A film pulling mechanism

Abstract

The application discloses a film pulling mechanism and relates to the technical field of automation equipment. The film pulling mechanism comprises a mechanism rack, a deviation rectifying mechanism, an upper movable seat, an upper clamping device, a lower movable seat, a lower clamping device and a cutting mechanism. The deviation rectifying mechanism is arranged on the mechanism rack and is provided with a flat guide hole. The flat guide hole is used for guiding the film body to pass through in the up-down direction, so that the film body is guided. The upper movable seat is movably arranged on the mechanism rack in the up-down direction and is located below the deviation rectifying mechanism. The upper movable seat is provided with the upper clamping device, and the upper clamping device is used for clamping the film body. The lower movable seat is movably arranged on the mechanism rack in the up-down direction and is located below the upper movable seat. The lower movable seat is provided with the lower clamping device, and the lower clamping device is used for clamping the film body. The cutting mechanism is arranged on the mechanism rack and is used for cutting the film body, so that the film body is divided. The application can avoid or reduce the distortion of the film body caused by film pulling and cutting.

Description

Technical Field

[0001] This application relates to the field of automated equipment technology, and more specifically to a film stretching mechanism. Background Technology

[0002] In the field of automated production, film stretching mechanisms are widely used for pulling, positioning, and cutting diaphragm materials. Traditional film stretching mechanisms suffer from diaphragm distortion. For example, existing film stretching mechanisms use guide wheels for correction, which easily leads to diaphragm distortion. Furthermore, during film stretching and cutting, the diaphragm is prone to deformation due to stress concentration or cutting force. Therefore, a film stretching mechanism that can avoid or reduce diaphragm distortion is needed. Utility Model Content

[0003] In view of this, in order to solve the above-mentioned technical problems, this application provides a film stretching mechanism, which includes: Mechanism frame; The correction mechanism is set on the mechanism frame and is provided with a flat guide hole. The flat guide hole is used for the membrane body to pass through in the vertical direction to guide the membrane body. The upper movable seat is movably mounted on the mechanism frame in the vertical direction and located below the correction mechanism; the upper movable seat is equipped with an upper clamping device, which is used to clamp the diaphragm body. The lower movable seat is movably mounted on the mechanism frame in the vertical direction and located below the upper movable seat. The lower movable seat is equipped with a lower clamping device, which is used to clamp the diaphragm body. And a cutting mechanism, set on the mechanism frame, for cutting the diaphragm body to separate the diaphragm body.

[0004] Optionally, there exists at least one predetermined imaginary plane such that the flat guide hole, the gap formed when the upper clamping device clamps the diaphragm body, and the gap formed when the lower clamping device clamps the diaphragm body intersect with the predetermined imaginary plane.

[0005] Optionally, the cutting mechanism is located within the correction mechanism, and the cutting mechanism includes a left and right drive unit and a diaphragm cutting unit; The left and right drive units are located in the correction mechanism and are used to drive the diaphragm cutting unit to move in the left and right direction; the diaphragm cutting unit is located in the left and right drive units and is used to cut the diaphragm body when moving in the left and right direction.

[0006] Optionally, the left and right drive units are traveling shafts used to drive the diaphragm cutting unit to move in the left and right direction.

[0007] Optionally, the diaphragm cutting section includes: The front and rear drive units are located on the left and right drive units and are used to move in the left and right directions under the drive of the left and right drive units; And left and right cutting sections are provided on the front and rear drive sections for cutting the diaphragm body when the front and rear drive sections move in the left and right directions; The front and rear drive units are also used to drive the left and right cutting units to extend and retract in the front and rear direction, so as to enter or exit the transmission path of the diaphragm body.

[0008] Optionally, the membrane stretching mechanism includes: The first up-down drive unit is mounted on the mechanism frame and connected to the upper movable seat to drive the upper movable seat to move in the up-down direction; And a second up-down drive unit, which is mounted on the mechanism frame and connected to the lower movable seat, so as to drive the lower movable seat to move in the up-down direction.

[0009] Optionally, the first up-and-down driving unit is a cylinder mechanism or a lead screw mechanism; the second up-and-down driving unit is a pulley mechanism or a sprocket mechanism.

[0010] Optionally, the upper movable seat and the lower movable seat form a sliding pair with the mechanism frame respectively, so as to be movably disposed on the mechanism frame in the vertical direction; the upper clamping device includes a clamping drive device, an upper clamping plate assembly and a pull-down guide assembly; The clamping drive device is respectively set on the left and right sides of the upper movable seat and is arranged opposite to each other in the left and right direction. It is used to drive the upper clamping plate assembly to clamp or release the diaphragm body. The upper clamping plate assembly extends in the left-right direction and includes an upper front clamping plate and an upper rear clamping plate arranged opposite each other in the front-back direction; the upper front clamping plate and the upper rear clamping plate are respectively connected to a clamping drive device arranged opposite each other in the left-right direction; the clamping drive device is used to drive the upper front clamping plate and the upper rear clamping plate to clamp or release the diaphragm body. The pull-down guide assembly includes a front stop and a rear stop arranged opposite to each other in the front-rear direction; the front stop is disposed on the upper front clamp and extends downward beyond the upper front clamp, and the rear stop is disposed on the upper rear clamp and extends downward beyond the upper rear clamp. The rear side of the front baffle is flush with the rear side of the upper front plate, and the front side of the rear baffle is flush with the front side of the upper rear plate.

[0011] Optionally, the film stretching mechanism includes a guide rail, which is mounted on the mechanism frame; the upper movable seat and the lower movable seat form a sliding pair with the guide rail through corresponding sliders.

[0012] Optionally, the correction mechanism includes a front baffle and a rear baffle, with a flat guide hole formed between the front baffle and the rear baffle; The front baffle and the rear baffle are set separately, and the front baffle and the rear baffle are detachably set on the mechanism frame; one of the front baffle and the rear baffle forms a concave platform and the other forms a convex platform; the concave platform and the convex platform are in a concave-convex fit, and a flat guide hole is formed between the concave platform and the convex platform.

[0013] Beneficial effects: Unlike existing technologies, in this application, the flat guide hole can prevent the diaphragm body from twisting due to rolling with the diaphragm body during guidance; the upper and lower clamping devices work together to keep the diaphragm body taut between them, making it less prone to twisting during the cutting process. In summary, the membrane pulling mechanism of this application can avoid or reduce the twisting of the diaphragm body caused by membrane pulling and cutting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the membrane stretching mechanism of this application. Figure 1 Obtained from an oblique view from the front of the membrane stretching mechanism; Figure 2 This is a schematic diagram of the membrane stretching mechanism of this application. Figure 2 Obtained from an oblique view from the rear of the membrane stretching mechanism; Figure 3 This is a schematic diagram of the first assembly structure of the membrane stretching mechanism of this application. The first assembly structure is a schematic diagram of the assembly of the correction mechanism and the cutting mechanism. Figure 3 The self-assembled structure is obtained from a front oblique view. Figure 4 This is a schematic diagram of the first assembly structure of the membrane stretching mechanism of this application. The first assembly structure is a schematic diagram of the assembly of the correction mechanism and the cutting mechanism. Figure 4 The self-assembled structure is obtained from a rear oblique view. Figure 5 This is a schematic diagram of the first assembly structure of the membrane stretching mechanism of this application. The first assembly structure is a schematic diagram of the assembly of the correction mechanism and the cutting mechanism. Figure 5 The self-assembly structure is viewed from below. Figure 6 yes Figure 5 Enlarged view of region A in the middle. Figure 6 This includes a portion of the flat guide hole shown in magnification; Figure 7 This is a schematic diagram of the upper clamping device of the film stretching mechanism of this application. Figure 7 Viewed obliquely from the front of the upper clamping device; Figure 8 This is a schematic diagram of the upper clamping device of the film stretching mechanism of this application. Figure 8 Viewed obliquely from the rear of the upper clamping device; Figure 9 This is a schematic diagram of the membrane stretching mechanism of this application. Figure 9 Obtained from an oblique view from below the membrane stretching mechanism; Figure 10 yes Figure 9 Enlarged diagram of region B in the middle. Figure 10 This includes the slider connected to the lower movable seat, which is shown in enlarged view; Figure 11 yes Figure 10 Enlarged diagram of region C in the middle. Figure 11 This includes a slider connected to the upper movable seat, shown in enlarged view.

[0015] Explanation of reference numerals in the attached figures: 100: Film stretching mechanism; 110: Mechanism frame; 120: Correction mechanism; 121: Flat guide hole; 122: Front baffle; 123: Rear baffle; 124: Recessed platform; 125: Boss; 130: Upper movable seat; 140: Upper clamping device; 141: Clamping drive device; 142: Upper clamping plate assembly; 142a: Upper front clamping plate; 142b: Upper rear clamping plate; 143: Pull-down guide assembly; 143a: Front stop bar; 143b: Rear stop bar; 1 50: Lower movable seat; 160: Lower clamping device; 170: Cutting mechanism; 171: Left and right drive unit; 172: Diaphragm cutting unit; 173: Front and rear drive unit; 174: Left and right cutting unit; 181: First up and down drive unit; 182: Second up and down drive unit; 1821: Up and down drive motor; 1822: Transmission rod; 1823: Left pulley mechanism; 1824: Right pulley mechanism; 190: Guide rail; 191: Slider; 200: Diaphragm body. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Please see Figures 1-6 The film stretching mechanism 100 of this application includes a mechanism frame 110, a correction mechanism 120, an upper movable seat 130, an upper clamping device 140, a lower movable seat 150, a lower clamping device 160, and a cutting mechanism.

[0018] A correction mechanism 120 is mounted on the frame 110 and has a flat guide hole 121 for the diaphragm body 200 to pass through in the vertical direction to guide it. An upper movable seat 130 is movably mounted on the frame 110 in the vertical direction and located below the correction mechanism 120. The upper movable seat 130 has an upper clamping device 140 for clamping the diaphragm body 200. A lower movable seat 150 is movably mounted on the frame 110 in the vertical direction and located below the upper movable seat 130. The lower movable seat 150 has a lower clamping device 160 for clamping the diaphragm body 200. A cutting mechanism 170 is mounted on the frame 110 and is used to cut the diaphragm body 200 to separate it.

[0019] In this way, when the diaphragm body 200 passes through the flat guide hole 121 for film pulling, the flat guide hole 121 can prevent the diaphragm body 200 from twisting due to rolling with the diaphragm body 200 during the guiding process. The upper clamping device 140 can clamp the upper end of the diaphragm body 200 to be cut, and the lower clamping device 160 can clamp the lower end of the diaphragm body 200 to be cut. This allows the diaphragm body 200 between the upper clamping device 140 and the lower clamping device 160 to remain taut, so that the diaphragm body 200 between the upper clamping device 140 and the lower clamping device 160 is less likely to twist during the cutting process. In summary, the film pulling mechanism 100 of this application can avoid or reduce the twisting of the diaphragm body 200 caused by film pulling and cutting.

[0020] Optionally, such as Figure 1 and Figure 6 As shown, there exists at least one predetermined imaginary plane such that the gaps formed when the flat guide hole 121, the upper clamping device 140, and the lower clamping device 160 clamp the diaphragm body 200 intersect with the predetermined imaginary plane. This design can reduce the additional torsional moment borne by the diaphragm body 200 on its transmission path, and reduce the structural distortion caused by the non-coplanarity of the transmission path of the diaphragm body 200 from a spatial geometric perspective.

[0021] Optionally, combined Figures 1-2 See Figure 3 , Figure 4 and Figure 5 As shown, the cutting position of the cutting mechanism 170 can be configured to be located between the cutting correction mechanism 120 and the upper clamping device 140, for cutting the diaphragm body 200 between the cutting correction mechanism 120 and the upper clamping device 140.

[0022] In this way, since the diaphragm body 200 between the upper clamping device 140 and the lower clamping device 160 is kept taut, the disturbance to the diaphragm body 200 when cutting the diaphragm body 200 is less likely to cause wrinkles and twists in the diaphragm body 200 between the upper clamping device 140 and the lower clamping device 160.

[0023] Optionally, combined Figures 1-2 See Figure 3 , Figure 4 and Figure 5 As shown, the cutting mechanism 170 can be disposed on the correction mechanism 120. The cutting mechanism 170 may include a left and right driving unit 171 and a diaphragm cutting unit 172. The left and right driving unit 171 can be disposed on the correction mechanism 120 and is used to drive the diaphragm cutting unit 172 to move in the left and right direction. The diaphragm cutting unit 172 can be disposed on the left and right driving unit 171 and is used to cut the diaphragm body 200 when moving in the left and right direction. In this way, the diaphragm body 200 can enter the transmission path of the diaphragm body 200 in the left and right direction when cutting the diaphragm body 200 is required, and exit the transmission path of the diaphragm body 200 in the left and right direction when cutting the diaphragm body 200 is not required.

[0024] Optionally, combined Figures 1-2 See Figure 3 , Figure 4 and Figure 5 As shown, the left and right drive unit 171 can be a traveling shaft for driving the diaphragm cutting unit 172 to move in the left and right direction, but is not limited to this. The traveling shaft has high rigidity and reliability, ensuring the smooth movement of the diaphragm cutting unit 172 in the left and right direction, so as to avoid the vibration of the diaphragm cutting unit 172 during the cutting process, thereby optimizing the flatness of the cut of the diaphragm body 200.

[0025] Optionally, combined Figures 1-2 See Figure 3 , Figure 4 and Figure 5As shown, the diaphragm cutting section 172 may include a front-rear driving section 173 and a left-right cutting section 174. The front-rear driving section 173 may be disposed on the left-right driving section 171 and is used to move in the left-right direction under the drive of the left-right driving section 171. The left-right cutting section 174 may be disposed on the front-rear driving section 173 and is used to cut the diaphragm body 200 when the front-rear driving section 173 moves in the left-right direction. The front-rear driving section 173 may also be used to drive the left-right cutting section 174 to extend and retract in the front-rear direction, so as to enter or exit the transmission path of the diaphragm body 200. Thus, the left-right cutting section 174 can extend only when cutting the diaphragm body 200 is required, and can retract from the transmission path of the diaphragm body 200 when cutting the diaphragm body 200 is not required. Therefore, when cutting the diaphragm body 200 is not required, the retracted state of the left-right cutting section 174 can avoid or reduce cuts to the human body caused by accidental contact with the left-right cutting section 174.

[0026] Optionally, the front and rear drive units 173 can be cylinder mechanisms, and the left and right cutting units 174 can be cutting blades, but are not limited to these.

[0027] Optionally, such as Figures 1-11 As shown, the film stretching mechanism 100 may include a first up-and-down driving unit 181 and a second up-and-down driving unit 182. The first up-and-down driving unit 181 may be disposed on the mechanism frame 110 and connected to the upper movable seat 130 to drive the upper movable seat 130 to move in the up-and-down direction. The second up-and-down driving unit 182 may be disposed on the mechanism frame 110 and connected to the lower movable seat 150 to drive the lower movable seat 150 to move in the up-and-down direction. The independent driving units realize automated up-and-down movement, improving the efficiency of the film stretching process.

[0028] Optionally, such as Figures 1-11 As shown, the upper movable seat 130 and the lower movable seat 150 can form a sliding pair with the mechanism frame 110 respectively, so as to be movably disposed on the mechanism frame 110 in the vertical direction.

[0029] In this manner, the construction of the sliding joint restricts the vertical movement of the upper movable seat 130 and the lower movable seat 150, hindering their freedom of movement in other directions within the horizontal plane. This ensures that the upper clamping device 140 on the upper movable seat 130 and the lower clamping device 160 on the lower movable seat 150 maintain a relatively strict linearity in their movement trajectories when pulling the diaphragm body 200, avoiding or reducing motion errors transmitted to the diaphragm body 200 due to wobbling or swaying of the movable seats. This effectively prevents twisting and wrinkling of the diaphragm body 200 caused by unexpected lateral displacement during the membrane pulling process.

[0030] Optionally, such as Figures 1-11As shown, the film stretching mechanism 100 may include a guide rail 190, which is disposed on the mechanism frame 110. The upper movable seat 130 and the lower movable seat 150 may form a sliding pair with the guide rail 190 through corresponding sliders 191, but are not limited thereto.

[0031] Optionally, such as Figures 1-11 As shown, the second up-down drive unit 182 may include an up-down drive motor 1821, a transmission rod 1822, a left pulley mechanism 1823, and a right pulley mechanism 1824. The up-down drive motor 1821 may be mounted on the mechanism frame 110. The transmission rod 1822 may extend in the left-right direction and be connected to the left pulley mechanism 1823 and the right pulley mechanism 1824 respectively. The left pulley mechanism 1823 may be mounted on the left side of the mechanism frame 110, and the right pulley mechanism 1824 may be mounted on the right side of the mechanism frame 110.

[0032] The mechanism frame has guide rails 190 on both sides. The upper movable seat 130 has sliding pairs formed between its left and right sides and the corresponding guide rails 190 via corresponding sliders 191. Lower movable seats 150 are located on the left and right sides of the mechanism frame 110 and also form sliding pairs between their corresponding sliders 191 and the corresponding guide rails 190. Lower clamping devices 160 are located on the left and right sides of the mechanism frame 110 and are positioned on the corresponding lower movable seats 150. A left pulley mechanism 1823 connects to the slider 191 located on the left side of the mechanism frame 110 and connected to the lower movable seat 150, while a right pulley mechanism 1824 connects to the slider 191 located on the right side of the mechanism frame 110 and connected to the lower movable seat 150.

[0033] The second up-down drive unit 182 employs a synchronous drive design consisting of an up-down drive motor 1821, a transmission rod 1822, a left pulley mechanism 1823, and a right pulley mechanism 1824. Combined with the guide rails 190 and the lower movable seat 150 on the left and right sides of the mechanism frame 110, which form a sliding pair with the guide rails 190 via the corresponding side sliders 191, the left and right synchronization and balance of the lower movable seats 150 when moving up and down are achieved. Specifically, the transmission rod 1822 extends in the left and right direction and simultaneously drives the left pulley mechanism 1823 and the right pulley mechanism 1824, ensuring that the pulley mechanisms on both sides move synchronously. This drives the lower movable seats 150 on both sides to move up and down synchronously, avoiding the tilting or swaying of the diaphragm body 200 held by the lower clamping devices 160 on both sides due to the asynchrony of the independent driving on one side during the movement of the lower movable seats 150 on both sides. This effectively prevents the diaphragm body 200 from twisting and wrinkling due to unexpected lateral displacement or torsional torque during the film stretching process.

[0034] Optionally, such as Figures 1-11As shown, the first up-and-down drive unit 181 can be a cylinder mechanism or a lead screw mechanism, but is not limited to these. The second up-and-down drive unit 182 can be a pulley mechanism or a sprocket mechanism, but is not limited to these. In specific examples, a suitable first up-and-down drive unit 181 and a suitable second up-and-down drive unit 182 can be selected according to the actual working conditions.

[0035] Optionally, such as Figures 1-11 As shown, the upper clamping device 140 may include a clamping drive device 141, an upper clamping plate assembly 142, and a pull-down guide assembly 143. The clamping drive device 141 may be respectively disposed on the left and right sides of the upper movable seat 130 and arranged opposite each other in the left-right direction, for driving the upper clamping plate assembly 142 to clamp or release the diaphragm body 200. The upper clamping plate assembly 142 may extend in the left-right direction and includes an upper front clamping plate 142a and an upper rear clamping plate 142b arranged opposite each other in the front-back direction. Both the upper front clamping plate 142a and the upper rear clamping plate 142b may be respectively connected to the clamping drive device 141 arranged opposite each other in the left-right direction. The clamping drive device 141 is used to drive the upper front clamping plate 142a and the upper rear clamping plate 142b to clamp or release the diaphragm body 200. The pull-down guide assembly 143 may include a front stop bar 143a and a rear stop bar 143b arranged opposite each other in the front-back direction. A front stop bar 143a can be disposed on the upper front clamping plate 142a and extend downward beyond the upper front clamping plate 142a, and a rear stop bar 143b can be disposed on the upper rear clamping plate 142b and extend downward beyond the upper rear clamping plate 142b. The rear side of the front stop bar 143a can be flush with the rear side of the upper front clamping plate 142a, and the front side of the rear stop bar 143b can be flush with the front side of the upper rear clamping plate 142b. The symmetrical layout of the clamping drive device 141 and the design of the pull-down guide assembly 143 ensure that the clamping force of the upper clamping device 140 is applied relatively evenly to the diaphragm body 200, avoiding clamping distortion and providing stable surface contact clamping.

[0036] Optionally, such as Figures 1-11 As shown, the film stretching mechanism 100 may include a guide rail 190, and the upper movable seat 130 and the lower movable seat 150 may form sliding pairs with the guide rail 190 through corresponding sliders 191. The guide rail 190 and the sliders 191 provide high-precision linear guidance and reduce motion deviation.

[0037] Optionally, such as Figures 1-11 As shown, the left and right sides of both the upper movable seat 130 and the lower movable seat 150 can form sliding pairs with the guide rail 190 through the corresponding sliders 191.

[0038] Optionally, such as Figures 1-11As shown, the correction mechanism 120 may include a front baffle 122 and a rear baffle 123, with a flat guide hole 121 formed between the front baffle 122 and the rear baffle 123. The front baffle 122 and the rear baffle 123 can be separately installed, and each can be detachably mounted on the mechanism frame 110. One of the front baffle 122 and the rear baffle 123 can form a recess 124, and the other can form a boss 125. The recess 124 and the boss 125 are in a concave-convex fit, with the flat guide hole 121 formed between them. This separate, detachable design facilitates maintenance and cleaning, ensuring stability during long-term operation.

[0039] Optionally, such as Figures 1-11 As shown, when the membrane pulling mechanism 100 is in use, the membrane body 200 can enter the upper clamping device 140 from top to bottom through the flat guide hole 121. The upper clamping device 140 can move to the membrane picking position based on the upward movement of the upper movable seat 130, so that the upper clamping device 140 can clamp the membrane body 200 after passing through the flat guide hole 121, and can pull the membrane body 200 down to the junction position based on the downward movement of the upper movable seat 130, and then release the membrane body 200. Afterwards, the upper clamping device 140 can be reset to its initial position, while the lower clamping device 160 can move to the junction position based on the upward movement of the lower movable seat 150, so that the lower clamping device 160 can clamp the diaphragm body 200. Furthermore, based on the downward movement of the lower movable seat 150, the diaphragm body 200 can continue to move downwards, allowing subsequent diaphragm bodies 200 to sequentially pass through the flat guide hole 121 and the upper clamping device 140 until the diaphragm body 200 is pulled down to the required length after being cut by the cutting mechanism 170. Afterwards, the upper clamping device 140 and the lower clamping device 160 can clamp the diaphragm body 200, keeping the diaphragm body 200 taut between the upper clamping device 140 and the lower clamping device 160. At this time, the cutting mechanism 170 can cut the diaphragm body 200.

[0040] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A membrane stretching mechanism, characterized in that, The membrane stretching mechanism includes: Mechanism frame; A correction mechanism is provided on the frame of the mechanism and is provided with a flat guide hole. The flat guide hole is used for the membrane body to pass through in the vertical direction to guide the membrane body. The upper movable seat is movably disposed on the frame of the mechanism in the vertical direction and located below the correction mechanism; the upper movable seat is provided with an upper clamping device, which is used to clamp the diaphragm body; The lower movable seat is movably disposed on the frame of the mechanism in the vertical direction and located below the upper movable seat. The lower movable seat is provided with a lower clamping device, which is used to clamp the diaphragm body. And a cutting mechanism, disposed on the mechanism frame, for cutting the diaphragm body to separate the diaphragm body.

2. The film stretching mechanism according to claim 1, characterized in that, There exists at least one predetermined imaginary plane such that the flat guide hole, the gap formed when the upper clamping device clamps the diaphragm body, and the gap formed when the lower clamping device clamps the diaphragm body intersect with the predetermined imaginary plane.

3. The film stretching mechanism according to claim 1, characterized in that, The cutting mechanism is disposed on the correction mechanism, and the cutting mechanism includes a left and right driving part and a diaphragm cutting part; The left and right drive units are disposed on the correction mechanism and are used to drive the diaphragm cutting unit to move in the left and right direction; A diaphragm cutting section is provided on the left and right drive sections and is used to cut the diaphragm body when moving in the left and right direction.

4. The film stretching mechanism according to claim 3, characterized in that, The left and right drive units are traveling shafts used to drive the diaphragm cutting unit to move in the left and right direction.

5. The film stretching mechanism according to claim 3, characterized in that, The diaphragm cutting section includes: A front and rear drive unit is disposed on the left and right drive units and is used to move in the left and right direction under the drive of the left and right drive units; And left and right cutting sections are provided on the front and rear driving sections for cutting the diaphragm body when the front and rear driving sections move in the left and right directions; The front and rear driving parts are also used to drive the left and right cutting parts to extend and retract in the front and rear direction, so as to enter or exit the transmission path of the diaphragm body.

6. The film stretching mechanism according to claim 5, characterized in that, The membrane stretching mechanism includes: A first up-down driving unit is disposed on the mechanism frame and connected to the upper movable seat, so as to drive the upper movable seat to move in the up-down direction; And a second up-down drive unit, which is disposed on the mechanism frame and connected to the lower movable seat, so as to drive the lower movable seat to move in the up-down direction.

7. The film stretching mechanism according to claim 6, characterized in that, The first up-and-down driving unit is a cylinder mechanism or a lead screw mechanism; the second up-and-down driving unit is a pulley mechanism or a sprocket mechanism.

8. The film stretching mechanism according to claim 1, characterized in that, The upper movable seat and the lower movable seat respectively form a sliding pair with the mechanism frame, so as to be movably disposed on the mechanism frame in the vertical direction; the upper clamping device includes a clamping drive device, an upper clamping plate assembly and a pull-down guide assembly; A clamping drive device is respectively disposed on the left and right sides of the upper movable seat and is arranged opposite to each other in the left and right direction, and is used to drive the upper clamping plate assembly to clamp or release the diaphragm body; The upper clamping plate assembly extends in the left-right direction and includes an upper front clamping plate and an upper rear clamping plate arranged opposite each other in the front-back direction; the upper front clamping plate and the upper rear clamping plate are respectively connected to a clamping drive device arranged opposite each other in the left-right direction; the clamping drive device is used to drive the upper front clamping plate and the upper rear clamping plate to clamp or release the diaphragm body. A pull-down guide assembly includes a front stop and a rear stop arranged opposite to each other in a front-rear direction; the front stop is disposed on the upper front clamp and extends downward beyond the upper front clamp, and the rear stop is disposed on the upper rear clamp and extends downward beyond the upper rear clamp; The rear side of the front baffle is flush with the rear side of the upper front clamp, and the front side of the rear baffle is flush with the front side of the upper rear clamp.

9. The film stretching mechanism according to claim 8, characterized in that, The film stretching mechanism includes a guide rail, which is disposed on the mechanism frame; the upper movable seat and the lower movable seat respectively form the sliding pair with the guide rail through corresponding sliders.

10. The film stretching mechanism according to claim 1, characterized in that, The correction mechanism includes a front baffle and a rear baffle, and the flat guide hole is formed between the front baffle and the rear baffle; The front baffle and the rear baffle are separately provided, and the front baffle and the rear baffle are detachably provided on the mechanism frame; one of the front baffle and the rear baffle forms a concave platform and the other forms a convex platform; the concave platform and the convex platform are in concave-convex fit, and the flat guide hole is formed between the concave platform and the convex platform.

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