Paper anti-warping slitting and rewinding device

Abstract

The utility model discloses a kind of paper anti-warping slitting rewinding devices, the device is based on traditional slitting rewinding device, additionally add a shell and a local controller, the shell contains all components of device, can insulate the influence of external environment to device, the shell is internally provided with independent constant temperature and humidity control device, and is provided with the ventilation passage that can be communicated with workshop environment, through cover humidity sensor and on-line warping detection unit, in combination with local controller, realize the accurate regulation of cover microenvironment and the dynamic compensation to paper tension, the local controller is also electrically connected with central controller, can receive workshop temperature and humidity data from central controller, and compare with cover data, so that it is maintained in a more accurate target range on the basis of workshop reference environment, increase regulation accuracy.

Description

Technical Field

[0001] This utility model relates to the field of paper processing machinery technology, and in particular to a slitting and rewinding device. Background Technology

[0002] During paper production and processing, especially in key processes such as slitting and rewinding, paper is highly susceptible to warping and deformation due to changes in environmental temperature and humidity or uneven moisture content, severely affecting the quality and efficiency of subsequent printing, packaging, and other deep processing. As a core piece of equipment in the downstream process of paper processing, the stability of the working environment of the slitting and rewinding device is crucial to the flatness of the finished paper roll.

[0003] Currently, the industry commonly adopts the approach of indirectly influencing the temperature and humidity of the equipment operating area by controlling the environment of the entire production workshop, i.e., relying on the workshop's central air conditioning or large-scale constant temperature and humidity systems to establish a unified environmental benchmark. However, this macro-environmental control method has obvious limitations: First, maintaining constant temperature and humidity in a large space consumes a huge amount of energy; second, factors such as different areas within the workshop, the heat generated by the equipment itself, and personnel movement can create local microenvironments, causing deviations in the actual working area of ​​the slitting and rewinding device from the overall workshop environment, resulting in insufficient control precision; third, the fiber structure and stress distribution of paper change at the moment of slitting and rewinding, making it extremely sensitive to fluctuations in the surrounding temperature and humidity, and macro-environmental control cannot respond to these instantaneous local changes in a timely and accurate manner.

[0004] Furthermore, most existing slitting and rewinding equipment has an open structure, with its slitting, guide rollers, and winding areas directly exposed to the workshop environment, lacking an independent, enclosed, and controlled environment. This makes the paper directly susceptible to external environmental fluctuations and airflow interference during processing, exacerbating the risk of warping. Although some equipment is equipped with tension adjustment mechanisms to cope with warping, this is "post-event compensation" and cannot prevent warping from occurring at its source.

[0005] Therefore, there is an urgent need in this field for a solution that can provide a highly stable, independent local environment for the paper slitting and rewinding process, so as to achieve proactive prevention and precise control of paper warping problems. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a paper anti-warping slitting and rewinding device to solve the technical problem of paper warping during the slitting and rewinding process caused by fluctuations in ambient temperature and humidity.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A paper anti-warping slitting and rewinding device includes a frame, an unwinding roller, a guide roller assembly, a slitting mechanism, and a rewinding roller mounted on the frame. It also includes a housing and a local controller. The housing is mounted on the frame and encloses all components mounted on the frame to form a sealed environment. An online warping detection unit for real-time detection of paper flatness is fixedly installed inside the housing. Tension adjustment mechanisms are provided between the unwinding roller and the guide roller assembly, and between the rewinding roller and the guide roller assembly. The signal output terminal of the online warping detection unit is electrically connected to the signal input terminal of the local controller, and the control output terminal of the local controller is connected to the control terminal of the tension adjustment mechanism.

[0008] As a further technical solution of this utility model, the tension adjustment mechanism includes a fixed roller, a floating roller, a first servo motor and a first telescopic cylinder. There are two fixed rollers, both of which are fixedly installed on the frame and at the same horizontal height as the guide roller group. The floating roller is located between the two fixed rollers and its lower end is connected to the first telescopic cylinder. The first servo motor is connected below the first telescopic cylinder and is fixed on the frame.

[0009] As a further technical solution of this utility model, the interior of the housing is provided with an independent constant temperature and humidity control device, which includes a heater, a humidifier and a dehumidifier.

[0010] As a further technical solution of this utility model, an internal temperature and humidity sensor is fixedly installed inside the housing.

[0011] As a further technical solution of this utility model, the temperature and humidity sensor inside the cover is electrically connected to the local controller, and the local controller is electrically connected to the constant temperature and humidity control device.

[0012] As a further technical solution of this utility model, the local controller is also electrically connected to a central controller, and the central controller is electrically connected to a main constant temperature and humidity air conditioning system and a workshop temperature and humidity sensor.

[0013] As a further technical solution of this utility model, a ventilation channel communicating with the outside is provided on the side wall of the housing, and an air valve for controlling the airflow is provided in the ventilation channel.

[0014] As a further technical solution of this utility model, the slitting mechanism includes several blades, a rotating seat, several suction pipes, a connecting shaft and a fixed seat. The blades are detachably connected to the rotating seat. The suction pipes are fixed on the rotating seat and located in the middle of two adjacent blades. The rotating seat is connected to the fixed seat through the connecting shaft. The fixed seat is fixed on the frame through the shaft seat.

[0015] As a further technical solution of this utility model, the bearing includes a second servo motor, a second telescopic cylinder and a transmission shaft. The second servo motor is fixed on the frame, the second telescopic cylinder is fixed on the upper end of the second servo motor, the transmission shaft is fixed on the upper end of the second telescopic cylinder, the upper end of the transmission shaft is connected to the fixed seat, and a dust removal pipe is provided inside the bearing.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting up independent and precisely controllable constant temperature and humidity environments for key areas of the slitting and rewinding device, the influence of external environmental fluctuations is effectively isolated, fundamentally reducing paper warping caused by uneven moisture absorption or drying; combined with online detection and automatic control systems, real-time monitoring and proactive intervention of paper flatness are achieved, significantly improving product quality and production stability; the coordinated control of the device's microenvironment and the workshop's macroenvironment not only increases control precision but also reduces energy consumption; the presence of the dust extraction pipe can absorb and discharge dust and particles generated during the paper cutting process, maintaining the cleanliness of the device's internal environment and extending the device's service life. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram showing the connection between the cutting mechanism and the bearing seat in an embodiment of this utility model.

[0019] Figure 3 This is a block diagram of the control system connection according to an embodiment of the present utility model.

[0020] The components are as follows: 1-Frame; 2-Unwinding roller; 3-Guide roller group; 4-Slitting mechanism; 41-Blade; 42-Rotating seat; 43-Dust suction pipe; 44-Connecting shaft; 45-Fixed seat; 5-Take-up roller; 6-Housing; 7-Constant temperature and humidity control device; 71-Heater; 72-Humidifier; 73-Dehumidifier; 8-Ventilation channel; 81-Air valve; 9-Online warpage detection unit; 10-Indoor temperature and humidity sensor; 11-Tension adjustment mechanism; 111-Fixed roller; 112-Floating roller; 113-First servo motor; 114-First telescopic cylinder; 12-Local controller; 13-Shaft seat; 131-Second servo motor; 132-Second telescopic cylinder; 133-Drive shaft; 100-Central controller; 200-Main constant temperature and humidity air conditioning system; 300-Workshop temperature and humidity sensor. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0022] like Figure 1 As shown, a paper anti-warping slitting and rewinding device includes a frame 1, an unwinding roller 2, a guide roller group 3, a slitting mechanism 4, and a rewinding roller 5. These components are arranged in sequence according to the paper's travel path: the paper is released from the unwinding roller 2, guided by the guide roller group 3 to the slitting mechanism 4 for slitting, and then reaches the rewinding roller 5 for rewinding through the subsequent guide roller group 3.

[0023] like Figure 1As shown, the key improvement in this embodiment is the addition of a housing 6 and a local controller 12. The housing 6 is preferably made of heat- and moisture-proof material. The housing 6 is fixedly mounted on the frame 1, enclosing all components of the device and isolating them from the external environment to form a sealed chamber. To achieve real-time monitoring of the warp of the processed paper, an online warp detection unit 9 is also installed inside the housing 6 for real-time monitoring of paper warp. The online warp detection unit 9, based on laser displacement sensing or machine vision technology, performs non-contact scanning of the passing paper, quantifies its warp degree by analyzing the undulations or deformations of the paper surface, and converts the detected paper warp information into an electrical signal, which is transmitted to the local controller 12. This provides feedback for the local controller 12 to regulate the tension adjustment mechanism 11 and / or the constant temperature and humidity control device 7. High-precision tension adjustment mechanisms 11 are configured between the unwinding roller 2 and the guide roller group 3, and between the winding roller 5 and the guide roller group 3. Each tension adjustment mechanism 11 includes a fixed roller 111, a floating roller 112, a first servo motor 113, and a first telescopic cylinder 114. There are two fixed rollers 111, both fixedly mounted on the frame 1 at the same horizontal height as the guide roller group 3. The floating roller 112 is located between the two fixed rollers 111, and its lower end is connected to the first telescopic cylinder 114. The first servo motor 113 is connected below the first telescopic cylinder 114 and is fixed to the frame 1. The first telescopic cylinder 114, receiving power from the first servo motor 113, can drive the floating roller 112 to move vertically, thereby adjusting the tension of the produced paper. By increasing or decreasing the tension, the shrinkage or expansion of the paper caused by environmental changes can be compensated, thus reducing warping. The local controller 12, using a PLC model, is integrated on or near the frame 1. The signal output terminal of the online warp detection unit 9 is connected to the signal input terminal of the local controller 12, and the control output terminal of the local controller 12 is connected to the control terminal of the tension adjustment mechanism 11. The local controller 12 receives paper flatness data from the online warp detection unit 9. When warp is detected, the local controller 12 compensates and corrects by adjusting the set value of the tension adjustment mechanism 11, for example, by increasing the winding tension to flatten the paper or decreasing the unwinding tension to release stress. This achieves localized closed-loop automatic control from data acquisition and processing to execution.

[0024] like Figure 1As shown, the housing 6 houses an independent temperature and humidity control device 7, which may include a heater 71, a humidifier 72, and a dehumidifier 73. For example, in a dry environment, the humidifier 72 can be activated to increase the humidity inside the enclosure; in a humid environment, the dehumidifier 73 can be activated to reduce the humidity. The heater 71 can be used to raise the temperature in low-temperature environments. The selection and layout of the temperature and humidity control device 7 can be adjusted according to actual production needs, for example, by adopting a compact modular design to reduce space occupation. This design gives the system a high degree of flexibility, enabling it to operate independently or in combination according to the specific type of paper being processed and the process requirements, to rapidly raise the temperature, precisely humidify, or efficiently dehumidify the environment inside the enclosure, ensuring that the microenvironment remains stable within the preset optimal parameter range.

[0025] like Figure 1 As shown, in order to further optimize control, the inside of the housing 6 is also equipped with an internal temperature and humidity sensor 10 for monitoring the core parameters of the microenvironment. The internal temperature and humidity sensor 10 is used to detect the temperature and humidity parameters inside the housing and transmit the detected parameters to the local controller 12 through data communication. The local controller 12 then controls the constant temperature and humidity control device 7 to regulate the environment inside the housing so that the environmental parameters inside the housing are kept within the preset optimal parameter range.

[0026] like Figure 3 As shown, the local controller 12 is also electrically connected to a central controller 100. The central controller 100 is connected to a main constant temperature and humidity air conditioning system 200 and workshop temperature and humidity sensors 300. The workshop temperature and humidity sensors 300 are distributed in different locations in the workshop, such as on the ceiling, walls, or next to equipment, to monitor the overall temperature and humidity distribution of the workshop. Based on the data from the workshop temperature and humidity sensors 300, the central controller 100 controls the operation of the main constant temperature and humidity air conditioning system 200 through a PID algorithm to maintain the workshop in a stable baseline environment, for example, a temperature of 22±2℃ and a humidity of 50±5%RH. The local controller 12 communicates with the central controller 100 in real time, sharing environmental data and equipment status. If the workshop environment changes abruptly, the central controller 100 can issue an early warning, and the local controller 12 can adjust the environment inside the enclosure in advance to reduce interference. The process of the local controller 12 adjusting the environment inside the enclosure is as follows: receiving data from the temperature and humidity sensors 10 inside the enclosure and comparing it with the workshop baseline environment data from the central controller 100. If the parameters inside the enclosure deviate from the target range, for example, the target temperature is 22±0.5℃ and the humidity is 50±1%RH, the constant temperature and humidity control device 7 will be activated for fine-tuning. For example, if the humidity inside the enclosure is lower than the target, the humidifier 72 will be activated; if the temperature is too high, cool air from the workshop can be introduced through the ventilation duct 8 or the output power of the heater 71 can be reduced.

[0027] like Figure 1As shown, a ventilation channel 8 communicating with the external workshop environment is provided on the side wall of the housing 6, allowing air circulation between the inside and outside of the housing 6. This ventilation channel 8, communicating with the external workshop environment, is used to balance the air pressure inside and outside the enclosure and to introduce reference air. An air valve 81 is installed inside the ventilation channel 8, preferably an electrically or pneumatically controlled valve, used to open or close the ventilation channel 8 as needed. When the constant temperature and humidity control device 7 is running, the air valve 81 can be closed to isolate external interference; when the environment inside the enclosure is stable, the air valve 81 can be opened to save energy.

[0028] like Figure 2 As shown, the slitting mechanism 4 includes several blades 41, a rotating seat 42, several suction pipes 43, a connecting shaft 44, and a fixed seat 45. The several blades 41 are evenly distributed on the rotating seat 42 and are detachably connected to the rotating seat 42. The blades 41 are made of different materials to meet the paper cutting needs of different papers. The several suction pipes 43 are fixed on the rotating seat 42 and located in the middle of two adjacent blades 41, which can absorb dust, particles and other substances generated during the paper cutting process. The rotating seat 42 is connected to the fixed seat 45 through the connecting shaft 44, and the fixed seat 45 is fixed to the frame 1 through the shaft seat 13.

[0029] like Figure 2 As shown, the bearing seat 13 includes a second servo motor 131, a second telescopic cylinder 132, and a drive shaft 133. The second servo motor 131 is fixed on the frame 1, the second telescopic cylinder 132 is fixed on the upper end of the second servo motor 131, and the drive shaft 133 is fixed on the upper end of the second telescopic cylinder 132. The upper end of the drive shaft 13 is connected to the fixed seat 45. A dust removal pipe is provided inside the bearing seat 13. The presence of the bearing seat 13 can drive the slitting mechanism 4 to complete the paper cutting task, and can also discharge the dust and particles sucked up by the dust suction pipe 43 to the device.

[0030] During normal production, paper is released from the unwind roller 2, guided by the guide roller group 3 to the slitting mechanism 4 for slitting, and then enters the area covered by the housing 6. The environment inside the housing is maintained stable by the constant temperature and humidity control device 7, and the online warping detection unit 9 monitors the paper status in real time. If environmental parameters fluctuate or paper warping occurs, the local controller 12 automatically adjusts the constant temperature and humidity control device 7 or the tension adjustment mechanism 11 to ensure that the paper on the take-up roller 5 is flat. Furthermore, the presence of the dust extraction pipe 43 ensures the cleanliness of the environment during the paper cutting process. Simultaneously, the ventilation channel 8 and the air valve 81 adjust the air exchange inside and outside the housing as needed to save energy. The entire device achieves efficient and precise anti-warping control through the collaboration of the central controller 100 and the local controller 12.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A paper anti-warping slitting and rewinding device, comprising a frame (1), an unwinding roller (2), a guide roller group (3), a slitting mechanism (4), and a take-up roller (5) mounted on the frame (1), characterized in that: It also includes a housing (6) and a local controller (12). The housing (6) is installed on the frame (1) and encloses all the components installed on the frame (1) to form a sealed environment. An online warping detection unit (9) for real-time detection of paper flatness is fixedly installed inside the housing (6). Tension adjustment mechanisms (11) are provided between the unwinding roller (2) and the guide roller group (3) and between the winding roller (5) and the guide roller group (3). The signal output terminal of the online warping detection unit (9) is electrically connected to the signal input terminal of the local controller (12). The control output terminal of the local controller (12) is electrically connected to the control terminal of the tension adjustment mechanism (11).

2. The paper anti-warping slitting and rewinding device according to claim 1, characterized in that: The tension adjustment mechanism (11) includes a fixed roller (111), a floating roller (112), a first servo motor (113), and a first telescopic cylinder (114). There are two fixed rollers (111), both of which are fixedly installed on the frame (1) and at the same horizontal height as the guide roller group (3). The floating roller (112) is located between the two fixed rollers (111) and its lower end is connected to the first telescopic cylinder (114). The first servo motor (113) is connected below the first telescopic cylinder and is fixed on the frame (1).

3. The paper anti-warping slitting and rewinding device according to claim 1, characterized in that: The housing (6) is equipped with an independent constant temperature and humidity control device (7), which includes a heater (71), a humidifier (72) and a dehumidifier (73).

4. The paper anti-warping slitting and rewinding device according to claim 3, characterized in that: An internal temperature and humidity sensor (10) is fixedly installed inside the housing (6).

5. The paper anti-warping slitting and rewinding device according to claim 4, characterized in that: The temperature and humidity sensor (10) inside the cover is electrically connected to the local controller (12), and the local controller (12) is electrically connected to the constant temperature and humidity control device (7).

6. The paper anti-warping slitting and rewinding device according to claim 1, characterized in that: The local controller (12) is also electrically connected to a central controller (100), which is electrically connected to a main constant temperature and humidity air conditioning system (200) and a workshop temperature and humidity sensor (300).

7. The paper anti-warping slitting and rewinding device according to claim 1, characterized in that: The side wall of the housing (6) is provided with a ventilation channel (8) that communicates with the outside. A wind valve (81) for controlling the airflow is provided in the ventilation channel (8).

8. The paper anti-warping slitting and rewinding device according to claim 1, characterized in that: The cutting mechanism (4) includes several blades (41), a rotating seat (42), several suction pipes (43), a connecting shaft (44), and a fixed seat (45). The blades (41) are detachably connected to the rotating seat (42). The suction pipes (43) are fixed on the rotating seat (42) and located in the middle of two adjacent blades. The rotating seat (42) is connected to the fixed seat (45) through the connecting shaft (44). The fixed seat (45) is fixed on the frame (1) through the bearing seat (13).

9. The paper anti-warping slitting and rewinding device according to claim 8, characterized in that: The bearing seat (13) includes a second servo motor (131), a second telescopic cylinder (132), and a drive shaft (133). The second servo motor (131) is fixed on the frame, the second telescopic cylinder (132) is fixed on the upper end of the second servo motor (131), and the drive shaft (133) is fixed on the upper end of the second telescopic cylinder (132). The upper end of the drive shaft (133) is connected to the fixed seat (45). A dust removal pipe is provided inside the bearing seat (13).

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