Adjustable stretching device for matt film preparation

Abstract

The utility model relates to the technical field of film stretching equipment, in particular to a matt film preparation adjustable stretching device which comprises a supporting frame, a material guiding assembly, a stretching module, an adjusting assembly and a heating unit. The stretching speed and position are dynamically adjusted through the adjusting assembly, the temperature of the film is controlled in combination with the heating unit, and the problem that the surface is uneven or fractured in the stretching process is effectively solved. Meanwhile, a monitoring mechanism and a damping assembly are arranged, so that the operation stability and safety of the equipment are improved. The drawing process can be optimized in real time according to the material characteristics, the efficient and intelligent production requirements are met, and the method is suitable for matt film preparation in the variable environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of film processing equipment, specifically to a adjustable stretching device for matt film preparation. BACKGROUND

[0002] When some matt films are prepared, corresponding stretching devices need to be used to realize the performance optimization of the film, so efficient stretching equipment needs to be adopted. The film is directionally stretched through the stretching device, so as to improve its mechanical performance and optical performance. However, some existing stretching devices rely on fixed stretching parameter settings in the actual use process, and it is difficult to adjust the stretching speed and temperature in real time according to the material characteristics, so that some films may appear surface unevenness or breakage during the stretching process, affecting the quality stability of the final product.

[0003] After searching, the patent document with publication number CN115556451B discloses a low-temperature heat-seal bidirectional stretching polypropylene matt film and its preparation method and application. However, it also has the same problem in the use process.

[0004] In addition, another patent document with publication number CN113736172B discloses a polypropylene composition, a polypropylene film and a preparation method thereof. Its stretching process also adopts fixed parameter settings, and does not consider the stress change characteristics of different materials, which may not be able to fully release the residual stress inside the film, thereby affecting the consistency of mechanical performance and optical performance. The above situation shows that the traditional stretching equipment on the market still has room for improvement in terms of precise control and flexible adaptation to diversified needs.

[0005] Therefore, the utility model provides a adjustable stretching device for matt film preparation to meet the production needs in efficient, intelligent and variable environments. UTILITY MODEL CONTENTS

[0006] The utility model provides a adjustable stretching device for matt film preparation, aims at solving the problem that the existing stretching equipment is difficult to adjust the stretching parameters in real time according to the material characteristics in the actual use process, so as to avoid the surface unevenness or breakage of the film during the stretching process. In order to achieve the above purpose, the utility model is realized in this way, a adjustable stretching device for matt film preparation, comprising: a support frame fixedly installed on the base, a material guiding assembly for conveying and guiding the film is arranged on the support frame; a stretching module slidingly installed on the support frame, the stretching module is used for applying controllable stretching force to the film; an adjusting assembly arranged on the support frame, the adjusting assembly is used for dynamically adjusting the stretching speed and position of the stretching module; and a heating unit fixedly installed on the support frame, the heating unit is used for temperature control of the film to match the stretching process.

[0007] Preferably, the material guiding assembly comprises: a first guide roller set and a second guide roller set fixedly installed on the top of the support frame, a gap is arranged between the first guide roller set and the second guide roller set, and the gap is used for preliminarily defining the running path of the film; a tensioning roller rotatably installed on the support frame, the tensioning roller is located between the first guide roller set and the second guide roller set, and the outer wall of the tensioning roller is in contact with the film, so as to adjust the tension of the film; and a limiting plate fixedly installed on the support frame, the limiting plate is arranged on the two sides of the first guide roller set and the second guide roller set, and is used for preventing the film from deviating during running.

[0008] Preferably, the stretching module comprises: a stretching frame slidably installed on the support frame, the stretching frame is connected with the support frame through a sliding rail, and the sliding rail extends in the horizontal direction; a driving motor fixedly installed on the stretching frame, a transmission gear is fixedly connected to the output shaft of the driving motor; a rack meshingly installed on the transmission gear, the rack is fixedly installed on the support frame, and the rack is arranged in the extension direction of the sliding rail; and a stretching roller set arranged on the stretching frame, the stretching roller set comprises two oppositely arranged stretching rollers, the stretching rollers are rotatably connected with the stretching frame through bearings, and the outer wall of the stretching rollers is in contact with the film, so as to apply a stretching force to the film.

[0009] Preferably, the adjusting assembly comprises: a servo motor fixedly installed on the support frame, a lead screw is fixedly connected to the output shaft of the servo motor; a moving block threadedly connected to the lead screw, the moving block is fixedly connected with the stretching frame; a guide rod arranged on the support frame, the guide rod penetrates through the moving block and is slidably connected with the moving block, so as to limit the movement direction of the moving block; and a sensor module fixedly installed on the support frame, the sensor module is used for detecting the position information of the stretching module and feeding back to the control system.

[0010] Preferably, the heating unit comprises: a heating box fixedly installed on the support frame, a heating cavity is arranged in the heating box, and the heating cavity is used for accommodating the film; an electric heating tube fixedly installed on the inner wall of the heating box, the electric heating tubes are uniformly distributed in the circumferential direction of the heating cavity; and a temperature control module arranged on the heating box, the temperature control module comprises a temperature sensor fixedly installed on the outer wall of the heating box and a controller, the temperature sensor is used for detecting the temperature in the heating cavity, and the controller is used for adjusting the power of the electric heating tube according to the detection result of the temperature sensor.

[0011] Preferably, a monitoring mechanism for monitoring the running state of the stretching module is arranged on the support frame, which comprises a camera fixedly installed on the support frame, the lens of the camera facing the working area of the stretching module; a display screen fixedly installed on the support frame, the display screen being signal connected with the camera for displaying the working state of the stretching module; an alarm arranged on the support frame, the alarm being signal connected with the sensor module for issuing an alarm when the stretching module exceeds the preset working range.

[0012] Preferably, the stretching module further comprises a pressure sensor fixedly installed on the stretching frame, the pressure sensor being in contact with the stretching roller set for detecting the pressure applied by the stretching roller set on the film; an adjusting screw fixedly installed on the stretching frame, one end of the adjusting screw being connected with the stretching roller set and the other end penetrating through the stretching frame and being threadedly connected with the stretching frame for fine adjustment of the position of the stretching roller set.

[0013] Preferably, a damping assembly is arranged at the bottom of the support frame, which comprises a damping column fixedly installed on the base, the top end of the damping column being fixedly connected with the support frame; a damping spring sleeved on the damping column, the two ends of the damping spring being in contact with the base and the support frame respectively for absorbing the vibration generated by the support frame during operation.

[0014] Preferably, an access opening is formed in the support frame, the access opening being located below the stretching module for maintenance and repair of the stretching module; a protective door is hingedly connected to the access opening, the protective door being fixedly connected with the support frame through a lock catch for closing the access opening during equipment operation.

[0015] Preferably, the material guiding assembly further comprises a cleaning brush fixedly installed on the support frame, the bristles of the cleaning brush being in contact with the outer wall of the first and second guide roller sets for removing impurities on the surface of the guide roller sets; a lubricating device arranged on the support frame, the lubricating device comprising an oil storage tank and an oil delivery pipe, the oil storage tank being fixedly installed on the support frame, one end of the oil delivery pipe being connected with the oil storage tank and the other end extending to the bearing of the guide roller set for lubricating the rotating parts of the guide roller set.

[0016] Compared with the prior art, the stretchable device for preparing the extinction film provided by the scheme can adjust the stretching speed and temperature in real time according to the material properties of the film, so that the uneven surface or the rupture of the film in the stretching process is avoided. At the same time, by setting the monitoring mechanism and the damping component, the stability and safety of the equipment operation are improved, and the production demand in the efficient, intelligent and variable environment is met. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model, which shows the main components and layout of the stretching device, including the support frame, the material guiding assembly, the stretching module and the heating unit.

[0018] Figure 2 It is a local enlarged view of the stretching module, which shows the connection relationship and working mode of the stretching frame, the driving motor, the transmission gear, the rack and the stretching roller group in detail.

[0019] Figure 3 It is a structure schematic view of the adjusting assembly, which mainly presents the cooperation structure of the servo motor, the lead screw, the moving block and the guide rod, and the dynamic adjustment function of the stretching module position.

[0020] Figure 4 It is an internal structure sectional view of the heating unit, which shows the arrangement form of the heating box, the electric heating tube, the temperature control module and the temperature sensor and their relative positions with the film.

[0021] Figure 5 It is a layout schematic view of the monitoring mechanism, which shows the installation positions of the camera, the display screen and the alarm and their corresponding relationship with the working area of the stretching module.

[0022] The reference signs are as follows:

[0023] 1, support frame; 2, material guiding assembly; 3, stretching module; 4, heating unit; 5, adjusting assembly; 6, first guide roller group; 7, second guide roller group; 8, tensioning roller; 9, stretching frame; 10, driving motor; 11, transmission gear; 12, rack; 13, stretching roller group; 14, servo motor; 15, lead screw; 16, moving block; 17, guide rod; 18, heating box; 19, electric heating tube; 20, temperature control module; 21, camera; 22, display screen; 23, alarm. DETAILED DESCRIPTION

[0024] The stretchable device for preparing the extinction film of the utility model mainly includes a support frame 1, a material guiding assembly 2, a stretching module 3, a heating unit 4 and an adjusting assembly 5. The specific implementation manner of the utility model will be described in detail in combination with the drawings. Figure 1As shown, the support frame 1 is in a rectangular structure as a whole, and the bottom thereof is fixedly connected with the base through damping columns, and damping springs are sleeved on the damping columns, and the two ends of the damping springs are in contact with the base and the support frame 1 respectively, for absorbing the vibration generated in the operation process of the equipment. A plurality of functional modules are installed on the support frame 1, including a material guiding assembly 2, a stretching module 3, a heating unit 4 and an adjusting assembly 5, which cooperatively realize the conveying, guiding, stretching and temperature control of the film.

[0025] The material guiding assembly 2 is located at the top of the support frame 1, and includes a first guiding roller group 6 and a second guiding roller group 7, and a gap is arranged between the two groups to define the running path of the film. The first guiding roller group 6 and the second guiding roller group 7 are both rotatably connected with the support frame 1 through bearings, and a tensioning roller 8 is installed between the two groups, and the outer wall of the tensioning roller 8 is in contact with the film, for adjusting the tension of the film. The tensioning roller 8 is connected with the support frame 1 through a bracket, and an adjusting screw is arranged on the bracket, and the height of the tensioning roller 8 can be adjusted by manual or automatic mode to change the tension. In addition, limit plates are installed on both sides of the first guiding roller group 6 and the second guiding roller group 7, and the limit plates are fixed on the support frame 1, for preventing the film from deviating in the running process. In order to ensure the surface of the first guiding roller group 6 and the second guiding roller group 7 to be clean, a cleaning brush is also arranged on the support frame 1, and the bristles of the cleaning brush are in contact with the outer wall of the guiding roller group, which can remove the surface impurities. At the same time, a lubricating device includes an oil storage tank and an oil delivery pipe, one end of the oil delivery pipe is connected with the oil storage tank, and the other end extends to the bearing of the guiding roller group, for lubricating the rotating parts.

[0026] The stretching module 3 is slidingly installed on the support frame 1, and mainly includes a stretching frame 9, a driving motor 10, a transmission gear 11, a rack 12 and a stretching roller group 13. Figure 2As shown, the stretching frame 9 is connected to the support frame 1 via a slide rail that extends horizontally, allowing the stretching frame 9 to move horizontally on the support frame 1. A drive motor 10 is fixedly mounted on the stretching frame 9, and a transmission gear 11 is fixedly connected to its output shaft. The transmission gear 11 meshes with a rack 12, which is fixedly mounted on the support frame 1 and arranged along the extension direction of the slide rail. When the drive motor 10 starts, the transmission gear 11 rolls on the rack 12, thereby driving the stretching frame 9 to move along the slide rail. The stretching roller assembly 13 includes two opposing stretching rollers, which are rotatably connected to the stretching frame 9 via bearings. The outer walls of the stretching rollers contact the film to apply a stretching force to the film. The position of the stretching roller assembly 13 can be finely adjusted using an adjusting screw. One end of the adjusting screw is connected to the stretching roller assembly 13, and the other end passes through the stretching frame 9 and is threadedly connected to it. Rotating the adjusting screw changes the spacing between the stretching roller assemblies 13, thus accommodating films of different thicknesses. In addition, a pressure sensor is installed on the stretching frame 9. The pressure sensor is in contact with the stretching roller group 13 and is used to detect the pressure applied to the film by the stretching roller group 13.

[0027] Adjustment component 5 is used to dynamically adjust the stretching speed and position of stretching module 3, such as... Figure 3 As shown, it mainly consists of a servo motor 14, a lead screw 15, a moving block 16, and a guide rod 17. The servo motor 14 is fixedly mounted on the support frame 1, and the lead screw 15 is fixedly connected to its output shaft. The lead screw 15 is arranged horizontally and threadedly connected to the moving block 16. The moving block 16 is fixedly connected to the tension frame 9. When the servo motor 14 is started, the lead screw 15 rotates, and the moving block 16 moves along the axial direction of the lead screw 15, thereby driving the tension frame 9 to move horizontally on the support frame 1. The guide rod 17 passes through the moving block 16 and is slidably connected to the moving block 16, used to limit the movement direction of the moving block 16 and ensure that the moving block 16 moves smoothly along a predetermined trajectory. In addition, a sensor module is also installed on the support frame 1. The sensor module is used to detect the position information of the tension module 3 and feeds the detection results back to the control system. The control system adjusts the speed and direction of the servo motor 14 in real time according to the feedback information, thereby realizing precise control of the position of the tension module 3.

[0028] Heating unit 4 is fixedly mounted on support frame 1 and is used for temperature control of the film to facilitate the stretching process. For example... Figure 4As shown, the heating unit 4 includes a heating box 18, an electric heating tube 19, and a temperature control module 20. The heating box 18 is internally provided with a heating cavity for accommodating the film, which is heated in the heating cavity and then enters the stretching module 3 for stretching. The electric heating tube 19 is fixedly installed on the inner wall of the heating box 18 and uniformly distributed along the circumference of the heating cavity to ensure uniform temperature distribution in the heating cavity. The temperature control module 20 includes a temperature sensor and a controller. The temperature sensor is fixedly installed on the outer wall of the heating box 18 for detecting the temperature in the heating cavity. The controller adjusts the power of the electric heating tube 19 according to the detection result of the temperature sensor, thereby realizing accurate control of the temperature in the heating cavity.

[0029] The monitoring mechanism is used to monitor the running state of the stretching module 3, as shown in the figure, which includes a camera 21, a display screen 22, and an alarm 23. The camera 21 is fixedly installed on the support frame 1, and its lens faces the working area of the stretching module 3, which is used to shoot the working state of the stretching module 3 in real time. The display screen 22 is fixedly installed on the support frame 1 and is signal connected with the camera 21, which is used to display the working state image of the stretching module 3. The alarm 23 is signal connected with the sensor module, and when the stretching module 3 exceeds the preset working range, the alarm 23 will issue an alarm to remind the operator to handle the abnormal situation in time. Figure 5

[0030] In order to facilitate maintenance and repair, a maintenance opening is formed on the support frame 1, which is located below the stretching module 3 and is used for maintenance and repair of the stretching module 3. A protective door is hinged on the maintenance opening, and the protective door is fixedly connected with the support frame 1 through a lock catch, which is used to close the maintenance opening when the equipment is running, to ensure the safe operation of the equipment.

[0031] ​The stretching device with adjustable preparation of the extinction film in actual application firstly introduces the film to be stretched from the first guide roller group 6, enters the second guide roller group 7 after adjusting the tension through the tensioning roller 8. Subsequently, the film is heated in the heating cavity of the heating unit 4, the temperature sensor detects the temperature in the heating cavity and transmits the data to the controller, the controller adjusts the power of the electric heating tube 19 according to the set temperature value, and ensures that the film reaches the required stretching temperature. The heated film enters the stretching module 3, the stretching roller group 13 applies stretching force to the film, and the pressure sensor monitors the stretching force in real time and feeds back the data to the control system. At the same time, the servo motor 14 drives the moving block 16 to move along the guide rod 17 through the lead screw 15, so as to adjust the position of the stretching frame 9, realize the dynamic control of the stretching speed and position. During the whole operation process, the camera 21 shoots the working state of the stretching module 3 in real time and displays through the display screen 22, if abnormal condition occurs, the alarm 23 will give an alarm, reminding the operator to handle in time. Through the cooperative work of the above-mentioned parts, the utility model can adjust the stretching parameters in real time according to the material characteristics of the film, avoid the uneven surface or rupture of the film in the stretching process, so as to meet the production demand under the conditions of high efficiency, intelligence and changeability.

[0032] In order to better enable the relevant personnel in the technical field to fully understand and implement the utility model, the specific implementation principle of the utility model is further supplemented in combination with a specific application scene.

[0033] When starting the equipment, first introduce the film to be stretched into the first guide roller group 6, and change the tension of the film by adjusting the height of the tensioning roller 8. At this time, the limiting plate ensures that the film does not deviate during operation, and the cleaning brush removes the impurities that may exist on the surface of the first guide roller group 6 and the second guide roller group 7, so as to ensure the smoothness of the film conveying. The lubricating device provides lubricating oil to the bearing of the guide roller group through the oil supply pipe, reduces the friction loss, and prolongs the service life of the equipment.

[0034] Subsequently, the film enters the heating cavity of the heating unit 4 for preheating treatment. The design that the electric heating tube 19 is evenly distributed along the circumference of the heating cavity makes the temperature distribution in the heating cavity more uniform, avoiding the situation of local overheating or insufficient heating. The temperature sensor detects the temperature in the heating cavity in real time, and transmits the data to the controller, and the controller dynamically adjusts the power output of the electric heating tube 19 according to the set target temperature value. This closed-loop control mode can ensure that the film is always in the best stretching temperature range, thereby effectively improving the ductility and mechanical properties of the film.

[0035] When the film enters the stretching module 3 from the heating unit 4, the stretching roller set 13 starts to apply the stretching force. The pressure sensor is in contact with the stretching roller set 13, which monitors the size of the stretching force in real time and feeds back the data to the control system. If it is detected that the stretching force exceeds the preset range, the control system will immediately adjust the speed and direction of the servo motor 14, and drive the moving block 16 to move smoothly along the guide rod 17 through the lead screw 15, so as to accurately control the position and speed of the stretching frame 9. In addition, the adjusting screw can fine-tune the distance between the stretching roller set 13 to adapt to the film of different thicknesses.

[0036] During the entire stretching process, the monitoring mechanism continuously records the working state of the stretching module 3. The camera 21 shoots the image of the working area of the stretching module 3 and displays it in real time through the display screen 22, so that the operator can intuitively understand the running condition of the equipment. Once the sensor module detects that the stretching module 3 exceeds the preset working range, the alarm 23 will issue an alarm signal to remind the operator to take timely measures. This real-time monitoring mechanism not only improves the production efficiency, but also significantly reduces the product quality problems caused by abnormal conditions.

[0037] In order to ensure the long-term stable operation of the equipment, the damping assembly arranged at the bottom of the support frame 1 absorbs the vibration generated during the operation of the equipment, reducing the influence on the stretching accuracy. At the same time, the design of the maintenance opening facilitates the maintenance and repair of the stretching module 3 by the operator, and the protective door can close the maintenance opening when the equipment is running, ensuring the operation safety.

[0038] Through the cooperative work of the above-mentioned parts, the utility model realizes the accurate adaptation to the film material characteristics. For example, for the matt film of different materials, the temperature in the heating cavity, the stretching speed and the stretching force and other parameters can be adjusted to optimize the mechanical properties and optical properties of the film. This design solves the problem that the existing stretching equipment is difficult to adjust the stretching parameters in real time according to the material characteristics, avoids the phenomenon of uneven surface or rupture of the film during the stretching process, so as to meet the production demand in efficient, intelligent and variable environment.

[0039] The contents not described in detail in the specification all belong to the prior art known by those skilled in the art, and the model parameters of each electric appliance are not specifically limited, and conventional equipment can be used. The electric appliance control elements not mentioned in the technical solution belong to the prior art, so they are not shown in the figure, and will not be described here

[0040] The above is only a preferred embodiment of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. An adjustable stretching device for preparing matte film, characterized in that, include: A support frame (1) is fixedly installed on the base; A feed guide assembly (2) is disposed on the support frame (1) for conveying and guiding the film; a stretching module (3) is slidably mounted on the support frame (1) for applying a controllable stretching force to the film; An adjustment component (5) is provided on the support frame (1), the adjustment component (5) being used to dynamically adjust the stretching speed and position of the stretching module (3); A heating unit (4) is fixedly installed on the support frame (1). The heating unit (4) is used to control the temperature of the film to cooperate with the stretching process.

2. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, The material guiding assembly (2) includes: A first guide roller group (6) and a second guide roller group (7) are fixedly installed on the top of the support frame (1), and a gap is provided between the first guide roller group (6) and the second guide roller group (7); Rotate the tension roller (8) mounted on the support frame (1), the tension roller (8) is located between the first guide roller group (6) and the second guide roller group (7), and the outer wall of the tension roller (8) is in contact with the film; A limiting plate is fixedly installed on the support frame (1), and the limiting plate is arranged on both sides of the first guide roller group (6) and the second guide roller group (7).

3. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, The stretching module (3) includes: A tension frame (9) is slidably mounted on the support frame (1), and the tension frame (9) is connected to the support frame (1) via a slide rail; A drive motor (10) is fixedly installed on the tension frame (9), and a transmission gear (11) is fixedly connected to the output shaft of the drive motor (10); A rack (12) meshes with the transmission gear (11), and the rack (12) is fixedly mounted on the support frame (1); The tension roller assembly (13) is arranged on the tension frame (9). The tension roller assembly (13) includes two tension rollers arranged opposite each other. The tension rollers are rotatably connected to the tension frame (9) through bearings.

4. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, The adjustment component (5) includes: A servo motor (14) is fixedly installed on the support frame (1), and a lead screw (15) is fixedly connected to the output shaft of the servo motor (14); A movable block (16) is threaded onto the lead screw (15), and the movable block (16) is fixedly connected to the tension frame (9); A guide rod (17) is provided on the support frame (1), the guide rod (17) passes through the movable block (16) and is slidably connected to the movable block (16).

5. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, The heating unit (4) includes: A heating box (18) is fixedly installed on the support frame (1), and a heating chamber is provided inside the heating box (18); Electric heating tubes (19) are fixedly installed on the inner wall of the heating box (18), and the electric heating tubes (19) are evenly distributed along the circumference of the heating cavity; A temperature control module (20) is installed on the heating box (18), the temperature control module (20) including a temperature sensor and a controller fixedly installed on the outer wall of the heating box (18).

6. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, Also includes: A camera (21) is fixedly installed on the support frame (1), with the lens of the camera (21) facing the working area of ​​the stretching module (3); A display screen (22) is fixedly installed on the support frame (1), and the display screen (22) is signal connected to the camera (21); An alarm (23) is mounted on the support frame (1) and is signal-connected to the adjustment component (5).

7. The adjustable stretching apparatus for preparing matte film as described in claim 3, characterized in that, The stretching module (3) also includes: A pressure sensor is fixedly installed on the tension frame (9), and the pressure sensor is in contact with the tension roller group (13); An adjusting screw is fixedly installed on the stretching frame (9). One end of the adjusting screw is connected to the stretching roller group (13), and the other end passes through the stretching frame (9) and is threadedly connected to the stretching frame (9).

8. The adjustable stretching apparatus for preparing matte film as described in claim 1, characterized in that, The bottom of the support frame (1) is provided with a shock-absorbing component, which includes: A shock-absorbing column is fixedly installed on the base, and the top end of the shock-absorbing column is fixedly connected to the support frame (1); A shock-absorbing spring is sleeved on the shock-absorbing column, and the two ends of the shock-absorbing spring are in contact with the base and the support frame (1) respectively.

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