KR102650276B1 - Flash-Spun Apparatus with Cleaning Means - Google Patents

Abstract

The present invention relates to a flash spinning device and method provided with a cleaning means. Since it is configured to remove residues remaining on the web former belt using the cleaning means, it has the effect of keeping the surface of the conveyor belt clean at all times.

Description

Flash-Spun Apparatus with Cleaning Means}

The present invention relates to a flash spinning device and method provided with a cleaning means, and more specifically, to a cleaning method that improves the quality of non-woven sheets by easily removing residues remaining on the conveyor belt of the web former. It relates to a flash emission device and method comprising a means.

The present invention is a technology related to a flash spinning device. Flash spinning is a modified form of spunbond technology, in which a polymer such as propylene is melted and extruded, and the solvent is evaporated immediately after detention, so that individual fibers are formed into fibrils on the lower conveyor belt ( This is a technology that forms a network structure by being captured on a moving screen. Flash spinning has been used to produce flexifilament film-fibril strands composed of microfibers.

Figure 1 is an example of a conventional flash spinning device. The main components of the conventional nonwoven fabric manufacturing device through flash spinning include a nozzle (1), a rotating reflector (8), a corona discharge device (13), and a web former (not shown). and a rolling part 42.

The moment the mixture of polymer and solvent in a supercritical fluid state is emitted into the atmosphere through the nozzle (1), the solvent vaporizes and the polymer filamentizes, and the filament forms a reticulated web due to collision and fluctuation with the rotating reflector (8). It is formed as (web). After the web is opened in the corona discharge device 13, the web is stacked on the conveyor belt of the web former to be manufactured into a sheet shape, and then wound in the rolling unit 42 and stored and sold in a cylindrical shape.

At this time, some residues and fragments of the web or sheets laminated on the conveyor belt may not be unwound from the rolling unit 42 and may remain on the conveyor belt. In this way, residues that remain without being unrolled from the rolling unit 42 have a negative effect on web stacking and sheet formation and must be removed from the conveyor belt. For this purpose, not only is there the inconvenience of conventionally requiring workers to clean the conveyor belt directly using a brush, but the brush removes residues remaining on the conveyor belt while in contact with the surface of the conveyor belt, which can cause wear and tear on the conveyor belt. There is a downside.

Domestic Patent Publication No. 1999-0067085

The purpose of the present invention to solve the problems of the prior art as described above is to provide a flash radiation device and method having a cleaning means to improve the quality of the sheet by easily removing residues remaining on the conveyor belt. is to provide.

In order to achieve the above object, the present invention includes a nozzle that forms a filament by extruding and spinning a supercritical fluid mixed with a solvent and a high molecular weight polymer; a rotating reflector positioned to face the nozzle, where filaments emitted from the nozzle collide to form a web, and to guide the web in a downward direction; A conveyor belt in which webs whose travel paths have changed by colliding with the rotating reflector are stacked to form a sheet; and a rolling part that unwinds the sheets laminated on the conveyor belt, and further includes a cleaning means located on one side of the conveyor belt to remove residues remaining on the web laminated on the conveyor belt that are not unwound by the rolling part. Provided is a flash emitting device having a cleaning means comprising:

In particular, the cleaning means includes a cleaning part installed to be spaced apart from the rear of the conveyor belt located in the opposite direction of the rolling part, and the cleaning part discharges or suctions air in the direction of the conveyor belt to remove air remaining on the conveyor belt. A flash irradiation device is provided having a cleaning means for removing residues.

In particular, the cleaning means includes a cleaning unit installed to be spaced diagonally upward from the rear upper edge of the conveyor belt located in the opposite direction of the rolling unit, and the cleaning unit discharges or suctions air in the direction of the conveyor belt to Provided is a flash radiation device having a cleaning means for removing residues remaining on a conveyor belt.

In particular, the conveyor belt is formed in a mesh shape, and a negative pressure means is installed inside between the upper and lower sides of the conveyor belt, from one side of the negative pressure means facing the upper side of the conveyor belt to the other side of the negative pressure means. Air is discharged to form a negative pressure atmosphere on the upper surface of the conveyor belt, and the fibers laminated on the upper surface of the conveyor belt by the negative pressure atmosphere formed on the upper surface of the conveyor belt are in close contact with the upper surface of the conveyor belt. A flash emitting device is provided having a cleaning means that moves in the direction of the rolling part.

In addition, the present invention includes a spinning process of forming a filament by extruding and spinning a supercritical fluid mixed with a solvent and a high molecular weight polymer from a nozzle; A web forming process of forming a web of a certain width by causing the filament emitted from the nozzle to collide with a rotating reflector; A web lamination process in which fibers with a changed travel path are laminated on a conveyor belt to form sheet-shaped fibers; A rolling process of unwinding the fibers laminated on the conveyor belt to a rolling unit; and a cleaning means, wherein the cleaning means located on one side of the conveyor belt includes a cleaning process for removing residues remaining on the rolling part among the fibers laminated on the conveyor belt. A flash radiation method is provided.

In particular, in the cleaning process, the cleaning part of the cleaning means, which is installed to be spaced apart from the rear of the conveyor belt located in the opposite direction of the rolling part, discharges or inhales air in the direction of the conveyor belt to remove any residue remaining on the conveyor belt. can be removed.

In particular, the cleaning process includes a cleaning unit installed to be spaced diagonally upward from the rear upper edge of the conveyor belt located in the opposite direction of the rolling unit, and the cleaning unit discharges or inhales air in the direction of the conveyor belt to Residue remaining on the conveyor belt can be removed.

Since the present invention is configured to remove residues remaining on the belt using a cleaning means, it has the effect of keeping the surface of the belt clean at all times.

In addition, since the cleaning means uses air to remove residues remaining on the belt, there is no need to replace brushes periodically as brushes are not used, and problems such as brushes getting caught on the conveyor belt and belt wear caused by brushes are eliminated. There is an effect that does not occur.

1 is a diagram illustrating a conventional flash radiation device.
Figure 2 is a schematic diagram to explain a flash radiation device including a cleaning means according to a preferred embodiment of the present invention.
Figure 3 is a perspective view schematically showing the webformer of the flash spinning device equipped with a cleaning means according to a preferred embodiment of the present invention.
Figure 4 is a cross-sectional view schematically shown to explain an example of a collying means of a flash spinning device equipped with a cleaning means according to a preferred embodiment of the present invention.
Figure 5 is a cross-sectional view schematically shown to explain another example of a collying means of a flash spinning device equipped with a cleaning means according to a preferred embodiment of the present invention.
Figure 6 is a diagram illustrating a flash radiation method including a cleaning means according to a preferred embodiment of the present invention.

Hereinafter, a flash radiation device and method including a cleaning means according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram to explain a flash radiation device including a cleaning means according to a preferred embodiment of the present invention.

Referring to Figure 2, the flash spinning device equipped with a cleaning means according to a preferred embodiment of the present invention includes a nozzle 100, a rotating reflector 200, a corona discharge device 300, a web former, and a rolling unit 600. Includes.

The supercritical fluid of solvent and polymer is extruded and spun through the nozzle 100 to form a filament. That is, when the mixture is spun through the nozzle 100, the solvent is instantaneously evaporated, and the polymer is formed into a filament similar to a thread.

The rotating reflector 200 is positioned to face the nozzle 100, and the filament emitted from the nozzle 100 collides with the rotating reflector 200 and is then formed into a reticulated web. For example, the rotating reflector 200 may be formed as a disk, but the front side facing the nozzle 100 may protrude toward the nozzle 100 toward the center. In addition to this, the rotating reflector 200 may be formed in various ways. Meanwhile, the rotating reflector 200 may be configured to enable not only a rotation function but also tilting or pivoting up, down, left, and right.

The corona discharge device 300 is located between the rotating reflector 200 and the conveyor belt 400 and includes a ground electrode 310 and a needle electrode 320 that are spaced apart to face each other. The fiber moving from the rotating reflector 200 toward the conveyor belt 400 passes between the ground electrode 310 and the needle electrode 320. At this time, the high voltage of the ground electrode 310 and the needle electrode 320 is applied. By applying static electricity to the web, the web is opened due to mutual repulsion.

The web former may include a conveyor belt 400, a cleaning means, and a negative pressure means 500. The conveyor belt 400 collides with the rotating reflector 200 and forms a sheet by stacking a number of webs whose travel paths have changed. The cleaning means of the present invention is for removing residues that remain without being unwound in the rolling unit 600 among the fibers laminated on the conveyor belt 400, and is used in the first cleaning unit 450 or the second cleaning unit 452. Includes. The negative pressure means 500 forms a negative pressure atmosphere on the upper surface of the conveyor belt 400. The conveyor belt 400, the first and second cleaning units 450 and 452, and the negative pressure means 500 will be described later.

The rolling unit 600 unwinds the sheets stacked on the conveyor belt 400 in the form of a roll to form a nonwoven fabric. The nonwoven fabric formed in this way may be able to adjust flexibility, water permeability, breathability, etc. by adding a predetermined process.

Figure 3 is a perspective view schematically showing the webformer of the flash spinning device equipped with a cleaning means according to a preferred embodiment of the present invention.

Referring to Figures 2 and 3, the web former includes a conveyor belt 400 positioned to be spaced downward from the rotating reflector 200, and further includes a negative pressure means 500 positioned inside the conveyor belt 400. can do.

The conveyor belt 400 includes a pair of upper rollers (420, 422) spaced apart from each other, and a pair of lower rollers (424, 426) positioned to be spaced apart from each other at the lower part of the pair of upper rollers (420, 422) and spaced apart from each other. ) and is formed in the form of an endless track, and a pair of upper rollers (420, 422) and a pair of lower rollers (424, 426) are located at the upper and lower sides on both sides of the interior, and the upper rollers (420, 422) and the lower rollers It includes a belt 410 that receives rotational power from (424, 426). The belt 410 is formed in a mesh shape and a plurality of mesh holes 412 are formed along the longitudinal direction. And the belt 410 is rotated by the rotation of the upper rollers 420 and 422 and the lower rollers 424 and 426. And the fibers that collide with the rotating reflector 200 are stacked on the upper surface of the belt 410 to form a sheet. At this time, a material to cancel out the electrical charges on the fiber may be coated on the upper surface of the belt 410. Accordingly, the fibers laminated on the upper surface of the belt 410 are not separated to the outside and are transferred along the belt 410 toward the rolling unit 600 while maintaining the sheet shape. And the thickness of the sheet is adjusted by the rotation speed of the belt 410. Meanwhile, in order to transport the belt 410 in the longitudinal and vertical directions, the upper rollers 420 and 422 and lower rollers 424 and 426 may be configured to move left and right. When the belt 410 is transported in a direction perpendicular to the longitudinal direction, that is, left and right, the width of the sheet formed on the belt 410 is adjusted.

The negative pressure means 500 is installed inside the belt 410 between the upper and lower sides so that a negative pressure atmosphere is formed on the upper surface of the belt 410. In detail, the negative pressure means is located on the upper side of the belt 410. Includes part 510. The negative pressure forming unit 510 has a negative pressure passage 520 formed on the upper side facing the upper side of the belt 410, and discharges air laterally from the upper side of the negative pressure passage 520 to create a negative pressure atmosphere on the upper surface of the belt 410. to form. Then, the fibers laminated on the upper surface of the belt 410 are moved in the direction of the rolling unit 600 while being in close contact with the upper surface of the belt 410 due to the negative pressure atmosphere formed on the upper surface of the belt 410.

In this way, the fibers laminated on the upper surface of the belt 410 are maintained in close contact with the upper surface of the belt 410 by the negative pressure means 500, so the fibers laminated on the belt 410 are in the rolling part 600 in the form of a sheet. While moving in one direction, the shape of the sheet does not arbitrarily lean to one side or move out of place and maintains a uniform shape.

Meanwhile, since the upper rollers (420, 422) and lower rollers (424, 426) are positioned to be spaced apart from each other, the inside of the belt 410 has a space equal to the separation distance between the upper rollers (420, 422) and lower rollers (424, 426). An empty space is formed. Since the upper rollers 420, 422 and the lower rollers 424, 426 are positioned to be spaced apart, an empty space is formed inside the belt 410, and the negative pressure means 500 is applied to the empty space inside the belt 410 formed in this way. It has the effect of being able to be easily positioned.

Figure 4 is a cross-sectional view schematically shown to explain an example of a cleaning means of a flash radiation device equipped with a cleaning means according to a preferred embodiment of the present invention.

Referring to FIG. 4, some of the webs laminated on the belt 410, fiber residues, fragments, etc. may remain on the belt 410 without being unrolled from the rolling unit 600. In this way, the residue remaining without being unrolled from the rolling unit 600 has a negative effect on sheet formation and must be quickly removed from the belt 410. For this purpose, a cleaning means is located on one side of the belt 410. The cleaning means may include, for example, a first cleaning unit 450. The first cleaning unit 450 is installed to be spaced apart from the rear of the belt 410 located in the opposite direction of the rolling unit 600. This first cleaning unit 450 may be installed in a position slightly lower than an imaginary line (not shown) extending from the upper side of the belt 410, and discharges or inhales air in the direction of the belt 410 to clean the belt ( 410) to remove any remaining residue. In this way, since the present invention is configured to remove residue remaining on the belt 410 using the first cleaning unit, it is effective in keeping the surface of the belt 410 clean at all times.

Figure 5 is a cross-sectional view schematically shown to explain another example of a cleaning means of a flash radiation device equipped with a cleaning means according to a preferred embodiment of the present invention.

Referring to Figure 5, the cleaning means may include, for example, a second cleaning unit 452. The second cleaning unit 452 is installed to be spaced apart from the rear of the belt 410 located in the opposite direction to the rolling unit 600.

This second cleaning unit 452 may be installed in a position spaced diagonally upward from the upper edge of the belt 410, and discharges or inhales air in the direction of the belt 410 to remove any residual air remaining on the belt 410. Water can be removed cleanly. Additionally, the second cleaning unit 452 may be rotatable so that the angle of the second cleaning unit 452 can be adjusted.

Hereinafter, a flash radiation method including a cleaning means according to a preferred embodiment of the present invention will be described.

Figure 6 is a diagram illustrating a flash radiation method including a cleaning means according to a preferred embodiment of the present invention.

Referring to FIG. 6, the flash spinning method including a cleaning means according to a preferred embodiment of the present invention includes a spinning process (S10) of forming a filament by extruding and spinning a supercritical fluid mixed with a solvent and a high molecular weight polymer from a nozzle; A web forming process (S20) of forming a web of a certain width by causing the filament emitted from the nozzle to collide with a rotating reflector; Corona discharge process (S30), which obtains an opening effect by applying static electricity to the web through a corona discharge device; A web stacking process (S40) in which a web is stacked on a conveyor belt to form a sheet; A rolling process (S50) of unwinding the sheets stacked on the conveyor belt to the rolling unit; and a cleaning process (S60) in which a cleaning means located on one side of the conveyor belt removes residues that are not unwound from the rolling unit among the fibers laminated on the conveyor belt (S60). do.

The spinning process (S10) and the web forming process (S20) refer to filament formation by nozzle spinning and web formation by rotating reflector collision, respectively, and the corona discharge process (S30) involves applying static electricity to the web through a corona discharge device. This is the process of obtaining the opening effect of the web.

In the lamination process (S40), the negative pressure means 500 installed inside between the upper and lower sides of the conveyor belt 400 causes a negative pressure atmosphere to be formed on the upper surface of the conveyor belt 400, so that the fibers are laminated on the conveyor belt 400. It may include a negative pressure step of bringing the fiber into close contact with the upper surface of the conveyor belt 400 and a movement step of rotating the conveyor belt 400 to move the fibers in close contact with the upper surface of the conveyor belt 400 in the direction of the rolling unit 600. .

The rolling process (S50) is a step in which, when a plurality of webs are stacked to form a sheet, the sheet-shaped nonwoven fabric is rolled and manufactured by a rolling part formed at the rear end of the web former.

The cleaning process (S60) is performed by using the first cleaning unit 450 (shown in FIG. 4) or the second cleaning unit (shown in FIG. 4) of the cleaning means installed to be spaced apart from the rear of the conveyor belt 400, which is located in the opposite direction of the rolling unit 600. 452 (shown in FIG. 5) is configured to remove or inhale air in the direction of the conveyor belt 400 to remove residues remaining on the conveyor belt 400.

Although the present invention has been described in detail in the above embodiments, it is obvious that the present invention is not limited thereto, and it is clear to those skilled in the art that various changes and modifications are possible within the scope of the technical idea of the present invention, and such changes and modifications are attached. If it falls within the scope of the claims, the technical idea should also be considered as belonging to the present invention.

100: nozzle 200: rotating reflector
300: Corona discharge device 310: Ground electrode
320: Needle electrode 400: Conveyor belt
410: belt 412: mesh hole
420, 422: upper roller 424, 426: lower roller
450: first cleaning unit 452: second cleaning unit
500: Negative pressure means 510: Negative pressure forming part
520: negative pressure oil 600: rolling part

Claims (7)

A nozzle that forms a filament by extruding and spinning a supercritical fluid mixed with a solvent and a high molecular weight polymer;
a rotating reflector positioned to face the nozzle, forming a web by colliding with filaments radiating from the nozzle, and guiding the web in a downward direction;
A conveyor belt in which webs whose travel paths have changed by colliding with the rotating reflector are stacked to form a sheet; and
It includes a rolling part that unwinds the sheets stacked on the conveyor belt,
It further includes a cleaning means located on one side of the conveyor belt to remove residues that remain among the webs laminated on the conveyor belt and are not unwound from the rolling unit,
The cleaning means includes a cleaning unit installed to be spaced diagonally upward from the rear upper edge of the conveyor belt, and the cleaning unit discharges or suctions air in the direction of the conveyor belt to remove residue remaining on the conveyor belt,
A flash radiation device including a cleaning means, wherein the cleaning unit is rotatable so that an angle of the cleaning unit can be adjusted.
delete delete In claim 1, the conveyor belt is formed in a mesh shape, a negative pressure means is installed inside between the upper and lower sides of the conveyor belt, and the negative pressure means is installed on one side of the negative pressure means facing the upper side of the conveyor belt. Air is discharged in the other direction to form a negative pressure atmosphere on the upper surface of the conveyor belt, and the fibers laminated on the upper surface of the conveyor belt by the negative pressure atmosphere formed on the upper surface of the conveyor belt are in close contact with the upper surface of the conveyor belt. A flash emitting device having a cleaning means, characterized in that it moves in the direction of the rolling part in a state.
delete delete delete

Images