Processing equipment for needle punched nonwoven fabric and its preparation process

Abstract

The application discloses a processing equipment for needle punching non-woven fabric, which comprises a rack, the rack being provided with a top base and a bottom base; two mounting plates, the two mounting plates being driven to move back and forth by a reciprocating power element; two needle plates, the needle plates being provided with a plurality of mounting holes along the thickness direction of the needle plates; a supporting plate, the supporting plate being provided with a first power element for adjusting the position of the supporting plate, the supporting plate being provided with a needle hole; a needle, the needle being in plug-in cooperation with the mounting hole; a water jet needle, the water jet needle being in plug-in cooperation with at least one plug-in hole on the mounting plate, the water jet needle being coaxially provided with a water jet hole inside, and the water jet hole being connected with a water supply mechanism. The high-pressure water jet emitted by the water jet needle and the needle are used for entangling the fibers of the non-woven fabric at the same time, the high-pressure water jet collides with the needle when passing through the non-woven fabric, the direction of the water jet is changed, the direction of the fiber entanglement can be changed, the uniformity of the fiber distribution inside the non-woven fabric is improved, and the stability and strength of the overall structure of the non-woven fabric are improved. The application further discloses a preparation process for the needle punching non-woven fabric.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven fabric processing technology, and particularly relates to a processing equipment for needle-punched nonwoven fabric and its preparation process. Background Technology

[0002] Needle-punched nonwoven fabric is made from short fibers that are entangled through a needle-punching process. It boasts high strength and excellent air permeability, making it suitable for applications in geotechnical engineering, filtration, and automotive industries. The needle-punching machine plays an indispensable role in the production of needle-punched nonwoven fabric.

[0003] Existing needle punching machines can only perform needle punching along the thickness direction of the nonwoven fabric. Single-direction needle punching causes the fibers to mainly entangle in the needle punching direction, with relatively less entanglement of fibers perpendicular to the needle punching direction. This results in uneven fiber distribution inside the nonwoven fabric, affecting the stability and strength of the overall structure.

[0004] Therefore, it is necessary to improve the existing acupuncture machines. Summary of the Invention

[0005] One of the objectives of this invention is to overcome the deficiencies in the prior art and provide a processing equipment for needle-punched nonwoven fabrics, thereby improving the quality of the processed needle-punched nonwoven fabrics.

[0006] To achieve the above objectives, the specific technical solution of the needle-punched nonwoven fabric processing equipment of the present invention is as follows: A processing device for needle-punched nonwoven fabric and its preparation process, comprising: The frame has a top mount and a base; Two mounting plates are respectively disposed on the opposite sides of the top seat and the base, the two mounting plates are arranged facing each other, and are driven to move back and forth relative to each other by a reciprocating power component; Two needle plates are detachably connected to the two mounting plates respectively. The needle plates have multiple mounting holes along their thickness direction, and the mounting holes are evenly distributed on the needle plates. A support plate is disposed on the side of the needle plate opposite to the mounting plate. The support plate is provided with a first power component for adjusting its position. The support plate has needle holes, the number of which is equal to the number of mounting holes and they correspond one-to-one. The needle holes and the mounting holes are coaxially arranged. The needles are inserted into the mounting holes and are staggered on the two needle plates. A water-jetting needle is inserted into at least one of the mounting holes on the needle plate. The water-jetting needle has a water spray hole coaxially arranged inside, and the water spray hole is connected to a water supply mechanism. Preferably, a sealing ring is fixedly connected to the side of the mounting plate adjacent to the needle plate, and the mounting plate, the needle plate and the sealing ring form a sealed water cavity for accommodating high-pressure water, and the water supply mechanism is in communication with the sealed water cavity.

[0007] Preferably, the water supply mechanism includes a water collection tank fixedly connected to the base, a filter screen is provided inside the water collection tank, a water pipe is provided between the water collection tank and the mounting plate, the water pipe is connected to the sealed water cavity, and a high-pressure pump is provided on the water pipe.

[0008] Preferably, both the needle and the water jet needle are interference-fitted with the mounting hole, and both the needle and the water jet needle have a sealing ring at their ends. One end of the mounting hole has a stepped hole for accommodating the sealing ring.

[0009] Preferably, the frame is provided with a water control mechanism, which includes two parallel guide columns fixedly connected to the frame and two squeezing rollers. Both ends of the squeezing rollers are provided with guide sleeves that slide with the guide columns. The guide sleeves are driven by a second power component to slide along the guide columns.

[0010] Preferably, the water-jetting needles on the two needle plates are coaxially arranged, and the front ends of the two water-jetting needles are facing each other.

[0011] Preferably, a water-dispersing needle is coaxially inserted into the mounting hole, the water-dispersing needle is interference-fitted with the mounting hole, a sealing ring is fixedly connected to the end of the water-dispersing needle, the water-dispersing needle and the water-jetting needle are coaxially arranged, and the front ends of the water-dispersing needle and the water-jetting needle are directly opposite each other, and the front end of the water-dispersing needle has a reflective surface for changing the direction of water flow.

[0012] Preferably, the reflecting surface is a conical surface, a spherical surface, or a plane.

[0013] Preferably, the angle between the plane and the axis of the water spray hole is 10 degrees to 90 degrees.

[0014] The second objective of this invention is to provide a process for preparing needle-punched nonwoven fabric, comprising the following steps: Step 1: Opening, using an opening machine to loosen the clumps of fiber raw materials into small fiber bundles; Step 2: Combing, using a combing machine to comb the fiber bundles into single fibers and spread the fibers into a uniform fiber web; Step 3: Needle punching, where high-pressure water sprayed from the needles and water jets of the processing equipment causes the fibers to entangle with each other to obtain a nonwoven fabric preform; Step 4: Secondary needle punching, where the fibers are further entangled by the needles of the processing equipment to obtain the finished nonwoven fabric; Step 5: Drying, using a dryer to dry the non-woven fabric; Step 6: Testing and packaging. The performance and appearance of the nonwoven fabric are tested, and the nonwoven fabric that passes the test is packaged.

[0015] The processing equipment and preparation process of the needle-punched nonwoven fabric of the present invention have the following advantages: the high-pressure water jet from the water jet needle and the needle simultaneously entangle the fibers of the nonwoven fabric. When the high-pressure water jet passes through the nonwoven fabric, it collides with the needle and changes the direction of the water jet, thereby changing the direction of fiber entanglement, so as to improve the uniformity of fiber distribution inside the nonwoven fabric and improve the stability and strength of the overall structure of the nonwoven fabric. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the processing equipment for needle-punched nonwoven fabric of the present invention; Figure 2 This is a schematic diagram of the installation structure of the water control mechanism of the present invention; Figure 3 This is a schematic diagram of the mounting structure of the needle of the present invention; Figure 4 This is a schematic diagram of the connection structure of the mounting plate, needle plate and needle of the present invention; Figure 5 for Figure 4 A sectional view; Figure 6 This is a schematic diagram of the structure of the piercing needle of the present invention; Figure 7 This is a schematic diagram of the structure of the water jet needle of the present invention; Figure 8 This is a schematic diagram of the distribution structure of the water jet needles and water dispersion needles of the present invention; The markings in the diagram are as follows: 1. Frame; 2. Water collection tank; 3. Water supply mechanism; 4. Water control mechanism; 6. Needle; 7. Water jet needle; 8. Water dispersion needle; 101. Top seat; 102. Base; 201. Filter screen; 301. High-pressure pump; 302. Water pipe; 401. Extrusion roller; 402. First cylinder; 403. Guide sleeve; 404. Guide post; 501. Reciprocating power component; 502. Mounting plate; 503. Needle plate; 504. Sealing ring; 505. Support plate; 506. Needle hole; 507. Second cylinder; 508. Mounting hole; 509. Sealed water chamber; 601. Sealing ring; 701. Water spray hole; 801. Reflector surface. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0018] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the processing equipment and are only for the purpose of describing the present invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] like Figure 1-7 As shown, a needle-punched nonwoven fabric processing device includes: Frame 1, which has a top seat 101 and a base 102; Two mounting plates 502 are respectively disposed on the opposite sides of the top seat 101 and the base 102. The two mounting plates 502 are positioned facing each other and are driven to reciprocate relative to each other by the reciprocating power component 501. Two needle plates 503 are detachably connected to two mounting plates 502 respectively. The needle plates 503 have multiple mounting holes 508 along their own thickness direction, and the mounting holes 508 are evenly distributed on the needle plates 503. The support plate 505 is located on the side of the needle plate 503 away from the mounting plate 502. The support plate 505 is provided with a first power member for adjusting its position. The support plate 505 has needle holes 506. The number of needle holes 506 and mounting holes 508 are equal and correspond one-to-one. The needle holes 506 and mounting holes 508 are coaxially arranged. The needle 6 is inserted into the mounting hole 508, and the needles 6 on the two needle plates 503 are staggered. The water jet needle 7 is inserted into at least one mounting hole 508 on the needle plate 503. The water jet needle 7 has a coaxial water spray hole 701 inside, and the water spray hole 701 is connected to the water supply mechanism 3. The aforementioned processing equipment is applicable to, but not limited to, the production of nonwoven fabrics. The reciprocating power component 501 includes a crankshaft, a motor, and a connecting rod. Power is provided by the motor, and under the transmission action of the crankshaft and connecting rod, the mounting plate 502 is driven to rapidly rise and fall, thereby driving the needles 6 on the needle plate 503 to rapidly reciprocate. The first power component is a second cylinder 507, used to adjust the distance between the two support plates 505. During operation, the fiber web passes between the two support plates 505, and the needles above and below the fiber web simultaneously needle-punch it. The fibers are tightly intertwined to form a nonwoven fabric. Water jet needles 7 are also distributed on the needle plate 503. When the water jet needles 7 rise and fall, they can inject high-pressure water into the interior of the fiber web. When the water flow comes into contact with the fiber web or with adjacent needles, it will change the direction of the water flow and scatter the water flow, so that the water flow is ejected in different directions inside the fiber web. Through the water flow, the fibers inside the fiber web will become entangled in different directions, thereby improving the uniformity of fiber distribution inside the nonwoven fabric and improving the stability and strength of the overall structure of the nonwoven fabric.

[0020] In the multi-needling process, the above-mentioned processing equipment is used first to process the non-woven fabric. Since the non-woven fabric fibers are relatively dispersed in the first one or two needle-punching processes, the water flow can better entangle the fibers in all directions after scattering inside the non-woven fabric fibers, so as to achieve uniform fiber distribution. Then, the non-woven fabric is needle-punched by a pure needle punching machine to make the fibers tightly entangled, thereby improving the strength of the non-woven fabric.

[0021] In this nonwoven fabric processing equipment, the combined use of needle punching and hydroentangling can improve the efficiency of nonwoven fabric production and increase the tightness of fiber entanglement, while hydroentangling can improve the uniformity of nonwoven fabric fiber distribution, thereby improving the production efficiency and quality of nonwoven fabric; in addition, the water flow can also dissipate heat from the needles 6 and needle plate 503 to maintain the performance of the needles and extend their service life.

[0022] Further improvements include, for example Figure 2-5 As shown, a sealing ring 504 is fixedly connected to the side of the mounting plate 502 near the needle plate 503. The mounting plate 502, needle plate 503 and sealing ring 504 enclose a sealed water cavity 509 for containing high-pressure water. The water supply mechanism 3 is connected to the sealed water cavity 509. The water supply mechanism 3 includes a water collection tank 2 fixedly connected to the base 102. A filter screen 201 is provided inside the water collection tank 2. A water pipe 302 is provided between the water collection tank 2 and the mounting plate 502. The water pipe 302 is connected to the sealed water cavity 509. A high-pressure pump 301 is provided on the water pipe 302. In the aforementioned nonwoven fabric processing equipment, the water collection tank 2 is located on both sides of the base 102, allowing water generated during equipment operation to flow into the water collection tank 2 for collection. The collected water is filtered by the filter screen 201, which reduces impurities in the water flow and keeps the water clean, preventing the water jet needles 7 from becoming clogged. Then, the high-pressure pump 301 provides power to send water into the sealed water chamber 509, and then it is ejected through each water jet needle 7. The needle plate 503 is connected to the mounting plate 502 by a bolt assembly, which improves the ease of disassembly and assembly of the needle plate 503 and facilitates the disassembly and assembly of the needles 6 and water jet needles 7. Furthermore, the water pressure inside the sealed water tank 509 acts on the water jet needles 7 and needles 6, which can apply pressure to the outside of the sealed water chamber 509, preventing the water jet needles 7 and needles 6 from falling out of the mounting hole 508 during use, thus improving the stability of equipment operation. The ejected water flows into the water collection tank 2, realizing the recycling of water flow, thereby reducing the production cost of the equipment.

[0023] Further improvements include, for example Figure 5As shown, both the needle 6 and the water jet needle 7 are interference-fitted with the mounting hole 508. A sealing ring 601 is provided at the end of both the needle 6 and the water jet needle 7. One end of the mounting hole 508 has a stepped hole for accommodating the sealing ring 601. The stepped hole limits the sealing ring 601, increasing the strength of the connection between the sealing ring 601 and the mounting hole 508, thereby improving the stability of the mounting of the water jet needle 7 and the needle 6. It also increases the contact area between the sealing ring 601 and the mounting hole 508, improving the sealing effect.

[0024] Further improvements include, for example Figure 2 As shown, a water control mechanism 4 is provided on the frame 1. The water control mechanism 4 includes two parallel guide columns 404 fixedly connected to the frame 1, and two extrusion rollers 401. Both ends of the extrusion rollers 401 are provided with guide sleeves 403 that slide in cooperation with the guide columns 404. The guide sleeves 403 are driven by a second power component to slide along the guide columns 404. The processed nonwoven fabric passes between the two extrusion rollers 401. The extrusion rollers 401 extrude the nonwoven fabric to reduce its water content, facilitating subsequent processing. The second power component is a first cylinder 402, which drives the guide sleeves 403 to slide along the guide columns 404, thereby adjusting the position of the extrusion rollers 401 mounted on the guide sleeves 403, and thus adjusting the interval between the two extrusion rollers 401, improving the extrusion effect of the extrusion rollers 401 on the nonwoven fabric.

[0025] A further improvement is that the water-jetting needles 7 located on the two needle plates 503 are coaxially arranged, and the front ends of the two water-jetting needles 7 are facing each other. In this nonwoven fabric processing equipment, the upper and lower needle plates 503 move closer or further apart. When the two needle plates 503 approach each other, the needles 6 on both needle plates 503 simultaneously needle the nonwoven fabric, which balances the forces on the upper and lower surfaces of the nonwoven fabric and prevents the nonwoven fabric from being stretched during the needle punching process, thus preventing uneven fiber distribution and improving the production quality of the nonwoven fabric. Furthermore, the simultaneous needle punching by the upper and lower needles 6 can improve the processing efficiency of the nonwoven fabric and reduce the distribution density of the needles 6 on a single needle plate 503, making it easier to replace and maintain the needles 6. When the two needle plates 503 move to the minimum distance, there is a gap between the two water jet needles 7 on the upper and lower needle plates 503. At this time, both water jet needles 7 are inserted into the fibers of the nonwoven fabric. The water jets from the two water jet needles 7 collide with each other, causing the water jets to scatter in all directions. This allows the water jets to entangle the fibers of the nonwoven fabric from multiple different directions, improving the uniformity of fiber entanglement and thus improving the quality of the produced nonwoven fabric.

[0026] Further improvements include, for example Figure 8As shown, a water-distributing needle 8 is coaxially inserted into the mounting hole 508. The water-distributing needle 8 is interference-fitted with the mounting hole 508, and a sealing ring 601 is fixedly connected to the end of the water-distributing needle 8. The water-distributing needle 8 and the water-jetting needle 7 are coaxially arranged, and their front ends face each other. The front end of the water-distributing needle 8 has a reflective surface 801 for changing the direction of water flow. The water-distributing needle 8 is designed to cooperate with the water-jetting needle 7. When the two needle plates 503 are moved to the minimum distance state, there is a gap between the water-distributing needle 8 and its corresponding water-jetting needle 7. The water flow ejected by the water-jetting needle 7 hits the reflective surface 801 and is reflected in different directions, so that the water flow can entangle the fibers from different directions, improve the uniformity of fiber distribution, and improve the quality of nonwoven fabric production.

[0027] In the aforementioned nonwoven fabric production equipment, the water jet needle 7 can be set opposite to the water jet needle 8 or the water scattering needle 8, or it can be used alone. When set opposite to each other, it can more efficiently achieve the reflection and scattering of water flow. Moreover, the reflection and scattering points of the water flow are located inside the nonwoven fabric fibers, which can achieve the entanglement of the nonwoven fabric from different directions, thereby improving the quality of the nonwoven fabric produced.

[0028] Further improvements include, for example Figure 8 As shown, the reflective surface 801 can be a conical surface, a spherical surface, or a plane. By setting different types of reflective surfaces, the direction of the water flow ejected by the water jet needle 7 can be effectively controlled, thereby enabling the production of different types of nonwoven fabrics.

[0029] Further improvements include, for example Figure 8 As shown, the angle between the plane and the axis of the water spray hole 701 is 10 degrees to 90 degrees. When the angle between the plane and the axis of the water spray hole 701 is 10 degrees to 90 degrees, the water flow can effectively impact the plane, thereby effectively reflecting and scattering the water flow through the plane, thus improving the entanglement effect of the non-woven fabric fibers.

[0030] A process for preparing needle-punched nonwoven fabric includes the following steps: Step 1: Opening, using an opening machine to loosen the clumps of fiber raw materials into small fiber bundles; Step 2: Combing, using a combing machine to comb the fiber bundles into single fibers and spread the fibers into a uniform fiber web; Step 3: Needle punching, high-pressure water sprayed by the needles 6 and water jet needles 7 of the processing equipment causes the fibers to entangle with each other to obtain a nonwoven fabric preform; Step 4: Secondary needle punching, the fibers are further entangled by the needles 6 of the processing equipment to obtain the finished nonwoven fabric; Step 5: Drying, using a dryer to dry the non-woven fabric; Step 6: Testing and packaging. The performance and appearance of the nonwoven fabric are tested, and the nonwoven fabric that passes the test is packaged.

[0031] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A processing device for needle-punched nonwoven fabric, characterized in that, include: A frame (1) having a top seat (101) and a base (102); Two mounting plates (502) are respectively disposed on the opposite sides of the top seat (101) and the base (102). The two mounting plates (502) are arranged facing each other and are driven to move back and forth relative to each other by a reciprocating power component (501). Two needle plates (503) are detachably connected to two mounting plates (502) respectively. The needle plates (503) have multiple mounting holes (508) along their thickness direction, and the mounting holes (508) are evenly distributed on the needle plates (503). A support plate (505) is disposed on the side of the needle plate (503) away from the mounting plate (502). The support plate (505) is provided with a first power member for adjusting its position. The support plate (505) has needle holes (506). The number of needle holes (506) is equal to the number of mounting holes (508) and they correspond one-to-one. The needle holes (506) and the mounting holes (508) are coaxially arranged. The needle (6) is inserted into the mounting hole (508), and the needles (6) on the two needle plates (503) are staggered. The water jet needle (7) is inserted into at least one of the mounting holes (508) on the needle plate (503). The water jet needle (7) has a water spray hole (701) coaxially arranged inside. The water spray hole (701) is connected to a water supply mechanism (3). The water jet needles (7) located on the two needle plates (503) are coaxially arranged, and the front ends of the two water jet needles (7) are facing each other. A water-spraying needle (8) is coaxially inserted into the mounting hole (508). The water-spraying needle (8) is interference-fitted with the mounting hole (508). A sealing ring (601) is fixedly connected to the end of the water-spraying needle (8). The water-spraying needle (8) and the water-jetting needle (7) are coaxially arranged, and the front ends of the water-spraying needle (8) and the water-jetting needle (7) are directly opposite each other. The front end of the water-spraying needle (8) has a reflective surface (801) for changing the direction of water flow.

2. The processing equipment for needle-punched nonwoven fabric according to claim 1, characterized in that, A sealing ring (504) is fixedly connected to the side of the mounting plate (502) near the needle plate (503). The mounting plate (502), the needle plate (503) and the sealing ring (504) enclose a sealed water cavity (509) for containing high-pressure water. The water supply mechanism (3) is connected to the sealed water cavity (509).

3. The processing equipment for needle-punched nonwoven fabric according to claim 2, characterized in that, The water supply mechanism (3) includes a water collection tank (2) fixedly connected to the base (102). A filter screen (201) is provided inside the water collection tank (2). A water pipe (302) is provided between the water collection tank (2) and the mounting plate (502). The water pipe (302) is connected to the sealed water chamber (509). A high-pressure pump (301) is provided on the water pipe (302).

4. The processing equipment for needle-punched nonwoven fabric according to claim 2, characterized in that, Both the needle (6) and the water jet needle (7) are press-fitted with the mounting hole (508). Both the needle (6) and the water jet needle (7) are provided with a sealing ring (601) at their ends. One end of the mounting hole (508) has a stepped hole for accommodating the sealing ring (601).

5. The processing equipment for needle-punched nonwoven fabric according to claim 1, characterized in that, The frame (1) is provided with a water control mechanism (4). The water control mechanism (4) includes two parallel guide posts (404) fixedly connected to the frame (1). The water control mechanism (4) also includes two extrusion rollers (401). Both ends of the extrusion rollers (401) are provided with guide sleeves (403) that slide with the guide posts (404). The guide sleeves (403) are driven by a second power component to slide along the guide posts (404).

6. The processing equipment for needle-punched nonwoven fabric according to claim 1, characterized in that, The reflecting surface (801) is a conical surface, a spherical surface, or a plane.

7. The processing equipment for needle-punched nonwoven fabric according to claim 6, characterized in that, The angle between the plane and the axis of the water spray hole (701) is 10 degrees to 90 degrees.

8. A process for preparing needle-punched nonwoven fabric, comprising the processing equipment described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Opening, using an opening machine to loosen the clumps of fiber raw materials into small fiber bundles; Step 2: Combing, using a combing machine to comb the fiber bundles into single fibers and spread the fibers into a uniform fiber web; Step 3: Needle punching, the high-pressure water sprayed by the needle (6) and water jet needle (7) of the processing equipment causes the fibers to entangle with each other to obtain a nonwoven fabric blank; Step 4: Secondary needle punching, the fibers are further entangled by the needle (6) of the processing equipment to obtain the finished nonwoven fabric; Step 5: Drying, using a dryer to dry the non-woven fabric; Step 6: Testing and packaging. The performance and appearance of the nonwoven fabric are tested, and the nonwoven fabric that passes the test is packaged.

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