Sheet film conveying device of circular knife machine

Abstract

The invention discloses a sheet film conveying device of a circular knife machine, and belongs to the technical field of circular knife machines. The air cushion conveying device comprises an air cushion conveying assembly and an air conveying assembly, the air cushion conveying assembly comprises an air cushion plate used for adsorbing a sheet film, a conveying unit and an air suction unit, the air cushion plate is connected with the rack through the conveying unit, and the conveying unit can drive the air cushion plate to move in the direction perpendicular to the moving direction of the sheet film; the multiple sets of air suction units arranged side by side are arranged on the air cushion plate, each air suction unit comprises multiple air suction hole bodies arranged in an array mode, the adjacent air suction hole bodies are oppositely arranged in a staggered mode, and the air suction hole bodies can suck air relative to the sheet film; the gas conveying assembly comprises a plurality of gas conveying heads and a flow limiting valve, one end of each gas conveying head is inserted into the gas suction hole body, the other end of each gas conveying head is connected with the flow limiting valve, and the flow limiting valve can limit the flow of gas. According to the sheet film conveying device, it can be guaranteed that sheet films are kept stable in the conveying process, and the sheet films are prevented from sliding relatively to generate dislocation and deviation.

Description

Technical Field

[0001] The invention relates to the technical field of circular knife machines, and in particular to a sheet film transmission device of a circular knife machine. Background Art

[0002] The circular knife die-cutting machine uses a rolling knife to continuously rotate and die-cut sheet films. It is one of the most efficient equipment among die-cutting machines. The die-cut products are widely used in mobile phones, computers, LCD monitors, digital cameras, LCD backlights and other fields. During the production process of the circular knife die-cutting machine, there are many cases where the auxiliary materials need to be transferred and pasted so that the auxiliary materials after cutting can be adsorbed on the bottom roller and transported to the main material belt for compounding to meet the requirements of the product process.

[0003] When the sheet film is moved on the circular die-cutting machine, the sheet film lacks effective clamping and restriction and is easily deviated to both sides, causing the sheet film to be misplaced, detached or even dropped. Summary of the invention

[0004] In view of this, it is necessary to provide a sheet film transmission device for a circular knife machine to solve the problem that the sheet film cannot be effectively clamped and fixed in the existing circular knife machine.

[0005] The present invention provides a sheet film transmission device of a circular knife machine, comprising:

[0006] An air cushion conveying assembly, the air cushion conveying assembly comprising an air cushion plate for adsorbing a sheet film, a conveying unit and an air suction unit, the air cushion plate being connected to a frame through the conveying unit, the conveying unit being capable of driving the air cushion plate to move in a direction perpendicular to the moving direction of the sheet film; a plurality of groups of the air suction units arranged in parallel are arranged on the air cushion plate, the air suction unit comprising a plurality of air suction holes arranged in an array, adjacent air suction holes being arranged in a staggered manner, and the air suction holes being capable of sucking air relative to the sheet film;

[0007] A gas delivery component, the gas delivery component includes multiple gas delivery heads and a flow limiting valve, one end of the gas delivery head is inserted into the air intake hole body, and the other end of the gas delivery head is connected to the flow limiting valve, and the flow limiting valve can limit the flow of gas.

[0008] Furthermore, the suction hole body includes an adsorption portion and a connecting portion, the adsorption portion is elongated relative to the moving direction of the sheet film, the two ends of the adsorption portion along the moving direction of the sheet film are gradually contracted, and the two ends of the connecting portion are respectively connected to the adsorption portion and the air delivery head.

[0009] Furthermore, the adsorption portion is rhombus-shaped or elliptical.

[0010] Furthermore, the flow limiting valve is a self-operated flow control valve.

[0011] Furthermore, the flow limiting valve includes a valve core and an elastic member, the end of the elastic member is connected to the valve core, and the elastic member can shrink relatively to control the relative movement of the valve core and limit the air flow through the self-operated flow control valve.

[0012] Furthermore, the gas delivery component also includes an air suction system, each of the air suction units is cooperatively connected to an air suction system, and the air suction system includes an air pump, and the air pump is connected to multiple flow limiting valves of an air suction unit through pipelines.

[0013] Furthermore, the air cushion conveying assembly also includes a sensing unit and a controller. The sensing unit includes a plurality of sensors equidistantly arranged in a direction perpendicular to the moving direction of the sheet film. The sensors can sense the edge positions on both sides of the sheet film. The controller is electrically connected to the sensors and the conveying unit, respectively, to adjust the relative positions of the edge positions on both sides of the sheet film.

[0014] Furthermore, the conveying unit includes a servo motor, a ball screw nut pair and a slide rail, the ball screw nut pair and the slide rail are respectively connected to the air cushion plate, and the servo motor is connected to the ball screw nut pair.

[0015] Furthermore, it also includes a roller conveying assembly, which includes a roller group for conveying the sheet film, and the air cushion conveying assembly is arranged between two of the roller groups.

[0016] Furthermore, a spacing space for conveying the sheet film is formed in the roller group, and the spacing space is arranged coplanar with the air cushion plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) A sheet film transmission device of a circular knife machine of the present invention is provided with an air suction unit. A plurality of groups of parallel air suction units are arranged on an air cushion board. The air suction unit includes a plurality of air suction holes arranged in an array. The air suction holes can suck air relative to the sheet film. The plurality of air suction holes can form a uniform adsorption force to ensure that the sheet film remains stable and stable during the transmission process, and prevent the sheet film from sliding relative to the air cushion board, causing dislocation and offset. The air suction holes of two adjacent air suction units are relatively staggered. When the sheet film is relatively separated from the air cushion board, a separation line is formed. The separation line only contacts a part of the holes of the staggered air suction holes at any time. Compared with all the air suction holes arranged in an array, the number of air suction holes contacting the separation line is reduced by at least half. At the separation line, the adsorption force between the sheet film and the air cushion board is smaller. Under the premise of not changing the overall suction force of the sheet film, the sheet film can be more easily separated from the air cushion board to avoid damage to the sheet film during transportation.

[0019] (2) A sheet film transmission device of a circular knife machine of the present invention is provided with a gas supply assembly, which includes a plurality of gas supply heads and a flow limiting valve. One end of the gas supply head is inserted into the air suction hole body, and the other end of the gas supply head is connected to the flow limiting valve. Each gas supply head is subjected to the same adsorption pressure. The gas supply head acting on the sheet film is obstructed by the sheet film, and the gas flow is relatively small. The gas supply head that does not act on the sheet film is directly connected to the air, and the flow limiting valve can reduce the flow of the air flow to prevent the gas supply head that does not act on the sheet film from interfering with the gas supply head that acts on the sheet film, thereby interfering with the adsorption effect of the gas supply head on the sheet film. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the air cushion conveying assembly of the present invention;

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure of the local enlargement of the A;

[0024] Figure 4 is a schematic diagram of the structure of the air cushion board of the present invention;

[0025] Figure 5 yes Figure 4 Sectional view at B-B';

[0026] Figure 6 It is a structural schematic diagram of the flow limiting valve in the present invention.

[0027] In the figure, 100, air cushion conveying assembly; 110, air cushion board; 120, conveying unit; 121, servo motor; 122, ball screw nut pair; 123, slide rail; 130, air suction unit; 131, air suction hole body; 131a, adsorption part; 131b, communication part; 140, sensor unit; 141, sensor;

[0028] 200, gas delivery assembly; 210, gas delivery head; 220, flow limiting valve; 221, valve core; 222, elastic member; 300, roller conveying assembly; 310, roller group. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0030] A sheet film transmission device of a circular knife machine in this embodiment relates to the technical field of circular knife machines. An air cushion plate 110 is arranged between roller groups 310. The air cushion plate 110 can absorb the sheet film, clamp and fix the sheet film, and prevent the sheet film from deflecting.

[0031] See also Figures 1 to 6 In this embodiment, a sheet film transmission device of a circular knife machine includes: an air cushion conveying component 100 and an air delivery component 200. The air cushion conveying component 100 includes an air cushion plate 110 for adsorbing the sheet film, a conveying unit 120 and an air suction unit 130. The air cushion plate 110 is connected to the frame through the conveying unit 120. The conveying unit 120 can drive the air cushion plate 110 to move in a direction perpendicular to the moving direction of the sheet film, thereby adjusting the position of the sheet film relative to the frame, and restoring the dislocation and offset of the sheet film.

[0032] A plurality of groups of suction units 130 arranged in parallel are arranged on the air cushion board 110, and the suction units 130 include a plurality of suction holes 131 arranged in an array. The suction holes 131 can absorb air relative to the sheet film. The plurality of suction holes 131 can form a uniform adsorption force to ensure that the sheet film remains smooth and stable during the transmission process, and prevent the relative slippage of the sheet film, resulting in dislocation and offset.

[0033] The suction holes 131 of two adjacent suction units 130 are relatively staggered, and a separation line is formed when the sheet film and the air cushion board 110 are relatively separated. The separation line only contacts a part of the staggered suction holes 131 at any time. Compared with all the suction holes 131 arranged in an array, the number of suction holes 131 contacting the separation line is reduced by at least half. At the separation line, the adsorption force between the sheet film and the air cushion board 110 is smaller. Under the premise of not changing the overall suction force of the sheet film, the sheet film can be more easily separated from the air cushion board 110, thereby avoiding damage to the sheet film during transportation.

[0034] The gas delivery assembly 200 includes a plurality of gas delivery heads 210 and a flow limiting valve 220. One end of the gas delivery head 210 is inserted into the air suction hole body 131, and the other end of the gas delivery head 210 is connected to the flow limiting valve 220. Each gas delivery head 210 is subjected to the same adsorption pressure. The gas delivery head 210 acting on the sheet membrane is blocked by the sheet membrane, and the gas flow is relatively small. The gas delivery head 210 not acting on the sheet membrane is directly connected to the air, and the flow limiting valve 220 can reduce the flow of the air flow to prevent the gas delivery head 210 not acting on the sheet membrane from interfering with the gas delivery head 210 acting on the sheet membrane, thereby interfering with the adsorption of the gas delivery head 210 on the sheet membrane.

[0035] In some embodiments, see Figures 1 to 4 The suction hole body 131 includes an adsorption portion 131a and a connecting portion 131b. The adsorption portion 131a is elongated relative to the moving direction of the sheet film, which increases the contact area between the suction hole body 131 and the sheet film. Under the same adsorption pressure, the larger contact area can disperse the attraction and provide a more stable and uniform adsorption force.

[0036] The two ends of the adsorption part 131a along the moving direction of the sheet film are gradually reduced. During the separation process between the separation line and the adsorption part 131a, the contact line between the separation line and the adsorption part 131a first gradually becomes longer and then gradually becomes shorter. When the separation line and the adsorption part 131a begin to contact, the contact line is the shortest and the adsorption force is the smallest. The adsorption effect between the adsorption part 131a and the sheet film can be destroyed by the smallest shear force, so that the sheet film can be more easily separated from the air cushion board 110, avoiding damage to the sheet film during transportation. In addition, the contact line first gradually becomes longer and then gradually becomes shorter, which can gradually change the action area of ​​the suction hole body 131 and the sheet film, preventing the sheet film from being subjected to excessive tension or interference during the separation process, thereby reducing the shaking and deviation of the sheet film during the movement process and improving the stability of the transmission process.

[0037] The connecting portion 131b of the air intake hole body 131 connects the adsorption portion 131a with the air delivery head 210, which can ensure that the airflow in the air intake hole body 131 can flow smoothly. When the airflow enters the air intake hole body 131, negative pressure can be quickly formed to provide a stable adsorption force. At the same time, the setting of the connecting portion 131b helps to control the speed and direction of the airflow and reduce interference with the sheet film.

[0038] In a specific implementation process, the adsorption portion 131a is in a diamond or elliptical shape. The diamond or elliptical adsorption portion 131a has a larger contact area, can provide a more uniform adsorption force distribution, and reduce the problem of excessive local adsorption force.

[0039] The adsorption portion 131a is configured to be elliptical or rhombus-shaped, so that the adsorption force gradually weakens at the edge, thereby avoiding damage or wrinkles of the film material caused by excessive adsorption force in the edge area.

[0040] The diamond or elliptical adsorption portion 131a has a natural tapered effect at the edge, which helps to smooth the transition, reduce the air flow interference at the edge, prevent the sheet film from shaking or deflecting during the movement, and improve the stability of the transmission process. At the same time, the tapered edge of the adsorption portion 131a allows the sheet film to gradually weaken the adsorption force at the edge area when it needs to be separated from the air cushion board 110, so that it is easier to separate from the air cushion board 110.

[0041] In some embodiments, the flow limiting valve 220 is a self-operated flow control valve, which can use the pressure change of the medium itself to adjust the flow without external power or complex control system, thereby simplifying the system structure and control logic.

[0042] The self-operated flow control valve can automatically adjust the gas flow to keep it constant within the set range, ensuring that the suction unit 130 always works in the best state, providing stable adsorption force, reducing air flow fluctuations, maintaining the negative pressure of the suction hole body 131 stable, and improving the stability of the sheet film transmission process.

[0043] In the specific implementation process, please refer to Figure 6 The flow limiting valve 220 includes a valve core 221 and an elastic member 222. The end of the elastic member 222 is connected to the valve core 221. The elastic member 222 can respond quickly to pressure changes and drive the valve core 221 to move, thereby achieving precise adjustment of the air flow rate and ensuring that the suction unit 130 maintains a constant adsorption force under different operating conditions.

[0044] The elastic member 222 is specifically a spring. By changing the stiffness and preload of the spring, the flow control range of the valve can be adjusted to meet different production requirements.

[0045] The design of the elastic member 222 and the valve core 221 makes the airflow through the valve smoother and reduces flow fluctuations, thereby ensuring the stability of the adsorption force of the suction unit 130 and preventing the sheet film from being offset or detached due to changes in adsorption force during transmission.

[0046] In some embodiments, see Figure 5 The gas delivery component 200 also includes an air suction system. Each air suction unit 130 is connected to an air suction system. Each air suction system can provide air suction power for an air suction unit 130, so that each unit can independently control the air suction volume. By adjusting the flow limiting valve 220, the air suction volume of each air suction unit 130 can be accurately controlled to meet the adsorption requirements of different areas.

[0047] The suction system includes an air pump, which is connected to the flow limiting valve 220 of multiple suction units 130 through a pipeline, and can provide concentrated and strong suction, thereby enhancing the adsorption capacity of each suction unit 130. The air pump can stably supply air, and each suction unit 130 can continuously generate a stable negative pressure to ensure that the adsorption force of the sheet film is constant during the movement process, reducing the deviation and detachment of the film material.

[0048] During the specific implementation process, multiple groups of air suction units 130 are arranged in parallel, and the arrangement direction of the multiple groups of air suction units 130 is perpendicular to the moving direction of the sheet film. The multiple air suction holes 131 in the covered air suction units 130 act on the sheet film at the same time, and the multiple air suction holes 131 in the uncovered air suction units 130 are all connected to the outside world. The multiple air suction holes 131 acted by a set of air suction systems are all in the same state, covered or not covered by the sheet film, and the gas pressure on the air suction holes 131 remains consistent and relatively stable.

[0049] In some embodiments, see Figure 1 The air cushion conveying assembly 100 also includes a sensor unit 140 and a controller. The sensor unit 140 and the controller are added to the air cushion conveying assembly 100. The edge positions of both sides of the sheet film are sensed by a plurality of sensors 141 arranged equidistantly along a direction perpendicular to the moving direction of the sheet film, and the controller is electrically connected to the sensors 141 and the conveying unit 120 respectively, which can significantly improve the automation and accuracy of the system.

[0050] In the specific implementation process, the sensors 141 are arranged equidistantly along the moving direction of the sheet film, and the sensors 141 can detect the positions of the edges of both sides of the sheet film in real time, and instantly obtain the position information of the sheet film to ensure a rapid response to the deviation. By accurately sensing the edge position of the sheet film through the sensors 141, the controller can quickly adjust the operation of the conveying unit 120 to prevent the sheet film from deviating, misaligning or detaching during the transmission process.

[0051] In addition, during the transmission process, if the sheet film deviates, the system can automatically detect and make corrections to ensure that the sheet film always moves along the predetermined trajectory, thereby improving the accuracy of transmission.

[0052] In some embodiments, see Figure 2 The conveying unit 120 includes a servo motor 121, a ball screw nut pair 122 and a slide rail 123. The slide rail 123 is connected to the frame, and the slider is fixedly connected to the bottom of the air cushion board 110. The slider is slidably connected to the slide rail 123. The slide rail 123 provides a smooth and low-friction guide to ensure that the air cushion board 110 remains stable and linear during movement, reducing vibration and errors during transmission.

[0053] The combination of the servo motor 121 and the ball screw nut pair 122 can achieve high-precision positioning control. The ball screw transmission system has high rigidity and precision, and can convert the rotational motion of the servo motor 121 into the linear motion of the air cushion plate 110, thereby achieving accurate adjustment of the position of the sheet film.

[0054] The servo motor 121 has a high response speed. The servo motor 121 can quickly adjust the movement of the ball screw nut pair 122 according to the instructions of the controller, thereby realizing the rapid displacement of the air cushion plate 110. The servo motor 121 can adjust the position of the air cushion plate 110 in real time according to the information fed back by the sensor 141, keep the two side edges of the sheet film always in the correct position, and improve the stability and accuracy of the transmission.

[0055] The ball screw nut pair 122 can also be an electric push rod to precisely adjust the relative position of the air cushion plate 110 to achieve precise adjustment of the position of the sheet film.

[0056] In some embodiments, a roller conveying assembly 300 is added to the sheet film transmission device of the circular knife machine, and the air cushion conveying assembly 100 is arranged between the two groups of rollers, so that the sheet film can transition smoothly during the transmission process, reducing vibration and jitter during the transmission process and improving the stability of the transmission.

[0057] As a further embodiment, a space for conveying the sheet film is formed in the roller group 310, and the space is arranged coplanar with the air cushion plate 110, so that the sheet film can achieve seamless transition between the roller group 310 and the air cushion conveying assembly 100, ensuring the continuity and stability of the transmission process, and reducing the jitter and vibration that may be generated during the transition process. The consistent height of the sheet film during the transmission process is maintained, avoiding the problem of unstable transmission caused by height difference, reducing the height difference between the sheet film and the roller or air cushion plate 110, reducing friction and mechanical loss, protecting the surface integrity of the sheet film, and extending its service life.

[0058] Workflow: First, check whether the various components of the circular knife machine and the sheet film transmission device are intact, including the roller group 310, the air cushion conveying assembly 100, the air pump, the flow limiting valve 220, the sensor unit 140, the controller, etc. Then, install the sheet film roll on the unwinding device and ensure that the unwinding direction of the sheet film is correct. Next, set the transmission speed, air cushion adsorption force, air flow control parameters of the flow limiting valve 220, etc. on the control panel. Finally, start the sheet film transmission device, observe the operating status of the sheet film during the transmission process, and ensure that it runs smoothly between the roller group 310 and the air cushion conveying assembly 100. The transmission status of the sheet film is monitored in real time through the sensor unit 140 and the controller to ensure that the edge positions of the sheet film on both sides along the transmission path are accurate.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A sheet film transmission device for a circular knife machine, It is characterized in that include: An air cushion conveying assembly, the air cushion conveying assembly comprising an air cushion plate for adsorbing a sheet film, a conveying unit and an air suction unit, the air cushion plate being connected to a frame through the conveying unit, the conveying unit being capable of driving the air cushion plate to move in a direction perpendicular to the moving direction of the sheet film; a plurality of groups of the air suction units arranged in parallel are arranged on the air cushion plate, the air suction unit comprising a plurality of air suction holes arranged in an array, adjacent air suction holes being arranged in a staggered manner, and the air suction holes being capable of sucking air relative to the sheet film; A gas delivery component, the gas delivery component includes multiple gas delivery heads and a flow limiting valve, one end of the gas delivery head is inserted into the air intake hole body, and the other end of the gas delivery head is connected to the flow limiting valve, and the flow limiting valve can limit the flow of gas.

2. A sheet film conveying device for a circular knife machine according to claim 1, It is characterized in that The suction hole body includes an adsorption portion and a connecting portion, the adsorption portion is elongated relative to the moving direction of the sheet film, the two ends of the adsorption portion along the moving direction of the sheet film are gradually contracted, and the two ends of the connecting portion are respectively connected to the adsorption portion and the air delivery head.

3. The sheet film transmission device of the circular knife machine according to claim 2, It is characterized in that The adsorption portion is rhombus-shaped or elliptical-shaped.

4. The sheet film transmission device of the circular knife machine according to claim 1, It is characterized in that The flow limiting valve is a self-acting flow control valve.

5. The sheet film transmission device of the circular knife machine according to claim 4, It is characterized in that The flow limiting valve comprises a valve core and an elastic member, the end of the elastic member is connected to the valve core, and the elastic member can shrink relatively to control the relative movement of the valve core and limit the air flow through the self-operated flow control valve.

6. The sheet film transmission device of the circular knife machine according to claim 1, It is characterized in that The gas delivery assembly also includes an air suction system, each of the air suction units is cooperatively connected to an air suction system, and the air suction system includes an air pump, and the air pump is connected to multiple flow limiting valves of an air suction unit through pipelines.

7. The sheet film transmission device of the circular knife machine according to claim 1, It is characterized in that The air cushion conveying assembly also includes a sensing unit and a controller. The sensing unit includes a plurality of sensors equidistantly arranged in a direction perpendicular to the moving direction of the sheet film. The sensors can sense the edge positions on both sides of the sheet film. The controller is electrically connected to the sensors and the conveying unit, respectively, to adjust the relative positions of the edge positions on both sides of the sheet film.

8. The sheet film conveying device of the circular knife machine according to claim 7, It is characterized in that The conveying unit comprises a servo motor, a ball screw nut pair and a slide rail, the ball screw nut pair and the slide rail are respectively connected to the air cushion plate, and the servo motor is connected to the ball screw nut pair.

9. The sheet film transmission device of the circular knife machine according to claim 1, It is characterized in that It also includes a roller conveying assembly, which includes a roller group for conveying the sheet film, and the air cushion conveying assembly is arranged between two of the roller groups.

10. The sheet film conveying device of the circular knife machine according to claim 9, It is characterized in that A spacing space for conveying a sheet film is formed in the roller group, and the spacing space is arranged coplanar with the air cushion plate.

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