CN212426255U - Melt-blown spinning nozzle structure with auxiliary blow-spraying function - Google Patents
Melt-blown spinning nozzle structure with auxiliary blow-spraying function Download PDFInfo
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- CN212426255U CN212426255U CN202021809517.2U CN202021809517U CN212426255U CN 212426255 U CN212426255 U CN 212426255U CN 202021809517 U CN202021809517 U CN 202021809517U CN 212426255 U CN212426255 U CN 212426255U
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Abstract
The utility model discloses a melt-blown spinning nozzle structure with assist blows and spouts function relates to melt-blown non-weaving equipment technical field. The melt-blown spinning spray head structure comprises a melt-blown spinning module and an auxiliary melt-blown spraying module; the melt-blown spinning module comprises a matrix, a melt conveying channel is arranged at the central position of the matrix, spinneret orifices are communicated below the melt conveying channel, high-temperature high-speed airflow channels are symmetrically arranged on two sides of the melt conveying channel, the upper parts of the high-temperature high-speed airflow channels are communicated with a high-temperature airflow generating device, and gas orifices are respectively communicated below the high-temperature high-speed airflow channels; the auxiliary blowing module is arranged right below the melt-blown spinning module, the auxiliary blowing module comprises flat nozzles symmetrically arranged on two sides of the central line of a spinneret orifice, the upper parts of the flat nozzles are communicated with the auxiliary airflow generating device, and the air injection directions of air injection ports of the flat nozzles are inclined downwards and inwards. The utility model discloses a melt-blown superfine fiber after the single draft continues to adopt supplementary blowing to spout the module and carries out the secondary draft, can solve the doubling problem that takes place among the melt-blown superfine fiber forming process.
Description
Technical Field
The utility model relates to a melt-blown non-weaving equipment technical field, in particular to melt-blown spinning nozzle structure with assist blows and spouts function.
Background
The melt-blown spinning technology is a technology for preparing polymer particles or chips into melt-blown nonwoven materials by a melt-blown spinning device. The flow of melt-blown textile technology is generally as follows: adding granular slices of polymer from a hopper of a melt-blown spinning device by adopting a melt-blown method, then, under the extrusion and heating action of a high-temperature screw, melting the granular slices into polymer melt, extruding the polymer melt from a spinneret orifice of a melt-blown spinning nozzle under the quantitative output action of a metering pump, blowing and spraying the extruded polymer melt by high-temperature high-speed airflow to be attenuated into melt-blown superfine fibers, receiving, cooling and shaping by a receiving curtain, and forming the melt-blown non-woven material.
In the existing melt-blown technology, the blowing and spraying mode adopted by the high-temperature high-speed airflow is a single-time continuous uniform airflow blowing and spraying mode, two high-temperature high-speed airflows are symmetrically blown and sprayed inwards and downwards at a preset angle, and downward drafting airflows are formed below a spinneret orifice of a melt-blown spinning nozzle, so that polymer melt extruded by the spinneret orifice of the melt-blown spinning nozzle is drawn and attenuated downwards under the action of the drafting airflows to form melt-blown superfine fibers.
In the process of implementing the present invention, the inventor finds that the related art has at least the following problems:
in a blowing and spraying mode adopted by the prior melt-blowing technology, the velocity of a drafting airflow generated after two high-temperature and high-speed airflows are converged is rapidly increased within the range of 1cm and then rapidly reduced, the velocity of the drafting airflow is extremely unstable, the effective drafting distance of a polymer melt is short, and when the polymer melt is subjected to the drafting action of the drafting airflow, melt-blown superfine fibers drawn firstly are easily chased by melt-blown superfine fibers drawn secondly to generate entanglement, so that after a receiving curtain receives, is cooled and shaped, and then the phenomenon of doubling defects is generated on the surface of a melt-blown non-woven material; in addition, because the effective drafting distance of the drafting airflow to the polymer melt is short, the polymer melt cannot be rapidly cooled, crystallized and shaped after passing through a very short drafting zone, so that the diameter of the melt-blown superfine fiber in the cooling process is increased again due to the action of surface tension and melt viscoelasticity, and the product performance of the subsequent melt-blown non-woven material is further influenced.
Disclosure of Invention
To the above-mentioned problem that prior art exists, the utility model provides a melt-blown spinning nozzle structure with assist blows and spouts function.
According to an aspect of the embodiment of the present invention, there is provided a melt-blown spinning nozzle structure with an auxiliary blow-spraying function, which is characterized in that the structure comprises a melt-blown spinning module and an auxiliary blow-spraying module;
the melt-blown spinning module comprises a substrate, wherein a melt conveying channel is arranged at the central position of the substrate, spinneret holes are communicated below the melt conveying channel, two high-temperature high-speed airflow channels are symmetrically arranged on two sides of the melt conveying channel, the upper part of each high-temperature high-speed airflow channel is communicated with a high-temperature airflow generating device, jet holes are respectively communicated below each high-temperature high-speed airflow channel, the two jet holes are symmetrically arranged on two sides of the central line of each spinneret hole, and the jet directions of the two jet holes are downward and inward inclined relative to the horizontal plane at a first preset angle;
the auxiliary blowing module is arranged at a preset distance right below the melt-blown spinning module, the auxiliary blowing module comprises two flat nozzles symmetrically arranged on two sides of the central line of the spinneret orifice, the upper parts of the two flat nozzles are communicated with the auxiliary airflow generating device, and the air injection directions of the air injection ports of the two flat nozzles are inclined downwards and inwards at a second preset angle relative to the horizontal plane.
In a preferred embodiment, the auxiliary blowing module is fixedly connected with the melt-blown spinning module through an adjusting support frame, and the adjusting support frame is used for adjusting and fixing the vertical distance between the auxiliary blowing module and the melt-blown spinning module.
In a preferred embodiment, the adjusting support frame is further used for adjusting and fixing the horizontal distance between two flat nozzles in the auxiliary blowing module.
In a preferred embodiment, the air outlets of the two flat nozzles are horizontally spaced by 5 mm-400 mm.
In a preferred embodiment, the perpendicular distance between the air outlets of the two flat nozzles and the spinneret orifice is 5 mm-1500 mm.
In a preferred embodiment, the temperature of the high-temperature air flow sprayed by the two flat nozzles is 25-350 ℃.
In a preferred embodiment, said second preset angle is greater than 0 ° and less than 90 °.
In a preferred embodiment, the two flat nozzles have an air jet width greater than or equal to the width of the meltblown spinning die set and a length not exceeding 1/10 of the width of the meltblown spinning die set.
In a preferred embodiment, the auxiliary blow mold assembly is positioned above the receiving curtain.
Compared with the prior art, the utility model provides a pair of melt-blown spinning nozzle structure with assist blows and spouts function has following advantage:
the utility model provides a melt-blown spinning spray head structure with auxiliary blow-spraying function, which comprises a melt-blown spinning module and an auxiliary blow-spraying module; the melt-blown spinning module comprises a substrate, a melt conveying channel is arranged at the central position of the substrate, spinneret orifices are communicated below the melt conveying channel, two high-temperature high-speed airflow channels are symmetrically arranged on two sides of the melt conveying channel, the upper part of each high-temperature high-speed airflow channel is communicated with a high-temperature airflow generating device, jet orifices are respectively communicated below each high-temperature high-speed airflow channel, the two jet orifices are symmetrically arranged on two sides of the central line of the spinneret orifice, and the jet directions of the two jet orifices are downward and inwards inclined at a first preset angle relative to the horizontal plane; the auxiliary blowing module is arranged at a preset distance below the melt-blown spinning module, the auxiliary blowing module comprises two flat nozzles symmetrically arranged on two sides of the central line of a spinneret orifice, the upper parts of the two flat nozzles are communicated with the auxiliary airflow generating device, and the air injection directions of the air injection ports of the two flat nozzles are inclined inwards downwards at a second preset angle relative to the horizontal plane. The utility model discloses a melt-blown superfine fiber after the single draft continues to adopt the supplementary module of spouting to carry out the secondary draft for when the draft intensity of melt-blown spinning module draft air current weakens, the supplementary draft air current draft that the module produced is spouted in the supplementary blowing that continues to receive, thereby has avoided the melt-blown superfine fiber of earlier draft to be pursued and the doubling phenomenon that produces by the melt-blown superfine fiber of back draft, and can realize refining melt-blown superfine fiber's further draft.
Furthermore, the auxiliary drafting airflow generated by the auxiliary blowing module can also improve the cooling forming efficiency of the melt-blown superfine fiber, the phenomenon that the diameter of the melt-blown superfine fiber is increased due to the action of surface tension in the cooling forming process can be avoided, and the technical effect of reducing the diameter of the melt-blown superfine fiber is achieved.
The horizontal distance of the auxiliary nozzle and the vertical distance of the spinning die head can be flexibly adjusted according to different processes and different raw materials.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a conventional melt-blown spinning nozzle structure.
FIG. 2 is a schematic diagram of the operation of a prior art meltblown spinneret configuration.
Fig. 3 is a schematic structural diagram illustrating a structure of a meltblown spinneret with an auxiliary blowing function according to an exemplary embodiment of the present invention.
Fig. 4 is an operational view of a structure of a meltblown spinneret with an auxiliary blowing function according to an exemplary embodiment of the present invention.
Fig. 5 is a schematic structural diagram illustrating an adjusting support according to an exemplary embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments (but not limited to the illustrated embodiments) and the accompanying drawings, and the specific method of the embodiments is only for illustrating the present invention, the scope of the present invention is not limited by the embodiments, the present invention can be applied to various modifications and changes of forms and structures, and these equivalent forms based on the present invention are also within the scope of the claims.
In order to better illustrate the structure of the melt-blown spinning nozzle with the auxiliary blow-spraying function provided by the embodiment of the present invention, a schematic structural diagram and a schematic working diagram of the existing melt-blown spinning nozzle structure are shown at first for comparative illustration. As shown in fig. 1, the structure of the conventional meltblown spinneret structure includes a melt delivery channel a, a high-temperature and high-speed airflow channel B, a spinneret orifice C, a pair of air orifices D, a matrix E, and an airflow generator F; as shown in fig. 2, in the operation schematic diagram of the conventional melt-blown spinning nozzle structure, after the high-temperature high-speed airflow is ejected from the air ejection holes D through the high-temperature high-speed airflow channels B on both sides, a drafting airflow is formed below the air ejection holes C, and the airflow strength of the drafting airflow is weakened along with the increase of the ejection distance, so that the drafting strength of the polymer melt in the melt conveying channel a is higher when the polymer melt is ejected from the air ejection holes C, the formed melt-blown ultrafine fibers firstly fall linearly at high speed, and then the falling speed of the first drafting melt-blown ultrafine fibers a is far lower than that of the second drafting ultrafine fibers B under the combined action of weakening of the drafting force and the air resistance due to the weakening of the airflow strength of the drafting airflow, and the first drafting ultrafine fibers a are easily caught by the second drafting ultrafine fibers B to form ultrafine entanglement.
In order to avoid the above situation, the inventor observes and thinks through the actual working process to melt-blown spinning nozzle structure, through a large amount of creative experimental studies, overcomes a series of technical problems, finally proposes the embodiment of the utility model provides an it has the melt-blown spinning nozzle structure of supplementary blow-out function to show.
Fig. 3 is a schematic structural diagram of a structure of a meltblown spinneret with an auxiliary blowing function according to an exemplary embodiment of the present invention.
As shown in fig. 3, the structure of the melt-blown spinning nozzle with the auxiliary blow-spraying function includes a melt-blown spinning module and an auxiliary blow-spraying module; the melt-blown spinning module comprises a substrate (1), wherein a melt conveying channel (2) is arranged at the central position of the substrate (1), spinneret orifices (3) are communicated below the melt conveying channel (2), two high-temperature high-speed airflow channels (4) are symmetrically arranged on two sides of the melt conveying channel (2), the upper part of each high-temperature high-speed airflow channel (4) is communicated with a high-temperature airflow generating device (5), jet holes (6) are respectively communicated below each high-temperature high-speed airflow channel (4), the two jet holes (6) are symmetrically arranged on two sides of the central line of the spinneret orifice (3), and the jet directions of the two jet holes (6) are downward and inward inclined at a first preset angle relative to the horizontal plane; the auxiliary blowing module is arranged at a preset distance right below the melt-blown spinning module, the auxiliary blowing module comprises two flat nozzles (7) symmetrically arranged on two sides of the central line of the spinneret orifice (3), the upper parts of the two flat nozzles (7) are communicated with an auxiliary airflow generating device (8), and the air injection directions of air injection ports (9) of the two flat nozzles (7) are inclined downwards and inwards at a second preset angle relative to the horizontal plane.
To better illustrate the structure of the meltblown spinneret with the auxiliary blowing function provided by the present invention, an operation diagram of the meltblown spinneret with the auxiliary blowing function shown in fig. 4 is shown. In fig. 4, after the high-temperature high-speed airflow is ejected from the air ejection holes (6) through the high-temperature high-speed airflow channels (4) at two sides, a drafting airflow is formed below the spinneret holes (3), the airflow intensity of the drafting airflow is weakened along with the increase of the ejection distance, so that the drafting intensity of the polymer melt in the melt conveying channel (2) is higher when the polymer melt is ejected from the spinneret holes (3), the formed melt-blown superfine fiber firstly falls linearly at high speed, then the falling speed of the previously drafted melt-blown superfine fiber a is reduced under the combined action of weakening drafting force and air resistance due to the weakening of the airflow intensity of the drafting airflow, and the fiber diameter tends to increase due to the surface tension of the melt-blown superfine fiber when the polymer melt is not formed; at the moment, the melt-blown superfine fiber a is firstly drawn to reach the two flat nozzles (7) of the auxiliary blowing module and is subjected to the secondary drawing action of the auxiliary drawing air flow ejected by the air jet ports (9) on the two flat nozzles (7), the falling speed of the melt-blown superfine fiber a is increased under the auxiliary blowing action of the auxiliary drawing air flow, the cooling drawing is further obtained under the blowing action, the thinning and forming efficiency of the melt-blown superfine fiber a is improved, the phenomenon that the melt-blown superfine fiber a is caught up by the melt-blown superfine fiber b after the first drawing is avoided, the melt-blown superfine fiber can fall on the surface of a receiving curtain in a nearly straight falling mode in the whole drawing process to form a melt-blown non-woven material, and the fiber diameter of the melt-blown superfine fiber in the melt-blown non-woven material is far smaller than that of the melt-blown superfine fiber obtained by the existing melt-blown spinning technology under the same process condition, the comprehensive properties of the melt-blown non-woven material can be greatly improved, so that the defective rate of the melt-blown non-woven material product production is greatly reduced.
In a preferred embodiment, the auxiliary blowing module is fixedly connected with the melt-blown spinning module through an adjusting support frame, and the adjusting support frame is used for adjusting and fixing the vertical distance between the auxiliary blowing module and the melt-blown spinning module.
In a preferred embodiment, the adjusting support frame is further used for adjusting and fixing the horizontal distance between two flat nozzles in the auxiliary blowing module.
In one possible embodiment, the adjusting support frame comprises a telescopic adjusting rod (10), a horizontal adjusting nut (11) and an angle adjusting nut (12), wherein the telescopic adjusting rod (10) has a telescopic fixing function and is used for adjusting the height of each flat nozzle (7) in the auxiliary blowing and spraying module; the upper part of the telescopic adjusting rod is horizontally movably connected with the lower part of the melt-blown spinning module matrix (1) through the horizontal adjusting nut (11), and the horizontal adjusting nut (11) is used for adjusting and fixing the horizontal distance between the flat nozzles (7) in the auxiliary blow-blown module; the angle adjusting nut (12) is used for adjusting and fixing the blowing angle of the air outlets (9) on the two flat nozzles (7), and the structural schematic diagram of the adjusting support frame can be shown in fig. 5.
As can be known from the schematic structural diagram of the adjusting support frame shown in fig. 5, the height, the horizontal relative distance and the blowing angle of each flat nozzle (7) in the auxiliary blowing and spraying module can be freely adjusted by a manufacturer through a telescopic adjusting rod (10), a horizontal adjusting nut (11) and an angle adjusting nut (12) included in the adjusting support frame, so that the blowing and spraying modes of the structure of the melt-blown spinning nozzle are enriched, more various blowing and spraying functions are realized, and the melt-blown spinning fiber prepared by the method has more diverse performances.
In a preferred embodiment, the air outlets (9) of the two flat nozzles (7) are 5 mm-400 mm apart.
In a preferred embodiment, the perpendicular distance between the air nozzles (9) of the two flat nozzles (7) and the spinneret orifice (3) is 5mm to 1500 mm.
In a preferred embodiment, the temperature of the high-temperature air flow sprayed by the two flat nozzles (7) is 25-350 ℃.
In a preferred embodiment, said second preset angle is greater than 0 ° and less than 90 °.
In a preferred embodiment, the two flat nozzles have an air jet width greater than or equal to the width of the meltblown spinning die set and a length not exceeding 1/10 of the width of the meltblown spinning die set.
In a preferred embodiment, the auxiliary blow mold assembly is positioned above the receiving curtain.
The utility model provides a melt-blown spinning spray head structure with auxiliary blow-spraying function, which comprises a melt-blown spinning module and an auxiliary blow-spraying module; the melt-blown spinning module comprises a substrate, a melt conveying channel is arranged at the central position of the substrate, spinneret orifices are communicated below the melt conveying channel, two high-temperature high-speed airflow channels are symmetrically arranged on two sides of the melt conveying channel, the upper part of each high-temperature high-speed airflow channel is communicated with a high-temperature airflow generating device, jet orifices are respectively communicated below each high-temperature high-speed airflow channel, the two jet orifices are symmetrically arranged on two sides of the central line of the spinneret orifice, and the jet directions of the two jet orifices are downward and inwards inclined at a first preset angle relative to the horizontal plane; the auxiliary blowing module is arranged at a preset distance below the melt-blown spinning module, the auxiliary blowing module comprises two flat nozzles symmetrically arranged on two sides of the central line of a spinneret orifice, the upper parts of the two flat nozzles are communicated with the auxiliary airflow generating device, and the air injection directions of the air injection ports of the two flat nozzles are inclined inwards downwards at a second preset angle relative to the horizontal plane. The utility model discloses a melt-blown superfine fiber after the single draft continues to adopt the supplementary module of spouting to carry out the secondary draft for when the draft intensity of melt-blown spinning module draft air current weakens, the supplementary draft air current draft that the module produced is spouted in the supplementary blowing that continues to receive, thereby has avoided the melt-blown superfine fiber of earlier draft to be pursued and the doubling phenomenon that produces by the melt-blown superfine fiber of back draft, and can realize refining melt-blown superfine fiber's further draft.
Furthermore, the auxiliary drafting airflow generated by the auxiliary blowing module can also improve the cooling forming efficiency of the melt-blown superfine fiber, the phenomenon that the diameter of the melt-blown superfine fiber is increased due to the action of surface tension in the cooling forming process can be avoided, and the technical effect of reducing the diameter of the melt-blown superfine fiber is achieved.
While the invention has been described in detail in the foregoing by way of general description, and specific embodiments and experiments, it will be apparent to those skilled in the art that the invention can be modified or improved upon. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof.
Claims (9)
1. A melt-blown spinning nozzle structure with an auxiliary blow-spraying function is characterized by comprising a melt-blown spinning module and an auxiliary blow-spraying module;
the melt-blown spinning module comprises a substrate, a melt conveying channel is arranged at the central position of the substrate, spinneret holes are communicated below the melt conveying channel, two high-temperature high-speed airflow channels are symmetrically arranged on two sides of the melt conveying channel, the upper part of each high-temperature high-speed airflow channel is communicated with a high-temperature airflow generating device, jet holes are respectively communicated below each high-temperature high-speed airflow channel, the two jet holes are symmetrically arranged on two sides of the central line of the spinneret hole, and the jet directions of the two jet holes are downward and inward inclined at a first preset angle relative to the horizontal plane;
the auxiliary blowing module is arranged at a preset distance right below the melt-blown spinning module, the auxiliary blowing module comprises two flat nozzles symmetrically arranged on two sides of the central line of the spinneret orifice, the upper parts of the two flat nozzles are communicated with the auxiliary airflow generating device, and the air injection directions of the air injection ports of the two flat nozzles are inclined downwards and inwards at a second preset angle relative to the horizontal plane.
2. A meltblown spinneret structure with auxiliary blowing function according to claim 1, wherein said auxiliary blowing die set is fixedly connected to said meltblown spinning die set by means of an adjusting support frame, and said adjusting support frame is used for adjusting and fixing the vertical distance between said auxiliary blowing die set and said meltblown spinning die set.
3. A meltblown spinneret structure with auxiliary blowing function according to claim 2 wherein said adjustable support frame is further used to adjust and fix the horizontal distance between two flat nozzles in said auxiliary blowing module.
4. A melt-blown spinning nozzle structure with auxiliary blow-blowing function according to claim 1, characterized in that the air outlets of the two flat nozzles are horizontally spaced by 5 mm-400 mm.
5. A melt-blown spinning nozzle structure with auxiliary blow-blowing function according to claim 1, characterized in that the vertical distance between the air outlets of the two flat nozzles and the spinneret orifice is 5 mm-1500 mm.
6. A meltblown spinneret structure with auxiliary blowing function according to claim 1, wherein the temperature of the high temperature air stream emitted from said two flat nozzles is 25-350 ℃.
7. A meltblown spinneret construction with secondary blowing function according to claim 1 wherein said second predetermined angle is greater than 0 ° and less than 90 °.
8. A meltblown spinneret structure with secondary blowing function according to claim 1 wherein the air outlet width of said two flat nozzles is greater than or equal to the width of said meltblown spinneret set and greater than its length by no more than 1/10 of the width of said meltblown spinneret set.
9. A meltblown spinneret construction with secondary blowing function according to claim 1 wherein said secondary blowing die set is located above a receiving curtain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021809517.2U CN212426255U (en) | 2020-08-26 | 2020-08-26 | Melt-blown spinning nozzle structure with auxiliary blow-spraying function |
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| CN202021809517.2U CN212426255U (en) | 2020-08-26 | 2020-08-26 | Melt-blown spinning nozzle structure with auxiliary blow-spraying function |
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| CN212426255U true CN212426255U (en) | 2021-01-29 |
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| CN202021809517.2U Active CN212426255U (en) | 2020-08-26 | 2020-08-26 | Melt-blown spinning nozzle structure with auxiliary blow-spraying function |
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