CN111206335B - Method for producing non-woven fabric by adopting vertical needle machine - Google Patents
Method for producing non-woven fabric by adopting vertical needle machine Download PDFInfo
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- CN111206335B CN111206335B CN202010133903.2A CN202010133903A CN111206335B CN 111206335 B CN111206335 B CN 111206335B CN 202010133903 A CN202010133903 A CN 202010133903A CN 111206335 B CN111206335 B CN 111206335B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H18/00—Needling machines
- D04H18/02—Needling machines with needles
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Abstract
The invention relates to a method for producing non-woven fabric by adopting a vertical needle machine, which uses the vertical needle machine and comprises a rack, a conveying unit, a needle punching unit, a power mechanism and a winding device, wherein the conveying unit comprises a needle feeding unit, a plurality of conveying roller pairs, a first tensioning mechanism, a plurality of guide rollers and a second tensioning mechanism; the needling unit comprises a first needling mechanism, a second needling mechanism and a plurality of screen plates; the first needling mechanism and the second needling mechanism are arranged up and down; the fiber web is conveyed by the conveying unit, after one side of the fiber web is respectively needled by the upper needling needles and the lower needling needles of the first needling mechanism, the fiber web is conveyed to the second needling mechanism by the guide roller, the other side of the fiber web is needled by the upper needling needles and the lower needling needles of the second needling mechanism, and then the fiber web is output and wound and formed by the winding device. The equipment used by the invention can be used for needling two sides of the same fiber web, has small floor area and can efficiently produce the non-woven fabric with uniform performance.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a method for producing non-woven fabrics by adopting a vertical needle machine.
Background
Nonwoven fabrics, also known as non-woven fabrics and non-woven fabrics, are made of oriented or random fibers, are a new generation of environmentally friendly materials, and are called fabrics because of their appearance and certain properties. The non-woven fabric has no warp and weft, is very convenient to cut and sew, is light in weight and easy to shape, and is popular with hand fans. In the prior art, when producing a nonwoven fabric, a fiber web is usually processed into a nonwoven fabric on one production line, and the nonwoven fabric is produced by repeatedly puncturing the fiber web in a direction perpendicular to the fiber web by using a needle machine to allow fibers in the fiber web to be mutually cohered and wound. However, when the existing needling equipment is used for producing non-woven fabrics, the production efficiency is low, the two sides of the same fiber web cannot be needled simultaneously, or the occupied area is large, so that the production cost is not favorably saved.
Patent application CN201621014526.6 discloses a double-sided needle machine for non-woven fabrics, which comprises a power part, a conveying curtain, a needle punching part and an output part, wherein the conveying curtain, the needle punching part and the output part are sequentially arranged in the advancing direction of the non-woven fabrics; the needling part comprises a needle bed, lower needling fixedly arranged on the lower end face of the needle bed, a lower mesh stripping plate arranged below the lower needling and a lower trawl plate fixedly arranged below the lower mesh stripping plate; the needle bed is fixedly connected with the power part; the output part comprises an output roller driven by a motor, and the needling part further comprises an upper needling fixedly arranged on the upper end surface of the needle bed, an upper mesh stripping plate arranged above the upper needling, and an upper trawl plate fixedly arranged above the upper mesh stripping plate. Through this kind of setting for the needle loom can carry out twice acupuncture to the non-woven fabrics as required, perhaps carries out once acupuncture, efficiency promotion one time to the non-woven fabrics as required. However, this equipment does not allow simultaneous needling of both sides of the same web. Meanwhile, when the first embodiment of the patent application is adopted to prepare the nonwoven fabric, if the needled fiber web is conveyed, the machine must be stopped, which is not beneficial to improving the production efficiency.
Based on the above problems, how to needle both sides of the same fiber web, and also improve the production efficiency and reduce the floor area is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for producing non-woven fabric by using a vertical needle machine, the vertical needle machine used in the method can be used for needling two surfaces of the same fiber web, the occupied area is small, and the non-woven fabric with uniform performance can be produced efficiently.
In order to achieve the purpose, the invention provides the following technical scheme:
firstly, a vertical needling machine is designed. This vertical needle loom, including frame, conveying unit, acupuncture unit, power unit and take-up device, its characterized in that: the conveying unit comprises a needle feeding unit, a plurality of conveying roller pairs, a first tensioning mechanism, a plurality of guide rollers and a second tensioning mechanism; the needle feeding unit comprises a needle belt and a mesh belt which are respectively arranged up and down, the needle belt is wound on the plurality of belt rollers, and the mesh belt is wound on the plurality of mesh belt conveying rollers; the needling unit comprises a first needling mechanism, a second needling mechanism and a plurality of screen plates; the first needling mechanism and the second needling mechanism are arranged up and down; the power mechanism provides needling power for the needling mechanism; the first needling mechanism and the second needling mechanism both comprise an upper needle and a lower needle which are arranged on the needle plate; the fiber web is conveyed by the conveying unit, after one side of the fiber web is respectively needled by the upper needling needles and the lower needling needles of the first needling mechanism, the fiber web is conveyed to the second needling mechanism by the guide roller, the other side of the fiber web is needled by the upper needling needles and the lower needling needles of the second needling mechanism, and then the fiber web is output and wound and formed by the winding device.
Preferably, the needle belt of the needle feeding unit is wound on three belt rollers which are distributed in a triangular shape, namely a first belt roller, a second belt roller and a third belt roller; the first belt roller and the third belt roller are horizontally arranged; the mesh belt is wound on two horizontally arranged mesh belt conveying rollers. Thus, the mesh belt is parallel to the needle belt between the first belt roller and the third belt roller, and a certain gap is formed so as to facilitate the preliminary needle punching after the fiber web is fed. Furthermore, the plane in which the second and third belt rollers lie is at an acute angle (preferably 15-60 °) to the horizontal, which arrangement facilitates the progressive insertion of the needles of the needle belts into the web as it enters the space between the mesh belt and the needle belts located between the first and third belt rollers. The mesh belt is arranged such that the needles of the needle belt penetrate the web and reach the perforations of the mesh belt when penetrating the web. If a conventional non-apertured belt is provided for transport, the needles are too long and can cut the belt and too short and cannot penetrate the web completely. The fiber web is fed by the needle feeding unit, so that the fiber web can be subjected to primary needling, the strength of the fiber web is increased, and the fiber web is not easy to break or damage due to tension when passing through the first tensioning mechanism and the second tensioning mechanism in the subsequent process.
Preferably, the first tensioning mechanism comprises a first elastic guide roller and a first spring, one end of the first spring is arranged on the radial side surface of the first elastic guide roller, and the other end of the first spring is fixedly connected with the rack; the second tensioning mechanism comprises a second elastic guide roller and a second spring, one end of the second spring is arranged on the radial side face of the second elastic guide roller, and the other end of the second spring is fixedly connected with the rack. During operation, the first tensioning mechanism and the second tensioning mechanism can tension the fiber web to ensure uniform tension of the fiber web.
Preferably, the conveying unit comprises a pricking pin feeding unit, a first conveying roller pair, a second conveying roller pair, a first tensioning mechanism, a third conveying roller pair, a fourth conveying roller pair, a first guide roller, a second guide roller, a third guide roller, a fifth conveying roller pair, a sixth conveying roller pair, a second tensioning mechanism, a seventh conveying roller pair, an eighth conveying roller pair, a fourth guide roller and a ninth conveying roller pair which are arranged in sequence, the ninth conveying roller pair outputs the needled fiber web, and the winding device winds the fiber web for forming; a first lower screen plate and a first upper screen plate are arranged between the first conveying roller pair and the second conveying roller pair; a second upper screen plate and a second lower screen plate are arranged between the third conveying roller pair and the fourth conveying roller pair; a second screen plate pair consisting of the second upper screen plate and the second lower screen plate and a first screen plate pair consisting of the first lower screen plate and the first upper screen plate are arranged in an up-down corresponding mode so that the first needling mechanism can conveniently needle the fiber web; a third lower screen plate and a third upper screen plate are arranged between the fifth conveying roller pair and the sixth conveying roller pair; a fourth upper screen plate and a fourth lower screen plate are arranged between the seventh conveying roller pair and the eighth conveying roller pair; and a fourth screen plate pair consisting of the fourth upper screen plate and the fourth lower screen plate and a third screen plate pair consisting of the third lower screen plate and the third upper screen plate are arranged in an up-down corresponding mode so as to facilitate the second needling mechanism to needle the fiber web.
Preferably, first conveying roller pair and second conveying roller pair, third conveying roller pair and fourth conveying roller pair, fifth conveying roller pair and sixth conveying roller pair and seventh conveying roller pair and eighth conveying roller pair are the level setting respectively to do benefit to the acupuncture and go on smoothly.
In the invention, the first needling mechanism and the second needling mechanism can move up and down to needle the fiber web. The first tensioning mechanism and the second tensioning mechanism in the invention not only can adjust the tension of the fiber web, but also have the function of steering.
When the fiber web is needled in the first needling mechanism, the first tensioning mechanism is arranged between the second conveying roller pair and the third conveying roller pair, after the first needling mechanism needles the fiber web positioned between the first conveying roller pair and the second conveying roller pair, the first needling mechanism can draw out the lower needling needle and then move upwards to prepare for needling the fiber web positioned between the third conveying roller pair and the fourth conveying roller pair by utilizing the upper needling, in the time gap, the first conveying roller pair and the second conveying roller pair can convey the fiber web with a certain length forwards (at the moment, the needling feeding unit adaptively feeds the fiber web with a corresponding length forwards), the third conveying roller pair and the fourth conveying roller pair are kept stationary, at the moment, the fiber webs with certain length output by the first conveying roller pair and the second conveying roller pair can lengthen the fiber web positioned between the second conveying roller pair and the third conveying roller pair, due to the presence of the first tensioning mechanism, the length of the web is maintained under tension between the second and third pairs of feed rollers by the action of the first spring and the first resilient guide roller. When the upper pricking pin of the first pricking mechanism pricks the fiber web between the third conveying roller pair and the fourth conveying roller pair, the third conveying roller pair and the fourth conveying roller pair are rotated to convey the fiber web forward for a certain length, so that the fiber web with a certain length output by the first conveying roller pair and the second conveying roller pair forwards moves; the first and second conveyor roller pairs remain stationary at this time. Due to the presence of the first tensioning mechanism, the web length between the second and third pair of conveyor rollers is shortened and can also be maintained in a tensioned state.
Similarly, a second tensioning mechanism is provided between the sixth conveyor roller pair and the seventh conveyor roller pair. After the fiber web needled by the first needling mechanism passes through the first guide roller, the second guide roller and the third guide roller, the fiber web is fed to the vicinity of a second needling mechanism positioned on the lower side of the machine frame through a fifth conveying roller pair, after the fiber web positioned between the fifth conveying roller pair and a sixth conveying roller pair is needled by utilizing the downward needling of the second needling mechanism, the second needling mechanism can draw out the downward needling needle and then move upward to prepare for needling the fiber web positioned between the seventh conveying roller pair and an eighth conveying roller pair by utilizing the upward needling, in the time interval, the fifth conveying roller pair and the sixth conveying roller pair can convey the fiber web with a certain length forward, the seventh conveying roller pair and the eighth conveying roller pair are kept still, at the moment, the fiber web with a certain length output by the fifth conveying roller pair and the sixth conveying roller pair can lengthen the fiber web positioned between the sixth conveying roller pair and the seventh conveying roller pair, due to the second tensioning mechanism, the length of the web is kept tensioned by the second spring and the second elastic guide roller between the sixth and seventh pairs of feed rollers. When needling is carried out on the fiber web positioned between the seventh conveying roller pair and the eighth conveying roller pair by the needling mechanism, the seventh conveying roller pair and the eighth conveying roller pair are rotated to convey the fiber web forward for a certain length, so that the fiber web with a certain length output by the fifth conveying roller pair and the sixth conveying roller pair forwards moves; the fifth and sixth conveyor roller pairs remain stationary at this time. Due to the presence of the second tensioning mechanism, the web length between the sixth and seventh conveyor roller pairs is shortened and can also be kept tensioned.
Therefore, the needling of the two sides of the fiber web is completed, the tension of the fiber web is kept uniform in the moving process of the fiber web, and the production efficiency is high.
In the production process of the non-woven fabric, the first lower screen plate, the second lower screen plate, the third lower screen plate and the fourth lower screen plate all have a supporting effect on a fiber web, the first upper screen plate and the third upper screen plate can prevent a needling mechanism from taking away fibers in the fiber web when a lower felting needle is pulled out, and the second upper screen plate and the fourth upper screen plate can limit the fiber web between the upper screen plate and the lower screen plate when the needling mechanism performs needling on the fiber web so as to prevent the fiber web from moving upwards.
The invention also provides a method for producing the non-woven fabric by adopting the vertical needle machine, which comprises the following steps:
step one, preparing a fiber web: preparing a fiber web for producing a non-woven fabric, and installing a needle feeding unit on a needle machine, wherein the needle feeding unit comprises a needle belt and a mesh belt which are respectively arranged up and down, the needle belt is wound on a plurality of belt rollers, and the mesh belt is wound on a plurality of mesh belt conveying rollers; after being subjected to preliminary needling by the felting needle feeding unit, the fiber web sequentially passes through a first conveying roller pair, a gap between a first upper screen plate and a first lower screen plate, a second conveying roller pair, a first tensioning mechanism, a third conveying roller pair, a gap between a second upper screen plate and a second lower screen plate, a fourth conveying roller pair, a first guide roller, a second guide roller, a third guide roller, a fifth conveying roller pair, a gap between a third upper screen plate and a third lower screen plate, a sixth conveying roller pair, a second tensioning mechanism, a seventh conveying roller pair, a gap between a fourth upper screen plate and a fourth lower screen plate, an eighth conveying roller pair, a fourth guide roller and a ninth conveying roller pair and then reaches a winding device;
step two, first needling: the first needling mechanism is driven by the power mechanism, and the lower needling of the first needling mechanism is utilized to needle the fiber web positioned between the first upper screen plate and the first lower screen plate; when the lower pricker of the first pricking mechanism is pulled out, the first conveying roller pair and the second conveying roller pair are rotated to convey a section of fiber web forwards, the third conveying roller pair and the fourth conveying roller pair are kept still, and the first tensioning mechanism tensions the fiber web positioned between the second conveying roller pair and the third conveying roller pair; needling the fiber web between the second upper screen plate and the second lower screen plate by utilizing the upper needling of the first needling mechanism; when the upper pricker of the first pricking mechanism is pulled out, the third conveying roller pair and the fourth conveying roller pair are rotated to convey a section of fiber web forwards, the first conveying roller pair and the second conveying roller pair are kept still, the fiber web positioned between the second conveying roller pair and the third conveying roller pair is conveyed forwards to be shortened, and meanwhile, the first tensioning mechanism keeps the fiber web in a tensioned state continuously;
step three, needling again: the fiber web needled in the step two passes through a first guide roller, a second guide roller and a third guide roller, is reversed and is conveyed by a fifth conveying roller pair and a sixth conveying roller pair; the power mechanism drives the second needling mechanism, and the lower needling of the second needling mechanism is used for needling the fiber web positioned between the third upper screen plate and the third lower screen plate; when the lower pricker of the second needling mechanism is pulled out, the fifth conveying roller pair and the sixth conveying roller pair are rotated to convey a section of fiber web forwards, the seventh conveying roller pair and the eighth conveying roller pair are kept still, and the second tensioning mechanism is used for tensioning the fiber web positioned between the sixth conveying roller pair and the seventh conveying roller pair; needling the fiber web positioned between the fourth upper screen plate and the fourth lower screen plate by utilizing the upper needling of the second needling mechanism; when the upper pricker of the second needling mechanism is pulled out, the seventh conveying roller pair and the eighth conveying roller pair are rotated to convey a length of the fiber web forward, the fifth conveying roller pair and the sixth conveying roller pair are kept still, the fiber web positioned between the sixth conveying roller pair and the seventh conveying roller pair is conveyed forward to be shortened, and meanwhile, the second tensioning mechanism keeps the fiber web in a tensioned state;
step four, winding and forming: and (4) enabling the fiber web finally output in the step three to pass through a fourth guide roller and a ninth conveying roller pair, and then winding and forming the fiber web by a winding device to obtain the non-woven fabric.
Preferably, the respective pairs of conveying rollers keep the web length uniform every time the web is conveyed forward.
Of course, before the step four-roll forming, a post-processing step is also included. In this way, the needled web can be subjected to various post-treatment sequences, such as heat treatment, glue spraying, etc., as required.
Advantageous effects
Compared with the prior art, the invention has the following beneficial effects: the invention provides a method for producing non-woven fabric by using a vertical needle machine, wherein the vertical needle machine used in the method can be used for needling two surfaces of the same fiber web, the occupied area is small, and the non-woven fabric with uniform performance can be produced efficiently.
The used needle machine adopts a vertical design by arranging two sets of needle mechanisms up and down, thereby saving the occupied space. When the fiber web is fed, the fiber web firstly passes through the needling mechanism on the upper part and then passes through the needling mechanism on the lower part, so that the winding device is arranged on the lower side, and the winding device is favorable for carrying a package after winding and forming.
When the non-woven fabric is prepared, the first tensioning mechanism and the second tensioning mechanism are arranged, so that the fiber webs of all parts in the conveying unit are always in a tensioned state, the uniform tension of the fiber webs is facilitated, the needling density during needling is uniform, and the performance of the finally formed non-woven fabric is uniform.
In the web feed section, a needle feed unit comprising a needle belt and a mesh belt is provided, which enables the web to be subjected to preliminary needling before entering the needling unit or the like. This advantageously increases the strength of the web so that the web is less likely to break when entering the first and second tensioning mechanisms, particularly when the needle loom is initially introducing the web in preparation for producing a nonwoven. This is also for adapting the arrangement of the first tensioning mechanism and the second tensioning mechanism, and is also one of the inventions of the present invention.
Drawings
FIG. 1 is an overall schematic view of a needle loom of the present invention.
Reference numerals:
1. a fiber web; 2. a barbed tape; 3. a first conveying roller pair; 4. a first lower mesh plate; 5. a first upper screen plate; 6. a second conveying roller pair; 7. a first elastic guide roller; 8. a first spring; 9. a third conveying roller pair; 10. a second upper screen plate; 11. a second lower net plate; 12. a fourth conveying roller pair; 13. a first guide roller; 14. a second guide roller; 15. a third guide roller; 16. a fifth conveying roller pair; 17. a third lower net plate; 18. a third upper screen plate; 19. a sixth conveying roller pair; 20. a second elastic guide roller; 21. a second spring; 22. a seventh conveying roller pair; 23. a fourth lower net plate; 24. a fourth upper screen plate; 25. an eighth conveying roller pair; 26. a fourth guide roller; 27. a ninth conveying roller pair; 28. a winding device; 29. a first needling mechanism; 30. a second needling mechanism; 31. a mesh belt transfer roller; 32. a mesh belt; 33. a first belt roller; 34. a second belt roller; 35. a third belt roller.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, a vertical needling machine is designed, which comprises a frame, a conveying unit, a needling unit, a power mechanism and a winding device 28, and is characterized in that: the conveying unit comprises a needle feeding unit, a plurality of conveying roller pairs, a first tensioning mechanism, a plurality of guide rollers and a second tensioning mechanism; the needle feeding unit comprises a needle belt 2 and a mesh belt 32 which are respectively arranged up and down, the needle belt 2 is encircled on a plurality of belt rollers, and the mesh belt 32 is encircled on a plurality of mesh belt 32 conveying rollers 31; the needling unit comprises a first needling mechanism 29, a second needling mechanism 30 and a plurality of screen plates; the first needling mechanism 29 and the second needling mechanism 30 are arranged up and down; the power mechanism provides needling power for the needling mechanism; the first needling mechanism 29 and the second needling mechanism 30 each include an upper needle and a lower needle provided on a needle plate; the web 1 is conveyed by the conveying unit, after one side of the web 1 is needled by the upper needles and the lower needles of the first needling mechanism 29, respectively, the web 1 is conveyed to the second needling mechanism 30 by the guide roller, and the other side of the web 1 is needled by the upper needles and the lower needles of the second needling mechanism 30, and then the web is output and wound by the winding device 28 for forming.
The needle belt 2 of the needle feeding unit is surrounded on three belt rollers which are distributed in a triangular shape, namely a first belt roller 33, a second belt roller 34 and a third belt roller 35; the first belt roller 33 and the third belt roller 35 are horizontally arranged; the mesh belt 32 is wound around two horizontally arranged mesh belt 32 conveying rollers 31. Thus, the mesh belt 32 and the needle belt 2 between the first belt roller 33 and the third belt roller 35 are parallel to each other and have a certain gap so that the web 1 is fed and then preliminarily needled. Furthermore, the plane in which the second belt roller 34 and the third belt roller 35 lie is at an acute angle (preferably 15-60 °) to the horizontal, which arrangement facilitates the progressive insertion of the needles of the needle belt 2 into the fibrous web 1 as the fibrous web 1 enters the space between the mesh belt 32 and the needle belt 2 between the first belt roller 33 and the third belt roller 35. Mesh belt 32 is provided so that the needles of needle belt 2 penetrate web 1 and reach the perforations of mesh belt 32 as they penetrate web 1. If a conventional non-apertured belt is provided for transport, the needles are too long and can cut the belt and too short and cannot penetrate web 1 completely. The fiber web 1 is fed by the needle feeding unit, so that the fiber web 1 can be subjected to primary needling, the strength of the fiber web 1 is increased, and the fiber web 1 is not easy to break or damage due to tension when passing through the first tensioning mechanism and the second tensioning mechanism in the subsequent process.
The first tensioning mechanism comprises a first elastic guide roller 7 and a first spring 8, one end of the first spring 8 is arranged on the radial side surface of the first elastic guide roller 7, and the other end of the first spring 8 is fixedly connected with the rack; the second tensioning mechanism comprises a second elastic guide roller 20 and a second spring 21, one end of the second spring 21 is arranged on the radial side surface of the second elastic guide roller 20, and the other end of the second spring 21 is fixedly connected with the rack. In operation, the first tensioning mechanism and the second tensioning mechanism can tension the web 1 to ensure that the web 1 is uniformly tensioned.
The conveying unit comprises a needle feeding unit, a first conveying roller pair 3, a second conveying roller pair 6, a first tensioning mechanism, a third conveying roller pair 9, a fourth conveying roller pair 12, a first guide roller 13, a second guide roller 14, a third guide roller 15, a fifth conveying roller pair 16, a sixth conveying roller pair 19, a second tensioning mechanism, a seventh conveying roller pair 22, an eighth conveying roller pair 25, a fourth guide roller 26 and a ninth conveying roller pair 27 which are arranged in sequence, the ninth conveying roller pair 27 outputs the needled fiber web 1, and a winding device 28 winds the fiber web to form; a first lower screen plate 4 and a first upper screen plate 5 are arranged between the first conveying roller pair 3 and the second conveying roller pair 6; a second upper screen plate 10 and a second lower screen plate 11 are arranged between the third conveying roller pair 9 and the fourth conveying roller pair 12; a second screen plate pair consisting of a second upper screen plate 10 and a second lower screen plate 11 and a first screen plate pair consisting of a first lower screen plate 4 and a first upper screen plate 5 are arranged in an up-and-down corresponding mode so that the first needling mechanism 29 can needle the fiber web 1 conveniently; a third lower screen plate 17 and a third upper screen plate 18 are arranged between the fifth conveying roller pair 16 and the sixth conveying roller pair 19; a fourth upper screen plate 24 and a fourth lower screen plate 23 are arranged between the seventh conveying roller pair 22 and the eighth conveying roller pair 25; the fourth screen plate pair composed of the fourth upper screen plate 24 and the fourth lower screen plate 23 and the third screen plate pair composed of the third lower screen plate 17 and the third upper screen plate 18 are arranged in an up-down corresponding manner, so that the second needling mechanism 30 can needle the fiber web 1.
First conveying roller pair 3 and second conveying roller pair 6, third conveying roller pair 9 and fourth conveying roller pair 12, fifth conveying roller pair 16 and sixth conveying roller pair 19, and seventh conveying roller pair 22 and eighth conveying roller pair 25 are the level setting respectively to do benefit to the acupuncture and go on smoothly.
In the present invention, the first needling mechanism 29 and the second needling mechanism 30 are both capable of moving up and down to needle the web 1. The first tensioning mechanism and the second tensioning mechanism in the present invention not only can adjust the tension of the web 1, but also have a steering effect.
When the web 1 is needled in the first needling mechanism 29, the first tensioning mechanism is arranged between the second conveyor roller pair 6 and the third conveyor roller pair 9, after the first needling mechanism 29 needles the web 1 between the first conveyor roller pair 3 and the second conveyor roller pair 6, the first needling mechanism 29 draws out the lower needles and then moves upward in preparation for needling the web 1 between the third conveyor roller pair 9 and the fourth conveyor roller pair 12 by using the upper needles, in this time interval, the first conveyor roller pair 3 and the second conveyor roller pair 6 can convey a certain length of the web 1 forward (at this time, the feeding unit adaptively feeds the corresponding length of the needles forward), the third conveyor roller pair 9 and the fourth conveyor roller pair 12 remain stationary, at this time, the certain length of the web 1 output by the first conveyor roller pair 3 and the second conveyor roller pair 6 can lengthen the length of the web 1 between the second conveyor roller pair 6 and the third conveyor roller pair 9, due to the presence of the first tensioning mechanism, the length of the web 1 will be such that the web 1 between the second and third pairs of feed rollers 6, 9 will be kept tensioned by the first spring 8 and the first resilient guide roller 7. When the needling of the first needling mechanism 29 is performed on the fiber web 1 positioned between the third conveying roller pair 9 and the fourth conveying roller pair 12, the third conveying roller pair 9 and the fourth conveying roller pair 12 are rotated to convey the fiber web 1 forward by a certain length, so that the fiber web 1 of a certain length output by the first conveying roller pair 3 and the second conveying roller pair 6 before moves forward; the first conveyor roller pair 3 and the second conveyor roller pair 6 are now held stationary. Due to the presence of the first tensioning mechanism, the length of the web 1 between the second conveyor roller pair 6 and the third conveyor roller pair 9 becomes short and also can be maintained in a tensioned state.
Similarly, a second tensioning mechanism is arranged between the sixth conveyor roller pair 19 and the seventh conveyor roller pair 22. The web 1 needled by the first needling mechanism 29 is fed through the first guide roller 13, the second guide roller 14, the third guide roller 15, through the fifth transport roller pair 16 to the vicinity of the second needling mechanism 30 located on the lower side of the machine frame, after the web 1 located between the fifth transport roller pair 16 and the sixth transport roller pair 19 is needled by the lower needle of the second needling mechanism 30, the lower needle is drawn out by the second needling mechanism 30 and then moved upward in preparation for needling the web 1 located between the seventh transport roller pair 22 and the eighth transport roller pair 25 by the upper needle, and in this time interval, the fifth transport roller pair 16 and the sixth transport roller pair 19 can feed forward a length of the web 1, the seventh transport roller pair 22 and the eighth transport roller pair 25 remain stationary, and the length of the web 1 fed by the fifth transport roller pair 16 and the sixth transport roller pair 19 at this time interval causes the length of the web 1 located between the sixth transport roller pair 19 and the seventh transport roller pair 22 to be the web 1 The length of the web 1 is lengthened due to the second tensioning mechanism, and the web 1 between the sixth and seventh pairs of feed rollers 19, 22 is maintained in a tensioned state by the second spring 21 and the second elastic guide roller 20. After the needling of the web 1 between the seventh transport roller pair 22 and the eighth transport roller pair 25 by the needling mechanism 30, the seventh transport roller pair 22 and the eighth transport roller pair 25 are rotated to transport the web 1 forward by a length such that the length of web 1 previously output by the fifth transport roller pair 16 and the sixth transport roller pair 19 is advanced; the fifth conveyor roller pair 16 and the sixth conveyor roller pair 19 are now held stationary. Due to the presence of the second tensioning mechanism, the length of the web 1 between the sixth transport roller pair 19 and the seventh transport roller pair 22 becomes short and also the tensioned state can be maintained.
Thus, the needling of both sides of the fiber web 1 is completed, and the uniform tension of the fiber web 1 is maintained in the moving process of the fiber web 1, and the production efficiency is high.
In the production process of the non-woven fabric, the first lower screen plate 4, the second lower screen plate 11, the third lower screen plate 17 and the fourth lower screen plate 23 all have a supporting effect on the fiber web 1, the first upper screen plate 5 and the third upper screen plate 18 can prevent a needling mechanism from taking away fibers in the fiber web 1 when the lower needling is pulled out, and the second upper screen plate 10 and the fourth upper screen plate 24 can limit the fiber web 1 between the upper screen plate and the lower screen plate when the needling mechanism punches the fiber web 1, so that the fiber web 1 is prevented from moving upwards.
The invention also provides a method for producing the non-woven fabric by adopting the vertical needle machine, which comprises the following steps:
step one, preparing a fiber net 1: preparing a web 1 for producing a nonwoven fabric, mounting a needle feeding unit on a needle loom, the needle feeding unit including a needle belt 2 and a mesh belt 32 disposed up and down, respectively, the needle belt 2 being wound around a plurality of belt rollers, the mesh belt 32 being wound around a plurality of mesh belt 32 conveying rollers 31; after being subjected to the preliminary needling by the needle feeding unit, the fiber web 1 sequentially passes through a first conveying roller pair 3, a gap between a first upper screen plate 5 and a first lower screen plate 4, a second conveying roller pair 6, a first tensioning mechanism, a third conveying roller pair 9, a gap between a second upper screen plate 10 and a second lower screen plate 11, a fourth conveying roller pair 12, a first guide roller 13, a second guide roller 14, a third guide roller 15, a fifth conveying roller pair 16, a gap between a third upper screen plate 18 and a third lower screen plate 17, a sixth conveying roller pair 19, a second tensioning mechanism, a seventh conveying roller pair 22, a gap between a fourth upper screen plate 24 and a fourth lower screen plate 23, an eighth conveying roller pair 25, a fourth guide roller 26 and a ninth conveying roller pair 27, and then reaches a winding device 28;
step two, first needling: the first needling mechanism 29 is driven by a power mechanism, and the lower needles of the first needling mechanism 29 are used for needling the fiber web 1 between the first upper screen plate 5 and the first lower screen plate 4; while the lower needle of the first needle punching mechanism 29 is pulled out, the first feed roller pair 3 and the second feed roller pair 6 are rotated to feed a length of the web 1 forward, the third feed roller pair 9 and the fourth feed roller pair 12 are kept stationary, and the first tensioning mechanism tensions the web 1 between the second feed roller pair 6 and the third feed roller pair 9; the web 1 between the second upper screen plate 10 and the second lower screen plate 11 is needled with the upper needles of the first needling mechanism 29; when the upper needle of the first needling mechanism 29 is pulled out, the third conveying roller pair 9 and the fourth conveying roller pair 12 are rotated to convey a length of the web 1 forward, the first conveying roller pair 3 and the second conveying roller pair 6 are kept still, the web 1 between the second conveying roller pair 6 and the third conveying roller pair 9 is conveyed forward to be shortened, and meanwhile, the first tensioning mechanism keeps tensioning the web 1;
step three, needling again: the fiber web 1 after the second needle punching passes through a first guide roller 13, a second guide roller 14 and a third guide roller 15, then the fiber web 1 is reversed, and is conveyed by a fifth conveying roller pair 16 and a sixth conveying roller pair 19; the power mechanism drives the second needling mechanism 30, and the lower needling of the second needling mechanism 30 is used for needling the fiber web 1 positioned between the third upper screen plate 18 and the third lower screen plate 17; while the lower needle of the second needling mechanism 30 is being pulled out, the fifth transport roller pair 16 and the sixth transport roller pair 19 are rotated to transport a length of web 1 forward, the seventh transport roller pair 22 and the eighth transport roller pair 25 remain stationary, and the second tensioning mechanism tensions the web 1 between the sixth transport roller pair 19 and the seventh transport roller pair 22; needling the fiber web 1 positioned between the fourth upper screen plate 24 and the fourth lower screen plate 23 by using the upper needling of the second needling mechanism 30; while the upper needles of the second needling mechanism 30 are pulled out, the seventh transport roller pair 22 and the eighth transport roller pair 25 are rotated to transport a length of web 1 forward, the fifth transport roller pair 16 and the sixth transport roller pair 19 are kept stationary, and the web 1 located between the sixth transport roller pair 19 and the seventh transport roller pair 22 is thereby transported forward to be shortened while the second tensioning mechanism continues to maintain the web 1 in a tensioned state;
step four, winding and forming: the web 1 finally output in the third step is wound and molded by a winding device 28 after passing through a fourth guide roller 26 and a ninth conveying roller pair 27, and a nonwoven fabric is obtained.
Preferably, each pair of conveying rollers conveys the web 1 forward while the length of the web 1 conveyed each time is kept uniform.
Of course, before the step four-roll forming, a post-processing step is also included. In this way, the needled web 1 can be subjected to various post-treatment sequences, such as heat treatment, glue spraying, etc., as desired.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A method for producing non-woven fabric by using a vertical needle machine comprises the following steps:
step one, preparing a fiber web: preparing a fiber web for producing a non-woven fabric, and installing a needle feeding unit on a needle machine, wherein the needle feeding unit comprises a needle belt and a mesh belt which are respectively arranged up and down, the needle belt is wound on a plurality of belt rollers, and the mesh belt is wound on a plurality of mesh belt conveying rollers; after being subjected to preliminary needling by the felting needle feeding unit, the fiber web sequentially passes through a first conveying roller pair, a gap between a first upper screen plate and a first lower screen plate, a second conveying roller pair, a first tensioning mechanism, a third conveying roller pair, a gap between a second upper screen plate and a second lower screen plate, a fourth conveying roller pair, a first guide roller, a second guide roller, a third guide roller, a fifth conveying roller pair, a gap between a third upper screen plate and a third lower screen plate, a sixth conveying roller pair, a second tensioning mechanism, a seventh conveying roller pair, a gap between a fourth upper screen plate and a fourth lower screen plate, an eighth conveying roller pair, a fourth guide roller and a ninth conveying roller pair and then reaches a winding device;
step two, first needling: the first needling mechanism is driven by the power mechanism, and the lower needling of the first needling mechanism is utilized to needle the fiber web positioned between the first upper screen plate and the first lower screen plate; when the lower pricker of the first pricking mechanism is pulled out, the first conveying roller pair and the second conveying roller pair are rotated to convey a section of fiber web forwards, the third conveying roller pair and the fourth conveying roller pair are kept still, and the first tensioning mechanism tensions the fiber web positioned between the second conveying roller pair and the third conveying roller pair; needling the fiber web between the second upper screen plate and the second lower screen plate by utilizing the upper needling of the first needling mechanism; when the upper pricker of the first pricking mechanism is pulled out, the third conveying roller pair and the fourth conveying roller pair are rotated to convey a section of fiber web forwards, the first conveying roller pair and the second conveying roller pair are kept still, the fiber web positioned between the second conveying roller pair and the third conveying roller pair is conveyed forwards to be shortened, and meanwhile, the first tensioning mechanism keeps the fiber web in a tensioned state continuously;
step three, needling again: the fiber web needled in the step two passes through a first guide roller, a second guide roller and a third guide roller, is reversed and is conveyed by a fifth conveying roller pair and a sixth conveying roller pair; the power mechanism drives the second needling mechanism, and the lower needling of the second needling mechanism is used for needling the fiber web positioned between the third upper screen plate and the third lower screen plate; when the lower pricker of the second needling mechanism is pulled out, the fifth conveying roller pair and the sixth conveying roller pair are rotated to convey a section of fiber web forwards, the seventh conveying roller pair and the eighth conveying roller pair are kept still, and the second tensioning mechanism is used for tensioning the fiber web positioned between the sixth conveying roller pair and the seventh conveying roller pair; needling the fiber web positioned between the fourth upper screen plate and the fourth lower screen plate by utilizing the upper needling of the second needling mechanism; when the upper pricker of the second needling mechanism is pulled out, the seventh conveying roller pair and the eighth conveying roller pair are rotated to convey a length of the fiber web forward, the fifth conveying roller pair and the sixth conveying roller pair are kept still, the fiber web positioned between the sixth conveying roller pair and the seventh conveying roller pair is conveyed forward to be shortened, and meanwhile, the second tensioning mechanism keeps the fiber web in a tensioned state;
step four, winding and forming: and (4) enabling the fiber web finally output in the step three to pass through a fourth guide roller and a ninth conveying roller pair, and then winding and forming the fiber web by a winding device to obtain the non-woven fabric.
2. The method of producing a nonwoven fabric using a vertical needle loom as set forth in claim 1, wherein: the respective pairs of conveying rollers keep the web length uniform every time the web is conveyed forward.
3. The method of producing a nonwoven fabric using a vertical needle loom as set forth in claim 1, wherein: before the step four of winding and forming, a post-processing step is also included.
4. A method of producing a nonwoven fabric using a vertical needle loom as claimed in claim 3, characterized in that: the post-treatment step is heat treatment or glue spraying.
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