Automatic butt joint and roll changing device for PVC coiled material for solid preparation production
The automatic docking device enables seamless docking of PVC rolls, solving the downtime problem during PVC roll replacement in existing technologies, improving production efficiency and quality, and ensuring the continuous operation of the aluminum-plastic blister packaging production line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- REYOUNG PHARMA CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, replacing PVC rolls requires stopping the machine for connection, resulting in poor production continuity, low efficiency, and difficulty in ensuring connection accuracy, which affects production quality and equipment lifespan.
An automatic docking and roll-changing device for PVC rolls used in solid dosage form production was designed. The device uses a photoelectric sensor to detect the mark at the end of the roll and triggers an automatic docking mechanism. A servo motor drives the drive rollers to rotate in opposite directions to achieve automatic bonding of the beginning and end of the roll. Pressure is applied by a pressure plate to ensure the bonding quality.
It enables seamless automatic docking of PVC rolls, improving production continuity and docking efficiency, ensuring the flat transport of PVC film, and reducing equipment wear and energy consumption.
Smart Images
Figure CN224493093U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pharmaceutical production packaging equipment technology, specifically an automatic docking and changing device for PVC rolls used in solid dosage form production. Background Technology
[0002] In solid dosage form production, specifically in aluminum-plastic blister packaging production lines, PVC rolls serve as a crucial material, providing continuous substrate support for blister forming and sealing. After being softened by heat, the PVC film forms transparent blister recesses under negative or positive pressure to accommodate pharmaceuticals, capsules, and other products. In subsequent processes, it is heat-sealed with aluminum foil to ensure the barrier properties and product protection performance of the packaging.
[0003] However, in actual production, when a roll of PVC material is used up, the production line must be stopped, and operators must manually tape the end of the used PVC roll to the beginning of the spare roll. This traditional method has a significant efficiency bottleneck:
[0004] First, downtime for docking severely impacts production continuity, leading to capacity loss and an inability to meet the production demands of high-speed production lines. Second, manual operation is slow, and docking accuracy is difficult to guarantee, potentially affecting subsequent blister forming and sealing quality. Furthermore, frequent shutdowns and restarts increase equipment wear and energy consumption, further reducing overall production efficiency. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an automatic docking and changing device for PVC rolls used in solid dosage form production, so as to reduce downtime, improve docking efficiency, and ultimately realize the continuous operation of the entire aluminum-plastic blister packaging production line.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0007] An automatic docking and changing device for PVC rolls used in solid dosage form production includes a support plate, on which a first support shaft and a second support shaft are respectively connected. Both the first support shaft and the second support shaft are used to connect PVC rolls. An automatic docking mechanism is also connected to the support plate.
[0008] The automatic docking mechanism includes a mounting plate with a cavity in the middle. Two drive rollers are rotatably connected inside the cavity. One of the drive rollers is connected to a servo motor. The two drive rollers rotate in opposite directions through a transmission mechanism. A pressing mechanism is rotatably connected inside the cavity. The pressing mechanism includes a pressure plate that can move linearly above the gap between the two drive rollers. Two photoelectric sensors are respectively set on the upper surface of the mounting plate and are respectively set on both sides of the cavity.
[0009] The support plate is rotatably connected to a first guide shaft, a second guide shaft, and multiple third guide shafts. The first guide shaft and the second guide shaft are respectively located on both sides of the mounting plate, and the multiple third guide shafts are located at the bottom of the mounting plate.
[0010] In the above structure, the PVC roll material in normal operation is guided by the first guide shaft or the second guide shaft, enters between the two drive rollers, passes through the two drive rollers downwards, and is guided by the third guide shaft to provide PVC film for the aluminum-plastic blister packaging production line.
[0011] A tail mark is set at the end of the PVC roll. Before the running PVC roll is used up, the photoelectric sensor detects the tail mark, which triggers the automatic docking mechanism to start. The servo motor rotates at a constant speed, and the two drive rollers start to rotate towards each other. At this time, the end of the spare PVC roll has already been coated with adhesive or tape and laid on the upper surface of one of the drive rollers. The two drive rollers rotate towards each other, so that the tail of the PVC roll and the head of the spare PVC roll move downwards at the same time, and then come closer to each other and bond together. At the same time, the operator operates the pressure plate to press down on the gap between the two drive rollers. On the one hand, it forces the spare PVC roll downwards and moves with the drive roller to prevent it from slipping relative to the drive roller. On the other hand, it applies a certain pressure to the bonding position of the tail of the PVC roll and the head of the spare PVC roll, so that the two are firmly bonded, thereby further ensuring the bonding quality and effect.
[0012] The upper surface of the mounting plate is provided with two sets of guiding mechanisms, which are respectively located on both sides of the cavity. The guiding mechanism includes two U-shaped plates arranged opposite each other. The U-shaped plates are horizontally arranged and form a horizontal guide slide, allowing the PVC film to slide along the upper surface of the mounting plate. The guiding mechanism also includes an auxiliary shaft, which is rotatably connected to the mounting plate and located at the end of the mounting plate to further guide the PVC film.
[0013] The upper surface of the mounting plate is provided with two sets of flattening mechanisms, which are respectively located on both sides of the cavity. Each flattening mechanism includes two support blocks, and a mounting shaft is rotatably connected between the two support blocks. A torsion spring is provided between the mounting shaft and the support blocks, and a pressing plate is fixedly connected to the mounting shaft. The torsion spring enables the pressing plate to be pressed tightly against the upper surface of the mounting plate. The pressing plate is inclined relative to the mounting plate and is inclined towards the cavity. The flattening mechanism can ensure the flatness of the PVC film.
[0014] The pressing mechanism includes two rotating rods, which are respectively rotatably disposed at both ends inside the cavity. An operating plate is fixedly connected between the two rotating rods. The pressing plate is disposed at the lower part of the operating plate and is slidably connected to the operating plate.
[0015] The operating panel has a hollow structure, and a driving mechanism is slidably connected inside the operating panel. The driving mechanism includes a driving plate, and two trapezoidal blocks are connected to the lower part of the driving plate. Two sliding rods are fixedly connected to the top of the pressure plate. The two sliding rods slide through the operating panel and fit against the inclined surface of the lower part of the trapezoidal blocks. The driving plate is connected to the driving rod, and the driving rod slides horizontally through the operating panel.
[0016] An auxiliary block is provided inside the control panel. A return rod is slidably connected to the auxiliary block. The return rod is connected to the auxiliary block by a spring. The top of the return rod is in contact with the inclined surface of the lower part of the trapezoidal block.
[0017] The transmission mechanism includes two meshing gears, which are fixedly connected to one end of the drive roller.
[0018] The lower part of the support plate is fixed to the base plate, and the lower part of the base plate is provided with support legs.
[0019] The beneficial effects achieved by this utility model are:
[0020] This invention features a high level of automation and intelligence, enabling automatic docking of two PVC rolls without stopping the machine at either end, thus achieving continuous online production.
[0021] This utility model has a simple structure and reasonable design, and can ensure the smooth and flat transportation of PVC film while achieving uninterrupted production. Attached Figure Description
[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;
[0024] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;
[0025] Figure 3 This is a front view of the present invention;
[0026] Figure 4 This is a left-side view of the present invention;
[0027] Figure 5 This is a schematic diagram of the utility model. Figure 3 ;
[0028] Figure 6 yes Figure 5 Enlarged view of the structure at point A in the middle.
[0029] In the diagram: 1. First support shaft; 2. Second support shaft; 3. Support plate; 4. PVC roll; 5. First guide shaft; 6. Second guide shaft; 7. Third guide shaft; 8. Mounting plate; 9. Operation plate; 10. U-shaped plate; 11. Auxiliary shaft; 12. Drive roller; 13. Press plate; 14. Base plate; 15. Photoelectric sensor; 16. Mounting shaft; 17. Support block; 18. Gear; 19. Drive rod; 20. Press plate; 21. Trapezoidal block; 22. Sliding rod; 23. Auxiliary block; 24. Return rod; 25. Servo motor; 26. Rotating rod. Detailed Implementation
[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0031] Example:
[0032] like Figures 1-6 As shown, an automatic PVC roll changing device for solid dosage form production includes a support plate 3. A first support shaft 1 and a second support shaft 2 are respectively connected to the support plate 3. Both the first support shaft 1 and the second support shaft 2 are used to connect PVC rolls 4. One PVC roll 4 is used in conjunction with the production line, while the other PVC roll 4 is used as a spare. They are changed alternately in this way.
[0033] An automatic docking mechanism is also connected to the support plate 3. The automatic docking mechanism includes a mounting plate 8, which is horizontally positioned and has a cavity in the middle. Two drive rollers 12 are rotatably connected inside the cavity. One of the drive rollers 12 is connected to a servo motor 25, which is located on the back of the support plate 3. The two drive rollers 12 rotate in opposite directions through a transmission mechanism, which includes two meshing gears 18, each fixedly connected to one end of the two drive rollers 12. A pressing mechanism is rotatably connected inside the cavity. The pressing mechanism includes a pressure plate 20, which can move linearly above the gap between the two drive rollers 12. Two photoelectric sensors 15 are respectively provided on the upper surface of the mounting plate 8, located on both sides of the cavity and at a distance from the cavity.
[0034] The support plate 3 is rotatably connected to a first guide shaft 5, a second guide shaft 6 and a plurality of third guide shafts 7. The first guide shaft 5 and the second guide shaft 6 are respectively arranged on both sides of the mounting plate 8, and the plurality of third guide shafts 7 are arranged at the lower part of the mounting plate 8.
[0035] In the above structure, if the PVC roll 4 on the left is running in conjunction with the production line, its PVC film is guided by the first guide shaft 5 and the guide mechanism on the upper surface of the mounting plate 8, enters between the two drive rollers 12, passes through the gap between the two drive rollers 12 and goes down, and is guided by the third guide shaft 7 to provide PVC film for the aluminum-plastic blister packaging production line. At this time, the PVC roll 4 on the right has been installed, and its end has been coated with adhesive or tape, and has been laid on the upper surface of the right drive roller 12.
[0036] Additionally, it should be noted that during the production of PVC roll 4, a tail mark will be set at its end. Since PVC film is transparent, a black opaque mark is set at its end, which can be identified by photoelectric sensor 15. Specifically, photoelectric sensor 15 can be a diffuse reflective photoelectric switch. The detection head of the diffuse reflective photoelectric switch is equipped with a light emitter and a light receiver. Under normal circumstances, the light emitted by the light emitter passes directly through the PVC film and cannot be reflected. When the tail mark passes through, it blocks the light and reflects part of the light back. The light receiver receives the light signal and outputs a switch signal.
[0037] Just before the PVC roll 4 on the left is used up, the photoelectric sensor 15 detects the tail mark and triggers the automatic docking mechanism to start. This causes the servo motor 25 to rotate at a constant speed, and the two drive rollers 12 to start rotating towards each other. At this time, the end of the spare PVC roll 4 has already been coated with adhesive or tape and laid on the upper surface of one of the drive rollers 12. The two drive rollers 12 rotate towards each other, causing the tail of the PVC roll 4 and the head of the spare PVC roll 4 to move downwards simultaneously and then come closer together to bond. At the same time, the operator operates the pressure plate 20 to press down in the gap between the two drive rollers 12. On the one hand, this forces the spare PVC roll 4 downwards, making it move with the drive roller 12 and preventing it from slipping relative to the drive roller 12. On the other hand, it applies a certain pressure to the bonding position between the tail of the PVC roll 4 and the head of the spare PVC roll 4, making the two bond firmly, thereby further ensuring the bonding quality and effect.
[0038] Specifically, such as Figure 5 , Figure 6 As shown, the pressing mechanism includes two rotating rods 26, which are respectively rotatably disposed at both ends inside the cavity. An operating plate 9 is fixedly connected between the two rotating rods 26. The pressing plate 20 is disposed at the lower part of the operating plate 9 and is slidably connected to the operating plate 9.
[0039] The operating plate 9 has a hollow structure, and a driving mechanism is slidably connected inside the operating plate 9. The driving mechanism includes a driving plate, and two trapezoidal blocks 21 are connected to the lower part of the driving plate. Two sliding rods 22 are fixedly connected to the top of the pressure plate 20. The two sliding rods 22 slide through the operating plate 9 and are in contact with the inclined surface of the lower part of the trapezoidal blocks 21. The driving plate is connected to a driving rod 19, which slides horizontally through the operating plate 9. An auxiliary block 23 is provided inside the operating plate 9. A return rod 24 is slidably connected to the auxiliary block 23. The return rod 24 is connected to the auxiliary block 23 by a spring, and the top of the return rod 24 is in contact with the inclined surface of the lower part of the trapezoidal block 21.
[0040] When the operator operates the pressure plate 20, they only need to pull the drive rod 19 to make it slide horizontally relative to the operating plate 9. The drive rod 19 moves horizontally, driving the drive plate to move. The two trapezoidal blocks 21 on the drive plate move synchronously. The inclined surface of the trapezoidal block 21 presses against the sliding rod 22, causing the sliding rod 22 to move downward relative to the operating plate 9, thereby causing the pressure plate 20 to move downward. At this time, the operator can adjust the angle of the rotating rod 26 as appropriate to make the pressure plate 20 impact and press the two PVC rolls 4 at the junction of their ends, thereby further ensuring that the ends are firmly joined.
[0041] The photoelectric sensor 15 can also trigger a system alarm, thereby alerting staff.
[0042] The upper surface of the mounting plate 8 is provided with two sets of guiding mechanisms, which are respectively arranged on both sides of the cavity. The guiding mechanism includes two U-shaped plates 10 arranged opposite each other with their openings facing each other and the U-shaped plates 10 being horizontally arranged. The two U-shaped plates 10 form a horizontal guide slide, allowing the PVC film to slide along the upper surface of the mounting plate 8. The guiding mechanism also includes an auxiliary shaft 11, which is rotatably connected to the mounting plate 8 and is located at the end of the mounting plate 8 to further guide the PVC film.
[0043] The upper surface of the mounting plate 8 is provided with two sets of flattening mechanisms, which are respectively located on both sides of the cavity. The flattening mechanism includes two support blocks 17, and a mounting shaft 16 is rotatably connected between the two support blocks 17. A torsion spring is provided between the mounting shaft 16 and the support blocks 17. A pressing plate 13 is fixedly connected to the mounting shaft 16. The torsion spring can make the pressing plate 13 adhere tightly to the upper surface of the mounting plate 8. The pressing plate 13 is inclined relative to the mounting plate 8 and is inclined towards the cavity. The flattening mechanism can ensure the flatness of the PVC film.
[0044] The support plate 3 is vertically arranged, and its lower part is fixed on the base plate 14. The base plate 14 is provided with support legs at its lower part.
Claims
1. An automatic roll-changing device for PVC rolls used in solid dosage form production, characterized in that, It includes a support plate (3), on which a first support shaft (1) and a second support shaft (2) are respectively connected, and an automatic docking mechanism is also connected to the support plate (3); The automatic docking mechanism includes a mounting plate (8), which has a cavity in the middle. Two drive rollers (12) are rotatably connected inside the cavity. One of the drive rollers (12) is connected to a servo motor (25). The two drive rollers (12) rotate in opposite directions through a transmission mechanism. A pressing mechanism is rotatably connected inside the cavity. The pressing mechanism includes a pressing plate (20). The pressing plate (20) can move linearly in the upper part of the gap between the two drive rollers (12). Two photoelectric sensors (15) are respectively provided on the upper surface of the mounting plate (8). The two photoelectric sensors (15) are respectively provided on both sides of the cavity. The support plate (3) is rotatably connected to a first guide shaft (5), a second guide shaft (6) and a plurality of third guide shafts (7). The first guide shaft (5) and the second guide shaft (6) are respectively located on both sides of the mounting plate (8), and the plurality of third guide shafts (7) are located at the lower part of the mounting plate (8).
2. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 1, characterized in that, The upper surface of the mounting plate (8) is provided with two sets of guide mechanisms. The two sets of guide mechanisms are respectively set on both sides of the cavity. The guide mechanism includes two U-shaped plates (10) arranged opposite each other. The U-shaped plates (10) are horizontally arranged. The guide mechanism also includes an auxiliary shaft (11). The auxiliary shaft (11) is rotatably connected to the mounting plate (8) and is set at the end position of the mounting plate (8).
3. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 1, characterized in that, The upper surface of the mounting plate (8) is provided with two sets of flattening mechanisms. The two sets of flattening mechanisms are respectively set on both sides of the cavity. The flattening mechanism includes two support blocks (17). The two support blocks (17) are rotatably connected to the mounting shaft (16). A torsion spring is provided between the mounting shaft (16) and the support block (17). A pressure plate (13) is fixedly connected to the mounting shaft (16). The pressure plate (13) is inclined relative to the mounting plate (8) and the pressure plate (13) is inclined toward the cavity.
4. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 1, characterized in that, The pressing mechanism includes two rotating rods (26), which are respectively rotatably disposed at both ends inside the cavity. An operating plate (9) is fixedly connected between the two rotating rods (26). The pressing plate (20) is disposed at the lower part of the operating plate (9) and is slidably connected to the operating plate (9).
5. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 4, characterized in that, The operating plate (9) is a hollow structure. A driving mechanism is slidably connected inside the operating plate (9). The driving mechanism includes a driving plate. Two trapezoidal blocks (21) are connected to the lower part of the driving plate. Two sliding rods (22) are fixedly connected to the top of the pressure plate (20). The two sliding rods (22) slide through the operating plate (9) and fit against the inclined surface of the lower part of the trapezoidal blocks (21). The driving plate is connected to a driving rod (19). The driving rod (19) slides horizontally through the operating plate (9).
6. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 5, characterized in that, An auxiliary block (23) is provided inside the operation panel (9). A return rod (24) is slidably connected to the auxiliary block (23). The return rod (24) and the auxiliary block (23) are connected by a spring. The top of the return rod (24) is in contact with the inclined surface of the lower part of the trapezoidal block (21).
7. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 1, characterized in that, The transmission mechanism includes two meshing gears (18), which are fixedly connected to one end of the drive roller (12).
8. The automatic roll-changing device for PVC rolls used in solid dosage form production according to claim 1, characterized in that, The lower part of the support plate (3) is fixed on the base plate (14), and the lower part of the base plate (14) is provided with support feet.