Aseptic bag production apparatus

Abstract

The application relates to a no-mouth sterile bag production device and belongs to the technical field of no-mouth sterile bags, which comprises a rack, a raw material roller, a heat sealing mechanism and a slitting mechanism, a lifting seat, a lifting assembly and a maintaining assembly. The maintaining assembly comprises two sliding ways arranged on the lifting seat and located at the two sides of the heat sealing mechanism, two sliding blocks slidingly arranged at the bottom ends of the two sliding ways, two abutting blocks slidingly arranged at the top ends of the two sliding ways, two maintaining springs with two ends respectively connected with the sliding blocks and the abutting blocks and enabling the two abutting blocks to abut against each other, two maintaining rollers rotatably installed on the two sliding blocks and abutting against and tensioning the ironing cloth under the action of the maintaining springs, and two push blocks slidingly arranged on the lifting seat and located above the two sliding blocks and used for tensioning the ironing cloth. The ironing cloth keeps a gap with the heat sealing mechanism before heat sealing, and the push roller pushes the ironing cloth to continuously keep a tensioning state when the ironing cloth is heat sealed, so that the production efficiency and quality of the sterile bag are improved.

Description

Technical Field

[0001] This application relates to the technical field of spoutless aseptic bags, and in particular to a spoutless aseptic bag production apparatus. Background Technology

[0002] Aseptic bags without spouts are a type of filling bag that maintains sterility without a spout or cap. They are an innovative packaging material used for packaging fluids, powders, or granules. Compared to traditional filling bags, aseptic bags do not have a fixed opening or cap; instead, they use a special sealing structure to make the entire bag a seamless, sealed container.

[0003] In the production of aseptic bags, a heat-sealing mechanism first heat-seals multiple layers of raw material film, and then a slitting mechanism cuts them into bags. Previously, the heat-sealing mechanism directly contacted the raw material film for heat sealing. Because the temperature of the heat-sealing mechanism was high, this contact with the raw material film could easily damage it, thus reducing the quality of the aseptic bags.

[0004] To address these issues, existing technologies typically involve installing a heat-sealing cloth on the outside of the heat-sealing mechanism. This cloth acts as a barrier between the mechanism and the raw material film, reducing the likelihood of the film being burned. Furthermore, the taut heat-sealing cloth enhances the heat-sealing effect when in contact with the film. However, existing heat-sealing cloths are generally kept continuously taut, constantly pressing against the heat-sealing mechanism. This makes the cloth susceptible to damage from prolonged exposure to high temperatures, thus reducing the quality of the aseptic bag. Summary of the Invention

[0005] In order to improve the production quality of sterile bags, this application provides a nozzle-free sterile bag production device, in which the ironing cloth can be automatically adjusted, only being stretched on the surface of the heat sealing mechanism during heat sealing, and automatically disengaging from the heat sealing mechanism when not heat sealing, thus ensuring the heat sealing quality and improving the service life of the ironing cloth.

[0006] This application provides a nozzle-free aseptic bag production device, which adopts the following technical solution:

[0007] A nozzle-free aseptic bag production apparatus includes a frame, a raw material roller, a lifting seat, and a cutting mechanism sequentially arranged on the frame. The lifting seat is equipped with a heat-sealing mechanism and a heat-sealing cloth. The frame is equipped with a holding assembly, which includes:

[0008] Two retaining rollers are rotatably mounted on the lifting seat via an elastic assembly and press against the ironing cloth under the action of elasticity to tighten it, so that the heat sealing mechanism maintains a gap with the ironing cloth when it is not in contact with the raw material film for heat sealing;

[0009] Two push blocks are slidably disposed on the lifting seat in a direction close to or away from the ironing cloth. Each push block is rotatably mounted with a push roller. Both push blocks are connected to two holding rollers through a linkage assembly, so that the two push rollers press against the ironing cloth for tension. After the holding rollers come into contact with the raw material film, they drive the push blocks and push rollers to approach the ironing cloth and are used to tension the ironing cloth.

[0010] By adopting the above technical solution, before heat sealing, the ironing cloth is separated from the ironing blade. When heat sealing is required, the raw material film stops running, the lifting component starts and drives the lifting seat and heat sealing mechanism to move down. The heat sealing mechanism moves down and causes the ironing cloth to contact the raw material film. Then it continues to move down, and the raw material film squeezes the elastic component and pushes the two holding rollers to move up. The moving of the holding rollers drives the push block to move up. The moving of the holding rollers causes the ironing cloth to relax, and the moving of the push block drives the two push rollers to approach the ironing cloth through the linkage component, so that the ironing cloth remains in a taut state. Thus, the ironing cloth and the heat sealing mechanism maintain a gap before heat sealing, and when the ironing cloth is heat sealed, the push rollers push the ironing cloth to continue to maintain a taut state. Therefore, the production efficiency and quality of sterile bags are improved. Moreover, the holding rollers press against the raw material film for positioning, reducing the probability of displacement of the multi-layer raw material film during heat sealing, thus further improving the production efficiency and quality of sterile bags.

[0011] Optionally, the elastic component includes:

[0012] Two slide rails are provided on the lifting seat and located on both sides of the heat sealing mechanism. The two slide rails are inclined and their top ends are close to each other.

[0013] Two sliders are respectively slidably disposed at the bottom ends of two slide tracks, and two retaining rollers are respectively rotatably mounted on the two sliders;

[0014] Two abutting blocks are respectively slidably disposed at the top of two slide tracks;

[0015] Two retaining springs are located on two slides respectively, and their ends are connected to the slider and the abutment block respectively, so that the two abutment blocks abut against each other.

[0016] By adopting the above technical solution, the two retaining rollers are pressed upward by the film, which causes the slider to move upward and press the retaining spring. The retaining spring presses the abutment block, and the two abutment blocks are positioned together. This allows the retaining rollers to press against the raw material film. When the ironing cloth separates from the raw material film, the retaining roller pushes the ironing cloth away from the heat sealing mechanism under the thrust of the retaining spring. At the same time, when the elasticity of one retaining spring decreases, the elasticity of the other retaining spring will push the two abutment blocks to move relative to each other, so that the tension of the ironing cloth on the two retaining rollers tends to be balanced. This improves the flatness of the ironing cloth even after the elasticity of the retaining spring decreases, thus further improving the production efficiency and quality of aseptic bags.

[0017] Optionally, the linkage component includes:

[0018] The first pushing block and the second pushing block are respectively disposed on the side wall of the push block and the slider on the opposite side and each has a pushing surface that is tightly attached to each other and in an inclined state.

[0019] By adopting the above technical solution, the movement of the slider drives the movement of the second push block, and the movement of the second push block drives the movement of the first push block and the push block, thereby realizing that the movement of the slider drives the slider to move simultaneously.

[0020] Optionally, the heat sealing mechanism includes:

[0021] A heat-sealing knife, which is mounted on a lifting seat and used for heating to heat-seal multilayer raw material films;

[0022] An abutment seat, which is disposed on the frame and located below the raw material film and is used to support the raw material film;

[0023] A cooling assembly is mounted on a lifting platform and is used to cool the heat-sealed area.

[0024] By adopting the above technical solution, when heat sealing is required, the multi-layer raw material film stops operating, the lifting component starts and drives the lifting seat and the hot knife to move down. The hot knife moves down and causes the hot cloth to come into contact with the raw material film. Then it continues to move, so that the hot cloth squeezes the raw material film, while the abutment seat supports the raw material film. The heat from the hot knife passes through the hot cloth and irons the raw material film, thereby connecting the multi-layer raw material film together to form a heat seal. Then the hot knife stops heating, the cooling component starts to cool and shape the hot knife and the raw material film. Then the lifting component starts and drives the lifting seat and the hot knife to move up. Then the raw material film continues to move, and then the above actions are repeated to complete the production of multiple sterile bags.

[0025] The lifting platform enables both heat sealing and cooling functions, allowing the cooling components to be closer to the raw material film, thus improving cooling efficiency and simultaneously enhancing the production quality and efficiency of aseptic bags.

[0026] Optionally, the cooling assembly includes:

[0027] The mounting plate is mounted on the lifting seat and has an internal mounting cavity. The hot knife is mounted on the lower surface of the mounting plate and extends into the mounting cavity. A heating tube for heating the hot knife is provided in the mounting cavity.

[0028] The input pipe and the output pipe are mounted on the mounting plate and are both connected to the mounting cavity, and are respectively equipped with an input valve and an output valve.

[0029] By adopting the above technical solution, when heat sealing is required, the input valve and output valve are closed, and the heating tube heats up the scalpel to achieve heat sealing of the raw material film. When the heat sealing is completed and cooling and shaping are required, the heating tube stops heating and the input valve and output valve are opened. Cooling gas enters the installation cavity through the input tube and then exits through the output tube, thereby cooling the scalpel and the heat-sealed area of ​​the raw material film. At the same time, the input cold air directly cools the heating tube, thereby accelerating the cooling efficiency and improving the production efficiency of aseptic bags.

[0030] Optionally, a buffer seat is connected to the lifting seat via multiple buffer springs, a movable disk is slidably mounted on the buffer seat, and an adjusting screw that is rotatably connected to the buffer seat is threaded onto the movable disk. The movable disk is positioned against the lifting seat under the action of the buffer springs, and the mounting plate is disposed on the buffer seat.

[0031] By adopting the above technical solution, turning the adjusting screw drives the buffer seat to move, thereby adjusting the vertical position of the hot knife.

[0032] Optionally, the ironing cloth is detachably mounted on the lifting base via two connecting components, the connecting components including:

[0033] A positioning column is rotatably mounted on a lifting seat and used to roll up the ironing cloth. A positioning screw is threadedly connected to the lifting seat and abuts against the positioning column for positioning.

[0034] A positioning ring, wherein the positioning ring is disposed on a positioning post;

[0035] A pressure plate is slidably disposed on a positioning ring in a direction close to or away from the ironing cloth. A clamping screw is threadedly connected to the positioning ring, which abuts against the pressure plate and causes the pressure plate to press the cloth.

[0036] By adopting the above technical solution, the ironing cloth is passed between the pressure plate and the positioning post. Then, the tightening screw is turned to push the pressure plate to press the cloth. The positioning post is then rotated to roll the ironing cloth onto the positioning post. The ironing cloth is then wrapped around two push rollers, two retaining rollers, and the ironing knife. The two push rollers and two retaining rollers press against the ironing cloth to tension it. The other side of the ironing cloth is then fixed and rolled up in the same way, so that the ironing cloth presses against the retaining components. The action of the two push rollers and two retaining rollers ensures that the ironing cloth is in a taut state when it is fixedly installed on the positioning post. Then, the positioning post is rotated to make the ironing cloth approach and abut against the ironing knife for positioning. This improves the convenience and flatness of the ironing cloth installation, thus improving the production quality of the aseptic bag.

[0037] Optionally, a tensioning mechanism is provided on the frame and located between the raw material roller and the heat sealing mechanism. Multiple tensioning mechanisms are provided, each used to tension the multilayer raw material film. The tensioning mechanism includes:

[0038] Tensioner frame, which is rotatably mounted on the frame;

[0039] Multiple rotating rollers are rotatably mounted on the frame;

[0040] Multiple tensioning rollers are rotatably mounted on a tensioning frame such that the raw material film passes sequentially over the multiple rotating rollers and the multiple tensioning rollers;

[0041] An adjustment component is mounted on the frame and connected to the tensioning frame. The adjustment component maintains the stability of the tensioning frame under air pressure and can adjust the air pressure as needed.

[0042] By adopting the above technical solution, a single-layer raw material film is sequentially passed through multiple rotating rollers and multiple tensioning rollers. Simultaneously, the adjusting component generates a thrust on the tensioning frame, causing the tensioning element to rotate, thereby generating a reaction force to tension the raw material film. Other layers of raw material film are then tensioned in the same direction. The multi-layer raw material film is then moved to the heat-sealing mechanism for heat sealing, and finally, it is cut by the slitting mechanism to obtain a nozzle-free aseptic bag. This reduces the probability of inconsistent tension in the multi-layer raw material film and allows for adjustment of the air pressure as needed, thus regulating the tension of the raw material film. Therefore, the accuracy of the position of the multi-layer raw material film when it reaches the heat-sealing mechanism is greatly improved, enhancing the production quality of the aseptic bag.

[0043] By using multiple rotating rollers and tensioning rollers to move the raw material film, the tension is distributed across the raw material film, reducing the probability of damage caused by excessive local stress on the raw material film, thus further improving the production quality of aseptic bags.

[0044] Meanwhile, during the heat sealing of the nozzleless aseptic bag, the filling port is first heat-sealed to form the filling port, and then the connecting part is heat-sealed. After production, it is packaged and transported. Because the nozzle is eliminated, the space occupied during packaging is greatly reduced. When transporting to the filling point, the connecting part is cut to expose the filling port, and then filling is carried out through the filling port. After filling, the filling port is sealed and then transported. This reduces the probability of spillage and contamination due to improper installation of the nozzle, thereby reducing production costs and improving transportation convenience.

[0045] Optionally, the adjustment component includes:

[0046] A cylinder, wherein the cylinder is rotatably mounted on the frame and the piston rod is rotatably connected to the tensioning frame;

[0047] An intake pipe and an exhaust pipe, wherein the intake pipe and the exhaust pipe are mounted on the cylinder and communicate with the inside of the cylinder;

[0048] A regulating valve is disposed on the intake pipe and is used to regulate the pressure of the gas entering the intake pipe;

[0049] An air inlet pipe is installed on a regulating valve and connected to an air source.

[0050] By adopting the above technical solution, gas enters the cylinder through the air inlet pipe, regulating valve, and air intake pipe, which pushes the piston rod and tensioning frame to rotate. The movement of the raw material film generates a reaction force, thereby tensioning the raw material film. Furthermore, the tension of the raw material film can be adjusted by regulating the air pressure through the regulating valve, thereby improving the production quality of aseptic bags.

[0051] Optionally, the slitting mechanism includes:

[0052] Multiple movable blocks are slidably mounted on the frame along the width direction of the raw material film and are threadedly connected to a movable screw that abuts against the frame for positioning. Each movable block is provided with a first cutter for slitting along the length direction of the raw material film.

[0053] A sliding block is slidably disposed on the frame along the width direction of the raw material film and is provided with a second cutter for slitting along the width direction of the raw material film;

[0054] A movable component, which is mounted on a frame and is used to drive the sliding block to move.

[0055] By adopting the above technical solution, the raw material film moves, causing multiple first cutters to cut the raw material film along its length. After the cutting is completed, the raw material film stops moving, the moving component starts to drive the sliding block to move, and the sliding block drives the second cutter to cut along the width of the raw material film. Then the moving component controls the sliding block to return to its original position to facilitate subsequent cutting, thereby achieving cutting of the raw material film in two mutually perpendicular directions, and finally completing the cutting of the sterile bag.

[0056] Optionally, the moving component includes:

[0057] Two sprockets, which are rotatably mounted on the frame;

[0058] A chain, which is fitted onto two sprockets and connected to a sliding block;

[0059] A mobile motor is mounted on a frame and connected to one of the sprockets.

[0060] By adopting the above technical solution, the mobile motor starts and drives the sprocket connected to it to rotate. The sprocket drives the chain to move and drives another sprocket to rotate. The movement of the chain drives the sliding block to move. The reversal of the mobile motor can drive the sliding block to move back, thereby realizing the control of the reciprocating movement of the sliding block.

[0061] In summary, this application includes at least one of the following beneficial technical effects:

[0062] By maintaining a gap between the heat-sealing cloth and the heat-sealing mechanism before heat sealing, and pushing the heat-sealing cloth to continue to maintain tension during heat sealing, the production efficiency and quality of aseptic bags are improved. Moreover, the roller is positioned on the raw material film, reducing the probability of displacement of the multi-layer raw material film during heat sealing, thus further improving the production efficiency and quality of aseptic bags. Attached Figure Description

[0063] Figure 1 This is a three-dimensional structural diagram of this application;

[0064] Figure 2 This is a schematic diagram of the heat sealing mechanism in this application;

[0065] Figure 3 This is a partial structural diagram of the present application, mainly showing the heat sealing mechanism, linkage component and elastic component, with a cross-sectional view of one of the slides;

[0066] Figure 4 This is a schematic diagram of the tensioning mechanism in this application;

[0067] Figure 5 This is a schematic diagram of the slitting mechanism in this application.

[0068] Reference numerals: 1. Frame; 14. Raw material roller; 15. Guide roller; 16. Guide roller; 2. Tensioning mechanism; 21. Tensioning frame; 22. Rotating roller; 23. Tensioning roller; 24. Rotating shaft; 3. Adjusting assembly; 31. Cylinder; 32. Air inlet pipe; 33. Air outlet pipe; 34. Adjusting valve; 35. Air inlet pipe; 4. Heat sealing mechanism; 41. Lifting seat; 43. Hot knife; 44. Abutment seat; 45. Hot cloth; 46. Moving seat; 461. Buffer spring; 462. Buffer seat; 463. Moving disc; 464. Adjusting screw; 5. Cooling assembly; 51. Mounting plate; 52. Input pipe; 53. Output pipe; 54. Input valve; 55. Output valve; 6. 61. Maintaining component; 62. Slide rail; 63. Block; 64. Maintaining spring; 65. Maintaining roller; 66. Push block; 661. Slide rail; 67. Push roller; 68. Linkage component; 681. First pushing block; 682. Second pushing block; 683. Pushing surface; 7. Connecting component; 71. Positioning post; 72. Positioning ring; 73. Pressure plate; 74. Positioning screw; 76. Clamping screw; 8. Cutting mechanism; 81. Moving block; 82. Sliding block; 83. Cutting rod; 84. Moving screw; 85. First cutter; 86. Second cutter; 9. Moving component; 91. Sprocket; 92. Chain; 93. Moving motor; 10. Elastic component. Implementation

[0069] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0070] Aseptic bags without nozzles are formed by heat-sealing multiple layers of raw material film. The raw material film moves along its length, and a filling port is formed at the bag opening during heat sealing. Simultaneously, the raw material film between adjacent aseptic bags along the length of the raw material film forms a connecting portion, which temporarily seals the filling port. The filling port is positioned parallel to the length of the raw material film, while multiple aseptic bags are arranged at intervals perpendicular to the length of the raw material film. The connecting portions on two aseptic bags arranged perpendicular to the length of the raw material film are interconnected. Therefore, multiple connecting portions can be heat-sealed through a single heat-sealing structure spanning the raw material film. When the aseptic bags are transported to the filling point, the connecting portions are cut using equipment to open the filling port for filling. After filling, the bags are heat-sealed. Other methods can also be used to open the filling port.

[0071] This application discloses an apparatus for producing aseptic bags without spouts.

[0072] Reference Figure 1The aseptic bag production device includes a frame 1, multiple raw material rollers 14 arranged sequentially on the frame 1, a tensioning mechanism 2, a heat sealing mechanism 4, and a slitting mechanism 8. The multiple raw material rollers 14 are rotatably mounted on the frame 1 and spaced apart along the length of the frame 1. Raw material film is wound on each of the multiple raw material rollers 14. The length of the frame 1 is parallel to the length of the raw material film. Horizontal guide rollers 15 are rotatably mounted on the frame 1 and below the multiple raw material rollers 14. The guide rollers 15 are used to guide the raw material film. The multiple guide rollers 15 are arranged vertically at intervals, so that the multiple layers of raw material film are arranged vertically at intervals. The tensioning mechanism 2 is provided with multiple layers and is used to tension the multiple layers of raw material film. The heat sealing mechanism 4 and the slitting mechanism 8 are used to heat seal and slit the raw material film, respectively.

[0073] Reference Figure 1 and Figure 2 Multiple heat-sealing mechanisms 4 are provided and arranged at intervals on the frame 1 as needed. The heat-sealing mechanisms 4 are divided into two types along the arrangement direction: transverse and longitudinal. The transverse heat-sealing mechanisms 4 are arranged along the length of the raw material film and heat-seal the film to form a filling port. The longitudinal heat-sealing mechanisms 4 are arranged perpendicular to the length of the raw material film and span across the film, heat-sealing it to form a connecting part. First, the raw material film is heat-sealed to form a filling port. Then, as the film moves, it continues to be heat-sealed to form a connecting part, which seals the filling port. The following explanation uses the transverse heat-sealing mechanism 4 as an example.

[0074] A lifting seat 41 is vertically slidably installed on the side wall of the opposite side of the frame 1. The lifting seat 41 is in a horizontal state and its length direction is perpendicular to the length direction of the frame 1. A hot ironing cloth 45 is provided on the lifting seat 41 to separate the heat sealing mechanism 4 from the raw material film. A lifting assembly is provided on the frame 1 to drive the lifting seat 41 to move. At the same time, a lifting seat 41 and a lifting assembly are provided at each location where the heat sealing mechanism 4 is located. The lifting assembly is set on the frame 1 and is used to drive the lifting seat 41 to move vertically. The lifting assembly includes a lifting screw and a lifting motor. The lifting screw is rotatably installed on the side wall of the frame 1 and is in a vertical state and threadedly connected to the lifting seat 41. The lifting motor is fixedly installed on the frame 1, and the output shaft of the lifting motor is connected to the lifting screw. The lifting motor is a servo motor.

[0075] Reference Figure 1 and Figure 2A movable seat 46 is slidably mounted on the lifting seat 41 along its length, and a fixing screw is threaded onto the movable seat 46 to secure it against the lifting seat 41. Multiple movable seats 46 are spaced apart along the length of the lifting seat 41. A buffer seat 462 is mounted on the lower surface of the movable seat 46 via a buffer spring 461. The buffer spring 461 is fixedly mounted on the lower surface of the movable seat 46 and the upper surface of the buffer seat 462, and multiple buffer springs 461 are horizontally arranged. A movable disc 463 is slidably mounted on the upper surface of the movable seat 46. An adjusting screw 464 is threaded onto the movable disc 463 and rotatably connected to the buffer seat 462. The movable disc 463 is positioned against the movable seat 46 under the action of the buffer spring 461. Tightening the adjusting screw 464 can drive the buffer seat 462 to move vertically.

[0076] The heat sealing mechanism 4 includes a hot knife 43, an abutment seat 44, and a cooling component 5. The hot knife 43 is fixedly installed on the lower surface of the buffer seat 462, and the shape and size of the hot knife 43 are selected according to the shape and size of the heat sealing. After the hot knife 43 is heated, it can heat seal the multi-layer raw material film. In the transverse heat sealing mechanism 4, the length direction of the hot knife 43 is parallel to the length direction of the frame 1, while in the longitudinal heat sealing mechanism 4, the length direction of the hot knife 43 is perpendicular to the length direction of the frame 1. At the same time, the length direction of the buffer seat 462 is parallel to the length direction of the hot knife 43. The abutment seat 44 is fixedly installed on the frame 1 and is supported on the lower surface of the raw material film.

[0077] Reference Figure 2 and Figure 3 The cooling component 5 is disposed on the buffer seat 462 and is used to cool the raw material film at the heat sealing point. The cooling component 5 includes a mounting plate 51, an input pipe 52 and an output pipe 53. The mounting plate 51 is fixedly mounted on the lower surface of the buffer seat 462 and has an installation cavity inside. The hot knife 43 is fixedly mounted on the lower surface of the mounting plate 51 and extends into the installation cavity.

[0078] A heating tube for heating the hot knife 43 is fixedly installed inside the mounting cavity; the input pipe 52 and the output pipe 53 are fixedly installed on the outer wall of the mounting plate 51 and are both connected to the mounting cavity. An input valve 54 and an output valve 55 are fixedly installed on the input pipe 52 and the output pipe 53, respectively; when the heating tube stops heating, the input pipe 52 is used to input cooling gas to cool the mounting plate 51 and the hot knife 43, and then the hot gas in the mounting cavity is output through the output pipe 53 to cool the heat-sealed part of the raw material film; when heating is required, the input valve 54 and the output valve 55 are closed, and the heating tube is started to heat.

[0079] Reference Figure 2 and Figure 3The ironing cloth 45 is detachably mounted on the buffer seat 462 via two connecting components 7. The two connecting components 7 are located above the ironing blade 43 and on both sides of the length of the ironing blade 43, so that the ironing cloth 45 bypasses the ironing blade 43 and is used to prevent the ironing blade 43 from directly contacting the raw material film, thereby reducing the probability of the ironing blade 43 overheating and damaging the raw material film. The maintaining component 6 is mounted on the buffer seat 462 or the mounting plate 51 and is used to keep the ironing cloth 45 in a taut state. Before the ironing cloth 45 contacts the raw material film, the ironing cloth 45 maintains a certain gap with the ironing blade 43. When the ironing cloth 45 approaches and abuts against the ironing blade 43, the maintaining component 6 keeps the ironing cloth 45 in a taut state.

[0080] The connecting assembly 7 includes a positioning post 71, a positioning ring 72, and a pressure plate 73. The positioning post 71 is rotatably mounted on the side wall of the mounting plate 51, and the axis of the positioning post 71 is parallel to the length direction of the hot iron 43. A positioning screw 74 is threadedly connected to the mounting plate 51 and abuts against the positioning post 71. Two positioning rings 72 are provided and located at both ends of the positioning post 71. The positioning rings 72 are slidably sleeved on the positioning post 71 and are threadedly connected to a clamping screw that abuts against the positioning post 71 for positioning. The two ends of the pressure plate 73 are slidably mounted on the side wall of the two positioning rings 72 on opposite sides along the radial direction of the positioning post 71. The pressure plate 73 is arc-shaped and fits against the positioning post 71. At the same time, a clamping screw 76 is threadedly connected to the pressure plate 73 and abuts against the pressure plate 73, so that the pressure plate 73 presses the fabric.

[0081] Tighten the clamping screw 76 away from the pressure plate 73, then pass the ironing cloth 45 between the pressure plate 73 and the positioning post 71. Tighten the clamping screw 76 to drive the pressure plate 73 to press the cloth. Rotate the positioning post 71 to roll the ironing cloth 45 onto the positioning post 71. Then, pass the ironing cloth 45 around the retaining component 6 so that the retaining component 6 presses against the ironing cloth 45. Next, pass the ironing cloth 45 between another pressure plate 73 and the positioning post 71. Pull the ironing cloth 45 and, under the action of the retaining component 6, the ironing cloth 45 will be in a flat state. Then, tighten the clamping screw 76 to fix the ironing cloth 45. Then, continue to rotate the positioning post 71 to roll up the ironing cloth 45 so that the retaining component 6 presses against the ironing cloth 45, and maintain a gap between the ironing cloth 45 and the ironing knife 43. Finally, tighten the positioning screw 74 to position the positioning post 71, thereby realizing the replacement of the ironing cloth 45.

[0082] Reference Figure 2 and Figure 3The following explanation uses the example of the retaining component 6 located on the mounting plate 51. The retaining component 6 includes two retaining rollers 65, two push blocks 66, and two slides 61 fixedly installed on one end of the mounting plate 51. The two retaining rollers 65 are rotatably set on the mounting plate 51 by the elastic component 10 and are pressed against the ironing cloth 45 under the action of elasticity to tighten it, so that the ironing knife 43 maintains a gap with the ironing cloth 45 when it is not in contact with the raw material film for heat sealing. The elastic component 10 includes two slides 61, two sliders 62, two abutting blocks 63, and two retaining springs 64. The two slides 61 are fixedly installed on the mounting plate 51 and arranged in a figure-eight shape. The two slides 61 are located on both sides of the ironing knife 43 near the two connecting components 7. The top ends of the two slides 61 are close to each other and the bottom ends are far apart. The bottom ends of the two slides 61 extend to both sides of the ironing knife 43. Sliding holes are opened on the opposite side walls of the slides 61 along the length of the slides 61.

[0083] Two sliders 62 are slidably mounted on the bottom ends of two slide rails 61. A blocking block is fixedly mounted on the side wall of the slider 62 and slidably mounted on the sliding hole. The blocking block is used to prevent the slider 62 from falling off the slide rail 61. Two abutting blocks 63 are slidably mounted on the top ends of the two slide rails 61 respectively. The sliding direction of the slider 62 and the abutting block 63 on the same slide rail 61 is parallel to the length direction of the slide rail 61. Two retaining springs 64 are located on the two slide rails 61. The retaining springs 64 are fixedly mounted on the opposite side walls of the slider 62 and the abutting block 63. The retaining springs 64 cause the bottom ends of the two sliders 62 to extend below the slide rail 61, while the top ends of the two abutting blocks 63 extend above the slide rail 61 and abut against each other for positioning. At the same time, two slide rails 61 are provided at both ends of the mounting plate 51. Each slide rail 61 is provided with a slider 62, a retaining spring 64 and an abutting block 63.

[0084] Two retaining rollers 65 are rotatably mounted on two sliders 62 located at both ends of the mounting plate 51, and the retaining rollers 65 are located below the slide rail 61. The axis of the retaining rollers 65 is parallel to the length direction of the hot iron 43. The two retaining rollers 65 are pressed against the hot ironing cloth 45 under the action of the retaining spring 64, so that the hot ironing cloth 45 and the hot iron 43 maintain a gap before the hot ironing cloth 45 comes into contact with the raw material film.

[0085] Reference Figure 2 and Figure 3Horizontal slide rails 661 are fixedly installed at both ends of the mounting plate 51 and on both sides of the two slide rails 61 near the two positioning posts 71. The slide rails 661 are located above the slide rails 61. Four push blocks 66 are provided and are located on the four slide rails 661 respectively. The push blocks 66 are horizontally slidably installed on the slide rails 661. Two push rollers 67 are provided and are rotatably installed on the side wall of the opposite side of the two push blocks 66. The axis of the push rollers 67 is parallel to the axis of the holding rollers 65. The push blocks 66 are connected to the sliders 62 through the linkage assembly 68, so that the holding rollers 65 and the push rollers 67 are pressed against the ironing cloth 45 for positioning. At the same time, when the sliders 62 move upward, the push rollers 67 are pushed closer to the ironing cloth 45 through the linkage assembly 68.

[0086] The linkage component 68 includes a first pushing block 681 and a second pushing block 682. The first pushing block 681 and the second pushing block 682 are respectively fixedly installed on the side wall of the push block 66 and the slider 62 on opposite sides. The first pushing block 681 and the second pushing block 682 are provided with mutually fitting pushing surfaces 683. The pushing surfaces 683 are in an inclined state. When the slider 62 moves upward, it drives the second pushing block 682 to move upward. The upward movement of the second pushing block 682 pushes the first pushing block 681, the push block 66 and the push roller 67 to approach the ironing cloth 45. The ironing cloth 45 passes around the push roller 67, two holding rollers 65 and another push roller 67 in sequence, so that the two push rollers 67 and the two holding rollers 65 press against the ironing cloth 45 for positioning.

[0087] The ironing cloth 45 approaches and presses against the raw material film, thereby pushing the ironing cloth 45 against the ironing blade 43, so that the heat on the ironing blade 43 is conducted to the raw material film for heat sealing. As a result, the holding roller 65 moves upward under the support of the raw material film, so that the tension of the holding roller 65 on the ironing cloth 45 decreases and relaxes. The upward movement of the holding roller 65 drives the slider 62 and the second push block 682 to move upward. The upward movement of the second push block 682 pushes the push block 66 and the push roller 67 closer to the ironing cloth 45, so that the relaxed ironing cloth 45 continues to be tensioned. At the same time, the two holding rollers 65 press against the raw material film for positioning, reducing the probability of displacement during the heat sealing of the raw material film.

[0088] The lifting seat 41 moves upward, causing the holding roller 65 to move away from the raw material film. Under the action of the holding spring 64, the holding roller 65 pushes the holding roller 65 to squeeze the ironing cloth 45, while the ironing cloth 45 pushes the push roller 67 to move back. The slider 62 moves upward and pushes the two abutting blocks 63 to squeeze each other through the holding spring 64. When the elasticity of one of the holding springs 64 decreases, the two abutting blocks 63 slide against each other to compensate for the pushing force on the other slider 62, so that the tension of the two holding rollers 65 on the ironing cloth 45 tends to be balanced.

[0089] Reference Figure 1 and Figure 4Multiple tensioning mechanisms 2 are vertically spaced and correspond one-to-one with multiple layers of raw material film, so that each layer of raw material film is tensioned individually, and the tension of each layer of raw material film can be adjusted according to different tension requirements; the tensioning mechanism 2 includes a tensioning frame 21, multiple rotating rollers 22, multiple tensioning rollers 23 and an adjustment component 3. The tensioning frame 21 is rotatably mounted on opposite side walls of the frame 1 via a rotating shaft 24. The rotating shaft 24 is horizontal and its axis is perpendicular to the length direction of the frame 1.

[0090] Multiple rotating rollers 22 are rotatably mounted on the frame 1 and located above the tensioning frame 21, while multiple tensioning rollers 23 are rotatably mounted on the tensioning frame 21. The axes of the tensioning rollers 23, rotating rollers 22, and rotating shaft 24 are coincident. At the same time, the multiple tensioning rollers 23 are located on the side of the rotating shaft 24 away from the raw material roller 14. The multiple tensioning rollers 23 and multiple rotating rollers 22 are all arranged along the length of the frame 1, so that the raw material film passes around the rotating rollers 22 and tensioning rollers 23 in sequence, realizing that the raw material film alternately passes around the rotating rollers 22 and tensioning rollers 23, and finally moves forward after passing around the rotating rollers 22. Guide rollers 16 are rotatably mounted on the frame 1 and located between the tensioning mechanism 2 and the heat sealing mechanism 4. Two guide rollers 16 are arranged vertically at intervals and are used to guide the raw material film. After the multiple layers of raw material film are tensioned, they all pass through the two guide rollers 16, so that the multiple layers of raw material film are bonded together and move forward.

[0091] The adjusting component 3 is mounted on the frame 1 and connected to the tensioning frame 21. Under air pressure, the adjusting component 3 maintains the stability of the tensioning frame 21 and can adjust the air pressure as needed. The tensioning frame 21 generates a reaction force to overcome the tension of the raw material film, thereby achieving tensioning of the raw material film. The adjusting component 3 includes a cylinder 31, an air inlet pipe 32 and an air outlet pipe 33, an adjusting valve 34 and an air inlet pipe 35. The cylinder 31 is rotatably mounted on the frame 1 and its piston rod is rotatably connected to the tensioning frame 21. The connection between the piston rod of the cylinder 31 and the tensioning frame 21 is located on the side of the rotating shaft 24 away from the tensioning roller 23. The air inlet pipe 32 and the air outlet pipe 33 are fixedly mounted on the cylinder 31 and communicate with the inside of the cylinder 31. The adjusting valve 34 is fixedly mounted on the air inlet pipe 32 and is used to adjust the gas pressure entering the air inlet pipe 32 and can display the air pressure. The air inlet pipe 35 is fixedly mounted on the adjusting valve 34 and communicates with the gas source and is used to supply gas.

[0092] Gas enters the cylinder 31 through the inlet pipe 35, regulating valve 34, and inlet pipe 32, thereby pushing the piston rod to extend and drive the tensioning frame 21 to rotate. The rotation of the tensioning frame 21 drives multiple tensioning rollers 23 to simultaneously tension the raw material film. The gas in the cylinder 31 is output through the outlet pipe 33. The greater the air pressure in the cylinder 31, the greater the tension force on the raw material film. When the tension on the raw material film suddenly increases, it will push the piston rod to move back. Outside air can be input into the cylinder 31 through the outlet pipe 33 to buffer when the raw material film is under great stress. After the raw material film recovers from the stress, the piston rod of the cylinder 31 continues to push the tensioning frame 21 back to its original position under the action of air pressure, and then continues to tension the raw material film. At the same time, the tension force of the raw material film can be adjusted by regulating the air pressure through the regulating valve 34.

[0093] Reference Figure 1 and Figure 5 The slitting mechanism 8 includes multiple moving blocks 81, sliding blocks 82, and moving components 9. A slitting rod 83 is fixedly installed on the side wall of the frame 1 on the opposite side, and the length direction of the slitting rod 83 is parallel to the length direction of the frame 1. Multiple moving blocks 81 are slidably sleeved on the slitting rod 83, and a moving screw 84 is threadedly connected to the moving block 81 to abut against the slitting rod 83 for positioning. A first cutter 85 for slitting the raw material film is fixedly installed on the moving block 81. The first cutter 85 slits the raw material film along the length direction of the frame 1. The sliding block 82 is slidably installed on the frame 1 along the length direction perpendicular to the frame 1, and the sliding block 82 is located on the side of the moving block 81 away from the raw material roller 14. A second cutter 86 is fixedly installed on the upper surface of the sliding block 82, and the second cutter 86 is used to slit the raw material film along the length direction perpendicular to the frame 1.

[0094] The moving component 9 is mounted on the frame 1 and is used to drive the sliding block 82 to move. The moving component 9 includes two sprockets 91, a chain 92, and a moving motor 93. The two sprockets 91 are rotatably mounted on the frame 1 and located on both sides of the raw material film. The chain 92 is sleeved on the two sprockets 91 and fixedly connected to the sliding block 82. The moving motor 93 is fixedly mounted on the frame 1, and its output shaft is connected to one of the sprockets 91. The movement of the raw material film causes multiple first cutters 85 to first cut the heat-sealed raw material film. At the same time, the raw material film continues to move forward and then stops. Then, the moving motor 93 starts and drives the sprockets 91 to rotate. The rotation of the sprockets 91 drives the chain 92 and the sliding block 82 to move. The movement of the sliding block 82 drives the second cutter 86 to cut the raw material film, thereby completing the cutting of the sterile bag.

[0095] The working principle of this application embodiment is as follows:

[0096] The raw material film on the raw material roller 14 passes through the guide roller 15 and then passes through multiple rotating rollers 22 and multiple tensioning rollers 23 in sequence. The cylinder 31 pushes the tensioning frame 21 to rotate under air pressure, thereby tensioning the raw material film. After being tensioned, the multi-layer raw material film moves together after passing through two guide rollers 16. The multi-layer raw material film moves to the bottom of the hot knife 43, and the abutment seat 44 supports the raw material film. Then, the lifting motor starts and drives the hot knife 43 and the hot cloth 45 to move down. At the same time, the heating tube heats the hot knife 43. After the hot cloth 45 comes into contact with the raw material film, it is pushed and pressed against the hot knife 43. The heat on the hot knife 43 is conducted to the raw material film for heat sealing. At the same time, the raw material film supports and pushes the holding roller 65 and the slider 62 to move up. The push roller 67 moves closer to the hot cloth 45 under the action of the slider 62, thereby increasing the tension on the hot cloth 45 and improving the heat sealing efficiency and quality of the raw material film.

[0097] After heat sealing is completed, the heating tube stops heating, and then the input valve 54 and output valve 55 are opened. Cooling gas is input through the input pipe 52 and output through the output pipe 53, thereby cooling the heat-sealed area of ​​the heat-sealing knife 43, heat-sealing cloth 45, and raw material film. This improves the heat sealing efficiency and effect, and enables the aseptic bag to be heat-sealed to form a filling port. Then, after the raw material film is moved, heat sealing continues to form a connection part, thereby improving the production efficiency and quality of aseptic bags.

[0098] The raw material film is moved to the first cutter 85. As the raw material film moves, multiple first cutters 85 cut the raw material film. Then the raw material film moves to the second cutter 86 and stops moving. The moving motor 93 starts and drives the second cutter 86 to cut the raw material film to obtain sterile bags. When the sterile bags are transported to the filling area, the equipment cuts the connecting part of the sterile bags. Then the sterile bags can be filled through the filling port. Finally, the sterile bags are heat-sealed, thereby improving the production efficiency and quality of sterile bags.

[0099] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nozzle-free aseptic bag production apparatus, comprising a frame (1), a raw material roller (14), a lifting seat (41), and a cutting mechanism (8) sequentially arranged on the frame (1), wherein the lifting seat (41) is provided with a heat sealing mechanism (4) and an ironing cloth (45), characterized in that: A support assembly (6) is provided on the frame (1), the support assembly (6) comprising: Two retaining rollers (65) are mounted on the lifting seat (41) by a spring assembly (10) and are pressed against the ironing cloth (45) under the action of the spring to tighten it, so that the heat sealing mechanism (4) maintains a gap with the ironing cloth (45) when it is not in contact with the raw material film for heat sealing; Two push blocks (66) are slidably disposed on the lifting seat (41) in a direction close to or away from the ironing cloth (45). Each push block (66) is rotatably mounted with a push roller (67). Both push blocks (66) are connected to two holding rollers (65) through a linkage assembly (68) so that the two push rollers (67) press against the ironing cloth (45) for tensioning. After the holding rollers (65) come into contact with the raw material film, they drive the push blocks (66) and push rollers (67) to approach the ironing cloth (45) and are used to tension the ironing cloth (45). The elastic component (10) includes: Two slide rails (61) are provided on the lifting seat (41) and located on both sides of the heat sealing mechanism (4). The two slide rails (61) are inclined and their top ends are close to each other. Two sliders (62) are respectively slidably disposed at the bottom ends of two slide rails (61), and two retaining rollers (65) are respectively rotatably mounted on the two sliders (62); Two abutting blocks (63) are respectively slidably disposed at the top of two slides (61); Two retaining springs (64) are located on two slides (61) respectively and their ends are connected to the slider (62) and the abutment block (63) respectively, so that the two abutment blocks (63) abut against each other.

2. The aseptic bag production device without spout according to claim 1, characterized in that: The linkage component (68) includes: The first push block (681) and the second push block (682) are respectively disposed on the side wall of the push block (66) and the slider (62) on opposite sides and are each provided with push surfaces (683) that are closely attached to each other and in an inclined state.

3. The aseptic bag production device without spout according to claim 1, characterized in that: The heat sealing mechanism (4) includes: A heat-sealing knife (43) is mounted on a lifting seat (41) and is used for heating to heat-seal the raw material film; Abutment seat (44) is provided on the frame (1) and located below the raw material film and is used to support the raw material film; Cooling assembly (5), which is disposed on lifting seat (41) and used to cool the heat seal.

4. The nozzle-free aseptic bag production device according to claim 3, characterized in that: The cooling assembly (5) includes: Mounting plate (51), the mounting plate (51) is set on lifting seat (41) and has an installation cavity inside, the hot knife (43) is set on the lower surface of mounting plate (51) and extends into the installation cavity, the installation cavity is provided with a heating tube for heating the hot knife (43); The input pipe (52) and the output pipe (53) are mounted on the mounting plate (51) and are connected to the mounting cavity, and are respectively equipped with an input valve (54) and an output valve (55).

5. The aseptic bag production apparatus without spout according to claim 4, characterized in that: The lifting seat (41) is connected to a buffer seat (462) by multiple buffer springs (461). A movable disk (463) is slidably mounted on the buffer seat (462). An adjusting screw (464) that is rotatably connected to the buffer seat (462) is threaded onto the movable disk (463). The movable disk (463) is positioned against the lifting seat (41) under the action of the buffer springs (461). The mounting plate (51) is set on the buffer seat (462).

6. The aseptic bag production device without spout according to claim 1, characterized in that: The ironing cloth (45) is detachably mounted on the lifting base (41) via two connecting components (7), the connecting components (7) including: Positioning post (71), which is rotatably mounted on lifting seat (41) and used to roll up ironing cloth (45), and a positioning screw (74) is threadedly connected to the lifting seat (41) to abut against the positioning post (71) for positioning. A positioning ring (72) is disposed on a positioning post (71); A pressure plate (73) is slidably disposed on a positioning ring (72) in a direction close to or away from the ironing cloth (45). A clamping screw (76) is threadedly connected to the positioning ring (72) and presses against the pressure plate (73) to press the cloth.

7. The aseptic bag production apparatus without spouts according to claim 1, characterized in that: A tensioning mechanism (2) is provided on the frame (1) and located between the raw material roller (14) and the heat sealing mechanism (4). Multiple tensioning mechanisms (2) are provided and are used to tension the raw material film. The tensioning mechanism (2) includes: Tensioning frame (21), which is rotatably mounted on frame (1); Multiple rotating rollers (22) are rotatably mounted on the frame (1); Multiple tension rollers (23) are rotatably mounted on a tensioning frame (21) such that the raw material film passes sequentially around multiple rotating rollers (22) and multiple tension rollers (23). Adjustment component (3), which is mounted on frame (1) and connected to tension frame (21), maintains the stability of tension frame (21) under air pressure and can adjust air pressure as needed.

8. The aseptic bag production apparatus without spout according to claim 7, characterized in that: The adjustment component (3) includes: Cylinder (31), the cylinder (31) is rotatably mounted on the frame (1) and the piston rod is rotatably connected to the tensioning frame (21); An intake pipe (32) and an exhaust pipe (33) are provided on a cylinder (31) and communicate with the inside of the cylinder (31); A regulating valve (34) is provided on the intake pipe (32) and is used to regulate the gas pressure entering the intake pipe (32); An air inlet pipe (35) is installed on a regulating valve (34) and connected to an air source.

9. The aseptic bag production device without spout according to claim 1, characterized in that: The cutting mechanism (8) includes: Multiple movable blocks (81) are slidably mounted on the frame (1) along the width direction of the raw material film and are threadedly connected to a movable screw (84) that abuts against the frame (1) for positioning. Each movable block (81) is provided with a first cutter (85) for cutting along the length direction of the raw material film. Sliding block (82), the sliding block (82) is slidably disposed on the frame (1) along the width direction of the raw material film and is provided with a second cutter (86) for cutting along the width direction of the raw material film. A moving component (9) is mounted on a frame (1) and is used to drive the sliding block (82) to move.

Images