Anti-sticking mechanism for slitting medical film

Abstract

This invention provides an anti-adhesion mechanism for slitting medical films, including a blocking stacking box. The anti-adhesion mechanism is fixedly installed at the discharge port on one side of the blocking stacking box, and release paper is wound inside the anti-adhesion mechanism. One end of a drive arm fixedly installed on the blocking stacking box is fixedly connected to a drive shaft. The drive shaft is rotatably mounted on two mounting seats, which are fixedly mounted relative to each other on a slitting conveyor. The output end of a drive motor fixedly installed on one of the mounting seats is fixed to one end of the drive shaft. This invention integrates an anti-adhesion mechanism at the discharge port of the blocking stacking box, using a winding roller, a conveying roller, and a cylinder to drive the cutting blade to automatically cover the release paper, preventing film adhesion and improving the image quality pass rate. The anti-adhesion is fully automated, and the position of the blocking stacking box can be adjusted to adapt to the slitting speed. Its U-shaped structure and bending part ensure neat film stacking.

Description

Technical Field

[0001] This utility model belongs to the field of film anti-adhesion technology, and in particular relates to an anti-adhesion mechanism for cutting medical films. Background Technology

[0002] Medical film, as a core carrier for medical imaging diagnosis, is widely used in examinations such as X-ray, ultrasound, and CT. During its production, it needs to be cut into finished products that meet clinical specifications by a slitting machine. The typical working method of the existing medical film slitting process is as follows: After the master roll of film is unwound by the unwinding mechanism, it is precisely conveyed towards the slitting blade by the conveyor rollers of the slitting machine. The film is cut to a preset size as it passes under the slitting blade and then falls onto the conveyor belt downstream of the slitting machine. To achieve batch collection, the conveyor belt is usually equipped with a simple blocking structure (such as a block or baffle). The cut single film is stopped by this blocking structure, and subsequently cut films are stacked on top of the previous film until the stacked quantity reaches a set threshold. Then, the blocking structure is released, and the conveyor belt carries the stacked films to subsequent processes (such as packaging and quality inspection).

[0003] However, the above-mentioned slitting process has significant technical pain points in practical applications, as follows: Medical film substrates are mostly polyester films coated with a photosensitive emulsion layer, an antistatic coating, or a protective layer. After slitting, these coatings are prone to causing adjacent films to stick together tightly due to surface tension, electrostatic adsorption, or environmental humidity. When subsequent processes require separating stacked films, forced separation can easily cause scratches and peeling of the coating, directly affecting image quality. If the adhesion is severe, it may also cause packaging machines to jam, interrupting the production process.

[0004] It requires a specialist to insert the release paper one by one during the film stacking process, which is not only inefficient, but also prone to problems such as misalignment and omission of the release paper during manual operation, increasing the defect rate; at the same time, the high labor cost makes it difficult to adapt to the high-speed production needs of the slitting machine.

[0005] Therefore, it is essential to invent an anti-adhesion mechanism for cutting medical films. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an anti-adhesion mechanism for slitting medical films, including a blocking stacking box, an anti-adhesion mechanism, a discharge port, a drive arm, a drive shaft, a mounting base, and a drive motor. The anti-adhesion mechanism is fixedly installed at the discharge port on one side of the blocking stacking box, and release paper is wound inside the anti-adhesion mechanism. One end of the drive arm fixedly installed on the blocking stacking box is fixedly connected to the drive shaft. The drive shaft is rotatably mounted on two mounting bases, and the two mounting bases are fixedly mounted relative to each other on the slitting conveyor. The output end of the drive motor fixedly installed on the outside of one of the mounting bases is fixed to one end of the drive shaft.

[0007] Preferably, the blocking stacking box is of a 凵-shaped structure, with an opening facing the cutting and discharging end of the slitter, and one side of the blocking stacking box is provided with the discharging port penetrating therethrough for allowing release paper to discharge, and one side of the opening of the blocking stacking box is provided with a bent part folded outward.

[0008] Preferably, the anti-adhesion mechanism fixedly installed outside the blocking stacking box comprises an anti-adhesion box, a winding roller, conveying rollers, an unwinding motor, belt pulleys, a belt, a conveying motor, a cutting knife, an air cylinder and an access cover; the winding roller and two conveying rollers are rotatably installed inside the anti-adhesion box, wherein the winding roller is fixed to the output end of the unwinding motor fixedly installed outside the anti-adhesion box; one end of the conveying roller is fixed to the belt pulley outside the anti-adhesion box, the belt pulleys installed at the ends of the two conveying rollers are assembled with the same belt, and the other end of one of the conveying rollers is fixed to the output end of the conveying motor fixedly installed outside the anti-adhesion box; the cutting knife installed inside the anti-adhesion box is fixed to the output end of the air cylinder fixedly installed outside, and the access cover is installed on the anti-adhesion box through bolts.

[0009] Preferably, the winding roller is rotatably installed at one end inside the anti-adhesion box and is away from the blocking stacking box; release paper is wound on the winding roller through a paper tube, and the winding roller can unwind the release paper towards the discharging port.

[0010] Preferably, the release paper can be guided and conveyed by the two conveying rollers, the two conveying rollers can rotate synchronously and in the same direction, and the cutting knife is located between the two conveying rollers.

[0011] Preferably, the access opening provided on the anti-adhesion box is closed by the fixedly installed access cover, and the winding roller corresponds to the access cover.

[0012] In the utility model, an anti-adhesion mechanism is integrated at the discharging port of the blocking stacking box; medical-grade release paper is stored by the winding roller, the conveying rollers synchronously guide the release paper to convey towards the stacked films, the cutting knife precisely cuts the release paper driven by the air cylinder, so that the release paper exactly covers the upper surface of a single sheet of film. This design blocks the direct contact between adjacent films from the physical level, effectively avoids the adhesion problem caused by coating viscosity and electrostatic adsorption; there is no risk of coating scratching and falling off when the films are split, the qualification rate of image imaging quality is improved, which is much higher than the traditional manual paper placing solution.

[0013] In the anti-adhesion mechanism of the utility model, unwinding (driven by an unwinding motor), conveying (linked by a conveying motor and a pulley), and cutting (driving a cutting knife by an air cylinder) are all automatically controlled, and the position of the blocking stacking box can be adjusted through the driving motor and the driving shaft, so that it can accurately match the cutting speed of the slitting machine, and automatic unwinding, cutting and covering of the isolation paper can be completed without manual intervention.

[0014] In the utility model, the blocking stacking box adopts a "凵"-shaped structure, the opening faces the discharge end of the slitting machine, and the opening side is provided with a bent portion folded outward. The "凵"-shaped structure can form circumferential limit for falling rubber sheets and avoid stacking offset, while the bent portion can guide the rubber sheets to stably fall into the stacking area, ensuring stacking neatness. Description of Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 is a structural schematic diagram of the utility model with the anti-adhesion mechanism not installed.

[0017] Figure 3 is a structural schematic diagram of the anti-adhesion mechanism of the utility model.

[0018] Figure 4 is a partial sectional structural schematic diagram of the anti-adhesion mechanism of the utility model.

[0019] In the drawings: 1: blocking stacking box, 2: anti-adhesion mechanism, 21: anti-adhesion mechanism box, 22: winding roller, 23: conveying roller, 24: unwinding motor, 25: pulley, 26: belt, 27: conveying motor, 28: cutting knife, 29: air cylinder, 20: access cover, 3: discharge outlet, 4: driving arm, 5: driving shaft, 6: mounting seat, 7: driving motor. Detailed Description of Embodiments

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the utility model.

[0021] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0022] As attached Figure 1 To be continued Figure 4 As shown: This utility model provides an anti-adhesion mechanism for slitting medical films, including a blocking stacking box 1, an anti-adhesion mechanism 2, a discharge port 3, a drive arm 4, a drive shaft 5, a mounting base 6, and a drive motor 7. The anti-adhesion mechanism 2 is fixedly installed at the discharge port 3 on one side of the blocking stacking box 1, and the anti-adhesion mechanism 2 has release paper wound inside. One end of the drive arm 4 fixedly installed on the blocking stacking box 1 is fixedly connected to the drive shaft 5. The drive shaft 5 is rotatably installed on two mounting bases 6, and the two mounting bases 6 are fixedly installed relative to each other on the slitting conveyor. The output end of the drive motor 7 fixedly installed on the outside of one of the mounting bases 6 is fixed to one end of the drive shaft 5.

[0023] Furthermore, the blocking stacking box 1 is made of 304 stainless steel and has an overall "U"-shaped groove structure. Its opening end faces the cutting and discharge end of the slitting machine, and the opening width is 5-8mm larger than the maximum width of the medical film to be cut, ensuring that the cut film can fall accurately and without jamming into the blocking stacking box 1. To avoid damage to the coating caused by the edge of the film colliding with the box body when it falls in, the edge of the opening of the blocking stacking box 1 has an integrally formed outward folded part with a bending angle of 15-20°, which can guide the film to slide smoothly into the box along the folded surface. A discharge port 3 is provided through the upper side wall of the blocking stacking box 1 to allow the release of the release paper. The discharge port 3 is a rectangular opening. The blocking stacking box 1 is fixed to the side bracket of the slitting conveyor with hexagonal bolts. The distance between the bottom of the box and the surface of the conveyor belt of the slitting conveyor is controlled at 1-2mm, which does not affect the normal operation of the conveyor belt and ensures the stability of the film when stacked in the box.

[0024] Furthermore, the anti-adhesion mechanism 2 is securely fixed to the outer side wall of the discharge port 3 of the blocking stacking box 1. The anti-adhesion mechanism 2 consists of an anti-adhesion box 21, a take-up roller 22, a conveyor roller 23, an unwinding motor 24, a pulley 25, a belt 26, a conveyor motor 27, a cutting blade 28, a cylinder 29, and a maintenance cover 20. The anti-adhesion box 21 is made of 304 stainless steel and has a rectangular box-shaped structure. Deep groove ball bearings are embedded in the box at the positions corresponding to the shaft ends of the take-up roller 22 and the conveyor roller 23 to provide stable support for the rotation of the rollers. One end of roller 22 is fixedly connected to the output end of unwinding motor 24 on the outside of anti-adhesion housing 21 via a coupling, and the other end is inserted into the inner ring of a deep groove ball bearing on the side wall of the housing. Unwinding motor 24 is a 60 series servo motor, which is fixed to the outer wall of the housing via an L-shaped 304 stainless steel motor bracket and M5 bolts. It can drive the take-up roller 22 to precisely unwind under the control of the PLC control system. There are two conveyor rollers 23, which have the same structure as the take-up roller 22 but are covered with a medical-grade silicone layer. One end of each conveyor roller 23 extends to the outside of the housing and is connected to the synchronous belt via a flat key. The pulleys 25 are fixed, and matching SPZ-type polyurethane synchronous belts 26 are mounted on the two pulleys 25. The other end of one of the conveyor rollers 23 is also connected to the output end of the conveyor motor 27 through a flexible coupling. The conveyor motor 27 is a 120W servo motor of the same model, fixed on the outer wall of the machine box away from the unwinding motor 24, and can drive the two conveyor rollers 23 to rotate synchronously and in the same direction through belt drive. The cutting blade 28 is made of high-speed steel, and the blade body is long and strip-shaped. It is fixed to the blade holder with hexagonal bolts, and the blade holder is threaded to the end of the piston rod of the cylinder 29. Next, the cylinder 29 is a model SC63×50 (working air pressure 0.5-0.7MPa), which is fixed to the outside of the top of the machine box by the cylinder bracket. It can drive the cutting blade 28 to move up and down to cut the release paper. In addition, a polyurethane blade pad is fixed inside the machine box at the position below the cutting blade 28 to prevent damage to the silicone layer of the conveyor roller 23 during cutting. The size of the inspection cover 20 is perfectly matched with the rectangular inspection port opened on one side of the machine box. It is fixed to the edge of the inspection port by hex bolts, which makes it easy to open the inspection cover 20 for component maintenance or replacement of release paper.

[0025] Furthermore, the take-up roller 22 is rotatably installed inside the anti-sticking box 21 at one end away from the blocking stacking box 1. Its two ends are respectively positioned by deep groove ball bearings on the side wall of the anti-sticking box 21. To facilitate the installation and replacement of the release paper, a paper sleeve (made of medical-grade powder-free kraft paper, 0.1mm thick, with an inner diameter that is interference-fitted with the outer diameter of the take-up roller 22) is provided on the outside of the take-up roller 22. The release paper to be used is wound on the outside of the paper sleeve to form a release paper roll. Driven by the unwinding motor 24, the take-up roller 22 rotates clockwise (viewed from the outside of the anti-sticking box 21), unwinding the release paper towards the discharge port 3. After unwinding, the free end of the release paper must first pass through the conveyor roller 23 near the take-up roller 22, then through the conveyor roller 23 away from the take-up roller 22 (the conveyor roller 23 is located above the release paper, cooperating with the inner bottom surface of the anti-sticking box 21 to convey the release paper), and extend to the discharge port 3, ensuring that the release paper can be continuously conveyed into the blocking stacking box 1 when the subsequent conveyor roller 23 starts. At the same time, the unwinding speed of the take-up roller 22 is linked to the cutting speed of the slitting machine through the PLC control system. For example, after the slitting machine cuts a film (with an interval of 1-2 seconds), the take-up roller 22 simultaneously unwinds a release paper of the corresponding length (5-10mm longer than the film length), ensuring the matching of the release paper and the film.

[0026] Furthermore, after the medical-grade isolation paper to be cut is unwound, it will be guided and conveyed by the left and right conveyor rollers 23. Since the two conveyor rollers 23 are synchronously driven by the pulley 25 and the belt 26, and the lower conveyor roller 23 is driven by the conveyor motor 27, the two conveyor rollers 23 can maintain completely synchronous rotation in the same direction (rotation direction towards the discharge port 3, linear speed 0.1-0.2m / s). The clamping force of the surface silicone layer drives the isolation paper to be conveyed smoothly, avoiding wrinkles or deviation of the isolation paper during the conveying process. The cutting blade 28 is located directly above the two conveying rollers 23, with its blade perpendicular to the conveying path of the release paper. When the slitting machine completes the cutting of a film and it falls into the blocking stacking box 1, the PLC control system immediately sends a signal to the cylinder 29. The piston rod of the cylinder 29 extends rapidly (stroke 50mm, time 0.3-0.5 seconds), driving the cutting blade 28 downward to cut the release paper. After the cutting is completed, the piston rod retracts quickly, the cutting blade 28 resets, and the conveying rollers 23 continue to drive the subsequent release paper forward until the next cutting signal is triggered.

[0027] Furthermore, a rectangular inspection port is provided on the side wall of the anti-sticking box 21 away from the blocking stacking box 1. The position of this inspection port corresponds to the installation position of the take-up roller 22, that is, the central axis of the inspection port is on the same horizontal plane as the central axis of the take-up roller 22, and the length of the inspection port is 10-15mm longer than the length of the take-up roller 22, and the width is 5-8mm larger than the outer diameter of the take-up roller 22. This ensures that after the operator opens the inspection cover 20, they can directly remove and install the outer isolation paper roll of the take-up roller 22 from the inspection port. The inspection cover 20 is fixed to the edge of the inspection port with six M4 hex bolts, which ensures a firm connection and avoids deformation of the inspection cover 20 due to over-tightening. The distance between the inner surface of the inspection cover 20 and the end of the take-up roller 22 is 3-5mm, which does not affect the normal rotation of the take-up roller 22, and provides sufficient operating space for the operator's hands or tools during maintenance. When it is necessary to replace the isolation paper roll, the operator only needs to loosen the 6 fixing bolts of the inspection cover 20, remove the inspection cover 20, and then remove the used isolation paper roll (including the paper sleeve) from the take-up roller 22. Then, a new paper sleeve and isolation paper roll are installed. The entire replacement process only takes 3-5 minutes, which greatly improves the maintenance efficiency of the equipment. After maintenance is completed, the inspection cover 20 is replaced and the bolts are tightened to resume production.

[0028] The working principle is as follows: First, after the slitting machine cuts the medical film, the cut film is conveyed towards the blocking stacking box 1 and finally falls into the blocking stacking box 1. The blocking stacking box 1 limits the film through its own structure to prevent the film from shifting during the stacking process.

[0029] Next, when the film begins to stack in the blocking stack box 1, the anti-sticking mechanism 2 starts to work: the unwinding motor 24 in the anti-sticking mechanism 2 runs, driving the take-up roller 22 to rotate, and the release paper wound on the take-up roller 22 is unwound, and the release paper moves toward the discharge port 3 near the blocking stack box 1.

[0030] Then, the unwound release paper enters between the two conveyor rollers 23 of the anti-sticking mechanism 2. The conveyor motor 27 runs and drives the two conveyor rollers 23 to rotate synchronously in the same direction through the transmission action of the pulley 25 and the belt 26. The conveyor rollers 23 guide the release paper smoothly towards the discharge port 3, so that the release paper gradually approaches the stacked film in the blocking stacking box 1.

[0031] After the slitting machine finishes cutting a film and makes it fall into the blocking stacking box 1, the control system sends a signal to the cylinder 29 of the anti-adhesion mechanism 2. The piston rod of the cylinder 29 extends, driving the cutting blade 28 to move downward and cut the release paper that is being conveyed. The cut release paper enters the blocking stacking box 1 through the discharge port 3 and covers the surface of the film that has just fallen in, realizing the physical isolation of adjacent films and preventing the films from sticking together.

[0032] Subsequently, after the release paper is cut, the piston rod of cylinder 29 retracts, driving the cutting blade 28 to reset. At the same time, the conveying roller 23 continues to convey subsequent release papers, waiting for the next cutting signal, to ensure that each sheet of film falling into the blocking stack box 1 is covered with a layer of release paper.

[0033] Finally, when the number of films stacked in the blocking stacking box 1 reaches the set quantity, the drive motor 7 starts, driving the drive shaft 5 to rotate on the two mounting seats 6. When the drive shaft 5 rotates, it drives the drive arm 4 fixed thereto to move. The drive arm 4 then drives the blocking stacking box 1 to adjust its position, releasing the restriction on the stacked films. The conveyor belt of the slitting conveyor then carries the stacked films, each with release paper, to the subsequent process. If maintenance or replacement of the release paper is required for the anti-adhesion mechanism 2, the operator can remove the inspection cover 20 and replace the release paper roll on the take-up roller 22 or maintain the internal components through the inspection port of the anti-adhesion box 21. After maintenance, the inspection cover 20 can be reinstalled to resume operation.

[0034] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A mechanism for preventing adhesion of medical films during slitting, characterized in that, It comprises a blocking stacking box (1), an anti-adhesion mechanism (2), a discharge port (3), a driving arm (4), a driving shaft (5), mounting seats (6) and a driving motor (7). The anti-adhesion mechanism (2) is fixedly installed at the position of the discharge port (3) opened on one side of the blocking stacking box (1), and release paper is wound inside the anti-adhesion mechanism (2); the driving arm (4) fixedly installed on the blocking stacking box (1) has one end fixedly connected to the driving shaft (5), the driving shaft (5) is rotatably installed on the two mounting seats (6), the two mounting seats (6) are relatively and fixedly installed on the slitting conveyor, and the output end of the driving motor (7) fixedly installed outside one of the mounting seats (6) is fixed to one end of the driving shaft (5).

2. The anti-adhesion mechanism for slitting medical films as described in claim 1, characterized in that: The blocking stacking box (1) is of a U-shaped structure, the opening of which faces the cutting discharge end of the slitter, the discharge port (3) allowing the discharge of the release paper is penetratingly opened on the upper part of one side of the blocking stacking box (1), and a bending portion folded outward is provided on the opening side of the blocking stacking box (1).

3. The anti-adhesion mechanism for slitting medical films as described in claim 2, characterized in that: The anti-adhesion mechanism (2) fixedly installed outside the blocking stacking box (1) comprises an anti-adhesion box (21), a winding roller (22), conveying rollers (23), an unwinding motor (24), belt pulleys (25), a belt (26), a conveying motor (27), a cutting knife (28), an air cylinder (29) and an access cover (20). The winding roller (22) and two conveying rollers (23) are rotatably installed inside the anti-adhesion box (21), wherein the winding roller (22) is fixed to the output end of the unwinding motor (24) fixedly installed outside the anti-adhesion box (21); one end of each conveying roller (23) is fixed to the corresponding belt pulley (25) outside the anti-adhesion box (21), the same belt (26) is fitted on the belt pulleys (25) installed at the ends of the two conveying rollers (23), and the other end of one of the conveying rollers (23) is fixed to the output end of the conveying motor (27) fixedly installed outside the anti-adhesion box (21); the cutting knife (28) installed inside the anti-adhesion box (21) is fixed to the output end of the air cylinder (29) fixedly installed outside, and the access cover (20) is installed on the anti-adhesion box (21) through bolts.

4. The anti-adhesion mechanism for slitting medical films as described in claim 3, characterized in that: The winding roller (22) is rotatably installed at one end inside the anti-adhesion box (21) and is away from the blocking stacking box (1), the release paper is wound on the winding roller (22) through a paper tube, and the winding roller (22) can unwind the release paper towards the discharge port (3).

5. The anti-adhesion mechanism for slitting medical films as described in claim 4, characterized in that: The release paper can be guided and conveyed by the two conveying rollers (23), the two conveying rollers (23) can rotate synchronously in the same direction, and the cutting knife (28) is located between the two conveying rollers (23).

6. A mechanism for preventing adhesive blocking of slit medical film as defined in claim 5, wherein: The access opening provided on the anti-adhesion box (21) is closed by the fixedly installed access cover (20), and the winding roller (22) corresponds to the access cover (20).

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