An apparatus for manufacturing a membrane having a uniform thickness

Abstract

The utility model discloses a kind of membrane piece manufacturing equipment with uniform thickness, comprising: base, upper press roll support, lower press roll support and respectively fixed on the upper press roll support and lower press roll support upper press roll and lower press roll, lower press roll support is fixed on the upside of base, it is characterized in that, membrane piece manufacturing equipment with uniform thickness further includes: linear guide mechanism, linear guide mechanism is vertically fixed on base, and upper press roll support is arranged on linear guide mechanism;Pushing device is arranged in upper press roll support, and pushing device can push upper press roll support and move in vertical direction on linear guide mechanism;Control module, control module is configured to move to adjust the pressure between upper press roll and lower press roll by pushing device pushing upper press roll support and moving on linear guide mechanism according to the set pressure parameter.The membrane piece manufacturing equipment with uniform thickness provided by the utility model makes the thickness of calendered membrane piece more uniform by the automatic adjustment of pressure.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm manufacturing equipment technology, and in particular to a diaphragm manufacturing equipment with uniform thickness. Background Technology

[0002] In the field of membrane manufacturing, especially in high-precision applications such as medical and filtration, the uniformity of membrane thickness directly affects product performance. For example, uneven thickness in medical breathable membranes may lead to protective failure, while thickness deviations in industrial filter membranes will reduce filtration efficiency.

[0003] Current mainstream thickness control technologies include mechanical stretching and pneumatic adjustment. Mechanical stretching, which adjusts thickness by pressing or stretching the membrane with rollers, is a traditional and commonly used method. However, direct pressing with rigid rollers can easily deform the membrane, especially for microporous membranes such as expanded polytetrafluoroethylene (ePTFE), damaging its breathable and water-permeable microporous structure. Furthermore, manually adjusting the roller spacing cannot respond to thickness fluctuations in real time, requiring repeated trial and error, resulting in low production efficiency and material waste. Simultaneously, the rigid pressing of mechanical methods can collapse the microporous structure, leading to a decline in membrane performance. Pneumatic adjustment uses air pressure differences to control membrane thickness, a non-contact method. However, its accuracy is limited (typically millimeter-level), making it difficult to meet the micron-level accuracy requirements of medical-grade membranes (e.g., thickness deviation ≤ ±1%). Additionally, air pressure is easily affected by ambient temperature and airflow stability, and the membrane can wrinkle due to tension fluctuations during high-speed operation, all of which make high-precision control and uniformity difficult to guarantee.

[0004] Meanwhile, traditional testing is mostly offline sampling (such as manual sampling and measurement), which cannot provide real-time feedback to the adjustment mechanism, resulting in untimely detection of thickness fluctuations and making it difficult to adapt to the needs of continuous production.

[0005] Therefore, providing a membrane fabrication device that integrates real-time detection, dynamic adjustment, and intelligent control to achieve uniform thickness has become an urgent problem to be solved in the industry. Utility Model Content

[0006] In view of the above-mentioned shortcomings in the current field of diaphragm manufacturing equipment technology, this utility model provides a diaphragm manufacturing equipment with uniform thickness, which achieves the effect of uniform diaphragm thickness through high-precision detection equipment and dynamic adjustment.

[0007] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0008] A film fabrication device with uniform thickness includes: a base, an upper pressure roller support, a lower pressure roller support, and an upper pressure roller and a lower pressure roller respectively fixed on the upper pressure roller support and the lower pressure roller support, wherein the lower pressure roller support is fixed on the upper side of the base. The film fabrication device with uniform thickness further includes:

[0009] A linear guide mechanism, wherein the linear guide mechanism is vertically fixed on the base, and the upper pressure roller bracket is disposed on the linear guide mechanism;

[0010] The upper pressure roller support is equipped with a propulsion device, which can push the upper pressure roller support to move vertically on the linear guide rail mechanism.

[0011] A control module is configured to move the upper pressure roller bracket on the linear guide mechanism via the propulsion device according to a set pressure parameter to adjust the pressure between the upper and lower pressure rollers.

[0012] According to one aspect of the present invention, the linear guide mechanism includes a guide body and a slide rod. An upper stop and a lower stop are respectively provided at the upper and lower ends of the guide body. Both the upper and lower stops have openings. The slide rod passes through the openings and is fixed to the inner side of the guide body.

[0013] According to one aspect of the present invention, the upper pressure roller bracket includes a bracket body and a connecting column, wherein the two ends of the connecting column are respectively fixedly connected to the upper pressure roller and the bracket body.

[0014] According to one aspect of the present invention, the film fabrication equipment with uniform thickness further includes a laser thickness gauge, which is disposed above or on both sides of the film feeding path for detecting the thickness of the film and transmitting the information to the control module.

[0015] According to one aspect of the present invention, the control module and the laser thickness gauge are respectively fixed above the base by a first support rod and a second support rod.

[0016] According to one aspect of this utility model, the upper or lower pressure roller is provided with a displacement sensor for obtaining the roller spacing to the control module.

[0017] According to one aspect of the present invention, the upper or lower pressure roller is provided with a pressure sensor for obtaining the unit pressure between the pressure rollers and transmitting it to the control module.

[0018] According to one aspect of the present invention, the surfaces of the upper pressure roller and / or the lower pressure roller are covered with a flexible elastic material, wherein the flexible elastic material is a silicone or Teflon coating.

[0019] According to one aspect of this utility model, the propulsion device is a servo motor and lead screw system or an electric push rod.

[0020] According to one aspect of the present invention, the upper pressure roller and the lower pressure roller are arranged in an alternating manner to achieve an asymmetrical arrangement.

[0021] The advantages of this invention are as follows: First, through the propulsion device, the control module can control the pressure between the pressure rollers, and through sensor feedback and dynamic adjustment of the control system, the pressure value can be controlled within a small range of variation, thus ensuring uniform thickness of the formed film. Second, through the combination of laser thickness measurement and the control module, the equipment can perform adaptive adjustment, achieving micron-level precision in film thickness control, significantly superior to traditional air pressure regulation methods. Third, by applying a flexible coating material to the surface of the pressure rollers, damage to the microporous structure of the film is avoided, preserving key properties such as air permeability and tensile strength. Finally, the film manufacturing equipment designed in this invention can be fully automated with closed-loop control, reducing manual intervention, improving production efficiency, and is suitable for large-scale industrial applications. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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.

[0023] Figure 1 This is a schematic diagram of the structure of a film fabrication device with uniform thickness according to the present invention. Detailed Implementation

[0024] 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.

[0025] The first embodiment of this utility model:

[0026] like Figure 1 As shown, a film manufacturing equipment with uniform thickness is used to manufacture film 500, including a base 101, an upper pressure roller support 102, a lower pressure roller support 103, an upper pressure roller 104, a lower pressure roller 105, a linear guide mechanism 200, a control module 300, and a laser thickness gauge 400.

[0027] The upper pressure roller 104 is fixed on the upper pressure roller bracket 102, and the lower pressure roller 105 is fixed on the lower pressure roller bracket 103. The lower pressure roller bracket 103 is fixed vertically on the upper side of the base 101.

[0028] Both the upper pressure roller 104 and the lower pressure roller 105 are equipped with motors. The motors are electrically connected to the control module 300 via wires. The control module 300 can drive the upper pressure roller 104 and the lower pressure roller 105 to rotate, thereby rolling and calendering the film.

[0029] The linear guide mechanism 200 is fixed vertically on the base 101, and the upper pressure roller bracket 102 is mounted on the linear guide mechanism 200.

[0030] A propulsion device (not shown in the figure) is provided inside the upper pressure roller support 102. The propulsion device is electrically connected to the control module 300 via a wire. The control module 300 can control the propulsion device to move vertically, thereby pushing the upper pressure roller support 102 to move vertically on the linear guide mechanism 200 to adjust the pressure between the upper pressure roller 104 and the lower pressure roller 105. In this embodiment, the propulsion device can be a servo motor and lead screw system or an electric push rod. Of course, other types such as a hydraulic drive system or a linear motor direct drive system can also be selected as needed. This design does not impose any special limitations.

[0031] The upper pressure roller 104 or the lower pressure roller 105 is equipped with a pressure sensor. The pressure sensor is used to obtain the unit pressure between the pressure rollers and transmit the pressure value to the control module 300 in real time through the connecting line. The control module 300 makes flexible adjustments by comparing the pressure value with the system preset pressure value, thereby ensuring that the pressure between the pressure rollers is within a small range of variation. This results in a more uniform thickness of the calendered film 500.

[0032] In this embodiment, the control module 300 is configured to move the upper pressure roller bracket 102 on the linear guide mechanism 200 via a propulsion device according to a set pressure parameter to adjust the pressure value between the upper pressure roller 104 and the lower pressure roller 105. In this embodiment, the control module 300 is fixed above the base 101 by a first support rod 303.

[0033] In this embodiment, the upper pressure roller bracket 102 specifically includes a bracket body 102a and a connecting column 102b. The two ends of the connecting column 102b are respectively fixedly connected to the upper pressure roller 104 and the bracket body 102a. The linear guide mechanism 200 specifically includes a guide rail body 200a and a slide rod 200b. The upper and lower ends of the guide rail body 200a are respectively provided with an upper stop block 200c and a lower stop block 200d. A first through hole is provided on the upper stop block 200c near the middle position, and a countersunk hole is provided on the lower stop block 200d vertically to the first through hole on the upper stop block 200c. During assembly, the slide rod 200b can be passed through the first through hole of the upper stop block 200c and inserted into the countersunk hole on the lower stop block 200d, thereby setting the slide rod 200b parallel to the guide rail body 200a on the inner side of the guide rail body 200a and at a certain distance from the guide rail body 200a.

[0034] In this design, the slide rod 200b can be fixed or detachable. The fixed method can be welding or integral molding to the guide rail body 200a, but this method is not flexible enough. This embodiment uses a detachable method, specifically: the lower end of the slide rod 200b has an external thread, and the countersunk hole on the lower stop 200d has an internal thread that mates with the external thread. The top of the slide rod 200b also has a circular rotating head 200e. During assembly, rotating the rotating head 200e screws the slide rod 200b into the countersunk hole on the lower stop 200d, thus fixing the slide rod 200b in place.

[0035] In this embodiment, the support body 102a of the upper pressure roller support 102 has a second through hole. During assembly, the slide rod 200b passes through the second through hole to fix the upper pressure roller support 102 on the linear guide mechanism 200.

[0036] The uniform thickness film fabrication equipment 100 of this invention also includes a power module (not shown in the figure). The power module has a main switch, which can be located on the side of the base 101 for easy operation. The power module is also equipped with a power indicator light to indicate its power-on status. The power module converts the externally input AC power into the current type and voltage level required by the various modules (including the control module 300) and electrical components in this equipment 100.

[0037] To facilitate user input of control parameters, the control module 300 has a user interface 301. During use, the user can input the device's control parameters through this user interface 301. These parameters include the pressure applied by the upper pressure roller 104 to the lower pressure roller 105, and the rotational speed of the motors inside the upper and lower pressure rollers 104 and 105. Thus, when the device is operating, the control module 300 drives the upper and lower pressure rollers 104 and 105 to rotate according to the set pressure value and motor speed, causing the upper pressure roller 104 to apply a certain pressure to the lower pressure roller 105, thereby causing the diaphragm 500 to stretch under pressure. Because the control module 300 can precisely control the pressure of the rollers, the thickness of the diaphragm 500 is relatively uniform, and the forming effect is ideal.

[0038] In this embodiment, in order to control the calendering accuracy, the upper pressure roller 104 or the lower pressure roller 105 is equipped with a displacement sensor. The displacement sensor transmits the displacement value of the pressure roller to the control module 300 in real time through the connecting line. The control module 300 can adjust the angle of the upper pressure roller 104 based on this displacement value. Of course, it can also manually fine-tune the position between the pressure rollers based on this value to ensure that the thickness of the calendered film 500 is within a small variation range.

[0039] To enhance the uniformity of the film thickness during molding, in this embodiment, the surfaces of the upper pressure roller 104 and / or the lower pressure roller 105 are coated with a flexible elastic material to accommodate the calendering requirements of the ePTFE film's microporous structure and prevent damage to the film's surface structure. In this embodiment, the flexible elastic material is silicone or a Teflon coating; however, other materials can be selected according to actual needs, and this design does not impose any special limitations.

[0040] To further enhance the uniformity of film thickness during forming, in this embodiment, the upper pressure roller 104 and the lower pressure roller 105 are arranged in an alternating manner, that is, adjacent pressure rollers are staggered by a certain distance in the lateral direction to achieve an asymmetrical arrangement, thereby improving the calendering coverage density.

[0041] When the equipment is working, control parameters, including key parameters such as pressure value, are first input through the user interface 301 of the control module 300. When calendering the diaphragm 500, the control module 300 can maintain the pressure value within a small range of variation through feedback from the pressure sensor and its own adjustment, thereby ensuring that the thickness of the calendered diaphragm is relatively uniform.

[0042] The second embodiment of this utility model:

[0043] To enhance the module forming effect, this embodiment provides an adaptively adjustable film fabrication device 100 with uniform thickness, the specific solution of which is as follows:

[0044] The membrane fabrication equipment 100 of this invention is further equipped with a laser thickness gauge 400, which is positioned above or on both sides of the feed path of the membrane 500 to detect the thickness value of the membrane 500. In this embodiment, the laser thickness gauge 400 is fixed above the base 101 by a second support rod 401.

[0045] The laser thickness gauge 400 transmits the detected thickness value of the diaphragm 500 to the control module 300 in real time via a digital interface. The control module 300 automatically adjusts the pressure value of the upper pressure roller 104 by comparing the difference between the detected thickness value and the system preset thickness value, and finally ensures that the thickness of the diaphragm 500 is uniform and the thickness value meets the preset target value.

[0046] When the equipment is working, the preset value of the film 500 thickness is first set through the user interface 301 of the control module 300. After the upper pressure roller 104 and lower pressure roller 105 begin calendering the film 500, the laser thickness gauge 400 can detect the thickness of the calendered film 500 and feed the detected thickness value back to the control module 300. Based on the feedback value, the control module 300 adjusts the pressure of the upper pressure roller 104 through the propulsion device, thereby changing the thickness of the calendered film 500. In this way, through the continuous feedback from the laser thickness gauge 400 and the continuous adjustment of the control module 300, the thickness of the calendered film 500 is eventually made to reach the expected value.

[0047] According to the experimental results, the laser thickness gauge 400 in this embodiment can achieve micron-level precision detection, thereby ensuring that the thickness error of the calendered film 500 is controlled within the micron level, so as to adapt to the application scenarios where microporous membranes have high requirements for thickness consistency.

[0048] The advantages of this invention are as follows: First, through the propulsion device, the control module can control the pressure between the pressure rollers, and through sensor feedback and dynamic adjustment of the control system, the pressure value can be controlled within a small range of variation, thus ensuring uniform thickness of the formed film. Second, through the combination of laser thickness measurement and the control module, the equipment can perform adaptive adjustment, achieving micron-level precision in film thickness control, significantly superior to traditional air pressure regulation methods. Third, by applying a flexible coating material to the surface of the pressure rollers, damage to the microporous structure of the film is avoided, preserving key properties such as air permeability and tensile strength. Finally, the film manufacturing equipment designed in this invention features fully automatic closed-loop control, reducing manual intervention, improving production efficiency, and making it suitable for large-scale industrial applications. In conclusion, the film manufacturing equipment of this invention has broad industrial application value.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A film fabrication device with uniform thickness, comprising: The equipment comprises a base (101), an upper pressure roller bracket (102), a lower pressure roller bracket (103), and an upper pressure roller (104) and a lower pressure roller (105) respectively fixed on the upper pressure roller bracket (102) and the lower pressure roller bracket (103), wherein the lower pressure roller bracket (103) is fixed on the upper side of the base (101). The equipment is characterized in that the uniformly thick film fabrication apparatus (100) further includes: A linear guide mechanism (200) is vertically fixed on the base (101), and the upper pressure roller bracket (102) is disposed on the linear guide mechanism (200). The upper pressure roller bracket (102) is provided with a propulsion device, which can push the upper pressure roller bracket (102) to move vertically on the linear guide rail mechanism (200); A control module (300) is configured to push the upper pressure roller bracket (102) on the linear guide mechanism (200) via the propulsion device according to a set pressure parameter to adjust the pressure between the upper pressure roller (104) and the lower pressure roller (105).

2. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The linear guide mechanism (200) includes a guide body (200a) and a slide rod (200b). The upper and lower ends of the guide body (200a) are respectively provided with an upper stop block (200c) and a lower stop block (200d). Both the upper stop block (200c) and the lower stop block (200d) have openings. The slide rod passes through the openings and is fixed to the inner side of the guide body (200a).

3. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The upper pressure roller bracket (102) includes a bracket body (102a) and a connecting column (102b), with the upper pressure roller (104) and the bracket body (102a) fixedly connected at both ends of the connecting column (102b).

4. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The uniform thickness film manufacturing equipment (100) further includes a laser thickness gauge (400), which is set above or on both sides of the film (500) feeding path to detect the thickness of the film (500) and transmit the data to the control module (300).

5. The film fabrication equipment with uniform thickness according to claim 4, characterized in that, The control module (300) and the laser thickness gauge (400) are fixed above the base (101) by the first support rod (303) and the second support rod (401), respectively.

6. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The upper pressure roller (104) or the lower pressure roller (105) is equipped with a displacement sensor to obtain the pressure roller spacing and transmit it to the control module (300).

7. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The upper pressure roller (104) or lower pressure roller (105) is equipped with a pressure sensor to obtain the unit pressure between the pressure rollers and transmit it to the control module (300).

8. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The surfaces of the upper pressure roller (104) and / or the lower pressure roller (105) are covered with a flexible elastic material, which is silicone or Teflon coating.

9. The film fabrication equipment with uniform thickness according to claim 1, characterized in that, The propulsion device is a servo motor and lead screw system or an electric push rod.

10. The film fabrication equipment with uniform thickness according to any one of claims 1 to 9, characterized in that, The upper pressure roller (104) and the lower pressure roller (105) are arranged in an alternating manner to achieve an asymmetrical arrangement.

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