Copper foil unwinding device

Abstract

This utility model provides a copper foil unwinding device. The purpose is to solve the technical problem of wrinkles easily forming during copper foil unwinding and cutting due to insufficient tension. The technical solution adopted is: a copper foil unwinding device, including: an unwinding roller, a first motor driving the unwinding roller to rotate, a counterweight roller located downstream of the unwinding roller, a first guide roller located between the unwinding roller and the counterweight roller, and a second guide roller located downstream of the counterweight roller; wherein, each end of the counterweight roller is equipped with a first bearing and adapted to a limiting mechanism; the limiting mechanism has an upwardly extending limiting channel; the first bearing is slidably positioned vertically within the limiting channel of the corresponding limiting mechanism. This utility model can keep the copper foil taut, avoiding wrinkles during unwinding; and has the advantages of simple structure and low cost.

Description

Technical Field

[0001] This utility model relates to the field of unwinding equipment technology, specifically to a copper foil unwinding device. Background Technology

[0002] In the production of copper-clad laminates, copper foil and prepreg are rolled out separately and cut. The cut copper foil and prepreg are then stacked and sent to a laminating machine for hot pressing to produce the prepreg.

[0003] The downstream cutting device has a traction mechanism that pauses when cutting copper foil; while the upstream unwinding device usually unwinds copper foil at a constant speed. This can cause the copper foil to be unable to be taut, which can easily lead to wrinkles in the unwound copper foil and thus have an adverse effect on the quality of the copper-clad laminate produced later. Summary of the Invention

[0004] The purpose of this invention is to provide a copper foil unwinding device that can keep the copper foil taut and prevent wrinkles from forming during unwinding; it also has the advantages of simple structure and low cost.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A copper foil unwinding device includes: an unwinding roller, a first motor that drives the unwinding roller to rotate, a counterweight roller located downstream of the unwinding roller, a first guide roller located between the unwinding roller and the counterweight roller, and a second guide roller located downstream of the counterweight roller; wherein, a first bearing is installed at each end of the counterweight roller and is adapted to a limiting mechanism; the limiting mechanism has an upwardly extending limiting channel; the first bearing is slidably limited in the limiting channel of the corresponding limiting mechanism.

[0007] Optionally, the limiting mechanism includes two limiting members extending in the vertical direction; the two limiting members are provided with limiting grooves on opposite sides to form a limiting channel that limits the first bearing.

[0008] Optionally, the limiting mechanism further includes: a first connecting member that connects the bottom ends of the two limiting members; the bottom end of the limiting member is provided with a first ear extending away from the limiting groove, so as to be connected to the first connecting member by bolts.

[0009] Optionally, the limiting mechanism further includes: a second connecting member that connects the top ends of the two limiting members; the top end of the limiting member is provided with a second ear extending away from the limiting groove, so as to be connected to the second connecting member by bolts.

[0010] Optionally, it also includes: an unwinding frame for mounting the unwinding roller; the unwinding frame includes: a main shaft parallel to the unwinding roller and ribs connected to both ends of the main shaft; the unwinding frame is provided with a rotary joint on the rib for connecting the unwinding roller; the first motor drives the unwinding roller to rotate by driving the rotary joint to rotate.

[0011] Optionally, the unwinding frame is provided with two sets of rotary joints, which are rotationally symmetrical about the main shaft; each set of rotary joints includes two rotary joints correspondingly distributed on the two ribs; each set of rotary joints is adapted to a first motor; the unwinding frame is adapted to a second motor that drives it to rotate back and forth around the main shaft.

[0012] Optionally, the rib plate has a rotating shaft fixedly connected to the side facing away from the main shaft; the rotating shaft is coaxial with the main shaft and is rotatably connected to the bracket through a second bearing.

[0013] The working principle of this invention is as follows: This unwinding device is typically used in conjunction with a downstream cutting device. A first motor drives the unwinding roller to rotate, allowing for continuous and uniform unwinding of the copper foil. When the downstream cutting device cuts the copper foil and its traction mechanism pauses, the counterweight roller, under its own weight, slides downwards along the limiting channel of the limiting mechanism, thus keeping the unwound copper foil taut. When the downstream cutting device completes a cut and its traction mechanism resumes traction, the cutting device's traction mechanism pulls the copper foil faster, while the unwinding device unwinds it more slowly. This shortens the length of the copper foil between the unwinding roller and the traction mechanism, causing the counterweight roller to lift upwards and slide upwards along the limiting channel of the limiting mechanism. Thus, when the downstream cutting device performs the next cut, the counterweight roller can slide downwards again along the limiting channel of the limiting mechanism, keeping the unwound copper foil taut.

[0014] Therefore, the beneficial effects of this utility model are: it can keep the copper foil taut and prevent wrinkles from forming when the copper foil is unwound; and it has the advantages of simple structure and low cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the unwinding of the copper foil according to this utility model;

[0018] Figure 3 This is an assembly diagram of the limit mechanism.

[0019] Reference numerals in the attached drawings: 1. Unwinding roller; 2. First motor; 3. Counterweight roller; 4. First guide roller; 5. Second guide roller; 6. First bearing; 7. Limiting channel; 8. Limiting component; 9. Limiting groove; 10. First connecting component; 11. First ear; 12. Second connecting component; 13. Second ear; 14. Main shaft; 15. Rib plate; 16. Second motor; 17. Rotary joint; 18. Bracket. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0021] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0024] The following is in conjunction with the appendix Figure 1 ~Attached Figure 3 The embodiments of this utility model will be described in detail below.

[0025] This utility model provides a copper foil unwinding device. The copper foil unwinding device includes: an unwinding roller 1, a first motor 2 driving the unwinding roller 1 to rotate, a counterweight roller 3 located downstream of the unwinding roller 1, a first guide roller 4 located between the unwinding roller 1 and the counterweight roller 3, and a second guide roller 5 located downstream of the counterweight roller 3. It should be understood that, depending on actual needs, one or more first guide rollers 4 and one or more second guide rollers 5 can be provided; the first guide roller 4 and the second guide roller 5 can each be rotatably mounted on a roller frame via a third bearing. The copper foil unwound from the unwinding roller 1 passes under the counterweight roller 3 and supports it. First bearings 6 are respectively installed at both ends of the counterweight roller 3 and are adapted to a limiting mechanism. The limiting mechanism has an upwardly extending limiting channel 7. The first bearing 6 can slide up and down within the limiting channel 7 of the corresponding limiting mechanism.

[0026] The specific implementation of this utility model is described below: This unwinding device is usually used in conjunction with a downstream cutting device. The first motor 2 drives the unwinding roller 1 to rotate, thus continuously and uniformly unwinding the copper foil. When the downstream cutting device cuts the copper foil and its traction mechanism pauses traction, the counterweight roller 3, under its own weight, slides downwards along the limiting channel 7 of the limiting mechanism, thereby keeping the copper foil continuously unwound by the unwinding roller 1 taut. When the downstream cutting device completes a cut and its traction mechanism resumes traction, the traction mechanism of the cutting device pulls the copper foil faster, while the unwinding device unwinds the copper foil slower. The length of the copper foil between the unwinding roller 1 and the traction mechanism shortens, and the copper foil lifts the counterweight roller 3 upwards, causing it to slide upwards along the limiting channel 7 of the limiting mechanism. Thus, when the downstream cutting device performs the next cut, the counterweight roller 3 can slide downwards again along the limiting channel 7 of the limiting mechanism, keeping the unwound copper foil taut. This invention can keep the copper foil taut, preventing wrinkles from forming during unwinding; it also has the advantages of simple structure and low cost.

[0027] Furthermore, the limiting mechanism includes two limiting members 8 extending in the vertical direction; the two limiting members 8 are provided with limiting grooves 9 on opposite sides to form a limiting channel 7 that limits the first bearing 6. It should be understood that the outer ring of the first bearing 6 is limited within the limiting grooves 9 of the two limiting members 8.

[0028] Furthermore, the limiting mechanism also includes a first connecting member 10 that connects the bottom ends of the two limiting members 8; the bottom end of the limiting member 8 is provided with a first ear 11 extending away from the limiting groove 9, so as to be connected to the first connecting member 10 by bolts.

[0029] Furthermore, the limiting mechanism also includes a second connecting member 12 that connects the top ends of the two limiting members 8; the top end of each limiting member 8 is provided with a second ear 13 extending away from the limiting groove 9, so as to be connected to the second connecting member 12 by bolts. It should be understood that the aforementioned structure can ensure the strength of the limiting mechanism; at the same time, it also makes the limiting mechanism easy to disassemble and assemble, and more convenient for later maintenance.

[0030] Furthermore, it also includes: an unwinding frame for mounting the unwinding roller 1; the unwinding frame includes: a main shaft 14 parallel to the unwinding roller 1, and ribs 15 connected to both ends of the main shaft 14; the unwinding frame has a rotary joint 17 for connecting the unwinding roller 1 on the ribs 15; the first motor 2 drives the unwinding roller 1 to rotate by driving the rotary joint 17 to rotate. It should be understood that the rotary joint 17 can be rotatably mounted on the unwinding frame via a fourth bearing. The rotary joint 17 is detachably connected to the unwinding roller 1 and can rotate synchronously with the unwinding roller 1 under the drive of the first motor 2; the connection method between the rotary joint 17 and the unwinding roller 1 can refer to the prior art, and there are various methods, which will not be described in detail here.

[0031] Furthermore, the unwinding frame is provided with two sets of rotary joints 17, which are rotationally symmetrical about the main shaft 14. Each set of rotary joints 17 includes two rotary joints 17 correspondingly distributed on the two ribs 15. Each set of rotary joints 17 is adapted to a first motor 2. The unwinding frame is adapted to a second motor 16 that drives it to rotate back and forth around the main shaft 14. It should be understood that when the unwinding roller 1 installed on one set of rotary joints 17 is performing the copper foil unwinding operation, a new copper foil to be unwound can be replaced on the unwinding roller 1 of the other set of rotary joints 17. In this way, the two do not interfere with each other, which is beneficial to improving production efficiency. The second motor 16 can exchange the positions of the two unwinding rollers 1 by driving the unwinding frame to rotate back and forth.

[0032] Furthermore, the rib plate 15 has a rotating shaft fixedly connected to the side facing away from the main shaft 14; the rotating shaft is coaxial with the main shaft 14 and is rotatably connected to the bracket 18 through a second bearing.

[0033] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the protection scope of the present invention.

Claims

1. A copper foil unwinding device, characterized in that, include: Unwinding roller (1); and The first motor (2) drives the unwinding roller (1) to rotate; and A counterweight roller (3) is located downstream of the unwinding roller (1); and A first guide roller (4) is disposed between the unwinding roller (1) and the counterweight roller (3); and A second guide roller (5) is located downstream of the counterweight roller (3); in, The counterweight roller (3) is equipped with a first bearing (6) at both ends and is adapted to a limiting mechanism; The limiting mechanism is provided with an upwardly extending limiting channel (7); The first bearing (6) can slide up and down and is limited to the limiting channel (7) of the corresponding limiting mechanism.

2. The copper foil unwinding device according to claim 1, characterized in that: The limiting mechanism includes two limiting members (8) extending in the vertical direction; The two limiting members (8) are provided with limiting grooves (9) on opposite sides to form a limiting channel (7) that limits the first bearing (6).

3. The copper foil unwinding device according to claim 2, characterized in that: The limiting mechanism further includes: a first connecting member (10) that connects the bottom ends of the two limiting members (8); The bottom end of the limiting member (8) is provided with a first ear (11) extending away from the limiting groove (9) to form a connection with the first connecting member (10) by bolts.

4. The copper foil unwinding device according to claim 3, characterized in that: The limiting mechanism further includes a second connecting member (12) that connects the top ends of the two limiting members (8); The top end of the limiting member (8) is provided with a second ear (13) extending away from the limiting groove (9) to form a connection with the second connector (12) by bolts.

5. The copper foil unwinding device according to any one of claims 1 to 4, characterized in that: It also includes: an unwinding frame for mounting the unwinding roll (1); The unwinding frame includes: a main shaft (14) parallel to the unwinding roller (1) and ribs (15) connected to both ends of the main shaft (14); The unwinding frame is provided with a rotary joint (17) on the rib (15) for connecting the unwinding roller (1); The first motor (2) drives the rotary joint (17) to rotate, thereby driving the unwinding roller (1) to rotate.

6. The copper foil unwinding device according to claim 5, characterized in that: The unwinding frame is provided with two sets of rotary joints (17), which are rotationally symmetrical about the main shaft (14). Each set of rotary joints (17) includes two rotary joints (17) corresponding to the two ribs (15); Each set of rotary joints (17) is adapted to a first motor (2); The unwinding frame is adapted to a second motor (16) that drives it to rotate back and forth around the main shaft (14).

7. The copper foil unwinding device according to claim 6, characterized in that: The rib (15) has a rotating shaft fixed to the side facing away from the main shaft (14); The rotating shaft is coaxial with the main shaft (14) and is rotatably connected to the bracket (18) through the second bearing.

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