Rotary cutting equipment for ultrathin PTFE (Polytetrafluoroethylene) membrane material and manufacturing process of ultrathin PTFE membrane material

Abstract

The invention relates to the technical field of functional film production and processing, in particular to rotary cutting equipment for an ultrathin PTFE film material and a manufacturing process of the ultrathin PTFE film material. Comprising a lathe, a rear rotating shaft and a rotating part which are rotationally connected to the lathe, a blade arranged on the right side of the rear rotating shaft, a turning part arranged on the lathe, a fixing frame arranged on the right side of the lathe, a winding shaft rotationally connected to the fixing frame and a winding part arranged above the winding shaft. The lathe bed is made of marble materials, the characteristics that the marble is resistant to high temperature and not prone to deformation are ingeniously utilized, when the lathe is heated to produce a PTFE functional film, thermal deformation is avoided, the turning precision of the functional film is guaranteed, high-precision positioning and control are achieved through the linear servo module, and the machining precision of the functional film is improved. And therefore, the position of the blade is accurately controlled, and the turning precision of the coiled material is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of functional film production and processing, in particular to a rotary cutting device for ultra-thin PTFE membrane material and a manufacturing process thereof. Background Art

[0002] PTFE (polytetrafluoroethylene) film is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. When cutting and processing PTFE film, a rotary cutter is required. The PTFE fluoroplastic rotary cutter can be used for processing PTFE-type fluoroplastic films. During processing, the coil core shaft is stuck by the clamping shaft, and the rotary cutter rotary cuts along the circumferential surface of the rod to cut the rod into a film. Depending on the different uses, the thickness of the film can be any specification of 0.03-0.5mm.

[0003] In the existing technology, the rotary cutting machine for processing PTFE mainly uses an ordinary horizontal lathe as the main machine, and the horizontal lathe tool holder must be modified before processing and cutting can be carried out. Its efficiency is low, precision is poor, and quality is difficult to guarantee. In the existing technology, a small number of companies use CNC machine tools to control and ensure the processing accuracy of PTFE functional films. For example, the CNC film rotary cutting machine with patent number CN103802149B can realize the one-time clamping of plastic workpieces, accurate workpiece positioning, convenient and flexible adjustment, full-sequence processing completion, high degree of automation, greatly improving precision and production efficiency, and ensuring product quality.

[0004] In the existing technology, although CNC machine tools have realized the full process of plastic workpiece processing from clamping, positioning, processing and winding, which has improved the processing accuracy and production efficiency to a certain extent, during the production of PTFE functional film, the temperature of the machine tool will rise when it is running, and the accessories on the rotary cutting machine will undergo thermal expansion, which will cause the previously positioned coil to shift, thereby affecting the turning processing accuracy of the coil.

[0005] Therefore, a rotary cutting device for ultra-thin PTFE membrane and a manufacturing process thereof are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a rotary cutting device for ultra-thin PTFE membrane materials and a manufacturing process thereof, so as to solve the problem in the prior art that the temperature of the lathe changes when turning the coil, causing the accessories on the lathe to expand and displace slightly, thereby affecting the processing accuracy of the PTFE functional film.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The rotary cutting equipment for ultra-thin PTFE membrane materials is used to process coils, including a lathe, a rear rotating shaft and a rotating component rotatably connected to the lathe, a blade arranged on the right side of the rear rotating shaft, a turning component arranged on the lathe, a fixed frame arranged on the right side of the lathe, a winding shaft rotatably connected to the fixed frame, and a winding component arranged above the winding shaft. The rotating component is used to cooperate with the rear rotating shaft to fix the coil and drive the coil to rotate, the turning component is used to drive the blade to fit the coil, the winding shaft is driven to rotate by a motor, and the winding component is used to cooperate with the winding shaft to tighten and wind the turned coil.

[0009] Preferably, the lathe is made of marble.

[0010] Preferably, the rear rotating shaft is driven to rotate by a separate fixed motor, and the rear rotating shaft is connected to the center hole of the coil.

[0011] Preferably, the rotating component includes a rotating shaft and an inner supporting jaw, the rotating shaft is driven by a rotating motor, the rotating motor has the same rotation speed as the fixed motor, the inner supporting jaw is connected to the rotating shaft, and the inner supporting jaw is in contact with the center of the coil.

[0012] Preferably, the turning component comprises a tool holder, a movable guide rail and a linear servo module, wherein the tool holder is used to fix the blade, the movable guide rail is fixed on the lathe, and the linear servo module is used to control the tool holder to drive the blade to move.

[0013] Preferably, a cooling component is provided on the knife holder, and the cooling component is used to cool the blade. The cooling component includes a cooling compressor, a cooling channel, an air suction head, an air suction port, an air extraction pump and an air extraction channel. The cooling compressor is fixed on the knife holder, and the cooling channel is provided in the blade. The cooling channel is connected to the cooling compressor through a pipeline. The air suction head is provided at the left end of the knife holder, and the air suction port is opened at the left end of the air suction head. The air suction port corresponds to the position of the coil, and the air extraction channel is provided in the knife holder. The air extraction channel is connected to the air suction port and the cooling channel. The air extraction pump is provided at the upper end of the knife holder, and the air extraction pump is connected to the air extraction channel.

[0014] Preferably, a feedback component is further provided in the tool holder, and the feedback component includes an inner piston, an outer piston, a return spring, a first trigger block, a second trigger block and a marking block, a reset chamber is opened at the right end of the exhaust channel, the inner piston is slidably connected in the exhaust channel, the outer piston is connected to the inner piston, and the outer piston is slidably connected in the reset chamber, the two ends of the return spring are respectively connected to the right end of the outer piston and the inner wall of the tool holder, the first trigger block is arranged on the front side of the inner piston, and the second trigger block is arranged on the rear side of the outer piston, and the marking block is provided with two groups, and the two groups of marking blocks are respectively arranged at the left ends of the first trigger block and the second trigger block, a first chamfer is provided on the first trigger block, and a second chamfer is provided on the second trigger block, a marking chamfer is provided on the right end of the marking block, the first chamfer cooperates with the inner piston, the second chamfer cooperates with the outer piston, the marking chamfer cooperates with the first trigger block and the second trigger block, and the left end of the marking block cooperates with the film material.

[0015] Preferably, the winding component includes a tensioning frame, a first roller, a second roller and a third roller. The upper end of the tensioning frame is rotatably connected to the fixed frame. The first roller, the second roller and the third roller are rotatably connected to the tensioning frame from top to bottom in sequence. There are gaps between the first roller, the second roller and the third roller, and the winding shaft is driven to rotate by a motor.

[0016] Preferably, a thread groove is provided on the third roller shaft, and the front and rear ends of the thread groove have opposite rotation directions.

[0017] A process for producing an ultra-thin PTFE membrane, based on the above-mentioned ultra-thin PTFE membrane rotary cutting equipment, comprises the following steps:

[0018] By using marble to make the lathe, the lathe can bear heavy loads and is not easily deformed, thus ensuring processing accuracy;

[0019] The coil is fixed by the rear rotating shaft, rotating shaft and inner supporting jaws;

[0020] By using a static pressure spindle for the rear rotating shaft and the rotating shaft, friction is reduced when the coil is driven to rotate;

[0021] The linear servo module drives the tool holder to move and then controls the blade to turn the coil, ensuring the yield of the film at the turning point;

[0022] The cut film is wound by the winding component.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] By using marble to make the lathe bed, and cleverly utilizing the high-temperature resistance and non-deformation properties of marble, the lathe will not deform when heated during the production of PTFE functional film, thereby ensuring the turning accuracy of the functional film. By using a linear servo module, high-precision positioning and control are achieved, thereby achieving accurate control of the blade position, thereby ensuring the accuracy of coil turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0028] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0029] Figure 5 It is a schematic diagram of the overall left side structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the cooling compressor position structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the working position structure of the suction head of the present invention;

[0032] Figure 8 Schematic diagram of the cross-sectional structure of the feedback component of the present invention;

[0033] Figure 9 Schematic diagram of the cross-sectional structure of the air extraction channel of the present invention;

[0034] Figure 10 For the present invention Figure 9 The enlarged structural diagram at B in the middle;

[0035] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point C in the middle.

[0036] In the figure: 1. coil; 2. lathe; 3. rear rotating shaft; 4. rotating part; 5. blade; 6. turning part; 7. fixed frame; 8. winding shaft; 9. winding part; 41. rotating shaft; 42. inner support clamp; 61. knife seat; 62. moving guide rail; 10. cooling part; 101. cooling compressor; 102. cooling channel; 103. suction head; 104. suction port; 106. exhaust channel; 20. feedback part; 201. inner piston; 202. outer piston; 203. reset spring; 204. first trigger block; 205. second trigger block; 206. marking block; 207. reset chamber; 2041. first chamfer; 2051. second chamfer; 2061. marking chamfer; 2602. baffle; 2603. separation spring. DETAILED DESCRIPTION

[0037] To clearly and completely describe the technical solutions in the embodiments of the present invention and to make the features and advantages more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figures 1 to 5 The present invention provides a rotary cutting device for ultra-thin PTFE membrane material, which is used for processing a coil 1, including a lathe 2, a rear rotating shaft 3 and a rotating component 4 rotatably connected to the lathe 2, a blade 5 arranged on the right side of the rear rotating shaft 3, a turning component 6 arranged on the lathe 2, a fixing frame 7 arranged on the right side of the lathe 2, a winding shaft 8 rotatably connected to the fixing frame 7, and a winding component 9 arranged above the winding shaft 8. The rotating component 4 is used to cooperate with the rear rotating shaft 3 to fix the coil 1 and drive the coil 1 to rotate, the turning component 6 is used to drive the blade 5 to fit with the coil 1, the winding shaft 8 is driven to rotate by a motor, and the winding component 9 is used to cooperate with the winding shaft 8 to tighten and wind the turned coil 1.

[0040] Specifically, the lathe 2 is made of marble. The advantages of using marble for the confidential lathe 2 here mainly include high precision, good stability, not easy to deform, high temperature resistance, acid and alkali corrosion resistance and long service life.

[0041] Specifically, high precision and stability: Marble has the characteristics of maintaining the product's own precision for a long time, which is particularly suitable for high-precision manufacturing. Marble bed has the advantages of high precision, no deformation, high strength, high hardness, and good seismic performance, which is very suitable for the bed and guide rail material of precision and ultra-precision machine tools.

[0042] Not easy to deform and high temperature resistant: After long-term natural aging, marble has a uniform structure, a very small linear expansion coefficient, and completely eliminates internal stress, making it not easy to deform. At the same time, marble is resistant to high temperatures and can maintain high precision under heavy loads and general temperatures. It can maintain high precision under heavy loads and general temperatures, which affects the processing accuracy. Especially when turning functional films, the turning thickness needs to be strictly controlled.

[0043] In summary, marble as the bed material of confidential lathe 2 has significant advantages, such as high precision, good stability, and not easy to deform.

[0044] Advantages of marble lathe 2: not easy to deform and high precision. Marble has been weathered in nature for tens of thousands of years or longer, which has the same effect as aging on castings. Most of the internal stress has been released, so it is not easy to deform.

[0045] The rear shaft 3 is driven by a separate fixed motor to rotate. The rear shaft 3 is a telescopic shaft that can be driven and extended by a hydraulic cylinder to facilitate the fixing of the coil 1 between the rear shaft 3 and the rotating shaft 41. The rear shaft 3 is connected to the center hole of the coil 1. The rotating component 4 includes a rotating shaft 41 and an inner support clamp 42. The rotating shaft 41 is driven by a rotating motor. The rotating motor has the same speed as the fixed motor. The inner support clamp 42 is connected to the rotating shaft 41. The rotating motor and the fixed motor use the same motor model and are started and stopped by the same switch to control the coil 1. During turning, the rear rotating shaft 3 and the rotating shaft 41 at the front and rear ends of the coil 1 can drive the coil 1 to rotate synchronously, and the inner support jaw 42 is in contact with the center of the coil 1. The inner support jaw 42 is a pneumatic rotary chuck. After the center of one side of the coil 1 is placed outside the rotating shaft 41, the operator controls the inner support jaw 42 to open, so that the inner support jaw 42 and the center of the coil 1 are in contact and rubbed. When the rotating motor drives the rotating shaft 41 to rotate, the inner support jaw 42 and the coil 1 can be driven to rotate synchronously, thereby controlling the turning speed of the coil 1.

[0046] Specifically, the rear rotating shaft 3 and the rotating shaft 41 both use a hydrostatic spindle instead of a traditional mechanical spindle. The hydrostatic spindle is supported by an oil film or an air film. In the X-axis drive (i.e., the front and back directions), there is no mechanical contact and the friction is extremely small. It can significantly reduce motion vibration and thermal deformation, and achieve nanometer-level motion precision. The hydrostatic support method of a gas-liquid mixture is adopted. During rotation, an air film is automatically formed to generate a supporting force, thereby achieving the purpose of high-precision grinding. The hydrostatic spindle enters the bearing oil cavity through externally supplied pressure oil, causing the journal to float and realize liquid lubrication. When the hydrostatic spindle rotates at high speed, the gas lubrication effect can ensure high-precision grinding, and the precision can reach 0.1um level, while the precision of the mechanical spindle is only 0.5um. Therefore, the design of the hydrostatic spindle is adopted here to further ensure the processing accuracy. In the ultra-thin PTFE film peeling equipment, the use of dual hydrostatic spindle units instead of single mechanical spindle units can significantly improve the processing performance. Its core advantages include: nano-level frictionless motion is achieved through oil film / air film support, ensuring submicron thickness accuracy and full-width uniformity; the coordinated control of the symmetrical layout of the dual spindles can eliminate eccentric load deformation, and the combined hydrostatic damping effect effectively suppresses material vibration and edge burrs; the zero-contact feature eliminates mechanical heating and lubrication contamination, ensuring the thermal stability and cleanliness of the PTFE membrane; the ultra-low-speed and smooth motion without creeping effect meets the needs of continuous precision slitting, and the dual-unit dynamic pressure regulation function can adapt to tension fluctuations. This system is particularly suitable for manufacturing fields with strict requirements on thickness consistency, edge quality and pollution-free.

[0047] The turning component 6 includes a tool holder 61, a movable guide rail 62, and a linear servo module. The tool holder 61 is used to fix the blade 5. The movable guide rail 62 is fixed to the lathe 2. The linear servo module is used to control the tool holder 61 to drive the blade 5 to move. The tool holder 61 is driven by a linear guide rail. The linear guide rail is composed of a slider, a slide rail, a guide rail, and other components. The slider moves linearly on the guide rail via the wheel at the bottom of the slider. The guide rail is usually made of steel or aluminum alloy, with a high surface hardness, good wear resistance and guiding performance. The linear servo module includes a linear servo motor. The linear servo motor adopts a direct drive method to reduce mechanical errors. In combination with a high-precision grating scale, it can achieve high-precision positioning and control, thereby achieving accurate control of the position of the blade 5, thereby ensuring the accuracy of the turning of the coil 1.

[0048] Specifically, in the Y-axis drive (i.e. left and right direction) of the ultra-thin PTFE membrane rotary cutting equipment, the use of linear servo motor direct drive instead of the traditional screw-type servo motor has significant advantages: direct drive eliminates the reverse clearance and elastic deformation of the screw drive, achieves nanometer-level positioning accuracy and higher repeatability, and ensures the extremely thin uniformity of the membrane slitting; the structure without mechanical contact avoids friction, wear and lubrication pollution, and meets the strict cleanliness requirements of PTFE processing; the dynamic response speed is faster, with acceleration increased by more than 50%, which can instantaneously compensate for material tension fluctuations and reduce membrane tensile deformation; high-rigidity direct drive can suppress cutting vibration and ensure burr-free edge cutting quality; at the same time, it simplifies the mechanical structure and reduces maintenance costs, and is especially suitable for high-frequency reciprocating motion precision rotary cutting processes, significantly improving the production efficiency and yield of ultra-thin PTFE membranes, and can rotary cut films with a thickness of 0.005 to 0.05 mm and a width of 100 to 1300 mm, meeting the production requirements of ultra-thin films with a thickness of less than 0.01 mm.

[0049] The present invention is equipped with a dedicated high-precision AC servo program control system (control accuracy of 0.1um, capable of turning thickness below 0.01mm), with spindle speed and thin thickness adjustment of 1%-10%, and thin film online thickness measurement system thickness deviation information collection and automatic adjustment function.

[0050] In ultra-thin PTFE membrane rotary cutting equipment, automatic tension control utilizes a servo drive system linked to a high-precision tension sensor. This system monitors and dynamically adjusts the torque and speed of the unwinding, pulling, and rewinding motors in real time, ensuring constant tension during the cutting process and preventing stretching, deformation, and wrinkling. Online thickness measurement utilizes a non-contact laser or beta-ray thickness gauge, which scans multiple points along the membrane's width and provides real-time feedback to the control system. This automatically adjusts the blade-roll gap and rotary cutting parameters to ensure submicron thickness uniformity. These two functions work together to significantly improve the cutting accuracy and yield of ultra-thin PTFE membranes.

[0051] A process for producing ultra-thin PTFE membranes, based on a rotary cutting device for ultra-thin PTFE membranes, comprises the following steps:

[0052] By using marble to make the lathe 2, the lathe 2 can bear heavy loads and is not easily deformed, thereby ensuring processing accuracy;

[0053] The coil 1 is fixed by the rear shaft 3, the rotating shaft 41 and the inner support jaws 42;

[0054] By using a static pressure spindle for the rear rotating shaft 3 and the rotating shaft 41, friction is reduced when the coil 1 is driven to rotate;

[0055] The linear servo module drives the blade holder 61 to move and then controls the blade 5 to turn the coil 1, ensuring the yield rate of the film at the turning position;

[0056] The cut film is wound up by the winding component 9 .

[0057] Specifically, the winding component 9 may include several rollers and a tensioning frame. Three rollers are listed in this embodiment, specifically, including a tensioning frame, a first roller, a second roller and a third roller. The upper end of the tensioning frame is rotatably connected to the fixed frame 7, and the first roller, the second roller and the third roller are rotatably connected to the tensioning frame from top to bottom. There are gaps between the first roller, the second roller and the third roller. The winding shaft 8 is driven to rotate by a motor. Through the design of multiple rollers, the turned film will not be wrinkled when it is wound on the winding shaft 8.

[0058] Working principle: When the PTFE coil 1 needs to be processed and produced, the operator only needs to put the center of the coil 1 on the rotating shaft 41, and then control the inner support jaws 42 to open so that the inner support jaws 42 fix the center hole of the coil 1, and then control the rear shaft 3 to extend so that the rear shaft 3 extends into the center of the coil 1, and turn on the fixing motor and the rotating motor so that the rear shaft 3 and the rotating shaft 41 at both ends of the coil 1 can drive the coil 1 to rotate synchronously, and then control the linear servo module to make the tool holder 61 drive the blade 5 to fit the rotating coil 1 to achieve turning. The thickness of the functional film turned out is 2000mm. The accuracy is controlled by a linear servo motor in conjunction with a high-precision grating ruler to control the position of the blade 5 from the coil 1, and the turning speed is controlled by the rotation speed of the fixed motor and the rotating motor. In order to maintain a uniform cutting speed of the coil 1, the fixed motor and the rotating motor will gradually increase the rotation speed as the radius of the coil 1 becomes smaller. The thickness of the film that can be rotary cut can reach the ultra-thin requirement of 0.005-0.05mm, and the width is 100-1300mm, which meets the production requirements of ultra-thin films with a thickness of less than 0.01mm, significantly improving the production efficiency and yield of ultra-thin PTFE membranes.

[0059] After the coil 1 is turned into a functional film, the operator pulls the functional film from the upper right side of the coil 1 to the fixed frame 7, passes it over the winding component 9, and finally winds it onto the winding shaft 8 from the upper right side of the winding shaft 8, thereby winding the turned functional film. The setting of the winding component can keep the functional film taut during winding, further ensuring the production and processing quality of the functional film.

[0060] The bed of lathe 2 is made of marble, which cleverly utilizes the characteristics of marble that is resistant to high temperatures and not easy to deform. When lathe 2 is heated during the production of PTFE functional film, it will not be deformed by heat, further ensuring the turning accuracy of the functional film and ensuring the processing quality of the functional film.

[0061] Example 2

[0062] See also Figures 6 to 11The present invention provides a rotary cutting device for ultra-thin PTFE membrane materials, including a knife seat 61, a cooling component 10 is provided on the knife seat 61, and the cooling component 10 is used to cool the blade 5. The cooling component 10 includes a cooling compressor 101, a cooling channel 102, an air suction head 103, an air suction port 104, an air pump and an air suction channel 106. The air suction pump is not drawn in the figure. The cooling compressor 101 is fixed on the knife seat 61, and the cooling channel 102 is provided in the blade 5. The cooling channel 102 is connected to the blade 5. The cooling compressor 101 is connected through a pipeline, which is not drawn in the pipeline diagram. The suction head 103 is arranged at the left end of the knife seat 61, and the suction port 104 is opened at the left end of the suction head 103. The cooling channel 102 is connected to the exhaust channel 106. The suction port 104 corresponds to the position of the coil 1. The exhaust channel 106 is arranged in the knife seat 61. The exhaust channel 106 is connected to the suction port 104 and the cooling channel 102. The exhaust pump is arranged at the upper end of the knife seat 61, and the exhaust pump is connected to the exhaust channel 106.

[0063] Specifically, the cooling compressor 101 is used to provide cold air to the blade 5 to prevent the blade 5 from continuously getting hot due to continuous cutting, which affects the accuracy of rotary cutting. During operation, the vacuum pump draws air to form a negative pressure in the vacuum channel 106. Since the vacuum channel 106 is connected to the air intake port 104 and the cooling channel 102, when the vacuum pump is working, it will cooperate with the cooling compressor 101 to flow cold air from the cooling channel 102 through the inside of the blade 5 and be sucked out by the vacuum pump, thereby achieving heat dissipation for the blade 5. On the other hand, the suction head 103 is close to the remaining film material after rotary cutting to absorb air, which can effectively adsorb the residue remaining on the film material after rotary cutting, and can also absorb and dissipate heat to a certain extent on the cutting surface of the film material after rotary cutting, thereby ensuring the accuracy of subsequent rotary cutting of the film material.

[0064] A feedback component 20 is also provided in the tool holder 61, and the feedback component 20 includes an inner piston 201, an outer piston 202, a return spring 203, a first trigger block 204, a second trigger block 205 and a marking block 206. A return chamber 207 is provided at the right end of the exhaust channel 106, the inner piston 201 is slidably connected in the exhaust channel 106, the outer piston 202 is connected to the inner piston 201, and the outer piston 202 is slidably connected in the return chamber 207, and the two ends of the return spring 203 are respectively connected to the right end of the outer piston 202 and the inner wall of the tool holder 61.

[0065] Specifically, the connection point of the suction pump to the suction passage 106 is located at the upper left side of the inner piston 201, and at the same time, the distance between the blade 5 and the film material is moderate, which can meet the needs of rotary cutting of the film material. The suction head 103 corresponds to the lower end of the film material just after rotary cutting. The suction head 103 is very close to the film material just after rotary cutting, but there is a certain gap. The purpose of this design is that the suction head 103 can absorb heat and cuttings from the film material just after rotary cutting on one hand, and on the other hand, it can ensure that the air flow area of the suction port 104 end of the suction head 103 is small enough, so that when the suction pump is pumping, the suction passage 106 can form enough negative pressure, so that the inner piston 201 in the suction passage 106 can be sucked to the left for a distance, so that the inner piston 201 drives the outer piston 202 to move and stretch the return spring 203, until the negative pressure in the suction passage 106 and the tension of the return spring 203 are balanced.

[0066] When the blade 5 is rotary cutting the film material, when the blade 5 is instantaneously or for a period of time too thin or too thick due to thermal expansion, vibration of the lathe 2, etc. When the rotary cutting is too thin, the film material just after rotary cutting has too much residual film material. When the film material just after rotary cutting rotates to the suction head 103, the distance between the suction head 103 and the film material will become closer, which further reduces the air inflow area of the suction port 104 end. The suction pump and the cooling passage 102 connected with the air compressor have the same air intake and suction amount, so the negative pressure in the suction passage will further increase, and the inner piston 201 will drive the outer piston 202 to move to the left for a distance to further stretch the return spring 203. Conversely, when the rotary cutting is too thick, the air inflow area of the suction port 104 end becomes larger, the negative pressure in the suction passage becomes smaller, and the inner piston 201 and the outer piston 202 will move to the right for a distance under the action of the return spring 203.

[0067] The first trigger block 204 is arranged at the front side of the inner piston 201, the second trigger block 205 is arranged at the rear side of the outer piston 202, and the marking block 206 is provided with two groups, and the two groups of marking blocks 206 are respectively arranged at the left ends of the first trigger block 204 and the second trigger block 205. The first trigger block 204 is provided with a first chamfer 2041, the second trigger block 205 is provided with a second chamfer 2051, and the right end of the marking block 206 is provided with a marking chamfer 2061. The first chamfer 2041 cooperates with the inner piston 201, the second chamfer 2051 cooperates with the outer piston 202, the marking chamfer 2061 cooperates with the first trigger block 204 and the second trigger block 205, and the left end of the marking block 206 cooperates with the film material. The cooperation here means that when the peeling is too thin, the inner piston 201 drives the outer piston 202 to move to the left and stretch the reset spring 203. The outer piston 202 moves to the left and pushes the second trigger block 205 backward along the second chamfer 2051. When the second trigger block 205 moves backward, it pushes the marking block 206 at the corresponding position to the left along the marking chamfer 2061 at the corresponding position. The marking block 206 at the corresponding position in the figure is the marking block 206 at the rear side. A baffle 2602 and a separation spring 2603 are set on the side of the marking block 206. The baffle 2602 is fixedly connected to the marking block 206. The separation spring 2603 is set at the left end of the baffle 2602. When the marking block 206 moves to the left, it will drive the baffle 2602 Move leftward to squeeze the separation spring 2603 until the left end of the marking block 206 is in contact with the film material; similarly, when the peeling is too thick, the inner piston 201 drives the outer piston 202 to move rightward to squeeze the return spring 203, and the inner piston 201 moves rightward along the first chamfer 2041 to push the first trigger block 204 forward, and the first trigger block 204 moves forward along the marking chamfer 2061 of the front marking block 206 to push the marking block 206 to the left, thereby making the front marking block 206 fit with the film material.

[0068] Specifically, the left end of the marking block 206 is provided with paint, and the paint can be anything like chalk. It is only necessary to make the left end of the marking block 206 fit with the film material. As the film material rotates, the film material and the marking block 206 can mark the film material through friction. The two marking blocks 206 use paints of different colors respectively, so that the staff can distinguish the reasons for the abnormal rotary cutting of the film material, so that the staff can quickly identify whether the film material here is rotary cut too thin or too thick.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A rotary cutting device for ultra-thin PTFE membrane material, used for processing coiled material (1), characterized in that: The invention comprises a lathe (2), a rear rotating shaft (3) and a rotating component (4) rotatably connected to the lathe (2), a blade (5) arranged on the right side of the rear rotating shaft (3), a turning component (6) arranged on the lathe (2), a fixing frame (7) arranged on the right side of the lathe (2), a winding shaft (8) rotatably connected to the fixing frame (7), and a winding component (9) arranged above the winding shaft (8), wherein the rotating component (4) is used to cooperate with the rear rotating shaft (3) to fix the coil (1) and drive the coil (1) to rotate, the turning component (6) is used to drive the blade (5) to fit the coil (1), the winding shaft (8) is driven to rotate by a motor, and the winding component (9) is used to cooperate with the winding shaft (8) to wind the turned coil (1) film.

2. The rotary cutting device for ultra-thin PTFE membrane according to claim 1, characterized in that: The lathe (2) is made of marble.

3. The rotary cutting device for ultra-thin PTFE membrane according to claim 1, characterized in that: The rear rotating shaft (3) is driven to rotate by a separate fixed motor, and the rear rotating shaft (3) is connected to the center hole of the coil (1).

4. The rotary cutting device for ultra-thin PTFE membrane according to claim 3, characterized in that: The rotating component (4) includes a rotating shaft (41) and an inner supporting clamp (42). The rotating shaft (41) is driven by a rotating motor. The rotating motor has the same rotation speed as the fixed motor. The inner supporting clamp (42) is connected to the rotating shaft (41). The inner supporting clamp (42) is in contact with the center of the coil (1).

5. The rotary cutting device for ultra-thin PTFE membrane according to claim 4, characterized in that: The turning component (6) comprises a tool holder (61), a movable guide rail (62) and a linear servo module. The tool holder (61) is used to fix the blade (5). The movable guide rail (62) is fixed on the lathe (2). The linear servo module is used to control the tool holder (61) to drive the blade (5) to move.

6. The rotary cutting device for ultra-thin PTFE membrane according to claim 4, characterized in that: The blade seat (61) is provided with a cooling component (10), and the cooling component (10) is used to cool the blade (5). The cooling component (10) includes a cooling compressor (101), a cooling channel (102), an air suction head (103), an air suction port (104), an air pump and an air suction channel (106). The cooling compressor (101) is fixed on the blade seat (61), and the cooling channel (102) is provided in the blade (5). The cooling channel (102) is connected to the cooling compressor (101). The machine (101) is connected through a pipeline, the suction head (103) is arranged at the left end of the knife seat (61), the suction port (104) is opened at the left end of the suction head (103), the suction port (104) corresponds to the position of the coil (1), the exhaust channel (106) is arranged in the knife seat (61), the exhaust channel (106) is connected with the suction port (104) and the cooling channel (102), the exhaust pump is arranged at the upper end of the knife seat (61), and the exhaust pump is connected to the exhaust channel (106).

7. The rotary cutting device for ultra-thin PTFE membrane according to claim 6, characterized in that: A feedback component (20) is also provided in the knife seat (61), and the feedback component (20) is used to monitor the peeling state of the coil (1) and mark it when the peeling is abnormal. The feedback component (20) includes an inner piston (201), an outer piston (202), a reset spring (203), a first trigger block (204), a second trigger block (205) and a marking block (206). A reset chamber (207) is provided at the right end of the air extraction channel (106). The inner piston (201) is slidably connected in the air extraction channel (106), and the outer piston (202) is connected to the inner piston (201). The outer piston (202) is slidably connected in the reset chamber (207). The two ends of the reset spring (203) are respectively connected to the right end of the outer piston (202) and the inner wall of the knife seat (61). The first trigger block (204) is provided. The marking block (206) is arranged on the front side of the inner piston (201), the second trigger block (205) is arranged on the rear side of the outer piston (202), and two groups of marking blocks (206) are arranged on the left ends of the first trigger block (204) and the second trigger block (205), respectively. The first trigger block (204) is provided with a first chamfer (2041), and the second trigger block (2051) is provided with a second chamfer (2051). The right end of the marking block (206) is provided with a marking chamfer (2061), the first chamfer (2041) cooperates with the inner piston (201), the second chamfer (2051) cooperates with the outer piston (202), the marking chamfer (2061) cooperates with the first trigger block (204) and the second trigger block (205), and the left end of the marking block (206) cooperates with the film material.

8. A process for producing an ultra-thin PTFE membrane, characterized in that: The rotary cutting device of the ultra-thin PTFE membrane material according to any one of claims 1 to 7 comprises the following steps: By using marble to make the lathe (2), the lathe (2) can bear heavy loads and is not easily deformed, thereby ensuring processing accuracy; The coil (1) is fixed by the rear rotating shaft (3), the rotating shaft (41) and the inner supporting clamp (42); By adopting a static pressure main shaft for the rear rotating shaft (3) and the rotating shaft (41), friction is reduced when the coiled material (1) is driven to rotate; The linear servo module drives the blade holder (61) to move and then controls the blade (5) to turn the coil (1), thereby ensuring the yield rate of the film at the turning location; The cut film is wound up by a winding component (9).

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