Extrusion device for plastic bag production

Abstract

The utility model relates to the technical field of extrusion devices, and discloses an extrusion device for plastic bag production, which comprises a base, the right side of the top of the base is fixedly connected with a reduction gearbox, the left side of the top of the base is fixedly connected with a screw conveyor, and the right side of the base is fixedly connected with a motor. The output end of the motor is fixedly connected with the right end of the reduction gearbox, the left end of the reduction gearbox is fixedly connected with the screw conveyor, a conveying pipe is arranged on the left side of the screw conveyor, and a filtering mechanism is arranged between the screw conveyor and the conveying pipe. According to the utility model, through the cooperation of the motor, the reduction gearbox and the screw conveyor and the combined action of precise transmission power, the fan, the air box, the air conveying pipe, the outer air ring, the vertical air pipe and the inner air ring, the interior and exterior of the plastic film are cooled and shaped cooperatively, so that the problem that no shaping and cooling assembly exists in the prior art is solved; the extruded plastic film is easy to adhere, and the later cutting difficulty is increased.

Description

Technical Field

[0001] This utility model relates to the field of extrusion equipment technology, and in particular to an extrusion equipment for producing plastic bags. Background Technology

[0002] Plastic bags are bags made primarily of plastic. In the production process of plastic bags, an extrusion device is usually required. The raw material for the plastic bag is heated and plasticized by the action between the barrel and the screw of the extrusion device, and is pushed forward by the screw to be extruded into shape.

[0003] A search revealed Chinese patent publication number CN222662597U, which discloses an extrusion device for producing plastic bags. The device includes an extruder heating shell body, a support leg fixedly installed at the bottom of the extruder heating shell body, a base plate fixedly installed at the bottom of the support leg, a support rod fixedly installed at the top of the extruder heating shell body, an extrusion disassembly mechanism provided inside the extruder heating shell body and at its right end, and a stirring mechanism provided inside the support rod. This extrusion device for producing plastic bags uses a rotating discharge head to fix the plug to the insertion block, while a retaining strip limits the insertion block, ensuring the discharge head is securely fixed. When cleaning is required, the discharge head can be removed by disconnecting the plug, avoiding the drawback of non-removable discharge heads. This also prevents the extrusion volume from being affected. However, in actual use, the high temperature and poor shaping ability of the freshly extruded plastic film, coupled with the lack of corresponding shaping and cooling components, causes the extruded plastic film to stick together, increasing the difficulty of subsequent cutting and reducing the device's practicality. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an extrusion device for plastic bag production, which aims to improve the existing technology by addressing the problem that the lack of corresponding shaping and cooling components leads to the extruded plastic films sticking together, increasing the difficulty of subsequent cutting, and reducing the practicality of the device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an extrusion device for plastic bag production, comprising a base, a gearbox fixedly connected to the top right side of the base, a screw conveyor fixedly connected to the top left side of the base, a motor fixedly connected to the right side of the base, the output end of the motor fixedly connected to the right end of the gearbox, the left end of the gearbox fixedly connected to the screw conveyor, a conveying pipe provided on the left side of the screw conveyor, a filtering mechanism provided between the screw conveyor and the conveying pipe, and a static mixing device connected to the left end of the conveying pipe. The static mixer has a forming barrel connected to its left end. A mold core is fixedly connected to the top center of the forming barrel. A mold lip is fixedly connected to the top of the inner wall of the forming barrel. A flow equalization groove is formed on the inner wall of the forming barrel. A flow equalization plate is fixedly connected to the middle of the inner wall of the flow equalization groove. A wind box is fixedly connected to the bottom of the forming barrel. A fan is connected to the front side of the outer wall of the wind box. Air supply pipes are connected to the top of the wind box around its perimeter. The tops of multiple air supply pipes are fixedly connected to the same outer air ring. A vertical air duct is connected to the top center of the wind box. An inner air ring is connected to the middle of the outer wall of the vertical air duct.

[0006] The above technical solution involves a gearbox connecting the motor output to the screw conveyor. Because the high speed of the motor is unsuitable for direct drive of the screw conveyor, the gearbox uses an internal gear set to convert the high-speed motor rotation into a lower speed suitable for the screw conveyor's operation and increase torque. This ensures the screw conveyor stably and efficiently pushes the plastic raw material. Driven by the gearbox, the screw conveyor pushes the raw material axially to the left via the screw's rotation to the conveying pipe. The conveying pipe receives the filtered raw material and transports it to the static mixer, which connects the filtration and mixing mechanisms. The static mixer utilizes a special internal structure to thoroughly mix the plastic raw material, promoting uniform component distribution and providing the molding drum with stable quality and composition. Uniform materials ensure the performance of the plastic bags. Inside the forming barrel, the mold core is located at the top center, and the mold lip is fixed to the top of the inner wall. The two work together to give the raw material a bag-like shape. At the same time, the flow equalization channel and the flow equalization plate work together. The flow equalization channel guides the flow of the raw material, and the flow equalization plate divides and rectifies the raw material to ensure uniform distribution of the raw material and make the plastic bag thickness consistent. The air box, as the cooling air distribution hub, is connected to the fan, air supply pipe, and vertical air duct. The air supply pipes around the top of the air box introduce air into the outer air ring to cool the outer plastic film, and the vertical air duct at the top center sends air to the inner air ring to cool the inner plastic film. The inner and outer air rings work together to accelerate the cooling and shaping of the plastic film, so that it solidifies into a plastic bag with a certain strength and shape.

[0007] As a further description of the above technical solution:

[0008] The filtering mechanism includes a rotating plate, the bottom of which is rotatably connected to the top left side of the base. A mounting groove is formed in the middle of the rotating plate, and a filter screen is threaded onto the inner wall of the mounting groove. A vertical rod is fixedly connected to the rear left side of the base. An arc-shaped plate is fixedly connected to the rear top side of the rotating plate. An arc-shaped groove is formed on the front outer wall of the screw conveyor, and the arc-shaped plate is slidably connected to the arc-shaped groove. A spring-loaded block is slidably connected to the top inner wall of the vertical rod. A locking hole is formed on the top of the arc-shaped plate, and the spring-loaded block engages with the locking hole.

[0009] The above technical solution achieves the following: In its initial state, the rotating plate is connected to the bottom and the top left of the base, combining stability and rotational flexibility. The mounting groove in the middle of the rotating plate is connected to the filter screen with threads, ensuring a secure installation and facilitating later disassembly and replacement. When the screw conveyor transports plastic raw materials, the materials naturally flow to the filter screen on the rotating plate. The filter screen, with a pre-set mesh size according to production requirements, intercepts larger impurity particles, allowing smaller particles that meet the requirements to pass through and fall into the conveying pipe below, thus achieving raw material filtration and ensuring the purity of raw materials in subsequent processes. During filtration, the arc-shaped plate fixed to the rear top of the rotating plate slides in connection with the arc-shaped groove on the front side of the outer wall of the screw conveyor. This connection limits the rotation range of the rotating plate while ensuring flexible rotation within a certain angle. The angle can be finely adjusted to optimize the filtration effect, allowing the raw material to be evenly distributed on the filter screen. During normal operation, the spring-loaded block on the top of the inner wall of the upright engages tightly with the engaging hole on the top of the arc-shaped plate under the action of elasticity, fixing the rotating plate and ensuring stable filtration. When cleaning or replacing the filter screen is required, the spring-loaded block is pulled upward to disengage it from the engaging hole, releasing the lock on the rotating plate.

[0010] As a further description of the above technical solution:

[0011] An information board is provided on the front side of the outer wall of the screw conveyor. Screws are threaded around the outer wall of the information board, and the rear ends of the screws are threaded to the screw conveyor.

[0012] The above technical solution achieves a stable installation of the information board by means of screws that are threaded to the front side of the outer wall of the screw conveyor. This fixing method is simple to operate and has a firm connection, ensuring that the information board remains stable during equipment operation. The purpose of setting up the information board is to display relevant equipment information to the operators.

[0013] As a further description of the above technical solution:

[0014] A controller is fixedly connected to the front side of the outer wall of the gearbox, and the controller is electrically connected to the motor and the fan.

[0015] The above technical solution involves fixing the controller to the front side of the outer wall of the gearbox and electrically connecting it to the motor and fan. This allows for the adjustment of their operating parameters, enabling precise control of the device's power and cooling systems.

[0016] As a further description of the above technical solution:

[0017] A mounting box is fixedly connected to the top of the gearbox, and an alarm light is fixedly connected to the inner wall of the mounting box.

[0018] The above technical solution enables the alarm light to illuminate when an abnormal situation occurs during equipment operation, providing a conspicuous visual alert to promptly warn operators that the equipment has malfunctioned.

[0019] As a further description of the above technical solution:

[0020] A handle is fixedly connected to the top front side of the rotating plate, and the surface of the handle is treated with anti-slip material.

[0021] Through the above technical solution, the handle fixed to the front of the top of the rotating plate is carefully treated with anti-slip treatment. This design is intended to make it easy for operators to hold firmly. By applying force to the handle to rotate the rotating plate, the cleaning and replacement of the filter screen can be smoothly realized, ensuring the smooth operation of the filtration process.

[0022] As a further description of the above technical solution:

[0023] The bottom of the bellows is provided with feet on all four sides, and the outer walls of the feet are threaded with multiple bolts, which are threaded to the bellows.

[0024] The above technical solution involves providing feet around the bottom of the bellows. These feet, connected to the bellows by multiple bolts threaded together, not only stabilize the bellows but also allow for flexible adjustment of its height and level according to actual needs.

[0025] As a further description of the above technical solution:

[0026] The top of the spring block is rotatably connected to a pull ring, and the surface of the pull ring is treated with an anti-slip coating.

[0027] The above technical solution involves an anti-slip treatment on the pull ring. The operator then pulls the pull ring to disengage the spring clip from the locking hole, unlocking the rotating plate.

[0028] As a further description of the above technical solution:

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, the motor, gearbox and screw conveyor work together to accurately transmit power and stably transport raw materials. The static mixer fully mixes the raw materials to ensure quality. The flow equalization trough and flow equalization plate make the raw materials evenly distributed to ensure consistent plastic bag thickness. The fan, air box, air duct, outer air ring, vertical air duct and inner air ring work together to cool and shape the plastic film inside and out. This effectively solves the problem in the prior art that the lack of shaping and cooling components makes the plastic film easy to stick together after extrusion and increases the difficulty of subsequent cutting.

[0031] 2. In this utility model, the bottom of the rotating plate is rotatably connected to the base, making it stable and rotatable. The mounting groove of the rotating plate is threadedly connected to the filter screen, which facilitates the secure installation and disassembly and replacement of the filter screen. The filter screen can be cleaned or replaced as needed to ensure the filtration effect. The arc plate and the arc groove are slidably connected, which limits the rotation range while ensuring rotation flexibility, adapting to different operating scenarios. Attached Figure Description

[0032] Figure 1 This is a perspective view of an extrusion device for producing plastic bags according to the present invention;

[0033] Figure 2 This is a partial structural exploded view of an extrusion device for producing plastic bags according to this utility model;

[0034] Figure 3 This is a cross-sectional view of the forming barrel of an extrusion device for producing plastic bags according to this utility model;

[0035] Figure 4 This is a schematic diagram of the filter mechanism of an extrusion device for producing plastic bags according to the present invention;

[0036] Figure 5 This is an exploded view of the filter mechanism of an extrusion device for producing plastic bags according to this utility model.

[0037] Legend:

[0038] 1. Base; 2. Filtering mechanism; 201. Rotating plate; 202. Mounting groove; 203. Filter screen; 204. Upright pole; 205. Arc plate; 206. Engaging hole; 207. Arc groove; 208. Spring clip; 3. Gearbox; 4. Screw conveyor; 5. Motor; 6. Conveying pipe; 7. Static mixer; 8. Forming barrel; 9. Mold core; 10. Mold lip; 11. Flow equalization groove; 12. Flow equalization plate; 13. Air box; 14. Air duct; 15. Outer air ring; 16. Vertical air duct; 17. Inner air ring; 18. Information board; 19. Screw; 20. Fan; 21. Controller; 22. Mounting box; 23. Alarm light; 24. Handle; 25. Foot; 26. Bolt; 27. Pull ring. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of an extrusion device for plastic bag production, including a base 1, which provides a stable support foundation for the entire device, ensuring that the relative positions of each component remain fixed during operation. A reduction gearbox 3 is fixedly connected to the top right side of the base 1 to reduce the high-speed rotation output of the motor 5 and increase the torque. A screw conveyor 4 is fixedly connected to the top left side of the base 1, which, under power drive, propels the plastic raw material along the conveying direction to provide material for subsequent processing stages. A motor 5 is fixedly connected to the right side of the base 1 as a power source to provide power for the operation of the entire device. The output end of the motor 5 is fixedly connected to the right end of the reduction gearbox 3, and the left end of the reduction gearbox 3 is fixedly connected to the screw conveyor 4 to ensure that the reduction gearbox 3 stably transmits the adjusted power to the screw conveyor 4. A conveying pipe 6 is provided on the left side of the screw conveyor 4 to receive the raw material sent out by the screw conveyor 4 and convey it to the subsequent static mixer 7. A filter mechanism 2 is provided between the screw conveyor 4 and the conveying pipe 6 to remove impurities and improve the purity of the raw material. The left end of the conveying pipe 6 is connected to the static mixer 7. The static mixer 7 thoroughly mixes the plastic raw materials to ensure uniform composition. The left end of the static mixer 7 is connected to a forming tank 8, where the raw materials are initially shaped into plastic bags. A mold core 9 is fixedly connected to the top center of the forming tank 8, and a mold lip 10 is fixedly connected to the top of the inner wall of the forming tank 8. The mold lip 10 and the mold core 9 work together to determine the shape and size of the plastic raw materials in the initial molding stage. A flow equalization groove 11 is formed on the inner wall of the forming tank 8 to guide the flow direction of the raw materials within the forming tank 8, making the material distribution more uniform. A flow equalization groove 11 is fixedly connected to the middle of its inner wall. A flow equalization plate 12 is provided to further divide and rectify the raw materials, ensuring that the raw materials are evenly distributed in the forming barrel 8. A wind box 13 is fixedly connected to the bottom of the forming barrel 8. A fan 20 is connected to the front side of the outer wall of the wind box 13. Air supply pipes 14 are connected to the top of the wind box 13 around the perimeter, guiding the air in the wind box 13 to the outer air ring 15. The tops of multiple air supply pipes 14 are fixedly connected to the same outer air ring 15. A vertical air pipe 16 is connected to the top center of the wind box 13. An inner air ring 17 is connected to the outer center of the vertical air pipe 16, evenly distributing the air on the surface of the inner plastic film.

[0041] Specifically, the gearbox 3 connects the output of the motor 5 to the screw conveyor 4. Since the motor 5 operates at a high speed, it is not suitable for direct drive of the screw conveyor 4. The gearbox 3, through its internal gear set, converts the high-speed rotation of the motor 5 into a lower speed suitable for the screw conveyor 4, while simultaneously increasing torque to ensure the screw conveyor 4 stably and efficiently pushes the raw material. Driven by the power transmitted from the gearbox 3, the screw conveyor 4, through the rotation of the screw, pushes the plastic raw material placed within it axially to the left, allowing it to enter the subsequent processing stage. The conveying pipe 6 transports the filtered raw material to the static mixer 7, acting as a bridge connecting the filtering mechanism 2 and the mixing mechanism. The static mixer 7 thoroughly mixes the passing plastic raw material, utilizing its special internal structure to promote the uniform distribution of different components, providing stable and uniform material for subsequent molding, ensuring the performance of the plastic bag. Stable, the raw material completes the initial forming in the forming barrel 8. The mold core 9 is located at the top center, and the mold lip 10 is fixed to the top of the inner wall. The two work together to give the raw material a bag-like shape. The flow equalization groove 11 and the flow equalization plate 12 work together on the inner wall of the forming barrel 8. The flow equalization groove 11 guides the flow direction of the raw material, and the flow equalization plate 12 divides and rectifies the raw material to ensure that the raw material is evenly distributed in the forming barrel 8, so that the produced plastic bags have a consistent thickness. The air box 13 is connected to the fan 20, the air supply pipe 14, and the vertical air pipe 16. It is the distribution hub of the cooling air. The air supply pipe 14 around the top of the air box 13 introduces the air into the outer air ring 15 to cool the outer plastic film. The vertical air pipe 16 at the top center of the air box 13 sends the air to the inner air ring 17 to cool the inner plastic film. The inner air ring 17 and the outer air ring 15 work together to accelerate the cooling and shaping of the plastic film, so that it can be quickly solidified into a plastic bag with a certain strength and shape.

[0042] Reference Figure 1 , Figure 4 and Figure 5The filter mechanism 2 includes a rotating plate 201, the bottom of which is rotatably connected to the top left side of the base 1. A mounting groove 202 is provided in the middle of the rotating plate 201 to provide an installation position for the filter screen 203. The inner wall of the mounting groove 202 is threaded with the filter screen 203. A vertical rod 204 is fixedly connected to the rear left side of the base 1 to provide mounting support for the spring clip 208 and, in conjunction with other components, to restrict the rotation of the rotating plate 201. An arc-shaped plate 205 is fixedly connected to the rear top of the rotating plate 201, which, along with the arc-shaped groove 207 on the front side of the outer wall of the screw conveyor 4 and the plate on the vertical rod 204... The spring clips 208 cooperate with each other to control the rotation of the rotating plate 201. The outer wall of the screw conveyor 4 has an arc groove 207 on the front side, which is slidably connected to the arc plate 205 to limit the rotation range of the rotating plate 201. The arc plate 205 is slidably connected to the arc groove 207. The top of the inner wall of the upright 204 is slidably connected to the spring clips 208. The top of the arc plate 205 has a locking hole 206, which cooperates with the spring clips 208 to fix the rotating plate 201 in a specific position during normal operation, ensuring the stability of the filtration process. The spring clips 208 are engaged with the locking hole 206.

[0043] Specifically, initially, the rotating plate 201 maintains a stable and rotatable state through the rotating connection between its bottom and the top left side of the base 1. The mounting groove 202 in the middle of the rotating plate 201 fixes the filter screen 203 with a threaded connection, ensuring a stable installation and facilitating later disassembly and replacement. When the screw conveyor 4 starts conveying plastic raw materials, the raw materials will naturally flow to the filter screen 203 on the rotating plate 201. Since the mesh size of the filter screen 203 is preset according to production requirements, larger impurity particles are intercepted on the surface of the filter screen 203, while fine raw material particles that meet the requirements pass through the filter screen 203 and fall into the conveying pipe 6 below, thus achieving the filtration of the raw materials and ensuring the purity of the raw materials entering the subsequent process. During the filtration process, the arc-shaped plate 205 fixed to the rear side of the top of the rotating plate 201 and the outer wall of the screw conveyor 4... The arc-shaped groove 207 on the front side provides a sliding connection. This connection limits the rotation range of the rotating plate 201 while ensuring that it can rotate flexibly within a certain angle. For example, when it is necessary to fine-tune the angle of the rotating plate 201 to optimize the material filtration effect, it can rotate within the range allowed by the arc-shaped groove 207, so that the material is more evenly distributed on the filter screen 203. During normal operation, the spring-loaded block 208 on the top of the inner wall of the upright 204 is tightly engaged with the engaging hole 206 on the top of the arc-shaped plate 205 under its own elastic force, which firmly fixes the rotating plate 201 in the current position, preventing it from shaking randomly during the filtration process and ensuring the stability of the filtration process. When the filter screen 203 needs to be cleaned or replaced, the spring-loaded block 208 is pulled upward to overcome the spring force and disengage it from the engaging hole 206, thus releasing the lock on the rotating plate 201.

[0044] Reference Figure 1 , Figure 2 and Figure 3 An information board 18 is installed on the front side of the outer wall of the screw conveyor 4. Screws 19 are threaded around the outer wall of the information board 18, and the rear ends of the screws 19 are threaded to the screw conveyor 4. The information board 18 is fixed to the front side of the outer wall of the screw conveyor 4 by the screws 19 threaded around the outer wall, and is used to display relevant equipment information. A controller 21 is fixedly connected to the front side of the outer wall of the gearbox 3. The controller 21 is electrically connected to the motor 5 and the fan 20, and can adjust the operating parameters of the two. A mounting box 22 is fixedly connected to the top of the gearbox 3. An alarm light 23 is fixedly connected to the inner wall of the mounting box 22. When the equipment malfunctions, the alarm light 23 can receive a signal and light up to warn the operator.

[0045] Specifically, the information board 18 is fixed to the front of the outer wall of the screw conveyor 4 by screws 19 connected by threads around the perimeter, and is used to display relevant equipment information. The controller 21 is fixed to the front of the outer wall of the gearbox 3 and is electrically connected to the motor 5 and the fan 20. It can adjust the operating parameters of the two and realize precise control of the power and cooling links of the device. The alarm light 23 inside the mounting box 22 is fixed to the top of the gearbox 3. When the equipment malfunctions, the alarm light 23 can receive a signal and light up to warn the operator.

[0046] Reference Figure 1 , Figure 4 and Figure 5 A handle 24 is fixedly connected to the top front side of the rotating plate 201. The surface of the handle 24 is treated with anti-slip material for easy gripping by the operator. The bottom of the bellows 13 is provided with feet 25 around its perimeter. Multiple bolts 26 are threadedly connected to the outer wall of the feet 25. The bolts 26 are threadedly connected to the bellows 13. The feet 25 stabilize the bellows 13 with the help of the bolts 26 threaded to the bellows 13. A pull ring 27 is rotatably connected to the top of the spring block 208. The surface of the pull ring 27 is treated with anti-slip material for easy pulling by the operator to disengage the spring block 208 from the locking hole 206 and unlock the rotating plate 201.

[0047] Specifically, the handle 24 fixed to the front top of the rotating plate 201 has an anti-slip surface for easy gripping by the operator. By applying force to the handle 24 to rotate the rotating plate 201, the filter screen 203 can be cleaned or replaced. The bottom of the air box 13 has four feet 25, which are secured by multiple bolts 26 threaded to the air box 13, and its height and level can be adjusted as needed. The pull ring 27 rotatably connected to the top of the spring block 208 has an anti-slip surface, which makes it easy for the operator to pull the pull ring 27 to disengage the spring block 208 from the locking hole 206 and unlock the rotating plate 201.

[0048] Working Principle: First, motor 5 is started, transmitting power to the connected reduction gearbox 3. The reduction gearbox 3 reduces the high-speed rotation from motor 5, transmitting power to the screw conveyor 4 at a suitable speed. Driven by the power, the screw conveyor 4 begins operation, propelling the plastic raw material placed inside along the conveying direction. Driven by the screw, the raw material is conveyed through the left-side conveying pipe 6 to the static mixer 7. The static mixer 7 thoroughly mixes the passing plastic raw material, ensuring its uniformity and providing stable material for the subsequent molding process. The uniformly mixed raw material is then conveyed to the molding barrel 8, where the molding process gradually unfolds. The mold core 9 and mold lip 10 are fixed to the top of the inner wall of the molding barrel 8, working together to initially shape the plastic raw material. The shape of the material gradually forms a bag-like prototype. At the same time, the flow equalization trough 11 and the flow equalization plate 12 play their roles. The flow equalization trough 11 is set on the inner wall of the forming barrel 8, and the flow equalization plate 12 is fixed in the middle of the inner wall of the flow equalization trough 11. Together, they divide and rectify the material, so that the material is evenly distributed in the forming barrel 8, ensuring the uniformity of the thickness of the plastic bag. The blower 20 blows air into the air box 13. The air enters the outer air ring 15 through the air supply pipe 14 connected around the top of the air box 13, cooling the outer plastic film. At the same time, the vertical air pipe 16 connected to the middle of the top of the air box 13 delivers air to the inner air ring 17, cooling the inner plastic film. Through the coordinated cooling of the inner and outer air rings 15, the cooling and shaping of the plastic film is accelerated, so that it can be quickly solidified into a plastic bag with a certain strength and shape.

[0049] In its initial state, the rotating plate 201 is connected to the top left side of the base 1 via a bottom rotatable connection, maintaining a relatively stable and rotatable state. A filter screen 203 is threadedly connected to the mounting groove 202 in the middle of the rotating plate 201. This connection method ensures the filter screen 203 is securely installed and easy to disassemble and replace. When filtering plastic raw materials, the materials naturally flow towards the filter screen 203. Since the mesh size of the filter screen 203 is pre-set according to production requirements, larger impurity particles are intercepted on the filter screen 203, while smaller raw material particles that meet the requirements pass through the filter screen 203 and enter the conveying pipe 6 below, thus achieving material filtration. During the filtration process, the rotating plate 201 and the screw conveyor 4 cooperate with each other through the arc-shaped plate 205 and the arc-shaped groove 207. The arc-shaped plate 205 fixedly connected to the top rear side of the rotating plate 201 is slidably connected to the arc-shaped groove 207 opened on the front side of the outer wall of the screw conveyor 4. This connection method not only limits the rotation range of the rotating plate 201, but also ensures that the rotating plate 201 can rotate flexibly within a certain angle to adapt to different operating requirements. During normal operation, the spring block 208 engages with the engagement hole 206 under its own elastic force, fixing the rotating plate 201 in the current position and ensuring the stability of the filtration process. When cleaning or replacement is required, the spring block 208 is pulled upward to disengage it from the engagement hole 206 and release the lock on the rotating plate 201. At this time, the rotating plate 201 can be rotated around the rotation connection point between the rotating plate 201 and the base 1 to expose the filter screen 203 for easy cleaning or replacement.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. An extrusion apparatus for producing plastic bags, comprising a base (1), characterized in that: A gearbox (3) is fixedly connected to the top right side of the base (1), a screw conveyor (4) is fixedly connected to the top left side of the base (1), a motor (5) is fixedly connected to the right side of the base (1), the output end of the motor (5) is fixedly connected to the right end of the gearbox (3), the left end of the gearbox (3) is fixedly connected to the screw conveyor (4), a conveying pipe (6) is provided on the left side of the screw conveyor (4), a filter mechanism (2) is provided between the screw conveyor (4) and the conveying pipe (6), a static mixer (7) is connected to the left end of the conveying pipe (6), a forming barrel (8) is connected to the left end of the static mixer (7), and the top of the forming barrel (8) is... A mold core (9) is fixedly connected to the middle of the end. A mold lip (10) is fixedly connected to the top of the inner wall of the molding barrel (8). A flow equalization groove (11) is opened on the inner wall of the molding barrel (8). A flow equalization plate (12) is fixedly connected to the middle of the inner wall of the flow equalization groove (11). A wind box (13) is fixedly connected to the bottom of the molding barrel (8). A fan (20) is connected to the front side of the outer wall of the wind box (13). Air supply pipes (14) are connected to the top of the wind box (13). The top of multiple air supply pipes (14) is fixedly connected to the same outer air ring (15). A vertical air pipe (16) is connected to the middle of the top of the wind box (13). An inner air ring (17) is connected to the middle of the outer wall of the vertical air pipe (16).

2. The extrusion apparatus for producing plastic bags according to claim 1, characterized in that: The filtering mechanism (2) includes a rotating plate (201), the bottom of which is rotatably connected to the top left side of the base (1). The middle part of the rotating plate (201) is provided with an installation groove (202), and the inner wall of the installation groove (202) is threaded with a filter screen (203). The left rear side of the base (1) is fixedly connected with a vertical rod (204), and the top rear side of the rotating plate (201) is fixedly connected with an arc plate (205). The front side of the outer wall of the screw conveyor (4) is provided with an arc groove (207), and the arc plate (205) is slidably connected to the arc groove (207). The top of the inner wall of the vertical rod (204) is slidably connected with a spring block (208), and the top of the arc plate (205) is provided with a locking hole (206), which is engaged with the spring block (208).

3. The extrusion apparatus for producing plastic bags according to claim 1, characterized in that: An information board (18) is provided on the front side of the outer wall of the screw conveyor (4). Screws (19) are threaded around the outer wall of the information board (18), and the rear ends of the screws (19) are threaded to the screw conveyor (4).

4. The extrusion apparatus for producing plastic bags according to claim 1, characterized in that: A controller (21) is fixedly connected to the front side of the outer wall of the gearbox (3), and the controller (21) is electrically connected to the motor (5) and the fan (20).

5. The extrusion apparatus for producing plastic bags according to claim 1, characterized in that: The top of the gearbox (3) is fixedly connected to a mounting box (22), and an alarm light (23) is fixedly connected to the inner wall of the mounting box (22).

6. An extrusion apparatus for producing plastic bags according to claim 2, characterized in that: A handle (24) is fixedly connected to the top front side of the rotating plate (201), and the surface of the handle (24) is treated with anti-slip treatment.

7. The extrusion apparatus for producing plastic bags according to claim 1, characterized in that: The bottom of the bellows (13) is provided with feet (25) around the perimeter. The outer walls of the feet (25) are threaded with bolts (26), and the bolts (26) are threaded to the bellows (13).

8. An extrusion apparatus for producing plastic bags according to claim 2, characterized in that: The top of the spring clip (208) is rotatably connected to a pull ring (27), and the surface of the pull ring (27) is treated with anti-slip treatment.

Images