A spunbond nonwoven fabric production device

Abstract

The present invention relates to the technical field of spunbond nonwoven fabrics, and discloses a production device for spunbond nonwoven fabrics, including a channel structure and a filtering structure. The filtering structure includes a filter cylinder, a filter screen, a fixing frame, a first spring and a magnetic force limiting block. The filter cylinder is slidably connected to the inner side of the axial direction of the channel structure. The filter screen is fixedly connected to the inner side of the filter cylinder. The fixing frame is also fixedly connected to the inner side of the filter cylinder. The magnetic force limiting block is slidably connected to the inner side of the fixing frame. By the cooperative action among the filter cylinder, the straight channel, the magnetic force limiting block, the motor, the rotating shaft and the gear belt, the production method and device for spunbond nonwoven fabrics achieve the purpose of keeping the filter screen highly coincident with the melt spinning channel after the filter screen is replaced, avoiding the phenomenon of misalignment between the filter screen and the melt spinning channel, and solving the problem that the filtering operation is easily blocked after the filter screen is replaced in the existing melt spinning filtering device.

Description

Technical Field

[0001] The present invention relates to the technical field of spunbond nonwoven fabrics, and specifically to a production device for spunbond nonwoven fabrics. Background Art

[0002] The production method of spunbond nonwoven fabrics is a process of directly forming a nonwoven fabric by melt spinning a polymer after melting. The production equipment in the existing production method of spunbond nonwoven fabrics is still in the semi-mechanized stage, and there are also some imperfections in the convenience of the filtration device for the spinning melt.

[0003] According to Chinese Patent CN108103591A, a filtration device for spinning melt includes a base; a filter cylinder seat fixed on the upper part of the base. In the upper part of the filter cylinder seat and in the middle area of the length direction of the filter cylinder seat, a filter cylinder is formed. And in the upper front part of the filter cylinder seat and at a position corresponding to the front of the filter cylinder cavity of the filter cylinder, a to-be-cleaned filter module cavity is opened. In the upper rear part of the filter cylinder seat and at a position corresponding to the rear of the filter cylinder cavity of the filter cylinder, a standby filter module cavity is opened. The filter cylinder cavity, the to-be-cleaned filter module cavity and the standby filter module cavity communicate with each other and are located on the same axis; a melt inlet interface and a melt outlet interface. The melt inlet interface is connected to the filter cylinder at a position corresponding to the right side of the filter cylinder and communicates with the filter cylinder cavity. The melt outlet interface is connected to the filter cylinder at a position corresponding to the left side of the filter cylinder and also communicates with the filter cylinder cavity. The melt inlet interface and the melt outlet interface are corresponding to each other left and right; a hydraulic mechanism fixed on the base at a position corresponding to the rear end of the filter cylinder seat; a filter module disposed in the filter cylinder cavity and corresponding to the position between the melt inlet interface and the melt outlet interface. A filter screen seat cavity is opened in the middle of the filter module. The filter screen seat cavity penetrates from the left side to the right side of the filter module, and a filter screen is disposed in the filter screen seat cavity. When the filter screen of the filter module is blocked and the filter module becomes a to-be-cleaned filter module, under the action of the hydraulic mechanism, the filter module stored in the standby filter module cavity is pushed along the standby filter module cavity to the filter cylinder cavity to replace the to-be-cleaned filter module, and the to-be-cleaned filter module enters the to-be-cleaned filter module cavity.

[0004] During the process of implementing the above operations, the inventor found at least the following problems: The filtration device for spinning melt in the existing production method of spunbond nonwoven fabrics mainly has the following technical defects: When replacing the filter module in the existing filtration device for spinning melt, there is no limit on the rotation direction of the filter module, which may lead to the situation that the filter screen in the filter module is misaligned with the melt inlet and outlet interfaces, resulting in the problem of blocked filtration operation. Summary of the Invention

[0005] The object of the present invention is to provide a production method and device for spunbond nonwoven fabrics to solve the problems raised in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A production method for spunbond nonwoven fabrics, comprising the following steps:

[0007] S1. Preparation of raw and auxiliary materials: Prepare the raw materials required for production and perform pretreatment operations on the raw materials;

[0008] S2. Transportation: Transport the raw materials of wet chips from the storage location to the drying system for treatment and transport the dried chips after drying treatment to the production line for use;

[0009] S3. Metering and mixing: Mix various raw and auxiliary materials evenly according to the proportions required by the process, feed them into the production system, and transport them to the screw extruder for processing;

[0010] S4. Extrusion and melting: Process the solid raw materials into a viscous molten state;

[0011] S5. Melt filtration: Perform a filtration operation on the melt to remove impurities in the melt;

[0012] S6. Metering: Control the melt in a state of stable pressure and uniform flow rate;

[0013] S7. Spinning: Convert the high-temperature melt into a melt streamlet, and cool and reduce the temperature of the melt streamlet to make it into fibers with stable properties;

[0014] S8. Drawing: Traction and stretching the formed fibers to increase the molecular orientation and crystallinity in the fibers and improve the mechanical and physical properties of the fibers;

[0015] S9. Web forming and cloth making: Release the disordered fibers to form a uniform and continuous fiber web; Consolidate and shape the fiber web into a nonwoven fabric.

[0016] A production device for spunbond nonwoven fabrics, comprising a channel structure, a filtering structure is slidably connected to the inner side of the axial direction of the channel structure, a circulation structure is fixedly installed on the outer side of the axial direction of the channel structure, a power device is fixedly installed on the lower side of the channel structure, the power device is the power source of the filtering structure, and the filtering structure is used in combination with the circulation structure;

[0017] The filtering structure includes a filter cylinder, a filter screen, a fixed frame, a first spring and a magnetic force limiting block, the filter cylinder is slidably connected to the inner side of the axial direction of the channel structure, the filter screen is fixedly connected to the inner side of the filter cylinder, the fixed frame is also fixedly connected to the inner side of the filter cylinder, the magnetic force limiting block is slidably connected to the inner side of the fixed frame, and a first spring is fixedly connected between the inner side wall of the fixed frame and the magnetic force limiting block.

[0018] When filtering the spinning melt, the spinning melt is passed into the flow pipe, and the spinning melt flows from one side of the branch pipe to the side of the base shell, so that the spinning melt passes through the filter screen inside the filter cylinder, thereby achieving the purpose of filtering the spinning melt. When a lot of impurities accumulate on the filter screen and the filtration efficiency is low, a large amount of spinning melt accumulates in the branch pipe and the flow pipe on one side of the branch pipe, causing the internal pressure to rise;

[0019] Furthermore, the channel structure includes a straight channel and a guide groove. The straight channel is provided on the axial outer side of the filter cartridge. The guide groove is provided on the straight channel, and the guide groove corresponds to the filter cartridge.

[0020] Furthermore, the power device includes a base shell, a motor, a rotating shaft, a gear belt and a driven shaft. The axial outer side of the straight channel is fixedly connected to the base shell, the inner side wall of the base shell is fixedly connected to the motor, the other end of the motor is transmission-connected to the rotating shaft, the axial outer side of the rotating shaft is transmission-connected to the gear belt, the axial inner side of the other end of the gear belt is transmission-connected to the driven shaft, and the driven shaft is rotationally connected to the inner side wall of the base shell.

[0021] The motor is started, and the motor drives the rotating shaft to rotate. The rotating shaft drives the gear belt to rotate counterclockwise, so that the gear belt engages and drives the filter cartridge inside the straight channel to move along the guide groove from the connecting frame side to the flow pipe side. When the magnetic limit block on the next filter cartridge and close to the previous filter cartridge passes the first through groove on the straight channel, the current inside the coil is controlled to be disconnected;

[0022] When the next filter cartridge gradually moves forward, the two magnetic limiting blocks in the filter cartridge extend to the outside of the filter cartridge under the action of the spring force of the first spring and engage with the through groove on the straight channel, thereby achieving the purpose of accurately replacing the filter cartridge;

[0023] Furthermore, the circulation structure includes a circulation pipe, a solenoid valve, a branch pipe and a detection device. The circulation pipe is fixedly connected to the axial outer side of the straight channel, the solenoid valve is fixedly installed on the circulation pipe, the branch pipe is fixedly connected to the axial outer side of the circulation pipe, and the detection device is provided on the branch pipe.

[0024] Furthermore, the structure of the detection device includes a push rod, a second spring, a first contact, a second contact and a fixed frame. The inner side of the branch tube is slidably connected to the push rod, the end of the push rod away from the branch tube is fixedly connected to the first contact, the axial outer side of the branch tube is fixedly connected to the fixed frame, the second contact is fixedly connected to the fixed frame, the first contact corresponds to the second contact, and the second spring is sleeved on the axial outer side of the push rod.

[0025] The internal pressure rises, which then drives the push rod to drive the first contact to contact the second contact. Since the first contact, the second contact, the coil, the motor, and the solenoid valve are electrically connected, when the first contact contacts the second contact, an electric current is passed through the interior of the coil, generating a magnetic force field that repels the magnetic force limiting block, thereby driving the magnetic force limiting block to compress the first spring and move to the inner side of the filter cartridge, separating from the through hole on the straight channel;

[0026] Further, a pressing device is fixedly installed on the straight channel. The pressing device includes a connecting frame, an electric telescopic rod, and an arc-shaped pressing block. A connecting frame is fixedly connected to the axial outer side of the straight channel. The inner side wall of the connecting frame is fixedly connected with an electric telescopic rod. The other end of the electric telescopic rod is fixedly connected with an arc-shaped pressing block. The inner diameter of the arc-shaped pressing block is consistent with the inner diameter of the straight channel.

[0027] After the replacement of the filter cartridge is completed, control the motor to stop, and at the same time open the solenoid valve, so that normal filtering work can be carried out. The replaced filter cartridge falls from the through port on one side of the straight channel into the external collection box;

[0028] When feeding the unused filter cartridge into the interior of the straight channel, dock the convex block on the filter cartridge with the guiding groove on the straight channel, and then start the electric telescopic rod to drive the arc-shaped pressing block to press down the magnetic force limiting block on the filter cartridge, and then push the filter cartridge to move to the position in contact with the gear belt;

[0029] Further, tooth grooves corresponding to the gear belt are provided on the filter cartridge, and the gear belt is meshed with the filter cartridge.

[0030] Further, the inner diameter of the flow pipe is consistent with the outer diameter of the filter net, and a through groove corresponding to the magnetic force limiting block is provided on the straight channel.

[0031] Further, an electrical device is fixedly connected to the axial outer side of the straight channel. The electrical device includes a housing and a coil. A housing is fixedly connected to the axial outer side of the straight channel. The inner side wall of the housing is fixedly connected with a coil, and the coil corresponds to the magnetic force limiting block.

[0032] Compared with the prior art, the present invention provides a spunbond nonwoven fabric production method and its device, having the following beneficial effects:

[0033] 1. The spunbond nonwoven fabric production device realizes the purpose of maintaining a high degree of coincidence with the melt spinning channel after replacing the filter screen through the cooperation of a filter cartridge, a straight channel, a magnetic restriction block, a motor, a rotating shaft, and a gear belt, avoiding the phenomenon of misalignment between the filter screen and the melt spinning channel. It solves the problem that in the existing melt spinning filter device, when replacing the filter module, the rotation direction of the filter module is not limited, resulting in the misalignment of the filter screen in the filter module with the melt inlet and outlet interfaces, causing obstruction in the filtering operation.

[0034] 2. The spunbond nonwoven fabric production device realizes the purpose of automatically detecting low filtering efficiency of the filter screen and simultaneously achieves the effect of automatically replacing the filter screen through the cooperation of a push rod, a first contact, a second contact, a coil, a motor, and a solenoid valve, improving the production efficiency of nonwoven fabric production, and the device also achieves the effect of convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0036] Figure 2 is a three-dimensional sectional structural schematic diagram of the straight channel of the present invention;

[0037] Figure 3 is a three-dimensional structural schematic diagram of the flow structure of the present invention;

[0038] Figure 4 is a three-dimensional structural schematic diagram of the electrical device and the power device of the present invention;

[0039] Figure 5 is a three-dimensional structural schematic diagram of the filter structure of the present invention;

[0040] Figure 6 is of the present invention Figure 5 an enlarged schematic diagram of part A.

[0041] In the figure: 1. Channel structure; 11. Straight channel; 12. Guide groove; 2. Filter structure; 21. Filter cartridge; 22. Filter screen; 23. Fixed frame; 24. First spring; 25. Magnetic restriction block; 3. Electrical device; 31. Outer shell; 32. Coil; 4. Power device; 41. Base shell; 42. Motor; 43. Rotating shaft; 44. Gear belt; 45. Driven shaft; 5. Flow structure; 51. Flow pipe; 52. Solenoid valve; 53. Branch pipe; 54. Detection device; 541. Push rod; 542. Second spring; 543. First contact; 544. Second contact; 545. Fixed bracket; 6. Pressing device; 61. Connecting frame; 62. Electric telescopic rod; 63. Arc-shaped pressing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment

[0044] Please refer to Figures 1 - 6 , a spunbond nonwoven fabric production method, comprising the following steps:

[0045] S1. Preparation of raw and auxiliary materials: Prepare the raw materials required for production and perform pretreatment operations on the raw materials;

[0046] S2. Transportation: Transport the raw materials of wet chips from the storage location to the drying system for treatment and transport the dried chips after drying treatment to the production line for use;

[0047] S3. Metering and mixing: Mix various raw and auxiliary materials evenly according to the proportions required by the process, enter the production system, and transport them to the screw extruder for processing;

[0048] S4. Extrusion and melting: Process the solid raw materials into a viscous molten state;

[0049] S5. Melt filtration: Perform filtration operations on the melt to remove impurities in the melt;

[0050] S6. Metering: Control the melt in a state of stable pressure and uniform flow rate;

[0051] S7. Spinning: Convert the high-temperature melt into a melt streamlet, and cool and lower the temperature of the melt streamlet to make it into fibers with stable properties;

[0052] S8. Drawing: Traction and stretching of the formed fibers to increase the molecular orientation and crystallinity in the fibers and improve the mechanical and physical properties of the fibers;

[0053] S9. Web forming and cloth making: Release the disordered fibers to form a uniform and continuous fiber web; Consolidate and shape the fiber web into a nonwoven fabric.

[0054] A spunbond nonwoven fabric production device, comprising a channel structure 1, a filter structure 2 is slidably connected to the inner side of the axial direction of the channel structure 1, a circulation structure 5 is fixedly installed on the outer side of the axial direction of the channel structure 1, a power device 4 is fixedly installed on the lower side of the channel structure 1, the power device 4 is the power source of the filter structure 2, and the filter structure 2 is used in combination with the circulation structure 5;

[0055] The filtering structure 2 includes a filtering cylinder 21, a filter screen 22, a fixing frame 23, a first spring 24 and a magnetic force limiting block 25. The filtering cylinder 21 is slidably connected to the axial inner side of the channel structure 1. The filter screen 22 is fixedly connected to the inner side of the filtering cylinder 21. The fixing frame 23 is also fixedly connected to the inner side of the filtering cylinder 21. The magnetic force limiting block 25 is slidably connected to the inner side of the fixing frame 23. A first spring 24 is fixedly connected between the inner side wall of the fixing frame 23 and the magnetic force limiting block 25.

[0056] When filtering the spinning melt, the spinning melt is introduced into the flow pipe 51. The spinning melt flows from one side of the branch pipe 53 to one side of the base shell 41, so that the spinning melt passes through the filter screen 22 inside the filtering cylinder 21, thereby achieving the purpose of filtering the spinning melt. When a large amount of impurities accumulate on the filter screen 22 and the filtering efficiency is low, a large amount of spinning melt accumulates in the branch pipe 53 and the flow pipe 51 on one side of the branch pipe 53, causing the internal pressure to rise.

[0057] Furthermore, the structure of the channel structure 1 includes a straight channel 11 and a guiding groove 12. The straight channel 11 is provided on the axial outer side of the filtering cylinder 21. The guiding groove 12 is opened on the straight channel 11 and corresponds to the filtering cylinder 21.

[0058] Furthermore, the power device 4 includes a base shell 41, a motor 42, a rotating shaft 43, a gear belt 44 and a driven shaft 45. The base shell 41 is fixedly connected to the axial outer side of the straight channel 11. The inner side wall of the base shell 41 is fixedly connected to the motor 42. The other end of the motor 42 is drivingly connected to the rotating shaft 43. The gear belt 44 is drivingly connected to the axial outer side of the rotating shaft 43. The other end of the gear belt 44 is drivingly connected to the axial inner side of the driven shaft 45. The driven shaft 45 is rotatably connected to the inner side wall of the base shell 41.

[0059] Start the motor 42. The motor 42 drives the rotating shaft 43 to rotate. The rotating shaft 43 drives the gear belt 44 to rotate counterclockwise in a circular motion, so that the gear belt 44 meshes and drives the filtering cylinder 21 inside the straight channel 11 to move from the connecting frame 61 side to the flow pipe 51 side along the guiding groove 12. When the magnetic force limiting block 25 on the next filtering cylinder 21 and close to the previous filtering cylinder 21 crosses the first through slot on the straight channel 11, control the current inside the coil 32 to be disconnected.

[0060] When the next filtering cylinder 21 gradually moves forward, the two magnetic force limiting blocks 25 inside the filtering cylinder 21 extend to the outside of the filtering cylinder 21 under the spring force of the first spring 24 and are clamped with the through slots on the straight channel 11, thereby achieving the purpose of accurately replacing the filtering cylinder 21.

[0061] Further, the circulation structure 5 includes a circulation pipe 51, a solenoid valve 52, a branch pipe 53, and a detection device 54. A circulation pipe 51 is fixedly connected to the outer side of the axial direction of the straight channel 11. A solenoid valve 52 is fixedly installed on the circulation pipe 51. A branch pipe 53 is fixedly connected to the outer side of the axial direction of the circulation pipe 51. A detection device 54 is arranged on the branch pipe 53.

[0062] Further, the structure of the detection device 54 includes a push rod 541, a second spring 542, a first contact 543, a second contact 544, and a fixing bracket 545. A push rod 541 is slidably connected to the inner side of the branch pipe 53. A first contact 543 is fixedly connected to one end of the push rod 541 away from the branch pipe 53. A fixing bracket 545 is fixedly connected to the outer side of the axial direction of the branch pipe 53. A second contact 544 is fixedly connected to the fixing bracket 545. The first contact 543 corresponds to the second contact 544. A second spring 542 is sleeved on the outer side of the axial direction of the push rod 541.

[0063] When the internal pressure rises, it further pushes the push rod 541 to drive the first contact 543 to contact the second contact 544. Since the first contact 543, the second contact 544, the coil 32, the motor 42, and the solenoid valve 52 are electrically connected, when the first contact 543 contacts the second contact 544, an electric current is passed through the inside of the coil 32, generating a magnetic force that repels the magnetic force limiting block 25. Then, it pushes the magnetic force limiting block 25 to compress the first spring 24 and move to the inside of the filter cartridge 21 to be separated from the through hole on the straight channel 11.

[0064] Further, a pressing device 6 is fixedly installed on the straight channel 11. The pressing device 6 includes a connecting frame 61, an electric telescopic rod 62, and an arc-shaped pressing block 63. A connecting frame 61 is fixedly connected to the outer side of the axial direction of the straight channel 11. An electric telescopic rod 62 is fixedly connected to the inner side wall of the connecting frame 61. The other end of the electric telescopic rod 62 is fixedly connected to an arc-shaped pressing block 63. The inner diameter of the arc-shaped pressing block 63 is the same as the inner diameter of the straight channel 11.

[0065] After the replacement of the filter cartridge 21 is completed, control the motor 42 to stop, and at the same time, open the solenoid valve 52 so that normal filtering work can be carried out. The replaced filter cartridge 21 falls into an external collection box from the through port on one side of the straight channel 11.

[0066] When feeding the unused filter cartridge 21 into the inside of the straight channel 11, dock the convex block on the filter cartridge 21 with the guiding groove 12 on the straight channel 11. Then, start the electric telescopic rod 62 to drive the arc-shaped pressing block 63 to press down the magnetic force limiting block 25 on the filter cartridge 21, and then push the filter cartridge 21 to move to the position where it contacts the gear belt 44.

[0067] Further, the filter cartridge 21 is provided with tooth grooves corresponding to the gear belt 44, and the gear belt 44 is meshed with the filter cartridge 21.

[0068] Further, the inner diameter of the flow pipe 51 is consistent with the outer diameter of the filter net 22, and a through groove corresponding to the magnetic force limiting block 25 is provided on the straight channel 11.

[0069] Further, an electrical device 3 is fixedly connected to the outer side in the axial direction of the straight channel 11. The electrical device 3 includes a housing 31 and a coil 32. The housing 31 is fixedly connected to the outer side in the axial direction of the straight channel 11, the inner side wall of the housing 31 is fixedly connected to the coil 32, and the coil 32 corresponds to the magnetic force limiting block 25.

[0070] Specific usage method and function of this embodiment:

[0071] During use, first, when filtering the spinning melt, the spinning melt is introduced into the flow pipe 51. The spinning melt flows from one side of the branch pipe 53 to one side of the base shell 41, so that the spinning melt passes through the filter net 22 inside the filter cylinder 21, thereby achieving the purpose of filtering the spinning melt. When a large amount of impurities accumulate on the filter net 22 and the filtering efficiency is low, a large amount of spinning melt accumulates in the branch pipe 53 and the flow pipe 51 on one side of the branch pipe 53, causing the internal pressure to rise. Then, the push rod 541 is pushed to drive the first contact 543 to contact the second contact 544. Since the first contact 543, the second contact 544 are electrically connected to the coil 32, the motor 42, and the solenoid valve 52, when the first contact 543 contacts the second contact 544, an electric current is introduced into the coil 32, generating a magnetic force repelling the magnetic force limiting block 25, thereby pushing the magnetic force limiting block 25 to compress the first spring 24 and move to the inside of the filter cylinder 21 to separate from the through hole on the straight channel 11;

[0072] At the same time, the motor 42 is started, the motor 42 drives the rotating shaft 43 to rotate, the rotating shaft 43 drives the gear belt 44 to rotate counterclockwise in a circular motion, so that the gear belt 44 meshes and drives the filter cylinder 21 inside the straight channel 11 to move from the connecting frame 61 side to the flow pipe 51 side along the guide groove 12. When the magnetic force limiting block 25 on the next filter cylinder 21 and close to the previous filter cylinder 21 crosses the first through groove on the straight channel 11, the current inside the coil 32 is controlled to be disconnected. When the next filter cylinder 21 gradually moves forward, the two magnetic force limiting blocks 25 inside the filter cylinder 21 extend to the outside of the filter cylinder 21 under the action of the spring force of the first spring 24 and are clamped with the through grooves on the straight channel 11, thereby achieving the purpose of accurately replacing the filter cylinder 21;

[0073] After the replacement of the filter cylinder 21 is completed, the motor 42 is controlled to stop, and at the same time, the solenoid valve 52 is opened, so that normal filtering work can be carried out. The replaced filter cylinder 21 falls from the through port on one side of the straight channel 11 into an external collection box;

[0074] When feeding the unused filter cartridge 21 into the straight channel 11, the bump on the filter cartridge 21 is docked with the guiding groove 12 on the straight channel 11. Subsequently, the electric telescopic rod 62 is activated to drive the arc-shaped pressing block 63 to press down the magnetic force limiting block 25 on the filter cartridge 21, and then the filter cartridge 21 is pushed to move to a position in contact with the gear belt 44.

[0075] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spunbond nonwoven fabric production device, comprising a channel structure (1), characterized in that: The structure of the channel structure (1) includes a straight channel (11) and a guiding groove (12). A filtering structure (2) is slidably connected to the inner side in the axial direction of the channel structure (1). A circulation structure (5) is fixedly installed on the outer side in the axial direction of the channel structure (1). A power device (4) is fixedly installed on the lower side of the channel structure (1). The power device (4) is the power source for the filtering structure (2). The filtering structure (2) is used in combination with the circulation structure (5); The filtering structure (2) includes a filtering cylinder (21), a filter net (22), a fixing frame (23), a first spring (24) and a magnetic force limiting block (25). A filtering cylinder (21) is slidably connected to the inner side in the axial direction of the channel structure (1). A filter net (22) is fixedly connected to the inner side of the filtering cylinder (21). A fixing frame (23) is also fixedly connected to the inner side of the filtering cylinder (21). A magnetic force limiting block (25) is slidably connected to the inner side of the fixing frame (23). A first spring (24) is fixedly connected between the inner side wall of the fixing frame (23) and the magnetic force limiting block (25); The circulation structure (5) includes a circulation pipe (51), a solenoid valve (52), a branch pipe (53) and a detection device (54). A circulation pipe (51) is fixedly connected to the outer side in the axial direction of the straight channel (11). A solenoid valve (52) is fixedly installed on the circulation pipe (51). A branch pipe (53) is fixedly connected to the outer side in the axial direction of the circulation pipe (51). A detection device (54) is arranged on the branch pipe (53); The structure of the detection device (54) includes a push rod (541), a second spring (542), a first contact (543), a second contact (544) and a fixing bracket (545). A push rod (541) is slidably connected to the inner side of the branch pipe (53). A first contact (543) is fixedly connected to the end of the push rod (541) away from the branch pipe (53). A fixing bracket (545) is fixedly connected to the outer side in the axial direction of the branch pipe (53). A second contact (544) is fixedly connected to the fixing bracket (545). The first contact (543) corresponds to the second contact (544). A second spring (542) is sleeved on the outer side in the axial direction of the push rod (541); An electrical device (3) is fixedly connected to the outer side in the axial direction of the straight channel (11). The electrical device (3) includes a housing (31) and a coil (32). A housing (31) is fixedly connected to the outer side in the axial direction of the straight channel (11). A coil (32) is fixedly connected to the inner side wall of the housing (31). The coil (32) corresponds to the magnetic force limiting block (25).

2. A production method of spunbond nonwoven fabric, applied to the production device of spunbond nonwoven fabric described in claim 1, characterized in that, It includes the following steps: S1. Preparation of raw and auxiliary materials: Prepare the raw materials required for production and perform pretreatment operations on the raw materials; S2. Transportation: Transport the raw materials of wet slices from the storage location to the drying system for treatment and transport the dried slices after drying treatment to the production line for use; S3. Metering and mixing: Mix various raw and auxiliary materials evenly according to the proportions required by the process, enter the production system, and transport them to the screw extruder for processing; S4. Extrusion and melting: Processing solid raw materials into a viscous molten state; S5. Melt filtration: Conducting a filtration operation on the melt to remove impurities in the melt; S6. Metering: Controlling the melt to be in a state of stable pressure and uniform flow rate; S7. Spinning: Transforming the high-temperature melt into a thin melt stream, and cooling and reducing the temperature of the thin melt stream to make it into fibers with stable properties; S8. Drawing: Traction and stretching the formed fibers to increase the molecular orientation and crystallinity within the fibers and improve the mechanical and physical properties of the fibers; S9. Web forming and cloth making: Unfolding the disordered fibers to form a uniform and continuous fiber web; Consolidating and shaping the fiber web into a non-woven fabric.

3. A spunbond nonwoven fabric production device according to claim 1, characterized in that: A straight channel (11) is provided on the axial outer side of the filter cylinder (21), a guiding groove (12) is formed on the straight channel (11), and the guiding groove (12) corresponds to the filter cylinder (21).

4. The spunbond nonwoven fabric production device according to claim 3, characterized in that: The power device (4) includes a base shell (41), a motor (42), a rotating shaft (43), a gear belt (44) and a driven shaft (45). The base shell (41) is fixedly connected to the axial outer side of the straight channel (11), the motor (42) is fixedly connected to the inner side wall of the base shell (41), the rotating shaft (43) is drivenly connected to the other end of the motor (42), the gear belt (44) is drivenly connected to the axial outer side of the rotating shaft (43), the other end of the gear belt (44) is drivenly connected to the axial inner side of the driven shaft (45), and the driven shaft (45) is rotatably connected to the inner side wall of the base shell (41).

5. The spunbond nonwoven fabric production device according to claim 3, characterized in that: A pressing device (6) is fixedly installed on the straight channel (11). The pressing device (6) includes a connecting frame (61), an electric telescopic rod (62) and an arc-shaped pressing block (63). The connecting frame (61) is fixedly connected to the axial outer side of the straight channel (11), the electric telescopic rod (62) is fixedly connected to the inner side wall of the connecting frame (61), the arc-shaped pressing block (63) is fixedly connected to the other end of the electric telescopic rod (62), and the inner diameter of the arc-shaped pressing block (63) is consistent with the inner diameter of the straight channel (11).

6. The spunbond nonwoven fabric production apparatus according to claim 4, wherein: Tooth grooves corresponding to the gear belt (44) are formed on the filter cylinder (21), and the gear belt (44) is meshed with the filter cylinder (21).

7. The spunbond nonwoven fabric production device according to claim 5, characterized in that: The inner diameter of the flow pipe (51) is consistent with the outer diameter of the filter net (22), and a through groove corresponding to the magnetic limiting block (25) is formed on the straight channel (11).

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