape rolling portion 2, the folded copper foil tape 9b is clamped by the upper rolling wheel 7a and the lower rolling wheel 7b, so that the left folded tape piece 40a and the right folded tape piece 40b on the folded copper foil tape 9b are more tightly adhered to the upper surface of the rectangular copper foil 8.

[0042] Finally, the folded copper foil tape 9b is rolled up and stored by the winding device of the folded copper foil tape winding unit 1. The folded copper foil tape 9b rolled up and stored by the winding device of the folded copper foil tape winding unit 1 has a plurality of cut marks 26a distributed evenly along the length direction.

[0043] When the target copper foil adhesive tape 9c is needed, the folded copper foil tape 9b stored by the winding device of the folded copper foil tape winding unit 1 is cut along the plurality of cutting marks 26a to obtain a plurality of target copper foil adhesive tapes 9c.

[0044] The transformer to which the copper foil tape of the adhesive-backed copper foil folding process system is applied includes an assembly structure of an IE type transformer core 50 and a coil frame 51 on which a coil has been wound. The target copper foil adhesive 9c is tied around the outside of the assembly structure of the IE type transformer core 50 and the coil frame 51 on which a coil has been wound with the cooperation of an adhesive, thereby wrapping the coil outside the coil frame 51 and playing an electromagnetic shielding role.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. The adhesive folding process system of adhesive-backed copper foil is characterized by: It comprises a tape storage roll lead-out portion (6), a copper foil pasting portion (5), a tape edge cutting portion (71), a copper foil rolling portion (4), a tape edge folding portion (3), a folded tape rolling portion (2) and a folded copper foil tape rewinding portion (1); The horizontal straight line single-sided tape (9a) with the adhesive surface facing upwards drawn out from the tape storage roll of the tape storage roll drawing portion (6) passes through the copper foil pasting portion (5), the tape edge cutting portion (71), the copper foil rolling portion (4), the tape edge folding portion (3) and the folded tape rolling portion (2) in the horizontal straight line direction and is finally rolled up and stored by the winding device of the folded copper foil tape winding portion (1); A knife holder (10) capable of lifting and lowering is provided above the horizontal straight single-sided tape (9a) at the tape edge cutting portion (71), and two cutting knives (11) with sharp ends facing downward are symmetrically provided at the lower portion of the knife holder (10). When the knife holder (10) is lowered, the two cutting knives (11) can symmetrically cut two cutting seams (26) perpendicular to the length direction of the horizontal straight single-sided tape (9a) at the two edges of the horizontal straight single-sided tape (9a); The tape edge folding portion (3) is provided with a tape folding platform (36), and the tape folding platform (36) is horizontally connected to the tape guide platform (74); the copper foil rolling portion (4) is located at the connection between the tape folding platform (36) and the tape guide platform (74); the copper foil rolling device (12) is provided at the copper foil rolling portion (4); The tape edge folding portion (3) comprises a first folding portion (3a) and a second folding portion (3b); a linear groove (33) is provided on the tape folding platform (36) of the first folding portion (3a) along the extension direction of the horizontal straight single-sided tape (9a); the linear groove (33) is centered and parallel to the lower side of the horizontal straight single-sided tape (9a); A folding roller (25) is provided above the linear groove (33), and the axis of the folding roller (25) is horizontal and perpendicular to the length direction of the linear groove (33); the folding roller (25) can move downward until it is rolled into the linear groove (33), and the folding roller (25) is rotatably mounted on the motion bracket (13) through a bearing, and the driving device can drive the motion bracket (13) to move up and down and move along the length direction of the linear groove (33); the wheel width of the folding roller (25) is The width of the bottom of the linear groove (33) is consistent with that of the bottom of the linear groove (33); a first folding push strip (15) and a second folding push strip (16) are respectively provided in parallel on the left and right sides of the horizontal linear single-sided tape (9a) on the tape folding platform (36) of the second folding portion (3b), and the first folding push strip (15) and the second folding push strip (16) can move toward and away from each other; the inner wall surfaces (33b) on both sides of the linear groove (33) are steep slopes that form an angle of 85° to 88° with the horizontal plane.

2. The adhesive-backed copper foil folding process system according to claim 1, characterized in that: A tape guide platform (74) is provided at the copper foil pasting portion (5) and the tape edge cutting portion (71) along the length direction, and the horizontal straight line single-sided tape (9a) is on the upper surface of the tape guide platform (74); a robot or a manual pasting station is provided at the copper foil pasting portion (5) that can center-paste the rectangular copper foil (8) on the upper surface of the horizontal straight line single-sided tape (9a).

3. The adhesive-backed copper foil folding process system according to claim 2, characterized in that: The copper foil rolling device (12) comprises a folding rolling wheel (25), and the folding rolling wheel (25) forms a rolling pressure on the center position of the horizontal straight line single-sided adhesive tape (9a).

4. The adhesive-backed copper foil folding process system according to claim 3, characterized in that: The folding tape rolling portion (2) comprises an upper rolling wheel (7a) and a lower rolling wheel (7b) distributed up and down.

5. The adhesive-backed copper foil folding process system according to claim 4, characterized in that: The tape storage roll of the tape storage roll lead-out section (6) leads out a horizontal straight line single-sided tape (9a) with the adhesive surface facing upward at a predetermined rhythm, and at the same time, the folded copper foil tape reeling section (1) performs a reeling and storage action at a corresponding rhythm, so that any local section of the horizontal straight line single-sided tape (9a) led out from the tape storage roll lead-out section (6) passes through the copper foil sheet pasting section (5) to adhere the rectangular copper foil (8), the tape edge cutting section (71) to cut out the cutting seam (26), the copper foil sheet rolling section (4) to receive the rolling, the tape edge folding section (3) to perform the folding, and the folded tape rolling section (2) to receive the rolling again, and is finally rolled and stored by the folded copper foil tape reeling section (1); Finally, the folded copper foil tape (9b) is rolled up and stored by the reeling device of the folded copper foil tape reeling unit (1), and the folded copper foil tape (9b) rolled up and stored by the reeling device of the folded copper foil tape reeling unit (1) has a plurality of cut marks (26a) distributed equidistantly along the length direction; When the target copper foil adhesive (9c) needs to be taken, the folded copper foil tape (9b) stored and rolled up by the reeling device of the folded copper foil tape reeling section (1) is cut along the plurality of cut marks (26a) to obtain a plurality of target copper foil adhesives (9c).

6. A transformer, characterized in that: The adhesive-backed copper foil folding process system according to claim 5 comprises an assembly structure of an IE type transformer core (50) and a coil frame (51) on which a coil has been wound, wherein the target copper foil adhesive (9c) is wrapped around the outside of the assembly structure of the IE type transformer core (50) and the coil frame (51) on which a coil has been wound with the help of an adhesive, thereby enclosing the coil outside the coil frame (51).

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