A vacuum packaging machine sealing mechanism

Abstract

This utility model relates to the field of packaging machine technology and discloses a sealing mechanism for a vacuum packaging machine. It includes a housing and a heat-sealing mechanism for hot-melt sealing and rapid cooling. The heat-melt sealing mechanism consists of a heat-melt assembly and a cooling assembly. The heat-melt assembly includes two sets of mounting seats fixed to one side of the housing, located at the top and bottom of the housing's interior. A heating plate is embedded inside each mounting seat, and a heat-conducting plate that contacts the packaging is fixed to the bottom of the heating plate. Two electric rods are fixed to the top of the housing. The carbon fiber heating plate in the heat-melt assembly, combined with a thermally conductive silicone grease layer, improves the uniformity and efficiency of heat conduction, preventing localized overheating or underheating of the packaging film. The cooling assembly, through a combination of an air-cooling component, an air pump, and a heat exchange tank, rapidly delivers cold air to achieve cooling and shaping after sealing, solving the problem of sealing failure caused by uneven heating and slow cooling in traditional methods. This improves operational efficiency and ensures strong tear resistance of the seal.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically to a sealing mechanism for a vacuum packaging machine. Background Technology

[0002] Vacuum packaging machines, as core equipment for sealing and storing products and extending their shelf life, have seen their market size continue to expand in recent years due to consumption upgrades and increased demand for automated production. Their application share in food processing, electronics manufacturing, logistics and warehousing is growing, and their development prospects are broad.

[0003] In the food processing industry, vacuum packaging is used to isolate air, inhibit the growth of microorganisms, and extend the shelf life of products. In the electronics manufacturing industry, vacuum packaging is relied upon to prevent moisture and oxidation, and to prevent components from failing due to excessive humidity. These scenarios place high demands on the sealing quality and operating efficiency of vacuum packaging machines. Especially in mass production scenarios, the stability of the equipment directly affects the company's production capacity and product qualification rate.

[0004] However, the existing heat-sealing mechanism of vacuum packaging machines still has technical limitations: the heating stage mostly uses traditional metal heating strips, which have a slow heat conduction rate and poor uniformity; the cooling stage mostly relies on natural cooling or simple air ducts. In high-efficiency production scenarios such as food production lines and batch packaging of electronic components, this significantly prolongs the operation cycle, restricts equipment capacity, and makes it difficult to meet the core needs of enterprises for efficient packaging. Therefore, it is urgent to develop a sealing mechanism for vacuum packaging machines to solve these practical problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a sealing mechanism for a vacuum packaging machine, which solves the technical problems of slow and uneven heat transfer from traditional heating strips, reliance on natural cooling and simple air ducts, resulting in long cycles and limited production capacity.

[0006] To achieve the above objectives, this utility model provides a vacuum packaging machine sealing mechanism through the following technical solution: a housing, and a hot-melt sealing mechanism for hot-melt sealing and rapid cooling, wherein the hot-melt sealing mechanism consists of a hot-melt component and a cooling component;

[0007] The hot-melt assembly includes two sets of mounting bases fixed to one side of the box body. The two sets of mounting bases are located at the top and bottom of the box body respectively. A heating plate is embedded in the inner side of each set of mounting bases. A heat-conducting plate that contacts the packaging is fixed to the bottom of the heating plate. Two sets of electric rods are fixed to the top of the box body. Their output ends pass through the box body and are fixed to the top mounting base. A heat exchange groove is opened in the heat-conducting plate. An air inlet pipe and an exhaust pipe that communicate with the heat exchange groove are fixed to one side. A negative pressure groove is also opened in the inner side of the mounting base. The cooling assembly includes a shell that provides the mounting position, an air-cooling assembly that cools the air inside the shell, a delivery pipe that delivers cooling air, and an air pump that delivers cold air to the air inlet pipe.

[0008] Preferably, the housing is fixed to the back of the box, the air-cooling component is fixed inside the housing and one end extends out of the housing, the delivery pipe is installed through the bottom of the housing, the air pump is fixed to one side of the box, its air inlet end is connected to the delivery pipe, and its air outlet end is fixed to a three-way pipe, one end of the three-way pipe is connected to the air inlet pipe through a telescopic pipe.

[0009] Preferably, it also includes a negative pressure protection component, which includes a vacuum pump that provides negative pressure to the negative pressure tank, a negative pressure box for transferring and extracting air, a filter plate for separating and intercepting impurities in the transferred air, and a one-way valve pipe that restricts the one-way flow of air.

[0010] Preferably, the vacuum pump is fixed to one side inside the housing, its air inlet is fixed to a negative pressure box, the filter plate is fixed to the negative pressure box, and the one-way valve pipe is fixed to one side of the negative pressure box and its top end extends into the mounting base and communicates with the negative pressure groove.

[0011] Preferably, a sealing rubber strip is embedded in the inner surface of the mounting base, and the sealing rubber strip is located outside the negative pressure groove to seal the negative pressure groove.

[0012] Preferably, the heating plate is a carbon fiber heating plate, which is bonded to the heat-conducting plate through a thermally conductive silicone grease layer.

[0013] This invention provides a sealing mechanism for a vacuum packaging machine. Compared with the prior art, it has the following advantages.

[0014] 1. This utility model achieves efficient sealing through the synergy of a hot-melt component and a cooling component. In the hot-melt component, a carbon fiber heating plate combined with a thermally conductive silicone grease layer improves the uniformity and efficiency of heat conduction, avoiding local overheating or underheating of the packaging film. The cooling component, through the cooperation of an air-cooling component, an air pump, and a heat exchange tank, quickly delivers cold air to achieve cooling and shaping after sealing, solving the problem of sealing failure caused by uneven heating and slow cooling in traditional methods. This not only improves work efficiency but also ensures strong tear resistance and stable shaping of the seal, guaranteeing the storage reliability of vacuum packaging.

[0015] 2. This utility model ensures vacuum stability through a negative pressure protection component and a sealing rubber strip. The filter plate in the negative pressure protection component intercepts impurities to prevent wear and blockage of the vacuum pump, and the one-way valve pipe restricts airflow in one direction to avoid air backflow. The sealing rubber strip strengthens the seal between the negative pressure groove and the packaging bag and prevents displacement. It solves the problems of unstable vacuum and easy damage of traditional negative pressure systems, and ensures a continuous and stable vacuum environment inside the packaging bag, providing dual protection for sealing quality and system service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance of the present utility model;

[0017] Figure 2 This is a schematic diagram of the back of the present invention;

[0018] Figure 3 This is a schematic diagram showing the installation positions of the hot melt sealing mechanism and negative pressure protection component of this utility model;

[0019] Figure 4 This is a partial schematic diagram of the air-cooled component of this utility model;

[0020] Figure 5 This is a partial schematic diagram of the hot melt assembly of this utility model;

[0021] Figure 6 This is a partial schematic diagram of the negative pressure protection component of this utility model.

[0022] In the diagram: 1. Housing; 2. Hot melt sealing mechanism; 201. Hot melt assembly; 2011. Mounting base; 2012. Heating plate; 2013. Electric rod; 2014. Heat conduction plate; 2015. Air inlet pipe; 2016. Heat exchange tank; 2017. Negative pressure tank; 2018. Sealing rubber strip; 202. Cooling assembly; 2021. Shell; 2022. Air cooling assembly; 2023. Delivery pipe; 2024. Air pump; 3. Negative pressure protection assembly; 301. Vacuum pump; 302. Negative pressure box; 303. Filter plate; 304. One-way valve pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] refer to Figure 1-6 A vacuum packaging machine sealing mechanism includes a housing 1 and a hot melt sealing mechanism 2 for hot melt sealing and rapid cooling. The hot melt sealing mechanism 2 is composed of a hot melt component 201 and a cooling component 202.

[0025] The hot melt assembly 201 includes two sets of mounting seats 2011 fixed to one side of the housing 1. The two sets of mounting seats 2011 are located at the top and bottom of the inside of one side of the housing 1, respectively. A heating plate 2012 is embedded in the inner side of each set of mounting seats 2011. A heat-conducting plate 2014 that contacts the packaging is fixed to the bottom of the heating plate 2012. Two sets of electric rods 2013 are fixed to the top of the housing 1. Their output ends pass through the housing 1 and are fixed to the top mounting seat 2011. A heat exchange groove 2016 is opened in the heat-conducting plate 2014. An air inlet pipe 2015 and an exhaust pipe that communicate with the heat exchange groove 2016 are fixed to one side of the heat exchange groove 2014. A negative pressure groove 2017 is also opened in the inner side of the mounting seat 2011. The cooling assembly 202 includes a housing 2021 that provides the mounting position, an air-cooling assembly 2022 that cools the air inside the housing, a delivery pipe 2023 that delivers cooling air, and an air pump 2024 that delivers cold air to the air inlet pipe 2015.

[0026] The housing 2021 is fixed to the back of the box 1. The air-cooling component 2022 is fixed inside the housing 2021 and one end extends out of the housing. The delivery pipe 2023 is installed through the bottom of the housing 2021. The air pump 2024 is fixed to one side of the box 1. Its air inlet end is connected to the delivery pipe 2023, and its air outlet end is fixed with a three-way pipe. One end of the three-way pipe is connected to the air inlet pipe 2015 through a telescopic pipe.

[0027] It also includes a negative pressure protection component 3, which includes a vacuum pump 301 that provides negative pressure to the negative pressure tank 2017, a negative pressure box 302 for transferring and extracting air, a filter plate 303 for separating and intercepting impurities in the transferred air, and a one-way valve pipe 304 that restricts the one-way flow of air.

[0028] Vacuum pump 301 is fixed to one side inside the housing 1, and its air inlet end is fixed to negative pressure box 302. Filter plate 303 is fixed to negative pressure box 302. One-way valve pipe 304 is fixed to one side of negative pressure box 302 and its top end extends into mounting base 2011 and communicates with negative pressure groove 2017.

[0029] A sealing rubber strip 2018 is embedded in the inner surface of the mounting base 2011. The sealing rubber strip 2018 is located on the outside of the negative pressure groove 2017 and is used to seal the negative pressure groove 2017.

[0030] Heating plate 2012 is a carbon fiber heating plate, which is bonded to heat-conducting plate 2014 through a thermally conductive silicone grease layer.

[0031] Working principle: After the items to be packaged are put into the packaging bag, the sealing end of the packaging bag is inserted between the two sets of mounting seats 2011. At this time, the electric rod 2013 is activated. The output end of the electric rod 2013 pushes the top mounting seat 2011 downward, so that the top mounting seat 2011 and the bottom mounting seat 2011 are close to each other, and the sealing end of the packaging bag is initially clamped and positioned to ensure the stability of the bag opening position during subsequent vacuuming and sealing operations.

[0032] Then, the vacuum pump 301 is started. The vacuum pump 301 generates negative pressure, which is transmitted to the negative pressure groove 2017 inside the mounting base 2011 through the negative pressure box 302 and the one-way valve pipe 304. The negative pressure groove 2017 is attached to the outer surface of the sealing end of the packaging bag, thereby drawing the air inside the packaging bag outward and creating a vacuum environment inside the packaging bag. During this process, the materials inside the packaging bag, such as food scraps and dust, will enter the negative pressure box 302 with the airflow.

[0033] The filter plate 303 inside the negative pressure box 302 intercepts and filters these impurities, preventing them from continuing to enter the vacuum pump 301 with the airflow. This prevents the vacuum pump 301 from being damaged by wear and blockage caused by impurities, thus realizing the protective function of the negative pressure system. It solves the technical problem that impurities easily damage the vacuum pump when vacuuming traditional vacuum packaging machines. At the same time, the one-way valve pipe 304 can restrict the unidirectional flow of airflow, preventing air from flowing back into the packaging bag after vacuuming stops, thus ensuring a stable vacuum inside the packaging bag.

[0034] Restart the heating plate 2012. Because the heating plate 2012 is a carbon fiber heating plate and there is a thermally conductive silicone grease layer between it and the heat-conducting plate 2014, the heat conduction efficiency is high and uniform. The heat generated by the heating plate 2012 is quickly transferred to the sealing end of the packaging bag through the heat-conducting plate 2014, so that the packaging film at the sealing end of the packaging bag is heated and melted, and then they stick together to achieve the sealing operation.

[0035] After the sealing operation is completed, the air-cooling component 2022 and the air pump 2024 are immediately started. The air-cooling component 2022 cools the air inside the shell 2021 to form low-temperature cold air. The air pump 2024 generates suction and draws the cooled cold air from the shell 2021 through the delivery pipe 2023. Then, it is delivered to the air inlet pipe 2015 through the three-way pipe and telescopic pipe at the air outlet. The cold air enters the heat exchange tank 2016 in the heat-conducting plate 2014 through the air inlet pipe 2015 and exchanges heat with the heat-conducting plate 2014. It quickly removes the heat from the heat-conducting plate 2014 and the sealing point of the packaging bag, so that the temperature at the sealing point drops rapidly below the shaping temperature of the packaging film. This process realizes the rapid cooling function after sealing, avoiding the sealing failure problem caused by the sealing point loosening before shaping due to excessive temperature during traditional natural cooling. It solves the technical problems of low efficiency and unstable sealing quality of natural cooling, while improving the shaping effect and tear resistance of the packaging bag sealing and extending the storage period of the packaging.

[0036] The sealing rubber strip 2018 on the inner surface of the mounting base 2011 can increase the sealing between the negative pressure groove 2017 and the outer surface of the packaging bag, preventing air from seeping in from the gap between the negative pressure groove 2017 and the bag body during vacuuming. At the same time, the sealing rubber strip 2018 can also increase the friction between the negative pressure groove 2017 and the packaging bag, preventing the packaging bag from shifting due to negative pressure adsorption during vacuuming, ensuring that the negative pressure groove 2017 is always aligned with the bag opening, and ensuring stable vacuuming effect.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism for a vacuum packaging machine, comprising a housing (1), characterized in that: It also includes a heat-melting sealing mechanism (2) for heat-melting sealing and rapid cooling, the heat-melting sealing mechanism (2) consisting of a heat-melting component (201) and a cooling component (202); The hot melt assembly (201) includes two sets of mounting bases (2011) fixed to one side of the box (1). The two sets of mounting bases (2011) are located at the top and bottom of the inside of one side of the box (1), respectively. A heating plate (2012) is embedded in the inner side of each set of mounting bases (2011). A heat-conducting plate (2014) that contacts the packaging is fixed to the bottom of the heating plate (2012). Two sets of electric rods (2013) are fixed to the top of the box (1), and their output ends pass through the box (1) and are fixed to the top mounting bases (2011). The heat-conducting plate (2014) has a heat exchange groove (2016) inside, and an air inlet pipe (2015) and an exhaust pipe that communicate with the heat exchange groove (2016) are fixedly connected to one side. The mounting base (2011) also has a negative pressure groove (2017) inside. The cooling component (202) includes a housing (2021) that provides the mounting position, an air-cooling component (2022) that cools the air inside the housing, a conveying pipe (2023) that conveys cooling air, and an air pump (2024) that delivers cold air to the air inlet pipe (2015).

2. The sealing mechanism of the vacuum packaging machine according to claim 1, characterized in that: The housing (2021) is fixed to the back of the box (1), the air-cooling component (2022) is fixed inside the housing (2021) and one end extends out of the housing, the delivery pipe (2023) is installed through the bottom of the housing (2021), the air pump (2024) is fixed to one side of the box (1), its air inlet end is connected to the delivery pipe (2023), and its air outlet end is fixed with a three-way pipe. One end of the three-way pipe is connected to the air inlet pipe (2015) through a telescopic pipe.

3. The sealing mechanism of the vacuum packaging machine according to claim 1, characterized in that: It also includes a negative pressure protection component (3), which includes a vacuum pump (301) that provides negative pressure to the negative pressure tank (2017), a negative pressure box (302) for transferring and extracting air, a filter plate (303) for separating and intercepting impurities in the transferred air, and a one-way valve pipe (304) that restricts the one-way flow of air.

4. The sealing mechanism of the vacuum packaging machine according to claim 3, characterized in that: The vacuum pump (301) is fixed to one side inside the housing (1), and its air inlet end is fixed to a negative pressure box (302). The filter plate (303) is fixed inside the negative pressure box (302), and the one-way valve pipe (304) is fixed to one side of the negative pressure box (302) and its top extends into the mounting base (2011) and communicates with the negative pressure groove (2017).

5. The sealing mechanism of the vacuum packaging machine according to claim 1, characterized in that: A sealing rubber strip (2018) is embedded in the inner surface of the mounting base (2011). The sealing rubber strip (2018) is located outside the negative pressure groove (2017) and is used to seal the negative pressure groove (2017).

6. The sealing mechanism of the vacuum packaging machine according to claim 1, characterized in that: The heating plate (2012) is a carbon fiber heating plate, which is bonded to the heat-conducting plate (2014) through a thermally conductive silicone grease layer.

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