CN113584721B - Improved generation melts and spouts non-woven fabrics forming mechanism - Google Patents

Improved generation melts and spouts non-woven fabrics forming mechanism Download PDF

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Publication number
CN113584721B
CN113584721B CN202110966667.7A CN202110966667A CN113584721B CN 113584721 B CN113584721 B CN 113584721B CN 202110966667 A CN202110966667 A CN 202110966667A CN 113584721 B CN113584721 B CN 113584721B
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Prior art keywords
nozzle
spinning
cavity
arc
air
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CN113584721A (en
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汤国开
吴明辉
林一速
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Fujian Hengan Hygiene Material Co ltd
Hengan Jinjiang Household Products Co ltd
Hengan Fujian Holding Group Co Ltd
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Fujian Hengan Hygiene Material Co ltd
Hengan Jinjiang Household Products Co ltd
Hengan Fujian Holding Group Co Ltd
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Publication of CN113584721A publication Critical patent/CN113584721A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Abstract

The invention relates to the field of masks, in particular to an improved melt-blown non-woven fabric forming mechanism which comprises an extruder, a nozzle arranged at the front end of the extruder and a coagulation net device, a short fiber spinning device is arranged between the nozzle and the condensing net device, an arc-shaped air blowing port is arranged below the short fiber spinning device, the arc-shaped air blowing port points to the coagulation net device, a horizontal shielding air blowing port is arranged above the short fiber spinning device, the nozzle comprises an extrusion cavity, a conical guide cavity, a spinning pipeline and a spinning nozzle, the spinning pipeline is provided with an arc-shaped expansion cavity, an annular body is arranged on the outer side of the circumference of the nozzle, an air blowing cavity is formed between the annular body and the nozzle, one end of the annular body is positioned at the spinneret orifice, the other end of the annular body and the outer side of the nozzle form an air guide orifice, and a conical block is arranged between the annular body and the nozzle to form an annular air blowing orifice with a notch. Which solves the technical problem of bad effect when the short fiber is added with the hot melt fiber in the prior art.

Description

Improved generation melts and spouts non-woven fabrics forming mechanism
The scheme aims at the Chinese patent application number: 202010305772.1, patent names: a melt-blown non-woven fabric forming device, application date are: 2020.04.17 patent.
Technical Field
The invention relates to the field of masks, in particular to an improved melt-blown non-woven fabric forming mechanism.
Background
At present, the melt-blown nonwoven fabric is usually processed by spinning with a melt extrusion mechanism and then forming on a coagulation net mechanism, and polypropylene materials are often used as the original materials. The existing processing equipment for melt-blown non-woven fabrics can refer to Chinese patent numbers: CN200810020638.6 discloses a melt-blown non-woven fabric processing machine, which belongs to the technical field of non-woven machinery and comprises a first machine frame; a melt extrusion mechanism horizontally arranged at the rear end of the first frame for processing plastic particles into hot melt fibers; a short fiber conveying mechanism for guiding short fibers to the front of a spinneret of the melt extrusion mechanism and forcing the short fibers to be converged with hot melt fibers sprayed by the spinneret to form a melt-blown fiber layer, wherein the short fiber conveying mechanism is arranged at the front end of the first frame; and the composite forming mechanism is used for complexing the non-woven fiber cloth with the upper surface and the lower surface of the melt-blown fiber layer to form a melt-blown non-woven fabric finished product, is arranged below the short fiber conveying mechanism and corresponds to the front of the spinneret. The advantages are that: the melt extrusion mechanism, the short fiber conveying mechanism and the composite forming mechanism are reasonable in configuration and simple in structure; the three mechanisms work cooperatively to meet the processing technology requirement of continuous production of melt-blown non-woven fabrics and the production capacity requirement of batch production.
However, the conventional spinneret often has a poor effect in the step of combining with the short fibers during the discharge, and one of the problems is that the short fibers often drive a part of air flow during the input, and the part of air flow causes the turbulence of the discharged hot melt fibers, so that the melt-blown non-woven fabric cannot be in a good combination state after being formed; secondly, the thermal melting fiber can generate dissipation, and the dissipation material not only causes the reduction of the working efficiency, but also has a great problem in the recovery, and easily causes the waste of raw materials. In addition, the addition of short fibers presents certain difficulties when hot melt fibers are ejected, because the ejection of hot melt fibers causes the short fibers to be repelled, resulting in inefficient incorporation into the hot melt fibers, which affects the quality of the meltblown nonwoven.
Disclosure of Invention
Therefore, in view of the above problems, the present invention provides an improved meltblown nonwoven fabric forming mechanism, which solves the technical problem of poor effect when short fibers are added into hot melt fibers in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: an improved melt-blown non-woven fabric forming mechanism comprises an extruder, a nozzle arranged at the front end of the extruder, and a coagulation net device, wherein a short fiber spinning device is arranged between the nozzle and the coagulation net device, an arc-shaped blowing port is arranged below the short fiber spinning device, the arc-shaped blowing port points to the coagulation net device, a horizontal shielding blowing port is arranged above the short fiber spinning device, the nozzle comprises an extrusion cavity connected with the extruder, a conical guide cavity connected with the extrusion cavity, a spinning pipeline connected with the conical guide cavity, and a spinning port connected with the spinning pipeline, an arc-shaped expansion cavity is arranged at a position, close to the spinning port, on the spinning pipeline, an annular body is arranged on the outer side of the circumference of the nozzle, a blowing cavity is formed between the annular body and the nozzle, one end of the annular body is positioned at the spinning port, the other end of the annular body and the outer side of the nozzle form a wind guide port, and the wind guide port is connected with external wind pressure equipment to realize air flow introduction, a conical block is arranged on one side, close to a spinneret orifice, between the annular body and the nozzle to form an annular blowing orifice with a notch, the condensing net device comprises a condensing net roller, a cooling circulation device arranged on the left side of the condensing net roller and a normal-temperature circulation device arranged on the right side of the condensing net roller, a feed inlet is formed between the cooling circulation device and the normal-temperature circulation device above the condensing net roller, a discharge outlet is formed between the cooling circulation device and the normal-temperature circulation device below the condensing net roller, the cooling circulation device comprises a lower cold air box and an upper return box, the lower cold air box is communicated with external air conditioning equipment, one end, close to the condensing net roller, of the lower cold air box is provided with a plurality of cold air outlets, the upper return box is communicated with an external negative pressure device, one end, close to the condensing net roller, of the upper return box is provided with a plurality of cold air inlets, and the normal-temperature circulation device comprises an upper air outlet box and a lower return box, go up out the case and communicate with outside malleation device, return tank and outside negative pressure device intercommunication down, the one end that goes up the case of giving vent to anger and be close to the net roller of congealing is equipped with a plurality of gas outlets, the one end that the return tank is close to the net roller of congealing down is equipped with a plurality of air inlets.
Furthermore, the maximum cross-sectional area of the arc-shaped expansion cavity is 1.2-1.5 times of the cross-sectional area of the spinning pipeline.
Further, the taper angle of the taper block is less than 5 degrees.
Furthermore, the air blowing cavity is in a conical shape and surrounds the outer side of the circumference of the spinning pipeline, and the included angle between the air blowing cavity and the spinning pipeline is less than 20 degrees.
Furthermore, an arc-shaped recess is formed in the position, located at the annular blowing port, of the nozzle, and the depth of the arc-shaped recess is smaller than 2 mm.
Furthermore, a conical material guide hopper is arranged on the feeding hole.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the scheme utilizes the annular air blowing port to form the air curtain with the gap, and the short fiber spinning device is arranged at the gap of the air curtain, so that the short fibers are more effectively fused into the hot melt fibers. The addition is best when the hot melt fibers are in a form closer to the screen coalescing assembly, but the air curtain is more complete in form closer to the nozzle and looser closer to the screen coalescing assembly, which greatly affects the addition of staple fibers. Even if the air curtain is provided with a notch, the notch is closed as the air curtain is closer to the coagulation net device, so that the short fiber spinning device is arranged between the nozzle and the coagulation net device and is close to the coagulation net devices 1/2 to 1/3, which is a better choice. In addition, after the short fibers are sprayed in, the effect of the air curtain gap is not achieved, and the air curtain gap is left to generate adverse effect at this time, so that the air curtain gap is sealed by the arc-shaped air blowing opening, and the forming of the condensed net is facilitated. Due to the influence of the air flow above, the short fibers tend to fall at the moment of spraying, the addition is not very favorable, and the quality of the generated melt-blown non-woven fabric is not too high, so that partial shielding is realized by utilizing a advective air flow, and the short fibers have certain penetrating force after being sprayed, so that the short fibers enter the interior of the hot-melt fibers, and the quality of the melt-blown non-woven fabric is favorably improved. The strength of the advective air flow is a small air flow which is adjusted according to the air curtain so as not to damage the whole structure of the air curtain, and is usually set to 1/3-1/4 according to the air pressure of the air curtain. The melt-blown fabric formed in the way can be added with more short fibers, so that the cost is effectively reduced, the quality of the product basically reaches the level of the conventional melt-blown non-woven fabric, the weight ratio of the short fibers to the polypropylene fibers can reach 1:1.8-3, the ratio is a preferred ratio, and the specific gravity of the polypropylene fibers can also be improved.
2. The arrangement of the nozzle, particularly the arrangement of the arc-shaped expansion cavity, aims to give a certain stirring effect to the material to be sprayed, so that the sprayed hot-melt fiber filaments have stronger diffusivity, and therefore, the aim of more dispersion is fulfilled, and better filament-shaped superposed melt-blown non-woven fabric is formed. However, this is a disadvantage in itself, and it is not easy to control, scatter, etc. due to the increase of the diffusibility, but this defect can be compensated by the effective arrangement of the ring-shaped air blowing opening, and due to the arrangement of the ring-shaped air blowing opening, the gap of the air curtain is arranged, so that the addition of the short fibers is effectively realized. The air curtain notch is formed by the conical blocks, so that the air curtain notch formed theoretically can be in a state of being small at the top and large at the bottom, but due to the factor of weakening wind, the air curtain notch can be scattered and closed at the lower end gradually.
3. The maximum cross-sectional area of the arc-shaped expansion cavity is 1.2-1.5 times of the cross-sectional area of the spinning pipeline, and the arc-shaped expansion cavity is not suitable for being too large, so that raw materials are easily in a burst state due to the fact that the arc-shaped expansion cavity is too large, and smooth production is not suitable for being carried out.
4. As described above, due to the wind weakening factor, the gap of the wind curtain is gradually scattered and closed at the lower end, and at this time, the angle of the taper angle is controlled, and the proper wind pressure is matched, so that a more reasonable gap state can be formed. The wind pressure for forming the air curtain in the scheme can be selected from 0.3-0.45Mpa, the conical angle can be selected from 5-10 degrees, and the specific implementation in the scheme adopts (0.3Mpa, 10 degrees), (0.32Mpa, 9 degrees), (0.35Mpa, 8 degrees), (0.38Mpa, 8 degrees), (0.4Mpa, 6 degrees), (0.42Mpa, 6 degrees), (0.45Mpa, 5 degrees), and the generated effects are basically similar.
5. The arc-shaped recess can effectively realize slight outward turning of the wind pressure, and the arrangement aims to prevent the influence of the inclined wind curtain on hot melt fibers without influencing the formation of the wind curtain.
6. The setting of netting device congeals, its aim at effectively realize congealing effective shaping of net and effectively break away from, form better melt-blown non-woven fabrics. Through the cooling circulation case of cold air box, last backward flow case formation down, its aim at makes the temperature reduction of condensing the net roller to effectively take over hot melt fibre after rotating, can effectively realize melt-blown non-woven fabrics like this and change in breaking away from, also make hot melt fibre condense solidification sooner, thereby effectively improve the quality, also lie in effectively taking away partial heat. Through the normal atmospheric temperature circulating device that goes out gas box, lower return-flow tank formed, its aim at takes away steam, air current to do not influence the effective shaping of condensing the net. The size of the air flow should not be too large to prevent the damage to the condensation net, and the size should be adjusted according to the actual size, air temperature and other conditions. In the scheme, the temperature of the cold air is 10-15 ℃, and the temperature can be other temperatures. In addition, a material guide hopper is arranged at the feed inlet, and the direction of the air curtain can be positioned in the material guide hopper, so that the operation of forming the coagulation net is facilitated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the conical block and the nozzle;
FIG. 3 is a schematic view of the arrangement of the staple fiber spinning device in cooperation with an air curtain;
fig. 4 is an enlarged view at a in fig. 1.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 4, the embodiment provides an improved meltblown nonwoven fabric forming mechanism, which includes an extruder (not shown in the figure), a nozzle 1 disposed at a front end of the extruder, and a coagulation device 2, wherein a staple fiber spinning device 3 is disposed between the nozzle 1 and the coagulation device 2, and the extruder and the staple fiber spinning device are conventional devices and are not described herein again. An arc-shaped air blowing port 31 is arranged below the short fiber spinning device 3, the arc-shaped air blowing port 31 points to the coagulation net device 2, a horizontal shielding air blowing port 32 is arranged above the short fiber spinning device 3, the arc-shaped air blowing port 31 is communicated with external positive pressure equipment, and the horizontal shielding air blowing port is communicated with air blowing equipment. The nozzle 1 comprises an extrusion cavity 11 connected with an extruder, a conical guide cavity 12 connected with the extrusion cavity 11, a spinning pipeline 13 connected with the conical guide cavity 12, and a spinning nozzle 14 connected with the spinning pipeline 13, wherein an arc-shaped expansion cavity 131 is arranged at a position, close to the spinning nozzle, on the spinning pipeline 13, a ring-shaped body 4 is arranged on the outer side of the circumference of the nozzle 1, a blowing cavity 41 is formed between the ring-shaped body 4 and the nozzle 1, one end of the ring-shaped body 4 is located at the spinning nozzle 14, a wind guide opening 42 is formed at the other end of the ring-shaped body 4 and the outer side of the nozzle 1, the wind guide opening 42 is connected with external wind pressure equipment to realize air flow introduction, a conical block 5 is arranged on one side, close to the spinning nozzle 14, between the ring-shaped body 4 and the nozzle 1 to form an annular blowing opening 51 with a gap, and an air curtain 52 can be formed after the annular blowing opening 51 is blown out. An arc-shaped recess 15 is formed in the position, located at the annular air blowing port 51, of the nozzle 1, the depth of the arc-shaped recess 15 is smaller than 2mm, and the arc-shaped recess 15 is set to be 1.5 mm.
The maximum cross-sectional area of the arc-shaped expansion cavity 131 is 1.2-1.5 times of the cross-sectional area of the spinning pipeline 13, and the scheme is 1.3 times. The taper angle of the tapered block 5 is smaller than 10 degrees and larger than 5 degrees, and the taper angle is 8 degrees. The air blowing cavity 41 is in a conical shape and surrounds the outer side of the circumference of the spinning pipeline 13, the included angle between the air blowing cavity 41 and the spinning pipeline 13 is less than 20 degrees, and 15 degrees is selected in the scheme.
The mesh condensing device 2 comprises a mesh condensing roller 21, a cooling circulation device arranged on the left side of the mesh condensing roller 21, and a normal temperature circulation device arranged on the right side of the mesh condensing roller 21, wherein a feed inlet 22 is formed between the cooling circulation device and the normal temperature circulation device above the mesh condensing roller, a discharge outlet 23 is formed between the cooling circulation device and the normal temperature circulation device below the mesh condensing roller 21, the cooling circulation device comprises a lower cold air box 24 and an upper return box 25, the lower cold air box 24 is communicated with external cold air equipment, one end of the lower cold air box 24 close to the mesh condensing roller is provided with a plurality of cold air outlets 241, the upper return box 25 is communicated with an external negative pressure device, one end of the upper return box 25 close to the mesh condensing roller is provided with a plurality of cold air inlets 251, the normal temperature circulation device comprises an upper air outlet box 26 and a lower return box 27, the upper air outlet box 26 is communicated with the external positive pressure device, the lower return box 27 is communicated with the external negative pressure device, a plurality of air outlets 261 are arranged at one end of the upper air outlet box 26 close to the screen condensing roller, and a plurality of air inlets 271 are arranged at one end of the lower return box 27 close to the screen condensing roller. A conical material guide hopper 221 is arranged on the feeding hole 22.
The beneficial effects are as follows:
1. the scheme utilizes the annular air blowing port to form the air curtain with the gap, and the short fiber spinning device is arranged at the gap of the air curtain, so that the short fibers are more effectively fused into the hot melt fibers. The addition is best when the hot melt fibers are in a form closer to the screen coalescing assembly, but the air curtain is more complete in form closer to the nozzle and looser closer to the screen coalescing assembly, which greatly affects the addition of staple fibers. Even if the air curtain is provided with a notch, the notch is closed as the air curtain is closer to the coagulation net device, so that the short fiber spinning device is arranged between the nozzle and the coagulation net device and is close to the coagulation net devices 1/2 to 1/3, which is a better choice. In addition, after the short fibers are sprayed in, the effect of the air curtain gap is not achieved, and the air curtain gap is left to generate adverse effect at this time, so that the air curtain gap is sealed by the arc-shaped air blowing opening, and the forming of the condensed net is facilitated. Due to the influence of the air flow above, the short fibers tend to fall at the moment of spraying, the addition is not very favorable, and the quality of the generated melt-blown non-woven fabric is not too high, so that partial shielding is realized by utilizing a advective air flow, and the short fibers have certain penetrating force after being sprayed, so that the short fibers enter the interior of the hot-melt fibers, and the quality of the melt-blown non-woven fabric is favorably improved. The advection's air flow intensity is a small air flow that is adjusted according to the air curtain in order not to destroy the overall structure of the air curtain, and is usually set to 1/3-1/4 of the air curtain's pressure. The melt-blown fabric formed in the way can be added with more short fibers, so that the cost is effectively reduced, the quality of the product basically reaches the level of the conventional melt-blown non-woven fabric, the weight ratio of the short fibers to the polypropylene fibers can reach 1:1.8-3, the ratio is a preferred ratio, and the specific gravity of the polypropylene fibers can also be improved.
2. The arrangement of the nozzle, particularly the arrangement of the arc-shaped expansion cavity, aims to give a certain stirring effect to the material to be sprayed, so that the sprayed hot-melt fiber filaments have stronger diffusivity, and therefore, the aim of more dispersion is fulfilled, and better filament-shaped superposed melt-blown non-woven fabric is formed. However, this is a disadvantage in itself, and it is not easy to control, scatter, etc. due to the increase of the diffusibility, but this defect can be compensated by the effective arrangement of the ring-shaped air blowing opening, and due to the arrangement of the ring-shaped air blowing opening, the gap of the air curtain is arranged, so that the addition of the short fibers is effectively realized. The air curtain notch is formed by the conical blocks, so that the air curtain notch formed theoretically can be in a state of being small at the top and large at the bottom, but due to the factor of weakening wind, the air curtain notch can be scattered and closed at the lower end gradually.
3. The maximum cross-sectional area of the arc-shaped expansion cavity is 1.2-1.5 times of the cross-sectional area of the spinning pipeline, and the arc-shaped expansion cavity is not suitable for being too large, so that raw materials are easily in a burst state due to the fact that the arc-shaped expansion cavity is too large, and smooth production is not suitable for being carried out.
4. As described above, due to the wind weakening factor, the gap of the wind curtain is gradually scattered and closed at the lower end, and at this time, the angle of the taper angle is controlled, and the proper wind pressure is matched, so that a more reasonable gap state can be formed. The wind pressure for forming the air curtain in the scheme can be selected from 0.3-0.45Mpa, the conical angle can be selected from 5-10 degrees, and the specific implementation in the scheme adopts (0.3Mpa, 10 degrees), (0.32Mpa, 9 degrees), (0.35Mpa, 8 degrees), (0.38Mpa, 8 degrees), (0.4Mpa, 6 degrees), (0.42Mpa, 6 degrees), (0.45Mpa, 5 degrees), and the generated effects are basically similar.
5. The arc-shaped recess can effectively realize slight outward turning of the wind pressure, and the arrangement aims to prevent the influence of the inclined wind curtain on hot melt fibers without influencing the formation of the wind curtain.
6. The setting of netting device congeals, its aim at effectively realize congealing effective shaping of net and effectively break away from, form better melt-blown non-woven fabrics. Through the cooling circulation case of cold air box, last backward flow case formation down, its aim at makes the temperature reduction of condensing the net roller to effectively take over hot melt fibre after rotating, can effectively realize melt-blown non-woven fabrics like this and change in breaking away from, also make hot melt fibre condense solidification sooner, thereby effectively improve the quality, also lie in effectively taking away partial heat. Through the normal atmospheric temperature circulating device that goes out gas box, lower return-flow tank formed, its aim at takes away steam, air current to do not influence the effective shaping of condensing the net. The size of the air flow should not be too large to prevent the damage to the condensation net, and the size should be adjusted according to the actual size, air temperature and other conditions. In the scheme, the temperature of the cold air is 10-15 ℃, and the temperature can be other temperatures. In addition, a material guide hopper is arranged at the feed inlet, and the direction of the air curtain can be positioned in the material guide hopper, so that the operation of forming the coagulation net is facilitated.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides an improved generation melts and spouts non-woven fabrics forming mechanism, includes the extruder, locates the nozzle of extruder front end, congeals net device, its characterized in that: a short fiber spinning device is arranged between the nozzle and the coagulation net device, an arc-shaped blowing port is arranged below the short fiber spinning device and points to the coagulation net device, a horizontal shielding blowing port is arranged above the short fiber spinning device, the nozzle comprises an extrusion cavity connected with an extruder, a conical guide cavity connected with the extrusion cavity, a spinning pipeline connected with the conical guide cavity, and a spinning port connected with the spinning pipeline, an arc-shaped expansion cavity is arranged at a position on the spinning pipeline close to the spinning port, a ring-shaped body is arranged on the outer side of the circumference of the nozzle, a blowing cavity is formed between the ring-shaped body and the nozzle, one end of the ring-shaped body is positioned at the spinning port, the other end of the ring-shaped body and the outer side of the nozzle form a wind guide port, the wind guide port is connected with external wind pressure equipment to realize air flow introduction, and a conical block is arranged between the ring-shaped body and the nozzle and on one side close to the spinning port to form the annular blowing port with a gap, an arc-shaped recess is formed in the position, located at the annular blowing port, of the nozzle.
2. An improved melt-blown non-woven fabric forming mechanism according to claim 1, wherein: the mesh condensing device comprises a mesh condensing roller, a cooling circulation device arranged on the left side of the mesh condensing roller, and a normal-temperature circulation device arranged on the right side of the mesh condensing roller, wherein a feed inlet is formed between the cooling circulation device and the normal-temperature circulation device above the mesh condensing roller, a discharge outlet is formed between the cooling circulation device and the normal-temperature circulation device below the mesh condensing roller, the cooling circulation device comprises a lower cold air box and an upper return box, the lower cold air box is communicated with external air conditioning equipment, one end of the lower cold air box, which is close to the mesh condensing roller, is provided with a plurality of cold air outlets, the upper return box is communicated with an external positive pressure device, the lower return box is communicated with an external negative pressure device, one end of the upper return box, which is close to the mesh condensing roller, is provided with a plurality of air outlets, and one end of the lower return box, which is close to the screen condensing roller, is provided with a plurality of air inlets.
3. An improved melt-blown non-woven fabric forming mechanism according to claim 2, wherein: and a conical material guide hopper is arranged on the feeding hole.
4. An improved melt-blown nonwoven forming mechanism as claimed in claim 1, wherein: the air blowing cavity is in a conical shape and surrounds the outer side of the circumference of the spinning pipeline, and the included angle between the air blowing cavity and the spinning pipeline is less than 20 degrees.
5. An improved melt-blown non-woven fabric forming mechanism according to claim 1, wherein: the depth of the arc-shaped recess is less than 2 mm.
6. An improved melt-blown non-woven fabric forming mechanism according to claim 1, wherein: the maximum cross-sectional area of the arc-shaped expansion cavity is 1.2-1.5 times of the cross-sectional area of the spinning pipeline.
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