A blowing film device for producing antibacterial food packaging bags

Abstract

The utility model discloses an antibacterial food packaging bag production film blowing device, include: bottom plate, be provided with feeding assembly on the bottom plate, one side cooperation of feeding assembly is provided with die head subassembly, both sides of die head subassembly are provided with the supporting plate, and the lower extreme of supporting plate is fixedly connected with bottom plate, the interval is provided with two groups of air ring subassembly on the supporting plate, and air ring subassembly all are located the top of die head subassembly, be provided with first protective cover between air ring subassembly, be provided with second protective cover between air ring subassembly and die head subassembly, the upper portion fixed connection of supporting plate has the herringbone squeegee, and the herringbone squeegee is located the top of air ring subassembly, and the top of supporting plate is provided with one group of extruding roller, and one side cooperation of extruding roller is provided with one group of guide roller, through the setting of first protective cover, second protective cover, can play the role of isolation and protection, guarantee the cleanliness of film, the protective cover still can reduce the interference of outside airflow to the bubble cooling process of film, improve the stability of cooling effect and film quality.

Description

Technical Field

[0001] This utility model belongs to the field of packaging bag production technology, and specifically relates to a blown film production device for antibacterial food packaging bags. Background Technology

[0002] A blown film extrusion device for food packaging bags is a piece of equipment used to produce the film materials needed for food packaging bags. Its main function is to heat, plasticize, and extrude plastic granules or granular raw materials into a film, and then process it into a film of the required specifications and thickness through cooling, stretching, and winding processes for use in making food packaging bags. Blown film extrusion devices, also known as blown film machines, are used in the production and processing of plastic packaging bags with unique sealing and lightweight properties. Common blown film extrusion devices mainly consist of components such as an extruder, die head, die head, cooling device, bubble stabilizer, herringbone plate, traction roller, and winding device. Specifically, Chinese utility model patent application number CN202321229308.4 discloses a blown film device for packaging bags, including a support frame. The support frame has a blown film mold body located in its lower center, and an upper bracket fixedly installed in its upper center. A turntable is rotatably mounted on one side of the bottom of the upper bracket, and a sleeve is fixedly connected to the bottom of the turntable. A guide ring plate is fixedly connected to one side of the sleeve. In this utility model, through the arrangement of the guide ring plate, turntable, guide ring plate, sleeve, motor, mold body, and upper bracket, when multiple guide ring plates perform low-speed rotary operation, the multiple guide ring plates, which can change the direction of the lateral wind, weaken the lateral wind blowing directly onto the film product through the uniform action of the first and second air holes. This prevents the film product, affected by the lateral wind, from adhering to the traction components due to residual heat during the upward pulling process.

[0003] However, this blown film device has certain limitations in protecting the film products; its protection is not comprehensive enough, and there is still a risk that crosswinds outside the equipment will wrinkle the film just extruded from the die. Therefore, this application provides a blown film device for producing antibacterial food packaging bags, aiming to improve the surface quality of the film. Utility Model Content

[0004] This invention provides a blown film production device for antibacterial food packaging bags, aiming to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An antibacterial food packaging bag blowing film production device includes: a base plate, a feeding assembly on the base plate, a die head assembly on one side of the feeding assembly, support plates on both sides of the die head assembly, and the lower end of the support plate being fixedly connected to the base plate; Two sets of air ring assemblies are spaced apart on the support plate. The air ring assemblies are all located above the die head assembly. A first protective cover is provided between the air ring assemblies. A second protective cover is provided between the air ring assemblies and the die head assembly. A herringbone wiping plate is fixedly connected to the upper part of the support plate. The herringbone wiping plate is located above the air ring assemblies. A set of extrusion rollers is provided on the top of the support plate. A set of guide rollers is provided on one side of the extrusion rollers.

[0006] Furthermore, the first protective cover is fixedly connected to the upper and lower sides respectively with a first connecting ring, and the first connecting ring is bolted to the adjacent air ring assembly.

[0007] Furthermore, a second connecting ring is provided on the upper side of the second protective cover, and a third connecting ring is provided on the lower side. The second connecting ring is bolted to the adjacent air ring assembly, and a snap-fit ​​ring is bolted to the lower part of the third connecting ring. The third connecting ring and the snap-fit ​​ring cooperate to snap onto the outer edge of the mold head assembly.

[0008] Furthermore, the air ring assembly includes: two mounting plates fixedly connected to the support plate, an air guide ring fixedly connected between the mounting plates, an air guide ring groove provided inside the air guide ring, an air pipe connector communicating with the air guide ring groove at the lower part of the air guide ring, an air outlet ring provided on the inner side wall of the air guide ring, a plurality of air outlet holes evenly spaced on the inner side wall of the air outlet ring, the bottom of the air outlet holes communicating with the air guide ring groove through a connecting flow channel, and an adjustment component provided at the bottom of the air outlet holes for balancing the air velocity of each air outlet hole.

[0009] Furthermore, the adjustment assembly includes: an adjustment bolt threaded to the bottom of the air outlet, a piston plate sleeved on the adjustment bolt, and a spring disposed between the piston plate and the end of the adjustment bolt, the piston plate and the spring cooperating to block the connecting flow channel.

[0010] Furthermore, the air outlet is frustum-shaped, and a baffle is provided on the annular sidewall of the air outlet.

[0011] Furthermore, an air outlet duct is provided in the middle of the upper surface of the mold head assembly.

[0012] Furthermore, the feeding assembly includes: an extruder and a drive motor fixedly connected to the base plate, the drive motor and the extruder transmitting power through a pulley assembly, one end of the extruder cooperating with the die head assembly through a feeding box, and a feeding hopper provided on the upper part of the extruder.

[0013] Compared with the prior art, the present invention has the following technical effects: 1. The blown film production device for antibacterial food packaging bags of this utility model has a first protective cover set between two sets of air ring assemblies, and a second protective cover set between the air ring assembly and the die head assembly. These can play a role in isolation and protection, preventing external dust, debris and other objects from entering the film bubble area, ensuring the cleanliness of the film and meeting the hygiene requirements of antibacterial food packaging bags. The protective cover can also reduce the interference of external airflow on the film bubble cooling process, so that the cooling air blown out by the air ring can act more effectively on the film bubble, improving the cooling effect and the stability of film quality.

[0014] 2. The blown film production device for antibacterial food packaging bags described in this utility model uses two sets of spaced-apart air ring assemblies located above the die head assembly. These air rings can cool the high-temperature film bubbles extruded from the die head. The air rings can evenly blow cooling air onto the surface of the film bubbles, allowing them to cool and solidify rapidly, thus improving film production efficiency. Furthermore, the air rings at different positions can provide targeted cooling based on the different states of the film bubbles. The air rings closer to the die head can provide initial cooling of the freshly extruded high-temperature film bubbles, while the upper air rings can further cool and stabilize the shape of the film bubbles, contributing to improved physical properties and appearance quality of the film. Attached Figure Description

[0015] Figure 1 This is a front view of a blown film production device for antibacterial food packaging bags according to this utility model; Figure 2 This is a cross-sectional view of the air ring assembly and protective cover of the blown film production device for antibacterial food packaging bags according to this utility model; Figure 3 This is a cross-sectional view of the air ring assembly of a blown film production device for antibacterial food packaging bags according to this utility model; Figure 4 This is a schematic diagram of the adjustment components of a blown film production device for antibacterial food packaging bags according to this utility model; Figure 5 This is a top view of the air ring assembly of a blown film production device for antibacterial food packaging bags according to this utility model.

[0016] In the picture: 1. Base plate; 2. Extruder; 3. Drive motor; 4. Pulley assembly; 5. Feed box; 6. Mold head assembly; 601. Air outlet duct; 7. Feed hopper; 8. Support plate; 9. Air ring assembly; 901. Mounting plate; 902. Air guide ring; 903. Air guide ring groove; 904. Air pipe connector; 905. Air outlet ring; 906. Air outlet hole; 907. Connecting flow channel; 908. Adjusting assembly; 9081. Adjusting bolt; 9082. Piston plate; 9083. Spring; 909. Spoiler; 10. First protective cover; 1001. First connecting ring; 11. Second protective cover; 1101. Second connecting ring; 1102. Third connecting ring; 1103. Snap-fit ​​ring; 12. Film; 13. Herringbone wiper; 14. Extrusion roller; 15. Guide roller. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments of this application and the accompanying drawings.

[0018] like Figure 1-5 As shown, an antibacterial food packaging bag blowing film production device includes: a base plate 1, a feeding assembly is provided on the base plate 1, a die head assembly 6 is provided on one side of the feeding assembly, and support plates 8 are provided on both sides of the die head assembly 6, with the lower end of the support plate 8 fixedly connected to the base plate 1. Two sets of air ring assemblies 9 are spaced apart on the support plate 8. The air ring assemblies 9 are all located above the die head assembly 6. A first protective cover 10 is provided between the air ring assemblies 9. A second protective cover 11 is provided between the air ring assemblies 9 and the die head assembly 6. A herringbone wiping plate 13 is fixedly connected to the upper part of the support plate 8. The herringbone wiping plate 13 is located above the air ring assemblies 9. A set of extrusion rollers 14 is provided on the top of the support plate 8. A set of guide rollers 15 is provided on one side of the extrusion rollers 14.

[0019] The first protective cover 10 is positioned between the two sets of air ring assemblies 9, and the second protective cover 11 is positioned between the air ring assembly 9 and the die head assembly 6. These cover functions to isolate and protect the film, preventing external dust and debris from entering the bubble area, ensuring the cleanliness of the film, and meeting the hygiene requirements of antibacterial food packaging bags. The protective cover also reduces the interference of external airflow on the cooling process of the bubble, allowing the cooling air blown out by the air ring to act more effectively on the bubble, improving the cooling effect and the stability of the film quality.

[0020] like Figure 2As shown, first connecting rings 1001 are fixedly connected to the upper and lower sides of the first protective cover 10, and the first connecting rings 1001 are bolted to the adjacent air ring assemblies 9. The first connecting rings 1001 on the upper and lower sides of the first protective cover 10 are bolted to the adjacent air ring assemblies 9. Bolting is a reliable and commonly used mechanical connection method, which can provide strong connection force and ensure that the first protective cover 10 is firmly installed between the two sets of air ring assemblies 9. During the operation of the blown film device, a certain amount of vibration and airflow disturbance will be generated. This stable connection method can prevent the first protective cover 10 from loosening or shifting due to vibration or external force, thus ensuring the effectiveness of its protective function.

[0021] like Figure 2 As shown, a second connecting ring 1101 is provided on the upper side of the second protective cover 11, and a third connecting ring 1102 is provided on the lower side. The second connecting ring 1101 is bolted to the adjacent air ring assembly 9. A snap ring 1103 is bolted to the lower part of the third connecting ring 1102. The third connecting ring 1102 and the snap ring 1103 cooperate to snap onto the outer edge of the mold head assembly 6.

[0022] The second connecting ring 1101 on the upper side of the second protective cover 11 is bolted to the adjacent air ring assembly 9, ensuring a stable connection between the second protective cover and the air ring assembly. This connection principle is similar to that of the first protective cover 10, enhancing structural stability and preventing shaking or displacement during equipment operation. The lower third connecting ring 1102 and the snap-fit ​​ring 1103 engage with each other on the outer edge of the die head assembly 6. This snap-fit ​​method provides a certain connection force and adapts to the shape characteristics of the die head assembly, improving the compatibility of the connection structure.

[0023] like Figure 3-5 As shown, the air ring assembly 9 includes: two mounting plates 901 fixedly connected to the support plate 8, an air guide ring 902 fixedly connected between the mounting plates 901, an air guide ring groove 903 provided inside the air guide ring 902, an air pipe connector 904 communicating with the air guide ring groove 903 provided at the lower part of the air guide ring 902, an air outlet ring 905 provided on the inner side wall of the air guide ring 902, a plurality of air outlet holes 906 evenly spaced on the inner side wall of the air outlet ring 905, the bottom of the air outlet hole 906 communicating with the air guide ring groove 903 through a connecting flow channel 907, and an adjustment component 908 provided at the bottom of the air outlet hole 906 for balancing the wind speed of each air outlet hole 906.

[0024] An air guide ring 902 has an internal air guide groove 903, which is connected to an external air source via an air pipe connector 904. This design allows the cooling air supplied by the external air source to enter the air guide groove 903 evenly, providing a stable air source for subsequent air outlets. The air guide groove 903 buffers and distributes the airflow, preventing the airflow from directly impacting the air outlets and ensuring that the airflow is evenly distributed within the air guide groove 903, providing relatively consistent air pressure to each air outlet. The inner wall of the air outlet ring 905 has several evenly spaced air outlets 906. This evenly distributed design of the air outlets 906 allows the cooling air to be evenly blown onto the membrane bubble surface. During the membrane blowing process, the membrane bubble needs uniform cooling to ensure its uniform thickness and consistent physical properties. Uniform air outlets can prevent localized overheating or undercooling of the membrane bubble, thereby improving the quality and smoothness of the membrane.

[0025] An adjustment component 908 located at the bottom of the air outlet 906 is used to balance the air velocity of each air outlet 906. In actual production, due to factors such as manufacturing process, installation errors, or uneven airflow distribution, the air velocity of each air outlet 906 may vary. The adjustment component 908 can fine-tune the air velocity of each air outlet 906 to ensure that the air velocity of each air outlet 906 is consistent. This is crucial for ensuring uniform cooling of the film bubble, effectively avoiding problems such as inconsistent film thickness and uneven surface caused by uneven air velocity, and further improving the quality and production stability of antibacterial food packaging bag film.

[0026] like Figure 4 As shown, the adjustment assembly 908 includes: an adjustment bolt 9081 threadedly connected to the bottom of the air outlet 906; a piston plate 9082 sleeved on the adjustment bolt 9081; and a spring 9083 disposed between the piston plate 9082 and the end of the adjustment bolt 9081. The piston plate 9082 and the spring 9083 cooperate to block the connecting flow channel 907.

[0027] In the air ring assembly 9, the distances between the air pipe connector 904 and each air outlet 906 are inconsistent. Air outlets 906 closer to the air pipe connector 904 experience less resistance during airflow transmission, resulting in higher wind speed and volume. Conversely, air outlets 906 farther from the air pipe connector 904 experience greater airflow resistance, potentially leading to lower wind speed and volume. This difference can cause uneven cooling of the membrane bubble, affecting membrane quality. The adjusting bolt 9081 in the adjusting assembly 908 plays a crucial compensatory role. By rotating the adjusting bolt 9081, the compression degree of the spring 9083 can be changed, thereby adjusting the degree to which the piston plate 9082 blocks the connecting flow channel. For the air outlet 906, which is closer to the air pipe connector 904 and has higher airflow pressure, the adjusting bolt 9081 can be screwed in deeper to press the piston plate 9082 against the connecting channel 907, increasing the resistance that the airflow needs to overcome to push the piston plate 9082 open, thus raising the threshold pressure of the air outlet. For the air outlet 906, which is farther from the air pipe connector 904 and has lower airflow pressure, the adjusting bolt 9081 can be screwed out slightly to reduce the degree of blockage of the connecting channel 907 by the piston plate 9082, reducing the resistance that the airflow needs to overcome to push the piston plate 9082 open, and lowering the threshold pressure of the air outlet. In this way, the airflow difference caused by the different distances between the air pipe connector 904 and the air outlet 906 can be compensated, ensuring that the wind speed and airflow of each air outlet are basically consistent.

[0028] The setting of adjusting bolt 9081 allows the staff to make flexible adjustments according to the actual production situation. Before the equipment is started, the adjusting bolt 9081 of each air outlet 906 can be adjusted in advance to balance the air speed and air volume of the air outlet 906 at different positions. During the production process, if the film cooling effect in a certain area is not ideal, the adjusting bolt of the corresponding air outlet can be finely adjusted in time to meet the requirements of the production process.

[0029] like Figure 4 As shown, the air outlet 906 is frustum-shaped, and a baffle 909 is provided on the annular sidewall of the air outlet 906. The baffle 909, located on the annular sidewall of the air outlet 906, obstructs and disturbs the airflow when it passes through the air outlet 906. This disturbance breaks the laminar flow state of the airflow, causing it to become turbulent. Turbulent airflow has a stronger mixing capacity, enabling better mixing of the cooling air with the surrounding air and improving the temperature uniformity of the cooling air. During the film blowing process, more uniform cooling air can prevent localized overheating or undercooling of the film bubble, further improving the quality and performance of the film.

[0030] like Figure 2As shown, an air outlet pipe 601 is provided in the middle of the upper surface of the die head assembly 6. The air blown out by the air outlet pipe 601 can keep the film bubble in a stable shape, prevent the film bubble from collapsing or deforming during the extrusion process, and ensure the continuity of the production process and the stability of product quality. The specific structure of the die head assembly 6 and the corresponding matching method of the air outlet pipe 601 are relatively conventional prior art, and will not be described in detail here.

[0031] like Figure 1 As shown, the feeding assembly includes an extruder 2 and a drive motor 3 fixedly connected to the base plate 1. The drive motor 3 and the extruder 2 transmit power through a pulley assembly 4. One end of the extruder 2 is connected to the die assembly 6 through a feeding box 5. A feeding hopper 7 is provided on the upper part of the extruder 2.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A blown film production device for antibacterial food packaging bags, characterized in that, include: A base plate (1) is provided with a feeding assembly. A die head assembly (6) is provided on one side of the feeding assembly. Support plates (8) are provided on both sides of the die head assembly (6). The lower end of the support plate (8) is fixedly connected to the base plate (1). Two sets of air ring assemblies (9) are spaced apart on the support plate (8). The air ring assemblies (9) are all located above the die head assembly (6). A first protective cover (10) is provided between the air ring assemblies (9). A second protective cover (11) is provided between the air ring assemblies (9) and the die head assembly (6). A herringbone wiping plate (13) is fixedly connected to the upper part of the support plate (8). The herringbone wiping plate (13) is located above the air ring assemblies (9). A set of extrusion rollers (14) is provided on the top of the support plate (8). A set of guide rollers (15) is provided on one side of the extrusion rollers (14).

2. The blown film production apparatus for antibacterial food packaging bags according to claim 1, characterized in that, The first protective cover (10) is fixedly connected to the upper and lower sides of the first connecting ring (1001), and the first connecting ring (1001) is bolted to the adjacent wind ring assembly (9).

3. The blown film production device for antibacterial food packaging bags according to claim 2, characterized in that, The second protective cover (11) is provided with a second connecting ring (1101) on its upper side and a third connecting ring (1102) on its lower side. The second connecting ring (1101) is bolted to the adjacent air ring assembly (9). The lower part of the third connecting ring (1102) is bolted to a snap ring (1103). The third connecting ring (1102) and the snap ring (1103) are engaged and snapped onto the outer edge of the mold head assembly (6).

4. The blown film production device for antibacterial food packaging bags according to claim 3, characterized in that, The air ring assembly (9) includes: two mounting plates (901) fixedly connected to the support plate (8), an air guide ring (902) fixedly connected between the mounting plates (901), an air guide ring groove (903) provided inside the air guide ring (902), an air pipe connector (904) connected to the air guide ring groove (903) at the lower part of the air guide ring (902), an air outlet ring (905) provided on the inner side wall of the air guide ring (902), a plurality of air outlet holes (906) evenly spaced on the inner side wall of the air outlet ring (905), the bottom of the air outlet hole (906) connected to the air guide ring groove (903) through a connecting flow channel (907), and an adjustment component (908) provided at the bottom of the air outlet hole (906), the adjustment component (908) being used to balance the wind speed of each air outlet hole (906).

5. The blown film production apparatus for antibacterial food packaging bags according to claim 4, characterized in that, The adjustment assembly (908) includes: an adjustment bolt (9081) threaded to the bottom of the air outlet (906), a piston plate (9082) sleeved on the adjustment bolt (9081), and a spring (9083) provided between the piston plate (9082) and the end of the adjustment bolt (9081). The piston plate (9082) and the spring (9083) cooperate to block the connecting flow channel (907).

6. The blown film production apparatus for antibacterial food packaging bags according to claim 5, characterized in that, The air outlet (906) is frustum-shaped, and a baffle (909) is provided on the annular sidewall of the air outlet (906).

7. The blown film production apparatus for antibacterial food packaging bags according to claim 1, characterized in that, An air outlet pipe (601) is provided in the middle of the upper surface of the mold head assembly (6).

8. The blown film production apparatus for antibacterial food packaging bags according to claim 1, characterized in that, The feeding assembly includes an extruder (2) and a drive motor (3) fixedly connected to the base plate (1). The drive motor (3) and the extruder (2) transmit power through a pulley assembly (4). One end of the extruder (2) is connected to the die assembly (6) through a feeding box (5). A feeding hopper (7) is provided on the upper part of the extruder (2).

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