阅读说明：本技术 一种利用废玄武岩纤维制备的缝编毡、其制备方法及缝编毡制备装置 (Stitch-bonded felt prepared from waste basalt fibers, preparation method thereof and stitch-bonded felt preparation device ) 是由 王海龙 孙启华 于 2019-12-20 设计创作，主要内容包括：本发明公开了一种利用废玄武岩纤维制备的缝编毡、其制备方法及缝编毡制备装置,利用废玄武岩纤维制备的缝编毡,包括玄武岩纤维层和将玄武岩纤维层缝合为整体的纱线,玄武岩纤维层由废玄武岩纤维和/或玄武岩纤维均匀铺设形成。利用废玄武岩纤维的缝编毡制备装置,包括依次相接的短切机、均匀成网机、气流成网机、缝编机和收卷机。本申请通过对成网机结构等的改进,可将废玄武岩纤维均匀分散、成网,解决了废玄武岩纤维易团聚、难分散、均匀性差等问题,所制备的缝编毡,均匀性好、强度高,可用于风力发电、船舶、汽车、高速列车、体育用品、防护、建筑等；使得废玄武岩纤维也能得到有效的利用,节约了资源、降低了能耗、降低了成本,实现了真正的变废为宝。(The invention discloses a stitch-bonded felt prepared from waste basalt fibers, a preparation method thereof and a stitch-bonded felt preparation device. The device for preparing the stitch-bonded felt by utilizing the waste basalt fibers comprises a chopping machine, an even lapper, an airflow lapper, a stitch-knitting machine and a winding machine which are sequentially connected. According to the method, the structure of the net forming machine is improved, the waste basalt fibers can be uniformly dispersed and formed into the net, the problems that the waste basalt fibers are easy to agglomerate, difficult to disperse, poor in uniformity and the like are solved, and the prepared stitch-bonded felt is good in uniformity and high in strength and can be used for wind power generation, ships, automobiles, high-speed trains, sports goods, protection, buildings and the like; the waste basalt fiber can be effectively utilized, the resource is saved, the energy consumption is reduced, the cost is reduced, and the real waste is changed into valuable.)

1. The stitch-bonded felt made of the waste basalt fibers is characterized in that: the basalt fiber layer is formed by uniformly laying waste basalt fibers and/or basalt fibers; the length of the waste basalt fiber and/or basalt fiber is 3-8 cm, and the diameter of the waste basalt fiber and/or basalt fiber is 5-14 mu m; the yarn is polyester yarn, and the diameter of polyester yarn is 50 ~ 150D.

2. The stitch-bonded felt produced using waste basalt fiber according to claim 1, wherein the stitch-bonded felt is characterized in that: the needling density of the yarn is 500-900 needles/m²。

3. The stitch-bonded felt produced using waste basalt fibers according to claim 1 or 2, wherein: the thickness of the stitch-bonding felt is 2-6 mm, and the gram weight is 300-800 g/m²。

4. A method for manufacturing a stitch-bonded felt by using waste basalt fibers is characterized by comprising the following steps: cutting waste basalt fibers and/or basalt fibers into short pieces, homogenizing the short pieces into a net by a uniform net former, then uniformly distributing the short pieces in an unoriented way by an airflow net former, and then stitch-bonding the short pieces by polyester yarns to obtain the basalt stitch-bonded felt.

5. The utility model provides an utilize useless basalt fiber's stitch-bonded felt preparation facilities which characterized in that: comprises a chopping machine, a uniform web former, an airflow web former, a stitch-knitting machine and a winding machine which are connected in sequence;

the uniform web former comprises a web forming chamber, and a first conveying curtain, a conveying angle nail curtain and a second conveying curtain which are connected in sequence are arranged in the web forming chamber; the conveying angle nail curtain is driven by three conveying rollers to form cyclic conveying, the conveying angle nail curtain is in a triangular ring shape, three sides forming the triangular ring shape are sequentially provided with a first angle nail curtain, a second angle nail curtain and a third angle nail curtain, the first angle nail curtain is in an obliquely upward structure from the starting end to the tail end, the second angle nail curtain is in an obliquely downward structure from the starting end to the tail end, the tail end of the second angle nail curtain is positioned right above the second conveying curtain, and the height difference between the tail end of the second angle nail curtain and the second conveying curtain is not less than 60 cm; a material stripping roller is arranged opposite to the tail end of the second angle nail curtain, four rows of material stripping nails are uniformly distributed on the surface of the material stripping roller along the circumferential direction, and the material on the second angle nail curtain is beaten down on the second conveying curtain through the material stripping nails on the material stripping roller; a first compression roller and a material homogenizing roller are sequentially arranged in the direction from the upstream to the downstream opposite to the first corner nail curtain, four rows of material homogenizing nails are arranged on the surface of the material homogenizing roller along the circumferential direction, and the material homogenizing roller rotates anticlockwise; the chopping machine is connected with the starting end of the first conveying curtain, the tail end of the first conveying curtain is connected with the starting end of the first corner nail curtain, and the tail end of the second conveying curtain is connected with the air-flow web former.

6. The apparatus for preparing a stitch-bonded felt using waste basalt fiber as recited in claim 5, wherein: the angle nail on the first angle nail curtain is obliquely arranged upwards, the included angle between the angle nail and the vertical direction is 20-40 degrees, the angle nail of the second angle nail curtain is obliquely arranged downwards, and the included angle between the angle nail and the vertical direction is 60-85 degrees.

7. The stitch-bonding felt preparation device using waste basalt fiber according to claim 5 or 6, characterized in that: carry the brad nail on the brad nail curtain to have more than two rows that set up along transmission direction, and all set up mutually by mistake between two adjacent rows of brad nails, the interval between two adjacent rows of brad nails is 2 ~ 4cm, and the interval between the same row of brad nails is 2 ~ 3cm, and brad nail length is 3 ~ 4 cm.

8. The stitch-bonding felt preparation device using waste basalt fiber according to claim 5 or 6, characterized in that: two material homogenizing rollers with the same structure are sequentially arranged in the direction from the upstream to the downstream opposite to the first fillet nail curtain; a second pressing roller is arranged right above the second conveying curtain, and the surface of the second pressing roller is provided with reticulate patterns and knurls; the length of the stripping nail on the stripping roller is 6-8 cm; the length of the material homogenizing nail on the material homogenizing roller is 5-6 cm; a blanking channel is arranged between the tail end of the second brad curtain and the second conveying curtain.

9. The stitch-bonding felt preparation device using waste basalt fiber according to claim 5 or 6, characterized in that: the air-laid machine comprises a frame, wherein a third conveying curtain, a feeding roller, a main cylinder, a material homogenizing chamber, an air roller and a fourth conveying curtain which are sequentially connected are arranged on the frame, the air roller comprises a suction cavity and a dust cage arranged on the periphery of the suction cavity, and a sealing press roller is arranged right above the dust cage; one end of the homogenizing chamber is provided with a feeding hole, the other end of the homogenizing chamber is provided with a discharging hole, the feeding hole of the homogenizing chamber is higher than the discharging hole, the feeding hole of the homogenizing chamber is connected with the space between the feeding roller and the main cylinder, and the discharging hole of the homogenizing chamber is connected with the gap between the air roller and the sealing press roller; an air outlet is arranged on one side of the suction cavity of the air roller, which is opposite to the homogenizing chamber, and the suction cavity is connected with a suction fan for supplying air quantity into the homogenizing chamber; the tail end of the second conveying curtain of the uniform web former is connected with the starting end of the third conveying curtain, and the tail end of the fourth conveying curtain is connected with the stitch-knitting machine.

10. The apparatus for preparing a stitch-bonded felt using waste basalt fiber as recited in claim 9, wherein: the length direction of the air outlet is consistent with the axial direction of the air roller; the homogenizing chamber is in a horn shape gradually expanding from top to bottom; the top surface of the material homogenizing chamber is in a concave arch shape; the suction air volume of the suction fan is 10314-17692 m 3/h; the aperture of the meshes on the dust cage is 3 +/-0.1 mm, the distance between two adjacent meshes is 9-11 mm, and the air speed of the air flow in the meshes is 2-3 m/s.

Technical Field

The invention relates to a stitch-bonded felt prepared from waste basalt fibers, a preparation method thereof and a stitch-bonded felt preparation device, and belongs to the field of stitch-bonded felts.

Background

The basalt fiber is a continuous fiber which is formed by melting natural basalt stone at 1450-1500 ℃ and drawing the natural basalt stone at high speed through a platinum-rhodium alloy wire drawing bushing. The basalt fiber is a novel inorganic environment-friendly green high-performance fiber material and is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, ferric oxide, titanium dioxide and the like. The basalt continuous fiber has high strength, and also has various excellent performances of electrical insulation, corrosion resistance, high temperature resistance and the like, and has been widely applied to various aspects of fiber reinforced composite materials, friction materials, shipbuilding materials, heat insulation materials, the automobile industry, high-temperature filter materials, protection, aerospace fields and the like.

The waste basalt fibers are inevitable industrial tailings generated in the production or use process of the basalt fibers, and generally, the yield of the waste basalt fibers accounts for 10-15% of the total yield of the basalt fibers. Because the waste basalt fibers are easy to agglomerate, difficult to disperse and poor in uniformity, a treatment mode of deep burying in the land is adopted for a long time. Because the waste basalt fiber has the characteristic of degradability, even if the waste basalt fiber is treated by a deep burying method, the damage is relatively small, but if the waste basalt fiber can be fully used for social production and is changed into valuable, resources can be saved, energy consumption can be reduced, cost can be reduced, and great social significance can be generated.

Disclosure of Invention

The invention provides a stitch-bonded felt prepared from waste basalt fibers, a preparation method thereof and a stitch-bonded felt preparation device.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a stitch-bonded felt made of waste basalt fibers comprises a basalt fiber layer and yarns for stitching the basalt fiber layer into a whole, wherein the basalt fiber layer is formed by uniformly laying the waste basalt fibers and/or the basalt fibers; the length of the waste basalt fiber and/or basalt fiber is 3-8 cm, and the diameter of the waste basalt fiber and/or basalt fiber is 5-14 mu m; the yarn is polyester yarn, and the diameter of polyester yarn is 50 ~ 150D.

The stitch-bonded felt has good uniformity and high strength.

In order to meet the requirements of cost and strength, the needling density of the yarn is 500-900 needles/m²。

In order to meet the requirements of different occasions, the thickness of the stitch-bonded felt is 2-6 mm, and the gram weight is 300-800 g/m²。

A method for preparing stitch-bonded felt from waste basalt fibers comprises cutting waste basalt fibers and/or basalt fibers into short pieces, homogenizing the short pieces into a net by a uniform net former, uniformly distributing the short pieces in an unoriented manner by an air-laying machine, and stitch-bonding with polyester yarns to obtain the basalt stitch-bonded felt.

The basalt stitch-bonded felt can be widely used as a novel base material: the field of wind power generation, ships, automobiles, high-speed trains, sports goods, protection, buildings and the like.

The stitch-bonded felt can be made of waste basalt fibers, can also be made of basalt fibers, and can also be made of a mixture of waste basalt fibers and basalt fibers. The applicant verifies through practice that even if the waste basalt fibers are completely adopted for preparation, the uniformity and the strength of the prepared stitch-bonded felt can meet the requirements.

In order to further improve the uniformity of the stitch-bonded felt, the waste basalt fibers and/or the basalt fibers are cut into lengths of 3-8 cm.

A device for preparing a stitch-bonded felt by using waste basalt fibers comprises a chopping machine, a uniform lapper, an airflow lapper, a stitch-knitting machine and a winding machine which are sequentially connected;

the uniform web former comprises a web forming chamber, and a first conveying curtain, a conveying angle nail curtain and a second conveying curtain which are connected in sequence are arranged in the web forming chamber; the conveying angle nail curtain is driven by three conveying rollers to form cyclic conveying, the conveying angle nail curtain is in a triangular ring shape, three sides forming the triangular ring shape are sequentially provided with a first angle nail curtain, a second angle nail curtain and a third angle nail curtain, the first angle nail curtain is in an obliquely upward structure from the starting end to the tail end, the second angle nail curtain is in an obliquely downward structure from the starting end to the tail end, the tail end of the second angle nail curtain is positioned right above the second conveying curtain, and the height difference between the tail end of the second angle nail curtain and the second conveying curtain is not less than 60 cm; the material stripping roller is arranged opposite to the tail end of the second angle nail curtain, four rows of material stripping nails are uniformly distributed on the surface of the material stripping roller along the circumferential direction, and when the material stripping roller rotates, the material stripping nails can beat the materials on the second angle nail curtain onto the second conveying curtain; the first compression roller and the homogenizing roller are sequentially arranged in the direction from the upstream to the downstream opposite to the first brad curtain, four rows of homogenizing nails are arranged on the surface of the homogenizing roller along the circumferential direction, the homogenizing roller rotates anticlockwise, and the homogenizing nails play a role in homogenizing the waste basalt fibers and/or basalt fibers on the first brad curtain; the chopping machine is connected with the starting end of the first conveying curtain, the tail end of the first conveying curtain is connected with the starting end of the first corner nail curtain, and the tail end of the second conveying curtain is connected with the air-flow web former.

The height difference between the tail end of the second brad curtain and the second conveying curtain is set, so that the fibers can be uniformly arranged in a non-directional crossing manner in the blanking process, and the uniformity of the fibers can be better ensured; the first brad nail curtain runs obliquely upwards, the homogenizing roller rotates anticlockwise, and the homogenizing nails on the homogenizing roller play a role in homogenizing the waste basalt fibers and/or basalt fibers on the first brad nail curtain; the first press roller is arranged to homogenize the thickness of the material on the first upward-inclined corner nail curtain.

The position of the chopping machine is not strictly limited, and the chopped materials can be packaged firstly and conveyed to a designated place as required when in use, and then the chopped materials are sequentially processed by the uniform net forming machine, the air-flow net forming machine and the stitch-bonding machine to prepare the stitch-bonding felt.

The installation mode of various rollers and the installation of the motor and the like required by operation all refer to the prior art.

The angle nail curtain conveying motor is controlled by adopting frequency conversion, and the speed of the angle nail curtain can be controlled according to actual production requirements.

In order to achieve a better homogenization effect on the waste basalt fibers, the included angle between the upper angle nail of the conveying angle nail curtain and the plane of the conveying angle nail curtain is 45 degrees. The angle nail on the first angle nail curtain is obliquely arranged upwards, the included angle between the angle nail and the vertical direction is 20-40 degrees, the angle nail of the second angle nail curtain is obliquely arranged downwards, and the included angle between the angle nail and the vertical direction is 60-85 degrees. The conveying angle nail curtain is divided into a first angle nail curtain, a second angle nail curtain and a third angle nail curtain, so that the conveying angle nail curtain is convenient to describe, is substantially integral and forms circular transmission, and the arrangement direction and the angle of glue nails on each angle nail curtain can be realized by adjusting the positions of three transmission rollers.

In order to further ensure the uniformity of material distribution, the angle nails on the conveying angle nail curtain are more than two rows arranged along the conveying direction, the adjacent two rows of angle nails are arranged in a staggered mode, the distance between the adjacent two rows of angle nails is 2-4 cm, the distance between the same row of angle nails is 2-3 cm, and the length of each angle nail is 3-4 cm.

In order to further improve the homogenization effect, two material homogenizing rollers with the same structure are sequentially arranged in the direction from the upstream to the downstream opposite to the first corner nail curtain; and a second pressing roller is arranged right above the second conveying curtain, and a reticulate pattern knurl is arranged on the surface of the second pressing roller.

The second compression roller is adjustable in height, and is convenient for production of stitch-bonded felts of different specifications. The second press roller makes the fed fiber in a holding state, improves the uniformity of the formed web, has knurled surface, improves friction force, and is not stained with the fiber, and the second press roller and the second conveying curtain are synchronously driven.

In order to reduce material loss and production pollution, a blanking channel is arranged between the tail end of the second brad curtain and the second conveying curtain. The materials on the second brad curtain fall on the second conveying curtain along the blanking channel.

In order to improve the uniformity of the formed web, the length of a stripping nail on a stripping roller is preferably 6-8 cm; the length of the material homogenizing nail on the material homogenizing roller is 5-6 cm.

In order to further homogenize the fiber, the air-laid machine comprises a frame, a third conveying curtain, a feeding roller, a main cylinder, a homogenizing chamber, an air roller and a fourth conveying curtain which are sequentially connected are arranged on the frame, the air roller comprises a suction cavity and a dust cage arranged on the periphery of the suction cavity, and a sealing press roller is arranged right above the dust cage; one end of the homogenizing chamber is provided with a feeding hole, the other end of the homogenizing chamber is provided with a discharging hole, the feeding hole of the homogenizing chamber is higher than the discharging hole, the feeding hole of the homogenizing chamber is connected with the space between the feeding roller and the main cylinder, and the discharging hole of the homogenizing chamber is connected with the gap between the air roller and the sealing press roller; an air outlet is arranged on one side of the suction cavity of the air roller, which is opposite to the homogenizing chamber, and the suction cavity is communicated with a suction fan to provide air volume for the homogenizing chamber; the tail end of the second conveying curtain of the uniform web former is connected with the starting end of the third conveying curtain, and the tail end of the fourth conveying curtain is connected with the stitch-knitting machine.

The suction fan provides airflow into the homogenizing chamber through the air outlet on the suction cavity, so that enough air is contained in each fiber in the homogenizing chamber in the conveying process, and the fibers are not intertwined; the air flow mainly plays a role in conveying, diffusing and non-directional cross arrangement on the fibers. In the transmission process, the dust cage on the periphery of the suction cavity of the air roller rotates, so that the materials are conveyed.

The feeding of the air-laid machine is a steel roller structure.

In order to improve the uniformity of air quantity, the length direction of the air outlet is consistent with the axial direction of the air roller. The width of the air outlet is adapted to the width of the discharge hole of the material homogenizing chamber, so that the uniformity of material distribution is better ensured.

In order to further improve the uniformity of the fibers, the homogenizing chamber is in a horn shape gradually expanding from top to bottom, namely the homogenizing chamber is in a horn shape gradually expanding from the feed inlet to the discharge outlet; the top surface of the material homogenizing chamber is in a concave arch shape. Thus, the air flow impulse force can be weakened, and the uniform adsorption of the fibers is facilitated.

In order to further ensure the uniformity of the fibers, the suction air volume of the suction fan is preferably 10314-17692 m 3/h.

In order to further improve the uniformity of fiber mixing, the aperture of the meshes on the dust cage is 3 +/-0.1 mm, the distance between two adjacent meshes is 9-11 mm, and the air speed of the air flow in the meshes is 2-3 m/s.

The terms of orientation such as up and down, left and right, top and bottom refer to the relative positions of the devices in normal use, and the direction from upstream to downstream is the material flow direction, and the direction from the beginning to the end of each device.

The prior art is referred to in the art for techniques not mentioned in the present invention.

The stitch-bonded felt made of the waste basalt fibers has good uniformity and high strength, and can be used for wind power generation, ships, automobiles, high-speed trains, sports goods, protection, buildings and the like; the device for manufacturing the stitch-bonded felt can uniformly disperse and form a net by using the device, solves the problems of easy agglomeration, difficult dispersion, poor uniformity and the like of the waste basalt fiber, effectively utilizes the waste basalt fiber, saves resources, reduces energy consumption, reduces cost and realizes real waste recycling.

Drawings

FIG. 1 is a schematic structural view of a stitch-bonded felt manufacturing apparatus using waste basalt fibers according to the present invention;

FIG. 2 is a schematic structural diagram of a uniform web former of the present invention;

FIG. 3 is a schematic structural view of an airlaid machine according to the present invention;

FIG. 4 is an enlarged schematic view of the feed rollers and the main cylinder of the airlaid web former of FIG. 3;

in the figure, 1 is a uniform web former, 11 is a first conveying curtain, 12 is a conveying angle nail curtain, 121 is a first angle nail curtain, 122 is a second angle nail curtain, 123 is a third angle nail curtain, 13 is a second conveying curtain, 14 is a first press roll, 15 is a material homogenizing roll, 16 is a stripping roll, 17 is a blanking channel, 18 is a second press roll, 19 is a web forming chamber, 2 is an air web former, 21 is a third conveying curtain, 22 is a feeding roller, 23 is a main cylinder, 24 is a material homogenizing chamber, 241 is the top surface of the material homogenizing chamber, 25 is an air roll, 251 is a suction chamber, 252 is a dust cage, 26 is a fourth conveying curtain, 27 is a suction fan, 28 is a sealing press roll, 29 is a frame, 3 is a stitch knitting machine, and 4 is a winding machine.

Detailed Description

In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.

As shown in fig. 1, a device for preparing a stitch-bonded felt by using waste basalt fibers comprises a chopping machine, a uniform web former, an air-laid web former, a stitch-knitting machine and a winding machine which are connected in sequence;

as shown in fig. 2, the uniform web former comprises a web forming chamber, wherein a first conveying curtain, a conveying angle nail curtain and a second conveying curtain which are connected in sequence are arranged in the web forming chamber; the conveying angle nail curtain is driven by three conveying rollers to form cyclic conveying, the conveying angle nail curtain is in a triangular ring shape, three sides forming the triangular ring shape are sequentially provided with a first angle nail curtain, a second angle nail curtain and a third angle nail curtain, the first angle nail curtain is in an obliquely upward structure from the starting end to the tail end, the second angle nail curtain is in an obliquely downward structure from the starting end to the tail end, the tail end of the second angle nail curtain is positioned right above the second conveying curtain, the height difference between the tail end of the second angle nail curtain and the second conveying curtain is not less than 60cm, and a blanking channel is arranged between the tail end of the second angle nail curtain and the second conveying curtain; a material stripping roller is arranged opposite to the tail end of the second angle nail curtain, four rows of material stripping nails are uniformly distributed on the surface of the material stripping roller along the circumferential direction, and the material on the second angle nail curtain is beaten down on the second conveying curtain through the material stripping nails on the material stripping roller; the first compression roller and the two material homogenizing rollers are sequentially arranged in the direction from the upstream to the downstream opposite to the first fillet nail curtain, four rows of material homogenizing nails are arranged on the surface of each material homogenizing roller along the circumferential direction, the material homogenizing rollers rotate anticlockwise, and the material homogenizing nails on the material homogenizing rollers play a role in homogenizing the waste basalt fibers and/or basalt fibers on the first fillet nail curtain; a second pressing roller is arranged right above the second conveying curtain, the surface of the second pressing roller is provided with reticulate knurls, the height of the second pressing roller is adjustable, the fed fibers are in a holding state, the uniformity of web formation is improved, the knurl treatment on the surface of the pressing roller is used for improving friction force and preventing the fibers from being stained, and the pressing roller and the second conveying curtain are synchronously driven; the chopping machine is connected with the starting end of the first conveying curtain, the tail end of the first conveying curtain is connected with the starting end of the first corner nail curtain, and the tail end of the second conveying curtain is connected with the air-flow web former;

the included angle between the upper angle nail of the conveying angle nail curtain and the plane where the conveying angle nail curtain is located is 45 degrees; the angle nails on the first angle nail curtain are obliquely arranged upwards, the included angle between the angle nails and the vertical direction is 25 degrees, the angle nails of the second angle nail curtain are obliquely arranged downwards, and the included angle between the angle nails and the vertical direction is 80 degrees; will carry the angle nail curtain to divide into first angle nail curtain, second angle nail curtain and third angle nail curtain, be for the description convenience, the essence is whole, and forms the circulation transmission, carries angle nail curtain motor to adopt frequency conversion control, can be according to the speed that actual production needs the angle nail curtain, and the direction of setting up of angle nail on each angle nail curtain and the position realization of the three transmission roller of angle accessible adjustment.

The angle nails on the conveying angle nail curtain are more than two rows arranged along the conveying direction, the two adjacent rows of angle nails are arranged in a staggered mode, the distance between the two adjacent rows of angle nails is 3cm, the distance between the same row of angle nails is 2.5cm, and the length of each angle nail is 3.5 cm. The angle nail is a steel nail with an upward pointed end. The length of the stripping nail on the stripping roller is 7 cm; the length of the material homogenizing nail on the material homogenizing roller is 6 cm.

As shown in fig. 3-4, the air-laid machine comprises a frame, on which a third conveying curtain, a feeding roller, a main cylinder, a material homogenizing chamber, an air roller and a fourth conveying curtain are arranged in sequence; the frame is a 40mm steel plate welding structure; the air roller comprises a suction cavity and a dust cage arranged on the periphery of the suction cavity, and a sealing press roller is arranged right above the dust cage; one end of the homogenizing chamber is provided with a feeding hole, the other end of the homogenizing chamber is provided with a discharging hole, the feeding hole of the homogenizing chamber is higher than the discharging hole, the feeding hole of the homogenizing chamber is connected with the space between the feeding roller and the main cylinder, the discharging hole of the homogenizing chamber is connected with the gap between the air roller and the sealing press roller, and the homogenizing chamber is in a horn shape gradually expanding from top to bottom; the top surface of the homogenizing chamber is in a concave arch shape, so that the impact force of air flow is weakened, and uniform adsorption of fibers is facilitated; an air outlet is formed in one side, opposite to the homogenizing chamber, of the suction cavity of the air roller, the length direction of the air outlet is consistent with the axial direction of the air roller, and the suction cavity is communicated with a suction fan to provide 10314-17692 m3/h of air volume in the homogenizing chamber; the aperture of each mesh on the dust cage is 3mm, the distance between every two adjacent meshes is 10mm, and the air speed of airflow in the meshes is 2-3 m/s; the tail end of the second conveying curtain of the uniform web former is connected with the starting end of the third conveying curtain, and the tail end of the fourth conveying curtain is connected with the stitch-knitting machine.

The suction fan provides airflow into the homogenizing chamber through the air outlet on the suction cavity, so that enough air is contained in each fiber in the homogenizing chamber in the conveying process, and the fibers are not intertwined; the air flow mainly plays a role in conveying, diffusing and non-directional cross arrangement on the fibers. In the transmission process, the dust cage on the periphery of the suction cavity of the air roller rotates, so that the materials are conveyed.

Description of the drawings: the figure does not show a chopping machine, the position of the chopping machine is not strictly limited, the chopped materials can be packaged firstly and conveyed to a designated place as required when in use, and the chopped materials sequentially pass through a uniform net forming machine, an air-flow net forming machine and a stitch-knitting machine to prepare the stitch-bonded felt.

The stitch-bonded felt is produced by utilizing the stitch-bonded felt preparation device utilizing the waste basalt fibers: cutting waste basalt fibers (the source is industrial tailings generated in the production of the basalt fibers, the diameter is 8-12 mu m) into the length of about 5cm by using a chopping machine; the chopped waste basalt fibers enter an even lapper, are conveyed to a conveying angle nail curtain through a first conveying curtain, are sequentially rolled by a first pressing roller and are homogenized by two homogenizing rollers, then enter a second angle nail curtain, are peeled off by a stripping roller, fall on the second conveying curtain after passing through a blanking channel, are conveyed to a third conveying curtain of the air-jet lapper through the second conveying curtain, are fed through a feeding roller, enter a homogenizing chamber, are distributed on a dust cage of an air roller in a non-directional crossed manner under the action of air flow in the homogenizing chamber, are output to a fourth conveying curtain and are conveyed to a stitch-knitting machine through the fourth conveying curtain, and yarns used by the stitch-knitting machine are polyester yarns with the diameter of 100D; and then winding the waste basalt fibers in a fixed length manner by using a winding machine to obtain the stitch-bonded felt made of the waste basalt fibers, wherein the stitch-bonded felt comprises a basalt fiber layer and yarns for stitching the basalt fiber layer into a whole, and the basalt fiber layer is formed by uniformly laying the waste basalt fibers.

The stitch-bonding felt preparation device utilizing the waste basalt fibers has the following production capacity: 800 tons/year (according to 300 g/m)²) (ii) a The product width is as follows: 2500 mm; the product specification is as follows: 300. 380, 450, 550, 600 or 800g/m²(ii) a Uniformity: the deviation of the average gram weight values of different specifications is less than 1.2 percent, and the yarn is smooth and has no run-off; a winding mode: and (4) a fixed length mode.

TABLE 1 Performance Table of stitch-bonded felt produced using waste basalt fiber

Gram weight g/m2	300	380	450	550	600	800
							Thickness mm	2	3	3.5	4	5	6
Needling density needles/m2	784	784	784	784	784	784
							Air quantity m in material-homogenizing chamber3/h	14051	14569	15463	16003	16536	17692
Tensile strengthMPa	623	652	689	720	742	806
							Conductivity W/m.k	0.04	0.04	0.04	0.04	0.04	0.04

From the above table, it can be seen that the stitch-bonded felt made of the waste basalt fibers has the advantages of light weight, smoothness, no filament drop, high strength and adjustable specification; under the action of flame at 1000 ℃, the material is not deformed, is fireproof for more than 1 hour, is high-temperature resistant, has low shrinkage rate, small heat loss, low heat conductivity coefficient, good heat preservation effect, good acid and alkali resistance, low moisture absorption rate, radiation resistance, ultraviolet resistance and biological pollution resistance, and can be used as a novel base material for: the field of wind power generation, ships, automobiles, high-speed trains, sports goods, protection, buildings and the like.