Packaging bag production device

Abstract

A packaging bag production device is used for thermally cutting and sealing a plastic film to form a packaging bag and comprises a base, a side plate fixedly connected to the base and a fixing part fixedly connected to the side plate. The hot cutting part is fixedly connected to the fixing part, and the hot cutting part is provided with a hot cutter and is electrically connected with a temperature regulator; the cold cutting part is fixedly connected to the base, is observed in the direction perpendicular to the surface of the side plate and is located between the hot cutting part and the base, and the cold cutting part is provided with a cold cutter and is also electrically connected with a temperature regulator; wherein the two thermosistors are used for heating the hot cutter and cooling the cold cutter respectively, the hot cutting part drives the hot cutter to move in the first direction parallel to the surface of the side plate, and when the hot cutter abuts against the cold cutter, the plastic film is cut.

Description

Technical Field

[0001] This utility model relates to the field of automated production, and in particular to a packaging bag production device. Background Technology

[0002] Packaging bag heat-cutting machines are widely used equipment in the packaging industry. Their main function is to cut and seal plastic film using heated cutting blades, thereby producing packaging bags of various sizes and shapes. These packaging bags are widely used in clothing, food, stationery, electrical appliances, and many other fields, providing great convenience for product packaging and transportation.

[0003] Currently, most hot-cutting machines for packaging bags use a single-sided hot-cutting blade design. While this design meets basic cutting and sealing requirements to some extent, it also exposes a series of drawbacks. First, during the cutting process, the single-sided hot-cutting blade heats only one side of the material, resulting in uneven heat distribution and easily causing unevenness, burrs, or cracks at the cut edges. This not only affects the aesthetics of the packaging bag but may also reduce its sealing performance and durability. Second, the single-sided hot-cutting blade design limits cutting speed and production efficiency. Because the material must cool down before the next cut can be made, the entire cutting process becomes cumbersome and time-consuming.

[0004] Therefore, it is necessary to provide a packaging bag production apparatus that can improve cutting efficiency and the smoothness of the cut edges. Utility Model Content

[0005] The purpose of this invention is to provide a packaging bag production device that can improve cutting efficiency and the smoothness of the cut edges.

[0006] According to one aspect of this application, a packaging bag production apparatus is provided for thermally cutting and sealing a plastic film to form a packaging bag, the apparatus comprising:

[0007] Base

[0008] A side plate is fixedly connected to the base, and the side plate is fixedly connected to a fixing part;

[0009] A hot-cutting part is fixedly connected to the fixed part. The hot-cutting part is equipped with a hot-cutting blade and is electrically connected to a temperature controller.

[0010] The cold cutting section is fixedly connected to the base and, when viewed in a direction perpendicular to the surface of the side plate, is located between the hot cutting section and the base. The cold cutting section is equipped with a cold cutting blade and is also electrically connected to a temperature controller.

[0011] The two temperature controllers heat the hot cutting blade and cool the cold cutting blade respectively. The hot cutting part drives the hot cutting blade to move in a first direction parallel to the surface of the side plate, and when the hot cutting blade comes into contact with the cold cutting blade, it cuts the plastic film.

[0012] More preferably, the device further includes:

[0013] The bracket is fixedly connected to the base;

[0014] The transport section is fixedly connected to the bracket and located on the side of the bracket away from the base.

[0015] More preferably, the plastic film is placed on the surface of the transport section opposite to the support, and the transport section conveys the plastic film to the cold-cutting section in a second direction parallel to the surface of the base.

[0016] More preferably, the device further includes:

[0017] The feeding section is fixedly connected to the base and is located on the side of the cold cutting section away from the bracket;

[0018] When the hot cutting blade and the cold cutting blade abut against and cut the plastic film located on the side of the cold cutting blade away from the base, the packaging bag slides down the feeding section to the base.

[0019] More preferably, the hot-cut portion further includes:

[0020] The pneumatic part is fixedly connected to the fixed part;

[0021] The heating element is fixedly connected to the pneumatic element and is located between the hot cutting blade and the pneumatic element.

[0022] The heating element is fixedly connected to the hot cutting blade and electrically connected to it.

[0023] More preferably, the pneumatic part includes:

[0024] The push rod is slidably connected to the pneumatic part;

[0025] The push block is fixedly connected to the push rod;

[0026] The push block is fixedly connected to the heating element, and the push rod pushes the heating element and the hot cutting blade to move along the first direction via the push block.

[0027] More preferably, the cold-cutting section further includes an electric cooling section, which is fixedly connected to the base and located between the cold-cutting blade and the base;

[0028] The electrocooling unit is fixedly connected to the cold cutting blade and is electrically connected to the cold cutting blade.

[0029] More preferably, the temperature controller consists of an electric rod and a power supply line, wherein the electric rod is fixedly connected to the power supply line and is electrically connected to the power supply line;

[0030] The two electric rods are respectively embedded in the heating part and the cooling part along the first direction, and are electrically connected to the heating part and the cooling part respectively.

[0031] More preferably, the device further includes a power supply unit, wherein the power supply pipeline extends along the second direction and is fixedly connected to the power supply unit and electrically connected to the power supply unit.

[0032] More preferably, the materials of the hot cutting blade and the cold cutting blade are formed by a combination of one or more of alloy steel, cemented carbide, Teflon and high-speed steel.

[0033] This utility model has the following beneficial effects:

[0034] By heating the hot cutting blade and cooling the cold cutting blade with two temperature controllers, the hot cutting unit drives the hot cutting blade to cut the plastic film, enabling one side to be hot-cut while the other side is rapidly cooled, thus improving the cutting efficiency of the packaging bag production device. Furthermore, by employing the hot cutting unit to drive the hot cutting blade along the first direction, and by having the hot cutting blade abut against the cold cutting blade to cut the plastic film, the plastic film is softened by the hot cutting blade first, dispersing the stress on the surface of the plastic film during cutting, reducing the shear strength of the plastic film, and improving the smoothness of the cut edge. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of the device described in one embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the planar structure of the device described in one embodiment of this application;

[0038] Figure 3 This is a schematic diagram illustrating the three-dimensional structure principle of the device described in one embodiment of this application for cutting the plastic film;

[0039] Figure 4 This is a three-dimensional structural diagram of the temperature controller in the device described in one embodiment of this application;

[0040] Explanation of reference numerals: 100, Device; 10, Base; 20, Side plate; 21, Fixing part; 30, Hot cutting part; 31, Hot cutting knife; 32, Pneumatic part; 32A, Push rod; 32B, Push block; 33, Heating part; 40, Cold cutting part; 41, Cold cutting knife; 42, Electric cooling part; 50, Temperature controller; 51, Electric rod; 52, Power supply pipeline; 60, Support; 70, Transport part; 80, Unloading part; 90, Power supply part; 200, Plastic film; 300, Packaging bag; F1, First direction; F2, Second direction. Detailed Implementation

[0041] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0042] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Please refer to Figure 1 - Figure 4 One embodiment of this application provides a packaging bag 300 production apparatus 100 for thermally cutting and sealing a plastic film 200 to form a packaging bag 300. The apparatus 100 includes: a base 10, a side plate 20, a thermal cutting section 30, and a cold cutting section 40.

[0045] The side plate 20 is fixedly connected to the base 10, and a fixing part 21 is fixedly connected to the side plate 20. The hot-cutting part 30 is fixedly connected to the fixing part 21, and the hot-cutting part 30 is provided with a hot-cutting blade 31 and electrically connected to a temperature controller 50. The cold-cutting part 40 is fixedly connected to the base 10 and, when viewed in a direction perpendicular to the surface of the side plate 20, is located between the hot-cutting part 30 and the base 10. The cold-cutting part 40 is provided with a cold-cutting blade 41 and is also electrically connected to a temperature controller 50. The two temperature controllers 50 respectively heat the hot-cutting blade 31 and cool the cold-cutting blade 41. The hot-cutting part 30 drives the hot-cutting blade 31 to move in a first direction F1 parallel to the surface of the side plate 20, and when the hot-cutting blade 31 abuts against the cold-cutting blade 41, it cuts the plastic film 200.

[0046] The arrangement of the hot-cutting section 30 and the cold-cutting section 40 ensures smooth operation of the plastic film 200 during the hot cutting and sealing process. The hot-cutting section 30 softens the plastic film 200 by heating the hot-cutting blade 31, making it easier to cut. The cold-cutting section 40 cools the cut edge rapidly after the hot-cutting blade 31 cuts, achieving a sealing effect. The hot-cutting blade 31 moves along a first direction F1 parallel to the surface of the side plate 20, cutting the plastic film 200 upon contact with the cold-cutting blade 41. This arrangement allows for continuous and stable cutting and sealing operations, improving production efficiency. The hot-cutting section 30 and the cold-cutting section 40 are each electrically connected to a temperature controller 50, which can heat the hot-cutting blade 31 and cool the cold-cutting blade 41 respectively. This arrangement ensures that the hot-cutting blade 31 and the cold-cutting blade 41 maintain a constant temperature during operation, thereby guaranteeing the quality of cutting and sealing. Precise temperature control can also prevent damage to the plastic film 200 caused by overheating or overcooling, improving the product qualification rate. The side plate 20 is fixedly connected to the base 10, and the fixing part 21 is also fixedly connected to the side plate 20. This arrangement makes the entire device 100 more compact and stable. The hot-cutting part 30 and the cold-cutting part 40 are respectively fixedly connected to the fixing part 21 and the base 10, ensuring their stability and reliability during operation. By adjusting the temperature setting of the thermostat 50, the cutting and sealing requirements of plastic films 200 of different materials and thicknesses can be met. The device 100 can also be equipped with other auxiliary components, such as the bracket 60, the transport part 70, and the unloading part 80, to improve production efficiency and automation.

[0047] More preferably, the device 100 further includes a support 60 and a transport section 70.

[0048] The bracket 60 is fixedly connected to the base 10. The transport part 70 is fixedly connected to the bracket 60 and is located on the side of the bracket 60 opposite to the base 10.

[0049] The support bracket 60 is fixedly connected to the base 10, providing a stable support platform for the transport section 70. This arrangement makes the entire device 100 more compact in the vertical direction, effectively utilizing space. The transport section 70 is located on the side of the support bracket 60 away from the base 10, avoiding direct interference with the hot-cutting section 30 and the cold-cutting section 40, ensuring smooth cutting and sealing processes. As the supporting structure for the transport section 70, the stability of the support bracket 60 is crucial for the stable operation of the entire device 100. Through careful design and manufacturing, the support bracket 60 provides sufficient rigidity and strength to support the transport section 70 and the plastic film 200 it carries. This arrangement also helps reduce errors caused by vibration or impact, improving the accuracy of cutting and sealing. The transport section 70 is located on top of the support bracket 60, making it easier for operators to place and remove the plastic film 200 and monitor the cutting and sealing process. Furthermore, this arrangement provides better accessibility when maintenance or replacement of the transport section 70 is required, reducing maintenance difficulty and costs. The transport section 70 continuously and stably conveys the plastic film 200 to the cutting area, ensuring the continuity and efficiency of the production process. By precisely controlling the speed and position of the transport section 70, accurate synchronization with the hot-cutting section 30 and the cold-cutting section 40 can be achieved, further improving the efficiency and quality of cutting and sealing. This configuration allows the device 100 to accommodate plastic films 200 of different sizes and types. By adjusting parameters such as the width, speed, and position of the transport section 70, different production needs can be easily met. Furthermore, as production scale expands or production demands change, additional transport sections 70 or other auxiliary components can be added to the existing device 100 to meet a wider range of production requirements.

[0050] More preferably, the plastic film 200 is placed on the surface of the transport section 70 opposite to the support 60, and the transport section 70 transports the plastic film 200 to the cold cutting section 40 along a second direction F2 parallel to the surface of the base 10.

[0051] The arrangement of the transport section 70 ensures continuous and stable transport of the plastic film 200 during cutting and sealing, avoiding cutting errors or poor sealing caused by unstable transport. This arrangement also improves production efficiency, as the plastic film 200 can be quickly transported to the cutting area and the cutting and sealing process is completed rapidly. Positioning the transport section 70 on the side of the support 60 away from the base 10 fully utilizes the space of the device 100, avoiding direct interference with the hot cutting section 30 and the cold cutting section 40. This layout also makes the entire device 100 more compact and rational, facilitating operation and maintenance. The transport section 70 allows operators to more easily place and remove the plastic film 200, and monitor the cutting and sealing process. Furthermore, the arrangement of the transport section 70 reduces the risk of direct contact between operators and the hot cutting section 30 and the cold cutting section 40, improving operational safety. This arrangement allows the device 100 to accommodate plastic films 200 of different sizes and types. By adjusting parameters such as the width, speed, and position of the transport unit 70, different production needs can be easily adapted.

[0052] More preferably, the device 100 further includes a feeding section 80.

[0053] The feeding section 80 is fixedly connected to the base 10 and is located on the side of the cold cutting section 40 away from the bracket 60. When the hot cutting blade 31 and the cold cutting blade 41 abut against and cut the plastic film 200 located on the side of the cold cutting blade 41 away from the base 10, the packaging bag 300 slides down the feeding section 80 to the base 10.

[0054] In this design, when the hot-cutting blade 31 and the cold-cutting blade 41 abut and cut the plastic film 200 located on the side of the cold-cutting blade 41 away from the base 10, the resulting packaging bag 300 can automatically slide down the unloading section 80 to the base 10. This design realizes the entire automated production process from conveying, cutting, sealing to unloading of the plastic film 200, reducing manual intervention and improving production efficiency. The unloading section 80 is located on the side of the cold-cutting section 40 away from the support 60. This layout avoids direct interference with the hot-cutting section 30, the cold-cutting section 40, and the transport section 70, ensuring spatial coordination between the various components. At the same time, it also makes the structure of the entire device 100 more compact, with a smaller footprint, which is beneficial for saving production costs and space resources. Through the setting of the unloading section 80, the packaging bag 300 can slide down to the base 10 smoothly and orderly, avoiding problems such as deformation, damage, or contamination of the packaging bag 300 caused by manual material handling. This design helps to improve the production quality and pass rate of products. Meanwhile, the unloading section 80 slides the cut packaging bags 300 directly onto the base 10, facilitating subsequent collection, sorting, and packaging processes. Operators can more easily process the packaging bags 300, improving the overall efficiency and flexibility of the production line.

[0055] More preferably, the heat-cutting part 30 further includes a pneumatic part 32 and an electric heating part 33.

[0056] The pneumatic unit 32 is fixedly connected to the fixed part 21. The electric heating unit 33 is fixedly connected to the pneumatic unit 32 and is located between the hot cutting blade 31 and the pneumatic unit 32. The electric heating unit 33 is fixedly connected to the hot cutting blade 31 and is electrically connected to the hot cutting blade 31.

[0057] The heating element 33 is fixedly connected to and electrically connected to the hot cutting blade 31, providing the heat required for cutting. Through the heating effect of the heating element 33, the hot cutting blade 31 can quickly heat up to the appropriate cutting temperature, thereby achieving thermal cutting of the plastic film 200. The pneumatic element 32 is fixedly connected to the fixing part 21 and indirectly drives the movement of the hot cutting blade 31 through its connection with the heating element 33. The pneumatic element 32 includes pneumatic components such as a cylinder, speed control valve, and directional valve, providing stable and controllable cutting power. This arrangement ensures the stability and accuracy of the hot cutting blade 31 during the cutting process. Placing the heating element 33 between the pneumatic element 32 and the hot cutting blade 31 allows for more efficient utilization of thermal energy. The heating element 33 can quickly heat the hot cutting blade 31, while the pneumatic element 32 can quickly respond and execute the cutting action. This combination improves the efficiency and quality of thermal cutting, ensuring the flatness of the cut surface and the sealing effect. Integrating the heating element 33 and the pneumatic element 32 as components of the hot-cutting unit 30, and fixing them respectively between the fixing part 21 and the hot-cutting blade 31, makes the connections between the various components clearer and more defined. This not only facilitates daily maintenance and upkeep but also improves the flexibility and scalability of the device 100. For example, when the cutting temperature needs to be adjusted, it can be achieved by adjusting the parameters of the heating element 33. When the cutting speed needs to be adjusted, it can be achieved by adjusting the parameters of the pneumatic element 32. Separating the heating element 33 and the pneumatic element 32 and fixing them to different components reduces safety risks during operation. For example, the heating element 33 may generate high temperatures during heating, while the pneumatic element 32 provides power without directly contacting the high-temperature components. This design helps reduce safety accidents caused by improper operation or equipment malfunction.

[0058] More preferably, the pneumatic unit 32 includes a push rod 32A and a push block 32B.

[0059] The push rod 32A is slidably connected to the pneumatic part 32. The push block 32B is fixedly connected to the push rod 32A. The push block 32B is fixedly connected to the heating part 33, and the push rod 32A pushes the heating part 33 and the hot cutting blade 31 to move along the first direction F1 via the push block 32B.

[0060] The sliding connection design of the push rod 32A within the pneumatic unit 32 allows it to move smoothly and controllably in a specific direction (i.e., the first direction F1). This design ensures precise position control of the heating element 33 and the hot cutting blade 31 during the cutting process, thereby improving cutting accuracy and stability. As the output element of the pneumatic unit 32, the push rod 32A transmits the power generated by the pneumatic unit 32 to the heating element 33 and the hot cutting blade 31 through its sliding motion. This design makes the cutting power more stable and reliable, and allows for adjustment according to actual needs. Simultaneously, the sliding connection of the push rod 32A reduces energy loss due to friction, improving energy utilization efficiency. The push block 32B is fixedly connected to the push rod 32A and further fixedly connected to the heating element 33, making the entire pneumatic unit 32 structure more compact and rational. The presence of the push block 32B not only enhances the connection stability between the push rod 32A and the heating element 33 but also makes the overall layout of the device 100 simpler and clearer. The sliding connection of push rod 32A and the fixed connection of push block 32B enable rapid and smooth movement of the heating element 33 and the hot cutting blade 31. This design improves cutting efficiency, shortens the cutting cycle, and thus increases the overall production capacity of the packaging bag 300 production unit 100.

[0061] More preferably, the cold-cutting section 40 further includes an electro-cooling section 42, which is fixedly connected to the base 10 and located between the cold-cutting blade 41 and the base 10. The electro-cooling section 42 is fixedly connected to the cold-cutting blade 41 and electrically connected to the cold-cutting blade 41.

[0062] The primary function of the electrocooling section 42 is to provide cooling, reducing the heat generated by the cold-cutting blade 41 during the cutting process. The cooling effect of the electrocooling section 42 ensures that the cold-cutting blade 41 maintains an appropriate temperature, thereby extending its service life and improving cutting quality. In the cutting of packaging materials such as plastic bags, cold-cutting technology requires a smooth, burr-free cut surface. The electrocooling section 42 helps reduce heat accumulation during the cutting process, preventing the plastic material from melting or deforming due to high temperatures, thus ensuring the quality of the cut surface. The electrocooling section 42, fixedly connected between the base 10 and the cold-cutting blade 41, forms a stable cooling system. This design ensures the stability of the cold-cutting blade 41 during the cutting process and reduces cutting errors caused by temperature changes. The cooling effect of the electrocooling section 42 ensures that the cold-cutting blade 41 maintains optimal working condition during long-term continuous cutting. This helps improve production efficiency and reduce time losses due to equipment failure or downtime for maintenance.

[0063] More preferably, the temperature controller 50 consists of an electric rod 51 and a power supply line 52. The electric rod 51 is fixedly connected to the power supply line 52 and electrically connected to it. The two electric rods 51 are respectively embedded in the heating part 33 and the cooling part 42 along the first direction F1, and are electrically connected to the heating part 33 and the cooling part 42 respectively.

[0064] The electric rod 51, acting as a heating or cooling element, can quickly respond to temperature changes and precisely control the temperature of the heating element 33 and the cooling element 42. By adjusting the power or current of the electric rod 51, precise temperature regulation can be achieved to meet the different temperature requirements during the production process of the packaging bag 300. The direct electrical connection between the electric rod 51 and the power supply line 52 reduces energy loss during the transfer process and improves energy utilization efficiency. Simultaneously, because the electric rod 51 is embedded within the heating element 33 and the cooling element 42, heat transfer is more direct and efficient, reducing heat loss. Fixing the electric rod 51 to the power supply line 52 and embedding it within the heating element 33 and the cooling element 42 makes the entire temperature controller 50 more compact and efficient. This design not only reduces the floor space but also facilitates daily inspection, maintenance, and upkeep. Precise temperature control ensures that the heating element 33 and the cooling element 42 maintain optimal operating conditions throughout the production process of the packaging bag 300. This helps improve production efficiency and reduce production failures and product defects caused by temperature fluctuations. At the same time, stable temperature control can also ensure the quality of the cut surface and improve the overall quality of the product.

[0065] More preferably, the device 100 further includes a power supply unit 90, wherein the power supply pipeline 52 extends along the second direction F2 and is fixedly connected to the power supply unit 90 and electrically connected to the power supply unit 90.

[0066] The power supply unit 90, as the power source for the entire device 100, needs to ensure a stable power supply. By fixing the power supply pipeline 52 to the power supply unit 90 and electrically connecting it, a stable and reliable power transmission system can be formed, ensuring a continuous power supply for key components such as the electric heating unit 33 and the electric cooling unit 42. The extension of the power supply pipeline 52 can be optimized according to the actual layout of the device 100 and the power demand. By rationally arranging the power supply pipeline 52, the power transmission distance can be shortened, power loss reduced, and power transmission efficiency improved. Fixing the power supply pipeline 52 to the power supply unit 90 and extending it in a certain direction makes the entire power transmission system clearer and more intuitive. This facilitates daily inspection, maintenance, and repair work, reducing maintenance costs and time. A stable power supply and optimized power transmission path can improve the safety and reliability of the entire device 100. During the production of packaging bags 300, power failures or fluctuations can seriously affect product quality and production efficiency. By optimizing the power transmission system, the possibility of failures can be reduced, improving the stability and reliability of the device 100.

[0067] More preferably, the hot cutting blade 31 and the cold cutting blade 41 are made of a combination of one or more of alloy steel, cemented carbide, Teflon and high-speed steel.

[0068] For the hot-cutting blade 31, alloy steel possesses high heat resistance (300 to 400 degrees Celsius), maintaining hardness and wear resistance under certain high-temperature environments, making it suitable for hot-cutting processes. Alloy steel also exhibits certain toughness and good hardenability, meeting the impact and vibration resistance requirements of the hot-cutting blade 31 during cutting. Carbide, made from hard compounds of refractory metals and binder metals through powder metallurgy, possesses extremely high hardness and wear resistance. Carbide exhibits excellent heat resistance, maintaining cutting capability at cutting temperatures as high as 850 to 1000 degrees Celsius, making it ideal for the hot-cutting blade 31 in high-temperature environments. Teflon is commonly used as a coating for cutting tools. Teflon coatings possess excellent non-stick properties, heat resistance, and low-temperature resistance, and can withstand temperatures up to 300 degrees Celsius for short periods. The coating prevents the blade from sticking during hot cutting, improving cutting efficiency and product quality. High-speed steel possesses high hardness and wear resistance, as well as good heat resistance, maintaining its room-temperature hardness and wear resistance even at cutting temperatures of 500 to 600 degrees Celsius. It also exhibits high bending strength and good impact toughness, enabling the production of sharp cutting edges, making it suitable for precision-critical cutting operations.

[0069] For the cold-cutting blade 41, alloy steel is suitable for cutting materials at room temperature. Carbide also possesses extremely high hardness and wear resistance at room temperature, meeting the hardness and wear resistance requirements of the cold-cutting blade 41. Due to the extremely high hardness of carbide, the cold-cutting blade 41 made from it can maintain the sharpness of the cutting edge during the cutting process, improving cutting efficiency. High-speed steel also possesses high hardness and wear resistance at room temperature, making it suitable for manufacturing the cold-cutting blade 41. High-speed steel also has good toughness and bending strength, meeting the impact and vibration resistance requirements of the cold-cutting blade 41 during the cutting process.

[0070] By using the two temperature controllers 50 to heat the hot cutting blade 31 and cool the cold cutting blade 41 respectively, the hot cutting section 30 drives the hot cutting blade 31 to cut the plastic film 200, enabling one side to be hot-cut while the other side is cooled more quickly, thus improving the cutting efficiency of the packaging bag 300 production device 100. Furthermore, by using the hot cutting section 30 to drive the hot cutting blade 31 to move along the first direction F1, and by having the hot cutting blade 31 abut against the cold cutting blade 41 when cutting the plastic film 200, the plastic film 200 is softened by the hot cutting blade 31 first, dispersing the stress on the surface of the plastic film 200 during cutting, reducing the shear strength of the plastic film 200, and improving the smoothness of the cut edge.

[0071] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A packaging bag production apparatus for thermally cutting and sealing a plastic film to form a packaging bag, characterized in that, The device includes: Base A side plate is fixedly connected to the base, and the side plate is fixedly connected to a fixing part; A hot-cutting part is fixedly connected to the fixed part. The hot-cutting part is equipped with a hot-cutting blade and is electrically connected to a temperature controller. The cold cutting section is fixedly connected to the base and, when viewed in a direction perpendicular to the surface of the side plate, is located between the hot cutting section and the base. The cold cutting section is equipped with a cold cutting blade and is also electrically connected to a temperature controller. The two temperature controllers heat the hot cutting blade and cool the cold cutting blade respectively. The hot cutting part drives the hot cutting blade to move in a first direction parallel to the surface of the side plate, and when the hot cutting blade comes into contact with the cold cutting blade, it cuts the plastic film.

2. The apparatus according to claim 1, wherein The device further includes: The bracket is fixedly connected to the base; The transport section is fixedly connected to the bracket and located on the side of the bracket away from the base.

3. A bag making apparatus as claimed in claim 2, wherein The plastic film is placed on the surface of the transport section opposite to the support, and the transport section conveys the plastic film to the cold cutting section in a second direction parallel to the surface of the base.

4. The apparatus of claim 3, wherein The device further includes: The feeding section is fixedly connected to the base and is located on the side of the cold cutting section away from the bracket; When the hot cutting blade and the cold cutting blade abut against and cut the plastic film located on the side of the cold cutting blade away from the base, the packaging bag slides down the feeding section to the base.

5. The apparatus of claim 3, wherein The heat-cutting section also includes: The pneumatic part is fixedly connected to the fixed part; The heating element is fixedly connected to the pneumatic element and is located between the hot cutting blade and the pneumatic element; The heating element is fixedly connected to the hot cutting blade and electrically connected to it.

6. A packaging bag production apparatus according to claim 5, wherein The pneumatic unit includes: The push rod is slidably connected to the pneumatic part; The push block is fixedly connected to the push rod; The push block is fixedly connected to the heating element, and the push rod pushes the heating element and the hot cutting blade to move along the first direction via the push block.

7. The apparatus of claim 5, wherein The cold cutting section further includes an electric cooling section, which is fixedly connected to the base and located between the cold cutting blade and the base; The electrocooling unit is fixedly connected to the cold cutting blade and is electrically connected to the cold cutting blade.

8. The apparatus of claim 7, wherein The temperature controller consists of an electric rod and a power supply line. The electric rod is fixedly connected to the power supply line and is electrically connected to the power supply line. The two electric rods are respectively embedded in the heating part and the cooling part along the first direction, and are electrically connected to the heating part and the cooling part respectively.

9. A package production apparatus according to claim 8, wherein The device also includes a power supply unit, the power supply pipeline extends along the second direction, and the power supply pipeline is fixedly connected to the power supply unit and electrically connected to the power supply unit.

10. The apparatus of claim 1, wherein The hot cutting blade and the cold cutting blade are respectively made of a combination of one or more of alloy steel, cemented carbide, Teflon and high-speed steel.

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