Processing equipment of needle punched non-woven fabric and preparation process of needle punched non-woven fabric

Abstract

The invention discloses processing equipment for needle-punched non-woven fabrics. The processing equipment comprises a rack, and the rack is provided with a top seat and a bottom seat; the two mounting plates are driven by a reciprocating power piece to do relative reciprocating motion; a plurality of mounting holes are formed in the needle plates in the thickness directions of the needle plates; the supporting plate is provided with a first power piece used for adjusting the position of the supporting plate, and a needle hole is formed in the supporting plate; the pricking needle is inserted and matched with the mounting hole; and the water jetting needle is at least matched with the inserting hole in one mounting plate in an inserting mode, and a water spraying hole is coaxially formed in the water jetting needle and connected with a water supply mechanism. High-pressure water flow ejected by the water jetting needle and the pricking needles simultaneously entangle fibers of the non-woven fabric, the high-pressure water flow collides with the pricking needles to change the direction of the water flow when passing through the non-woven fabric, and therefore the fiber entangling direction can be changed, and the distribution uniformity of the fibers in the non-woven fabric is improved; the stability and the strength of the whole structure of the non-woven fabric are improved. The invention further discloses a preparation process of the needle-punched non-woven fabric.

Description

Technical Field

[0001] The invention belongs to the technical field of non-woven fabric processing, and in particular relates to a processing device for needle-punched non-woven fabric and a preparation process thereof. Background Art

[0002] Needle-punched nonwoven fabrics are made of short fibers, which are entangled by needle-punching. They have high strength and good air permeability, and are used in geotechnical, filtration, automotive and other fields. Needle-punching machines play an indispensable role in the production of needle-punched nonwoven fabrics.

[0003] Existing needling machines can only perform needling along the thickness direction of non-woven fabrics. Needling in a single direction causes the fibers to be entangled mainly in the needling direction, and the fibers perpendicular to the needling direction are relatively less entangled, resulting in uneven fiber distribution inside the non-woven fabric, affecting the stability and strength of the overall structure.

[0004] Therefore, it is necessary to improve the acupuncture machine in the prior art. Summary of the invention

[0005] One of the purposes of the present invention is to overcome the defects in the prior art and provide a processing device for needle-punched nonwoven fabrics, thereby improving the quality of the processed needle-punched nonwoven fabrics.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the needle-punched nonwoven fabric processing equipment of the present invention is as follows: A needle-punched nonwoven fabric processing equipment and a preparation process thereof, comprising: A frame having a top seat and a base; Two mounting plates are respectively arranged on opposite sides of the top seat and the base, the two mounting plates are arranged opposite to each other, and are driven by a reciprocating power member to move reciprocally relative to each other; Two needle plates are detachably connected to the two mounting plates respectively, and the needle plates are provided with a plurality of mounting holes along their thickness direction, and the mounting holes are evenly distributed on the needle plates; A support plate is arranged on a side of the needle plate away from the mounting plate, the support plate is provided with a first power member for adjusting its position, the support plate is provided with pinholes, the number of the pinholes is equal to and corresponds to the mounting holes, and the pinholes are coaxially arranged with the mounting holes; The needles are plugged into the mounting holes, and the needles on the two needle plates are staggered; The water-shooting needle is plugged into and matched with at least one plug hole on the mounting plate, and a water-spraying hole is coaxially arranged inside the water-shooting needle, and the water-spraying hole is connected to a water supply mechanism.

[0007] 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 together form a closed water cavity for accommodating high-pressure water, and the water supply mechanism is connected to the closed water cavity.

[0008] Preferably, the water supply mechanism includes a water collecting tank fixedly connected to the base, a filter is arranged inside the water collecting tank, a water pipe is arranged between the water collecting tank and the mounting plate, the water pipe is connected to the closed water cavity, and a high-pressure pump is arranged on the water pipe.

[0009] Preferably, the pricking needle and the water-shooting needle are both interference fit with the mounting hole, sealing rings are provided at the ends of the pricking needle and the water-shooting needle, and one end of the mounting hole has a stepped hole for accommodating the sealing ring.

[0010] Preferably, a water control mechanism is provided on the frame, and the water control mechanism includes two mutually parallel guide columns fixedly connected to the frame, two extrusion rollers are provided between the two slide rails, and both ends of the extrusion rollers are provided with guide sleeves that slide with the guide columns, and the guide sleeves are driven by the second power member to slide along the guide columns.

[0011] Preferably, the water-shooting needles on the two needle plates are coaxially arranged, and the front ends of the two water-shooting needles are arranged facing each other.

[0012] Preferably, a water-scattering needle is coaxially plugged into the mounting hole, the water-scattering needle is interference-fitted with the plug-in hole, a sealing ring is fixedly connected to the end of the water-scattering needle, the water-scattering needle and the water-shooting needle are coaxially arranged, and the water-scattering needle and the front end of the water-shooting needle are arranged opposite each other, and the front end of the water-scattering needle has a reflecting surface for changing the direction of water flow.

[0013] Preferably, the reflecting surface is a conical surface, a spherical surface or a plane surface.

[0014] Preferably, the angle between the plane and the axis of the water spray hole is 10 degrees to 90 degrees.

[0015] The second object of the present invention is to provide a process for preparing a needle-punched nonwoven fabric, comprising the following steps: Step 1: Opening: the fiber raw materials are loosened into small fiber bundles by an opening machine; Step 2: Combing: combing the fiber bundles into single fiber state through a combing machine, and laying the fibers into a uniform fiber web; Step 3: acupuncture, the fibers are entangled with each other by the high-pressure water sprayed by the needles and water jets of the acupuncture equipment to obtain a rough non-woven fabric; Step 4: Secondary needling, the fibers are further entangled by the needles of the needling machine to obtain the finished non-woven fabric; Step 5: Drying: drying the non-woven fabric in a dryer; Step 6: Testing and packaging: testing the performance and appearance of the non-woven fabric, and packaging the qualified non-woven fabric.

[0016] The processing equipment and preparation process of the needle-punched nonwoven fabric of the present invention have the following advantages: the high-pressure water flow ejected by the water-jet needle and the needle entangle the fibers of the nonwoven fabric at the same time, and the high-pressure water flow collides with the needle when passing through the nonwoven fabric to change the direction of the water flow, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the processing equipment of the needle-punched nonwoven fabric of the present invention; Figure 2 It is a schematic diagram of the installation structure of the water control mechanism of the present invention; Figure 3 It is a schematic diagram of the installation structure of the needle of the present invention; Figure 4 It is a schematic diagram of the connection structure of the mounting plate, the needle plate and the needles of the present invention; Figure 5 for Figure 4 A cross-sectional view of Figure 6 It is a schematic diagram of the structure of the needle of the present invention; Figure 7 It is a schematic diagram of the structure of the water-shooting needle of the present invention; Figure 8 It is a schematic diagram of the distribution structure of the water-shooting needles and the water-scattering needles of the present invention; Explanation of the marks in the figure: 1. frame; 2. water collecting tank; 3. water supply mechanism; 4. water control mechanism; 6. needle; 7. water-shooting needle; 8. water-dispersing 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 column; 501. reciprocating power part; 502. mounting plate; 503. needle plate; 504. sealing ring; 505. support plate; 506. needle hole; 507. second cylinder; 508. mounting hole; 509. closed water chamber; 601. sealing ring; 701. water spray hole; 801. reflecting surface. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] “Top surface”, “bottom surface” and “underside” are referenced to the normal use state of the processing equipment and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0020] like Figure 1-7 As shown, a needle-punched nonwoven fabric processing equipment comprises: The frame 1 has a top seat 101 and a base 102; Two mounting plates 502 are respectively arranged on opposite sides of the top seat 101 and the base 102. The two mounting plates 502 are arranged opposite to each other and are driven by the reciprocating power member 501 to reciprocate relative to each other. Two needle plates 503 are detachably connected to the two mounting plates 502 respectively. The needle plates 503 are provided with a plurality of mounting holes 508 along their thickness direction, and the mounting holes 508 are evenly distributed on the needle plates 503; The support plate 505 is arranged 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 is provided with pinholes 506. The number of the pinholes 506 and the mounting holes 508 are equal and correspond one to one. The pinholes 506 and the mounting holes 508 are coaxially arranged. The needles 6 are plugged into the mounting holes 508, and the needles 6 on the two needle plates 503 are staggered; The water-shooting needle 7 is plugged into and matched with at least one plug hole on the mounting plate 502, and a water-spraying hole 701 is coaxially arranged inside the water-shooting needle 7, and the water-spraying hole 701 is connected to the water supply mechanism 3; The acupuncture device is applicable to but not limited to the production of non-woven fabrics, wherein the reciprocating power member 501 includes a crankshaft, a motor and a connecting rod, and is powered by the motor. Under the transmission action of the crankshaft and the connecting rod, the mounting plate 502 is driven to rise and fall rapidly, thereby driving each needle 6 on the needle plate 503 to rise and fall rapidly. The first power member is a second cylinder 507, which is used to adjust the distance between the two support plates 505. When working, the fiber web passes between the two support plates 505, and the fiber web is needled simultaneously by the needles above and below the fiber web. The fibers are tightly entangled with each other to finally form a non-woven fabric; water-jetting needles 7 are also distributed on the needle plate 503. When the water-jetting needles 7 are raised and lowered, high-pressure water flow can be injected into the interior of the fiber web. When the water flow contacts the fiber web or the adjacent needles, the direction of the water flow will be changed and the water flow will be scattered, so that the water flow is ejected in different directions inside the fiber web. The fibers inside the fiber web are entangled from different directions through the water flow, thereby improving the uniformity of fiber distribution inside the non-woven fabric and improving the stability and strength of the overall structure of the non-woven fabric.

[0021] In the multi-needling process, the above-mentioned processing equipment is preferably used to process the non-woven fabric. Since the non-woven fabric fibers are relatively dispersed in the first one or two needling processes, the water flow can better entangle the fibers in all directions after scattering inside the non-woven fabric fibers, thereby achieving uniform fiber distribution. After that, the non-woven fabric is needled by a pure needle needle machine to make the fibers tightly entangled, so as to improve the strength of the non-woven fabric.

[0022] In the non-woven fabric processing equipment, through the combination of acupuncture and hydroentanglement, acupuncture can improve the efficiency of non-woven fabric production and improve the tightness of entanglement between fibers, and hydroentanglement can improve the uniformity of non-woven fabric fiber distribution, thereby improving the production efficiency and quality of non-woven fabric; and the water flow can also achieve heat dissipation of the needle 6 and the needle plate 503 to maintain the performance of the needle and extend the service life of the needle.

[0023] A further improvement is, Figure 2-5 As shown, a sealing ring 504 is fixedly connected to the side of the mounting plate 502 adjacent to the needle plate 503, and the mounting plate 502, the needle plate 503 and the sealing ring 504 enclose a closed water chamber 509 for accommodating high-pressure water, and the water supply mechanism 3 is connected to the closed water chamber 509; the water supply mechanism 3 includes a water collecting tank 2 fixedly connected to the base 102, a filter screen 201 is arranged inside the water collecting tank 2, a water pipe 302 is arranged between the water collecting tank 2 and the mounting plate 502, the water pipe 302 is connected to the closed water chamber 509, and a high-pressure pump 301 is arranged on the water pipe 302. In the above-mentioned non-woven fabric processing equipment, the water collecting tank 2 is arranged on both sides of the base 102, so that the water generated during the operation of the equipment flows into the water collecting tank 2 for collection. The collected water is filtered through the filter 201, which can reduce impurities in the water flow and keep the water flow clean to prevent the water-shooting needle 7 from being blocked; then the high-pressure pump 301 provides power to send water into the interior of the closed water cavity 509, and then it is ejected through each water-shooting needle 7; the needle plate 503 and the mounting plate 502 are connected by a bolt assembly, which can improve the convenience of disassembly and assembly of the needle plate 503 and facilitate the disassembly and assembly of the needle 6 and the water-shooting needle 7; and the water pressure inside the closed water tank 509 acts on the water-shooting needle 7 and the needle 6, which can apply pressure to the outside of the closed water cavity 509 to prevent the water-shooting needle 7 and the needle 6 from falling off from the inside of the mounting hole 508 during use, thereby improving the stability of the equipment operation; the ejected water flows into the interior of the water collecting tank 2 here, realizing the recycling of the water flow, thereby reducing the production cost of the equipment.

[0024] A further improvement is, Figure 5As shown, both the puncture needle 6 and the water-shooting needle 7 are interference-fitted with the mounting hole 508, and the ends of both the puncture needle 6 and the water-shooting needle 7 are provided with a sealing ring 601, and one end of the mounting hole 508 has a stepped hole for accommodating the sealing ring 601. The provision of the stepped hole can limit the sealing ring 601, improve the firmness of the connection between the sealing ring 601 and the mounting hole 508, and thus improve the firmness of the installation of the water-shooting needle 7 and the puncture needle 6, and can also increase the contact area between the sealing ring 601 and the mounting hole 508, thereby improving the sealing effect.

[0025] A further improvement is, Figure 2 As shown, a water control mechanism 4 is provided on the frame 1, and the water control mechanism 4 includes two mutually parallel guide posts 404 fixedly connected to the frame 1, and two squeezing rollers 401 are provided between the two slide rails. Both ends of the squeezing roller 401 are provided with guide sleeves 403 that slide with the guide posts 404, and the guide sleeves 403 are driven by the second power member to slide along the guide posts 404. The processed non-woven fabric passes between the two squeezing rollers 401, and the squeezing rollers 401 squeeze the non-woven fabric to reduce the water content of the non-woven fabric, which is convenient for subsequent processing of the non-woven fabric; the second power member is the first cylinder 402, and the first cylinder 402 drives the guide sleeve 403 to slide along the guide post 404, so as to adjust the position of the squeezing roller 401 installed on the guide sleeve 403, and then adjust the interval between the two squeezing rollers 401, so as to improve the squeezing effect of the squeezing roller 401 on the non-woven fabric.

[0026] A further improvement is that the water-shooting needles 7 on the two needle plates 503 are coaxially arranged, and the front ends of the two water-shooting needles 7 are arranged facing each other. In the non-woven fabric processing equipment, the upper and lower needle plates 503 move toward or away from each other. When the two needle plates 503 move toward each other, the needles 6 on the two needle plates 503 simultaneously puncture the non-woven fabric, which can balance the forces on the upper and lower surfaces of the non-woven fabric, prevent the non-woven fabric from being stretched during the puncture process, and cause uneven distribution of the non-woven fabric fibers, so as to improve the production quality of the non-woven fabric; and the simultaneous puncture of the upper and lower needles 6 can improve the processing efficiency of the non-woven fabric, and can also reduce the distribution density of the needles 6 on a single needle plate 503, so as to facilitate the replacement and maintenance of the needles 6; when the two needle plates 503 move to a state with the minimum distance, a spacing is maintained between the two water-shooting needles 7 on the upper and lower needle plates 503. At this time, the two water-shooting needles 7 are both inserted into the fibers of the non-woven fabric. At this time, the water jets ejected by the two water-shooting needles 7 collide with each other, which can scatter the water jets in all directions, so that the water jets can entangle the fibers of the non-woven fabric from multiple different directions, improve the uniformity of the entanglement of the non-woven fabric fibers, and thus improve the quality of the produced non-woven fabric.

[0027] A further improvement is, Figure 8As shown, a water-scattering needle 8 is coaxially plugged into the mounting hole 508, and the water-scattering needle 8 is interference-fitted with the plug-in hole. A sealing ring 601 is fixedly connected to the end of the water-scattering needle 8. The water-scattering needle 8 is coaxially arranged with the water-shooting needle 7, and the front ends of the water-scattering needle 8 and the water-shooting needle 7 are arranged opposite to each other. The front end of the water-scattering needle 8 has a reflecting surface 801 for changing the direction of the water flow. The water-scattering needle 8 is arranged to cooperate with the water-shooting needle 7. When the two needle plates 503 move to the state of minimum distance, there is a gap between the water-scattering needle 8 and the corresponding water-shooting needle 7. The water flow ejected by the water-shooting needle 7 hits the reflecting surface 801 and is reflected in different directions, so that the water flow can entangle the fibers from different directions to improve the uniformity of fiber distribution and improve the quality of non-woven fabric production.

[0028] In the above-mentioned non-woven fabric production equipment, the water-shooting needle 7 can be arranged opposite to the water-shooting needle 7 or the water-scattering needle 8, or can be used alone. When they are arranged opposite to each other, the reflection and scattering effects of the water flow can be more efficiently achieved, and the reflection and scattering points of the water flow are located inside the non-woven fabric fibers, which can achieve the entanglement of the non-woven fabric in different directions and improve the quality of the produced non-woven fabric.

[0029] A further improvement is, Figure 8 As shown, the reflective surface 801 is 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-jetting needle 7 can be effectively controlled, thereby realizing the production of different types of non-woven fabrics.

[0030] A further improvement is, 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, thereby enhancing the entanglement effect on the non-woven fibers.

[0031] A preparation process of a needle-punched nonwoven fabric comprises the following steps: Step 1: Opening: the fiber raw materials are loosened into small fiber bundles by an opening machine; Step 2: Combing: combing the fiber bundles into single fiber state through a combing machine, and laying the fibers into a uniform fiber web; Step 3: acupuncture, the fibers are entangled with each other by the high-pressure water sprayed by the needles 6 and the water-jetting needles 7 of the acupuncture equipment to obtain a rough non-woven fabric; Step 4: secondary needling, the fibers are further entangled by the needles 6 of the needling machine to obtain a non-woven fabric product; Step 5: Drying: drying the non-woven fabric in a dryer; Step 6: Testing and packaging: testing the performance and appearance of the non-woven fabric, and packaging the qualified non-woven fabric.

[0032] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A needle-punched nonwoven fabric processing equipment, characterized in that: include: A frame (1), the frame (1) comprising a top seat (101) and a base seat (102); Two mounting plates (502) are respectively arranged on opposite sides of the top seat (101) and the base seat (102); the two mounting plates (502) are arranged opposite to each other and are driven by the reciprocating power member (501) to move reciprocally relative to each other; Two needle plates (503) are detachably connected to the two mounting plates (502), respectively; the needle plates (503) are provided with a plurality of 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 arranged on a 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) is provided with pinholes (506), the number of the pinholes (506) and the mounting holes (508) are equal and correspond one to one, and the pinholes (506) and the mounting holes (508) are coaxially arranged; The needles (6) are plugged into and matched with the mounting holes (508), and the needles (6) located on the two needle plates (503) are staggered; The water-shooting needle (7) is plugged into and matched with at least one plug hole on the mounting plate (502); a water-spraying hole (701) is coaxially arranged inside the water-shooting needle (7); and the water-spraying hole (701) is connected to a water supply mechanism (3).

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

3. The needle-punched nonwoven fabric processing equipment according to claim 2, characterized in that: The water supply mechanism (3) comprises a water collecting tank (2) fixedly connected to the base (102), a filter screen (201) being arranged inside the water collecting tank (2), a water pipe (302) being arranged between the water collecting tank (2) and the mounting plate (502), the water pipe (302) being connected to the closed water cavity (509), and a high-pressure pump (301) being arranged on the water pipe (302).

4. The needle-punched nonwoven fabric processing equipment according to claim 2, characterized in that: The puncture needle (6) and the water-shooting needle (7) are both interference-fitted with the mounting hole (508); sealing rings (601) are provided at the ends of the puncture needle (6) and the water-shooting needle (7); and one end of the mounting hole (508) has a stepped hole for accommodating the sealing ring (601).

5. The needle-punched nonwoven fabric processing equipment according to claim 1, characterized in that: The frame (1) is provided with a water control mechanism (4), the water control mechanism (4) comprising two mutually parallel guide posts (404) fixedly connected to the frame (1), two squeezing rollers (401) being provided between the two slide rails, both ends of the squeezing rollers (401) being provided with guide sleeves (403) slidably matched with the guide posts (404), the guide sleeves (403) being driven by a second power member to slide along the guide posts (404).

6. The needle-punched nonwoven fabric processing equipment according to claim 1, characterized in that: The water-shooting needles (7) located on the two needle plates (503) are coaxially arranged, and the front ends of the two water-shooting needles (7) are arranged facing each other.

7. The needle-punched nonwoven fabric processing equipment according to claim 1, characterized in that: A water-spreading needle (8) is coaxially plugged into the mounting hole (508), the water-spreading needle (8) is interference-fitted with the plugging hole, a sealing ring (601) is fixedly connected to the end of the water-spreading needle (8), the water-spreading needle (8) is coaxially arranged with the water-shooting needle (7), and the front ends of the water-spreading needle (8) and the water-shooting needle (7) are arranged facing each other, and the front end of the water-spreading needle (8) has a reflecting surface (801) for changing the direction of water flow.

8. The needle-punched nonwoven fabric processing equipment according to claim 7, characterized in that: The reflection surface (801) is a conical surface, a spherical surface or a plane surface.

9. The needle-punched nonwoven fabric processing equipment according to claim 8, characterized in that: The angle between the plane and the axis of the water spray hole (701) is 10 degrees to 90 degrees.

10. A process for preparing a needle-punched nonwoven fabric, comprising the processing equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Opening: the fiber raw materials are loosened into small fiber bundles by an opening machine; Step 2: Combing: combing the fiber bundles into single fiber state through a combing machine, and laying the fibers into a uniform fiber web; Step 3: acupuncture, wherein the fibers are entangled with each other by high-pressure water sprayed by the needles (6) and water jet needles (7) of the acupuncture equipment to obtain a rough non-woven fabric; Step 4: secondary needling, wherein the fibers are further entangled by the needles (6) of the needling machine to obtain a nonwoven finished product; Step 5: Drying: drying the non-woven fabric in a dryer; Step 6: Testing and packaging: testing the performance and appearance of the non-woven fabric, and packaging the qualified non-woven fabric.

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