Precise slitting device for release paper

Abstract

The invention discloses a release paper precise slitting device which comprises a rack, and an unwinding roller, a paper cutting mechanism and a winding mechanism are sequentially arranged on the rack. The paper cutting mechanism comprises an upper paper cutting roller and a lower paper cutting roller, a plurality of annular cutters are mounted on the upper paper cutting roller, and a plurality of annular grooves are formed in the lower paper cutting roller; the winding mechanism comprises a plurality of winding rollers, the winding rollers are driven by a rotary driving mechanism to rotate, and all the winding rollers are staggered in height. According to the accurate slitting device for the release paper, the front stabilizing roller set and the rear stabilizing roller set are matched with the movable frame to ascend and descend, the release paper can be dynamically leveled, tension can be stabilized, cutting deviation and wrinkles are avoided, and the slitting precision is improved; the negative pressure structure of the lower paper cutting roller can suck and remove cut paper scraps in real time, the paper scraps are prevented from being adhered to influence the performance of the release paper, and the qualified rate of finished products is increased.

Description

Technical Field

[0001] This invention belongs to the field of release paper production technology, specifically relating to a precision release paper cutting device. Background Technology

[0002] In the field of release paper processing, the slitting device is the core equipment for turning release paper from a whole roll of raw material into a finished product of a specified width. Currently, the following problems are common in the precision slitting devices for release paper on the market: First, the release paper is prone to deviation and wrinkling during the slitting process, especially thin release paper. Due to its low rigidity, it is prone to positional deviation during unwinding and cutting, resulting in uneven cut edges, burrs, dimensional deviations, and other problems, affecting subsequent processing and use. Second, the upper and lower cutting rollers of the cutting mechanism have insufficient matching precision. The positioning structure design of the annular cutter and the lower cutting roller is unreasonable, the cutter is prone to wear, and paper jamming is prone to occur during slitting, reducing slitting efficiency. Third, the winding process lacks an effective tension adjustment mechanism. Uneven tension during simultaneous winding of multiple rolls can easily lead to uneven tension and curling of the finished product. In addition, the limiting structure on the winding roller is fixed, making it difficult to adapt to the slitting requirements of release paper of different widths, resulting in poor versatility. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a release paper precision slitting device, including a frame, on which an unwinding roller, a paper cutting mechanism, and a winding mechanism are sequentially arranged. The unwinding roller is used to unwind the release paper, and the unwinding roller is rotatably mounted on the frame; The paper cutting mechanism includes an upper paper cutting roller and a lower paper cutting roller. The upper paper cutting roller is located above the lower paper cutting roller. The upper paper cutting roller and the lower paper cutting roller are rotatably mounted on the frame. The upper paper cutting roller is equipped with several annular cutters, which are coaxial with the upper paper cutting roller. The lower paper cutting roller is provided with several annular grooves, which are coaxial with the lower paper cutting roller. The annular grooves correspond one-to-one with the annular cutters, and the lower end of the annular cutter is located in the corresponding annular groove. The winding mechanism includes several winding rollers, which are rotatably mounted on the frame. The winding rollers are driven to rotate by a rotary drive mechanism, and all the winding rollers are staggered in height.

[0004] As a preferred embodiment of the above technical solution, a front stabilizing roller group is provided between the paper cutting mechanism and the unwinding roller, and a rear stabilizing roller group is provided between the paper cutting mechanism and the winding mechanism. The front stabilizing roller group includes a front upper stabilizing roller and a front lower stabilizing roller, which are rotatably mounted on the frame. The rear stabilizing roller group includes a rear upper stabilizing roller and a rear lower stabilizing roller, which are rotatably mounted on the frame. The rear lower stabilizing roller is driven to rotate by a rotation drive mechanism.

[0005] As a preferred embodiment of the above technical solution, a plurality of tension adjustment mechanisms are provided between the rear stabilizing roller group and the winding mechanism, and the tension adjustment mechanisms correspond one-to-one with the winding rollers.

[0006] As a preferred embodiment of the above technical solution, the tension adjustment mechanism includes an adjustment roller, the two ends of which are rotatably mounted on a lifting frame. A slider is fixedly connected to the lifting frame, the slider is mounted on a vertical slide rail, and a spring is provided above the slider. The upper end of the spring is fixedly connected to the upper end of the vertical slide rail.

[0007] As a preferred embodiment of the above technical solution, the frame is provided with a movable frame, and the two ends of the lower front stabilizing roller are rotatably connected to the movable frame. Sliding blocks are fixedly connected to both sides of the movable frame, and the sliding blocks are respectively installed on vertical slide rails. The vertical slide rails are fixedly connected to the frame, and the sliding blocks are driven to move on the vertical slide rails by a lifting drive mechanism. Adjusting sliders are rotatably connected to both ends of the upper front stabilizing roller, and the adjusting sliders are slidably installed on adjusting slide rails. The adjusting slide rails are fixedly connected to the movable frame, and the adjusting sliders are provided with compression springs. The upper end of the compression springs is fixedly connected to the upper end of the adjusting slide rails.

[0008] As a preferred embodiment of the above technical solution, the lower cutting roller includes a roller shaft, on which several circular plates are arranged in sequence, with annular grooves located on the circular plates respectively. The roller shaft has a cavity inside, and the circular plates with annular grooves have a negative pressure cavity inside. The bottom of the annular grooves is connected to the negative pressure cavity through several negative pressure holes. The roller shaft has several air holes, and the cavity is connected to the negative pressure cavity through the air holes. The cavity is formed with negative pressure by a negative pressure device.

[0009] As a preferred embodiment of the above technical solution, a fixed sliding sleeve is fitted onto one end of the roller shaft. The fixed sliding sleeve is fixedly installed on the frame. A vacuum chamber is provided inside the fixed sliding sleeve. Several connection ports are provided on the inner wall of the fixed sliding sleeve. Several communication ports connecting to the cavity are provided on the roller shaft. The negative pressure device is connected to the fixed sliding sleeve through an air pipe.

[0010] As a preferred embodiment of the above technical solution, the take-up roller is provided with two annular baffles spaced apart from each other, and the annular baffles are respectively fixedly connected to the take-up roller by clamps.

[0011] The beneficial effects of this invention are as follows: The precise release paper slitting device of this invention, with its front and rear stabilizing roller groups working in conjunction with the movable frame lifting mechanism, can dynamically flatten the release paper and stabilize its tension, avoiding cutting deviation and wrinkles, thus improving slitting accuracy. The negative pressure structure of the lower cutting roller can remove cutting debris in real time, preventing it from adhering and affecting the performance of the release paper, thereby improving the finished product qualification rate. The independent tension adjustment mechanism, through spring and pressure sensor linkage, can precisely control the tension of each winding roller, ensuring neat winding. The position of the annular baffle is adjustable to adapt to different width slitting requirements, offering high flexibility. The entire device eliminates the need for frequent manual cleaning of debris, reducing downtime, and can adapt to various specifications of release paper, balancing slitting quality and production efficiency, and reducing production costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the paper cutting mechanism; Figure 3 This is a schematic diagram of the cross-sectional structure of the roller shaft; Figure 4 This is a schematic diagram of the tension adjustment mechanism; Figure 5 This is a structural diagram of the movable frame. Detailed Implementation

[0013] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] like Figure 1-5 As shown, the release paper precision slitting device includes a frame, on which an unwinding roller 1, a paper cutting mechanism, and a rewinding mechanism are sequentially arranged. The unwinding roller 1 is used for unwinding the release paper, and the unwinding roller 1 is rotatably mounted on the frame; The paper cutting mechanism includes an upper paper cutting roller 2 and a lower paper cutting roller 3. The upper paper cutting roller 2 is located above the lower paper cutting roller 3. The upper paper cutting roller 2 and the lower paper cutting roller 3 are rotatably mounted on the frame. A plurality of annular cutters 4 are mounted on the upper paper cutting roller 2. The annular cutters 4 are coaxial with the upper paper cutting roller 2. A plurality of annular grooves 5 are provided on the lower paper cutting roller 3. The annular grooves 5 correspond one-to-one with the annular cutters 4. The lower end of the annular cutter 4 is located in the corresponding annular groove 5. The winding mechanism includes several winding rollers 6, which are rotatably mounted on the frame. Each winding roller 6 is driven to rotate by a rotary drive mechanism, and all winding rollers 6 are staggered in height. The rotary drive mechanism is a motor.

[0017] Furthermore, a front stabilizing roller group is provided between the paper cutting mechanism and the unwinding roller 1, and a rear stabilizing roller group is provided between the paper cutting mechanism and the winding mechanism. The front stabilizing roller group includes a front upper stabilizing roller 7 and a front lower stabilizing roller 8, which are rotatably mounted on the frame. The rear stabilizing roller group includes a rear upper stabilizing roller 9 and a rear lower stabilizing roller 10, which are rotatably mounted on the frame. The rear lower stabilizing roller 10 is driven to rotate by a rotation drive mechanism. The front and rear stabilizing roller groups keep the release paper stable, preventing the release paper from becoming taut and loose during the cutting process, which would lead to a decrease in cutting accuracy. The rotation drive mechanism is a motor.

[0018] Furthermore, a number of tension adjustment mechanisms are provided between the rear stabilizing roller group and the winding mechanism, and the tension adjustment mechanisms correspond one-to-one with the winding roller 6.

[0019] Furthermore, the tension adjustment mechanism includes an adjustment roller 11, with both ends of the adjustment roller 11 rotatably mounted on a lifting frame 12. A slider 13 is fixedly connected to the lifting frame 12, and the slider 13 is mounted on a vertical slide rail 14. A spring 15 is located above the slider 13, and the upper end of the spring 15 is fixedly connected to the upper end of the vertical slide rail 14. The adjustment roller 11 presses down on the release paper to be wound up by the elastic force of the spring 15, ensuring that the release paper maintains a certain tension and can be tightened onto the winding roller 6. A pressure sensor is installed between the slider 13 and the spring 15 to sense pressure changes and generate a pressure signal. The rotation drive mechanism controls the rotational speed of the winding roller 6 based on the pressure signal.

[0020] Furthermore, the frame is equipped with a movable frame 16, with both ends of the lower front stabilizing roller 8 rotatably connected to the movable frame 16. Sliding blocks 17 are fixedly connected to both sides of the movable frame 16, and the sliding blocks 17 are respectively mounted on vertical slide rails 18, which are fixedly connected to the frame. The sliding blocks 17 are driven to move on the vertical slide rails 18 by a lifting drive mechanism 40. Adjusting sliders 13 are rotatably connected to both ends of the upper front stabilizing roller 7, and the adjusting sliders 13 are slidably mounted on adjusting slide rails 19, which are fixedly connected to the movable frame 16. A pressure spring 20 is provided on the adjusting slider 13, and the upper end of the pressure spring 20 is fixedly connected to the upper end of the adjusting slide rail 19. The pressure spring 20 keeps the upper front stabilizing roller 7 in a downward pressure state, clamping the release paper passing between the lower front stabilizing roller 8 and the upper front stabilizing roller 7 to prevent displacement during cutting. During the paper cutting process, the movable frame 16 repeatedly rises and falls, continuously pulling the release paper on the unwinding roller 1 to unwind, while simultaneously flattening the release paper about to enter the paper cutting mechanism, ensuring even tension and preventing wrinkles. The lifting drive mechanism 40 uses a cylinder.

[0021] Furthermore, the lower cutting roller 3 includes a roller shaft 21, on which several circular plates 22 are sequentially arranged. Annular grooves 5 are located on the circular plates 22. The roller shaft 21 has an internal cavity 23. The circular plates 22 with annular grooves 5 have internal negative pressure chambers 24. The bottom of the annular grooves 5 connects to the negative pressure chambers 24 through several negative pressure holes 25. The roller shaft 21 has several air holes 26, and the cavity 23 connects to the negative pressure chambers 24 through the air holes 26. Negative pressure is created in the cavity 23 by a negative pressure device. The negative pressure device uses existing technologies such as vacuum pumps to create negative pressure within the negative pressure chambers 24, thereby removing the paper scraps generated during the seven processes and preventing them from sticking to the release paper and affecting product performance. The circular plates 22 and the roller shaft 21 rotate synchronously through the cooperation of keys and keyways.

[0022] Furthermore, a fixed sliding sleeve 27 is fitted onto one end of the roller shaft 21. The fixed sliding sleeve 27 is fixedly mounted on the frame. A vacuum chamber 23 is provided inside the fixed sliding sleeve 27, and several connection ports 28 are provided on the inner wall of the fixed sliding sleeve 27. Several communication ports 29 are provided on the roller shaft 21, connecting to the vacuum chamber 23. The negative pressure device is connected to the fixed sliding sleeve 27 via an air pipe. The negative pressure device uses a vacuum pump to create negative pressure within the vacuum chamber 23. The fixed sliding sleeve 27 remains stationary. During the rotation of the roller shaft 21, the communication ports 29 alternately connect with the connection ports 28, creating negative pressure in the negative pressure chamber 24 inside the roller shaft 21. Filter screens are installed at the communication ports 29 to prevent paper scraps from entering the negative pressure device. End caps are provided at both ends of the roller shaft 21 for easy cleaning of paper scraps trapped inside the roller shaft 21. Multiple connecting ports 29 are arranged in a circular array around the roller shaft 21, and there are at least two connecting ports 28, which are arranged in an arc shape to ensure that there is always a connecting port 29 connected to the connecting port 28. This avoids the connecting ports 29 from being blocked, and the negative pressure adsorption effect can be maintained in the annular groove 5.

[0023] Furthermore, the take-up roller 6 is provided with two annular baffles 30 spaced apart, and the annular baffles 30 are fixedly connected to the take-up roller 6 by clamps. The slit release paper is sandwiched between the annular baffles 30 for winding. The annular baffles 30 are clamped to the take-up roller 6 by clamps, so the position and spacing of the annular baffles 30 can be adjusted as needed.

[0024] It is worth mentioning that the technical features of motors, vacuum pumps, etc. involved in this patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0025] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A release paper precision slitting device, characterized in that, It includes a frame, on which are sequentially arranged an unwinding roller, a paper cutting mechanism, and a rewinding mechanism. The unwinding roller is used to unwind the release paper, and the unwinding roller is rotatably mounted on the frame; The paper cutting mechanism includes an upper paper cutting roller and a lower paper cutting roller. The upper paper cutting roller is located above the lower paper cutting roller. The upper paper cutting roller and the lower paper cutting roller are rotatably mounted on the frame. The upper paper cutting roller is equipped with several annular cutters, which are coaxial with the upper paper cutting roller. The lower paper cutting roller is provided with several annular grooves, which are coaxial with the lower paper cutting roller. The annular grooves correspond one-to-one with the annular cutters, and the lower end of the annular cutter is located in the corresponding annular groove. The winding mechanism includes several winding rollers, which are rotatably mounted on the frame. The winding rollers are driven to rotate by a rotary drive mechanism, and all the winding rollers are staggered in height. A front stabilizing roller group is provided between the paper cutting mechanism and the unwinding roller, and a rear stabilizing roller group is provided between the paper cutting mechanism and the winding mechanism. The front stabilizing roller group includes a front upper stabilizing roller and a front lower stabilizing roller, which are rotatably mounted on the frame. The rear stabilizing roller group includes a rear upper stabilizing roller and a rear lower stabilizing roller, which are rotatably mounted on the frame. The rear lower stabilizing roller is driven to rotate by a rotation drive mechanism. The frame is equipped with a movable frame. The two ends of the lower front stabilizing roller are rotatably connected to the movable frame. Sliding blocks are fixedly connected to both sides of the movable frame. The sliding blocks are installed on vertical slide rails, which are fixedly connected to the frame. The sliding blocks are driven to move on the vertical slide rails by a lifting drive mechanism. The two ends of the upper front stabilizing roller are rotatably connected to adjusting sliders. The adjusting sliders are slidably installed on adjusting slide rails, which are fixedly connected to the movable frame. The adjusting sliders are equipped with compression springs, and the upper end of the compression springs is fixedly connected to the upper end of the adjusting slide rails.

2. The release paper precision slitting device as described in claim 1, characterized in that, Several tension adjustment mechanisms are provided between the rear stabilizing roller group and the winding mechanism, and each tension adjustment mechanism corresponds to a winding roller.

3. The release paper precision slitting device as described in claim 2, characterized in that, The tension adjustment mechanism includes an adjustment roller, the two ends of which are rotatably mounted on a lifting frame. A slider is fixedly connected to the lifting frame, the slider is mounted on a vertical slide rail, and a spring is provided above the slider. The upper end of the spring is fixedly connected to the upper end of the vertical slide rail.

4. The release paper precision slitting device as described in claim 1, characterized in that, The paper cutting roller includes a roller shaft with several circular plates arranged in sequence on the roller shaft. Annular grooves are located on the circular plates. The roller shaft has a cavity inside, and the circular plates with annular grooves have a negative pressure cavity inside. The bottom of the annular grooves is connected to the negative pressure cavity through several negative pressure holes. The roller shaft has several air holes, and the cavity is connected to the negative pressure cavity through the air holes. The cavity is subjected to negative pressure by a negative pressure device.

5. The release paper precision slitting device as described in claim 4, characterized in that, One end of the roller is fitted with a fixed sliding sleeve, which is fixedly installed on the frame. The fixed sliding sleeve has a vacuum chamber inside and several connection ports on its inner wall. The roller has several connection ports that connect to the cavity. The negative pressure device is connected to the fixed sliding sleeve through an air pipe.

6. The release paper precision slitting device as described in claim 1, characterized in that, The take-up roller is provided with two annular baffles spaced apart from each other, and the annular baffles are fixedly connected to the take-up roller by clamps.

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