Continuous extraction detection system of soft extraction paper cutting machine

Abstract

The utility model discloses a continuous extraction detection system of a soft extraction paper cutting machine, which comprises a rack, a movable cutter shaft roller and a plurality of movable cutters, and two ends of the movable cutter shaft roller are rotatably mounted on the rack; the fixed cutter shaft roller is provided with at least one fixed cutter, the two ends of the fixed cutter shaft roller are in insulated connection with the rack, and the fixed cutter shaft roller and the movable cutter shaft roller are electrified at low voltage; the signal acquisition module comprises a cutter contact signal detection unit, a signal noise anti-interference isolation unit and an angle detection unit; and the central processing module comprises a central processing unit, and the central processing unit is used for receiving the signals acquired by the signal acquisition module, judging the tangent state of the fixed cutter and the movable cutter according to the acquired signals, and outputting an alarm signal according to the tangent state. The continuous extraction detection and judgment of the soft extraction paper cutting machine are realized, the cutting effect of the current soft extraction paper can be timely and accurately judged, an enterprise is helped to reduce waste paper and waste materials, the working efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of quality inspection technology for soft tissue paper products, specifically to a continuous tissue paper cutting machine inspection system. Background Technology

[0002] The soft tissue paper cutter uses a spiral blade to cut the tissue paper and process it into interlocking folded facial tissues. During production, the paper cutter may not completely cut the paper, resulting in small sections of the paper edges sticking together. The quality of the folded paper after cutting can only be checked manually at regular intervals, such as for sticking or torn edges. This repetitive process not only increases labor intensity but also generates a considerable amount of paper waste. If sticking defects are not detected in time, it can lead to rework, product scrap, raw material waste, high energy consumption, and other problems. The operation is unpredictable and carries considerable risk.

[0003] To address the above issues, Chinese utility model patent CN220699762U discloses a paper-cutting mechanism. By detecting the continuity of the control circuit, it can determine whether the fixed blade and the rotating blade are properly aligned, allowing for immediate detection of malfunctions and timely intervention, thus reducing maintenance time and improving work efficiency. However, relying solely on detecting the continuity of the control circuit cannot accurately determine whether the cutter blade has completely cut the paper, and interference signals from the control circuit can affect the detection results. Therefore, to avoid the shortcomings of the existing technology, it is necessary to improve it. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies in the existing technology and provide a continuous draw detection system for a soft tissue paper cutter with high detection accuracy and fast response speed.

[0005] This utility model is achieved through the following technical solution: a continuous draw detection system for a soft tissue paper cutting machine, comprising...

[0006] frame;

[0007] The moving cutter shaft roller is provided with a plurality of moving cutters, and the two ends of the moving cutter shaft roller are rotatably mounted on the frame;

[0008] The fixed cutter shaft roller is provided with at least one fixed cutter. Both ends of the fixed cutter shaft roller are fixedly mounted on the frame. Both ends of the fixed cutter shaft roller are insulated from the frame. The fixed cutter shaft roller and the moving cutter shaft roller are energized at low voltage.

[0009] The signal acquisition module includes a cutter contact signal detection unit, a signal noise anti-interference isolation unit, and an angle detection unit. The cutter contact signal detection unit is used to detect the tangent state between the fixed cutter and the moving cutter to obtain a level pulse signal. The signal noise anti-interference isolation unit is used to filter out interference signals in the level pulse signal to obtain a standard level pulse signal that can be acquired. The angle detection unit is used to detect the rotation position data information of the moving cutter shaft roller to obtain a position pulse signal.

[0010] The central processing module includes a central processing unit, which receives signals acquired by the signal acquisition module, determines the tangency state between the fixed tool and the moving tool based on the acquired signals, and then outputs an alarm signal based on the tangency state.

[0011] Furthermore, the central processing module also includes an anti-jitter pulse isolation module for filtering jitter interference signals in the level pulse signal. The anti-jitter pulse isolation module includes an RC filter isolation shaping circuit module.

[0012] Furthermore, the central processing module also includes a pulse period recognition unit, used to identify periodically stable pulses, periodically abnormal pulses, and sudden jitter pulses.

[0013] Furthermore, the signal noise anti-interference isolation unit includes a high-speed signal isolator.

[0014] Furthermore, the angle detection unit includes a position encoder.

[0015] Furthermore, it also includes an output display module and an alarm module. The output display module is used to display the data collected by the central processing module, and the alarm module is used to output alarm signals.

[0016] Compared to existing technologies, this invention uses a signal acquisition module to collect cutter tangency status data and position data, and filters out interference signals to obtain a stable standard signal. The central processing module determines the tangency status of the fixed and moving cutters based on the collected signals, and then outputs an alarm signal based on the tangency status. This results in a high accuracy rate in judging cutter abnormalities, effectively improving work efficiency and reducing labor intensity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the soft tissue paper cutting machine of this utility model.

[0019] Figure 2 for Figure 1 A sectional view along the AA direction.

[0020] Figure 3 This is a schematic diagram of the continuous draw detection system for the soft tissue paper cutting machine of this utility model.

[0021] Figure 4 This is the logic diagram of the continuous draw detection system for the soft tissue paper cutting machine of this utility model.

[0022] Figure 5 This is a flowchart of the continuous draw detection system for the soft tissue paper cutting machine of this utility model.

[0023] Figure 6 This refers to the level pulse signal of the continuous draw detection system for the soft tissue paper cutter of this utility model.

[0024] Figure 7 This is the standard level pulse signal for the continuous draw detection system of the soft tissue paper cutter of this utility model.

[0025] In the diagram: 1-Frame; 2-Fixed cutter shaft roller; 3-Fixed cutter; 4-Moving cutter shaft roller; 5-Moving cutter; 6-High-speed signal isolator; 7-Position encoder; 8-Proximity switch; 9-Central processing unit. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 7 The present invention discloses a continuous draw detection system for a soft tissue paper cutter, comprising:

[0028] The machine consists of a frame 1; a moving blade roller 4 with several moving blades 5, both ends of which are rotatably mounted on the frame 1; and a fixed blade roller 2 with at least one fixed blade 3, both ends of which are fixedly mounted on the frame 1. The two ends of the fixed blade roller 2 are insulated from the frame 1, and a low-voltage energizer is connected between the fixed blade roller 2 and the moving blade roller. Specifically, the support seats, swing arms, and connecting mechanisms on both sides of the fixed blade roller 2 are insulated to ensure no conductive contact with the entire frame 1, with an insulation resistance value >0.5MΩ. A 24V / 5V micro-current (7mA) control positive electrode is connected to the fixed blade roller 2, and a negative electrode is installed near the moving blade roller 4. Based on the cutting principle, as long as the fixed blade 3 and the moving blade 5 are detected to be tangentially connected within the working area, corresponding high and low voltage levels will be generated. After shaping and filtering, a standard pulse signal is formed that can be acquired by the PLC. The two ends of the fixed blade roller 2 are insulated from the frame by insulated bearings. The insulation structure is stable and avoids affecting the detection effect when the fixed blade 3 is replaced.

[0029] The signal acquisition module includes a cutter contact signal detection unit, a signal noise anti-interference isolation unit, and an angle detection unit. The cutter contact signal detection unit detects the tangential state between the stationary and moving cutters to obtain a level pulse signal. The signal noise anti-interference isolation unit filters out interference signals from the level pulse signal to obtain a standard level pulse signal that can be acquired. The angle detection unit detects the rotation position data of the moving cutter shaft roller to obtain a position pulse signal. The signal noise anti-interference isolation unit includes a high-speed signal isolator 6. This unit is specifically designed for the folding machine's operating environment and incorporates enhanced electromagnetic interference protection measures, including a combination of an isolation transformer, power filter, anti-interference magnetic ring, and shielded twisted-pair cable. The angle detection unit includes a position encoder 7. The cutting machine can use the original position encoder 7 and add a proximity switch 8 to achieve cutter position, grouping area, sheet count, and pulse edge position capture.

[0030] The central processing module includes a central processing unit 9, which receives signals acquired by the signal acquisition module, determines the tangency state of the fixed and moving blades based on the acquired signals, and outputs an alarm signal based on the tangency state. The central processing module also includes an anti-jitter pulse isolation module, used to filter jitter interference signals in the level pulse signal. This module includes a resistor-capacitor (RC) filter isolation and shaping circuit module to prevent interference signals generated by cutter jitter from affecting the output results. The anti-jitter pulse isolation module is an RC filter isolation and shaping circuit module designed to meet the jitter frequency and detection accuracy requirements of the fixed and moving blades in the folding machine. It has hardware processing functions such as current limiting, anti-jitter, isolation, and shaping. The central processing unit 9 can be a microcontroller or PLC system, detecting external encoder signals, proximity switch 8 signals, and cutter contact signals, completing system signal sampling input, status logic judgment, and continuous draw alarm output.

[0031] The central processing module also includes a pulse period identification unit, used to identify periodically stable pulses, periodically abnormal pulses, and sudden jitter pulses. One rotation of the moving cutter shaft roller is divided into several intervals, each corresponding to an interval pulse. By detecting the pulses of several consecutive rotations of these intervals, the pulse type of that interval is identified. This invention uses hardware interrupts to capture pulse edges, dynamically detects the number and width of pulses, and performs logical analysis to determine whether there is continuous tapping, outputting an alarm based on the judgment criteria.

[0032] The system includes an output display module and an alarm module. The output display module displays data collected by the central processing module, and the alarm module outputs alarm signals. The output display module can be a touch screen, an industrial computer, or an intelligent human-machine interface product. It has equipment digitization capabilities and performs functions such as communication sampling, human-machine interaction, data storage, anomaly screening, status classification, historical data retrieval, and alarm display.

[0033] The continuous draw detection system is used to detect continuous draws during the paper cutting process of a paper cutter, preventing paper waste caused by incomplete cuts. The specific testing method involves detecting the number of pulses from the paper cutters on the two main shafts. Each pulse can be considered as one pulse from a single paper cutter on the shaft, and the operating status is displayed on a touchscreen in the form of data and waveforms.

[0034] A method for continuous tissue box cutting machine detection includes the following steps.

[0035] Step (1): Insulate both ends of the fixed cutter shaft roller from the machine frame and apply low-voltage power between the fixed cutter shaft roller and the moving cutter shaft roller;

[0036] Step (2): The information acquisition module acquires the tangential state data of the fixed and moving cutters and the rotation position data of the moving cutter shaft roller, and filters the interference signals in the acquired data to obtain the standard signal that can be acquired; the anti-jitter pulse isolation module filters the jitter interference signals in the level pulse signal. The cutting blade contact signal detection unit detects the tangential state of the fixed and moving cutters to obtain the level pulse signal, and the signal noise anti-interference isolation unit filters the interference signals in the level pulse signal to obtain the standard level pulse signal that can be acquired; the angle detection unit detects the rotation position data of the moving cutter shaft roller to obtain the position pulse signal.

[0037] Step (3): The central processing module determines the tangent state and tangent position of the fixed tool and the moving tool based on the standard signal collected in step (2), and then outputs an alarm signal based on the tangent state and tangent position.

[0038] The moving cutter shaft roller is divided into several intervals after rotating one revolution. Each interval corresponds to an interval pulse. The central processing module in step (3) obtains the types of interval pulses through the pulse period recognition unit, namely, periodic stable pulse, periodic abnormal pulse and sudden jitter pulse. The interval pulse type obtained by the pulse period recognition unit is the interval pulse that is detected for several consecutive revolutions.

[0039] In one specific embodiment, the fixed blade roller of this utility model is equipped with one cutter, and the moving blade roller is equipped with six cutters. The number of pulses per revolution can be set to simulate the length traveled in one revolution. For example, if the number of pulses per revolution is set to 12000, the length traveled by each cutter on the moving blade roller is 2000.

[0040] When continuous paper cutting occurs, the system will sample and judge multiple times. If it occurs repeatedly at the same position, the corresponding paper cutter data will stabilize within a certain value range. At the same time, the output display module will show waveform changes at the corresponding data position. At this time, the system will determine that it is a continuous cutting state and issue an alarm. This function can modify the number of judgment cycles and length deviation according to the actual situation, that is, change the judgment conditions by adjusting the pulse coefficient and pulse width coefficient. The core of this detection method is to use pulses to simulate the length traveled in one revolution of the main shaft, and then subdivide it down to each paper cutter. When paper cutter vibration interference occurs, this abnormal interference can be filtered out by repeated position detection, thereby ensuring the accuracy of continuous cutting detection. This method can adjust the insulation treatment method according to different machine models, and is suitable for online continuous cutting detection and judgment needs of all paper cutting machines. Moreover, it can expand the acquisition of all online statuses of the machine, including but not limited to the vibration and temperature of the embossing shaft, the speed of the tension roller, the action status of electric cylinders, pneumatic cylinders, hydraulic cylinders, and other operating statuses of various cutting and folding machines, realizing the digital transformation of equipment.

[0041] The continuous sampling inspection system offers advantages such as rapid data processing, accurate anomaly detection, and intuitive status display. It helps businesses reduce waste paper and materials, improve work efficiency, and reduce labor intensity.

[0042] Test and execution results:

[0043] 1. Adjust one of the fixed or moving blades to set three points (left, center, and right) to simulate the separation of bad spots, with a width of approximately 1mm to 5mm. At a machine speed of 100m / M, all of them can correctly detect paper-connecting bad spots.

[0044] 2. Single-point test: Adjust the fixed blade and the power half-disengagement state, that is, the distance between the two cutters is about 0.01MM, about 1mm wide, and the machine speed is 100m / M. All paper-connecting defects can be detected correctly.

[0045] III. The testing equipment operates normally around the clock at a machine speed of 110 m / m. It does not interfere with other equipment during operation. All the above tests can detect both micro-connected and wide-connected paper with high accuracy.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous draw detection system for a soft tissue paper cutter, characterized in that: include frame; The moving cutter shaft roller is provided with a plurality of moving cutters, and the two ends of the moving cutter shaft roller are rotatably mounted on the frame; The fixed cutter shaft roller is provided with at least one fixed cutter. Both ends of the fixed cutter shaft roller are fixedly mounted on the frame. Both ends of the fixed cutter shaft roller are insulated from the frame. The fixed cutter shaft roller and the moving cutter shaft roller are energized at low voltage. The signal acquisition module includes a cutter contact signal detection unit, a signal noise anti-interference isolation unit, and an angle detection unit. The cutter contact signal detection unit is used to detect the tangent state between the fixed cutter and the moving cutter to obtain a level pulse signal. The signal noise anti-interference isolation unit is used to filter out interference signals in the level pulse signal to obtain a standard level pulse signal that can be acquired. The angle detection unit is used to detect the rotation position data information of the moving cutter shaft roller to obtain a position pulse signal. The central processing module includes a central processing unit, which receives signals acquired by the signal acquisition module, determines the tangency state between the fixed tool and the moving tool based on the acquired signals, and then outputs an alarm signal based on the tangency state.

2. The continuous draw detection system for a soft tissue paper cutter according to claim 1, characterized in that: The central processing module also includes an anti-jitter pulse isolation module for filtering jitter interference signals in the level pulse signal. The anti-jitter pulse isolation module includes an RC filter isolation shaping circuit module.

3. The continuous draw detection system for a soft tissue paper cutter according to claim 1, characterized in that: The central processing module also includes a pulse period recognition unit, used to identify periodically stable pulses, periodically abnormal pulses, and sudden jitter pulses.

4. The continuous draw detection system for a soft tissue paper cutter according to claim 1, characterized in that: The signal noise immunity isolation unit includes a high-speed signal isolator.

5. The continuous draw detection system for a soft tissue paper cutter according to claim 1, characterized in that: The angle detection unit includes a position encoder.

6. The continuous draw detection system for a soft tissue paper cutter according to claim 1, characterized in that: It also includes an output display module and an alarm module. The output display module is used to display the data collected by the central processing module, and the alarm module is used to output alarm signals.

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