Edge suction system for improving flatness of rolled edge of hot air non-woven fabric

Abstract

The invention discloses an edge suction system for improving the flatness of the rolled edge of a hot air non-woven fabric, and belongs to the technical field of non-woven fabric processing.The edge suction system comprises an edge suction mechanism, a forming mechanism, a rolling mechanism, a conveying mechanism and a control system, a heater for generating hot air and a fan are arranged in the forming mechanism, and the rolling mechanism is provided with a rolling shaft rod driven by a motor; a circularly rotating conveying belt is wound on the conveying mechanism; the edge suction mechanism is composed of two edge suction assemblies, each edge suction assembly comprises a fixing support, the fixing support is provided with a linear guide rail extending in the transverse direction, the bottom of each linear guide rail is movably connected with an edge suction pressing plate, one side, away from the other edge suction assembly, of each edge suction pressing plate is provided with an edge suction cover, and one side of each fixing support is provided with a negative pressure fan communicated with the corresponding edge suction cover. The control system is used for controlling the linear guide rail to operate and enabling the two edge suction pressing plates to move in the opposite directions or in the opposite directions. The flatness of the edge of the non-woven fabric roll can be improved, and the utilization rate of a fiber material is increased.

Description

Technical Field

[0001] The invention relates to the technical field of non-woven fabric processing, and in particular to an edge suction system for improving the flatness of the rolled edge of a hot air non-woven fabric. Background Art

[0002] Non-woven fabrics are widely used in many industries such as medical, environmental protection, and home furnishing. The production of non-woven fabrics is mainly divided into processes such as fiber preparation, laying into a web, and bonding or fixing of the fiber web. In order to ensure that the width of the produced non-woven fabrics is the same, the edge suction device is usually used to use negative pressure to suck the fibers at the edge of the fiber web, so that the fiber web maintains a consistent width on the surface of the conveyor belt, and the fibers with uneven laying at the edge of the fiber web can be recycled to improve the quality of the non-woven fabric; however, the fibers in the fiber web are staggered and stacked, and the strength of the connection between the fibers is inconsistent, while the negative pressure suction force generated by the edge suction device is constant. After the edge suction device sucks the edge of the fiber web, some fibers will still be involved in the edge of the fiber web, resulting in uneven hair on the edge of the fiber web after it is fixed and formed into a non-woven fabric. At the same time, if the negative pressure suction force of the edge suction device is increased, it will only absorb more fibers and cannot solve the burr phenomenon. In addition, during the non-woven fabric process, the tension on the non-woven fabric will change due to the gradual increase in the winding diameter, and the non-woven fabric material is soft and elastic, which will cause the edges of both ends of the non-woven fabric roll obtained by winding to be uneven and bullet-shaped, that is, as the non-woven fabric in the non-woven fabric roll is wound to a certain length, the width of the non-woven fabric in the non-woven fabric roll will gradually decrease. In order to ensure the flatness of the edge of the non-woven fabric roll, the edge of the non-woven fabric roll needs to be cut off with a larger width in the subsequent slitting process, resulting in a large amount of waste. If the flatness of the edge of the non-woven fabric roll can be improved, the waste generated in the slitting process can be reduced, and the waste of materials and the production cost of non-woven fabrics can be reduced.

[0003] A Chinese patent with announcement number CN112877915B discloses a non-woven fabric laying device with a hair edge suction system and its application in non-woven fabric production, comprising a first oblique curtain and a frame, a first flat curtain and a laying slide are arranged above the frame, a ring curtain is arranged on the laying slide and the driving roller, the driving roller is connected to the right-angle reducer through a chain, the right-angle reducer is axially connected to the ring curtain motor, a second flat curtain is also arranged on the laying slide, a laying trolley is arranged below the laying slide, the laying trolley is connected to the reciprocating drive roller through a chain, the reciprocating drive roller is connected to the second motor through a chain, two output rollers are arranged at the bottom of the laying trolley, a bottom flat curtain is arranged below the frame, a pressing roller is arranged on the right side of the frame, a conveying curtain is arranged on the right side of the pressing roller, a hair suction pipe is arranged on the right side of the conveying curtain, a hair suction port and a sliding sleeve are arranged on the hair suction pipe, the inner diameter of the sliding sleeve is arranged to be adapted to the outer diameter of the hair suction pipe, the hair suction pipe is connected to the hair storage box through a conveying pipe, and a suction fan is arranged on the hair storage box.

[0004] The above-mentioned non-woven fabric laying device adopts a hair suction tube to absorb the excess edges of the fiber web to keep the width of the fiber web consistent. However, the fiber web after being sucked by the hair suction tube is still difficult to avoid the burrs formed by the entanglement between the fibers. Moreover, even if the fiber web keeps the same width, after being fixed to form a non-woven fabric and rolled up, as the rolling length increases, the rolling tension changes, the internal support force of the non-woven fabric roll is relatively low, and other factors affect the rolled non-woven fabric roll. The rolled non-woven fabric roll will be in the shape of a bullet head. When the non-woven fabric roll is subsequently cut, a large amount of waste will be generated, resulting in a large amount of material waste. Therefore, the above-mentioned non-woven fabric laying device still has room for improvement. Summary of the invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes a suction edge system for improving the flatness of the rolled edge of the hot air non-woven fabric, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: A suction edge system for improving the flatness of the rolled edge of a hot air nonwoven fabric, comprising a suction edge mechanism, a forming mechanism, a rolling mechanism, a transmission mechanism, and a control system, wherein the suction edge mechanism, the forming mechanism, and the rolling mechanism are arranged in sequence along the longitudinal direction, a heater and a fan for generating hot air are arranged inside the forming mechanism, the rolling mechanism is provided with a rolling shaft driven by a motor, the transmission mechanism extends from one end of the suction edge mechanism away from the forming mechanism to the inside of the forming mechanism, and a transmission belt that circulates from the suction edge mechanism toward the forming mechanism is wound on the surface of the transmission mechanism; The edge suction mechanism is composed of two groups of edge suction components, the two groups of edge suction components are respectively located above the transmission mechanism and are arranged in a transverse mirror symmetry, the edge suction components include the following structure, a fixed bracket, the fixed bracket is provided with a linear guide rail extending in the transverse direction, the bottom of the linear guide rail is movably connected with an edge suction pressure plate extending in the longitudinal direction, a gap is provided between the bottom end of the edge suction pressure plate and the upper surface of the transmission mechanism to allow the transmission mechanism to rotate, an edge suction cover is provided on the side of the edge suction pressure plate away from the other edge suction component, and a negative pressure fan connected to the edge suction cover is provided on one side of the fixed bracket; The control system is used to control the operation of the linear guide rail and to enable the two edge suction pressing plates to move toward or away from each other.

[0006] As a further technical solution of the present invention, when the winding mechanism starts to wind up the non-woven fabric, the control system controls the linear guide rail to operate and adjusts the distance between the two edge suction pressure plates to X. When the winding mechanism winds up the non-woven fabric to a set length, the control system controls the linear guide rail to operate and gradually adjusts the distance between the two edge suction pressure plates to Y, where X<Y.

[0007] As a further technical solution of the present invention, when the winding mechanism winds up the hot air non-woven fabric to a length of 80% to 95% of the set length of the non-woven fabric roll, the control system controls the linear guide rail to operate and causes the two edge suction pressure plates to move in opposite directions.

[0008] As a further technical solution of the present invention, the opening of the edge suction cover faces the upper surface of the conveyor belt, and the edge suction cover extends outward at the lateral edge of the conveyor belt.

[0009] As a further technical solution of the present invention, the linear guide rail is composed of an adjustment slide rail and an adjustment slider that match each other, and the adjustment slider is fixedly connected to the edge suction pressure plate.

[0010] As a further technical solution of the present invention, the two adjustment slide rails in the two groups of edge suction assemblies are on the same straight line.

[0011] As a further technical solution of the present invention, the surface of the edge suction pressing plate is coated with an anti-stick coating.

[0012] As a further technical solution of the present invention, the edge suction pressing plate is tilted upward at one end away from the forming mechanism to form an inlet end, and the distance between the inlet end and the upper surface of the conveyor belt gradually decreases along the rotation direction of the conveyor belt.

[0013] The beneficial effects of the present invention are: The present invention adjusts the width of the fiber web during transmission through an edge suction mechanism. During the process, the edge suction pressure plate linearly divides the excess fibers at the lateral edge of the fiber web, and the excess fibers are sucked up by a negative pressure fan and an edge suction hood and then recycled, thereby obtaining a fiber web with a stable width and smooth edges. The fiber web is subsequently formed by hot air heating and bonding in a forming mechanism, and then rolled up by a rolling mechanism to obtain a non-woven fabric roll with smooth edges. When the edge of the non-woven fabric roll being rolled up shrinks due to tension changes, internal softness and other factors, the two edge suction pressure plates are driven by a linear guide to move in opposite directions to increase the width of the fiber web, thereby preventing the edge of the non-woven fabric roll from continuing to shrink and improving its edge smoothness. The edge material generated by the non-woven fabric roll in the slitting process can be reduced, thereby improving material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The invention discloses a structural schematic diagram of an edge suction system for improving the flatness of the rolled edge of a hot air nonwoven fabric.

[0015] Figure 2 The invention discloses a left view of an edge suction mechanism of an edge suction system for improving the flatness of the rolled edge of a hot air nonwoven fabric.

[0016] Figure 3 The invention discloses a left view of an edge suction component of an edge suction system for improving the flatness of the rolled edge of a hot air nonwoven fabric.

[0017] Figure 4 The present invention is a front view of an edge suction component of an edge suction system for improving the flatness of the rolled edge of a hot air nonwoven fabric.

[0018] Figure 5The invention discloses a structural schematic diagram of an edge suction component of an edge suction system for improving the flatness of the rolled edge of a hot air nonwoven fabric.

[0019] Figure 6 It is a structural schematic diagram of the first non-woven fabric roll obtained by rolling up the hot air non-woven fabric after processing it in the prior art.

[0020] Figure 7 The invention discloses a structural schematic diagram of a second non-woven fabric roll obtained by rolling up a hot air non-woven fabric after processing the hot air non-woven fabric by an edge suction system for improving the flatness of the rolled edge of the hot air non-woven fabric.

[0021] Wherein: edge suction mechanism 1, edge suction assembly 11, fixed bracket 111, linear guide rail 112, adjustment slide rail 1121, adjustment slider 1122, edge suction pressure plate 113, confluence end 1131, edge suction cover 114, negative pressure fan 115, forming mechanism 2, winding mechanism 3, winding shaft rod 31, transmission mechanism 4, transmission belt 41, fiber web 5, hot air non-woven fabric 6, first non-woven fabric roll 7, second non-woven fabric roll 8. DETAILED DESCRIPTION

[0022] The implementation modes of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation modes of the present invention are not limited to the following embodiments, and the present invention relates to relevant necessary components in the technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0023] like Figures 1 to 5 As shown, a suction edge system for improving the flatness of the rolled edge of a hot air nonwoven fabric comprises a suction edge mechanism 1, a forming mechanism 2, a rolling mechanism 3, a transmission mechanism 4, and a control system. The suction edge mechanism 1, the forming mechanism 2, and the rolling mechanism 3 are arranged in sequence along the longitudinal direction. A heater and a fan for generating hot air are arranged inside the forming mechanism 2. The rolling mechanism 3 is provided with a rolling shaft 31 driven by a motor. The transmission mechanism 4 extends from one end of the suction edge mechanism 1 away from the forming mechanism 2 to the inside of the forming mechanism 2. A transmission belt 41 that circulates from the suction edge mechanism 1 toward the forming mechanism 2 is wound on the surface of the transmission mechanism 4. The edge suction mechanism 1 is composed of two edge suction components 11, which are respectively located above the transmission mechanism 4 and are arranged in a transverse mirror symmetry. The edge suction component 11 includes the following structure: a fixed bracket 111, the fixed bracket 111 is provided with a linear guide rail 112 extending in the transverse direction, and the bottom of the linear guide rail 112 is movably connected with an edge suction pressure plate 113 extending in the longitudinal direction, and a gap is provided between the bottom end of the edge suction pressure plate 113 and the upper surface of the transmission mechanism 4 to allow the transmission mechanism 4 to rotate, and an edge suction cover 114 is provided on the side of the edge suction pressure plate 113 away from the other edge suction component 11, and a negative pressure fan 115 connected to the edge suction cover 114 is provided on one side of the fixed bracket 111; The control system is used to control the operation of the linear guide rail 112 and to make the two edge suction pressing plates 113 move toward or away from each other.

[0024] The present invention is mainly used for the production and processing of hot air non-woven fabrics. A web laying machine for laying fibers into a fiber web 5 is provided on the side of the edge suction mechanism 1 away from the forming mechanism 2. The web laying machine lays the fibers on the upper surface of the conveyor belt 41 of the conveyor mechanism 4 to form a fiber web 5. The conveyor mechanism 4 drives the conveyor belt 41 to rotate through a motor, so that the fiber web 5 is conveyed toward the forming mechanism 2 at the edge of the side of the edge suction mechanism 1 close to the web laying machine. When the fiber web 5 is conveyed on the surface of the conveyor belt 41, it will first be conveyed through the edge suction mechanism 1. The edge suction mechanism 1 adjusts the width of the fiber web 5 through two edge suction pressing plates 113, so that the fiber web 5 maintains a fixed width and enters the forming process. In the mechanism 2, the fiber web 5 is transmitted in the forming mechanism 2 through a number of transmission rollers, and at the same time, a hot air flow is generated in the internal space through a heater and a fan. The hot air flow penetrates between the fibers of the fiber web 5 during the circulation flow in the forming mechanism 2, and heats the low-melting-point components in the fibers until they are melted, thereby allowing the fibers in the fiber web 5 to bond to each other. The bonded fiber web 5 is cooled and formed in the forming mechanism 2 to obtain a hot air non-woven fabric 6. The hot air non-woven fabric 6 is wound on the surface of the winding shaft 31, and then the winding shaft 31 is driven to rotate by a motor to roll up the hot air non-woven fabric 6 to obtain a non-woven fabric roll of a certain length.

[0025] When the non-woven fabric starts to be produced, that is, when the winding mechanism 3 needs to start winding a new non-woven fabric roll, the control system controls the linear guide rail 112 to operate and adjusts the distance between the two edge suction pressing plates 113 to X, that is, the width of the non-woven fabric roll is set to X, and the width of the fiber web 5 to be laid needs to be greater than X. When the fiber web 5 is transmitted to the position of the edge suction mechanism 1, since the thickness direction of the edge suction pressing plate 113 is the same as the transverse direction of the conveyor belt 41, the fiber web 5 will be cut into three parts by the two edge suction pressing plates 113 during the transmission process of the conveyor mechanism 4, and the largest part of the fiber web 5 is between the two edges. Between the edge suction pressing plates 113, the width of this part of the fiber web 5 is X and is subsequently formed into a hot air non-woven fabric 6 by hot air heating and bonding in the forming mechanism 2. The other two parts are the edges on both sides of the fiber web 5 and are respectively located under the edge suction covers 114 of the two edge suction components 11. The negative pressure fan 115 will run synchronously when the non-woven fabric starts to be produced. The negative pressure suction force generated during its operation acts on the lateral edge of the fiber web 5 through the edge suction cover 114, so that the fibers at the lateral edge of the fiber web 5 are extracted and recycled into the fiber raw material, and then re-laid as the fiber web 5, thereby improving material utilization.

[0026] During the transmission process of the fiber web 5 on the surface of the transmission mechanism 4, the excess fibers on the edge are continuously absorbed and recovered by the edge suction mechanism 1, and the width of the fiber web 5 is stably adjusted to X and then transmitted to the forming mechanism 2 to be formed into a hot air non-woven fabric 6 through hot air bonding. Subsequently, the hot air non-woven fabric 6 leaves the forming mechanism 2 and is gradually wound on the surface of the winding shaft 31 of the winding mechanism 3 to obtain a non-woven fabric roll. When the winding mechanism 3 winds up the non-woven fabric to a set length, the set value is the length value of the non-woven fabric roll. The set value is usually set based on past experience, that is, based on the experience of non-woven fabric production, it is summarized that after the non-woven fabric is rolled up to a certain length, the edges of the hot air non-woven fabric 6 at both ends begin to shrink. The set value needs to be comprehensively set according to the thickness of the hot air non-woven fabric 6. This is because the higher the thickness of the hot air non-woven fabric 6, the higher the fluffiness and softness, which will cause edge shrinkage at a lower winding length. Therefore, the higher the thickness of the hot air non-woven fabric 6, the lower the set value needs to be set.

[0027] When the non-woven fabric roll is rolled up to the set length, the control system controls the linear guide rail 112 to run and gradually adjusts the distance between the two edge suction plates 113 to Y, where X<Y. At this time, the two edge suction plates 113 will move in opposite directions to increase the distance between them. The width of the fiber web 5 between the two edge suction plates 113 will increase, and the width of the hot air non-woven fabric 6 formed by the forming mechanism 2 will also increase. The increased width of the hot air non-woven fabric 6 will offset the width of the edge shrinkage caused by tension changes, internal softness and other factors in the non-woven fabric roll, thereby ensuring that the edges of the two ends of the rolled non-woven fabric roll will not be bullet-shaped, thereby improving the flatness of the edges of the two ends of the non-woven fabric roll. At the same time, in the slitting process of the non-woven fabric roll, only a small amount of the edge of the non-woven fabric roll needs to be cut off to ensure the flatness of the non-woven fabric roll after slitting, thereby reducing material waste and the production cost of non-woven fabrics.

[0028] In the prior art, the hot air nonwoven fabric obtained by processing and forming is rolled up to obtain a first nonwoven fabric roll 7, such as Figure 6 As shown in FIG. 1 , the edges of both ends of the first non-woven fabric roll 7 shrink inwardly. When the first non-woven fabric roll 7 is subsequently cut, the inwardly shrunk portion needs to be completely cut off, thereby generating a large amount of edge material that is difficult to recycle. The hot air non-woven fabric 6 processed by the present invention is rolled up to obtain a second non-woven fabric roll 8, as shown in FIG. Figure 7 As shown, the edges of both ends of the second non-woven fabric roll 8 are smoother. When the second non-woven fabric roll 8 is subsequently cut, only a small part of the edge needs to be cut off to further improve the smoothness. The cutting produces less edge material, reducing material waste.

[0029] It should be noted that during the process of adjusting the width of the fiber web 5 through the edge suction mechanism 1, since the thickness direction of the edge suction pressure plate 113 is the same as the lateral direction of the conveyor belt 41, the edge suction pressure plate 113 plays a role similar to a cutting knife and cuts the fiber web 5 to ensure the stability of the width of the fiber web 5. At the same time, the edge suction pressure plate 113 can have a blocking effect, blocking the fiber web 5 between the two edge suction pressure plates 113 and the edge suction cover, avoiding the negative pressure suction force generated by the negative pressure fan 115 from acting on the fiber web 5 between the two edge suction pressure plates 113. At this time, the negative pressure fan 115 can generate a larger negative pressure suction force by running at a higher power, thereby completely absorbing the fibers cut by the edge suction pressure plate 113 on the lateral edge of the fiber web 5, which can avoid the burr phenomenon caused by the mutual traction between the fibers on the lateral edge of the fiber web 5, improve the flatness of the edge of the hot air non-woven fabric 6 after hot air bonding, and also improve the flatness of the edges at both ends of the non-woven fabric roll.

[0030] Furthermore, if there are burrs on the lateral edges of the fiber web 5, during the bonding and molding process of the fiber web 5 in the molding mechanism 2, the burrs of the fiber web 5 are more sparse and easier to be heated to a molten state, and the strength of the connection between the fibers in the burrs and the fiber web 5 is relatively low, resulting in the burrs of the fiber web 5 being easily stuck to the surface of the conveyor belt 41. The conveyor belt 41 is usually made of plastic material, and it is very difficult to clean the burrs after they are stuck to the conveyor belt 41. As more and more burrs are stuck to the surface of the conveyor belt 41, the normal production of the non-woven fabric will be affected. Therefore, a new conveyor belt 41 needs to be replaced. The edge suction mechanism 1 of the present invention can avoid the burrs on the lateral edges of the fiber web 5, thereby avoiding the burrs from sticking to the surface of the conveyor belt 41, ensuring the normal and smooth production of the non-woven fabric, and increasing the service life of the conveyor belt 41.

[0031] Furthermore, a fiber recovery pipe is connected to one end of the negative pressure fan 115 away from the edge suction hood 114. The negative pressure suction force generated by the negative pressure fan 115 acts on the lateral edge of the fiber web 5 through the edge suction hood 114, thereby absorbing the excess fibers at the lateral edge of the fiber web 5. The absorbed fibers are guided to the web laying machine through the fiber recovery pipe. These fibers are still in a loose fiber state, so they can be re-combed in the web laying machine and re-laid as the fiber web 5 on the surface of the conveyor belt 41; and after the fiber web 5 is formed into a non-woven fabric through hot air bonding, the fibers inside it are bonded to each other, and the fibers in the edge material obtained by cutting the edge of the non-woven fabric in the subsequent slitting process will not be in a loose state, and can usually only be mixed with the raw materials for re-melting, but the fibers of the hot air non-woven fabric 6 usually contain two components with different melting temperatures, and cannot be mixed with the raw materials of a certain component for re-melting, and the recycling of these edge materials is challenging; therefore, the solution of the present invention to reduce the edge cutting edge material by improving the flatness of the edge of the non-woven fabric roll has the significance of reducing costs in actual production, and can improve material utilization.

[0032] Furthermore, a photoelectric sensor, a laser sensor or other sensors can be provided near the end of the winding shaft 31 of the winding mechanism 3. These sensors can monitor the position and shape of the edge of the non-woven fabric roll in real time, so as to determine whether the edge of the non-woven fabric roll has shrunk due to tension changes, internal softness or other factors. When edge shrinkage of the non-woven fabric roll is detected, the width of the fiber web 5 can be increased in real time through the edge suction mechanism 1, so as to avoid further shrinkage of the edge of the non-woven fabric roll and improve the flatness of the edge of the non-woven fabric roll.

[0033] In summary, the present invention adjusts the width of the fiber web 5 during transmission through the edge suction mechanism 1. During the process, the edge suction pressure plate 113 linearly divides the excess fibers at the lateral edge of the fiber web 5, and the excess fibers are sucked by the negative pressure fan 115 and the edge suction hood 114 and then recycled, thereby obtaining a fiber web 5 with a stable width and smooth edges. The fiber web 5 is subsequently formed by hot air heating and bonding in the forming mechanism 2 and then rolled up by the rolling mechanism 3 to obtain a non-woven fabric roll with smooth edges. When the edge of the non-woven fabric roll being rolled up shrinks due to tension changes, internal softness and other factors, the two edge suction pressure plates 113 are driven by the linear guide rail 112 to move in opposite directions to increase the width of the fiber web 5, thereby preventing the edge of the non-woven fabric roll from continuing to shrink and improving its edge smoothness. The edge material generated by the non-woven fabric roll in the slitting process can be reduced, thereby improving material utilization.

[0034] As one of the preferred embodiments of the present invention, when the winding mechanism 3 winds up the hot air non-woven fabric 6 to a length of 80% to 95% of the set length of the non-woven fabric roll, the control system controls the linear guide rail 112 to operate and causes the two edge suction pressure plates 113 to move in opposite directions; during the winding process of the hot air non-woven fabric 6 in the winding mechanism 3, when it is wound to 80% to 95% of the set length of the non-woven fabric roll, the edges of both ends of the non-woven fabric roll will begin to shrink. This is because the hot air non-woven fabric 6 that has been wound in the non-woven fabric roll is relatively thick and its surface has a high degree of softness. The support force of the subsequently wound hot air non-woven fabric 6 on the surface of the non-woven fabric roll becomes smaller and smaller. At the same time, the diameter of the hot air non-woven fabric 6 will become larger and larger, and the hot air non-woven fabric 6 will be wound to a larger and larger diameter. The bonding and forming speed of the over-forming mechanism 2 is constant, so the tension applied to the hot air non-woven fabric 6 during the winding process will become greater and greater. Under the influence of the increased tension and the reduced supporting force, the lateral ends of the hot air non-woven fabric 6 will gradually shrink, thereby making the two ends of the non-woven fabric roll in a bullet shape. By controlling the linear guide rail 112 to operate through the control system and making the two edge suction pressure plates 113 move in opposite directions, the width of the fiber web 5 can be increased, thereby increasing the width of the hot air non-woven fabric 6 leaving the forming mechanism 2. The increased width of the hot air non-woven fabric 6 can offset the shrinkage distance at its two ends, thereby making the edges of the two ends of the non-woven fabric roll smoother, which can reduce the edge material generated by the non-woven fabric roll in the slitting process and improve material utilization.

[0035] As one of the preferred embodiments of the present invention, the opening of the edge suction hood 114 faces the upper surface of the conveyor belt 41, and the edge suction hood 114 extends outward at the lateral edge of the conveyor belt 41; the edge suction hood 114 can more easily absorb the fibers on the upper surface of the conveyor belt 41 through the opening by negative pressure, and the edge suction mechanism 1 usually requires negative pressure to absorb excess fibers at the lateral edges of the fiber web 5, and controls the width of the fiber web 5 by adjusting the distance between the two edge suction pressure plates 113. When the two edge suction pressure plates 113 move toward each other, the edge suction hood 114 extending outward at the lateral edge of the conveyor belt 41 can completely recover the fibers at the edge of the fiber web 5 by covering a larger area of ​​the fiber web 5, thereby avoiding fibers remaining on the surface of the conveyor belt 41.

[0036] like Figure 2 As shown, as one of the preferred embodiments of the present invention, the linear guide 112 is composed of an adjustment rail 1121 and an adjustment slider 1122 that match each other. The two adjustment rails 1121 in the two groups of edge suction assemblies 11 are on the same straight line, and the adjustment slider 1122 is fixedly connected to the edge suction pressure plate 113; in the linear guide 112, the adjustment slider 1122 is driven by a motor and moves along the adjustment rail 1121. The adjustment slider 1122 can move precisely along the adjustment rail 1121, thereby accurately adjusting the distance between the two edge suction pressure plates 113, thereby obtaining a wide and stable hot air non-woven fabric 6.

[0037] As one of the preferred embodiments of the present invention, the surface of the edge suction pressure plate 113 is coated with an anti-stick coating; the anti-stick coating is preferably a Teflon wear-resistant coating, which can reduce the friction on the surface of the edge suction pressure plate 113, so that the edge suction pressure plate 113 can smoothly cut the fiber web 5, and the anti-stick coating can also make the surface of the edge suction pressure plate 113 have anti-stick properties, thereby preventing the fibers in the fiber web 5 from adhering to the surface of the edge suction pressure plate 113, thereby ensuring that the edge suction pressure plate 113 can smoothly cut the fiber web 5; in addition, before the anti-stick coating is applied to the surface of the edge suction pressure plate 113, sandblasting treatment can be performed to improve the anti-stick properties of the surface of the edge suction pressure plate 113 after the anti-stick coating is applied.

[0038] like Figure 4As shown, as one of the preferred embodiments of the present invention, the edge suction pressure plate 113 is tilted upward at one end away from the forming mechanism 2 to form an inlet end 1131, and the distance between the inlet end 1131 and the upper surface of the conveyor belt 41 gradually decreases along the rotation direction of the conveyor belt 41; during the transmission of the fiber web 5 on the surface of the conveyor belt 41, the fiber web 5 will first contact the inlet end 1131 of the edge suction pressure plate 113, and the inlet end 1131 is tilted upward so that the bottom of the edge suction pressure plate 113 first contacts the surface of the fiber web 5 and then gradually embeds into the fiber web 5, thereby realizing flexible cutting of the fiber web 5, and avoiding large resistance when the fiber web 5 contacts the edge suction pressure plate 113, thereby reducing the cutting seam generated when the fiber web 5 is cut by the edge suction pressure plate 113, and improving the flatness of the cut edge of the fiber web 5.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A suction edge system for improving the flatness of the rolled edge of a hot air nonwoven fabric, comprising a suction edge mechanism (1), a forming mechanism (2), a rolling mechanism (3), a transmission mechanism (4), and a control system, characterized in that: The edge suction mechanism (1), the forming mechanism (2), and the reeling mechanism (3) are arranged in sequence along the longitudinal direction; a heater and a fan for generating hot air are arranged inside the forming mechanism (2); the reeling mechanism (3) is provided with a reeling shaft (31) driven by a motor; the transmission mechanism (4) extends from an end of the edge suction mechanism (1) away from the forming mechanism (2) to the inside of the forming mechanism (2); a transmission belt (41) is wound on the surface of the transmission mechanism (4) and circulates from the edge suction mechanism (1) toward the forming mechanism (2); The edge suction mechanism (1) is composed of two groups of edge suction components (11), the two groups of edge suction components (11) are respectively located above the transmission mechanism (4) and are arranged in a transverse mirror symmetry, the edge suction components (11) include the following structure, a fixed bracket (111), the fixed bracket (111) is provided with a linear guide rail (112) extending in the transverse direction, the bottom of the linear guide rail (112) is movably connected to an edge suction pressure plate (113) extending in the longitudinal direction, a gap is provided between the bottom end of the edge suction pressure plate (113) and the upper surface of the transmission mechanism (4) to allow the transmission mechanism (4) to rotate, an edge suction cover (114) is provided on the side of the edge suction pressure plate (113) away from the other edge suction component (11), and a negative pressure fan (115) connected to the edge suction cover (114) is provided on one side of the fixed bracket (111); The control system is used to control the operation of the linear guide rail (112) and to enable the two edge suction pressing plates (113) to move towards or away from each other.

2. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: When the rewinding mechanism (3) starts to rewind the non-woven fabric, the control system controls the linear guide rail (112) to operate and adjusts the distance between the two edge suction pressing plates (113) to X; when the rewinding mechanism (3) rewinds the non-woven fabric to a set length, the control system controls the linear guide rail (112) to operate and gradually adjusts the distance between the two edge suction pressing plates (113) to Y, wherein X<Y.

3. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: When the rewinding mechanism (3) rewinds the hot air non-woven fabric to a length of 80% to 95% of the set length of the non-woven fabric roll, the control system controls the linear guide rail (112) to operate and causes the two edge suction pressing plates (113) to move in opposite directions.

4. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: The opening of the edge suction cover (114) faces the upper surface of the conveyor belt (41), and the edge suction cover (114) extends outwards at the lateral edge of the conveyor belt (41).

5. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: The linear guide rail (112) is composed of an adjustment slide rail (1121) and an adjustment slider (1122) that match each other, and the adjustment slider (1122) is fixedly connected to the edge suction pressure plate (113).

6. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 5, characterized in that: The two adjustment slide rails (1121) in the two groups of edge suction components (11) are on the same straight line.

7. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: The surface of the edge suction pressing plate (113) is coated with an anti-stick coating.

8. The edge suction system for improving the flatness of the rolled edge of hot air nonwoven fabric according to claim 1, characterized in that: One end of the edge suction pressing plate (113) away from the forming mechanism (2) is tilted upward to form an inlet end (1131), and the distance between the inlet end (1131) and the upper surface of the conveyor belt (41) gradually decreases along the rotation direction of the conveyor belt (41).

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