Sealing device of medical packaging machine bag making machine
By introducing a cylinder-driven sliding strip and a buffer assembly into the sealing device of a medical packaging bag making machine, the problems of bag displacement and inconvenient heat sealing strip replacement are solved, and the sealing position is fixed and the heating plate can be easily replaced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN GUANJIANG AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-05-15
AI Technical Summary
The sealing devices of existing medical packaging bag making machines are prone to causing bag displacement and seal position deviation during sealing, and the heat seal is inconvenient to replace, especially when tools are lacking.
A sealing device comprising a cylinder, a sliding strip, a sliding shell, a fixing component, and a buffer component is designed. The cylinder drives the sliding strip to bring the sliding shell into contact with and fix it to the packaging bag. The buffer component smooths out pressure changes, and the fixing component simplifies the replacement process of the heating plate.
This ensures that the packaging bag is fixed in position during sealing, reduces displacement, simplifies the process of replacing the heating plate, and improves operational convenience and sealing efficiency.
Smart Images
Figure CN224241433U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sealing device technology, and in particular relates to a sealing device for a medical packaging bag making machine. Background Technology
[0002] The sealing device of a medical packaging bag making machine is the core component. It mainly achieves sealing of the packaging material through heating, ensuring a firm and airtight seal to prevent microbial intrusion and meet the sterility and protection requirements of medical packaging.
[0003] Existing sealing devices in medical packaging bag making machines have several drawbacks. For example, if the packaging is not secured during sealing, it may shift, causing the seal to deviate and obscuring text and graphics, resulting in incomplete product labeling. Furthermore, the heat seal strip accumulates molten plastic on its surface after prolonged use, requiring replacement. Current heat seal strips are secured with screws, making replacement impossible without tools. Therefore, we propose a sealing device for a medical packaging bag making machine. Utility Model Content
[0004] The purpose of this invention is to provide a sealing device for a medical packaging bag making machine to solve the problems mentioned in the background art.
[0005] In view of this, the present invention provides a sealing device for a medical packaging bag making machine, comprising a housing and a rectangular strip, and further comprising:
[0006] A cylinder is fixedly installed on the top of the housing. The telescopic end of the cylinder passes through the housing and is fixedly installed with a sliding strip. A rectangular strip is fixedly installed inside the housing and located below the sliding strip. A fixing strip is fixedly installed at the bottom of the sliding strip. Two electric heating tubes are fixedly installed inside the fixing strip. A heating plate and a fixing block are inserted and installed inside the fixing strip and below the two electric heating tubes. The heating plate and the fixing block are fixedly connected.
[0007] A sliding shell is sleeved on a fixed strip. Two fixed plates are fixedly installed on the top of the sliding shell. The upper ends of the two fixed plates pass through the sliding strip, and the two fixed plates are slidably connected to the sliding strip.
[0008] A fixing component, located within a fixing strip, is used to fix the position of the fixing block;
[0009] Two sets of buffer components, both of which are located on a fixed plate and are used to buffer the sliding of the heating plate.
[0010] In this technical solution, when sealing a medical packaging bag, the medical packaging bag is first placed on top of the rectangular strip. Then, two electric heating tubes are activated to heat the heating plate. Next, the cylinder is activated, which drives the sliding strip to slide downwards. The sliding strip drives the sliding shell to move downwards, and the bottom of the sliding shell will first contact the medical packaging bag, which can fix the position of the medical packaging bag and ensure that the position of the medical packaging bag will not shift when sealing. As the cylinder continues to move downwards, the sliding strip drives the fixing strip to slide downwards inside the sliding shell. Through the set buffer component, the pressure change of the heating plate is made smoother. Even if the thickness fluctuates, the damping buffer can reduce the instantaneous pressure impact. Finally, the heating plate contacts the medical packaging bag, which can seal the medical packaging bag. Finally, the cylinder drives the sliding strip to move upwards.
[0011] When the heating plate needs to be replaced after long-term use, the fixing block can be pulled and the heating plate can be taken out from the fixing strip by the fixing component. Then, the new heating plate and the fixing block can be inserted into the fixing strip. The fixing block can be fixed in position by the fixing component, which makes it convenient to replace the heating plate and the operation is simple and quick.
[0012] In the above technical solution, the fixing component further includes:
[0013] A limiting groove is formed inside the fixing strip and located at the top of the fixing block. A limiting block is slidably installed inside the limiting groove. The lower end of the limiting block passes through the limiting groove and extends into the fixing block, and the limiting block and the fixing block are inserted into each other.
[0014] Two fixed posts are fixedly installed in the limiting groove. The lower ends of the two fixed posts extend into the limiting block. The two fixed posts are slidably connected to the limiting block. A first spring is sleeved on each of the two fixed posts.
[0015] In this technical solution, when the heating plate needs to be replaced after long-term use, firstly, pull the limiting block upwards. The limiting block compresses the two first springs and retracts. After the lower end of the limiting block disengages from the fixing block, the fixing block can be pulled to remove the heating plate from the fixing strip. Then, insert the new heating plate and the fixing block into the fixing strip. Finally, release the limiting block. Under the rebound force of the two first springs, the limiting block slides downwards and inserts into the fixing block, which can fix the position of the fixing block, making it convenient to replace the heating plate. The operation is simple and quick.
[0016] In the above technical solution, the buffer component further includes:
[0017] A rotating column is disposed between a sliding bar and a sliding shell. Two connecting rods are rotatably mounted on the rotating column. Two sliding grooves are opened in both the sliding bar and the sliding shell. Sliding blocks are slidably mounted in each of the four sliding grooves. The four sliding blocks are rotatably connected to the two connecting rods respectively.
[0018] Two damping rods are provided, each positioned between the sliding bar and the sliding shell. Rectangular blocks are fixedly installed at both ends of each damping rod. The four rectangular blocks are fixedly connected to the four sliding blocks respectively. A second spring is fitted onto each of the two damping rods.
[0019] In this technical solution, when sealing a medical packaging bag, the bag is first placed on top of a rectangular strip. Then, two electric heating elements are activated to heat the heating plate. Next, a cylinder is activated, causing a sliding strip to slide downwards. This sliding strip then moves the sliding shell downwards, with the bottom of the sliding shell initially contacting the medical packaging bag to fix its position and ensure it doesn't shift during sealing. As the cylinder continues to extend downwards, the sliding strip moves the fixing strip downwards within the sliding shell, while simultaneously, all four connecting rods are compressed. The cylinder rotates, and the four connecting rods drive the eight sliding blocks to slide. The eight sliding blocks drive the eight rectangular blocks to move. At the same time, the four damping rods and the four second springs are compressed and contracted. Finally, the heating plate contacts the medical packaging bag and seals it. Then, the cylinder drives the sliding strip to move upward. Under the rebound force of the four second springs, the four damping rods extend and return to their original positions. At the same time, the four connecting rods rotate and reset. The four damping rods can limit the compression speed of the four second springs, making the pressure change smoother. Even with thickness fluctuations, the damping buffer can reduce instantaneous pressure impact.
[0020] In the above technical solution, further, the two ends of the first spring are welded to the inner wall of the limiting block and the limiting groove, respectively, and the two ends of the second spring are welded to the two rectangular blocks, respectively.
[0021] In this technical solution, it is ensured that both the first spring and the second spring can be used stably.
[0022] In the above technical solution, a rubber pad is further fixedly installed at the bottom of the sliding shell.
[0023] In this technical solution, the rubber pad at the bottom of the sliding shell will first come into contact with the medical packaging bag, which can fix the position of the medical packaging bag and ensure that the position of the medical packaging bag will not shift when it is sealed.
[0024] In the above technical solution, the telescopic end of the cylinder is further slidably connected to the housing.
[0025] In this technical solution, it is ensured that the telescopic end of the cylinder can slide within the housing.
[0026] In the above technical solution, the heating plate is further in contact with two electric heating tubes.
[0027] In this technical solution, it is ensured that the electric heating element can heat the heating plate, thus guaranteeing high heating efficiency of the heating plate.
[0028] The beneficial effects of this utility model are:
[0029] 1. The sealing device of this medical packaging bag making machine starts with a cylinder, which drives a sliding strip to slide downwards. The sliding strip causes the sliding shell to move downwards, and the bottom of the sliding shell will first contact the medical packaging bag, which can fix the position of the medical packaging bag and ensure that the position of the medical packaging bag will not shift when sealing. As the cylinder continues to move downwards, the sliding strip drives the fixing strip to slide downwards inside the sliding shell. Through the buffer component, the pressure change of the heating plate is made smoother. Even if the thickness fluctuates, the damping buffer can reduce the instantaneous pressure impact.
[0030] 2. The sealing device of this medical packaging bag-making machine allows for easy replacement of the heating plate after prolonged use. By using a fixed component, the fixed block can be pulled to remove the heating plate from the fixed strip. Then, a new heating plate and the fixed block can be inserted into the fixed strip. The fixed component can fix the position of the fixed block, facilitating the replacement of the heating plate. The operation is simple and quick. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell of this utility model;
[0033] Figure 3 This is a schematic diagram of the fixing strip area structure of this utility model;
[0034] Figure 4 This is the utility model Figure 2 Enlarged structural diagram at point A;
[0035] Figure 5 This is a schematic diagram of the heating plate area structure of this utility model;
[0036] Figure 6 This is one of the schematic diagrams of the cross-sectional structure of the fixing strip of this utility model;
[0037] Figure 7 This is the utility model Figure 6 Enlarged structural diagram at point B;
[0038] Figure 8 This is the second schematic diagram of the cross-sectional structure of the fixing strip of this utility model;
[0039] Figure 9 This is the third schematic diagram of the cross-sectional structure of the fixing strip of this utility model;
[0040] Figure 10 This is a schematic diagram of the fixed block area structure of this utility model.
[0041] The markings in the diagram are as follows:
[0042] 1. Housing; 2. Rectangular bar; 3. Cylinder; 4. Sliding bar; 5. Fixing bar; 6. Sliding shell; 7. Fixing plate; 8. Electric heating element; 9. Heating plate; 10. Fixing block; 11. Rubber pad; 12. Limiting groove; 13. Limiting block; 14. Fixing column; 15. First spring; 16. Sliding groove; 17. Sliding block; 18. Rotating column; 19. Connecting rod; 20. Rectangular block; 21. Damping rod; 22. Second spring. Detailed Implementation
[0043] The following is in conjunction with the appendix Figure 1 - Figure 10 This application will be described in further detail.
[0044] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0045] Example 1: This example provides a sealing device for a medical packaging bag making machine, including a housing 1 and a rectangular strip 2, and further including:
[0046] Cylinder 3 is fixedly installed on the top of housing 1. The telescopic end of cylinder 3 passes through housing 1 and is fixedly installed with sliding strip 4. Rectangular strip 2 is fixedly installed inside housing 1 and located below sliding strip 4. Fixed strip 5 is fixedly installed at the bottom of sliding strip 4. Two electric heating tubes 8 are fixedly installed inside fixed strip 5. Heating plate 9 and fixed block 10 are inserted and installed inside fixed strip 5 and below the two electric heating tubes 8. Heating plate 9 and fixed block 10 are fixedly connected.
[0047] The sliding shell 6 is sleeved on the fixed strip 5. Two fixed plates 7 are fixedly installed on the top of the sliding shell 6. The upper ends of the two fixed plates 7 pass through the sliding strip 4, and the two fixed plates 7 are slidably connected to the sliding strip 4.
[0048] A fixing component is located within the fixing strip 5 and is used to fix the position of the fixing block 10;
[0049] Two sets of buffer components are located on the fixed plate 7 and are used to buffer the sliding of the heating plate 9.
[0050] When sealing the medical packaging bag, the medical packaging bag is first placed on top of the rectangular strip 2. Then, the two electric heating tubes 8 are activated to heat the heating plate 9. Next, the cylinder 3 is activated, which drives the sliding strip 4 to slide downward. The sliding strip 4 drives the sliding shell 6 to move downward. The bottom of the sliding shell 6 will first contact the medical packaging bag, which can fix the position of the medical packaging bag and ensure that the position of the medical packaging bag will not be displaced when sealing. As the extension end of the cylinder 3 continues to move downward, the sliding strip 4 drives the fixing strip 5 to slide downward in the sliding shell 6. Through the set buffer component, the pressure change of the heating plate 9 is made smoother. Even if the thickness fluctuates, the damping buffer can reduce the instantaneous pressure impact. Finally, the heating plate 9 contacts the medical packaging bag and can seal the medical packaging bag. Finally, the cylinder 3 drives the sliding strip 4 to move upward.
[0051] When the heating plate 9 needs to be replaced after long-term use, the fixing block 10 can be pulled by the fixing component to remove the heating plate 9 from the fixing strip 5. Then, the new heating plate 9 and the fixing block 10 can be inserted into the fixing strip 5. The fixing component can fix the position of the fixing block 10, which makes it convenient to replace the heating plate 9 and the operation is simple and quick.
[0052] In this embodiment, the fixing component includes:
[0053] The limiting groove 12 is opened in the fixing strip 5 and located at the top of the fixing block 10. The limiting block 13 is slidably installed in the limiting groove 12. The lower end of the limiting block 13 passes through the limiting groove 12 and extends into the fixing block 10. The limiting block 13 and the fixing block 10 are inserted and engaged.
[0054] Two fixed posts 14 are fixedly installed in the limiting groove 12. The lower ends of the two fixed posts 14 extend into the limiting block 13. The two fixed posts 14 are slidably connected to the limiting block 13. A first spring 15 is sleeved on the two fixed posts 14.
[0055] When the heating plate 9 needs to be replaced after long-term use, first pull the limiting block 13 upwards. The limiting block 13 compresses the two first springs 15 and retracts. After the lower end of the limiting block 13 disengages from the fixing block 10, the fixing block 10 can be pulled to remove the heating plate 9 from the fixing strip 5. Then, insert the new heating plate 9 and the fixing block 10 into the fixing strip 5. Finally, release the limiting block 13. Under the rebound force of the two first springs 15, the limiting block 13 slides downwards and inserts into the fixing block 10, which can fix the position of the fixing block 10, making it convenient to replace the heating plate 9. The operation is simple and quick.
[0056] In this embodiment, the buffer component includes:
[0057] A rotating column 18 is disposed between the sliding bar 4 and the sliding shell 6. Two connecting rods 19 are rotatably mounted on the rotating column 18. Two sliding grooves 16 are opened in both the sliding bar 4 and the sliding shell 6. Sliding blocks 17 are slidably installed in each of the four sliding grooves 16. The four sliding blocks 17 are rotatably connected to the two connecting rods 19 respectively.
[0058] Two damping rods 21 are provided between the sliding bar 4 and the sliding shell 6. Rectangular blocks 20 are fixedly installed at both ends of the two damping rods 21. The four rectangular blocks 20 are fixedly connected to the four sliding blocks 17 respectively. A second spring 22 is sleeved on each of the two damping rods 21.
[0059] When sealing the medical packaging bag, the bag is first placed on top of the rectangular strip 2. Then, two electric heating elements 8 are activated to heat the heating plate 9. Next, cylinder 3 is activated, causing the sliding strip 4 to slide downwards. The sliding strip 4 then moves the sliding shell 6 downwards, with the bottom of the sliding shell 6 initially contacting the medical packaging bag to fix its position and ensure it doesn't shift during sealing. As the cylinder 3 continues to extend downwards, the sliding strip 4 causes the fixing strip 5 to slide downwards within the sliding shell 6. Simultaneously, all four connecting rods 19 are compressed and rotate. Rod 19 drives eight sliding blocks 17 to slide, and the eight sliding blocks 17 drive eight rectangular blocks 20 to move. At the same time, the four damping rods 21 and the four second springs 22 are compressed and contracted. Finally, the heating plate 9 contacts the medical packaging bag and can seal the medical packaging bag. Finally, the cylinder 3 drives the sliding strip 4 to move upward. Under the action of the rebound force of the four second springs 22, the four damping rods 21 extend and return to their original positions. At the same time, the four connecting rods 19 rotate and reset. The four damping rods 21 can limit the compression speed of the four second springs 22, so that the pressure changes more smoothly. Even if the thickness fluctuates, the damping buffer can reduce the instantaneous pressure impact.
[0060] Example 2:
[0061] This embodiment provides a sealing device for a medical packaging bag making machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0062] In this embodiment, the two ends of the first spring 15 are welded to the inner walls of the limiting block 13 and the limiting groove 12, respectively, and the two ends of the second spring 22 are welded to the two rectangular blocks 20, respectively.
[0063] This ensures that both the first spring 15 and the second spring 22 can be used stably.
[0064] Example 3:
[0065] This embodiment provides a sealing device for a medical packaging bag making machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0066] In this embodiment, a rubber pad 11 is fixedly installed at the bottom of the sliding shell 6.
[0067] Among them, the rubber pad 11 at the bottom of the sliding shell 6 will first come into contact with the medical packaging bag, which can fix the position of the medical packaging bag and ensure that the position of the medical packaging bag will not shift when it is sealed.
[0068] Example 4:
[0069] This embodiment provides a sealing device for a medical packaging bag making machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0070] In this embodiment, the telescopic end of the cylinder 3 is slidably connected to the housing 1.
[0071] Specifically, it is ensured that the telescopic end of cylinder 3 can slide within housing 1.
[0072] Example 5:
[0073] This embodiment provides a sealing device for a medical packaging bag making machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0074] In this embodiment, the heating plate 9 is in contact with two electric heating tubes 8.
[0075] Among them, it is ensured that the electric heating tube 8 can heat the heating plate 9, thus ensuring that the heating plate 9 has high heating efficiency.
[0076] It is worth noting that the electric heating tube 8 involved in this utility model is a single-ended heating tube produced by Shenyang Enteng Electric Heating Technology Co., Ltd. The electric heating tube 8 involved in this utility model is existing technology, which can be fully implemented by those skilled in the art, and there is no need to elaborate. The content protected by this utility model does not involve any improvement to the structure and working principle of the electric heating tube 8. The heating temperature of the electric heating tube 8 is 120℃-180℃.
[0077] It is worth noting that the heating plate 9 is made of aluminum alloy, which has excellent thermal conductivity of about 180 to 230 W / (m·K), good temperature uniformity, and can heat up and dissipate heat quickly. After the surface of the heating plate 9 is hard anodized, its wear resistance and corrosion resistance are significantly improved, and it is not easy for plastic melt to stick.
[0078] Working principle: When sealing a medical packaging bag, first place the bag on top of the rectangular strip 2. Then, activate the two electric heating tubes 8 to heat the heating plate 9. Next, activate the cylinder 3, which drives the sliding strip 4 downward. The sliding strip 4 then moves the sliding shell 6 downward. The rubber pad 11 at the bottom of the sliding shell 6 will first contact the medical packaging bag, fixing its position and ensuring it does not shift during sealing. As the cylinder 3 continues to move downward, the sliding strip 4 drives the fixing strip 5 to slide downward within the sliding shell 6. Simultaneously, all four connecting rods 19 are compressed and rotate. The four connecting rods 19 drive the eight sliding blocks 17 to slide, and the eight sliding blocks 17 drive the eight rectangular blocks 20 to move. At the same time, the four damping rods 21 and the four second springs 22 are compressed and contracted. Finally, the heating plate 9 contacts the medical packaging bag and can seal the medical packaging bag. Finally, the cylinder 3 drives the sliding strip 4 to move upward. Under the action of the rebound force of the four second springs 22, the four damping rods 21 extend and return to their original positions. At the same time, the four connecting rods 19 rotate and reset. The four damping rods 21 can limit the compression speed of the four second springs 22, so that the pressure change is smoother. Even if the thickness fluctuates, the damping buffer can reduce the instantaneous pressure impact.
[0079] When the heating plate 9 needs to be replaced after long-term use, first pull the limiting block 13 upwards. The limiting block 13 compresses the two first springs 15 and retracts. After the lower end of the limiting block 13 disengages from the fixing block 10, the fixing block 10 can be pulled to remove the heating plate 9 from the fixing strip 5. Then, insert the new heating plate 9 and the fixing block 10 into the fixing strip 5. Finally, release the limiting block 13. Under the rebound force of the two first springs 15, the limiting block 13 slides downwards and inserts into the fixing block 10, which can fix the position of the fixing block 10, making it convenient to replace the heating plate 9. The operation is simple and quick.
[0080] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A sealing device for a medical packaging bag making machine, comprising a housing (1) and a rectangular strip (2), characterized in that, Also includes: A cylinder (3) is fixedly installed on the top of the housing (1). The telescopic end of the cylinder (3) passes through the housing (1) and is fixedly installed with a sliding strip (4). A rectangular strip (2) is fixedly installed inside the housing (1) and located below the sliding strip (4). A fixing strip (5) is fixedly installed at the bottom of the sliding strip (4). Two electric heating tubes (8) are fixedly installed inside the fixing strip (5). A heating plate (9) and a fixing block (10) are inserted and installed inside the fixing strip (5) and below the two electric heating tubes (8). The heating plate (9) and the fixing block (10) are fixedly connected. A sliding shell (6) is sleeved on a fixing strip (5). Two fixing plates (7) are fixedly installed on the top of the sliding shell (6). The upper ends of the two fixing plates (7) pass through the sliding strip (4), and the two fixing plates (7) are slidably connected to the sliding strip (4). A fixing component, located within the fixing strip (5), is used to fix the position of the fixing block (10); Two sets of buffer components are located on the fixed plate (7) and are used to buffer the sliding of the heating plate (9).
2. The sealing device of a medical packaging bag-making machine according to claim 1, characterized in that, The fixing component includes: A limiting groove (12) is formed in the fixing strip (5) and located at the top of the fixing block (10). A limiting block (13) is slidably installed in the limiting groove (12). The lower end of the limiting block (13) passes through the limiting groove (12) and extends into the fixing block (10). The limiting block (13) and the fixing block (10) are inserted into each other. Two fixed posts (14) are fixedly installed in the limiting groove (12). The lower ends of the two fixed posts (14) extend into the limiting block (13). The two fixed posts (14) are slidably connected to the limiting block (13). A first spring (15) is sleeved on the two fixed posts (14).
3. The sealing device of a medical packaging bag-making machine according to claim 2, characterized in that, The buffer component includes: A rotating column (18) is disposed between the sliding bar (4) and the sliding shell (6). Two connecting rods (19) are rotatably mounted on the rotating column (18). Two sliding grooves (16) are opened in both the sliding bar (4) and the sliding shell (6). Sliding blocks (17) are slidably installed in each of the four sliding grooves (16). The four sliding blocks (17) are rotatably connected to the two connecting rods (19) respectively. Two damping rods (21) are provided between the sliding bar (4) and the sliding shell (6). Rectangular blocks (20) are fixedly installed at both ends of the two damping rods (21). The four rectangular blocks (20) are fixedly connected to the four sliding blocks (17) respectively. A second spring (22) is sleeved on each of the two damping rods (21).
4. The sealing device of a medical packaging bag-making machine according to claim 3, characterized in that, The two ends of the first spring (15) are welded to the inner walls of the limiting block (13) and the limiting groove (12), respectively, and the two ends of the second spring (22) are welded to the two rectangular blocks (20).
5. The sealing device of a medical packaging bag-making machine according to claim 1, characterized in that, A rubber pad (11) is fixedly installed at the bottom of the sliding shell (6).
6. The sealing device of a medical packaging bag-making machine according to claim 1, characterized in that, The telescopic end of the cylinder (3) is slidably connected to the housing (1).
7. The sealing device of a medical packaging bag-making machine according to claim 1, characterized in that, The heating plate (9) is in contact with two electric heating tubes (8).