Anti-burst heat sealing structure of cell cryopreservation bag

Abstract

This utility model relates to the field of cell cryopreservation bag processing technology, specifically a burst-proof heat-sealing structure for cell cryopreservation bags. It includes a worktable with a bottom pressing section on the worktable and a top pressing section that can be raised and lowered above it. A guide roller is located at the front end of the bottom pressing section, and the guide roller is mounted on the worktable via a bearing seat. A pressing cooling structure is located behind the bottom pressing section. Both the bottom and top pressing sections include mounting bases. Two sets of moving blocks are symmetrically arranged on the mounting bases, with two blocks in each set, capable of synchronous relative movement. Fixed pressing strips are symmetrically arranged on opposite sides of both sets of mounting bases, and movable pressing strips are arranged on opposite sides of the moving blocks. A pressing arc angle is provided at the end of the movable pressing strip connecting to the fixed pressing strip. This utility model allows for flexible adjustment of the burst-proof pressing effect of the cell cryopreservation bag and also allows for flexible adjustment of the pressing width.

Description

Technical Field

[0001] This utility model relates to the field of cell cryopreservation bag processing technology, specifically a cell cryopreservation bag anti-burst heat-sealing structure. Background Technology

[0002] Cell cryopreservation bags are specialized containers used for long-term cryopreservation of biological samples (such as cells, stem cells, and immune cells). They are typically made of multi-layered polymer materials, possessing excellent biocompatibility, cryogenic resistance, and airtightness, maintaining stable performance even in liquid nitrogen (-196°C). With flexible capacity options and ease of labeling and retrieval, they are key tools for large-scale preservation and transportation in cell therapy, biopharmaceuticals, and other fields.

[0003] In the production of cell cryopreservation bags, heat sealing is one of the key processes, and its quality directly affects the sealing strength and burst-proof performance of the cryopreservation bags. In existing technologies, the heat sealing line is often straight or has a simple structure, which easily leads to stress concentration when the internal pressure of the cryopreservation bag increases, causing the heat-sealed seam to burst. Utility Model Content

[0004] The purpose of this invention is to provide a burst-proof heat-sealing structure for cell cryopreservation bags to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cell cryopreservation bag anti-burst heat-sealing structure, including a workbench, a bottom pressing part is provided on the workbench, a top pressing part is provided above the bottom pressing part and can be raised and lowered, a guide roller is provided at the front end of the bottom pressing part, wherein the guide roller is mounted on the workbench through a bearing seat, a pressing cooling structure is provided at the rear of the bottom pressing part, both the bottom pressing part and the top pressing part include a mounting base, two sets of moving blocks are symmetrically arranged on the mounting base, two moving blocks are symmetrically arranged in each set and can move synchronously relative to each other, a fixed pressing strip is symmetrically arranged on the opposite side of the two sets of mounting bases, a moving pressing strip is arranged on the opposite side of the moving blocks, and a pressing arc angle is provided at the end of the moving pressing strip connected to the fixed pressing strip.

[0006] The present invention is further configured such that a limiting groove is provided in the mounting base, and a limiting slider is slidably installed in the limiting groove. Both ends of the limiting slider extend to the outside of the mounting base and are connected to the corresponding moving block. A moving drive structure is provided between the limiting slider and the mounting base. The moving block can be moved and installed on the mounting base by the cooperation of the limiting slider and the limiting groove.

[0007] The present invention is further configured such that the moving drive structure includes a bidirectional screw, which is mounted in a limiting slide groove via bearings. A motor is mounted on the mounting base, and the motor is connected to the corresponding bidirectional screw via transmission. When the motor is started, the bidirectional screw is rotated by the motor. The movement of the limiting slider within the limiting slide groove can be controlled by the threaded engagement between the limiting slider and the bidirectional screw, and the sliding engagement between the limiting slider and the limiting slide groove. The movement of the limiting slider drives the corresponding moving blocks on both sides to move, so that the two moving blocks on the same side can move synchronously towards each other, thereby controlling the movement of the moving pressing strip mounted on the moving block relative to the fixed pressing strip. In this way, the width of the heat press can be flexibly adjusted according to the width of different models of cell cryopreservation bags.

[0008] The present invention is further configured such that the pressing and cooling structure includes a lower cooling roller located behind the bottom pressing part, and an upper cooling roller is arranged above the lower cooling roller. After the cell cryopreservation bag is hot-pressed and sealed, it will pass through the upper and lower cooling rollers. The cooperation of the upper and lower cooling rollers can shape the heat-sealed structure, prevent the material from deforming due to residual heat, and obtain a denser and stronger seal. The lower cooling roller is mounted on the worktable through a bearing seat, and the upper cooling roller can be mounted above the lower cooling roller through existing lifting structures such as bearing seats, electric cylinders, and telescopic rods.

[0009] The present invention is further configured such that a mounting frame is provided on one side of the workbench, an electric push rod is provided on the mounting frame, and the upper mounting seat is installed at the bottom end of the electric push rod. The electric push rod can control the lifting and lowering of the upper mounting seat, thereby controlling the lifting and lowering of the upper fixed pressing strip and the moving pressing strip.

[0010] The present invention is further configured such that limiting telescopic rods are provided on both sides of the electric push rod, the bottom end of the limiting telescopic rod is connected to the top mounting base, and the limiting telescopic rod can extend and retract synchronously with the electric push rod. By setting the limiting telescopic rod, the load on the electric push rod can be shared, thereby improving the lifting stability of the upper mounting base.

[0011] The present invention is further configured such that the surfaces of both the fixed pressing strip and the movable pressing strip are provided with pressing textures, the upper pressing textures and the lower pressing textures are staggered, and the pressing textures are provided with pressing protrusions in the middle. The pressing textures adopt a continuous wave or sawtooth structure, which increases the total length of the heat sealing line. The expansion force will be dispersed along the fold line to avoid excessive force at a single point leading to cracking. At the same time, the pressing protrusions between two adjacent sets of pressing textures will further improve the pressing and locking performance and prevent bursting.

[0012] The present invention is further configured such that both the fixed pressing strip and the movable pressing strip are provided with multiple heating modules, each of which is individually controllable. By setting multiple independent heating modules, multiple independent micro heating temperature zones are formed, which is crucial for achieving gradient width heat sealing and multiple sealing rings. Each heating temperature zone can be set with an independent temperature, thereby achieving different fusion effects on a heat sealing seam.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Excellent anti-burst effect: The staggered wave or sawtooth pressing texture increases the total length of the heat sealing line, so that the expansion force is dispersed along the fold line and avoids excessive force on a single point; the pressing protrusions between the pressing textures further improve the locking performance, and the pressing arc angle (radius ≥ 3mm) at the connection between the moving pressing strip and the fixed pressing strip changes the right angle to an arc, reducing stress concentration, effectively reducing the risk of brittle cracking, and adapting to the high pressure requirements of cell cryopreservation bags.

[0014] 2. Flexible adjustment of pressing width: The motor drives the bidirectional screw to rotate, which, together with the sliding guide of the limit slider and the limit groove, drives the two moving blocks on the same side to move synchronously towards each other. This allows for the adjustment of the position of the moving pressing strip relative to the fixed pressing strip. The hot pressing width can be precisely adjusted according to the width of different cell cryopreservation bags without changing the mold, thus improving adaptability.

[0015] 3. Stable and controllable heat sealing quality: The pressing strip has multiple independent heating modules built in, forming a micro heating temperature zone that can be individually controlled, enabling gradual width heat sealing and multiple sealing rings; after hot pressing, it is cooled immediately by the upper and lower cooling rollers, and the heat-sealed structure is shaped to avoid deformation due to residual heat, resulting in a dense and high-strength sealing seam. The electric push rod with limit telescopic rod ensures the stability of the pressing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof heat-sealing structure of a cell cryopreservation bag according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the explosion-proof heat-sealing structure of a cell cryopreservation bag according to this utility model. Figure 2 ; Figure 3 This is a cross-sectional schematic diagram of the installation structure of the movable block carrying the movable pressing strip on the mounting base in this utility model; Figure 4 This is a schematic diagram of the structure of the pressure bonding pattern in this utility model; Figure 5 This is a schematic diagram showing the installation position of the heating module on the fixed pressing strip and the movable pressing strip in this utility model.

[0017] The components represented by each number in the attached diagram are listed below: 1. Workbench; 2. Bottom pressing section; 3. Top pressing section; 4. Guide roller; 5. Mounting base; 6. Moving block; 7. Fixed pressing strip; 8. Moving pressing strip; 9. Pressing arc angle; 10. Limiting groove; 11. Limiting slider; 12. Bidirectional screw; 13. Motor; 14. Lower cooling roller; 15. Upper cooling roller; 16. Mounting bracket; 17. Electric push rod; 18. Limiting telescopic rod; 19. Pressing texture; 20. Pressing protrusion; 21. Heating module. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides a technical solution: Please refer to Figures 1-5 A burst-proof heat-sealing structure for cell cryopreservation bags includes a workbench 1, a bottom pressing part 2 on the workbench 1, a top pressing part 3 above the bottom pressing part 2 that can be raised and lowered, a guide roller 4 at the front end of the bottom pressing part 2, wherein the guide roller 4 is mounted on the workbench 1 through a bearing seat, a pressing cooling structure is provided at the rear of the bottom pressing part 2, both the bottom pressing part 2 and the top pressing part 3 include mounting bases 5, two sets of moving blocks 6 are symmetrically arranged on the mounting bases 5, two of each set of moving blocks 6 are symmetrically arranged and can move synchronously relative to each other, fixed pressing strips 7 are symmetrically arranged on the opposite side of the two sets of mounting bases 5, and moving pressing strips 8 are arranged on the opposite side of the moving blocks 6, and a pressing arc angle 9 is provided at the end of the moving pressing strip 8 that connects to the fixed pressing strip 7.

[0020] Please see Figures 1-5 As one embodiment of this utility model: In this utility model, a limiting groove 10 is provided in the mounting base 5, and a limiting slider 11 is slidably installed in the limiting groove 10. Both ends of the limiting slider 11 extend to the outside of the mounting base 5 and are connected to the corresponding moving block 6. A moving drive structure is provided between the limiting slider 11 and the mounting base 5. The moving block 6 can be moved and installed on the mounting base 5 through the cooperation of the limiting slider 11 and the limiting groove 10. The connection between the two sides of the limiting slider 11 and the limiting groove 10 can be protected by a soft membrane, corrugated cover or other structures to enhance the sealing and protection of the limiting groove 10.

[0021] Please see Figures 1-5As one embodiment of this utility model: the moving drive structure of this utility model includes a bidirectional screw 12, which is mounted in the limiting slide groove 10 through bearings. A motor 13 is provided on the mounting base 5, and the motor 13 is connected to the corresponding bidirectional screw 12 through transmission. When the motor 13 is started, the bidirectional screw 12 is rotated by the motor 13. The limiting slider 11 can be controlled to move in the limiting slide groove 10 through the threaded engagement between the limiting slider 11 and the bidirectional screw 12 and the sliding engagement between the limiting slider 11 and the limiting slide groove 10. The movement of the limiting slider 11 drives the corresponding moving blocks 6 on both sides to move, so that the two moving blocks 6 on the same side can move synchronously towards each other, thereby controlling the movement of the moving pressing strip 8 installed on the moving block 6 relative to the fixed pressing strip 7. In this way, the width of the heat pressing can be flexibly adjusted according to the width of different models of cell cryopreservation bags.

[0022] Please see Figures 1-5 As one embodiment of the present invention: the pressing and cooling structure of the present invention includes a lower cooling roller 14, which is located behind the bottom pressing part 2. An upper cooling roller 15 is provided above the lower cooling roller 14. After the cell cryopreservation bag is hot-pressed and sealed, it will pass through the upper cooling roller 15 and the lower cooling roller 14. The cooperation of the upper cooling roller 15 and the lower cooling roller 14 can shape the heat-sealed structure, prevent the material from deforming due to residual heat, and obtain a denser and stronger sealing seam. The lower cooling roller 14 is installed on the workbench 1 through a bearing seat, and the upper cooling roller 15 can be installed above the lower cooling roller 14 through existing lifting structures such as bearing seats, electric cylinders, telescopic rods, etc.

[0023] Please see Figures 1-5 As one embodiment of the present invention: A mounting frame 16 is provided on one side of the workbench 1, and an electric push rod 17 is provided on the mounting frame 16. The upper mounting seat 5 is installed at the bottom end of the electric push rod 17. The upper mounting seat 5 can be raised and lowered by the electric push rod 17, thereby controlling the raising and lowering of the upper fixed pressing strip 7 and the movable pressing strip 8.

[0024] Please see Figures 1-5 As one embodiment of the present invention: the electric push rod 17 is provided with limiting telescopic rods 18 on both sides. The bottom end of the limiting telescopic rod 18 is connected to the top mounting base 5, and the limiting telescopic rod 18 can extend and retract synchronously with the electric push rod 17. By setting the limiting telescopic rod 18, the load on the electric push rod 17 can be shared, and the lifting stability of the upper mounting base 5 can be improved.

[0025] Please see Figures 1-5As one embodiment of this utility model: In this utility model, the surfaces of both the fixed pressing strip 7 and the movable pressing strip 8 are provided with pressing textures 19. The upper pressing texture 19 and the lower pressing texture 19 are staggered. A pressing protrusion 20 is provided in the middle of the pressing texture 19. The pressing texture 19 adopts a continuous wave or sawtooth structure, which increases the total length of the heat sealing line. The expansion force will be dispersed along the fold line to avoid excessive force at a single point, which may lead to cracking. At the same time, the pressing protrusion 20 between two adjacent sets of pressing textures 19 will further improve the pressing and locking performance and prevent bursting.

[0026] Please see Figures 1-5 As one embodiment of the present invention: In the present invention, both the fixed pressing strip 7 and the movable pressing strip 8 are provided with multiple heating modules 21. Each heating module 21 is individually controllable. By setting multiple independent heating modules 21, multiple independent micro heating temperature zones are formed, which is crucial for achieving gradual width heat sealing and multiple sealing rings. Each heating temperature zone can be set with an independent temperature, thereby achieving different fusion effects on a heat sealing seam.

[0027] In summary: This invention is used in the heat sealing process of the bottom and top positions after the two sides of the cell cryopreservation bag have been heat-sealed. In use, the cell cryopreservation bags that require heat sealing are conveyed through the existing multi-roller conveyor structure, and the conveying is stopped when the bags reach the appropriate position. Start the electric push rod 17, and control the upper mounting base 5 to drive the moving block 6 to descend, thereby realizing the descent of the upper fixed pressing strip 7 and the moving pressing strip 8, which cooperate with the lower fixed pressing strip 7 and the moving pressing strip 8 to realize the heat pressing operation of the cell cryopreservation bag. During this process, the pressing lines 19 between the corresponding fixed pressing strips 7 and the moving pressing strips 8 will be misaligned and have a continuous wave or sawtooth structure. This can increase the total length of the heat sealing line, and the expansion force will be dispersed along the fold line to avoid excessive force at a single point leading to cracking. Meanwhile, the pressing protrusions 20 between two adjacent sets of pressing lines 19 will further improve the pressing and locking performance and prevent bursting. When it is necessary to heat press different models of cell cryopreservation bags, the motor 13 can be started to control the rotation of the bidirectional screw 12. The threaded engagement between the limit slider 11 and the bidirectional screw 12 and the sliding engagement between the limit slider 11 and the limit groove 10 control the movement of the limit slider 11 within the limit groove 10. The movement of the limit slider 11 drives the corresponding moving blocks 6 on both sides to move, so that the two moving blocks 6 on the same side can move synchronously towards each other. This controls the movement of the moving pressing strip 8 installed on the moving block 6 relative to the fixed pressing strip 7. In this way, the width of the heat press can be flexibly adjusted according to the width of different models of cell cryopreservation bags. This utility model changes the existing right-angle pressing structure at the four corners and the corners of the heat-sealed edge of the frozen bag to a rounded structure by setting a pressing arc angle 9 at one end of the movable pressing strip 8 connected to the fixed pressing strip 7. The rounded arc radius is ≥3mm. Right angles are high-frequency stress concentration points, while the rounded arc structure allows the force to be transmitted evenly along the curve, reducing the risk of brittleness. The cell cryopreservation bag after hot pressing will pass through the upper cooling roller 15 and the lower cooling roller 14. The lower cooling roller 14 cooperates with the upper cooling roller 15 to achieve timely cooling of the hot pressing part, shape the heat-sealed structure, prevent the material from deforming due to residual heat, and obtain a denser and stronger seal. This utility model can provide a slot in the middle of the upper and lower fixing strips 7 on one side of the mounting base 5 or at the required position to leave space for the installation of subsequent main pipelines, collection pipelines, outlet / collection pipelines, etc. of the cell cryopreservation bag.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cell cryopreservation bag anti-burst heat sealing structure, comprising a workbench (1), characterized in that: The workbench (1) is provided with a bottom pressing part (2), and a top pressing part (3) is provided above the bottom pressing part (2) in a height-adjustable manner. A guide roller (4) is provided at the front end of the bottom pressing part (2), and a pressing cooling structure is provided at the rear of the bottom pressing part (2). Both the bottom pressing part (2) and the top pressing part (3) include a mounting base (5). Two sets of moving blocks (6) are symmetrically arranged on the mounting base (5). There are two moving blocks (6) in each set, and they can run synchronously relative to each other. Fixed pressing strips (7) are symmetrically arranged on the opposite side of the two sets of mounting bases (5). Moving pressing strips (8) are arranged on the opposite side of the moving blocks (6). A pressing arc angle (9) is provided at the end of the moving pressing strip (8) that connects to the fixed pressing strip (7).

2. The anti-burst heat seal structure for cell cryo-bags according to claim 1, wherein: A limiting groove (10) is provided in the mounting base (5), and a limiting slider (11) is slidably installed in the limiting groove (10). Both ends of the limiting slider (11) extend to the outside of the mounting base (5) and are connected to the corresponding moving block (6). A moving drive structure is provided between the limiting slider (11) and the mounting base (5).

3. A cell cryo-bag anti-burst heat seal structure according to claim 2, wherein: The moving drive structure includes a bidirectional screw (12), which is mounted in a limiting slide groove (10) via a bearing. A motor (13) is provided on the mounting base (5), and the motor (13) is connected to the corresponding bidirectional screw (12) via a transmission connection.

4. The anti-burst heat seal structure for a cell cryo-bag according to claim 3, wherein: The pressing and cooling structure includes a lower cooling roller (14), which is located behind the bottom pressing part (2), and an upper cooling roller (15) is provided above the lower cooling roller (14).

5. The anti-burst heat seal structure for cell cryo-bags of claim 1, wherein: A mounting bracket (16) is provided on one side of the workbench (1), and an electric push rod (17) is provided on the mounting bracket (16). The mounting seat (5) above is installed at the bottom end of the electric push rod (17).

6. A cell cryo-bag anti-burst heat seal structure according to claim 5, wherein: The electric push rod (17) is provided with limit telescopic rods (18) on both sides. The bottom end of the limit telescopic rod (18) is connected to the top mounting base (5), and the limit telescopic rod (18) can extend and retract synchronously with the electric push rod (17).

7. The anti-burst heat seal structure for a cell cryo-bag according to claim 1, wherein: The surfaces of the fixed pressing strip (7) and the movable pressing strip (8) are provided with pressing patterns (19), the upper pressing pattern (19) and the lower pressing pattern (19) are staggered, and the pressing pattern (19) has a pressing protrusion (20) in the middle.

8. The anti-burst heat seal structure for cell cryo-bags of claim 1, wherein: Both the fixed pressing strip (7) and the movable pressing strip (8) are equipped with multiple heating modules (21), and each heating module (21) is individually controllable.

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