JP6964890B2 - Nanofiber deposition / molding equipment and its deposition / molding method - Google Patents

Description

The present invention is a nanofiber deposition / molding apparatus for forming a polymer solution of a synthetic resin melt or solution discharged from a discharge nozzle into a predetermined shape while depositing nanofibers elongated into fine-diameter fibers, and the deposition / deposition thereof. Regarding the molding method. In particular, by depositing the polymer solution discharged from the discharge nozzle while being deflected by the deflecting wind from the air nozzles arranged around the polymer solution, the polymer solution is formed into a sheet-shaped, mat-shaped, or block-shaped predetermined shape forming body. The present invention relates to a nanofiber deposition / molding apparatus capable of the above and a method for depositing / molding the nanofiber.

Conventionally, nanofibers have been used in various fields by taking advantage of the characteristics that they are fine-diameter fibers. Then, for example, Patent Document 1 discloses a technique for producing fine-diameter fibers and collecting them. Patent Document 1 describes a nanofiber generator including an air nozzle that generates high-speed high-temperature air and a ejection nozzle that discharges a polymer solution toward the high-speed high-temperature air generated by the air nozzle or toward the vicinity of the high-speed high-temperature air. And a suction device provided on the downstream side of the nanofiber generator to collect nanofibers generated by the nanofiber generator and a suction device provided on the downstream side of the collection device to suck gas. A tubular guide member provided on the downstream side of the nanofiber generator and on the upstream side of the collection device so that the high-speed high-temperature air passes through the inside. Nanofiber manufacturing equipment is described.

By the way, conventionally, when nanofibers are discharged from a single discharge nozzle to the collection device side to collect sheet-shaped nanofibers, the nanofibers are deposited in a circular shape around an extension line of the discharge nozzle. The Rukoto. Therefore, on the collection device side, there is a method (Patent Document 1) in which air is sucked from behind the spraying surface in order to effectively deposit nanofibers. However, in this method, the suction force to the outer peripheral portion of the spray surface decreases with the amount of nanofibers deposited. In addition, since nanofibers are likely to be deposited near the center, it is difficult to form a uniform predetermined shape-forming body.

In addition, nanofibers may be sprayed over a wide area, such as in a roller-type sheet processing device. In this case, a method of installing a plurality of nanofiber discharge nozzles in a wide range or a method of moving the discharge nozzles including the melting part and the driving part can be considered, but the device becomes large and expensive. There was a problem. Further, the discharge nozzle is generally a mechanism for moving in only one axial direction, and the mechanism for moving in a plurality of directions has a very complicated structure.

International Publication No. 2015/145880

In the nanofiber manufacturing apparatus of Patent Document 1, the filter base material on which nanofibers are deposited is heat-treated by a thermocompression bonding roller, laminated, integrated, and wound on a take-up roll as a nanofiber filter material. Have been described. As described above, there is a description that the nanofiber material deposited on the filter base material of the collecting device is wound and collected by the winding roll of the collecting device. There is no description about the technique for molding into a desired shape. Therefore, in order to distribute nanofibers as a product in large quantities, a technique capable of forming nanofibers formed into a predetermined shape-forming body into a desired free shape is desired.

The present invention has been made in view of the above problems, and is a nanofiber deposition / molding apparatus capable of forming a predetermined shape such as a square while collecting the discharged nanofibers while depositing them, and a device thereof. It is an object of the present invention to provide a deposition / molding method.

The nanofiber deposition / molding apparatus of the present invention
Nanofibers are discharged from the discharge nozzle of a nanofiber discharge device that discharges molten or dissolved resin to a hot air flow and stretches it into fine-diameter fibers to produce nanofibers, and the discharged nanofibers are captured by the nanofibers. A nanofiber deposition / molding device that collects and deposits on a collecting means.
The discharge flow direction deflecting means for deflecting the direction of the nanofiber discharge flow from the discharge nozzle to the nanofiber collecting means is provided, and the discharge flow direction deflecting means is the nanofiber collecting means from the discharge nozzle. An air nozzle that deflects the direction of the nanofiber discharge flow by applying a deflecting wind from the side surface direction of the nanofiber discharge flow in the flow path to the nanofiber is provided, and a plurality of the air nozzles are provided. The air nozzles of the above are arranged concentrically with respect to the discharge nozzles at equal intervals.

Further, the nanofiber deposition / molding apparatus of the present invention is
It is characterized by being provided with an air nozzle blowing angle changing means for adjusting the blowing direction angle from the air nozzle.

Further, the nanofiber deposition / molding apparatus of the present invention is
It is characterized by providing a means for changing the amount of air blown to adjust the amount of air blown by the air nozzle.

Further, the nanofiber deposition / molding apparatus of the present invention is
It is characterized by comprising a blower control means for controlling the blower operation of the air nozzles arranged concentrically at equal intervals in a continuous clockwise or counterclockwise direction.

The nanofiber deposition / molding method of the present invention
Nanofibers are discharged from the discharge nozzle of the nanofiber discharge device in order to discharge molten or dissolved resin to the hot air flow and stretch it into fine-diameter fibers to produce nanofibers, and the discharged nanofibers are discharged. It is a method of depositing and molding nanofibers using a nanofiber deposition molding device that collects and deposits with a nanofiber collecting means.
The nanofibers are blown from the side surface direction of the discharge flow by an air nozzle arranged concentrically with respect to the discharge flow of the nanofibers in the flow path from the discharge nozzle to the nanofiber collecting means. To deflect the direction of the discharge flow of
It is characterized in that the blowing operation of the air nozzles arranged concentrically at equal intervals is continuously and sequentially controlled clockwise or counterclockwise.

According to the present invention, the direction of the discharge flow of the nanofibers collected and deposited by the nanofiber collecting means can be adjusted and deflected by the discharge flow direction deflecting means, and therefore, when collected. The nanofibers deposited and molded in the above can be freely formed into a desired predetermined shape such as a square. Moreover, the nanofibers can be uniformly deposited on the spray surface of the nanofiber collecting means regardless of the amount of deposition.

Further, the deposition position of the nanofibers deposited on the nanofiber collecting means can be freely controlled by adjusting the ON / OFF of the air blowing of the air nozzle, the blowing angle, and the blowing amount. It is possible to produce a sheet made of nanofibers having a high degree of freedom, which is not limited to the method of the collector.

Further, the air blowing operation of the air nozzles arranged concentrically at equal intervals with respect to the discharge nozzle is controlled (on / on) by continuously or randomly, for example, clockwise or counterclockwise. By performing off control or air volume control), it is not necessary to provide a large number of air nozzles, and the device structure can be simplified.

It is a schematic side view which shows the nanofiber deposition | molding apparatus as one Example of this invention. It is a perspective view which shows the nanofiber collecting means of the nanofiber deposition | molding apparatus as one Example of this invention. FIG. 5 is a perspective view showing a discharge nozzle configured in a nanofiber discharge device as an embodiment of the present invention, and a discharge flow direction deflecting means for deflecting a discharge flow from the discharge nozzle to the nanofiber collecting means. It is a side view which shows the arrangement relation of the discharge nozzle configured in the nanofiber discharge device as one Example of this invention, and the discharge flow direction deflecting means which deflects the discharge flow from the discharge nozzle to the nanofiber collection means. .. It is a front view which shows the arrangement relationship of the discharge nozzle configured in the nanofiber discharge device as one Example of this invention, and the discharge flow direction deflecting means which deflects the discharge flow from the discharge nozzle to the nanofiber collection means. ..

The inventors of the present application first, in Japanese Patent Application No. 2017-170641, relate to a collection device in which nanofibers are discharged and supplied from a discharge nozzle of a nanofiber discharge device to a parallel collection rod and collected by the parallel collection rod. I have applied for an invention.
The nanofiber deposition molding apparatus and the deposition molding method thereof of the present invention exert a great effect by being applied to the collection apparatus disclosed in the above-mentioned Japanese Patent Application No. 2017-170641. As an embodiment of the discharge nozzle and the collection device, the collection device described in the above-mentioned Japanese Patent Application No. 2017-170641 is described, but this limits the discharge nozzle and the collection device to those of the Japanese Patent Application No. 2017-170641. It doesn't mean to do it.

Hereinafter, examples of the embodiment of the present invention will be described with reference to FIGS. 1 to 5. The nanofiber deposition / molding apparatus including the nanofiber ejection device and the nanofiber collecting apparatus according to the embodiment of the present invention shown in FIG. 1 is shown, and the nanofiber collecting means is provided by ejecting nanofibers from the ejection nozzle. It shows the state where nanofibers are collected and deposited.

Of course, the present invention is not limited to the specific embodiments described in the present embodiment as long as it does not contradict the gist of the invention, and can be easily changed by those skilled in the art. Needless to say, it is easily applicable. In particular, the discharge nozzle and the collection device are not limited to those disclosed in Japanese Patent Application No. 2017-170641, and application to general techniques is easy for those skilled in the art.

The nanofiber deposition / molding apparatus 1 of the present embodiment is roughly classified into a nanofiber discharge apparatus 2 and a nanofiber collection apparatus 15, and the molten or dissolved resin is stretched into a fiber having an ultrafine diameter to form a nanofiber F. Nanofiber F is discharged and supplied from the nanofiber discharge device 2 that manufactures the nanofiber discharge device 2 to the nanofiber collector device 15, and as shown in FIG. 1, the nanofiber is discharged from the discharge nozzle 2A that is the discharge port of the nanofiber discharge device 2. Nanofiber F is discharged and collected on the parallel collection rod 3 which is the nanofiber collection means of the fiber collection device 15.

The nanofiber deposition / molding apparatus 1 includes a collecting means rotating shaft 4, a scraping means rotating shaft 5, and a collecting means rotating shaft, which are provided in parallel with a frame (housing) 9 not shown in detail at the same height. A collection means drive motor for rotationally driving 4 and a scraping means drive motor for rotationally driving the scraping means rotating shaft 5 are provided. The collecting means rotating shaft 4 is stopped every time the collecting means rotating shaft 4 is rotated by 90 °, and immediately after the collecting means rotating shaft 4 is stopped, the collecting means rotating shaft 5 is provided with a rotation control means for rotating the scraping means rotating shaft 5 by 360 °. The discharged nanofibers are deposited and collected by the collecting means 3 stopped at the lower position shown in FIG. In the nanofiber F deposited and collected by the collecting means 3, the collecting means 3 rotates 45 ° in the M direction and the scraping means rotating shaft 5 rotates in the N direction, whereby the scraping means rotating shaft 5 It is scraped off by a U-shaped scraping rod 12 attached to the. The collection means drive motor, the scraping means drive motor, and the rotation control means are not shown because they are not the gist of the present invention.

FIG. 2 shows the details of the nanofiber collecting device 15. The collecting means rotating shaft 4 is provided with 11 parallel collecting rods 3 arranged in the axial direction of the collecting means rotating shaft 4. A falling-out prevention portion 10 that is bent and extended is formed at the tip of each of the parallel collecting rods 3.

Further, as shown in FIGS. 1 and 2, the parallel collecting rods 3 which are the 11 nanofiber collecting means of this embodiment are provided in four directions on the outer circumference of the collecting means rotating shaft 4.

As shown in FIG. 2, a U-shaped predetermined shape holding member 11 is fixed to each of the 11 parallel collecting rods 3 located on the left and right sides. The predetermined shape holding member 11 and the above-mentioned dropout prevention portion 10 protrude or fall off to the outside of the parallel collection rod 3 due to centrifugal force or the like caused by rotation of the nanofibers F collected by the parallel collection rod 3. Prevent it from happening.

As shown in FIG. 1, both ends of the U-shaped scraping rod 12 are fixed to the scraping means rotating shaft 5. Six scraping rods 12 provided on the scraping means rotating shaft 5 are arranged in the axial direction of the scraping means rotating shaft 5.

When the scraping means rotating shaft 5 is rotated by 360 ° by the rotation control means, the scraping rod 12 passes through the gap between the parallel collecting rods, and the nanofibers collected and deposited on the parallel collecting rod 3 Peel off F. A collection container 13 is installed below the nanofiber F that is peeled off from the parallel collection rod 3, and the nanofiber F that is peeled off from the parallel collection rod 3 is automatically moved to the collection container 13 by its own weight. Is recovered.

In this embodiment, when the parallel collecting rods 3 are arranged in the front-rear and vertical directions on the outer circumference of the collecting means rotating shaft 4, the rotation control means stops the rotational driving of the collecting means rotating shaft 4 (state of FIG. 1). ). Then, the nanofiber F is discharged from the discharge nozzle 2A of the nanofiber discharge device 2 only to the parallel collection rod 3 located below the collection means rotating shaft 4, and the parallel collection rod is discharged. When 3 is rotated 90 ° from it and is in a horizontally arranged state, the scraping means rotating shaft 5 is rotated 360 °, and the scraping rod 12 is accordingly collected by the parallel collecting rod 3. The nanofiber F that is brought into contact with F and collected by the parallel collection rod 3 is peeled off. Then, the stripped nanofiber F is automatically collected in the collection container 13.

Next, the discharge flow direction deflection means according to the embodiment of the present invention will be described. Here, the discharge flow direction deflecting means 16 for deflecting the flow of the nanofiber F discharged from the discharge nozzle 2A of the nanofiber discharge device 2 to the nanofiber collecting means 15 will be described below with reference to FIGS. 3 to 5. Although the discharge flow direction deflection means 16 of this embodiment is attached to the nanofiber discharge device 2, it may be configured on the nanofiber correction device 15 side.

The discharge flow direction deflecting means 16 deflects the discharge flow of the nanofiber F by applying a deflecting wind from the side surface direction of the discharge flow of the nanofiber F discharged from the discharge nozzle 2A to deflect the discharge flow in a desired direction. What is formed, that is, what shifts the discharge flow of the nanofiber F. In the discharge flow direction deflecting means 16, a plurality of air nozzles 17 that apply deflected wind from the side to the discharge flow of the nanofiber F from the discharge nozzle 2A are arranged in a circumferential shape. In the air nozzle 17 forming the deflected wind, the ejection angle of the deflected wind can be adjusted by the deflection angle adjusting plate 18. The deflection angle adjusting plate 18 is slidably mounted on the hollow disk-shaped holding frame 19 in the radial direction (the direction approaching or moving away from the discharge flow of the nanofiber F). A pipe for supplying deflected air is configured for the deflected air nozzle 17, but the pipe is not shown for simplification of the drawings. These pipes only need to guide the deflected wind to the air nozzle 17. In addition to the piping, a solenoid valve that turns on / off the pump and air supply is provided, but this can also depend on an appropriate configuration, and details will not be described in this specification. In the embodiment of the present invention, in addition to the discharge time of each air nozzle 17, the blower control means 21 for controlling various blower operations and the blower amount changing means 20 for electrically adjusting the blower amount of the air nozzle 17 are provided.

The hollow disk-shaped holding frame 19 having a plurality of air nozzles 17 mounted in a circumferential shape is located on the downstream side of the discharge nozzle 2A and is arranged concentrically so as to surround the discharge nozzle 2A, via a connecting frame (not shown). It is integrally configured with the nanofiber discharge device 2. As shown in FIGS. 3 to 5, eight air nozzles 17 composed of a plurality of air nozzles 17 are arranged concentrically around the arrangement of the discharge nozzles 2A at equal intervals (45 ° intervals). Of course, the plurality of air nozzles 17 are not limited to the eight arrangements at 45 ° intervals.

Further, each air nozzle 17 is attached to the holding frame 19 via a deflection angle adjusting plate 18. The deflection angle adjusting plate 18 is slidably mounted on the hollow disk-shaped holding frame 19 in the radial direction, that is, in the direction approaching or away from the discharge flow of the nanofiber F. The deflection angle adjusting plate 18 is an air nozzle blowing angle changing means for adjusting the blowing direction angle from the air nozzle 17.

In the method for depositing and molding nanofibers of the present invention, nanofibers are discharged from a discharge nozzle of a nanofiber discharge device that discharges molten or dissolved resin to a hot air flow and stretches them into fine-diameter fibers to produce nanofibers. However, a nanofiber deposition / molding apparatus is used in which the discharged nanofibers are collected and deposited by the nanofiber collecting means.
By deflecting the discharge flow direction by the discharge flow direction deflecting means 16 that deflects the discharge flow of nanofibers from the discharge nozzle to the nanofiber collecting means, the nanofiber deposition position is changed to deposit nanofibers having a desired predetermined shape. You get the body.

The discharge flow direction deflecting means 16 deflects the direction of the nanofiber discharge flow by applying a deflecting wind from the side surface direction of the nanofiber discharge flow into the flow path from the discharge nozzle to the nanofiber collecting means.

The discharge flow direction deflecting means 16 controls the blowing operation of the air nozzles arranged concentrically at equal intervals, for example, continuously in a clockwise or counterclockwise direction, or randomly. The blower control in this case may be on / off control of the blower of each air nozzle or control of the blower amount. As a result, it is possible to generate the deflected wind so as to go around the discharge flow of the nanofibers, or it is possible to randomly change the direction of the discharge flow. As a result, a nanofiber molded body having a predetermined shape can be formed.

According to the nanofiber deposition / molding apparatus 1 of the present embodiment as described above, the discharge direction of the nanofibers collected and deposited by the nanofiber collecting means is appropriately adjusted by the discharge flow direction deflecting means 16. It is possible to freely deposit and mold the nanofiber F, which is deposited and collected by the nanofiber collecting means, into a predetermined shape such as a square. As a result, it is possible to form a predetermined shape-forming body in the form of a sheet, a mat, or a block. Further, the nanofiber F can be uniformly deposited on the spray surface of the parallel collection rod 3 regardless of the amount of deposition.

Further, the deposition position of the nanofiber F deposited on the collecting means can be freely controlled by adjusting the blowing angle and the blowing amount of the air nozzle 17, so that the degree of freedom is not limited to the method of the collecting means. A sheet shape made of high-shaped nanofiber F can be created.

Further, the blower control means 21 rotates the blower ON-OFF operation of the air nozzles 17 arranged concentrically at equal intervals, for example, clockwise or counterclockwise continuously in order, or Since the ventilation of each air nozzle 17 can be controlled at random, it is not necessary to provide a large number of air nozzles, and the device structure can be simplified.

1 Nanofiber deposition / molding device 2 Nanofiber discharge device 2A Discharge nozzle (discharge port)
3 Parallel collection rod (nanofiber collection means)
4 Collection means rotation shaft 5 Scraping means rotation shaft 9 Frame (housing)
10 Falling prevention part 11 Predetermined shape holding member 12 Scraping rod 13 Collection container 15 Nanofiber collector 16 Discharge flow direction deflection means 17 Air nozzle 18 Deflection angle adjustment plate (air nozzle ventilation angle changing means)
19 Holding frame 20 Blower amount changing means 21 Blower control means (control means)
F nanofiber

Claims (4)

Nanofibers are discharged from the discharge nozzle of a nanofiber discharge device that discharges molten or dissolved resin to a hot air flow and stretches it into fine-diameter fibers to produce nanofibers, and the discharged nanofibers are captured by the nanofibers. A nanofiber deposition / molding device that collects and deposits on a collecting means.
A discharge flow direction deflecting means for deflecting the direction of the nanofiber discharge flow from the discharge nozzle to the nanofiber collecting means is provided.
The discharge flow direction deflecting means deflects the direction of the nanofiber discharge flow by applying a deflecting wind from the side surface direction of the nanofiber discharge flow in the flow path from the discharge nozzle to the nanofiber collecting means. Equipped with multiple air nozzles
The plurality of air nozzles are arranged concentrically with respect to the discharge nozzles at equal intervals.
It is equipped with an air nozzle blowing angle changing means for adjusting the blowing direction angle from the air nozzle.
The nanofiber deposition / molding apparatus, wherein the air nozzle blowing angle changing means is slidably mounted in a direction approaching or away from the discharge flow of nanofibers. The nanofiber deposition / molding apparatus according to claim 1, further comprising a means for changing the amount of air blown by the air nozzle. 1. 2. The nanofiber deposition / molding apparatus according to 2. The nano according to claim 1 or 2, wherein the nano has a blower control means for randomly controlling the blower on / off or the air volume of the air nozzles arranged concentrically at equal intervals. Fiber deposition and molding equipment.

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