A sterile packaging film preparation device for medical devices and a preparation process thereof

Abstract

The present invention discloses a sterile packaging film preparation device for medical devices, comprising a machine base, a cross plate and a mounting roller arranged on the cross plate, the machine base is provided with a roll cabin on the outer wall of one side of the pressure roller assembly, and a traction cabin is provided on the outer wall of the other side of the pressure roller assembly, a first through hole and a second through hole are provided on both sides of the frame, a first driving assembly for driving a roll of unwound film to slide from the first through hole to the mounting roller is provided in the roll cabin, and a second driving assembly for traction of the mounting roller is provided in the traction cabin; a plurality of groups of roller components are provided on the outer peripheral side of the mounting roller, a positioning assembly is provided in the mounting roller for limiting the rotation of the roller assembly after the roll is moved and sleeved on the required position of the mounting roller, and a reset assembly is also provided in the mounting roller for restoring the roller assembly to an initial state of rotation. The present invention can quickly remove the roll from the mounting roller and quickly install a new roll on the mounting roller.

Description

Technical Field

[0001] The present invention relates to the field of packaging film processing, in particular to a sterile packaging film preparation device for medical devices and a preparation process thereof. Background Art

[0002] Medical-grade polyvinyl chloride film is generally a multi-layer co-extruded film with good softness, toughness and elasticity, and can conform well to the shape of medical devices.

[0003] When the existing film-making winding equipment winds up the film, the roll is installed on the winding equipment through the installation roller, and the film is wound on the roll. When the surface of the roll is wound, the installation roller needs to be removed and the air pressure inside the installation roller needs to be released so that the roll can be removed from the roller shaft, and then a new set of rolls is put on the installation roller, and the air pressure is injected again to press the roll on the installation roller. Since the roll needs to be manually disassembled and replaced, the replacement process wastes manpower and time, resulting in a decrease in the film winding efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a device for preparing a sterile packaging film for medical devices to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for preparing sterile packaging film for medical devices, comprising a machine base, a pressure wheel group slidably arranged on the front side of the machine base, and an ultrasonic cutting knife slidably arranged on the machine base, a cross plate is rotatably provided on the inner side of the machine base, the cross plates are symmetrically arranged on both sides of the machine base, and a film winding roller assembly is provided between the cross plates on both sides, the film winding roller assembly includes a pressure roller and an installation roller, the machine base is provided with a roll cabin on the outer wall of one side of the pressure roller assembly, and a traction cabin is provided on the outer wall of the other side of the pressure roller assembly, and the rotation of the cross plate can drive the installation roller to move between the winding position and the unwinding position Switching, the frame is provided with a first through hole between the reel cabin and the pressure roller assembly, and when the mounting roller is in the unloading position, the first through hole and a group of mounting rollers are in a coaxial position, and the frame is provided with a second through hole between the pressure roller assembly and the traction cabin, and the second through hole is coaxially arranged with the first through hole, and a first driving assembly for driving the reel of unwound film to slide from the first through hole to the mounting roller is provided in the reel cabin, and an expanded hole is provided at the cross plate near one side of the reel cabin for the rotating connection of the mounting roller, and a rotating connecting piece for limiting the mounting roller is provided inside the expanded hole, and a second driving assembly for pulling the mounting roller is provided in the traction cabin;

[0006] The outer periphery of the mounting roller is provided with multiple groups of roller components, and the mounting roller is provided with a positioning component for limiting the rotation of the roller component after the reel is moved and sleeved on the required position of the mounting roller. The mounting roller is also provided with a reset component for restoring the roller component to its initial state of rotation.

[0007] Preferably, the mounting roller is rotatably arranged on a cross plate, a tooth portion is provided on the side of the circumferential outer wall of the mounting roller close to the second through hole, a third motor is provided on the cross plate close to the second through hole, and the output end of the third motor extends into the cross plate and is connected to a gear disk engaged with the tooth portion.

[0008] Preferably, a storage chamber for placing the reel is provided in the reel cabin, and the first driving component includes a first motor, a first screw and a push plate. A driving chamber is provided at the bottom of the storage chamber, and a partition is provided between the storage chamber and the driving chamber. The first motor is arranged in the driving chamber and the output end is fixedly connected to the first screw. A linkage plate is provided on the threaded sleeve of the first screw, and the push plate is arranged at the bottom of the storage chamber and a connecting rod is connected to the linkage plate. A rod groove for horizontal sliding of the connecting rod is provided on the partition, and a partition component is provided on the side of the reel cabin located at the bottom of the storage chamber.

[0009] Preferably, the partition assembly includes a U-shaped plate and a first spring. A slide groove for horizontal sliding of the U-shaped plate is provided on the inner wall of the storage chamber. One end of the first spring is fixed on the inner wall of the slide groove away from the frame, and the other side is against the U-shaped plate. The first through hole opening is located at the bottom of the storage bin.

[0010] Preferably, the second drive assembly includes a second motor, a second screw rod, a connecting plate and an electromagnet. A connecting plate groove for the connecting plate to slide horizontally is provided in the traction cabin. The second motor is fixed in the connecting plate groove and the output end is fixedly connected to the second screw rod. The second screw rod passes through the connecting plate and forms a threaded connection. The electromagnet is fixed on the connecting plate and is opposite to the second through hole and is used to form a connection with the mounting roller.

[0011] Preferably, the roller component includes a pressure wheel portion and a meshing portion, the roller component is axially provided with a rotating shaft, the outer sleeve of the rotating shaft is provided with a one-way bearing, the outer ring of the one-way bearing is fixed in the mounting roller, and the inner ring is sleeved on the rotating shaft, the roller component is rotationally connected with the mounting roller through the one-way bearing, the positioning assembly includes a meshing rod arranged in the mounting roller, the meshing rod is provided with a plurality of groups corresponding to the number of roller components arranged on the same circumferential section of the mounting roller, the meshing rod is axially slidably arranged in the mounting roller along the mounting roller, each group of meshing rods is arranged in the mounting roller corresponding to the plurality of groups of roller components in the same axial direction of the mounting roller, the meshing rod is provided with a local tooth unit meshed with the plurality of meshing portions, the local tooth unit closest to the second through hole is initially meshed with the meshing portion closest to the second through hole, and the other local tooth units are initially not meshed with the meshing portion.

[0012] Preferably, the reset assembly includes side plates, a second spring, a screw and a hinged rod, the side plates are symmetrically arranged on both sides of the axial direction of the mounting roller and are located inside the mounting roller, the screw passes through the side plates on both sides and forms a rotating connection, the threaded sleeves on both sides of the screw are provided with shaft sleeves, the hinged rod is symmetrically arranged on both sides of each group of meshing rods and one end away from the meshing rods is hingedly arranged with the shaft sleeves corresponding to the two sides, a hollow groove is provided in the middle of the mounting roller, and plate grooves for sliding side plates are provided at both ends of the hollow groove, the second spring is provided in a side plate groove close to the first through hole and is used to resist the side plates, and the frame is also provided with a linkage assembly that drives the screw to rotate.

[0013] Preferably, the linkage assembly includes a linkage rod and a linkage shaft, the linkage shaft is rotatably arranged on the side of the installation roller close to the second through hole, one end of the linkage rod is fixedly connected to the screw, and the other end is inserted into the linkage shaft to form a sliding connection, the end of the electromagnet close to the screw is provided with a socket for inserting the linkage shaft, the outer shaft side of the linkage shaft is provided with a spiral groove, the inside of the socket is provided with a guide shaft matching the spiral groove, the side of the installation roller close to the second through hole is provided with an entrance groove for inserting the power supply magnet, the inner wall of the entrance groove is provided with a magnetic attraction portion that is magnetically attracted to the electromagnet, and a torsion spring is connected between the linkage shaft and the installation roller.

[0014] Preferably, a protrusion is provided on the side of the connecting plate opposite to the second through hole, and a protrusion is provided on the protrusion, one end of the protrusion is inserted into the electromagnet, and a limit plate is provided on the end of the protrusion inserted into the electromagnet, and a limit groove is provided in the electromagnet for the limit plate to slide horizontally.

[0015] A process for preparing a sterile packaging film for medical devices comprises the following steps:

[0016] Step 1: The corona layer, the middle layer and the easy-peel layer are put into a three-layer co-extrusion cast film machine to obtain a three-layer composite film material;

[0017] Step 2: The three-layer composite film is subjected to thickness measurement, corona treatment, winding, plasticization, and slitting to obtain a packaging film for medical packaging.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By providing a reel compartment, reels can be stored, and a new set of reels can be pushed onto the mounting roller after the reels on the mounting roller are taken off by a first drive assembly in the reel compartment;

[0020] A traction cabin is provided on one side of the frame, and a second drive assembly is provided in the traction cabin. After the roll on the installation roller is wound with the packaging film, the installation roller can be pulled out from the second through hole, so that the roll wound with the packaging film falls and is transported to a collection position;

[0021] A roller component is provided on the installation roller, and an engaging rod is provided inside the installation roller. The engaging rod is provided with a partial gear unit that meshes with the roller component. When the reel is slidably mounted on the installation roller, the reel drives the roller component to rotate. After the engaging rod meshes with the gear component through the partial gear unit and moves to a position where it cannot move, the roller component cannot move further, thereby restricting the reel to a position where the packaging film needs to be wound.

[0022] When the installation roller needs to be pulled into the traction cabin through the traction assembly, the screw can be driven to rotate through the cooperation of the guide shaft on the electromagnet and the spiral groove on the linkage shaft, so that the multiple sets of engaging rods move along the radial inner side of the installation roller, thereby disengaging the local tooth unit from the engagement with the roller component, making it easier to pull the installation roller out of the reel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the packaging film process of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the device of the present invention;

[0026] Figure 3 is a schematic diagram illustrating the present invention, highlighting the drum compartment and the traction compartment;

[0027] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0028] Figure 5 yes Figure 3 An enlarged schematic diagram of part B;

[0029] Figure 6 It is a cross-sectional schematic diagram highlighting the electromagnet of the present invention;

[0030] Figure 7 is a schematic cross-sectional view highlighting the interior of the mounting roller of the present invention;

[0031] Figure 8 yes Figure 7 A magnified schematic diagram of part C;

[0032] Figure 9 yes Figure 7 An enlarged schematic diagram of part D in the middle;

[0033] Figure 10It is a structural schematic diagram of the present invention highlighting the roller component.

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1. Machine base; 2. Pressing roller assembly; 3. Ultrasonic cutting blade; 4. Cross plate; 5. Main rod; 6. Mounting roller; 7. Pressing roller; 8. Reel compartment; 9. Traction compartment; 10. Second through hole; 11. Tooth; 12. Third motor; 13. Toothed disc; 14. Rotating hole; 15. First through hole; 16. Expanding hole; 17. Tensioning spring; 18. Positioning plate; 19. Positioning slot plate; 20. Inclined surface; 21. Positioning slot; 22. Material storage chamber; 23. First drive assembly; 231. First motor; 232. First lead screw; 233. Push plate; 24. Drive chamber; 25. Partition; 26. Connecting rod; 27. Rod slot; 28. U-shaped plate; 29. Slide; 30. First spring; 31. Second drive assembly; 311 , second motor; 312, second lead screw; 313, connecting plate; 314, electromagnet; 32, connecting plate groove; 33, roller component; 331, pressure wheel part; 332, meshing part; 34, rotating shaft; 35, one-way bearing; 36, meshing rod; 37, partial gear unit; 38, side plate; 39, second spring; 40, screw; 41, hinged rod; 42, bushing; 43, hollow groove; 44, plate groove; 45, linkage rod; 46, linkage shaft; 47, socket; 48, spiral groove; 49, guide shaft; 50, entrance groove; 51, magnetic part; 52, torsion spring; 53, linkage rod groove; 54, protrusion; 55, protruding rod; 56, limit plate; 57, limit groove; 58, third spring; 59, linkage plate. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] See also Figure 1-10 , the present invention provides a technical solution:

[0038] See Figure 2, a sterile packaging film preparation device for medical devices, including a machine base 1, a pressure wheel group 2 slidably arranged on the front side of the machine base 1 and an ultrasonic cutting knife 3 slidably arranged on the machine base 1. A cross plate 4 is rotatably provided on the inner side of the machine base 1, and a main rod 5 is provided in the middle of the cross plate 4. The main rod 5 is rotatably provided on the frame. The rotation of the main rod 5 can drive the cross plate 4 to rotate. The rotation method of the main rod 5 is the existing technology. The cross plates 4 are symmetrically arranged on both sides of the machine base 1 and a film winding roller assembly is provided between the cross plates 4 on both sides. The film winding roller assembly includes a pressure roller 7 and The mounting rollers 6 are symmetrically arranged with two groups of mounting rollers 6 and two groups of pressing rollers 7 on the cross plate 4. The pressing rollers 7 are used to provide a pressing force on the packaging film during the process of winding the packaging film on the reel. The pressing rollers 7 are arranged adjacent to the mounting rollers 6. When a group of mounting rollers 6 has finished winding the packaging film, the ultrasonic cutting knife 3 will move horizontally to cut the packaging film, and then move the pressing wheel group 2 toward the side of the mounting roller 6. Under the fitting rotation of the pressing wheel group 2 and the mounting roller 6, the packaging film will be completely fitted on the reel. The above is the existing technology, so it will not be elaborated on.

[0039] See Figure 2 、 3 The machine base 1 is provided with a reel cabin 8 on the outer wall of one side of the pressure roller 7 assembly, and a traction cabin 9 is provided on the outer wall of the other side of the pressure roller 7 assembly. The rotation of the cross plate 4 can drive the installation roller 6 to switch between the winding position and the unwinding position. Among them, the installation roller 6 is located in the winding position to rotate and wind the installation film in the following way: the installation roller 6 is rotatably arranged on the cross plate 4, and a tooth portion 11 is provided on the side of the circumferential outer wall of the installation roller 6 close to the second through hole 10. A third motor 12 is provided on the cross plate 4 on the side close to the second through hole 10, and the output end of the third motor 12 extends into the cross plate 4 and is connected to a gear disk 13 meshing with the tooth portion 11. It should be noted that: the end face of the cross plate 4 on one side close to the second through hole 10 is provided with a rotating area for the gear disk 13 and the tooth portion 11 to rotate, and the side of the rotating area away from the second through hole 10 is provided with a rotating hole 14 for the installation roller 6 to rotate. The inner wall of the rotating hole 14 is fitted with the outer wall of the installation roller 6, and the installation roller 6 can also slide axially in the rotating hole 14.

[0040] See Figure 2 、 38. The frame is provided with a first through hole 15 between the roll cabin 8 and the pressure roller 7 assembly. When the mounting roller 6 is in the unloading position, the first through hole 15 and a group of mounting rollers 6 are in a coaxial position. A first driving assembly 23 is provided in the roll cabin 8 for driving the unwound film roll to slide from the first through hole 15 to the mounting roller 6. A reaming hole 16 is provided at the cross plate 4 on one side of the roll cabin 8 for the mounting roller 6 to rotate and connect. The inner diameter of the reaming hole 16 is the same as the outer diameter of the roll, allowing the roll to be removed from the roll cabin 8 and pass through the reaming hole 16, and then slide onto the mounting roller 6. A rotating connector for limiting the mounting roller 6 is provided inside the reaming hole 16, and the rotating connector includes a tensioning spring. 17 and positioning plates 18, multiple groups of positioning plates 18 are arranged along the circumferential side of the reaming hole 16, and a positioning plate 18 groove for the positioning plate 18 to slide radially along the reaming hole 16 is provided on the circumferential inner wall of the reaming hole 16, and a positioning groove 21 for one end of the positioning plate 18 to be clamped into is provided on the circumferential outer wall of the reaming hole 16 of the mounting roller 6, and inclined surfaces 20 are provided on both sides of one end of the positioning plate 18 that is clamped into the positioning groove 21. The reel can be pressed against the inclined surface 20 to make the positioning plate 18 slide into the positioning plate 18 groove and thus slide onto the mounting roller 6. When the mounting roller 6 is winding the packaging film, the positioning plate 18 is clamped into the positioning groove 21 and can also limit the mounting roller 6 to prevent the mounting roller 6 from axial sliding.

[0041] See Figure 2 、 3 , a storage chamber 22 for placing a reel is provided in the reel cabin 8, and the first driving assembly 23 includes a first motor 231, a first screw rod 232 and a push plate 233. A driving chamber 24 is provided at the bottom of the storage chamber 22, and a partition 25 is provided between the storage chamber 22 and the driving chamber 24. The reel located at the bottom of the storage chamber 22 contacts the partition 25 and is coaxially opposite to the first through hole 15. The first motor 231 is arranged in the driving chamber 24 and the output end is fixedly connected to the first screw rod 232. A linkage plate 59 is threadedly sleeved on the first screw rod 232, and the push plate 233 is arranged at the bottom of the storage chamber 22 and is connected to the linkage plate 59. A rod groove 27 is provided on the partition 25 for the horizontal sliding of the connecting rod 26. The first motor 231 drives the first screw rod 232 to rotate and moves the push plate 233 toward one side of the first through hole 15, thereby pushing the reel out of the storage chamber 22 to the mounting roller 6.

[0042] See Figure 2 、 3When the push plate 233 pushes the reel to the outside of the storage chamber 22 and returns to its initial position, the push plate 233 will resist the lower side of the U-shaped plate 28 and push the U-shaped plate 28 into the slide 29, causing a group of reels to fall to the side of the push plate 233.

[0043] See Figure 3 The frame is located between the pressure roller 7 assembly and the traction cabin 9 and is provided with a second through hole 10. The second through hole 10 is coaxially arranged with the first through hole 15. A second drive assembly 31 for pulling the installation roller 6 is provided in the traction cabin 9. After the roll is wound around the packaging film, the second drive assembly 31 pulls the installation roller 6 into the traction cabin 9, causing the roll to separate from the installation roller 6 and fall. It should be noted that: a collection box can be provided below the unloading position of the installation roller 6 (below the installation roller 6 at the unloading position) on the frame, so that the roll that has been wound around the packaging film can fall into the collection box after separating from the installation roller 6.

[0044] See Figure 3 、 5 The second driving assembly 31 includes a second motor 311, a second screw rod 312, a connecting plate 313 and an electromagnet 314. A connecting plate groove 32 for the connecting plate 313 to slide horizontally is provided in the traction cabin 9. The second motor 311 is fixed in the connecting plate groove 32 and the output end is fixedly connected to the second screw rod 312. The second screw rod 312 passes through the connecting plate 313 and forms a threaded connection. The electromagnet 314 is fixed on the connecting plate 313 and is opposite to the second through hole 10 and is used to form a connection with the installation roller 6. When it is necessary to pull the installation roller 6 into the traction cabin 9, the electromagnet 314 is energized. The electromagnet 314 will attract the installation roller 6, and then the second motor 311 drives the second screw rod 312 to rotate, so that the connecting plate moves toward the side away from the second through hole 10, so that the installation roller 6 can be pulled into the traction cabin 9. After the installation roller 6 is pulled into the traction cabin 9, the reel on the installation roller 6 will abut against the inner wall of the frame and fall off the installation roller 6.

[0045] See Figure 2 、 10, multiple groups of roller components 33 are provided on the outer peripheral side of the mounting roller 6. The roller components 33 can rotate in the initial state. The contact between the inner wall of the reel and the roller component 33 can reduce the friction of sliding on the mounting roller 6. A positioning component is provided in the mounting roller 6 to limit the rotation of the roller component after the reel moves and is sleeved on the required position of the mounting roller 6. A reset component is also provided in the mounting roller 6 to restore the roller component to its initial state of rotation.

[0046] See Figure 3 、 7 -10, the roller component 33 includes a pressure wheel portion 331 and an engaging portion 332, the roller component 33 is axially provided with a rotating shaft 34, the outer surface of the rotating shaft 34 is provided with a one-way bearing 35, the outer ring of the one-way bearing 35 is fixed in the mounting roller 6, and the inner ring is sleeved on the rotating shaft 34, the roller component 33 is rotatably connected with the mounting roller 6 through the one-way bearing 35, the positioning assembly includes an engaging rod 36 arranged in the mounting roller 6, the engaging rod 36 is provided with a plurality of groups corresponding to the number of roller components 33 arranged on the same circumferential section of the mounting roller 6, the engaging rod 36 is axially slidably arranged in the mounting roller 6 along the mounting roller 6, each group of engaging rods 36 is provided in the mounting roller 6 corresponding to the plurality of groups of roller components 33 in the same axial direction of the mounting roller 6, the engaging rod 36 is provided with a local tooth unit 37 meshing with the plurality of groups of engaging portions 332, which is closest to the second through hole 10 The local tooth unit 37 on one side is initially engaged with the meshing portion 332 on the side closest to the second through hole 10, and the other local tooth units 37 are initially not engaged with the meshing portion 332. In this way, when the reel slides to the last group of roller components 33 and continues to slide, the rotation of the roller component 33 will drive the meshing rod 36 to move through the meshing of the local tooth units 37. When the meshing rod 36 moves a certain distance, all the local tooth units 37 are engaged with the meshing portions 332 at the corresponding positions. When the meshing rod 36 moves to the far left and cannot move further, all roller components 33 will also be unable to rotate, thereby limiting the reel to the current position. Under the action of the one-way bearing 35, the meshing rod 36 will not move to the other side, so that the reel is stably in the position of winding the packaging film.

[0047] See Figure 3 、 Figure 7-10In order to pull the installation roller 6 into the traction cabin 9 and separate the wound reel from the installation roller 6 when it is needed, a reset assembly is provided. The reset assembly includes a side plate 38, a second spring 39, a screw 40 and a hinged rod 41. The side plates 38 are symmetrically arranged on both sides of the axial direction of the installation roller 6 and are located inside the installation roller 6. The screw 40 passes through the side plates 38 on both sides and forms a rotation connection. The threaded sleeves on both sides of the screw 40 are provided with shaft sleeves 42. The hinged rod 41 is symmetrically arranged on both sides of each group of meshing rods 36 and the end away from the meshing rod 36 is respectively connected to the two opposite sides. The corresponding shaft sleeve 42 is hingedly arranged, a hollow groove 43 is arranged in the middle of the mounting roller 6, and plate grooves 44 for the side plate 38 to slide are arranged at both ends of the hollow groove 43. The second spring 39 is arranged in the groove of the side plate 38 near the first through hole 15 and is used to resist the side plate 38. After the engaging rod 36 moves inward along the installation radius and the local tooth unit 37 is disengaged from the engaging portion 332, the side plate 38 and all the engaging rods 36 are pushed to the right as a whole under the action of the second spring 39, so as to facilitate the next installation of the reel on the mounting roller 6.

[0048] See Figure 3 、 Figure 7-10 , the frame is also provided with a linkage component for driving the screw 40 to rotate, the linkage component includes a linkage rod 45 and a linkage shaft 46, the linkage shaft 46 is rotatably arranged on the side of the installation roller 6 near the second through hole 10, one end of the linkage rod 45 is fixedly connected to the screw 40, and the other end is inserted into the linkage shaft 46 and forms a sliding connection, a linkage rod groove 53 is provided on one side of the linkage shaft 46 for the linkage rod 45 to slide, wherein the linkage rod 45 is non-cylindrical, and the end of the electromagnet 314 near the screw 40 is provided with a socket 47 for the linkage shaft 46 to be inserted, a spiral groove 48 is provided on the outer shaft side of the linkage shaft 46, and a guide shaft 49 is provided inside the socket 47 to cooperate with the spiral groove 48, and the side of the installation roller 6 near the second through hole 10 is provided with an entrance groove 50 for inserting the power supply magnet 314, and a magnetic attraction portion 51 that is magnetically attracted to the electromagnet 314 is provided on the inner wall of the entrance groove 50. A torsion spring 52 is connected between the mounting rollers 6. When the electromagnet 314 is energized, the electromagnet 314 is sucked into the entrance groove 50 by the magnetic attraction part 51. The guide shaft 49 in the electromagnet 314 will slide in the spiral groove 48 and drive the linkage shaft 46 to rotate. The rotation of the linkage shaft 46 will drive the screw 40 to rotate through the linkage rod 45. The rotation of the screw 40 will drive the two side sleeves 42 to move toward the side away from each other, and drive the engaging rod 36 to move along the radial inner side of the mounting roller 6 through the hinge rod 41, so that when the electromagnet 314 pulls the mounting roller 6 into the traction cabin 9, the reel falls off from the mounting roller 6. It should be noted that: some of the roller assemblies are rotatably set on the mounting roller 6 through the one-way bearing 35, and the remaining roller assemblies are directly connected to the mounting roller 6 through the rotating shaft 34 to prevent the reel from falling off the mounting roller 6 when the mounting roller 6 is pulled into the traction cabin 9.

[0049] See Figure 3 、5 , 6, a protrusion 54 is provided on the side of the connecting plate 313 opposite to the second through hole 10, and a protrusion 55 is provided on the protrusion 54, one end of the protrusion 55 is inserted into the electromagnet 314, and the end of the protrusion 55 inserted into the electromagnet 314 is provided with a limit plate 56, and a limit groove 57 for the limit plate 56 to slide horizontally is provided in the electromagnet 314, and a third spring 58 is provided in the limit groove 57. After the installation roller 6 is pulled to the traction cabin 9 and the reel falls off, the installation roller 6 is pushed to the unloading position of the frame by the electromagnet 314, so that the electromagnet When the iron 314 is powered off, the linkage shaft 46 will rotate back under the action of the torsion spring 52, and the spiral groove 48 and the guide shaft 49 will push the electromagnet 314 toward the side of the protrusion 54, so that the electromagnet 314 is separated from the entrance groove 50, so that the installation roller 6 can subsequently move to the coiling position through the cross plate 4. The outer end of the electromagnet 314 can be set to a conical surface, so that the cross plate 4 can be against the outer wall of the electromagnet 314 when it rotates to the unloading position next time, so that the electromagnet 314 can continue to be stuck in the entrance groove 50.

[0050] See Figure 1-10 When the device is in use, the storage cavity 22 of the reel compartment 8 is filled with reels. When a group of mounting rollers 6 are located at the unloading position and need to be inserted with reels, the first motor 231 is started, and the first motor 231 drives the first screw rod 232 to rotate. The rotation of the first screw rod 232 will drive the push plate 233 to move toward one side of the first through hole 15 and push a group of reels out of the first through hole 15. When the reels are pushed out, the upper part of the U-shaped plate 28 pops out under the action of the first spring 30 and resists the upper reel to prevent the reel from falling.

[0051] After the reel passes through the first through hole 15, it will continue to move and will pass through the expanded hole 16. The reel will abut against the inclined surface 20 of the positioning plate 18, which will cause the positioning plate 18 to slide into the groove of the positioning plate 18. Since the other end of the mounting roller 6 cooperates with the rotating hole 14 and will not move axially under the abutment of the electromagnet 314, the reel will slide onto the mounting roller 6 after passing through the positioning plate 18. The reel will continue to slide and will be sleeved on the roller component 33 of the mounting roller 6 and continue to move through the roller component 33. When the reel moves to the last group of roller components 33 and continues to move, the local tooth unit 37 on the meshing rod 36 will mesh with the meshing portion 332. The movement of the reel drives the roller component 33 to rotate, thereby driving the engaging rod 36 to move toward the left. When the reel continues to move on the mounting roller 6 and the engaging rod 36 moves to the leftmost position and cannot move further, the roller component 33 cannot continue to rotate due to the meshing action of the local tooth unit 37 and the engaging portion 332, thereby positioning the reel at the current position (the position of the wound packaging film). Then, the first motor 231 drives the first screw rod 232 to reverse, and moves the push plate 233 toward the side of the U-shaped plate 28, pushing the U-shaped plate 28 into the slide groove 29, so that one of the reels on the upper side of the U-shaped plate 28 falls onto the partition 25.

[0052] After the roll is installed, after the roll on the installation roller 6 at the winding position has finished winding the packaging film, the ultrasonic cutting knife 3 cuts the packaging film, and presses the packaging film on the surface of the roll through the pressure wheel group 2 and rotates so that the head of the packaging film fits. Then, the installation roller 6 at the unloading position and the installation roller 6 at the winding position are driven to switch positions through the rotation of the cross plate 4. When the winding installation roller 6 moves to the unloading position, the second motor 311 is started, and the second motor 311 drives the second screw rod 312 to rotate. The rotation of the second screw rod 312 drives the connecting plate 313 to move. The movement of the connecting plate 313 will drive the electromagnet 314 to move toward one side of the installation roller 6, and the electromagnet 314 is energized. The electromagnet 314 will be magnetically attracted by the magnetic attraction part 51 and enter the inlet groove 50. Under the cooperation of the guide shaft 49 in the electromagnet 314 and the spiral groove 48 on the linkage shaft 46, the linkage shaft 46 will be driven to rotate, and the linkage shaft 46 drives the screw through the linkage rod 45 When the second gear 310 is in the state of rotation and the second gear 311 is in the state of rotation, the second gear 310 is in the state of rotation and the second gear 312 is in the state of rotation.

[0053] When the installation roller 6 is located at the unloading position again, the electromagnet 314 is powered off. Under the action of the torsion spring 52, the linkage shaft 46 will reverse and push the electromagnet 314 out of the entrance groove 50 through the cooperation of the guide shaft 49 and the spiral groove 48, so that the cross plate 4 can drive the installation roller 6 at the unloading position to move to the coiling position.

[0054] See Figure 1 A process for preparing a sterile packaging film for medical devices comprises the following steps:

[0055] Step 1: The corona layer, the middle layer and the easy-peel layer are put into a three-layer co-extrusion cast film machine to obtain a three-layer composite film material;

[0056] Step 2: The three-layer composite film is subjected to thickness measurement, corona treatment, winding, plasticization, and slitting to obtain a packaging film for medical packaging. When the film is wound and the roll is replaced, the sterile packaging film preparation device for medical devices is used to replace the roll with a new one.

[0057] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preparing aseptic packaging film for medical devices, comprising a machine base (1), a pressure wheel group (2) slidably arranged on the front side of the machine base (1), and an ultrasonic cutting knife (3) slidably arranged on the machine base (1) to the left and right, a cross plate (4) rotatably provided inside the machine base (1), the cross plates (4) are symmetrically arranged on both sides of the machine base (1), and a film winding roller assembly is provided between the cross plates (4) on both sides, characterized in that: The film winding roller assembly includes a pressure roller (7) and an installation roller (6), the machine base (1) is provided with a reel cabin (8) on the outer wall of one side of the pressure roller (7) assembly, and a traction cabin (9) is provided on the outer wall of the other side of the pressure roller (7) assembly. The cross plate (4) rotates to drive the installation roller (6) to switch between the winding position and the unwinding position. The frame is provided with a first through hole (15) between the reel cabin (8) and the pressure roller (7) assembly. When the installation roller (6) is in the unwinding position, the first through hole (15) and a group of installation rollers (6) are in a coaxial position. The frame is located between the pressure roller (7) assembly and the traction cabin (9 ) is provided with a second through hole (10), the second through hole (10) is coaxially arranged with the first through hole (15), a first driving component (23) is provided in the reel cabin (8) for driving the reel of the unwound film to slide from the first through hole (15) to the mounting roller (6), an expansion hole (16) is provided at the cross plate (4) on one side of the reel cabin (8) for the rotation connection of the mounting roller (6), a rotation connection member for the mounting roller (6) for limiting the position is provided inside the expansion hole (16), and a second driving component (31) for pulling the mounting roller (6) is provided in the traction cabin (9); The outer peripheral side of the mounting roller (6) is provided with a plurality of roller components (33), the mounting roller (6) is provided with a positioning assembly for limiting the rotation of the roller assembly after the reel is moved and sleeved on the mounting roller (6) at a required position, and the mounting roller (6) is also provided with a reset assembly for restoring the roller assembly to an initial state of rotation; The roller component (33) includes a pressure wheel portion (331) and an engaging portion (332). The roller component (33) is axially provided with a rotating shaft (34). The rotating shaft (34) is provided with a one-way bearing (35) on the outside. The outer ring of the one-way bearing (35) is fixed in the installation roller (6), and the inner ring is sleeved on the rotating shaft (34). The roller component (33) is rotatably connected with the installation roller (6) through the one-way bearing (35). The positioning component includes an engaging rod (36) provided in the installation roller (6). The engaging rod (36) is provided with a plurality of roller components (33) provided on the same circumferential section of the installation roller (6). The meshing rod (36) is axially slidably arranged in the mounting roller (6), and each group of meshing rods (36) corresponds to a plurality of groups of roller components (33) arranged in the mounting roller (6) in the same axial direction of the mounting roller (6). The meshing rod (36) is provided with a local tooth unit (37) meshed with the plurality of groups of meshing portions (332). The local tooth unit (37) closest to the second through hole (10) is meshed with the meshing portion (332) closest to the second through hole (10) in an initial state, and the other local tooth units (37) are not meshed with the meshing portion (332) in an initial state. The reset assembly includes a side plate (38), a second spring (39), a screw (40) and a hinged rod (41), wherein the side plates (38) are symmetrically arranged on both sides of the axial direction of the mounting roller (6) and are located inside the mounting roller (6), the screw (40) passes through the side plates (38) on both sides and forms a rotation connection, the threaded sleeves on both sides of the screw (40) are provided with shaft sleeves (42), the hinged rod (41) is symmetrically arranged on both sides of each group of meshing rods (36) and one end away from the meshing rods (36) is respectively hinged to the shaft sleeves (42) corresponding to the two sides, a hollow groove (43) is provided in the middle of the mounting roller (6), and plate grooves (44) for the side plates (38) to slide are provided at both ends of the hollow groove (43), the second spring (39) is provided in the groove of the side plate (38) near the first through hole (15) and is used to resist the side plate (38), and the frame is also provided with a linkage assembly for driving the screw (40) to rotate.

2. The device for preparing a sterile packaging film for medical devices according to claim 1, characterized in that: The mounting roller (6) is rotatably mounted on the cross plate (4); a tooth portion (11) is provided on a side of the circumferential outer wall of the mounting roller (6) close to the second through hole (10); a third motor (12) is provided on the cross plate (4) close to the second through hole (10); an output end of the third motor (12) extends into the cross plate (4) and is connected to a toothed disc (13) meshing with the tooth portion (11).

3. The device for preparing a sterile packaging film for medical devices according to claim 1, characterized in that: A material storage chamber (22) for placing a reel is provided in the reel cabin (8), a first drive assembly (23) includes a first motor (231), a first screw rod (232) and a push plate (233), a drive chamber (24) is provided at the bottom of the material storage chamber (22), a partition (25) is provided between the material storage chamber (22) and the drive chamber (24), the first motor (231) is provided in the drive chamber (24) and an output end is fixedly connected to the first screw rod (232), a linkage plate (59) is provided on a threaded sleeve of the first screw rod (232), the push plate (233) is provided at the bottom of the material storage chamber (22) and a connecting rod (26) is connected to the linkage plate (59), the partition (25) is provided with a rod groove (27) for the connecting rod (26) to slide horizontally, and a partition assembly is provided on one side of the reel cabin (8) located at the bottom of the material storage chamber (22).

4. The device for preparing a sterile packaging film for medical devices according to claim 3, characterized in that: The partition assembly includes a U-shaped plate (28) and a first spring (30). A slide groove (29) for the U-shaped plate (28) to slide horizontally is provided on the inner wall of the storage chamber (22). One end of the first spring (30) is fixed to the inner wall of the slide groove (29) away from the frame, and the other end is against the U-shaped plate (28). The opening of the first through hole (15) is located at the bottom of the storage bin.

5. The device for preparing a sterile packaging film for medical devices according to claim 1, characterized in that: The second drive assembly (31) includes a second motor (311), a second screw rod (312), a connecting plate (313) and an electromagnet (314). A connecting plate groove (32) for the connecting plate (313) to slide horizontally is provided in the traction cabin (9). The second motor (311) is fixed in the connecting plate groove (32) and the output end is fixedly connected to the second screw rod (312). The second screw rod (312) passes through the connecting plate (313) and forms a threaded connection. The electromagnet (314) is fixed on the connecting plate (313) and is opposite to the second through hole (10). The electromagnet (314) is used to form a connection with the mounting roller (6).

6. The device for preparing a sterile packaging film for medical devices according to claim 5, characterized in that: The linkage assembly includes a linkage rod (45) and a linkage shaft (46). The linkage shaft (46) is rotatably arranged on a side of the installation roller (6) close to the second through hole (10). One end of the linkage rod (45) is fixedly connected to the screw rod (40), and the other end of the linkage rod (45) is inserted into the linkage shaft (46) to form a sliding connection. The end of the electromagnet (314) close to the screw rod (40) is provided with a socket (47) for inserting the linkage shaft (46). The outer shaft side of the linkage shaft (46) is provided with a spiral groove (48). The inside of the socket (47) is provided with a guide shaft (49) that matches the spiral groove (48). The side of the installation roller (6) close to the second through hole (10) is provided with an entrance groove (50) for inserting the power supply magnet (314). The inner wall of the entrance groove (50) is provided with a magnetic attraction portion (51) that is magnetically attracted to the electromagnet (314). A torsion spring (52) is connected between the linkage shaft (46) and the installation roller (6).

7. The device for preparing a sterile packaging film for medical devices according to claim 6, characterized in that: A protrusion (54) is provided on a side of the connecting plate (313) opposite to the second through hole (10), and a protrusion rod (55) is provided on the protrusion (54). One end of the protrusion rod (55) is inserted into the electromagnet (314), and a limiting plate (56) is provided on the end of the protrusion rod (55) inserted into the electromagnet (314). A limiting groove (57) for the limiting plate (56) to slide horizontally is provided in the electromagnet (314).

8. A process for preparing a sterile packaging film for medical devices, using the sterile packaging film preparation device for medical devices according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The corona layer, the middle layer and the easy-peel layer are put into a three-layer co-extrusion cast film machine to obtain a three-layer composite film material; Step 2: The three-layer composite film is subjected to thickness measurement, corona treatment, winding, plasticization, and slitting to obtain a packaging film for medical packaging, wherein the film is wound and the roll is replaced using the sterile packaging film preparation device for medical devices according to any one of claims 1 to 7.

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