A heat-shrink-free packaging machine
By combining the elastic film and the film feeding mechanism, and utilizing the material movement and pulling and the sealing and cutting blade, heat-free shrink packaging is achieved. This solves the problems of high energy consumption and packaging of items that are not resistant to high temperatures in traditional heat shrink packaging machines, and achieves a highly efficient and energy-saving packaging effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANDAN IDEAL PACKAGING MASCH CO LTD
- Filing Date
- 2026-05-11
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional heat shrink packaging machines consume a lot of energy, the packaging film shrinks unevenly and cannot be used on items that are not resistant to high temperatures, and existing non-heat shrink packaging machines cannot make the film tightly wrap the material.
Using an elastic film, the upper and lower film feeding mechanisms work in conjunction with the feeding mechanism to pull the packaging film by the movement of the material. The sealing and cutting knife and the pressing component work together to achieve tight wrapping and welding of the elastic film.
It reduces energy consumption, improves production efficiency, and can tightly wrap materials that are not resistant to high temperatures, achieving heat-shrink packaging.
Smart Images
Figure CN122144236A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of packaging film technology, and more particularly to a heat-free shrink packaging machine. Background Technology
[0002] Traditional packaging machines wrap the goods in a film and then use a heat shrink oven to tighten the film. This packaging method has several problems, including high power consumption (the temperature of the shrink oven is raised by heating elements, and the heat is blown evenly throughout the oven by a fan), uneven shrinkage of the film due to heat, and the inability to use heat shrink film on some heat-sensitive items.
[0003] Existing packaging machines push materials onto the discharge conveyor belt via a pusher mechanism. As the materials move onto the discharge conveyor belt, the upper and lower film feeding mechanisms release the packaging film, which wraps around the outside of the materials. Then, the upper sealing cutter descends to the lower sealing cutter, causing the packaging films on both sides to fuse together and be cut off at the fusion point. If heat shrink packaging film is not used or heat shrinking is not performed, the packaging film cannot tightly wrap around the outside of the materials.
[0004] Existing heat shrink packaging methods consume a lot of energy, and the problem that the packaging film cannot be tightly wrapped around the material without heat shrinking needs to be solved. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a heat-shrink packaging machine that tightly wraps materials with an elastic film without the need for heat shrinking, in order to address the above-mentioned technical deficiencies.
[0006] The technical solution adopted in this invention is as follows: a heat-free shrink packaging machine is provided, including a frame. An upper film feeding mechanism for providing an upper packaging film and a lower film feeding mechanism for providing a lower packaging film are respectively arranged on the upper and lower sides of the frame. A feeding mechanism is arranged between the upper film feeding mechanism and the lower film feeding mechanism. A packing pushing mechanism is arranged above the feeding mechanism. A discharge mechanism is arranged on the side of the feeding mechanism. An upper sealing cutter and a lower sealing cutter are symmetrically arranged on the side of the frame near the discharge mechanism. Both the upper sealing cutter and the lower sealing cutter are movably arranged on the frame. The upper film feeding mechanism is movably equipped with a swing frame, on which multiple upper film feeding swing rods are fixedly mounted. The upper film feeding swing rods abut against and are wrapped around an upper packaging film. The lower film feeding mechanism is movably equipped with a swing frame, on which multiple lower film feeding swing rods are fixedly mounted. The lower film feeding swing rods abut against and are wrapped around a lower packaging film.
[0007] To further optimize this technical solution, a pressing component is installed above the discharge mechanism.
[0008] To further optimize this technical solution, a brake roller and a film-turning roller are provided on the upper side of the frame and next to the upper film-feeding swing rod, and a brake rubber roller is also provided next to the brake roller.
[0009] To further optimize this technical solution, a second photoelectric switch is also provided on the side of the upper sealing cutter, and a corresponding first photoelectric switch is also provided at the positions of the upper film feeding swing arm and the lower film feeding swing arm. A third photoelectric switch is also provided on the side of the discharge mechanism near the frame.
[0010] To further optimize this technical solution, the upper film feeding mechanism and the lower film feeding mechanism each include a film feeding motor, which is used to supply film.
[0011] To further optimize this technical solution, the upper sealing cutter and the lower sealing cutter are thermomelt cutting structures that can cooperate with each other.
[0012] To further optimize this technical solution, each of the swing frames is equipped with a counterweight.
[0013] The beneficial effects of this invention are as follows: 1. Utilizing the inherent elasticity of the elastic film, it can tightly wrap around the material without heat shrinking, reducing energy consumption and improving production efficiency. It can tightly wrap materials that are not resistant to high temperatures. Existing packaging machines cannot directly achieve packaging with elastic film.
[0014] 2. After the upper and lower packaging films are stretched taut by the movement of the material, the upper and lower film feeding swing arms are triggered to move respectively. Then the upper and lower film feeding mechanisms start to supply film, so that the packaging film can adhere tightly to the material before sealing and cutting.
[0015] 3. The pressing component presses down on the upper packaging film on the material, fixing the material and pressing down on the lower packaging film on the underside of the material, so that the lower packaging film is in a state of tight contact with the material. The upper sealing cutter descends a certain distance and presses down on the upper packaging film, triggering the brake roller to fix the upper packaging film and stop film feeding. The upper sealing cutter continues to press down on the upper packaging film and approaches the lower sealing cutter, so that the upper packaging film wrapped on the side of the material is in an elastic stretching state. After the upper and lower packaging films are fused and cut, the material can be tightly wrapped by relying on the elastic retraction of the packaging film. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the side view structure; Figure 4 This is a schematic diagram of the front structure of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at position AA; Figure 6 For the present invention Figure 5A magnified schematic diagram of the structure at point a in the middle; Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at point b in the middle; Figure 8 For the present invention Figure 5 A magnified schematic diagram of the structure at point c in the middle; Figure 9 For the present invention Figure 5 A magnified schematic diagram of the structure at point d in the middle; Figure 10 This is a schematic diagram of the packaging film path of the present invention; Figure 11 This is a schematic diagram of the swing component structure of the present invention; Figure 12 This is a perspective structural diagram of the swing component of the present invention; Figure 13 This is a schematic diagram of the film feeding mechanism of the present invention; The markings in the diagram are as follows: 1. Frame; 101. Upper film feeding mechanism; 1011. Film feeding motor; 102. Lower film feeding mechanism; 103. Packaging pushing mechanism; 104. Discharge mechanism; 105. Feeding mechanism; 106. Upper sealing cutter; 107. Lower sealing cutter; 201. Upper film feeding swing arm; 202. Lower film feeding swing arm; 3. Swing assembly; 301. Swing frame; 302. Film rewinding roller; 303. Counterweight; 4. Packaging pressing component; 5. Brake roller; 501. Brake rubber roller; 601. Upper packaging film; 602. Lower packaging film. Detailed Implementation
[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0018] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0021] like Figure 1-13 As shown, a heat-free shrink packaging machine includes a frame 1. The upper and lower sides of the frame 1 are respectively provided with an upper film feeding mechanism 101 for providing an upper packaging film 601 and a lower film feeding mechanism 102 for providing a lower packaging film 602. A feeding mechanism 105 is provided between the upper film feeding mechanism 101 and the lower film feeding mechanism 102. A pushing mechanism 103 is provided above the feeding mechanism 105. A discharging mechanism 104 is provided on the side of the feeding mechanism 105. The pushing mechanism 103 is used to push the material from the feeding mechanism 105 to the discharging mechanism 104 on the side. An upper sealing cutter 106 and a lower sealing cutter 107 are symmetrically arranged on the side of the frame 1 near the discharging mechanism 104. Both the upper sealing cutter 106 and the lower sealing cutter 107 are movably mounted on the frame 1. The film feeding mechanism 101 is movably provided with a swing frame 301, and multiple film feeding swing rods 201 are fixedly provided on the swing frame 301. The film feeding swing rods 201 abut against and are wrapped around the upper packaging film 601. When the upper packaging film 601 is pulled and tightened by the material moved to the discharge mechanism 104, the upper packaging film 601 drives the film feeding swing rods 201 to move. After the film feeding swing rods 201 move, the film feeding mechanism 101 starts to supply film. The film feeding mechanism 102 is also movably equipped with a swing frame 301. Multiple film feeding swing rods 202 are fixedly mounted on the swing frame 301. The film feeding swing rods 202 abut against and are wrapped around the lower packaging film 602. When the lower packaging film 602 is pulled and tightened by the material moved to the discharge mechanism 104, the lower packaging film 602 drives the film feeding swing rods 202 to move. After the film feeding swing rods 202 move, the film feeding mechanism 102 starts to supply film. A pressing component 4 is installed above the discharge mechanism 104. The pushing mechanism 103 pushes the material to the discharge mechanism 104. After passing through the lower sealing cutter 107, the upper packaging film 601 and the lower packaging film 602 wrap the upper and lower sides of the material. The pressing component 4 descends to abut against the upper packaging film 601 on the upper side of the material. A brake roller 5 and a rewinding roller 302 are arranged on the upper side of the frame 1 and next to the upper film feeding swing arm 201. The upper packaging film 601 passes around the upper film feeding swing arm 201 and also passes around the brake roller 5 and the rewinding roller 302. After the upper sealing cutter 106 descends, the brake roller 5 is used to clamp the upper packaging film 601 and the upper film feeding mechanism 101 and the lower film feeding mechanism 102 stop feeding film. After the film feeding stops, the upper sealing cutter 106 presses down on the upper packaging film 601 and moves closer to the lower sealing cutter 107.
[0022] A brake roller 501 is also provided next to the brake roller 5. The brake roller 5 can move on the frame toward the brake roller 501. The upper packaging film 601 passes between the brake roller 501 and the brake roller 5.
[0023] When in use, when it is necessary to fix the upper packaging film 601, the brake roller 5 moves toward the brake rubber roller 501, and the upper packaging film 601 is partially clamped and fixed under the joint action of the brake roller 5 and the brake rubber roller 501.
[0024] A second photoelectric switch is also provided on the side of the upper sealing cutter 106 to detect the descent of the upper sealing cutter 106. Corresponding first photoelectric switches are also provided at the positions of the upper film feeding swing arm 201 and the lower film feeding swing arm 202 to detect their movement status. A third photoelectric switch is also provided on the side of the discharge mechanism 104 near the frame 1 to detect whether the material has been completely pushed onto the discharge mechanism 104.
[0025] Both the upper film feeding mechanism 101 and the lower film feeding mechanism 102 are equipped with a film feeding motor, which is used to feed packaging film to the upper film feeding swing arm 201 and the lower film feeding swing arm 202.
[0026] In use, the pushing mechanism 103 pushes the material to the discharging mechanism 104. The material enters the discharging mechanism 104 between the lower sealing cutter 107 and the upper sealing cutter 106. During the movement, the material pulls on the packaging film located between the two sealing cutters. The packaging film consists of two parts: an upper packaging film 601 extending from the direction of the upper sealing cutter 106 and a lower packaging film 602 extending from the direction of the lower sealing cutter 107. The upper packaging film 601 and the lower packaging film 602 are welded together at high temperature. The upper packaging film 601 and the lower packaging film 602 are connected to each other. After the material pulls the packaging film to a taut state, the material continues to move and pull the packaging film. Then, the upper packaging film 601 triggers the upper film feeding swing arm 201 to move, and the lower packaging film 602 triggers the lower film feeding swing arm 202 to move. After the first photoelectric switch detects the movement of the upper film feeding swing arm 201, the upper film feeding mechanism 101 starts to supply film. After the first photoelectric switch detects the movement of the lower film feeding swing arm 202, the lower film feeding mechanism 102 starts to supply film.
[0027] After the material is pushed past the lower sealing cutter 107 and completely moved onto the discharge mechanism 104, the third photoelectric switch is triggered. At this time, the packaging film covers the upper and lower sides of the material, and the pressing component 4 descends and abuts against the upper packaging film 601 on the upper side of the material, pressing down the upper packaging film 601 and the material. At the same time, the material itself also presses down the lower packaging film 602 on the lower side of the material. Subsequently, the upper sealing cutter 106 descends and presses down on the upper packaging film 601. After descending to the designated position, the second photoelectric switch is triggered. At this time, the upper film feeding mechanism 101 and the lower film feeding mechanism 102 stop feeding film, and the brake roller 5 actuates to clamp the upper packaging film 601, so that the original length of the upper packaging film 601 between the brake roller 5 and the material is limited. However, the upper sealing cutter 106 does not stop moving at this time. As the upper sealing cutter 106 continues to descend, it pulls the portion of the upper packaging film 601 between the pressing component 4 and the brake roller 5 down to the lower sealing cutter 107. The packaging film 601 is pressed tightly against the material by the pressing component 4, and the upper sealing cutter 106 descends from the side of the pressing component 4 to pull down the packaging film. At this time, the upper sealing cutter 106 stops moving and the upper packaging film 601 and the lower packaging film 602 are welded together by the upper sealing cutter 106 and the lower sealing cutter 107. Finally, the middle of the welded joint is cut to complete the sealing and cutting. At this time, the packaging film on the material is welded into a whole. The connection between the two sealing cutters is also welded together, ready for the next packaging operation.
[0028] After sealing and cutting, the upper sealing cutter 106 and the pressing component 4 rise and reset, and the elastic retraction makes the packaging film tightly wrap around the material.
[0029] The upper film feeding lever 201 and the lower film feeding lever 202 operate independently, respectively abutting against the upper packaging film 601 and the lower packaging film 602. They are used to trigger the upper film feeding mechanism 101 and the lower film feeding mechanism 102 to supply film after the packaging film is taut, ensuring the packaging film adheres tightly to the material. The upper and lower film feeding levers 201 and 202 can be equipped with counterweights 303 or elastic elements to change the movement conditions and thus adjust the triggering timing, ensuring the packaging film tightly wraps around the material. Changing the installation position of the second photoelectric switch can also adjust the triggering timing. The photoelectric switch is an existing product; those skilled in the art can adjust its installation position according to actual needs, and it is not shown in the accompanying drawings.
[0030] The upper sealing cutter 106, the pressing component 4, and the brake roller 5 can all be driven by existing linear reciprocating motion units. The brake roller 5 is located between the upper sealing cutter 106 and the upper film feeding swing arm 201; the upper sealing cutter 106 and the lower sealing cutter 107 are located on the side of the discharge mechanism 104 near the frame 1, and the horizontal position of the highest point of the lower sealing cutter 107 is flush with or slightly below the transport plane of the discharge mechanism 104 and the feeding mechanism 105.
[0031] The upper sealing cutter 106 and the lower sealing cutter 107 are a thermoforming cutting rhythm that can work together. Their structure and movement settings can realize the welding and cutting of the packaging film. For example, the upper sealing cutter 106 can be a plate structure to facilitate pressing down the upper packaging film 601. The lower sealing cutter 107 has heating welding function and cutting function. The lower sealing cutter 107 can be raised and lowered.
[0032] The pressing component 4 is located above the discharge mechanism 104 and next to the upper sealing cutter 106. The specific shape and type of the pressing component 4 are not limited. It can be a flat plate or a round roller, as long as it can press the upper packaging film 601 onto the upper surface of the material.
[0033] The parts such as the pushing mechanism 103, the film feeding mechanism, the sealing and cutting knife, and the discharging mechanism 104 are the same as those in the prior art. The packaging film is guided by several roller structures, and the settings in the prior art can also be referenced. This solution and the accompanying drawings do not limit the specific structure.
[0034] The material is suitable for products such as extruded polystyrene boards that cannot be high-pressure sealed, and through the elasticity and width adaptation of the packaging film, it can tightly wrap the sides that are not pressed.
[0035] Furthermore, each of the swing frames 301 is provided with a counterweight 303.
[0036] In use, both the upper film feeding swing arm 201 and the lower film feeding swing arm 202 move by swinging. When swinging, they can drive the swing frame 301 to swing. The position of the swing frame 301 can be detected by the first photoelectric switch. In the initial state, the packaging film is relatively loose. When the first photoelectric switch cannot detect the swing frame 301, it is determined that the corresponding upper film feeding swing arm 201 or lower film feeding swing arm 202 is moving.
[0037] Taking the film feeding mechanism 101 as an example, the film-reversing roller 302 is located between the upper film feeding swing rod 201 and the brake roller 5 (also between the upper film feeding swing rod 201 and the upper sealing cutter 106). The upper packaging film 601 passes around the film-reversing roller 302, then around the upper film feeding swing rod 201, and then passes through the brake roller 5. After the upper packaging film 601 is taut, it can pull the upper film feeding swing rod 201 to swing, which in turn drives the swing frame 301 to swing. Multiple film-reversing rollers 302 and upper film feeding swing rods 201 (set on the swing frame 301) can be set up to pass around in sequence, which is the existing conventional operation method. Guiding or limiting the packaging film through roller structures or box structures, etc., so that the path of the packaging film meets the requirements, is a conventional technical method.
[0038] The photoelectric switch is a conventional detection component, and will not be described in detail or illustrated in the accompanying drawings. Those skilled in the art can configure it in a suitable location depending on the intended use. By adjusting different triggering times, the overall tension of the packaging film can be adjusted.
[0039] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.
Claims
1. A heat-free shrink packaging machine, characterized in that, The machine includes a frame, on the upper and lower sides of which are respectively provided an upper film feeding mechanism for providing upper packaging film and a lower film feeding mechanism for providing lower packaging film. A feeding mechanism is provided between the upper and lower film feeding mechanisms. A pushing mechanism is provided above the feeding mechanism. A discharging mechanism is provided on the side of the feeding mechanism. An upper sealing cutter and a lower sealing cutter are symmetrically arranged on the side of the frame near the discharging mechanism. Both the upper sealing cutter and the lower sealing cutter are movably mounted on the frame. The upper film feeding mechanism is movably equipped with a swing frame, on which multiple upper film feeding swing rods are fixedly mounted. The upper film feeding swing rods abut against and are wrapped around an upper packaging film. The lower film feeding mechanism is movably equipped with a swing frame, on which multiple lower film feeding swing rods are fixedly mounted. The lower film feeding swing rods abut against and are wrapped around a lower packaging film.
2. The heat-free shrink packaging machine according to claim 1, characterized in that, A pressing component is installed above the discharge mechanism.
3. The heat-free shrink packaging machine according to claim 1, characterized in that, A brake roller and a rewinding roller are provided on the upper side of the frame and next to the upper film feeding swing rod. A brake rubber roller is also provided next to the brake roller.
4. The heat-free shrink packaging machine according to claim 1, characterized in that, A second photoelectric switch is also provided on the side of the upper sealing cutter, and a corresponding first photoelectric switch is also provided at the positions of the upper film feeding swing arm and the lower film feeding swing arm. A third photoelectric switch is also provided on the side of the discharge mechanism near the frame.
5. The heat-free shrink packaging machine according to claim 1, characterized in that, The upper film feeding mechanism and the lower film feeding mechanism each include a film feeding motor, which is used to supply film.
6. The heat-free shrink packaging machine according to claim 1, characterized in that, The upper sealing cutter and the lower sealing cutter are thermoforming cutting structures that can be used together.
7. A heat-free shrink packaging machine according to claim 1, characterized in that, Each of the aforementioned swing frames is equipped with a counterweight.