Large vacuum-pumping rewinding machine

Abstract

The utility model provides a vacuumizing large rewinding machine, and particularly relates to the field of conductive adhesive film production, the vacuumizing large rewinding machine comprises a box body with a vacuumizing function, the box body is internally provided with an unwinding roller used for unwinding a conductive adhesive film, a buffer roller used for buffering the stress of the conductive adhesive film and a winding roller used for winding the conductive adhesive film, and the two ends of the buffer roller are provided with rotating shafts; the rotating shaft is sleeved with a rolling bearing. Fixing cavities with upper openings and side holes are symmetrically formed in the side walls of the box body; a fixing device is arranged in the fixing cavity; the rolling bearing is connected with the fixing device; a first buffer plate and a second buffer plate are respectively arranged on the upper and lower sides of the fixing device; buffer springs are arranged among the first buffer plate, the second buffer plate and the fixing device; and positioning grooves are formed in the first buffer plate, the second buffer plate and the fixing device, and the two ends of the buffer spring are embedded into the positioning grooves correspondingly. According to the utility model, the problem of non-uniform stress at two ends of the vacuum-pumping rewinding machine during rewinding operation can be solved, and the quality of a conductive adhesive film is further improved.

Description

Technical Field

[0001] The utility model belongs to the field of conductive adhesive film production, and particularly relates to a large rewinder with vacuum pumping. Background Art

[0002] A conductive adhesive film is a functional material with adhesion, conductivity, and insulation properties. It can be formed by die-cutting or laser cutting, and has high peel strength, excellent conductivity, and electromagnetic shielding effectiveness. Conductive adhesive films are widely used in scenarios such as conductive connections between metals on the PCB backplane and connections between FPC grounding metal reinforcements. During the production of conductive adhesive films, a rewinding operation is required. Existing rewinding machines are generally vacuum-pumping rewinding machines to reduce moisture and solvent residues. Although existing vacuum-pumping rewinding machines can improve the problem of moisture and solvent residues, there are still the following drawbacks:

[0003] The interior of a vacuum-pumping rewinding machine generally includes an unwinding roller, a buffer roller, and a winding roller. The conductive adhesive film passes through the unwinding roller, through the buffer roller, and then is wound by the winding roller. Among them, the buffer roller can balance the pulling force of the conductive adhesive film and ensure the flatness of the conductive adhesive film. However, the position of the existing buffer roller is fixed. Once the two ends of the conductive adhesive film are unevenly stressed, it will cause the conductive adhesive film and affect the quality of the conductive adhesive film.

[0004] The patent with the application number CN2018116183674 discloses a small rewinder with heating and vacuum pumping. Compared with traditional rewinding machines, this device can perform heating and vacuum pumping while rewinding, making the curing effect of the tape or diaphragm coating better, and at the same time greatly reducing moisture and residual solvents, which can meet the requirements of high-nickel power batteries for tapes and diaphragms. However, the position of its transition roller (equivalent to the buffer roller) is fixed and cannot cope with the situation where the two ends of the conductive adhesive film are unevenly stressed.

[0005] In view of the above deficiencies, there is a need for a large rewinder with vacuum pumping, which can improve the problem of uneven stress at both ends during the rewinding operation of the vacuum-pumping rewinder, thereby improving the quality of the conductive adhesive film. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a large rewinder with vacuum pumping, which can improve the problem of uneven stress at both ends during the rewinding operation of the vacuum-pumping rewinder, thereby improving the quality of the conductive adhesive film.

[0007] The utility model provides the following technical solutions:

[0008] A large rewinder with a vacuum pumping function, comprising a box body with a vacuum pumping function. Inside the box body, there are a unwinding roller for unwinding the conductive adhesive film, a buffer roller for buffering the force on the conductive adhesive film, and a winding roller for winding the conductive adhesive film. The two ends of the buffer roller are provided with rotating shafts, and rolling bearings are sleeved on the rotating shafts;

[0009] On the side walls of the box body, fixed cavities with upper openings and side openings are symmetrically provided; a fixing device is arranged inside the fixed cavities; the rolling bearing is connected to the fixing device; a first buffer plate and a second buffer plate are respectively arranged on the upper and lower sides of the fixing device;

[0010] Buffer springs are arranged between the first buffer plate, the second buffer plate and the fixing device; and positioning grooves are provided on the first buffer plate, the second buffer plate and the fixing device, and the two ends of the buffer spring are respectively embedded in the positioning grooves of the first buffer plate, the second buffer plate and the fixing device;

[0011] A limit bolt is arranged above the first buffer plate, and the limit bolt penetrates through the side wall of the fixed cavity and is connected to the side wall of the box body to limit the first buffer plate.

[0012] Preferably, the fixing device includes clamping plates arranged on both sides of the rolling bearing, and the middle of the clamping plate is a semi-circular structure, and flat plate structures are connected at both ends of the semi-circular structure of the clamping plate; the clamping plate holds and fixes the rolling bearing;

[0013] It also includes fixing blocks arranged on the upper and lower sides of the clamping plate, and the structure of the fixing block fits with that of the clamping plate; and the fixing block and the clamping plate are connected by bolts; and the positioning groove is arranged on the fixing block;

[0014] Preferably, fixing plates are arranged at both ends of the fixing block. The fixing plate is composed of a vertical plate and a horizontal plate. The horizontal plate is attached to the side part of the fixing block, and the plate surface of the horizontal plate is flush with the side wall of the fixing block; a balance protrusion is arranged on the horizontal plate in the horizontal direction, and the fixing block is provided with a groove structure matching the balance protrusion; the vertical plate and the fixing block are connected by bolts.

[0015] Preferably, a limit protrusion is arranged on the periphery of the rolling bearing, and a limit groove matching the limit protrusion is arranged on the clamping plate;

[0016] Preferably, a buffer layer is arranged between the clamping plate and the fixing block, and the buffer layer is made of rubber material.

[0017] Preferably, the first buffer plate and the second buffer plate have the same structure; the first buffer plate includes a bottom plate, a middle plate and a top plate stacked in sequence; the bottom plate, the middle plate and the top plate are connected by bolts; and the positioning groove is arranged on the bottom plate;

[0018] Preferably, matching stable grooves and stable blocks are respectively arranged at the joints of the bottom plate, the middle plate and the top plate;

[0019] Preferably, a plurality of screw holes are provided in the side walls of the box body and the side walls of the fixed cavity from top to bottom. The limit bolts pass through the screw holes to limit the top plate, and the lower sides of the limit bolts are located in the stable grooves of the top plate.

[0020] Advantages of the present utility model:

[0021] When the two ends of the conductive adhesive film are unevenly stressed during the rewinding operation of the present device, through the buffering action of the buffer spring, the buffer roller can move up and down, thereby balancing the stress at both ends, and then improving the problem that the uneven stress at both ends of the conductive adhesive film affects the quality of the conductive adhesive film;

[0022] The present device can change the height of the buffer roller up and down by stacking the middle plate and the top plate, thereby meeting different operation requirements. Description of the drawings

[0023] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0024] Figure 1 is the overall view of the present device;

[0025] Figure 2 is the exploded view of the present device;

[0026] Figure 3 is the exploded view of the present device;

[0027] The labels in the figure are: 1, side wall of the box body; 2, buffer roller; 3, rotating shaft; 4, fixed cavity; 5, fixing device; 6, first buffer plate; 61, bottom plate; 62, middle plate; 63, top plate; 7, second buffer plate; 8, buffer spring; 9, limit bolt; 10, positioning groove; 11, rolling bearing; 12, clamping plate; 13, buffer layer; 14, fixing plate; 15, limit protrusion; 16, fixing block. Detailed implementation manners Embodiment

[0028] As Figures 1 to 3 , a large rewinder with a vacuum pumping function, including a box body with a vacuum pumping function. Inside the box body, there are a pay-off roll for unwinding the conductive adhesive film, a buffer roller 2 for buffering the stress of the conductive adhesive film, and a take-up roll for winding the conductive adhesive film. The above are all prior arts and will not be elaborated on specifically;

[0029] Both ends of the buffer roller 2 are provided with rotating shafts 3, and rolling bearings 11 are sleeved on the rotating shafts 3. The rotation of the buffer roller 2 can be realized through the cooperation of the rotating shafts 3 and the rolling bearings 11;

[0030] On the side wall 1 of the box body, fixed cavities 4 with upper openings and side openings are symmetrically provided. The fixed cavities 4 are fixed to the side wall 1 of the box body by bolts. The structure of the fixed cavities 4 can be referred to Figure 1 and Figure 2 ; A fixing device 5 is arranged in the fixed cavity 4; The rolling bearing 11 is connected to the fixing device 5; A first buffer plate 6 and a second buffer plate 7 are respectively arranged on the upper and lower sides of the fixing device 5;

[0031] Buffer springs 8 are arranged between the first buffer plate 6, the second buffer plate 7 and the fixing device 5. In order to ensure the smoothness of buffering, 3 buffer springs 8 are provided. Specifically, it can be referred to Figure 3 the setting of; Positioning grooves 10 are provided on the first buffer plate 6, the second buffer plate 7 and the fixing device 5. The two ends of the buffer spring 8 are respectively embedded in the positioning grooves 10 of the first buffer plate 6, the second buffer plate 7 and the fixing device 5 to ensure the stability of the buffer spring 8. To further ensure the free contraction of the buffer spring 8, the diameter of the positioning groove 10 can be slightly larger than the outer diameter of the buffer spring 8; When the two ends of the conductive film are unevenly stressed, through the buffering effect of the buffer spring 8, the buffer roller 2 can move up and down, thereby balancing the forces at both ends, and further improving the problem that the uneven stress at both ends of the conductive film affects the quality of the conductive film; A limit bolt 9 is arranged above the first buffer plate 6. The limit bolt 9 passes through the side wall of the fixed cavity 4 and is connected to the side wall 1 of the box body to limit the first buffer plate 6. The upper part of the first buffer plate 6 can be stabilized by the limit of the limit bolt 9;

[0032] In order to improve the buffering effect and reduce rigid contact, the fixing device 5 includes clamping plates 12 arranged on both sides of the rolling bearing 11, and the middle of the clamping plates 12 is a semi-circular structure. The two ends of the semi-circular structure of the clamping plates 12 are connected with flat structures. The above structure is for the convenience of description. In fact, the clamping plates 12 are integrally formed structures; The clamping plates 12 hold and fix the rolling bearing 11; It also includes fixing blocks 16 arranged on the upper and lower sides of the clamping plates 12. The structure of the fixing blocks 16 fits with that of the clamping plates 12; And the fixing blocks 16 and the clamping plates 12 are connected by bolts; And the positioning groove 10 is arranged on the fixing block 16; For a clearer understanding of the above structure, it can be referred to the appendix Figure 3 ; A buffer layer 13 is arranged between the clamping plates 12 and the fixing blocks 16. The buffer layer 13 can be set by coating process or bonding method; The buffer layer 13 is made of rubber material, thereby reducing rigid contact and improving the buffering effect;

[0033] Both ends of the fixed block 16 are provided with fixing plates 14. The fixing plates 14 are composed of a vertical plate and a horizontal plate. The horizontal plate is attached to the side of the fixed block 14, and the plate surface of the horizontal plate is flush with the side wall of the fixed block 14. The horizontal plate is provided with balance protrusions in the horizontal direction, and the fixed block 16 is provided with a groove structure matching the balance protrusions to prevent the displacement of the fixing plate 14. The vertical plate and the fixed block 16 are connected by bolts. Furthermore, multiple structures of the entire fixing device are fused and fixed together through the fixing plate 14. The bolt connection can adopt countersunk bolts. For details, please refer to the appendix Figure 3 ; A limit protrusion 15 is provided on the periphery of the rolling bearing 11, and a limit groove matching the limit protrusion 15 is provided on the clamping plate 12, thereby improving the stability of the rolling bearing 11. Embodiment

[0034] On the basis of Embodiment 1, as Figures 1 - 3 shown, the structures of the first buffer plate 6 and the second buffer plate 7 are the same. The first buffer plate 6 includes a bottom plate 61, a middle plate 62, and a top plate 63 stacked in sequence. The bottom plate 61, the middle plate 62, and the top plate 63 are connected by bolts. And the positioning groove 10 is arranged on the bottom plate 61. By stacking the middle plate 62 and the top plate 63, the up-and-down height of the buffer roller 2 is changed, thereby meeting different operation requirements. Matching stable grooves and stable blocks are respectively provided at the joints of the bottom plate 61, the middle plate 62, and the top plate 63 to ensure the stability of the combination of the bottom plate 61, the middle plate 62, and the top plate 63. A plurality of screw holes are provided from top to bottom on the side wall 1 of the box body and the side wall of the fixed cavity 4. The limit bolt 9 passes through the screw holes to limit the top plate 63, and the lower side of the limit bolt 9 is located in the stable groove of the top plate 61, thereby limiting the top plate 61.

[0035] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large rewinder for vacuum extraction, characterized in that: It includes a box body with a vacuum pumping function. Inside the box body, there are an unwinding roller for unwinding the conductive adhesive film, a buffer roller for buffering the force on the conductive adhesive film, and a winding roller for winding the conductive adhesive film. It is characterized in that: Both ends of the buffer roller are provided with rotating shafts, and rolling bearings are sleeved on the rotating shafts; The side walls of the box body are symmetrically provided with fixed cavities with upper openings and side openings; a fixing device is arranged inside the fixed cavities; the rolling bearings are connected to the fixing device; a first buffer plate and a second buffer plate are respectively arranged on the upper and lower sides of the fixing device; Buffer springs are arranged between the first buffer plate, the second buffer plate and the fixing device; and positioning grooves are arranged on the first buffer plate, the second buffer plate and the fixing device, and both ends of the buffer springs are respectively embedded in the positioning grooves of the first buffer plate, the second buffer plate and the fixing device; A limiting bolt is arranged above the first buffer plate, and the limiting bolt penetrates through the side wall of the fixed cavity and is connected to the side wall of the box body to limit the first buffer plate.

2. The large rewinder for vacuum extraction according to claim 1, characterized in that: The fixing device includes clamping plates arranged on both sides of the rolling bearing, and the middle of the clamping plates is a semi-circular structure, and flat plate structures are connected to both ends of the semi-circular structure of the clamping plates; the clamping plates hold and fix the rolling bearing; It also includes fixing blocks arranged on the upper and lower sides of the clamping plates, and the structure of the fixing blocks fits with that of the clamping plates; and the fixing blocks and the clamping plates are connected by bolts; and the positioning grooves are arranged on the fixing blocks.

3. The large rewinder for vacuum pumping according to claim 2, characterized in that: Fixing plates are arranged at both ends of the fixing blocks. The fixing plates are composed of a vertical plate and a horizontal plate. The horizontal plate is attached to the side part of the fixing block, and the plate surface of the horizontal plate is flush with the side wall of the fixing block; a balance protrusion is arranged on the horizontal plate in the horizontal direction, and the fixing block is provided with a groove structure matching the balance protrusion; the vertical plate and the fixing block are connected by bolts.

4. A large rewinder for vacuum pumping according to claim 3, characterized in that: A limiting protrusion is arranged on the periphery of the rolling bearing, and a limiting groove matching the limiting protrusion is arranged on the clamping plate.

5. A large rewinder for vacuum pumping according to claim 4, characterized in that: A buffer layer is arranged between the clamping plate and the fixing block, and the buffer layer is made of rubber material.

6. The large rewinder for evacuating according to claim 5, characterized in that: The first buffer plate and the second buffer plate have the same structure; the first buffer plate includes a bottom plate, a middle plate and a top plate stacked in sequence; the bottom plate, the middle plate and the top plate are connected by bolts; and the positioning groove is arranged on the bottom plate.

7. A large rewinder for vacuum pumping according to claim 6, characterized in that: Stable grooves and stable blocks that match each other are respectively arranged at the joints of the bottom plate, the middle plate and the top plate.

8. A large rewinder for vacuum extraction according to claim 7, characterized in that: Screw holes are arranged on the side wall of the box body and the side wall of the fixed cavity from top to bottom. The limiting bolt penetrates through the screw holes to limit the top plate, and the lower side of the limiting bolt is located in the stable groove of the top plate.

9. A large rewinder for evacuating air according to claim 1, characterized in that: There are 3 buffer springs.

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