CN114672928B

CN114672928B - Air flow-assisted nonwoven fabric needling machine, needled nonwoven fabric and weaving method thereof

Info

Publication number: CN114672928B
Application number: CN202210225022.2A
Authority: CN
Inventors: 纪华; 王云
Original assignee: Robust Medical Wuhan Co ltd
Current assignee: Robust Medical Wuhan Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2023-02-03
Anticipated expiration: 2042-03-09
Also published as: CN114672928A

Abstract

The invention belongs to the technical field of non-woven fabric production, and particularly relates to an air flow assisted non-woven fabric needling machine, a needled non-woven fabric and a weaving method thereof. This non-woven fabrics needle loom includes: the pricking pins are vertically arranged downwards, and each pricking pin is provided with an air blowing opening; the lower end of the air seat is detachably connected with each pricking pin and supplies air to each pricking pin; and the vertical reciprocating driving mechanism is used for driving the air seat to reciprocate up and down. Based on the invention, before the felting needles enter the fiber web, more fibers can be adhered by the airflow blown out from the air blowing openings; the felting needles are arranged in the fiber web, and the air flow blown by the air blowing opening assists fiber entanglement in the fiber web; when the felting needles are out of the fiber web, the residual fibers on the barbed needles are separated by the airflow blown by the air blowing openings, so that the penetrating efficiency of the non-woven fabric fiber web and the smoothness of the surface of the non-woven fabric are improved.

Description

Air flow-assisted nonwoven fabric needling machine, needled nonwoven fabric and weaving method thereof

Technical Field

The invention belongs to the technical field of non-woven fabric production, and particularly relates to an air flow assisted non-woven fabric needling machine, a needled non-woven fabric and a weaving method thereof.

Background

The production process of the needle-punched non-woven fabric generally comprises the processing processes of opening, mixing, carding, lapping, pre-needling, main needling, hot rolling and the like. The needling reinforcement mode is that repeated needling is carried out on the fiber web with a triangular section and hook needling at the edge, and the felting needles drive part of fibers in the fiber web to move vertical to the plane of the fiber web, so that the fibers subjected to the needling action are connected with the fiber web, and the carded fibers form a whole and have certain mechanical properties. In the repeated puncturing process of the needle-punched non-woven fabric, when the puncturing needles with the triangular cross section edge side barbs puncture downwards, the inner layer fibers which can be driven are very limited, and the puncturing efficiency of the multi-layer non-woven fabric is lower.

The pre-needling is to perform preliminary needling on the fiber aggregate which is just laid, the density of needle planting of a needle plate is low, the needling frequency is low, and if a fiber net with high strength and compact fiber winding is obtained, a further main needling step is required. The plane of the last needling is generally specified to be the front side, the front side and the back side of the needled non-woven fabric are different in shape, the front side is generally short in burr and flat in surface, and the back side is provided with more fiber burrs. Meanwhile, needle-punching marks such as pinholes are left on the surface of the needle-punched non-woven fabric, and further treatment is required.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an air flow assisted non-woven fabric needling machine, a needled non-woven fabric and a weaving method thereof. The invention can improve the puncture efficiency of the non-woven fabric fiber net, improve the smoothness of the surface of the non-woven fabric, omit the pre-needling step in the prior art and simplify the production equipment and the process flow.

The technical scheme provided by the invention is as follows:

an air-assisted nonwoven needle loom comprising:

the pricking pins are vertically arranged downwards, and each pricking pin is provided with an air blowing opening;

the lower end of the air seat is detachably connected with each pricking pin and supplies air to each pricking pin;

and the vertical reciprocating driving mechanism is used for driving the air seat to reciprocate up and down.

Based on the technical scheme, before the felting needles enter the fiber web, more fibers can be attached by the airflow blown out of the air blowing openings, so that the felting needles can be brought into the fiber web; the felting needles are arranged in the fiber web, and the air flow blown by the air blowing opening assists fiber entanglement in the fiber web; when the felting needles are out of the fiber web, the residual fibers on the barbed hooks of the felting needles are separated by the airflow blown out of the air blowing openings, and the fibers are prevented from being taken out of the fiber web by the felting needles, so that the penetrating efficiency of the non-woven fabric fiber web is improved, the smoothness of the surface of the non-woven fabric is improved, and the bulkiness of the non-woven fabric is improved.

Specifically, the lancet comprises:

the upper end of the hollow needle blade is communicated with the air seat and is detachably connected with the air seat, and the needle blade is provided with the air blowing ports;

the needle comprises a needle leaf, a plurality of barbs arranged on the needle leaf, and at least one air blowing opening arranged on the lower end face of the root of each barb.

Based on the technical scheme, on one hand, the arrangement of the air blowing openings on the needle blades is realized, and on the other hand, the direction of each air blowing opening ensures that each air blowing mode is realized.

Specifically, the upper end of the needle blade is provided with a round tube-shaped needle handle, the periphery of the needle handle is provided with external threads, and the needle handle is in threaded connection with the air seat.

Based on the technical scheme, the installation or the replacement of the felting needle on the air seat can be conveniently realized, and the installation structure is used as the structure of the air flow channel, so that the structure is compact and reasonable.

Specifically, the method comprises the following steps:

the lower end of the needle leaf is provided with a needle tip;

the side wall of the needle blade is provided with the barb;

the upper part of the needle leaf is connected with the needle handle through the needle waist, and the diameter of the needle waist is gradually increased from bottom to top.

Specifically, the gas holder includes:

the air box is provided with a plurality of air inlet interfaces, a plurality of air outlet interfaces are arranged on the lower end face of the air box, each air inlet interface is communicated with an air inlet pipe, and each air outlet interface is detachably connected with one pricking pin;

and one end of the push rod is fixedly connected with the air box, and the other end of the push rod is fixedly connected with the moving part of the vertical reciprocating driving mechanism.

Based on the technical scheme, the structure of the puncture needle is well matched, and the puncture needle can be ventilated when being fixed.

Furthermore, the air outlet interface is a circular threaded through hole.

Based on the technical scheme, the installation structure and the ventilation structure of the puncture needle can be matched.

Specifically, the gas tank includes:

the lower end surface of the needle plate is provided with the threaded through holes;

the air inlet plate is arranged above the needle plate, the air inlet plate is in a frame shape, and the side wall of the air inlet plate is provided with the air inlet interface;

the upper end of the fixed plate is fixedly connected with one end of the push rod;

and the fixing bolts are used for fixedly connecting the needle plate, the air inlet plate and the fixing plate.

Based on the technical scheme, the air chamber can be conveniently formed in the air box so as to ventilate the air blowing opening of the felting needle.

Further:

the joint of the needle plate and the air inlet plate is hermetically connected through a first sealing rubber ring;

and the joint of the air inlet plate and the fixing plate is hermetically connected through a second sealing rubber ring.

Based on above-mentioned technical scheme, can effectual the leakproofness of mentioning the gas tank.

The vertical reciprocating driving mechanism can adopt the existing common reciprocating driving mechanism.

The invention also provides a weaving method of the needle punched non-woven fabric, which comprises the following steps: short fiber raw materials are subjected to blowing, opening, mixing, carding, web forming and web laying to obtain a fiber web, the fiber web is sent between a web stripping plate and a web supporting plate through a feeding mechanism, repeated needling is carried out by adopting the air flow assisted nonwoven fabric needling machine provided by the invention to obtain a reinforced and compact fiber web, and the fiber web is subjected to post-processing treatment and is slit and rolled to obtain smooth and fluffy needled nonwoven fabric with certain strength and thickness.

Based on the technical scheme, before entering the fiber web, the air seat is connected with the air source, the air flow is sprayed out from the air blowing port to blow the vertical fibers on the surface of the fiber web flat, when the felting needle moves downwards and the barb penetrates through the fiber web, more surface fibers and inner layer fibers are penetrated into the fiber web together to form fiber bundle pins, and because the fibers on the surface of the fiber web are in a lodging state, the needle punching traces left by the needle holes can be covered to a certain degree, so that the surface of the fiber web is smoother than that of the conventional needle punching non-woven fabric. After the felting needles enter the fiber web, the felting needles are driven to entangle more fibers by the aid of airflow, and the needling efficiency is improved. As the needles exit the web, the continuously blowing air stream separates the partially penetrated fiber bundles carried by the barbs and remains in the web. And circulating in this way, a plurality of air flow assisted needling steps are carried out, a considerable number of fiber bundles are penetrated into the fiber web, and due to the friction effect among the fibers, the fiber web is entangled by the fiber bundles and is compressed, so that the fiber web can not restore the original loose state, and the fiber web is reinforced.

Specifically, the method comprises the following steps:

the short fibers are natural fibers such as cotton, wool, hemp, bamboo, silk and the like, and chemical fibers such as viscose fibers, polyester fibers, acetate fibers, polypropylene fibers and the like;

the blowing and opening steps are as follows: removing impurities from the short fibers by using a cotton cleaner, and screening foreign matters, impurities and the like in the fibrils;

the carding step is as follows: carding the short fiber raw material into a single-layer or multi-layer fiber net;

the lapping step is as follows: parallel lapping or cross lapping;

the feeding mechanism is one of a net pressing roller, a net pressing curtain or a groove-shaped roller;

the post-processing is a hot-pressing, drying and cooling process;

the slitting and coiling step comprises: and cutting off the non-uniform part of the edge of the non-woven fabric obtained in the drying, cooling and forming step, cutting according to the width and length requirements, and winding the cut non-woven fabric.

The invention also provides the needle punched non-woven fabric obtained by the weaving method.

The needle-punched non-woven fabric provided by the invention is smooth and fluffy under the condition of good strength and thickness.

Has the beneficial effects that:

1. the conventional needling process is divided into a continuous mode and an intermittent mode, wherein the continuous mode is that a main needling mechanism and a pre-needling mechanism are connected into a production line, and the intermittent mode is that the pre-needling mechanism and the main needling mechanism are separately installed. The air flow auxiliary type needling mechanism adopted by the invention can omit the pre-needling step, and simplify the production equipment and the process flow;

2. before needling, the vertical fibers are blown flat by air flow, so that needling is facilitated, and the surface of the air-jet consolidated non-woven fabric is smoother;

3. if the fiber web is too thick, the felting needles are not easy to penetrate, the needling time is increased, after the fiber web is penetrated, the needling time is reduced to a certain degree through air jet reinforcement, and the fiber carrying-out quantity by the felting needles is reduced by air flow.

Drawings

FIG. 1 is a schematic view of the structure of an air-assisted nonwoven needle loom provided by the present invention.

FIG. 2 is a schematic view of the configuration of the needle portion of the air-assisted nonwoven needle loom provided by the present invention.

FIG. 3 is a schematic perspective view of the air seat portion of the air-assisted nonwoven needle loom of the present invention.

FIG. 4 is a front view of the air shoe portion of the air assisted nonwoven needle loom provided by the present invention.

FIG. 5 is a partial schematic view of the needle section of the air-assisted nonwoven needle loom provided by the present invention.

In fig. 1, 2, 3, 4, and 5, the structures represented by the reference numerals are listed below:

1. eccentric shaft, 2, stroke wheel, 3, connecting rod, 4, push rod, 5, guide sleeve, 7, air seat, 71, first sealing rubber ring, 72, air inlet plate, 73, air inlet interface, 74, second sealing rubber ring, 75, fixing plate, 76, needle plate, 8, needle, 81, needle handle, 82, needle waist, 83, needle leaf, 84, needle point, 85, external thread, 86, air blowing port, 89, barb, 10, stripping plate, 11, fiber net, 12 and supporting plate.

Detailed Description

The principles and features of the present invention are described below, and the examples are provided for illustration only and are not intended to limit the scope of the present invention.

In one embodiment, as shown in fig. 1, 3, 4, and 5, an air-assisted nonwoven needle loom comprises: a plurality of puncture needles 8 which are vertically arranged downwards, wherein each puncture needle 8 is provided with a blowing port 86; the lower end of the air seat 7 is detachably connected with each pricking pin 8 and supplies air to each pricking pin 8; and the vertical reciprocating driving mechanism is used for driving the air seat 7 to reciprocate up and down. Based on the technical scheme, before the felting needles enter the fiber web, more fibers can be attached by the airflow blown out by the air blowing openings 86, so that the felting needles can be brought into the fiber web; the felting needles are arranged in the fiber web, and the air flow blown by the air blowing opening 86 assists fiber entanglement in the fiber web; as the needles exit the web, the air stream from the air blowing ports 86 separates the fibers remaining on the barbs of the needles, preventing the needles from carrying the fibers out of the web.

In one embodiment, as shown in FIGS. 1, 3 and 4, the needles 8 are arranged in an array.

In one embodiment, as shown in FIGS. 2 and 5, the lancet 8 comprises: a hollow needle blade 83 with an opening at the upper end, which is communicated with the air seat 7 at the upper end and is detachably connected with the air seat 7, and each air blowing port 86 is arranged on the needle blade 83; a plurality of barbs 89 arranged on the needle blade 83, and at least one air blowing opening 86 is respectively arranged on the lower end surface of the root of each barb 89. The lower end of the needle blade 83 is provided with a needle tip 84. The sidewall of the needle blade 83 is provided with barbs 89. The upper part of the needle blade 83 is connected with the needle handle 81 through the needle waist 82, and the diameter of the needle waist 82 is gradually increased from bottom to top. Based on the technical scheme, the installation or the replacement of the felting needle on the air seat can be conveniently realized, and the installation structure is used as the structure of the air flow channel, so that the structure is compact and reasonable.

In one embodiment, the upper end of the needle blade 83 has a needle handle 81 having a circular tube shape, the outer circumference of the needle handle 81 is provided with an external thread 85, and the needle handle 81 is screwed with the air seat 7. Based on the technical scheme, a mature threaded connection mode can be adopted, and the needle leaves are fixed and communicated.

In one embodiment, as shown in fig. 3 and 4, the air seat 7 includes: the air box is provided with a plurality of air inlet interfaces 73, the lower end face of the air box is provided with a plurality of air outlet interfaces, each air inlet interface 73 is communicated with an air inlet pipe, and each air outlet interface is detachably connected with one pricking pin 8; and one end of the push rod 4 arranged above the air box is fixedly connected with the air box, and the other end of the push rod is fixedly connected with the moving part of the vertical reciprocating driving mechanism. Based on the technical scheme, the structure of the puncture needle is well matched, and the puncture needle can be ventilated when being fixed.

In one embodiment, the air outlet interface is a circular threaded through hole. Based on the technical scheme, the mounting structure and the ventilation structure of the puncture needle can be matched.

In one embodiment, as shown in fig. 3 and 4, the gas tank includes: a needle plate 76 located below, the lower end surface of which is provided with through-holes for each thread; an air inlet plate 72 above the needle plate 76, wherein the air inlet plate 72 is frame-shaped, and the side wall of the air inlet plate is provided with an air inlet interface 73; a fixing plate 75 positioned above the air inlet plate 72, the upper end of which is fixedly connected with one end of the push rod 4; and a plurality of fixing bolts for fixedly connecting the needle plate 76, the air inlet plate 72 and the fixing plate 75. Based on the technical scheme, an air chamber can be conveniently formed in the air box so as to ventilate the blowing opening 86 of the puncture needle.

In one embodiment, as shown in fig. 3 and 4, the connection between the needle plate 76 and the air intake plate 72 is sealed by a first sealing rubber ring 71. And the joint of the air inlet plate 72 and the fixing plate 75 is hermetically connected through a second sealing rubber ring 74. Based on this technical scheme, can effectual the leakproofness of mentioning the gas tank.

In one embodiment, as shown in fig. 1, the vertical reciprocating drive mechanism includes an eccentric shaft 1, a stroke wheel 2, a connecting rod 3, a push rod 4, and a guide bush 5. The two ends of the connecting rod 3 are respectively and rotatably connected with the eccentric shaft 1 and the push rod 4, and the rotation of the stroke wheel 2 drives the push rod 4, so as to drive the air seat 7 and the pricker 8 thereon to reciprocate up and down.

In one embodiment, as shown in FIG. 5, insufflation port 86 is located at the juncture of the root of barb 89 and needle blade 83.

In one embodiment, the method of weaving a needle-punched nonwoven fabric comprises the steps of: short fiber raw materials are subjected to blowing, opening, mixing, carding, net forming and net laying to obtain a fiber net, then as shown in figure 1, the fiber net 11 is fed between a net stripping plate 10 and a net supporting plate 12 through a feeding mechanism, repeated needle punching is carried out by adopting the air flow assisted non-woven fabric needle punching machine provided by the invention to obtain a reinforced and compact fiber net, and the fiber net is subjected to post-processing treatment and is cut into rolls to obtain smooth and fluffy needle punched non-woven fabric with certain strength and thickness.

Before entering the fiber net, the air seat is connected with an air source, and air flow is sprayed out from the air blowing port to blow the vertical fibers on the surface of the fiber net flat. As the needles move downward and the barbs penetrate the web, more surface fibers and the inner fibers are driven into the web together to form fiber bundle "pins". And because the fibers on the surface of the fiber web are in a lodging state, the fiber web can cover the needle-punched marks left by the needle holes to a certain extent, so that the surface of the fiber web is smoother than that of the conventional needle-punched non-woven fabric. After the felting needles enter the fiber web, the felting needles are driven to entangle more fibers by the aid of airflow, and the needling efficiency is improved. When the felting needles exit the fiber web, the part of the fiber bundles which are carried by the barbs are separated from the barbs by the air flow which is continuously sprayed and remained in the fiber web, and the fiber web which is reinforced and compact is obtained by repeated cyclic needling, and then the fiber web is processed and cut into rolls to obtain the smooth and fluffy needled non-woven fabric.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An air-assisted nonwoven needle loom comprising:

a plurality of felting needles (8) which are vertically arranged downwards, wherein each felting needle (8) is provided with a blowing port (86);

the lower end of the air seat (7) is detachably connected with each pricking pin (8) and supplies air to each pricking pin (8);

the vertical reciprocating driving mechanism is used for driving the air seat (7) to reciprocate up and down;

the lancet (8) comprises:

the upper end of the hollow needle blade (83) is provided with an opening, the hollow needle blade is communicated with the air seat (7) and is detachably connected with the air seat (7), and the needle blade (83) is provided with the air blowing ports (86);

a plurality of barbs (89) arranged on the needle blades (83), and at least one air blowing opening (86) is respectively arranged on the lower end surface of the root of each barb (89).

2. The air-assisted nonwoven needle loom of claim 1, wherein: the upper end of the needle blade (83) is provided with a round tube-shaped needle handle (81), the periphery of the needle handle (81) is provided with an external thread (85), and the needle handle (81) is in threaded connection with the air seat (7) through the external thread (85).

3. The air-assisted nonwoven needle loom of claim 2, characterized in that:

the lower end of the needle blade (83) is provided with a needle point (84);

the side wall of the needle leaf (83) is provided with the barb (89);

the upper part of the needle leaf (83) is connected with the needle handle (81) through a needle waist (82), and the diameter of the needle waist (82) is gradually increased from bottom to top.

4. An air-assisted nonwoven needle loom according to one of the claims 1 to 3, characterized in that the air holder (7) comprises:

the air box is provided with a plurality of air inlet interfaces (73), a plurality of air outlet interfaces are arranged on the lower end face of the air box, each air inlet interface (73) is communicated with an air inlet pipe, and each air outlet interface is detachably connected with one pricking pin (8);

and the push rod (4) is arranged above the air box, one end of the push rod is fixedly connected with the air box, and the other end of the push rod is fixedly connected with the moving part of the vertical reciprocating driving mechanism.

5. The air-assisted nonwoven needle loom of claim 4, characterized in that: the air outlet connector is a circular threaded through hole.

6. The air-assisted nonwoven needle loom of claim 5, characterized in that: the gas tank includes:

a needle plate (76) positioned below, the lower end surface of which is provided with the thread through holes;

the air inlet plate (72) is arranged above the needle plate (76), the air inlet plate (72) is in a frame shape, and the side wall of the air inlet plate is provided with the air inlet interface (73);

the fixing plate (75) is positioned above the air inlet plate (72), and the upper end of the fixing plate is fixedly connected with one end of the push rod (4);

and the fixing bolts are used for fixedly connecting the needle plate (76), the air inlet plate (72) and the fixing plate (75).

7. The air-assisted nonwoven needle loom of claim 6, characterized in that:

the connection part of the needle plate (76) and the air inlet plate (72) is connected in a sealing way through a first sealing rubber ring (71);

the joint of the air inlet plate (72) and the fixing plate (75) is hermetically connected through a second sealing rubber ring (74).

8. A method for weaving a needle-punched non-woven fabric is characterized by comprising the following steps: the short fiber raw material is processed by blowing, opening, mixing, carding, net forming and net laying to obtain a fiber net, then the fiber net is sent between a net stripping plate and a net supporting plate through a feeding mechanism, then the non-woven fabric needle loom assisted by air flow according to any one of claims 1 to 7 is used for repeated needle punching to obtain a reinforced and compact fiber net, and the fiber net is processed and cut into rolls to obtain smooth and fluffy needle punched non-woven fabric.

9. A needle-punched nonwoven fabric obtained by the weaving method according to claim 8.