Full-degradable non-woven fabric processing equipment and processing method thereof

Abstract

The invention discloses full-degradable non-woven fabric processing equipment and a processing method thereof, and relates to the technical field of non-woven fabric processing, and the processing equipment comprises a melt-blowing mechanism used for extruding to form a fibrous melt; the receiving mechanism comprises a receiving assembly, a cooling assembly and a stripping assembly, the receiving assembly comprises a web curtain, the web curtain is used for receiving the fibrous melt formed through extrusion, the cooling assembly is arranged on the side, away from the melt-blowing mechanism, of the web curtain and used for conducting cooling forming on the received fibrous melt, and the stripping assembly comprises a stripping plate and a stripping driving assembly; the stripping plate is arranged between the web curtain and the stripped melt-blown cloth; when the stripping plate is driven by the stripping driving assembly to move in the first direction, the stripping end of the stripping plate continuously rubs and abuts against the surface of the web curtain. When the stripping plate moves in the second direction, the stripping end of the stripping plate intermittently abuts against the surface of the web curtain; the processing equipment can realize efficient stripping and adhesion prevention of the melt-blown cloth from the web curtain.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven fabric processing technology, specifically relating to a fully degradable nonwoven fabric processing equipment and its processing method. Background Technology

[0002] Fully biodegradable nonwoven fabrics are made of biodegradable polymer materials, such as polylactic acid (PLA), polyhydroxyalkanoates (PHA), and starch-based materials. These materials can decompose into carbon dioxide, water, and other harmless substances in the natural environment within a certain period of time through the action of microorganisms, light, heat, and other factors, thereby reducing pollution to the environment.

[0003] Existing nonwoven fabric manufacturing processes include meltblown nonwoven fabric manufacturing. The process of meltblown nonwoven fabric is as follows: polymer feeding -- melt extrusion -- fiber formation -- fiber cooling -- web formation -- reinforcement into fabric. Due to the unique capillary structure of the ultrafine fibers, the number of fibers and surface area per unit area are increased, thus giving meltblown fabric excellent filtration, shielding, heat insulation and oil absorption properties.

[0004] However, in existing meltblown nonwoven fabric processing equipment, after the ultrafine fibers are sprayed out by the spinneret, they are received by the mesh curtain in the receiving device and cooled to form a web to form meltblown fabric. However, due to the continuous and slow feeding and receiving of the fiber filaments by the mesh curtain, the adhesion between the meltblown fabric and the mesh curtain increases during the cooling and forming process. The traditional method of directly tearing the meltblown fabric off the mesh curtain is prone to incomplete peeling of the meltblown fabric, or even tearing and deformation. Summary of the Invention

[0005] The purpose of this invention is to provide a simple and rationally designed fully degradable nonwoven fabric processing equipment and processing method to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions: In a first aspect, the present invention provides a fully degradable nonwoven fabric processing device, comprising: A meltblowing mechanism for extruding to form a fibrous melt; A receiving mechanism includes a receiving component, a cooling component, and a stripping component. The receiving component includes a mesh curtain for receiving fibrous melt formed by extrusion. The cooling component is located on the side of the mesh curtain away from the meltblown mechanism and is used to cool and shape the received fibrous melt. The stripping component includes a stripping plate and a stripping drive component. The output end of the stripping drive component is connected to the stripping plate, and the stripping plate is located between the mesh curtain and the stripped meltblown fabric. When the peeling plate moves along the first direction under the drive of the peeling drive assembly, the peeling end of the peeling plate continuously rubs against the surface of the mesh curtain; when the peeling plate moves along the second direction under the drive of the peeling drive assembly, the peeling end of the peeling plate intermittently abuts against the surface of the mesh curtain, wherein the first direction and the second direction are opposite.

[0007] As a further optimization of the present invention, the peeling drive assembly includes an active ratchet, a ratchet, a driven ratchet, and a reciprocating drive assembly. The ratchet is rotatably mounted on a side plate, which is mounted on a base. A driven ratchet is engaged on one side of the ratchet, and the driven ratchet is rotatably mounted on the side plate via a mounting shaft. A first torsion spring is sleeved at the mounting position of the mounting shaft and the side plate. The peeling plate is rotatably connected to a connecting shaft, and a second torsion spring is sleeved at the rotatable position of the peeling plate and the connecting shaft. An active ratchet is fixedly connected to the end of the peeling plate, and the active ratchet engages with the ratchet for transmission. The output end of the reciprocating drive assembly is driven by the active ratchet, and the reciprocating drive assembly is used to drive the active ratchet to move the peeling plate along a first direction and a second direction, respectively.

[0008] As a further optimization of the present invention, the reciprocating drive assembly includes a first motor, an eccentric rod, a connecting rod, and a swing arm. The first motor is fixedly mounted on the side plate, and the output end of the first motor is connected to the eccentric rod for transmission. The outer end of the eccentric rod is rotatably connected to the connecting rod. The end of the connecting rod away from the eccentric rod is rotatably connected to the swing arm. One side of the swing arm is rotatably mounted on the side plate. The swing arm is fixedly connected to the connecting shaft. The fixed connection point between the swing arm and the connecting shaft, the rotational connection point between the swing arm and the side plate, and the rotational connection point between the swing arm and the connecting rod are triangularly distributed.

[0009] As a further optimization of the present invention, the peeling assembly further includes a peeling roller, which is disposed on the side of the peeling plate away from the mesh curtain, and the surface of the peeling roller rubs against the side of the peeled meltblown fabric facing the mesh curtain.

[0010] As a further optimization of the present invention, the receiving component includes an active rotating roller, a driven rotating roller, and an abutting roller. The active rotating roller, the driven rotating roller, and the abutting roller are respectively mounted on the side plate. The mesh curtain is sleeved outside the active rotating roller and the driven rotating roller, and the abutting roller abuts against the receiving surface of the mesh curtain. The input end of the active rotating roller is connected to a second motor.

[0011] As a further optimization of the present invention, the cooling assembly includes a centrifugal fan, an outer pipe, an inner pipe, and a partition plate. The inner pipe is located below the receiving area of ​​the mesh curtain, and an air outlet facing the mesh curtain is opened on the side of the inner pipe facing the mesh curtain. Multiple partition plates are provided inside the inner pipe, and the partition plates divide the exhaust area of ​​the inner pipe into multiple areas. The output end of the inner pipe is connected to the input end of the centrifugal fan through the outer pipe. The inner pipe is equipped with a filter baffle, which penetrates multiple of the baffles.

[0012] As a further optimization of the present invention, a support is provided at the air outlet of the inner pipe. Along the conveying direction of the mesh curtain, support bars are fixedly provided on the front and rear sides of the support, and the upper surface of the support bars rubs against the lower surface of the mesh curtain. A pressure plate is fixedly provided on the support, and the part of the pressure plate below the mesh curtain is provided with an inclined plate. The upper surface of the support bar is higher than the upper surface of the pressure plate, and an arc plate is fixedly provided above the pressure plate, with the concave arc surface of the arc plate facing the edge of the mesh curtain.

[0013] As a further optimization of the present invention, the fully degradable nonwoven fabric processing equipment also includes an electret electrostatic mechanism, which is disposed on one side of the receiving mechanism and is used to perform electret treatment on the meltblown fabric passing through the electric field region of the electret electrostatic mechanism.

[0014] As a further optimization of the present invention, the fully degradable nonwoven fabric processing equipment further includes a slitting and winding mechanism. The slitting and winding mechanism is located on the side of the electret electrostatic mechanism away from the receiving mechanism. The slitting and winding mechanism includes a first guide roller, a slitting knife, a second guide roller, a winding power roller, and an air shaft. The peeled meltblown fabric passes through the first guide roller, the second guide roller, the winding power roller, and the air shaft in sequence. A slitting knife is provided between the first guide roller and the second guide roller. The power input end of the winding power roller is connected to a driving component.

[0015] Secondly, the present invention also provides a method for processing fully degradable nonwoven fabrics, using the aforementioned fully degradable nonwoven fabric processing equipment, the method comprising the following steps: Step 1: The fully degradable polymer chips are melted and extruded into fibrous melt using a meltblown mechanism; Step 2: The extruded fibrous melt is received by the screen in the receiving mechanism and transported to the cooling position along with the screen. Step 3: The fibrous melt conveyed to the cooling position is cooled and shaped using a cooling assembly; Step 4: Peel the meltblown fabric off the mesh curtain using the peeling assembly. When the peeling plate moves in the first direction, the peeling end of the peeling plate continuously rubs against the surface of the mesh curtain. Then, when the peeling plate moves in the second direction, the peeling end of the peeling plate intermittently abuts against the surface of the mesh curtain.

[0016] The present invention has at least the following beneficial effects: The present invention uses a receiving component, a cooling component, and a peeling component in the receiving mechanism to lay the extruded fibrous melt on the screen and slowly transport it to the peeling position with the screen. With the help of the reciprocating movement of the peeling plate in the peeling component, when the peeling plate moves in the first direction, the peeling end of the peeling plate always abuts against the bonding surface of the screen and the meltblown cloth. The meltblown cloth is peeled off from the screen by the action of the external structure. Furthermore, with the help of the movement of the peeling plate in the second direction and the intermittent oscillation motion law, the outer arc surface of the peeling plate intermittently lifts the peeled meltblown cloth, causing the airflow between the meltblown cloth and the screen to be disturbed, so as to blow away the static electricity generated on the surface of the meltblown cloth due to the contact with the screen, reduce the adhesion phenomenon between fibers due to electrostatic attraction, and ensure the peeling effect of the meltblown cloth. Furthermore, before stripping, the mesh curtain delivered to the cooling position is air-cooled by the air vents of the internal pipes in the cooling assembly, and the external air is further guided through the upper and lower edges of the mesh curtain by the inclined plates and arc plates, thereby cooling the meltblown fabric at the edge of the mesh curtain. Thus, under the partitioned air extraction cooling of the internal pipes by multiple partition plates, the meltblown fabric in the width area of ​​the mesh curtain is fully cooled by air. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the back of the receiving mechanism and meltblown fabric mold of the present invention; Figure 3 This is a schematic diagram of the receiving mechanism and the stripping assembly of the present invention; Figure 4 This is the present invention. Figure 3 A schematic diagram of the front sectional structure; Figure 5 This is a schematic diagram of the cooperation structure between the peeling component and the mesh curtain of the present invention; Figure 6 This is a schematic diagram of the structure of the peeling component, the mesh curtain, and the active rotating roller of the present invention; Figure 7 This is the invention Figure 3 A partial sectional view of the side structure; Figure 8 This is the invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the slitting and winding mechanism of the present invention.

[0018] In the diagram: 1. Meltblown mechanism; 11. Meltblown fabric mold; 2. Receiving mechanism; 21. Receiving assembly; 211. Side plate; 212. Driven rotating roller; 213. Abutting roller; 214. Mesh curtain; 215. Driven rotating roller; 216. Second motor; 22. Cooling assembly; 220. Arc plate; 221. Centrifugal fan; 222. External pipe; 223. Pressure plate; 224. Separator plate; 225. Filter plate; 226. Inspection door; 227. Internal pipe; 228. Support; 2281, Inclined plate; 229, Support bar; 23, Base; 5, Peeling assembly; 51, Peeling roller; 52, First motor; 53, Eccentric rod; 54, Connecting rod; 55, Swing rod; 56, Active ratchet; 57, Ratchet; 58, Driven ratchet; 59, Connecting shaft; 510, Peeling plate; 3, Electret electrostatic mechanism; 4, Slitting and winding mechanism; 41, First guide roller; 42, Slitting knife; 43, Second guide roller; 44, Winding power roller; 45, Air shaft. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a fully degradable nonwoven fabric processing device, comprising: Meltblowing mechanism 1, which is used to extrude and form fibrous melt; The receiving mechanism 2 includes a receiving component 21, a cooling component 22, and a stripping component 5. The receiving component 21 includes a mesh curtain 214 for receiving the fibrous melt formed by extrusion. The cooling component 22 is disposed on the side of the mesh curtain 214 away from the meltblown mechanism 1 and is used to cool and shape the received fibrous melt. The stripping component 5 includes a stripping plate 510 and a stripping drive component. The output end of the stripping drive component is connected to the stripping plate 510. The stripping plate 510 is disposed between the mesh curtain 214 and the stripped meltblown fabric. When the peeling plate 510 moves along the first direction under the drive of the peeling drive assembly, the peeling end of the peeling plate 510 continuously rubs against the surface of the mesh curtain 214; when the peeling plate 510 moves along the second direction under the drive of the peeling drive assembly, the peeling end of the peeling plate 510 intermittently abuts against the surface of the mesh curtain 214, wherein the first direction and the second direction are opposite.

[0021] As the peeling plate 510, positioned between the mesh curtain 214 and the peeled meltblown fabric, moves along the first direction, the peeling end of the peeling plate 510 continuously rubs against the surface of the mesh curtain 214, thereby peeling off the meltblown fabric that has cooled and formed on the surface of the mesh curtain 214. Furthermore, as the peeling plate 510 moves along the second direction, i.e., when the peeling plate 510 moves in the reverse direction, the peeling end of the peeling plate 510 intermittently abuts against the surface of the mesh curtain 214, causing the mesh curtain 214 to contact the just-peeled meltblown fabric. Figure 5 The dashed line trajectory represents the dynamic change in the spacing between the stripped meltblown fabric and the mesh curtain 214. This causes the outer arc surface of the stripping plate 510 to contact the meltblown fabric outwards, increasing the distance between the meltblown fabric and the mesh curtain 214. Under the action of the internal and external pressure difference, airflow enters the area between the mesh curtain 214 and the meltblown fabric. When the stripping plate 510 contacts the surface of the mesh curtain 214 again, the distance between the mesh curtain 214 and the meltblown fabric decreases, causing the previously entered airflow to be squeezed to the outside. Therefore, while the stripping plate 510 moves along the second direction and performs its own reciprocating oscillation, the airflow in the gap between the mesh curtain 214 and the stripped meltblown fabric is disturbed. The disturbed airflow can disperse the static electricity generated on the surface of the meltblown fabric due to the contact with the mesh curtain 214, reducing the adhesion phenomenon between fibers caused by electrostatic attraction, making the fiber structure of the meltblown fabric more uniform. In addition, the airflow disturbance can blow away some small impurities or incompletely attached fibers generated on the surface of the meltblown fabric due to stripping, improving the appearance quality of the product.

[0022] It should be noted that the first direction of movement of the peeling plate 510 is that the direction of movement of the peeling plate 510 is consistent with the surface trajectory of the mesh curtain 214 at the peeling position, so as to... Figure 4 and Figure 5 As shown, the surface trajectory of the mesh curtain 214 at the peeling position is an arc.

[0023] It should be further explained that the reciprocating motion of the peeling plate 510 along the first and second directions, compared to the traditional method of directly and forcefully pulling and peeling the meltblown fabric, makes the peeling action of the peeling plate 510 on the meltblown fabric relatively gentle. Moreover, the intermittent lifting motion of the peeling plate 510 as it moves along the second direction can avoid the peeling plate 510 generating continuous friction on the meltblown fabric during the retraction process, reducing the risk of tearing or damage to the meltblown fabric. In addition, under the continuous conveying of the mesh curtain 214, the lifting action of the peeling plate 510 on the meltblown fabric when it retracts along the second direction also performs preliminary lifting and peeling of the meltblown fabric that is re-conveyed to the peeling position, reducing the adhesion between the meltblown fabric and the mesh curtain 214, thereby reducing the peeling strength of the meltblown fabric when the peeling plate 510 moves along the first direction.

[0024] For example, such as Figure 2As shown, the meltblown mechanism 1 includes a meltblown fabric mold 11. Fibrous melt is ejected from the mold through a spinneret within the mold 11. Under gravity, the fibrous melt falls onto the surface of the mesh curtain 214 located below the meltblown fabric mold 11. Thus, with the continuous conveying of the mesh curtain 214, the surface of the mesh curtain 214 continuously receives the fibrous melt. The specific structure of the meltblown mechanism 1 is prior art and not the subject of this invention; therefore, it will not be described in detail here.

[0025] For example, see [link to relevant documentation]. Figure 5 and Figure 6 The peeling drive assembly includes an active ratchet 56, a ratchet 57, a driven ratchet 58, and a reciprocating drive assembly. The ratchet 57 is rotatably mounted on a side plate 211, which is mounted on a base 23. The driven ratchet 58 is engaged on one side of the ratchet 57. The driven ratchet 58 is rotatably mounted on the side plate 211 via a mounting shaft. A first torsion spring is sleeved at the mounting position of the mounting shaft and the side plate 211. The peeling plate 510 is rotatably connected to a connecting shaft 59, and a second torsion spring is sleeved at the rotatable position of the peeling plate 510 and the connecting shaft 59. The active ratchet 56 is fixedly connected to the end of the peeling plate 510. The active ratchet 56 engages with the ratchet 57 for transmission. The output end of the reciprocating drive assembly is connected to the active ratchet 56 for transmission. The reciprocating drive assembly is used to drive the active ratchet 56 to move the peeling plate 510 along a first direction and a second direction, respectively.

[0026] For example, see [link to relevant documentation]. Figure 5 and Figure 6 The reciprocating drive assembly includes a first motor 52, an eccentric rod 53, a connecting rod 54, and a swing rod 55. The first motor 52 is fixedly mounted on the side plate 211. The output end of the first motor 52 is connected to the eccentric rod 53. The outer end of the eccentric rod 53 is rotatably connected to the connecting rod 54. The end of the connecting rod 54 away from the eccentric rod 53 is rotatably connected to the swing rod 55. One side of the swing rod 55 is rotatably mounted on the side plate 211. The swing rod 55 is fixedly connected to the connecting shaft 59. The fixed connection point between the swing rod 55 and the connecting shaft 59, the rotational connection point between the swing rod 55 and the side plate 211, and the rotational connection point between the swing rod 55 and the connecting rod 54 are triangularly distributed.

[0027] In the above embodiment, driven by the first motor 52, the eccentric rod 53 drives the swing rod 55 to rotate via the connecting rod 54. When the swing rod 55 rotates counterclockwise, the active ratchet 56 engages with the ratchet 57 to rotate counterclockwise. Under the engagement of the active ratchet 56 and the ratchet 57, the peeling end of the peeling plate 510 on one side of the active ratchet 56 continuously rubs against the surface of the mesh curtain 214, thereby realizing the peeling effect of the peeling plate 510 on the meltblown fabric. When the first motor 52 continues to drive, the eccentric rod 53 drives the swing rod 55 to rotate via the connecting rod 54. When the swing arm 55 rotates clockwise, the active ratchet 56 drives the peeling plate 510 to move in the second direction. At this time, under the constraint of the driven ratchet 58 on the ratchet 57, the ratchet 57 stops rotating. Under the action of the second torsion spring, the active ratchet 56, under the abutment constraint of the ratchet of the ratchet 57, realizes that the active ratchet 56 drives the peeling plate 510 to swing intermittently, so that the outer arc surface of the peeling plate 510 intermittently lifts the meltblown cloth, thereby causing the gap between the meltblown cloth and the mesh curtain 214 to change dynamically, and causing the airflow between the meltblown cloth and the mesh curtain 214 to be disturbed.

[0028] Continue reading Figure 5 The peeling assembly 5 also includes a peeling roller 51, which is disposed on the side of the peeling plate 510 away from the mesh curtain 214. The surface of the peeling roller 51 rubs against the side of the peeled meltblown fabric facing the mesh curtain 214. The peeled meltblown fabric is guided and conveyed by the peeling roller 51. During the reciprocating lifting and peeling operation of the meltblown fabric between the peeling roller 51 and the mesh curtain 214, the peeling roller 51 always rubs against the meltblown fabric, which does not affect the stability and conveying state of the meltblown fabric on the side of the peeling roller 51 away from the mesh curtain 214, thus ensuring the subsequent slitting and winding operation of the meltblown fabric.

[0029] For example, see [link to relevant documentation]. Figure 3 and Figure 4 The receiving assembly 21 includes an active rotating roller 215, a driven rotating roller 212, and an abutment roller 213. The active rotating roller 215, driven rotating roller 212, and abutment roller 213 are respectively mounted on a side plate 211. The mesh curtain 214 is sleeved outside the active rotating roller 215 and driven rotating roller 212, and the abutment roller 213 abuts against the receiving surface of the mesh curtain 214. The input end of the active rotating roller 215 is connected to a second motor 216. Under the drive of the second motor 216, the driving direction of the active rotating roller 215 is the conveying direction of the mesh curtain 214. Figure 4For example, when the active rotating roller 215 rotates clockwise, the mesh curtain 214 is conveyed clockwise. Multiple driven rotating rollers 212 are provided, applying support force to the mesh curtain 214 from different positions to maintain its tension during operation. Furthermore, the tension of the mesh curtain 214 during long-term conveying is adjusted using the lateral adjustment of the abutment roller 213, ensuring that the meltblown fabric received by the mesh curtain 214 is evenly spread on it. For example, the lateral adjustment of the abutment roller 213 can be achieved using a laterally driven hydraulic cylinder, an electric telescopic cylinder, etc., which are not limited here.

[0030] In one embodiment, see further. Figure 3 , Figure 4 and Figure 7 The cooling assembly 22 includes a centrifugal fan 221, an outer pipe 222, an inner pipe 227, and a partition plate 224. The inner pipe 227 is located below the receiving area of ​​the mesh curtain 214. The inner pipe 227 has an air vent facing the mesh curtain 214 on its side. Multiple partition plates 224 are provided inside the inner pipe 227, which divide the exhaust area of ​​the inner pipe 227 into multiple areas. The output end of the inner pipe 227 is connected to the input end of the centrifugal fan 221 through the outer pipe 222. The inner pipe 227 is provided with a filter baffle 225, which passes through multiple partition plates 224. The filter baffle 225 is used to filter the drawn-in air to prevent the meltblown fabric fibers carried by the air from entering the inner pipe 227 and causing pipe blockage.

[0031] It should be noted that an inspection door 226 is also provided on the side panel 211. The inspection door 226 is provided corresponding to the inner pipe 227, so that maintenance personnel can inspect the condition inside the inner pipe 227 through the inspection door 226.

[0032] Under the exhaust operation of the centrifugal fan 221, negative pressure is generated on the air vents of the inner pipe 227 through the outer pipe 222 and the inner pipe 227, so that the mesh curtain 214 conveyed through the air vents is cooled by air, thereby achieving the cooling and shaping of the meltblown cloth on the mesh curtain 214. Moreover, the inner pipe 227 is divided into multiple areas by the partition plate 224, making the exhaust in the inner pipe 227 more uniform, avoiding excessive differences in cooling effect at different positions of the mesh curtain 214, and ensuring that the meltblown cloth can be cooled uniformly in the width direction.

[0033] For example, see [link to relevant documentation]. Figure 7 and Figure 8A support 228 is provided at the air outlet of the inner pipe 227. Along the conveying direction of the mesh curtain 214, support bars 229 are fixedly provided on the front and rear sides of the support 228 respectively. The upper surface of the support bar 229 rubs against the lower surface of the mesh curtain 214. A pressure plate 223 is fixedly provided on the support 228. The part of the pressure plate 223 located below the mesh curtain 214 is provided with an inclined plate 2281. The upper surface of the support bar 229 is higher than the upper surface of the pressure plate 223. An arc plate 220 is fixedly provided above the pressure plate 223. The concave arc surface of the arc plate 220 is set towards the edge of the mesh curtain 214.

[0034] The mesh curtain 214 located at the air outlet is further supported by the front and rear support bars 229, leaving gaps on the sides of the mesh curtain 214. Under the negative pressure of the inner pipe 227, the outside air is guided to the bottom of the mesh curtain 214 through the inclined plate 2281. According to the expression of the fluid continuity equation A1V1=A2V2, the airflow speed increases as it passes through the gap area between the inclined plate 2281 and the mesh curtain 214, thereby rapidly cooling the edge of the mesh curtain 214. This avoids deformation, adhesion, or other quality defects in the meltblown fabric at the edge of the mesh curtain 214 due to the concentrated air cooling in the middle compared to the edge. Furthermore, with the help of the arc plate 220, the airflow is further guided to bypass the lower edge of the mesh curtain 214 from the upper edge, ensuring uniform cooling of the meltblown fabric at the edge of the mesh curtain 214.

[0035] For example, see [link to relevant documentation]. Figure 1 The fully degradable nonwoven fabric processing equipment also includes an electret electrostatic mechanism 3, which is located on one side of the receiving mechanism 2. The electret electrostatic mechanism 3 is used to electret process the meltblown fabric that passes through the electric field region of the electret electrostatic mechanism 3.

[0036] It should be noted that the electret treatment process for meltblown fabric involves flattening the cooled and formed meltblown fabric and passing it through the inner cavity region of the electret electrostatic mechanism 3, i.e., the electric field region. At this point, the meltblown fabric is positioned between two electrodes. Upon powering on, a strong electric field is formed between the two electrodes, causing corona discharge and ionizing the surrounding air, generating a large number of ions and electrons. Under the influence of the electric field, these ions and electrons are accelerated and bombard the surface of the meltblown fabric fibers. Some of these ions and electrons are captured by the fibers, thus charging the meltblown fabric and achieving electret treatment. During the electret process, parameters such as electric field strength and discharge time need to be carefully controlled to ensure that the meltblown fabric obtains a suitable amount and distribution of charge. Specific parameters can be adjusted according to actual production needs and are not limited here.

[0037] The electret-treated meltblown fabric is then further processed by the slitting and winding mechanism 4 to obtain meltblown fabric with good filtration performance. Specifically, as shown in... Figure 1 and Figure 9 As shown, the slitting and winding mechanism 4 is located on the side of the electret electrostatic mechanism 3 away from the receiving mechanism 2. The slitting and winding mechanism 4 includes a first guide roller 41, a slitting blade 42, a second guide roller 43, a winding power roller 44, and an air shaft 45. The stripped meltblown fabric passes sequentially around the first guide roller 41, the second guide roller 43, the winding power roller 44, and the air shaft 45. The slitting blade 42 is arranged between the first guide roller 41 and the second guide roller 43. The power input end of the winding power roller 44 is connected to a driving component.

[0038] After electret treatment, the meltblown fabric is tensioned and guided by the first guide roller 41 and the second guide roller 43. Multiple slitting blades 42 can be provided. The position of the slitting blades 42 is adjusted according to the cutting size requirements. Under the cutting action of the slitting blades 42, the meltblown fabric is cut into multiple pieces. The driving component provides driving force to the winding power roller 44, causing it to rotate. Friction is generated between the winding power roller 44 and the air expansion shaft 45 through the meltblown fabric. When the winding power roller 44 rotates, since the meltblown fabric passes around the winding power roller 44 and the air expansion shaft 45 and is in a tensioned state, the friction between the surface of the winding power roller 44 and the meltblown fabric will drive the meltblown fabric to move. As the meltblown fabric moves continuously under the drive of the winding power roller 44, the air shaft 45 also begins to rotate under the friction of the meltblown fabric. When the air shaft 45 rotates, its surface linear velocity remains consistent with that of the winding power roller 44 to ensure that the meltblown fabric remains taut during winding and does not stretch or slack. In this way, the air shaft 45 can neatly wind up the meltblown fabric after it has been cut by the slitting blade 42, realizing the slitting and winding function of the slitting and winding mechanism 4 for cutting and winding the meltblown fabric.

[0039] In another embodiment, the present invention also provides a method for processing fully degradable nonwoven fabrics, using the aforementioned fully degradable nonwoven fabric processing equipment, the method comprising the following steps: Step 1: The fully degradable polymer chips are melted and extruded into fibrous melt using meltblown mechanism 1; Step 2: The extruded fibrous melt is received by the screen 214 in the receiving mechanism 2 and transported to the cooling position along with the screen 214; Step 3: The fibrous melt conveyed to the cooling position is cooled and shaped by the cooling component 22; Step 4: The meltblown fabric is peeled off from the mesh curtain 214 by the peeling assembly 5. When the peeling plate 510 moves in the first direction, the peeling end of the peeling plate 510 continuously rubs against the surface of the mesh curtain 214; then when the peeling plate 510 moves in the second direction, the peeling end of the peeling plate 510 intermittently abuts against the surface of the mesh curtain 214.

[0040] It should be noted that, in use, the raw material of the fully degradable nonwoven fabric is melted by the meltblown mechanism 1, and the fibrous melt is sprayed out of the mold by the spinneret of the meltblown fabric mold 11. Under the action of gravity, the fibrous melt falls on the surface of the mesh curtain 214 located below the meltblown fabric mold 11. Thus, under the continuous conveying of the mesh curtain 214, the surface of the mesh curtain 214 continuously receives the fibrous melt. When the meltblown fabric conveyed by the mesh curtain 214 passes through the cooling position, the centrifugal fan 221 generates negative pressure on the air vent of the inner pipe 227 through the outer pipe 222 and the inner pipe 227, thereby cooling the mesh curtain 214 that is conveyed through the air vent, thus achieving the cooling and shaping of the meltblown fabric on the mesh curtain 214. In addition, multiple partition plates 224 are provided in the inner pipe 227 to perform multi-area air cooling on the mesh curtain 214 above the air vent. Furthermore, inclined plates 2281 and arc plates 220 are provided on the side of the air vent, so that the external air passes around the upper and lower surface edges of the mesh curtain 214 in sequence to cool the meltblown fabric at the edge of the mesh curtain 214. The cooled and formed meltblown fabric continues to be conveyed to the peeling position by the mesh curtain 214, so as to... Figure 4 and Figure 5 Taking the indicated orientation as an example, under the drive of the first motor 52, the eccentric rod 53 drives the swing rod 55 to rotate through the connecting rod 54. When the swing rod 55 rotates counterclockwise, the active ratchet 56 engages with the ratchet 57 to rotate counterclockwise. Under the engagement of the active ratchet 56 and the ratchet 57, the peeling end of the peeling plate 510 on one side of the active ratchet 56 continuously rubs against the surface of the mesh curtain 214, thereby realizing the peeling effect of the peeling plate 510 on the meltblown fabric. When the first motor 52 continues to drive, the eccentric rod 53 drives the swing rod 55 to rotate through the connecting rod 54. When the swing arm 55 rotates clockwise, the active ratchet 56 drives the peeling plate 510 to move in the second direction. At this time, under the constraint of the driven ratchet 58 on the ratchet 57, the ratchet 57 stops rotating. Under the action of the second torsion spring, the active ratchet 56, under the abutment constraint of the ratchet of the ratchet 57, realizes that the active ratchet 56 drives the peeling plate 510 to swing intermittently, so that the outer arc surface of the peeling plate 510 intermittently lifts the meltblown cloth, thereby causing the gap between the meltblown cloth and the mesh curtain 214 to change dynamically, and causing the airflow between the meltblown cloth and the mesh curtain 214 to be disturbed. After being peeled, the meltblown fabric is guided by the peeling roller 51 to the electret electrostatic mechanism 3 for electret treatment, and then continues to be slit and wound by the slit and winding mechanism 4 to obtain a roll of meltblown fabric of the required size with good filtration performance.

[0041] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A fully degradable nonwoven fabric processing equipment, characterized in that, The application relates to a melt-blowing mechanism (1) for extruding a fiber-like melt, a receiving mechanism (2) comprising a receiving assembly (21) comprising a screen curtain (214) for receiving the extruded fiber-like melt, a cooling assembly (22) arranged on the side of the screen curtain (214) away from the melt-blowing mechanism (1) for cooling and shaping the received fiber-like melt, and a stripping assembly (5) comprising a stripping plate (510) and a stripping drive assembly, the output end of the stripping drive assembly being in transmission connection with the stripping plate (510), the stripping plate (510) being arranged between the screen curtain (214) and the stripped melt-blowing fabric. When the stripping plate (510) moves in a first direction under the drive of the stripping drive assembly, the stripping end of the stripping plate (510) continuously rubs against the surface of the screen curtain (214); when the stripping plate (510) moves in a second direction under the drive of the stripping drive assembly, the stripping end of the stripping plate (510) intermittently rubs against the surface of the screen curtain (214), wherein the first direction and the second direction are opposite. The stripping drive assembly comprises a driving ratchet (56), a ratchet wheel (57), a driven ratchet (58) and a reciprocating drive assembly, the ratchet wheel (57) is rotationally arranged on a side plate (211) which is arranged on a base (23), one side of the ratchet wheel (57) is engaged with the driven ratchet (58), the driven ratchet (58) is rotationally arranged on the side plate (211) through a mounting shaft, a first torsional spring is sleeved on the mounting position of the side plate (211), the stripping plate (510) is rotationally connected on a connecting shaft (59), a second torsional spring is sleeved on the rotational position of the connecting shaft (59), the end of the stripping plate (510) is fixedly connected with the driving ratchet (56), the driving ratchet (56) is in transmission cooperation with the ratchet wheel (57), the output end of the reciprocating drive assembly is in transmission connection with the driving ratchet (56), and the reciprocating drive assembly is used for driving the driving ratchet (56) to drive the stripping plate (510) to move in the first direction and the second direction respectively. The reciprocating drive assembly comprises a first motor (52), an eccentric rod (53), a connecting rod (54) and a swing rod (55), the first motor (52) is fixedly arranged on the side plate (211), the output end of the first motor (52) is in transmission connection with the eccentric rod (53), the outer end of the eccentric rod (53) is rotationally connected with the connecting rod (54), one end of the connecting rod (54) away from the eccentric rod (53) is rotationally connected with the swing rod (55), one side of the swing rod (55) is rotationally arranged on the side plate (211), and the swing rod (55) is fixedly connected with the connecting shaft (59), wherein the fixed connection point of the swing rod (55) and the connecting shaft (59), the rotational connection point of the swing rod (55) and the side plate (211) and the rotational connection point of the swing rod (55) and the connecting rod (54) are in triangular distribution.

2. The full-degradable nonwoven fabric processing apparatus according to claim 1, wherein ​ 3. The fully degradable nonwoven fabric processing apparatus according to claim 2, wherein ​ 4. The full-degradable nonwoven fabric processing apparatus according to claim 3, wherein The peeling assembly (5) further comprises a peeling roller (51) arranged on the side of the peeling plate (510) away from the screen curtain (214), and the surface of the peeling roller (51) is in frictional abutment with the side of the melt-blown cloth peeled off and facing the screen curtain (214).

5. The fully degradable nonwoven fabric processing apparatus according to claim 4, wherein The receiving assembly (21) comprises a driving roller (215), a driven roller (212) and an abutting roller (213), which are respectively mounted on the side plate (211), the screen curtain (214) is arranged outside the driving roller (215) and the driven roller (212), and the abutting roller (213) abuts on one side of the receiving surface of the screen curtain (214), wherein the input end of the driving roller (215) is drivingly connected with the second motor (216).

6. The fully degradable nonwoven fabric processing apparatus according to claim 5, wherein The cooling assembly (22) comprises a centrifugal fan (221), an outer pipeline (222), an inner pipeline (227) and a partition plate (224), the inner pipeline (227) is arranged below the receiving area of the screen curtain (214), and a blowhole opposite to the screen curtain (214) is formed on the side of the inner pipeline (227) facing the screen curtain (214), a plurality of partition plates (224) are arranged in the inner pipeline (227), the partition plates (224) divide the air extraction area of the inner pipeline (227) into a plurality of areas, and the output end of the inner pipeline (227) is in communication with the input end of the centrifugal fan (221) through the outer pipeline (222). The inner pipeline (227) is provided with a filter partition plate (225) penetrating the plurality of partition plates (224).

7. The fully degradable nonwoven fabric processing apparatus according to claim 6, wherein The blowhole position of the inner pipeline (227) is provided with a support (228), and the front and rear sides of the support (228) are respectively fixedly provided with support strips (229) along the conveying direction of the screen curtain (214), the upper surfaces of the support strips (229) are in frictional abutment with the lower surface of the screen curtain (214), the support (228) is fixedly provided with a pressing plate (223), the part of the pressing plate (223) below the screen curtain (214) is provided with an inclined plate (2281), the upper surface position of the support strips (229) is higher than the upper surface position of the pressing plate (223), and the upper side of the pressing plate (223) is fixedly provided with an arc plate (220), and the concave arc surface of the arc plate (220) faces the edge position of the screen curtain (214).

8. The fully degradable nonwoven fabric processing apparatus according to claim 7, wherein The full-degradable non-woven fabric processing equipment further comprises a stationary electrostatic mechanism (3) arranged on one side of the receiving mechanism (2), and the stationary electrostatic mechanism (3) is used for performing stationary treatment on the melt-blown cloth passing through the electric field area of the stationary electrostatic mechanism (3).

9. The fully degradable nonwoven fabric processing apparatus according to claim 8, wherein The full-degradation non-woven fabric processing device further comprises a slitting and winding mechanism (4) arranged on the side of the electret static mechanism (3) away from the receiving mechanism (2), the slitting and winding mechanism (4) comprises a first guide roller (41), a slitting cutter (42), a second guide roller (43), a winding power roller (44) and an air inflation shaft (45), the stripped melt-blown fabric sequentially passes through the first guide roller (41), the second guide roller (43), the winding power roller (44) and the air inflation shaft (45), and the slitting cutter (42) is arranged between the first guide roller (41) and the second guide roller (43), and the power input end of the winding power roller (44) is drivingly connected with a driving member.

10. A method for processing a fully degradable nonwoven fabric, characterized by, The full-degradation non-woven fabric processing method comprises the following steps: Step one, melt-extruding full-degradation polymer chips into fibrous melt through the melt-blowing mechanism (1); Step two, receiving the extruded fibrous melt by the screen curtain (214) in the receiving mechanism (2) and conveying it to a cooling position along with the screen curtain (214); Step three, cooling and forming the fibrous melt conveyed to the cooling position by the cooling assembly (22); Step four, stripping the melt-blown fabric from the screen curtain (214) by the stripping assembly (5), wherein when the stripping plate (510) moves in the first direction, the stripping end of the stripping plate (510) continuously rubs against the surface of the screen curtain (214); then when the stripping plate (510) moves in the second direction, the stripping end of the stripping plate (510) intermittently rubs against the surface of the screen curtain (214).

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