Accurate cutting equipment and method for self-adhesive label backing paper

Abstract

The invention discloses precise cutting equipment for self-adhesive label backing paper, and relates to the technical field of cutting equipment. The conveying device is rotationally arranged on the cutting machine body and is used for conveying the backing paper; the two tension balancing devices are symmetrically distributed in the conveying direction, fixed to the cutting machine body through fixing transverse plates and located between the conveying devices; the limiting device is rotationally arranged on the cutting machine body and located on the output side of the tension balancing device; and the cutting device is fixedly arranged on the cutting machine body, is positioned above the limiting device and is far away from one side of the tension balancing device. In the backing paper conveying process, stable tension can be continuously applied, backing paper is leveled, transition is conducted through the limiting device, the situation that deviation is caused to backing paper cutting due to the influence of the tension, the cutting precision is affected is avoided, the position of the cutting knife is movably adjusted, and cutting work of backing paper of different specifications is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting equipment, and more particularly to a precise cutting device and method for self-adhesive label backing paper. Background Art

[0002] Self-adhesive labels are a widely used identification material, which consists of a face material, an adhesive and a backing paper. The face material has good printing adaptability and can present clear patterns, texts and colors. The adhesive allows the label to be firmly attached to the surface of various objects and has good stickiness. The backing paper plays the role of protecting the adhesive and facilitating use. In the production process of self-adhesive labels, the backing paper needs to be cut according to the requirements of different lengths and widths. The core requirement is to achieve smooth transmission and precise half-cutting of the backing paper. Since the backing paper is thin and easy to deform, tension needs to be applied to the backing paper. Appropriate tension can make the backing paper taut, reduce wrinkles and looseness, and thus keep it flat. However, excessive tension may cause the backing paper to stretch, deform or break, and too little tension cannot be effectively flattened. Existing equipment is difficult to accurately achieve dynamic balance of tension and accurately cut the backing paper. Therefore, it is necessary to provide a precise cutting device and method for the backing paper of self-adhesive labels to solve the problems raised in the above background technology. Summary of the Invention

[0003] To achieve the above-mentioned object, the present invention provides the following technical solution: a device and method for accurately cutting the backing paper of a self-adhesive label, comprising:

[0004] Cutting the body;

[0005] The conveying device is rotatably arranged on the cutting machine body to convey the bottom paper;

[0006] Tension balancing device, with two groups symmetrically distributed in the conveying direction, fixed to the cutting machine body through a fixed transverse plate, located between the conveying devices;

[0007] A limiting device is rotatably mounted on the cutting machine body and is located on the output side of the tension balancing device;

[0008] The cutting device is fixedly arranged on the cutting machine body, located obliquely above the limiting device and away from the tension balancing device.

[0009] Furthermore, preferably, the conveying device includes:

[0010] The unwinding shaft is rotatably arranged on the side of the cutting machine body close to the tension balancing device;

[0011] The reel is rotatably arranged on a side of the cutting machine body away from the unreeling shaft and adjacent to the cutting device;

[0012] A plurality of paper guide shafts are provided, which are rotatably arranged on the cutting machine body and are located between the unwinding shaft and the tension balancing device, and between the rewinding shaft and the cutting device.

[0013] Furthermore, preferably, the tension balancing device includes:

[0014] The driving assembly is provided with two groups distributed along the fixed horizontal plate in a straight line and is rotatably arranged between the fixed horizontal plates;

[0015] Two chains are symmetrically distributed about the drive assembly, and the chains connect the two sets of drive assemblies;

[0016] A plurality of tension applying components are distributed along the chain and fixed on the chain plates of the chain.

[0017] Furthermore, preferably, the driving assembly includes:

[0018] The transmission shaft is rotatably arranged between the fixed transverse plates and is driven by the drive motor;

[0019] The sprocket is fixed on the transmission shaft and connected to the chain.

[0020] Furthermore, preferably, the tension applying assembly includes:

[0021] Two positioning plates are symmetrically distributed, and both ends of the positioning plates are fixed to the corresponding chain plates on the two chains respectively;

[0022] The fixed shaft is fixed in the middle of the two positioning plates;

[0023] A rotating wheel is arranged between the positioning plates and is rotatably connected to the fixed shaft;

[0024] The resistance ring is fixed on the outer ring of the rotating wheel.

[0025] Furthermore, preferably, the limiting device includes:

[0026] A guide shaft is rotatably disposed within the cutting machine body and is located on the output side of the tension balancing device;

[0027] A plurality of limiting rings are linearly distributed and fixed on the guide shaft.

[0028] Furthermore, preferably, the cutting device comprises:

[0029] A fixed horizontal column is fixed inside the cutting machine body and is located on the side of the limiting device away from the tension balancing device;

[0030] The conveyor belt is fixed to the bottom of the fixed horizontal column, the upper belt body passes through the inside of the fixed horizontal column, and the lower belt body is located at the bottom of the fixed horizontal column;

[0031] The cutting components are distributed along the fixed horizontal column and are provided in multiple groups. The cutting components are slidably arranged on the fixed horizontal column and are connected to the conveyor belt. In addition, the multiple cutting components can be fixedly connected to the conveyor belt individually.

[0032] Furthermore, preferably, the cutting component includes:

[0033] The moving block is slidably arranged on the fixed horizontal column and connected to the lower belt body of the conveyor belt;

[0034] a telescopic connecting member, rotatably arranged at the bottom of the moving block;

[0035] A power motor is fixed to the bottom of the telescopic connector;

[0036] The cutting knife is vertically arranged and fixedly connected to the power motor.

[0037] A method for accurately cutting the backing paper of a self-adhesive label comprises the following steps:

[0038] Step 1: Install the paper roll on the unwinding shaft, pass the bottom paper around the paper guide shaft, pass around the top of the tension balance device, pass around the bottom of the limit device again, and be guided by the paper guide shaft to the rewinding shaft;

[0039] Step 2: Start the equipment. The bottom paper is continuously conveyed by the conveying device, and the driving component drives the chain to rotate, thereby driving the tension applying component to continuously apply tension to both sides of the bottom of the bottom paper to flatten the bottom paper.

[0040] Step 3: The flattened base paper is conveyed along the bottom of the limiting device. When outputting, the base paper is cut by the cutting device. Multiple cutting components are individually fixedly connected to the conveyor belt. The spacing between the cutting components is adjusted to cut the base paper into different specifications.

[0041] Step 4: The cut bottom paper is guided to the take-up shaft by the paper guide shaft and then taken up.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] In the present invention, by setting up the tension balancing device, tension is continuously applied to both sides of the bottom paper, and the bottom paper is automatically detached, which can ensure that the bottom paper remains flat under the action of tension and effectively avoid damage to the bottom paper caused by the tension; by setting up the limiting device, the flattened bottom paper is guided and the deformation of the bottom paper is limited, so that the bottom paper remains flat, and the cutting accuracy of the cutting knife is effectively improved during the cutting process; by setting up the cutting device, the bottom paper is cut, and under the action of the moving block and the conveyor belt, the position of the cutting knife is moved to realize the cutting of bottom papers of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1This is a schematic diagram of the overall structure of a precision cutting device for self-adhesive label backing paper;

[0045] Figure 2 It is a structural schematic diagram of the conveying device;

[0046] Figure 3 It is a schematic diagram of the structure of the tension balancing device, the limiting device and the cutting device;

[0047] Figure 4 It is a structural schematic diagram of the tension balancing device;

[0048] Figure 5 It is a structural diagram of the drive component;

[0049] Figure 6 is a structural diagram of a tension applying mechanism;

[0050] Figure 7 It is a structural diagram of the cutting component;

[0051] In the figure: 1. cutting body; 2. conveying device; 3. tension balancing device; 4. fixed horizontal plate; 5. limiting device; 6. cutting device; 7. bottom paper; 21. unwinding shaft; 22. rewinding shaft; 23. paper guide shaft; 31. driving assembly; 32. chain; 33. tension applying assembly; 51. guide shaft; 52. limiting ring; 61. fixed horizontal column; 62. conveyor belt; 63. cutting assembly; 311. transmission shaft; 312. sprocket; 331. positioning plate; 332. fixed shaft; 333. rotating wheel; 334. resistance ring; 631. moving block; 632. telescopic connecting piece; 633. power motor; 634. cutting knife. DETAILED DESCRIPTION

[0052] See also Figures 1 to 7 In an embodiment of the present invention, a device and method for accurately cutting the backing paper of a self-adhesive label include:

[0053] Cutting body 1;

[0054] The conveying device 2 is rotatably mounted on the cutting machine body 1 to convey the bottom paper 7;

[0055] The tension balancing device 3 is symmetrically distributed in two groups with respect to the conveying direction and is fixed to the cutting machine body 1 through a fixed transverse plate 4 and is located between the conveying devices 2;

[0056] The limiting device 5 is rotatably mounted on the cutting machine body 1 and is located on the output side of the tension balancing device 3;

[0057] The cutting device 6 is fixedly mounted on the cutting machine body 1 , and is located obliquely above the limiting device 5 and away from the tension balancing device 3 .

[0058] In this embodiment, the conveying device 2 includes:

[0059] The unwinding shaft 21 is rotatably arranged on one side of the cutting machine body 1 close to the tension balancing device 3;

[0060] The reeling shaft 22 is rotatably arranged on a side of the cutting machine body 1 away from the unreeling shaft 21 and adjacent to the cutting device 6;

[0061] There are multiple paper guide shafts 23 , which are rotatably arranged on the cutting machine body 1 and are located between the unwinding shaft 21 and the tension balancing device 3 , and between the rewinding shaft 22 and the cutting device 6 .

[0062] That is, the paper roll is mounted on the unwinding shaft 21, the bottom paper 7 is wound around the paper guide shaft 23, passes through the tension balancing device 3 and the limiting device 5 in sequence, is leveled by the tension balancing device 3, outputs from the limiting device 5, and is cut by the cutting device 6. The cut bottom paper 7 is guided by the paper guide shaft 23 and transported to the winding shaft 22 for winding.

[0063] In this embodiment, the tension balancing device 3 includes:

[0064] The driving assembly 31 is provided with two groups distributed along the fixed transverse plate 4 in a straight line and is rotatably arranged between the fixed transverse plates 4;

[0065] Two chains 32 are symmetrically distributed about the drive assembly 31 , and the chains 32 connect the two sets of drive assemblies 31 ;

[0066] A plurality of tension applying assemblies 33 are distributed along the chain 32 and fixed on the chain plates of the chain 32 .

[0067] That is to say, when the bottom paper 7 passes over the top of the tension balancing device 3, the two groups of tension balancing devices 3 are started at the same time, and the driving component 31 controls the chain 32 to rotate to both sides of the bottom paper 7, and drives the tension applying component 33 to move cyclically to both sides. When the bottom paper 7 slides over the top of the tension applying component 33, the tension applying component 33 pulls the bottom paper 7 to both sides to flatten the bottom paper 7, and under the continuous pulling of multiple tension applying components 33, the bottom paper 7 remains flat, and under the belt of the chain 32, the tension applying component 33 automatically detaches from the bottom paper 7 when it rotates to the position of the driving component 31, which can ensure that the bottom paper 7 remains flat under the action of tension and effectively avoid damage to the bottom paper 7 caused by tension.

[0068] In this embodiment, the driving assembly 31 includes:

[0069] The transmission shaft 311 is rotatably arranged between the fixed horizontal plates 4 and driven by the driving motor;

[0070] The sprocket 312 is fixed on the transmission shaft 311 and connected to the chain 32 .

[0071] That is, under the action of the driving motor on the side of the fixed transverse plate 4 , the transmission shaft 311 is driven to rotate, and then the chain 32 is driven to rotate through the sprocket 312 , and the bottom paper 7 is flattened through the tension applying assembly 33 .

[0072] In this embodiment, the tension applying assembly 33 includes:

[0073] Two positioning plates 331 are symmetrically distributed, and both ends of the positioning plates 331 are fixed to corresponding chain plates on the two chains 32;

[0074] The fixed shaft 332 is fixed in the middle of the two positioning plates 331;

[0075] The rotating wheel 333 is disposed between the positioning plates 331 and is rotatably connected to the fixed shaft 332;

[0076] The resistance ring 334 is fixed to the outer ring of the rotating wheel 333 .

[0077] That is to say, when the bottom paper 7 passes through the top of the tension balancing device 3, under the action of the bottom paper 7, the rotating wheel 333 and the resistance ring 334 rotate on the fixed shaft 332 to assist the bottom paper 7 in conveying, and the driving component 31 drives the positioning plate 331 to move along the running trajectory of the chain 32 through the chain 32. Under the action of the resistance ring 334, tension is applied to both sides of the bottom paper 7 to level the bottom paper 7. That is, while the rotating wheel 333 assists the bottom paper 7 in conveying by rotating, the resistance ring 334 applies tension to both sides of the bottom paper 7 to level the bottom paper 7. It should be noted that there is a certain friction between the resistance ring 334 and the bottom paper 7. Under the action of the friction, tension can be applied to the bottom paper 7 while effectively avoiding damage to the bottom paper 7 due to excessive friction.

[0078] In this embodiment, the limiting device 5 includes:

[0079] The guide shaft 51 is rotatably disposed in the cutting machine body 1 and is located on the output side of the tension balancing device 3;

[0080] A plurality of limiting rings 52 are linearly distributed and fixed on the guide shaft 51 .

[0081] That is to say, the flattened bottom paper 7 is conveyed to the limiting device 5, and under the action of the limiting ring 52, the bottom paper 7 is effectively prevented from wrinkling again, so that the bottom paper 7 remains taut, thereby keeping the bottom paper 7 flat. When the bottom paper 7 is output from the limiting device 5, it is cut by the cutting device 6. Under the transition action of the limiting device 5, the flatness of the bottom paper 7 is maintained by the limiting ring 52, and it is avoided that the tension balancing device 3 applies tension to the bottom paper 7 and then cuts it directly, resulting in deviation in the cutting of the bottom paper 7 due to the influence of tension, affecting the cutting accuracy. It should be noted that the friction between the limiting ring 52 and the bottom paper 7 can assist the bottom paper 7 to fit the limiting device 5, effectively preventing the bottom paper 7 from wrinkling and loosening again, affecting the cutting accuracy.

[0082] In this embodiment, the cutting device 6 includes:

[0083] The fixed horizontal column 61 is fixed inside the cutting machine body 1 and is located on the side of the limiting device 5 away from the tension balancing device 3;

[0084] The conveyor belt 62 is fixed to the bottom of the fixed horizontal column 61, with the upper belt body passing through the inside of the fixed horizontal column 61 and the lower belt body located at the bottom of the fixed horizontal column 61;

[0085] The cutting components 63 are distributed in multiple groups along the fixed horizontal column 61 , are slidably set on the fixed horizontal column 61 , and are connected to the conveyor belt 62 . In addition, multiple cutting components 63 can be individually fixedly connected to the conveyor belt 62 .

[0086] That is to say, driven by the conveyor belt 62, any cutting assembly 63 can be driven to slide on the fixed horizontal column 61, and then the spacing between the cutting assemblies 63 can be adjusted, so that the bottom paper 7 can be cut into different widths to meet different needs.

[0087] In this embodiment, the cutting component 63 includes:

[0088] The movable block 631 is slidably disposed on the fixed horizontal column 61 and connected to the lower belt body of the conveyor belt 62;

[0089] The telescopic connecting member 632 is fixed to the bottom of the moving block 631;

[0090] The power motor 633 is fixed to the bottom of the telescopic connector 632;

[0091] The cutting blade 634 is vertically arranged and fixedly connected to the power motor 633 .

[0092] That is to say, when the moving block 631 is fixedly connected to the conveyor belt 62, driven by the conveyor belt 62, the moving block 631 follows the conveyor belt 62 to slide on the fixed horizontal column 61, and the position of the cutting knife 634 is adjusted. At the same time, under the action of the telescopic connecting member 632, the cutting knife 634 is controlled to move downward. Driven by the power motor 633, the cutting knife 634 rotates to cut the bottom paper 7. The position of each cutting component 63 is adjusted by the conveyor belt 62, and the cutting quantity is determined by the telescopic connecting member 632. In addition, as a preferred embodiment, electromagnets are provided at the upper and lower parts of the connection between the moving block 631 and the conveyor belt 62. Under the action of electricity, the upper and lower electromagnets attract each other to fix the moving block 631 on the conveyor belt 62.

[0093] In this embodiment, a method for accurately cutting the backing paper of a self-adhesive label is characterized by comprising the following steps:

[0094] Step 1: Install the paper roll on the unwinding shaft 21, pass the bottom paper 7 around the paper guide shaft 23, pass around the top of the tension balancing device 3, pass around the bottom of the limiting device 5 again, and be guided by the paper guide shaft 23 to the rewinding shaft 22;

[0095] Step 2: Start the equipment. The bottom paper 7 is continuously conveyed under the action of the conveying device 2. The bottom paper 7 is wound around the paper guide shaft 23, passes through the tension balancing device 3 and the limiting device 5 in sequence, is flattened by the tension balancing device 3, and is output from the limiting device 5. It is cut by the cutting device 6. The cut bottom paper 7 is guided by the paper guide shaft 23 and conveyed to the winding shaft 22 for winding. When the bottom paper 7 passes the top of the tension balancing device 3, the rotating wheel 333 and the resistance ring 334 rotate on the fixed shaft 332 to assist in conveying the bottom paper 7, and the driving component 31 drives the positioning plate 331 to move along the running track of the chain 32 through the chain 32. Under the action of the resistance ring 334, tension is applied to both sides of the bottom paper 7 to flatten the bottom paper 7.

[0096] Step 3: The flattened bottom paper 7 is conveyed along the bottom of the limiting device 5. Under the transition action of the limiting device 5, the bottom paper 7 is kept flat by the limiting ring 52, and it is avoided that the tension balancing device 3 applies tension to the bottom paper 7 and then cuts it directly after leveling it, which causes deviation in the cutting of the bottom paper 7 due to the influence of tension, affecting the cutting accuracy. When the bottom paper 7 is output from the limiting device 5, the cutting device 6 cuts the bottom paper 7, and multiple cutting components 63 are individually fixedly connected to the conveyor belt 62. The spacing between the cutting components 63 is adjusted, and the cutting quantity is determined by the telescopic connecting piece 632, so that the bottom paper 7 is cut into different specifications.

[0097] Step 4: The cut bottom paper 7 is guided to the winding shaft 22 via the paper guide shaft 23 for winding.

[0098] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A precision cutting device for self-adhesive label backing paper, characterized by: include: Cutting the body (1); A conveying device (2) is rotatably mounted on the cutting machine body (1) to convey the bottom paper (7); Tension balancing devices (3) are provided in two groups symmetrically distributed with respect to the conveying direction, fixed to the cutting machine body (1) via a fixed transverse plate (4), and located between the conveying devices (2); A limiting device (5) is rotatably mounted on the cutting machine body (1) and is located on the output side of the tension balancing device (3); The cutting device (6) is fixedly mounted on the cutting machine body (1), and is located obliquely above the limiting device (5) and away from the tension balancing device (3).

2. The precise cutting device for self-adhesive label backing paper according to claim 1, characterized in that: The conveying device (2) comprises: An unwinding shaft (21) is rotatably arranged on a side of the cutting machine body (1) close to the tension balancing device (3); A reel (22) is rotatably arranged on a side of the cutting machine body (1) away from the unreeling shaft (21) and adjacent to the cutting device (6); A plurality of paper guide shafts (23) are provided and are rotatably arranged on the cutting machine body (1), and are located between the unwinding shaft (21) and the tension balancing device (3), and between the rewinding shaft (22) and the cutting device (6).

3. The precise cutting device for self-adhesive label backing paper according to claim 2, characterized in that: The tension balancing device (3) comprises: The driving assembly (31) is provided with two groups distributed linearly along the fixed transverse plate (4) and is rotatably arranged between the fixed transverse plates (4); Two chains (32) are symmetrically distributed about the drive assembly (31), and the chains (32) connect the two sets of drive assemblies (31); A plurality of tension applying components (33) are distributed along the chain (32) and fixed on the chain plates of the chain (32).

4. The precise cutting device for self-adhesive label backing paper according to claim 3, characterized in that: The driving assembly (31) comprises: A transmission shaft (311) is rotatably disposed between the fixed transverse plates (4) and is driven by a drive motor; The sprocket (312) is fixed on the transmission shaft (311) and connected to the chain (32).

5. The precise cutting device for self-adhesive label backing paper according to claim 4, characterized in that: The tension applying assembly (33) comprises: Two positioning plates (331) are symmetrically distributed, and both ends of the positioning plates (331) are respectively fixed to corresponding chain plates on the two chains (32); A fixed shaft (332) is fixed in the middle of the two positioning plates (331); A rotating wheel (333) is disposed between the positioning plates (331) and is rotationally connected to the fixed shaft (332); The resistance ring (334) is fixed to the outer ring of the rotating wheel (333).

6. The precise cutting device for self-adhesive label backing paper according to claim 5, characterized in that: The limiting device (5) comprises: A guide shaft (51) is rotatably disposed in the cutting machine body (1) and is located on the output side of the tension balancing device (3); A plurality of limiting rings (52) are linearly distributed and fixed on the guide shaft (51).

7. The precise cutting device for self-adhesive label backing paper according to claim 6, characterized in that: The cutting device (6) comprises: A fixed horizontal column (61) is fixed inside the cutting machine body (1) and is located on a side of the limiting device (5) away from the tension balancing device (3); The conveyor belt (62) is fixed to the bottom of the fixed horizontal column (61), the upper belt body passes through the interior of the fixed horizontal column (61), and the lower belt body is located at the bottom of the fixed horizontal column (61); The cutting components (63) are distributed in multiple groups along the fixed horizontal column (61), are slidably arranged on the fixed horizontal column (61), and are connected to the conveyor belt (62). The multiple cutting components (63) can be fixedly connected to the conveyor belt (62) individually.

8. The precise cutting device for self-adhesive label backing paper according to claim 7, characterized in that: The cutting component (63) comprises: A movable block (631) is slidably disposed on the fixed horizontal column (61) and connected to the lower belt body of the conveyor belt (62); A telescopic connecting member (632) is rotatably arranged at the bottom of the moving block (631); A power motor (633) is fixed to the bottom of the telescopic connector (632); The cutting knife (634) is vertically arranged and fixedly connected to the power motor (633).

9. The method for accurately cutting the backing paper of a self-adhesive label according to claim 8, characterized in that: The steps include: Step 1: Install the paper roll on the unwinding shaft (21), pass the bottom paper (7) around the paper guide shaft (23), pass around the top of the tension balancing device (3), pass around the bottom of the limiting device (5), and be guided by the paper guide shaft (23) to the rewinding shaft (22); Step 2: Start the device, the bottom paper (7) is continuously conveyed under the action of the conveying device (2), and the driving component (31) drives the chain (32) to rotate, thereby driving the tension applying component (33) to continuously apply tension to both sides of the bottom of the bottom paper (7) to flatten the bottom paper (7); Step 3: The flattened bottom paper (7) is conveyed along the bottom of the limiting device (5), and the bottom paper (7) is cut by the cutting device (6) during output, and a plurality of cutting components (63) are individually fixedly connected to the conveyor belt (62), and the spacing between the cutting components (63) is adjusted to cut the bottom paper (7) into different specifications; Step 4: The cut bottom paper (7) is guided to the reeling shaft (22) via the paper guide shaft (23) for reeling.

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