A modified atmosphere packaging machine sealing and cutting mechanism

Abstract

TECHNICAL FIELD: The utility model relates to the technical field of atmosphere packaging, especially to a kind of atmosphere packaging machine kind of lifting film utilization rate's seal cutting mechanism.Abstract: The utility model discloses a kind of atmosphere packaging machine seal cutting mechanism of lifting film utilization rate, solve the problem of high film waste rate due to cutting gap and position deviation. Including heating top plate, heating plate, cutter fixed plate, no-gap cutter, lower mould, film, heating plate pad, heating plate guide shaft. Core improvement is that cutter is arranged without gap, completely eliminates knife gap waste film strip;Lower mould, heating plate, cutter position accurate correspondence, make heat sealing area and cutting path match box type profile;Film is placed between heating plate and lower mould, both move towards until close heat sealing, cutter is relatively lowered profile cutting to lower mould. Waste film only comes from the waste material of box two sides. Film utilization rate is improved by ≥20%, significantly reduces the cost of high-barrier composite film (such as PA / PE);Synchronously reduce the pollution source of non-recyclable waste film, and environmental protection benefit is outstanding.

Description

Technical Field

[0001] This utility model relates to the field of modified atmosphere packaging technology, and in particular to a sealing and cutting mechanism for modified atmosphere packaging machines that improves film utilization. Background Technology

[0002] Modified atmosphere packaging (MAP) technology effectively inhibits microbial growth and food oxidation by altering the gas composition within the packaging (typically reducing oxygen concentration and increasing nitrogen / carbon dioxide concentration), thereby significantly extending the shelf life of fresh foods (such as meat, fruits and vegetables, cooked foods, and baked goods) and maximizing the preservation of their color, flavor, and nutritional value. It has become a key technology in modern food preservation. In MAP production lines, the sealing and cutting mechanism is the core functional unit for achieving film sealing and cutting; its performance directly affects packaging efficiency, sealing quality, and production costs. In existing technologies, film costs account for a high proportion, and high-quality barrier packaging films are crucial materials for ensuring the effectiveness of MAP, representing a significant portion of the overall packaging cost. Unusable, heat-sealed film waste (i.e., scraps) is formed between adjacent packages and at the edges of the packaging film, reducing the proportion of film area effectively used for packaging and increasing the amount of packaging film consumed per unit product. As production scales up (such as in large food processing plants), the accumulated economic losses and environmental burden from this waste are considerable. Furthermore, the films widely used in modified atmosphere packaging are mostly multi-layered composite materials (such as PE / EVOH / PA / PE structures) designed to meet multiple requirements, including barrier properties (oxygen and moisture barrier), mechanical strength, and heat-sealing properties. However, the inherent characteristics of these composite materials make them difficult to recycle effectively. High-quality barrier films account for a significant portion of the overall packaging cost, and any film waste generated during the packaging process becomes a difficult-to-manage pollutant, contributing to an increasingly severe environmental burden. Summary of the Invention

[0003] The purpose of this utility model is to provide a modified atmosphere packaging machine sealing and cutting mechanism that improves film utilization. During the sealing and cutting process, the film is located between the mold and the packaging box is placed in the lower mold and driven by the system. The lower mold and the heating plate move towards each other until they close. The heating plate performs a heat sealing operation. Then, the cutter moves down relative to the lower mold to complete the contour cutting of the film. Since the cutters are arranged without gaps, the amount of waste film generated is very small. To achieve the above purpose, this utility model provides the following technical solution: A modified atmosphere packaging machine sealing and cutting mechanism that improves film utilization includes a heating top plate (1), a heating plate (3), a cutter fixing plate (4), a cutter (5), a lower mold (7), a film (6), a heating plate pad (2), a heating plate guide shaft (8), and an upper mold fixing shaft (9). The film (6) is precisely laid between the heating plate (3) and the lower mold (7). The square box to be packaged is placed in the slot of the lower mold (7). The system drives the heating plate (3) and the lower mold (7) to move towards each other precisely until they close. The heating plate (3) applies a preset temperature and pressure to the film (6) to complete the heat sealing of the sealing area along the upper edge of the packaging box. The heating plate guide shaft (8) provides precise guidance for the up and down movement of the heating plate (3) to ensure verticality and positional repeatability. The heating plate pad (2) provides a rigid limit at the end of the stroke to ensure that the set maximum working pressure is reached when the pressure is applied and closed. The upper mold fixing shaft (9) is fixedly connected to the heating top plate (1) and the heating plate (3). After heat sealing, the heating plate (3) moves upward and the cutter fixing plate (4) carries the cutter (5) downward relative to the lower mold (7). The cutter (5) cuts the film (6) along the contour trajectory of the packaging box to complete the separation of the film and waste. The cutter (5) is fixed on the cutter fixing plate (4) and all cutters (5) are arranged closely without gaps. This design completely eliminates the linear waste film strips generated by traditional cutter seams, so that the waste film only comes from the unavoidable waste within the contour. After cutting, the cutter (5) resets, the lower mold (7) moves out of the workstation to unload the finished product, and at the same time, the new film (6) and packaging box are transported to the workstation, and the cycle repeats. The film is located between the heating plate and the lower mold. The lower mold is used to place the packaging box. Driven by the system, the lower mold and the heating plate move towards each other until they close, realizing the heat sealing operation of the film covering the packaging box placed in the lower mold. The cutter (fixed on the cutter fixing plate) moves down relative to the lower mold to complete the cutting of the film outline. The heating plate is set below the heating top plate and can move up and down along the heating plate guide shaft within the space defined by the heating top plate and the cutter fixing plate. The heating plate guide shaft provides motion guidance, and the heating plate pad is used to provide hard limit at the end of the stroke to ensure that the set maximum working pressure can be reached when the pressure is applied and closed. The upper mold fixing shaft is used to connect and fix the heating plate and the heating top plate (or other upper structural components that need to move synchronously with the heating plate, depending on the overall design). The cutter is fixedly installed on the cutter fixing plate, and the cutters are arranged without gaps.This close arrangement effectively avoids the formation of waste film strips between adjacent packaging units, which would otherwise result in gaps between traditional slit cutters, thus significantly reducing the amount of waste film. Attached Figure Description

[0004] Figure 1 This is a side structural diagram based on the present invention; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the arrangement of the heating plate and the cutting blade according to this utility model; Figure 4 This is a schematic diagram of the gapless arrangement of the cutter of this utility model; in the figure: 1. Heating top plate; 3. Heating plate; 4. Cutter fixing plate; 5. Cutter; 7. Lower mold; 6. Film; 2. Heating plate pad; 8. Heating plate guide shaft; 9. Upper mold fixing shaft. Detailed Implementation

[0005] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Figure 1As shown, this utility model provides a modified atmosphere packaging machine sealing and cutting mechanism that improves film utilization. The mechanism includes a heating top plate (1), a heating plate (3), a cutter fixing plate (4), a cutter (5), a lower mold (7), a film (6), a heating plate pad (2), a heating plate guide shaft (8), and an upper mold fixing shaft (9). The film (6) is precisely laid between the heating plate (3) and the lower mold (7). The square box to be packaged is placed in the slot of the lower mold (7). The system drive causes the heating plate (3) and the lower mold (7) to move precisely towards each other until they close. The heating plate (3) applies a preset temperature and pressure to the film (6) to complete the heat sealing of the sealing area along the upper edge of the packaging box. The heating plate guide shaft (8) provides precise guidance for the up-and-down movement of the heating plate (3), ensuring verticality and positional repeatability. The heating plate pad (2) provides a rigid limit at the end of the stroke, ensuring that the set maximum working pressure is reached when the pressure is applied for closure. The upper mold fixing shaft (9) is fixedly connected to the heating top plate (1) and the heating plate (3). After heat sealing, the heating plate (3) moves upward, and the cutting blade fixing plate (4) carries the cutting blade (5) downward relative to the lower mold (7). The cutting blade (5) cuts the film (6) along the contour of the packaging box, completing the separation of the film and waste. The cutting blade (5) is fixed on the cutting blade fixing plate (4), and all the cutting blades (5) are arranged closely without gaps. This design completely eliminates the linear waste film strips generated by the traditional blade seam, so that the waste film only comes from the unavoidable waste within the contour. After cutting, the cutting blade (5) is reset, the lower mold (7) moves out of the station to unload the finished product, and at the same time, the new film (6) and the packaging box are transported to the station, and the cycle is repeated. From the above description, it can be seen that the above-mentioned implementation case of this utility model mainly achieves the following technical effects: the film utilization rate is significantly improved, and the gapless arrangement design of the cutting blade (5) completely eliminates the linear waste film strips generated by the gap of the blade seam in the traditional cutting process. The one-to-one correspondence between the lower mold (7), heating plate (3), and cutter (5) ensures that the heat-sealing area and cutting path precisely match the outline of the packaging box, minimizing edge waste areas. The effective utilization rate of the film can be increased by ≥20%, significantly reducing the cost of packaging materials per unit product (especially significant for expensive high-barrier composite films). Since modified atmosphere packaging films are mostly non-recyclable multilayer composite materials (such as PA / PE), the direct reduction in waste film significantly reduces the source of terminal solid waste pollution, which is in line with the trend of green manufacturing. Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modified atmosphere packaging machine sealing and cutting mechanism for improving film utilization, comprising a heating top plate (1), a heating plate (3), a cutter fixing plate (4), a cutter (5), a lower mold (7), a film (6), a heating plate pad (2), a heating plate guide shaft (8), and an upper mold fixing shaft (9). The film (6) is precisely laid between the heating plate (3) and the lower mold (7). The packaged square box is placed in the slot of the lower mold (7). The system drives the heating plate (3) to apply a preset temperature and pressure to the film (6) to complete the heat sealing of the sealing area of ​​the upper edge of the packaging box. The heating plate guide shaft (8) provides guidance for the up and down movement of the heating plate (3). The heating plate pad (2) provides rigid limit at the end of the stroke. The upper mold fixing shaft (9) is fixedly connected to the heating top plate (1) and the heating plate (3). The cutter (5) is fixed on the cutter fixing plate (4), and all cutters (5) are arranged closely without gaps.

Images