Laser drilling device for casing production line

Abstract

The invention discloses a casing production line laser drilling device, and relates to the technical field of casing processing, the casing production line laser drilling device comprises an unwinding roller and a winding roller which are detachably and rotatably installed at the two ends of the inner side of a box bottom respectively, and a rotating shaft of the unwinding roller and a rotating shaft of the winding roller are connected through a driving mechanism; the unwinding roller and the winding roller are synchronously driven to rotate through the driving mechanism, and the number of turns or angles of single rotation of the unwinding roller and the winding roller is adjusted according to the unwinding or winding amount; the spreading mechanism is mounted between the unwinding roller and the winding roller, and the casings are continuously stirred in the radial direction through the spreading mechanism, so that dynamic self-adaptive tightening of unwinding and winding is realized, and the problems of loosening and deviation of the casings are solved; the rotation turns / angles of the two rollers can be automatically adjusted according to the casing diameter change of the unwinding roller and the winding roller, the stroke tail end of the different-tooth roller can be switched for driving, it is ensured that casings are in a tightened state in the length direction in the whole process, and the conveying stability is improved.

Description

Technical Field

[0001] This invention relates to the technical field of sausage casing processing, specifically to a laser drilling device for a sausage casing production line. Background Technology

[0002] Sausage casings are tough, semi-transparent films made from the large or small intestine of livestock through scraping. They are classified by animal type (pig casings, sheep casings, and cattle casings) and by part of the intestine (large intestine casings and small intestine casings). Their main use is as outer packaging material for sausage making. Sheep casings can also be processed into gut for tennis racket strings, surgical sutures, and other products. The intestine consists of four layers from the inside out: mucosa, submucosa, muscularis propria, and serosa. The processing techniques for each layer vary depending on the animal and the requirements of the finished product.

[0003] The main purpose of perforating sausage casings is to expel air and moisture from inside the sausage. This accelerates the drying process and prevents the casing from bursting due to excessive air pressure during drying. For example, the "Fermented Sausage Filling and Perforating Device" (CN220292915U) uses a mechanical perforation method with a needle and simply positions the casing using a pressure plate. This type of equipment, along with traditional laser perforation devices, generally suffers from the following problems: 1. The tension of unwinding and rewinding sausage casings needs to be adjusted manually, which cannot adapt to changes in the diameter of the casings and can easily lead to the casings becoming loose or overstretched. Second, the paving mechanism is mostly unidirectional, which does not completely smooth out the wrinkles and is easy to scratch the casing; Third, the separation of cleaning and punching processes leads to dirt on the sausage casing surface affecting punching accuracy and increasing the processing steps. Fourth, the power mechanism is dispersed, occupies a large space and has insufficient protection, the components are easily damaged, and the operation and maintenance costs are high; 5. Poor drilling positioning accuracy can easily lead to uneven hole diameter and positional deviation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a laser perforation device for sausage casing production lines, which solves the problems of being unable to adapt to changes in sausage casing diameter and incomplete smoothing of wrinkles, which can easily lead to loosening or excessive stretching of sausage casings.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser drilling device for a sausage casing production line, comprising a box bottom and a box top fixed to the box bottom, forming a processing box through the box bottom and box top, and further comprising: The unwinding roller and the take-up roller are detachably and rotatably installed at both ends of the inner side of the box bottom. The shafts of the unwinding roller and the take-up roller are connected by a drive mechanism. The drive mechanism drives the unwinding roller and the take-up roller to rotate synchronously, and adjusts the number of rotations or the angle of the unwinding roller and the take-up roller in one go according to the amount of unwinding or rewinding. The paving mechanism is installed between the unwinding roller and the take-up roller, and continuously moves the casing radially through the paving mechanism. A support plate is fixed inside the bottom of the box and between the take-up roller and the unwind roller. A laser punching machine is fixed on the support plate. A traction mechanism is installed at the bottom of the laser punching machine. The traction mechanism is used to tighten the sausage casing located directly below the laser punching machine.

[0006] Furthermore, the paving mechanism includes two symmetrically arranged supports fixed to the inner wall of the box bottom. Each of the two supports is fixed with four guide rods. Two guide members are slidably installed on the guide rods. The two guide members are located at the top and bottom of the support respectively. A paving roller is rotatably installed on each of the two guide members. Springs are sleeved at both ends of the four guide rods. The two paving rollers are connected by a dynamic sliding component. The spreading roller is fixed with a bidirectional threaded strip, and the ends of the bidirectional threaded strip are rounded.

[0007] Furthermore, the dynamic sliding assembly includes a first spline rod rotatably mounted on the bracket, with spline sleeves slidably mounted at both ends of the first spline rod. The two spline sleeves are respectively connected to the spreading roller through two bevel gear sets. A follower connector is also rotatably mounted on the spline sleeve, and the follower connector is fixed to the guide member.

[0008] Furthermore, the pulling mechanism includes a support member fixed inside the bottom of the box, a second pressure plate is provided on the support member, and a first pressure plate is provided on the second pressure plate; Multiple No. 1 positioning holes are provided on the No. 2 pressure plate. The No. 2 pressure plate is connected to the No. 2 limiting rod fixed on the support member through the No. 1 positioning holes. Multiple No. 1 limiting rods are fixed at the bottom of the No. 1 pressure plate. The No. 1 limiting rods are slidably connected to the No. 2 positioning holes provided on the No. 2 pressure plate and the support member. Both the No. 1 pressure plate and the No. 2 pressure plate are provided with arc-shaped parts on the side facing the unwinding roller, and the arc-shaped parts are located on the opposite side of the No. 1 pressure plate and the No. 2 pressure plate. Tensioning strips are fixed on opposite sides of the No. 1 and No. 2 pressure plates. Drilling slots are opened on both the No. 1 and No. 2 pressure plates, and the drilling slots are located directly below the laser drilling machine. Multiple limiting plates are fixed on the No. 1 pressure plate, and multiple limiting pieces can be detachably installed on the limiting plates.

[0009] Furthermore, the tensioning strip includes a parallel portion located on both sides of the perforated slot, and an inclined portion that smoothly transitions to the arc-shaped portion is fixed to one end of the parallel portion, forming a triangle through the two inclined portions; The end face of the tension bar is triangular.

[0010] Furthermore, a water storage box is fixed on the No. 1 pressure plate, and a drain hole is opened on the No. 1 pressure plate; A transmission disc is rotatably installed inside the support member, and a piston conveying component is rotatably installed on one side of the transmission disc. The piston rod of the piston conveying component is rotatably connected to the eccentric part of the transmission disc, and the discharge end of the piston conveying component is connected to the water storage box through a conveying pipe. The support component also houses a second motor, whose output shaft is connected to a transmission disc and two first spline rods via a first transmission chain.

[0011] Furthermore, both the No. 1 pressure plate and the No. 2 pressure plate are provided with a lower sludge trough; Both sides of the lower sludge trough on the No. 1 pressure plate are provided with guide grooves that communicate with it, and both sides of the No. 1 pressure plate are fixed with guide pipes that communicate with the guide grooves. A collection box is fixed on the support. A scraper is fixed on the side of the lower sludge tank away from the curved part. The scraper is made of a deformable flexible material.

[0012] Furthermore, the drive mechanism includes two No. 2 spline rods rotatably mounted inside the bottom of the box. The two No. 2 spline rods are connected by a No. 2 transmission chain. A No. 1 gear and a No. 2 gear are axially slidably mounted on the two No. 2 spline rods respectively. A transmission rod is rotatably mounted on the opposite side of the No. 1 and No. 2 gears. A No. 1 gear is coaxially fixed on the transmission rod. The No. 1 gear cooperates with the No. 2 gear and the No. 1 gear. Two translational components for axial sliding of the No. 1 and No. 2 toothed rollers are installed inside the bottom of the box. The two No. 2 spline rods are connected to the shafts of the No. 1 and No. 2 toothed rollers via a switching assembly; The teeth of the second toothed roller shorten sequentially at equal intervals in a single direction.

[0013] Furthermore, the translation component includes multiple threaded holes on the first and second gear rollers, and a reciprocating screw that is threadedly engaged with the threaded hole is installed in the threaded hole. Positioning plates are rotatably installed at both ends of the reciprocating screw. The positioning plates are rotatably installed on the inner wall of the bottom of the box. A toothed ring that meshes with the second gear is sleeved on the positioning plate. The toothed ring is fixed to the inner wall of the bottom of the box.

[0014] Furthermore, the switching assembly includes a tilting plate rotatably mounted on the opposite side of the unwinding roller and the take-up roller, a No. 3 gear coaxially fixed on the rotating shafts of the unwinding roller and the take-up roller, and a No. 4 gear and a No. 5 gear rotatably mounted at both ends of the tilting plate, wherein the No. 3 gear engages with the No. 4 gear or the No. 5 gear. The two transmission rods are respectively connected to the fourth gear via the third transmission chain, and the transmission rods are also cross-connected to the fifth gear via the fourth transmission chain; An electric push rod is rotatably mounted on the side of the flip plate away from the No. 3 gear, and the movable rod of the electric push rod is rotatably connected to the flip plate.

[0015] The present invention has the following beneficial effects: 1. The laser punching device in this sausage casing production line enables dynamic adaptive tensioning during unwinding and rewinding, solving the problem of sausage casing slack and shifting. It can automatically adjust the number of rotations / angle of the two rollers according to the change in casing diameter of the unwinding roller and the rewinding roller, and the drive can be switched at the end of the stroke of the toothed roller to ensure that the casing is taut in the length direction throughout the entire process, thus improving the stability of conveying.

[0016] Second, the laser drilling device in this sausage casing production line achieves bidirectional synchronous spreading and leveling, adapting to multiple types of sausage casings without damage; The paving mechanism drives the paving roller to rotate through the No. 2 motor linked with the No. 1 spline rod and bevel gear set. The bidirectional threaded strip applies a pushing force synchronously from the top and bottom sides of the casing. With the help of springs to adaptively adjust the clamping force, it can efficiently spread out radial wrinkles and avoid scratching the casing through the smooth ends of the threaded strip. At the same time, it can be adapted to casings of different thicknesses and materials. Compared with the traditional unidirectional paving structure, it has a better leveling effect and wider applicability.

[0017] Third, the laser drilling device of this sausage casing production line achieves an integrated design of cleaning and tensioning, ensuring the cleanliness of the drilling base surface.

[0018] In the traction mechanism, the triangular tensioning strip tightens the casing in the width direction while the No. 2 motor synchronously drives the piston conveyor to supply water. After softening the stains, they are scraped off by the flexible scraper. The dirt is collected in a central channel and pipe, eliminating the need for additional cleaning procedures. This avoids the stains affecting the laser drilling accuracy and protects the integrity of the casing through the flexible scraper.

[0019] IV. The laser drilling device in this sausage casing production line features double tension positioning, which improves the accuracy and consistency of laser drilling. The casing is double-tensioned by the drive mechanism (length direction) and the tensioning strip (width direction), and the positioning constraint of the punching slot ensures that the punching area is flat and without displacement. The galvanometer scanning component and focusing lens of the laser punching machine work together to precisely control the size and path of the light spot. Combined with the non-contact punching characteristics, it effectively reduces the heat impact and solves the problems of uneven hole diameter and position deviation in traditional punching.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A structural diagram from another direction; Figure 3 for Figure 1 Exploded view; Figure 4 for Figure 3 Enlarged view of the local structure at point F; Figure 5 This is a schematic diagram of the internal structure of the box bottom in this invention; Figure 6 This is a schematic diagram of the paving mechanism in this invention; Figure 7 for Figure 6 Enlarged view of the local structure at point A; Figure 8 for Figure 6 A structural diagram from another direction; Figure 9 for Figure 8 Enlarged view of the local structure at point B; Figure 10 This is a schematic diagram of the spreading roller and bidirectional threaded strip in this invention; Figure 11 This is a schematic diagram of the traction mechanism in this invention; Figure 12 for Figure 11 Another structural diagram from another angle; Figure 13 This is an exploded view of the traction mechanism in this invention; Figure 14 for Figure 13 Enlarged view of the local structure at point C; Figure 15 for Figure 13 Enlarged view of the local structure at point D; Figure 16 for Figure 13 Another structural diagram from another angle; Figure 17 This is a schematic diagram of the translation component in this invention; Figure 18 for Figure 17 Enlarged view of the local structure at point E; Figure 19 for Figure 17 Exploded view; Figure 20 This is a schematic diagram of the structure of the No. 1 toothed roller and its teeth in this invention.

[0022] In the diagram: 1. Box bottom; 101. Box top; 102. Protective cover No. 1; 103. Motor No. 1; 2. Unwinding roller; 201. Limiting roller; 202. Rewinding roller; 3. Spreading roller; 301. Support; 302. Splined rod No. 1; 303. Drive chain No. 1; 304. Guide component; 305. Guide rod; 306. Spring; 307. Splined sleeve; 308. Bevel gear set; 309. Follow-up connector; 3010, bidirectional threaded strip; 4, support plate; 401, laser drilling machine; 402, support component; 403, second protective cover; 404, water storage box; 405, first pressure plate; 406, second pressure plate; 407, tensioning strip; 408, arc-shaped part; 409, limiting plate; 4010, drilling groove; 4011, first limiting rod; 4012, second limiting rod; 40 13. Limiting plate; 4014. Piston conveyor; 4015. Transmission disc; 4016. Motor No. 2; 4017. Scraper; 4018. Collection box; 4019. Guide channel; 4020. Guide pipe; 4022. Drain hole; 5. No. 1 gear; 501. No. 2 gear; 502. Transmission rod; 503. No. 1 gear; 504. No. 2 spline rod; 505. Reciprocating lead screw; 506. Gear No. 2; 507. Gear Ring; 508. Positioning Plate; 509. Transmission Chain No. 2; 5010. Threaded Hole; 5011. Splined Groove No. 2; 5012. Gear No. 3; 5013. Gear No. 4; 5014. Flip Plate; 5015. Gear No. 5; 5016. Transmission Chain No. 3; 5017. Transmission Chain No. 4; 5018. Electric Actuator; 5019. Tensioning Mechanism. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0025] The following is based on Figures 1-20 This invention describes a laser drilling device for a sausage casing production line provided in an embodiment of the present invention.

[0026] like Figures 1-20As shown, this embodiment of the invention provides a technical solution: a laser drilling device for a sausage casing production line, including a box bottom 1 and a box top 101 fixed on the box bottom 1, forming a processing box through the box bottom 1 and the box top 101, and further including: The unwinding roller 2 and the take-up roller 202 are detachably and rotatably installed at both ends of the inner side of the box bottom 1. The rotating shafts of the unwinding roller 2 and the take-up roller 202 are connected by a drive mechanism. The drive mechanism drives the unwinding roller 2 and the take-up roller 202 to rotate synchronously, and adjusts the number of rotations or the angle of the unwinding roller 2 and the take-up roller 202 in one go according to the amount of unwinding or rewinding. The spreading mechanism installed between the unwinding roller 2 and the take-up roller 202 continuously moves the casing radially. Support plate 4 is fixed inside the bottom of the box 1 and is located between the take-up roller 202 and the unwind roller 2. A laser punching machine 401 is fixed on the support plate 4. A traction mechanism is installed at the bottom of the laser punching machine 401. The casing directly below the laser punching machine 401 is tightened by the traction mechanism.

[0027] In this embodiment of the invention, the casing is simultaneously unwound and wound up by the unwinding roller 2 and the winding roller 202. The winding and unwinding of the casing causes the portion of the casing between the unwinding roller 2 and the limiting roller 201 to be conveyed. Two limiting rollers 201 are rotatably installed inside the bottom box 1. The limiting rollers 201 limit the casing and keep the conveyed part in a horizontal and flat state.

[0028] During transport, the casing is radially moved by the spreading mechanism to avoid excessive radial wrinkles in the casing, which would affect the perforation effect. The traction mechanism pulls and tightens the portion of the sausage casing directly below the laser punching machine 401 to ensure the casing is taut and flat, thereby improving the punching effect and accuracy.

[0029] When the laser drilling machine 401 is working, it punches holes in the sausage casing directly below the machine. The laser drilling machine 401 includes a laser generator, a galvanometer scanning assembly, and a focusing lens. The laser generator can meet the punching requirements of sausage casings of different thicknesses. The galvanometer scanning assembly is electrically connected to the laser generator and can control the deflection direction of the laser beam according to the preset punching path and parameters. The focusing lens is set at the output end of the galvanometer scanning assembly and focuses the laser beam into a tiny spot, which acts on the surface of the sausage casing to achieve punching. Laser punching has the advantages of non-contact, small heat-affected zone, and precise hole diameter, effectively ensuring the punching quality.

[0030] The paving mechanism includes two symmetrically arranged supports 301 fixed to the inner wall of the box bottom 1. Four guide rods 305 are fixed on each of the two supports 301. Two guide members 304 are slidably installed on the guide rods 305. The two guide members 304 are located at the top and bottom of the support 301, respectively. Spreading rollers 3 are rotatably installed on each of the two guide members 304. Springs 306 are sleeved at both ends of the four guide rods 305. The two spreading rollers 3 are connected by a dynamic sliding component. The spreading roller 3 is fixed with a bidirectional threaded strip 3010, and the ends of the bidirectional threaded strip 3010 are rounded.

[0031] In this embodiment of the invention, the sausage casing is transported between two supports 301; Two spreading rollers 3 are driven to rotate synchronously relative to each other by a dynamic sliding component. When the spreading rollers 3 rotate, they drive the bidirectional threaded strip 3010 to rotate (the bidirectional threaded strip 3010 has opposite helical directions, thus conveying in opposite directions). The bidirectional threaded strip 3010 applies a continuous pushing force synchronously to the top and bottom of the casing, so that the radial wrinkles of the casing are spread out by the pushing force. The rounded design of the ends of the bidirectional threaded strip 3010 can avoid scratching or damaging the surface of the casing, ensuring the integrity of the casing during the spreading process. During the continuous conveying of the casing, the two spreading rollers 3 maintain synchronous relative rotation under the action of the dynamic sliding component, so that the bidirectional threaded strip 3010 can perform continuous and uniform pushing operation on the top and bottom of the casing, effectively eliminating the adverse effects of wrinkles on the casing during conveying and subsequent processing steps, providing a flat processing base for subsequent processes such as laser drilling, and further improving the overall processing accuracy and product quality.

[0032] The guide rod 305 enables the guide limit when the two guide members 304 move relative to each other / opposite to each other. The spring 306 applies a force to the two guide members 304 to move relative to each other. This force is directly transmitted to the spreading roller 3, so that the two spreading rollers 3 apply a clamping force to the sausage casing when they rotate.

[0033] The clamping force can be precisely controlled by adjusting the preload of the spring 306 to accommodate casings of different thicknesses and materials. This prevents the casings from slipping or shifting during the spreading process due to insufficient clamping force, or from being excessively squeezed and deformed due to excessive clamping force. The guiding and limiting function of the guide rod 305 ensures the smoothness and stability of the dynamic sliding assembly when the two guide members 304 move relative to or in opposite directions, thereby ensuring the continuity and reliability of the bidirectional threaded strip 3010's spreading operation on the casings. The force provided by the spring 306 provides a continuous and stable power source for the entire clamping and spreading process, allowing the clamping force applied to the casings by the two spreading rollers 3 during rotation to work synergistically with the spreading force of the bidirectional threaded strip 3010. This ensures the positional stability of the casings during spreading and effectively spreads out wrinkles, further improving the flatness and processing quality of the casing spreading.

[0034] The dynamic sliding assembly includes a first spline rod 302 rotatably mounted on the bracket 301. Spline sleeves 307 are slidably mounted on both ends of the first spline rod 302. The two spline sleeves 307 are respectively connected to the spreading roller 3 through two bevel gear sets 308. A follower connector 309 is also rotatably mounted on the spline sleeve 307. The follower connector 309 is fixed to the guide member 304.

[0035] In this embodiment of the invention, two No. 1 spline rods 302 are synchronously driven to rotate. When the No. 1 spline rods 302 rotate, the spline sleeves 307 at both ends are synchronously driven to rotate. When the spline sleeves 307 rotate, the spreading rollers 3 are driven to rotate through the bevel gear set 308. When the two guide members 304 slide relative to each other, the two spline sleeves 307 are driven to move synchronously with the guide members 304 through the follower connector 309, so as to realize that the two spreading rollers 3 do not disengage from the transmission of the spreading rollers 3 when they move relative to each other or in opposite directions.

[0036] The pulling mechanism includes a support member 402 fixed inside the bottom of the box 1, a second pressure plate 406 is provided on the support member 402, and a first pressure plate 405 is provided on the second pressure plate 406; Multiple positioning holes are provided on the second pressure plate 406. The second pressure plate 406 is connected to the second limiting rod 4012 fixed on the support member 402 through the positioning holes. Multiple limiting rods 4011 are fixed at the bottom of the first pressure plate 405. The first limiting rods 4011 are slidably connected to the positioning holes provided on the second pressure plate 406 and the support member 402. Both the first pressure plate 405 and the second pressure plate 406 are provided with an arc-shaped part 408 on the side facing the unwinding roller 2. The arc-shaped part 408 is located on the opposite side of the first pressure plate 405 and the second pressure plate 406. Tensioning strips 407 are fixed on opposite sides of the first pressure plate 405 and the second pressure plate 406. Drilling slots 4010 are opened on both the first pressure plate 405 and the second pressure plate 406, and the drilling slots 4010 are located directly below the laser drilling machine 401. Multiple limiting plates 409 are fixed on the first pressure plate 405, and multiple limiting pieces 4013 can be detachably installed on the limiting plates 409.

[0037] In this embodiment of the invention, the sausage casing is conveyed between the first pressure plate 405 and the second pressure plate 406. During the conveying process, it is spread out and pressed by cooperating with the tensioning strip 407, so that the sausage casing is radially tightened at the perforation slot 4010, ensuring that the sausage casing remains flat and horizontal when the laser perforator 401 punches holes in the sausage casing through the perforation slot 4010.

[0038] Specifically, the casing unfolding process is as follows: When the casing is conveyed, it first moves through the arc-shaped part 408 to between the first pressure plate 405 and the second pressure plate 406. Then, the tensioning strip 407 unfolds the casing by scraping from the middle to both sides. The tensioning strip 407 is triangular (open at the tail) and is also rounded.

[0039] The main function of the limiting piece 4013 is to apply a specified gravity to the first pressure plate 405 to adjust the force during movement between the first pressure plate 405 and the second pressure plate 406. This force adjustment method is equivalent to using a spring. In this embodiment, the applied force can be increased or decreased by increasing or decreasing the number of limiting pieces 4013, thereby achieving better controllability. Considering that sausage casing is a fragile membrane material, too little pressure will easily lead to insufficient spreading of the casing, while too much pressure will easily cause damage to the casing. In addition, the spreading method using the tension strip 407 has a high spreading efficiency, and the contact area between the tension strip 407 and the casing is relatively small. Therefore, accurately controlling the downward pressure of the first pressure plate 405 is particularly crucial.

[0040] After the sausage casing is unfolded and compressed, the laser drilling process begins. The laser beam emitted by the laser drilling machine 401 is precisely aligned with the drilling slot 4010. Since the sausage casing is radially taut and flat at this point, the laser can create uniform and regular holes on the surface. The design of the drilling slot 4010 not only provides a precise channel for the laser but also further positions and constrains the sausage casing, preventing displacement due to the impact of the laser or its own elastic contraction during drilling, thus ensuring the accuracy and consistency of the drilling position. After drilling, the sausage casing continues to move forward under the conveyor belt, entering subsequent processing steps. Throughout the entire process, from the introduction, unfolding, and compression of the sausage casing to precise drilling, all components work together, effectively solving the problems of poor drilling quality and low efficiency caused by unevenness and easy breakage of the sausage casing in traditional casing drilling processes. It is particularly suitable for production scenarios with high requirements for drilling accuracy and casing integrity.

[0041] The tensioning strip 407 includes a parallel part located on both sides of the perforated slot 4010. An inclined part that smoothly transitions to the parallel part is fixed to one end of the parallel part facing the arc-shaped part 408, forming a triangle through the two inclined parts. The end face of tension bar 407 is triangular.

[0042] A water storage box 404 is fixed on the first pressure plate 405, and a drain hole 4022 is opened on the first pressure plate 405. A transmission disk 4015 is rotatably installed inside the support member 402. A piston conveying member 4014 is rotatably installed on one side of the transmission disk 4015. The piston rod of the piston conveying member 4014 is rotatably connected to the eccentric part of the transmission disk 4015. The discharge end of the piston conveying member 4014 is connected to the water storage box 404 through a conveying pipe. The support member 402 also has a second motor 4016 fixed inside. The output shaft of the second motor 4016 is connected to the transmission disc 4015 and two first spline rods 302 through the first transmission chain 303.

[0043] In this embodiment of the invention, when the No. 2 motor 4016 is working, its output shaft synchronously drives the transmission disc 4015 and the two No. 1 spline rods 302 to rotate through the No. 1 transmission chain 303. When the transmission disc 4015 rotates, it cooperates with the piston conveying component 4014 to make the piston rod of the piston conveying component 4014 reciprocate, thereby supplying water to the water storage box 404 through the reciprocating motion of the piston conveying component 4014. At the same time, the water in the water storage box 404 will be discharged through the drain hole 4022 to the space between the No. 1 pressure plate 405 and the No. 2 pressure plate 406 to soften the stains attached to the surface of the sausage casing.

[0044] As water flows between the first pressure plate 405 and the second pressure plate 406, it not only softens the stains on the surface of the sausage casing, but also moistens the casing to a certain extent, reducing frictional damage to the casing during subsequent processing.

[0045] Both the No. 1 pressure plate 405 and the No. 2 pressure plate 406 are provided with a lower sludge trough; Both sides of the lower sludge trough on the first pressure plate 405 are provided with guide channels 4019 that communicate with it. Both sides of the first pressure plate 405 are fixed with guide pipes 4020 that communicate with the guide channels 4019. A collection box 4018 is fixed on the support member 402. A scraper 4017 is fixed on the side of the lower sludge tank away from the arc-shaped part 408. The scraper 4017 is made of a deformable flexible material.

[0046] In this embodiment of the invention, water softens the stains on the surface of the sausage casing, making them easier to remove when external force is applied to the casing surface. During the casing transport process, the scraper 4017 applies a scraping force to the casing surface, separating the water and stains adhering to the casing from the casing, preventing the stains from affecting the laser perforation effect.

[0047] Secondly, the scraped water and stains enter the collection box 4018 through the lower sludge trough and are collected there. It should be noted that the stains and water in the lower sludge trough on the first pressure plate 405 enter the collection box 4018 under the guidance of the guide pipe 4020 and the guide channel 4019.

[0048] The scraper 4017 is made of a deformable flexible material, which allows it to better adapt to the unevenness of the casing surface when it comes into contact with the casing surface and applies scraping force. This ensures a close fit to the casing surface, thereby improving the thoroughness of stain removal. At the same time, it avoids the mechanical damage that rigid scraping structures may cause to the casing, effectively protecting the integrity of the casing.

[0049] The deformable nature of the scraper blade 4017 also allows it to compensate for dimensional changes caused by wear through its own deformation during long-term use, thus extending its service life and reducing equipment maintenance costs.

[0050] The drive mechanism includes two second spline rods 504 rotatably mounted inside the bottom of the box 1. The two second spline rods 504 are connected by a second transmission chain 509. A first gear roller 5 and a second gear roller 501 are axially slidably mounted on the two second spline rods 504 respectively. A transmission rod 502 is rotatably mounted on the opposite side of the first gear roller 5 and the second gear roller 501. A first gear 503 is coaxially fixed on the transmission rod 502. The first gear 503 cooperates with the second gear roller 501 and the first gear roller 5. Two translational components for axial sliding of the first toothed roller 5 and the second toothed roller 501 are installed inside the bottom box 1. Two No. 2 spline rods 504 are connected to the shafts of No. 1 toothed roller 5 and No. 2 toothed roller 501 via a switching assembly; The teeth of the second toothed roller 501 shorten sequentially at equal intervals in a single direction.

[0051] In this embodiment of the invention, a No. 1 motor 103 is fixed to the outer wall of the bottom of the box 1. The output shaft of the No. 1 motor 103 is coaxially fixed with one of the No. 2 spline rods 504. When the No. 1 motor 103 is working, its output shaft drives one of the No. 2 spline rods 504 to rotate. Under the transmission of the No. 2 transmission chain 509, the two No. 2 spline rods 504 rotate synchronously.

[0052] When the second spline rod 504 rotates, it drives the second toothed roller 501 and the first toothed roller 5 to rotate synchronously, thereby activating the translation component. The translation component drives the second toothed roller 501 and the first toothed roller 5 to produce relative or opposite movements. During the rotation of the second toothed roller 501 and the first toothed roller 5, their teeth mesh with the first gear 503, thereby driving the first gear 503 and the transmission rod 502 to rotate. Simultaneously, the second toothed roller 501 and the first toothed roller 5 perform relative or opposite axial movements, resulting in meshing with the first gear 503. The number of teeth gradually decreases or increases; when the transmission rod 502 rotates, it drives the unwinding roller 2 and the take-up roller 202 to rotate through the switching component; the technical effect achieved is that, as the unwinding process proceeds, the number of rotations or the angle of the unwinding roller 2 gradually decreases, while as the take-up process proceeds, the number of rotations or the angle of the take-up roller 202 gradually increases, so that the casing of the conveyed part between the unwinding roller 2 and the take-up roller 202 is always kept taut; combined with the action of the traction component, the casing of the perforated slot 4010 part is kept taut in both the length and width directions.

[0053] As the teeth of the second toothed roller 501 shorten sequentially at equal intervals in a single direction, during the axial sliding of the second toothed roller 501 and its meshing with the first gear 503, the rotation angle of the first gear 503 will gradually change per unit time as the teeth gradually shorten. This allows the switching components to dynamically adjust the rotation speed or rotation amount of the unwinding roller 2 and the take-up roller 202.

[0054] This allows the unwinding roller 2 to adapt to a larger unwinding amount in the early stages of casing unwinding because the casing roll diameter is relatively large. As unwinding progresses, the casing roll diameter gradually decreases. At this time, the tooth length of the meshing gear 501 and gear 503 changes, automatically reducing the rotation number or angle of the unwinding roller 2 to prevent the casing from loosening due to excessive unwinding. Similarly, during the winding process, as the diameter of the casing increases, the meshing state of gear 503 and gear 501 changes, and the number of rotations or the angle gradually increases. This ensures that the casing can be tightly wound during winding, and maintains the tension of the casing conveyed between unwinding roller 2 and winding roller 202. This effectively avoids the impact of subsequent pulling components on the tension of the casing in the length and width directions of the perforated slot 4010 due to casing loosening, thus ensuring the stability of the entire casing processing process.

[0055] The translation component includes multiple threaded holes 5010 formed on the first toothed roller 5 and the second toothed roller 501. A reciprocating screw 505 with threaded engagement with the threaded hole 5010 is installed in the threaded hole 5010. Positioning disks 508 are rotatably installed at both ends of the reciprocating screw 505. The positioning disks 508 are rotatably installed on the inner wall of the box bottom 1. A toothed ring 507 that meshes with the second gear 506 is sleeved on the positioning disk 508. The toothed ring 507 is fixed to the inner wall of the box bottom 1.

[0056] In this embodiment of the invention, when the first toothed roller 5 rotates, it drives the reciprocating screw 505 to rotate around the center of the first toothed roller 5. When the reciprocating screw 505 rotates, it drives the reciprocating screw 505 to rotate by meshing with the gear ring 507. When the reciprocating screw 505 rotates, it drives the first toothed roller 5 to reciprocate along the axis of the second spline rod 504 by threaded engagement with the threaded hole 5010. Similarly, the second toothed roller 501 also reciprocates when rotating, and the second toothed roller 501 moves relative to or in opposite directions to the first toothed roller 5.

[0057] The switching assembly includes a tilting plate 5014 rotatably mounted on the opposite side of the unwinding roller 2 and the take-up roller 202. A No. 3 gear 5012 is coaxially fixed on the rotating shaft of the unwinding roller 2 and the take-up roller 202. A No. 4 gear 5013 and a No. 5 gear 5015 are rotatably mounted at both ends of the tilting plate 5014, respectively. The No. 3 gear 5012 cooperates with the No. 4 gear 5013 or the No. 5 gear 5015. The two transmission rods 502 are respectively connected to the fourth gear 5013 via the third transmission chain 5016, and the transmission rods 502 are also cross-connected to the fifth gear 5015 via the fourth transmission chain 5017. An electric push rod 5018 is rotatably mounted on the side of the flip plate 5014 away from the third gear 5012, and the movable rod of the electric push rod 5018 is rotatably connected to the flip plate 5014.

[0058] In this embodiment of the invention, for ease of description, the third gear 5012 on the unwinding roller 2 is named the first gear, the fourth gear 5013 that cooperates with the first gear is named the second gear, and the fifth gear 5015 is named the third gear. The third gear 5012 on the take-up roller 202 is named the fourth gear, the fourth gear 5013 that meshes with the fourth gear is the fifth gear, and the fifth gear 5015 is the sixth gear. The two transmission rods 502 are named the first transmission rod and the second transmission rod, respectively. The first transmission rod is connected to the second gear via the third transmission chain 5016, and the first transmission rod is also connected to the sixth gear via the fourth transmission chain 5017. The second drive rod is connected to the fifth gear via another third drive chain 5016. The second drive rod is also connected to the third gear via another fourth drive chain 5017. The above-mentioned cross connection means that the two fourth drive chains 5017 are installed in a cross manner.

[0059] As mentioned above, the two transmission rods 502 rotate synchronously, that is, the first transmission rod and the second transmission rod rotate synchronously. The rotation of the first transmission rod and the second transmission rod synchronously drives the second gear, the third gear, the fifth gear and the sixth gear to rotate synchronously. When the second and fifth gears rotate, they mesh with the first and fourth gears to drive the unwinding roller 2 and the take-up roller 202 to rotate synchronously. At this time, the number of rotations or angles of the unwinding roller 2 are gradually reduced by the teeth of the first toothed roller 5. Meanwhile, the number of rotations or angles of the take-up roller 202 are gradually increased by the teeth of the second toothed roller 501. Since the first toothed roller 5 and the second toothed roller 501 are driven by the reciprocating screw 505 to move in opposite directions, they move in the opposite direction when they reach the end of their stroke. When the first toothed roller 5 reaches the end of its stroke, its part with the most teeth meshes with the first gear 503 on the first transmission rod. Similarly, the second toothed roller 501, with its part with the fewest teeth, meshes with the first gear 503 on the second transmission rod. Obviously, if the first toothed roller 5 continues to rotate, driving the unwinding roller 2 to rotate, it will gradually increase the number of rotations or the angle of the unwinding roller 2. However, if the second toothed roller 501 continues to rotate, driving the take-up roller 202 to rotate, it will gradually decrease the number of rotations or the angle of the take-up roller 202. This obviously does not meet the requirements of synchronous unwinding and take-up. In this embodiment, two electric push rods 5018 synchronously drive two flip plates 5014 to flip, causing the second gear to disengage from the first gear and the third gear to engage with the first gear. At the same time, the fifth gear disengages from the fourth gear and the sixth gear engages with the fourth gear. The driving direction was reversed, so that the first toothed roller 5 drives the take-up roller 202 and the second toothed roller 501 drives the unwinding roller 2. When the first toothed roller 5 and the second toothed roller 501 move back and forth after reaching the end of their stroke, the synchronous unwinding and rewinding of the unwinding roller 2 and the take-up roller 202 can still be ensured.

[0060] Secondly, tensioning mechanisms 5019 are installed in both the third transmission chain 5016 and the fourth transmission chain 5017. The tensioning mechanisms 5019 are used to elastically adjust the tension of the third transmission chain 5016 and the fourth transmission chain 5017, so that the tension of the third transmission chain 5016 and the fourth transmission chain 5017 is ensured when the flipping plate 5014 flips. The specific structure of the tensioning mechanism 5019 is not specifically limited in this invention.

[0061] A first protective cover 102 for protecting the switching component is fixed on one side of the bottom of the box 1, and a second protective cover 403 for preventing water from contacting the second motor 4016 is fixed inside the support member 402.

[0062] This device utilizes a multi-mechanism coordinated transmission system, including the bottom box 1, the unwinding roller 2, and the rewinding roller 202, to achieve automatic casing feeding, leveling, cleaning, tensioning, and precise laser perforation, ensuring casing stability and perforation quality throughout the process. The drive mechanism is the core power source. A motor 103 on the outer wall of the bottom box 1 drives a second splined rod 504 to rotate, which in turn drives another second splined rod 504 via a second transmission chain 509, thus driving the first and second toothed rollers 501 on the rod to rotate synchronously. The rotation of the toothed rollers drives the reciprocating screw 505 in circumferential motion. The reciprocating screw 505 rotates through a gear 506 meshing with a fixed gear ring 507, and through a threaded connection, drives the toothed rollers to reciprocate axially along the second splined rod 504. The teeth of the toothed roller mesh with the first gear 503 on the transmission rod 502, driving the transmission rod 502 to rotate. This rotation is then driven by the third transmission chain 5016 and the fourth transmission chain 5017, which in turn drive the gears at both ends of the switching assembly flip plate 5014. Ultimately, this causes the unwinding roller 2 and the take-up roller 202 to rotate synchronously. The number of rotations / angles of the two rollers are adjusted by changing the teeth of the second toothed roller 501 to maintain the casing tension. When the toothed roller reaches the end of its stroke, the electric push rod 5018 drives the flip plate 5014 to flip and switch the meshing gears to adapt to the unwinding and take-up directions.

[0063] The sausage casing is released by the unwinding roller 2 and kept horizontal by two limiting rollers 201 before being conveyed to the spreading mechanism. A second motor 4016 within the support member 402 drives two first splined rods 302 to rotate via a first transmission chain 303. These splined rods drive splined sleeves 307 at both ends, which in turn drive the spreading roller 3 to rotate via a bevel gear set 308. The guide member 304 moves with the splined sleeves 307, and the guide rod 305 provides limiting guidance. A spring 306 applies force to the guide member 304 and transmits it to the spreading roller 3, causing the two rollers to clamp the sausage casing. The rotating spreading roller 3 applies a pushing force to the sausage casing vertically through a bidirectional threaded strip 3010, spreading out the folds. The ends of the threaded strip are rounded to avoid damaging the sausage casing.

[0064] After being leveled, the casing is guided between the two plates via the arc-shaped sections 408 of the first pressure plate 405 and the second pressure plate 406. The triangular tensioning strip 407 scrapes the casing from the middle to both sides. The limiting piece 4013 on the first pressure plate 405 adjusts the pressure of the two plates by gravity, making the casing tight and taut. At the same time, the second motor 4016 drives the transmission disc 4015 inside the support member 402 to rotate. Its eccentric part drives the piston rod of the piston conveying member 4014 to reciprocate, supplying water to the water storage box 404. The water flows into the space between the two plates through the drain hole 4022 to soften the dirt. The flexible scraper 4017 scrapes away the dirt and water, and the water flows into the collection box 4018 through the lower sludge trough, the guide trough 4019 and the guide pipe 4020.

[0065] The sausage casing is finally conveyed to the punching slot 4010, where it is tensioned in both length and width by the tensioning strip 407 and the drive mechanism. The laser punching machine 401 on the support plate 4 is started, and the laser generator produces a laser beam adapted to the thickness of the sausage casing. The galvanometer scanning component controls the deflection of the laser beam, and the focusing lens focuses it into a tiny spot, which is then punched through the punching slot 4010. After punching, the take-up roller 202 rewinds the casing, and the unwind roller 2 unwinds it synchronously, achieving continuous operation in a cycle. The first protective cover 102 and the second protective cover 403 protect the switching component and the second motor 4016, respectively, ensuring the stable operation of the mechanism.

[0066] The drive mechanism is the core power source. The No. 1 motor 103 on the outer wall of the bottom of the box 1 drives one of the No. 2 spline rods 504 to rotate. Through the No. 2 transmission chain 509, it drives the other No. 2 spline rod 504 to rotate synchronously, which in turn drives the No. 1 toothed roller 5 and the No. 2 toothed roller 501 on the rod to rotate synchronously. When the No. 1 toothed roller 5 and the No. 2 toothed roller 501 rotate, they drive the reciprocating screw 505 to rotate circumferentially. The reciprocating screw 505 rotates by meshing with the fixed gear ring 507 through the No. 2 gear 506. The rotating reciprocating screw 505 drives the No. 1 toothed roller 5 and the No. 2 toothed roller 501 to reciprocate along the axial direction of the No. 2 spline rod 504 through the threaded engagement. During rotation, the teeth of the toothed roller mesh with the first gear 503 on the transmission rod 502, driving the transmission rod 502 to rotate. The transmission rod 502, through the third transmission chain 5016 and the fourth transmission chain 5017, drives the gears at both ends of the flip plate 5014 of the switching assembly to rotate, ultimately driving the unwinding roller 2 and the take-up roller 202 to rotate synchronously. The number of rotations / angles of the two rollers are adjusted by the change in the teeth of the second toothed roller 501 to maintain the tension of the casing. When the toothed roller reaches the end of its stroke, the electric push rod 5018 drives the flip plate 5014 to flip, switching the meshing gears to ensure that the unwinding and take-up directions are matched.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0068] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A laser drilling device for a sausage casing production line, comprising a box bottom (1) and a box top (101) fixed on the box bottom (1), forming a processing box through the box bottom (1) and the box top (101), characterized in that, Also includes: The unwinding roller (2) and the take-up roller (202) are detachably and rotatably installed on both ends of the inner side of the bottom of the box (1). The shafts of the unwinding roller (2) and the take-up roller (202) are connected by a drive mechanism. The drive mechanism drives the unwinding roller (2) and the take-up roller (202) to rotate synchronously. The number of rotations or angles of the unwinding roller (2) and the take-up roller (202) are adjusted according to the amount of unwinding or rewinding. The paving mechanism is installed between the unwinding roller (2) and the rewinding roller (202), and continuously moves the casing radially through the paving mechanism; A support plate (4) is fixed inside the bottom of the box (1) and between the take-up roller (202) and the unwind roller (2). A laser punching machine (401) is fixed on the support plate (4). A pulling mechanism is installed at the bottom of the laser punching machine (401). The casing directly below the laser punching machine (401) is tightened by the pulling mechanism.

2. The laser drilling device for a sausage casing production line according to claim 1, characterized in that, The paving mechanism includes two symmetrically arranged supports (301) fixed to the inner wall of the box bottom (1). Four guide rods (305) are fixed on each of the two supports (301). Two guide members (304) are slidably installed on the guide rods (305). The two guide members (304) are located at the top and bottom of the supports (301) respectively. Spreading rollers (3) are rotatably installed on each of the two guide members (304). Springs (306) are sleeved at both ends of the four guide rods (305). The two spreading rollers (3) are connected by a dynamic sliding component. The spreading roller (3) is fixed with a bidirectional threaded strip (3010), and the ends of the bidirectional threaded strip (3010) are rounded.

3. The laser drilling device for a sausage casing production line according to claim 2, characterized in that, The dynamic sliding assembly includes a first spline rod (302) rotatably mounted on the bracket (301). Spline sleeves (307) are slidably mounted on both ends of the first spline rod (302). The two spline sleeves (307) are respectively connected to the spreading roller (3) through two bevel gear sets (308). A follower connector (309) is also rotatably mounted on the spline sleeve (307). The follower connector (309) is fixed to the guide (304).

4. The laser drilling device for a sausage casing production line according to claim 3, characterized in that, The pulling mechanism includes a support member (402) fixed inside the bottom of the box (1), a second pressure plate (406) is provided on the support member (402), and a first pressure plate (405) is provided on the second pressure plate (406). Multiple positioning holes are provided on the second pressure plate (406), and the second pressure plate (406) is connected to the second limiting rod (4012) fixed on the support member (402) through the positioning holes; multiple first limiting rods (4011) are fixed at the bottom of the first pressure plate (405), and the first limiting rods (4011) are slidably connected to the positioning holes provided on the second pressure plate (406) and the support member (402); Both the No. 1 pressure plate (405) and the No. 2 pressure plate (406) are provided with arc-shaped parts (408) on the side facing the unwinding roller (2), and the arc-shaped parts (408) are located on the opposite side of the No. 1 pressure plate (405) and the No. 2 pressure plate (406); Tensioning strips (407) are fixed on opposite sides of the first pressure plate (405) and the second pressure plate (406). A punching slot (4010) is opened on both the first pressure plate (405) and the second pressure plate (406), and the punching slot (4010) is located directly below the laser drilling machine (401). Multiple limiting plates (409) are fixed on the first pressure plate (405), and multiple limiting pieces (4013) can be detachably installed on the limiting plates (409).

5. The laser drilling device for a sausage casing production line according to claim 4, characterized in that, The tensioning bar (407) includes a parallel part, which is located on both sides of the perforated slot (4010). An inclined part that smoothly transitions to the parallel part is fixed at one end of the parallel part facing the arc-shaped part (408), and a triangle is formed by the two inclined parts. The end face of the tension bar (407) is triangular.

6. The laser drilling device for a sausage casing production line according to claim 5, characterized in that, A water storage box (404) is fixed on the first pressure plate (405), and a drain hole (4022) is opened on the first pressure plate (405). A transmission disc (4015) is rotatably installed inside the support member (402). A piston conveying member (4014) is rotatably installed on one side of the transmission disc (4015). The piston rod of the piston conveying member (4014) is rotatably connected to the eccentric part of the transmission disc (4015). The discharge end of the piston conveying member (4014) is connected to the water storage box (404) through a conveying pipe. The support member (402) also has a second motor (4016) fixed inside. The output shaft of the second motor (4016) is connected to the transmission disc (4015) and two first spline rods (302) through the first transmission chain (303).

7. The laser drilling device for a sausage casing production line according to claim 6, characterized in that, Both the No. 1 pressure plate (405) and the No. 2 pressure plate (406) are provided with a lower sludge trough; Both sides of the lower sludge trough on the No. 1 pressure plate (405) are provided with guide channels (4019) communicating with it. Both sides of the No. 1 pressure plate (405) are fixed with guide pipes (4020) communicating with the guide channels (4019). A collection box (4018) is fixed on the support member (402). A scraper (4017) is fixed on the side of the lower sludge tank away from the arc-shaped part (408). The scraper (4017) is made of a deformable flexible material.

8. The laser drilling device for a sausage casing production line according to claim 2, characterized in that, The drive mechanism includes two No. 2 spline rods (504) rotatably mounted in the bottom of the box (1). The two No. 2 spline rods (504) are connected by a No. 2 transmission chain (509). A No. 1 toothed roller (5) and a No. 2 toothed roller (501) are axially slidably mounted on the two No. 2 spline rods (504). A transmission rod (502) is rotatably mounted on the opposite side of the No. 1 toothed roller (5) and the No. 2 toothed roller (501). A No. 1 gear (503) is coaxially fixed on the transmission rod (502). The No. 1 gear (503) cooperates with the No. 2 toothed roller (501) and the No. 1 toothed roller (5). Two translational components for axial sliding of the first toothed roller (5) and the second toothed roller (501) are installed inside the bottom of the box (1); Two No. 2 spline rods (504) are connected to the shafts of No. 1 toothed roller (5) and No. 2 toothed roller (501) via a switching assembly; The teeth of the second toothed roller (501) shorten sequentially at equal intervals in a single direction.

9. A laser drilling device for a sausage casing production line according to claim 8, characterized in that, The translation component includes multiple threaded holes (5010) opened on the first toothed roller (5) and the second toothed roller (501). A reciprocating screw (505) with threaded engagement with the threaded hole (5010) is installed in the threaded hole (5010). A positioning plate (508) is rotatably installed at both ends of the reciprocating screw (505). The positioning plate (508) is rotatably installed on the inner wall of the box bottom (1). A toothed ring (507) that meshes with the second gear (506) is sleeved on the positioning plate (508). The toothed ring (507) is fixed to the inner wall of the box bottom (1).

10. A laser drilling device for a sausage casing production line according to claim 9, characterized in that, The switching assembly includes a flip plate (5014) rotatably mounted on the opposite side of the unwinding roller (2) and the winding roller (202). A No. 3 gear (5012) is coaxially fixed on the rotating shaft of the unwinding roller (2) and the winding roller (202). A No. 4 gear (5013) and a No. 5 gear (5015) are rotatably mounted on both ends of the flip plate (5014). The No. 3 gear (5012) cooperates with the No. 4 gear (5013) or the No. 5 gear (5015). The two transmission rods (502) are respectively connected to the fourth gear (5013) via the third transmission chain (5016), and the transmission rods (502) are also cross-connected to the fifth gear (5015) via the fourth transmission chain (5017). An electric push rod (5018) is rotatably mounted on the side of the flip plate (5014) away from the third gear (5012), and the movable rod of the electric push rod (5018) is rotatably connected to the flip plate (5014).

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