JP2006069550A - Method and device for transferring magnetic powder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic powder transferring device capable of transferring magnetic powder in an arbitrary pattern. <P>SOLUTION: The magnetic powder transferring device 1 comprises a bundle 4 of hollow pipes 2, magnets 3 stored in a hollow part of each hollow pipe 2 arranged at the position corresponding to the magnetic powder transfer pattern, a holding body 5 arranged on the tip side of the hollow pipe 2, and a moving means 6 to move the holding body 5 and the magnet 3. The holding body 5 and the hollow pipe bundle 4 are moved to the magnetic powder transfer position on a surface of a loading body by the moving means while maintaining the magnetic powder on the surface of the holding body 5 by the magnetic force of the magnet 3. By separating the magnet 3 from the holding body 5 by a magnet moving means 30, the magnetic powder attracted to the surface of the holding body 5 is removed from the holding body 5 to load the magnetic powder on the surface of the loading body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to transfer and apparatus of magnetic powder for transferring magnetic powder such as iron powder onto the surface of a substrate such as nonwoven fabric.

  2. Description of the Related Art A heating element is known that fills a breathable container with iron powder and uses heat generated by oxidation of the iron powder by oxygen in the air. In recent years, various uses of the heating element as described above have been proposed, and an iron powder filling method corresponding to the form is desired.

  With regard to such a heating element manufacturing technique, the technique of Patent Document 1 below has been proposed. In this technique, magnets are arranged on the outer periphery of the drum at a predetermined interval, and while the drum is rotated, a sheet that forms an iron powder container is supplied to the peripheral surface of the drum, and acts from the back side of the sheet. After attracting the iron powder to the surface of the sheet by the magnetic force of the magnet, the other sheet is joined to seal the iron powder between the two sheets.

  By the way, this technique can cope with the case where the transfer pattern of the iron powder is a predetermined pattern, but the iron powder cannot be transferred to various patterns.

JP-A-6-191505

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic powder transfer method and apparatus that can cope with an arbitrary transfer pattern.

  The present invention relates to a magnetic powder transfer method for transferring magnetic powder onto the surface of a substrate, and a magnetic powder interposed between a magnet housed in a hollow portion of a hollow tube and the magnetic powder. The magnetic powder is moved to a desired position on the substrate while the magnetic powder is held on the surface of the powder holding body by the magnetic force of the magnet so that the magnetic force of the magnet does not reach the magnetic powder. By providing the method for transferring the magnetic powder, the magnetic powder is detached from the surface of the magnetic powder holder and the magnetic powder is placed on the surface of the substrate. Achieved.

  The present invention is also a magnetic powder transfer device for transferring magnetic powder onto the surface of a substrate, comprising a plurality of hollow tubes, a magnet accommodated in a hollow portion of the hollow tube, The object has been achieved by providing a magnetic powder transfer device provided with a magnetic powder holder disposed on the distal end side of an empty tube and a moving means for moving the holder and the magnet. Is.

  According to the magnetic powder transfer device of the present invention, the magnetic powder can be transferred in an arbitrary transfer pattern.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
1 and 2 schematically show a first embodiment of a magnetic powder transfer device (hereinafter also simply referred to as a transfer device) according to the present invention. In these drawings, reference numeral 1 denotes a transfer device, 10 denotes a substrate, and 11 denotes magnetic powder.

  As shown in FIG. 1, the transfer apparatus 1 of this embodiment has a plurality of hollow tubes 2 arranged in a bundle. And the magnet 3 is accommodated only in the hollow part 2 of the hollow tube arrange | positioned among these hollow tubes 2 in the position corresponding to the pattern of transfer of magnetic powder. These magnets 3 move up and down in the hollow portion by a magnet moving means 30 that moves the magnet 3 in the vertical direction of the hollow tube 2. At the tip of a plurality of hollow tubes 2 (this is a bundle of hollow tubes 2 and indicated by 4), a magnetic powder holding body 5 (hereinafter abbreviated as holding body 5) holding magnetic powder 11 is provided. ) Is provided. The magnetic powder 11 is attracted by the magnet 3 accommodated in the hollow portion of the hollow tube 2 and is held on the surface of the holding body 5. The holding body 5 is moved by the moving means 6.

  The arrangement form of the hollow tube 2 is set according to the transfer pattern of the magnetic powder and its area. In this embodiment, a total of 169 hollow tubes 2 are arranged in the same number (13 × 13) in the vertical and horizontal directions, and the hollow tubes 2 are arranged at positions corresponding to the transfer pattern of the magnetic powder. A magnet 3 described later is accommodated in the hollow portion of the hollow tube 2 formed. The transfer pattern is selected according to the product to be manufactured. In the present embodiment, as an example, as shown in FIG. 2, a pattern in which magnetic powder is placed on the outer periphery of the square and the central part thereof is shown. A total of 97 magnets 3 are accommodated in the hollow portion of the hollow tube 2. The inner diameter of the hollow tube 2 is set according to the outer diameter of the magnet 3. The thickness of the hollow tube 2 is set according to the fineness of the pattern, magnetic shielding ability, mechanical strength, durability and the like, but 0.1 to 5 mm is preferable in consideration of versatility and cost. The hollow tube 2 is preferably made of a nonmagnetic material such as a copper alloy or nonmagnetic stainless steel. All the hollow tubes 2 are supported by the frame 20 with their tips aligned.

  In the present embodiment, the magnet 3 has a rod-like form. The outer diameter of the magnet 3 is set according to the amount, particle size, specific gravity, etc. of the magnetic powder to be transferred, and considering the ease of creating a free magnetic pattern, it is preferably 0.5 to 15 mm, and 1.0 to 5 mm. More preferred. In the present embodiment, a permanent magnet is employed as the magnet 3, and examples of the permanent magnet include permanent magnets such as ferrite-based, neodymium-based, and cobalt-based rare earths.

  As described above, the magnet 3 is moved by the magnet moving means 30. In the present embodiment, the magnet moving means 30 includes a support bar 31 attached to the magnet 3 and a frame 32 connected to the support bar 31. A vertical movement mechanism 33 that moves the frame 32 up and down is provided. The vertical movement mechanism 33 is fixed to the frame 20 that supports the hollow tube 2. As the vertical movement mechanism 33, a known vertical movement mechanism such as an air cylinder unit or an electric cylinder unit is employed.

  The holding body 5 has a plate-like form, and is fixed to the distal end of the hollow tube 2 so as to block all the distal ends of the hollow tubes 2. The thickness of the holder 5 is set according to the magnetic force of the magnet 3 and is preferably made of a nonmagnetic material such as a copper alloy or nonmagnetic stainless steel.

  The moving means 6 includes a vertical movement mechanism 60 that supports the frame 20 and a horizontal movement mechanism 61 that horizontally moves the vertical movement mechanism 60. A cylinder unit 610 is employed for the vertical movement mechanism 60, and the frame 20 is attached to the tip of the rod. The horizontal movement mechanism 61 employs a carriage 601 that moves along a guide rail 600 installed horizontally, and a cylinder of the cylinder unit 610 is fixed to the carriage 601.

  In the present embodiment, magnetic powder attracting means 7 (see FIG. 1) is provided for reliably attracting the magnetic powder 11 detached from the surface of the holding body 5 to the mounted body side. The magnetic powder attracting means 7 includes a magnet 70 and a vertical movement mechanism 71 that moves the magnet 70 up and down, and is provided on the back surface of the substrate 10. The magnet 70 may be a permanent magnet or an electromagnet. In the case of an electromagnet, the vertical movement mechanism 71 can be omitted.

  The transfer device 1 includes a control unit (not shown), and the control unit controls the transfer device 1 as described below.

Next, an embodiment of the magnetic powder transfer method of the present invention will be described based on the magnetic powder transfer method using the transfer device 1.
First, as shown in FIG. 3A, the bundle 4 of the hollow tubes 2 and the holding body 5 are moved to the stock area of the magnetic powder by the carriage 601, and the frame 20 is lowered and held by the vertical movement mechanism 60. The body 5 is brought close to the surface of the magnetic powder 11. Then, the frame 32 is lowered by the vertical movement mechanism 33, and the magnetic powder is held on the lower surface of the holding body 5 by bringing the tip of the magnet 3 close to the holding body 5. The bundle 4 of hollow tubes 2 and the holding body 5 may be moved in a state where the magnet 3 is brought close to the holding body 5 in advance.

  Next, as shown in FIG. 3B, the frame 20 is pulled up by the vertical movement mechanism 60, and as shown in FIG. 3C, the bundle 4 of the hollow tubes 2 and the holding body 5 are mounted by the carriage 601. 10 Move to the transfer position of the magnetic powder on the surface. Then, after the frame 20 is lowered by the vertical movement mechanism 60 to bring the holding body 5 close to the surface of the mounted body 10, the frame 32 is raised by the vertical movement mechanism 33 as shown in FIG. When the tip of the magnet 3 accommodated in the hollow portion of the hollow tube 2 is separated from the holding body 5 so that the magnetic force of the magnet 3 does not reach the magnetic powder 11, the magnetic powder 11 is removed from the surface of the holding body 5. Detach and place on the substrate 10.

  Next, as shown in FIG. 3 (e), the frame 20 is pulled up by the vertical movement mechanism 60, and the magnet 70 is lowered by the vertical movement mechanism 71 to transfer (move) the magnetic powder 11 to the surface of the substrate 10. To complete). The transfer apparatus 1 repeats such an operation.

  As described above, according to the transfer device 1 of the present embodiment, the magnetic powder 11 can be transferred onto the surface of the substrate 10 in accordance with the transfer pattern. Further, the transfer device 1 can freely change the transfer pattern of the magnetic powder by selecting the hollow tube 2 that houses the magnet 3.

  FIGS. 4A and 4B and FIG. 5 show a second embodiment of the transfer apparatus of the present invention. In these drawings, the same reference numerals are given to portions common to the transfer device 1 of the first embodiment. Therefore, the description in the transfer device of the first embodiment is appropriately applied to a portion that is not particularly described.

  The transfer apparatus 1 ′ of the present embodiment employs a rotary system, and the peripheral surface portion 51 of the rotating drum 50 that rotates around the horizontal axis is the holding body 5. The bundles 4 of the hollow tubes 2 are arranged at four positions inside the holding body 5 at predetermined intervals. In the present embodiment, the hollow tube 2 is fixed to the holding body 5, and the tip portion thereof is aligned along the curved surface of the holding body 5.

  The transfer device 1 ′ of the present embodiment serves as a moving means 30 ′ of the magnet 3, an elastic body 34 that urges the magnet 3 toward the holding body 5, and the magnet 3 against the elastic force of the elastic body 34. 5 and a release magnet 35 that is separated from 5. A coil spring is employed for the elastic body 34. The hollow tube 2 provided with the elastic body 34 is closed at the upper end in order to obtain the reaction force of the elastic body 34. The release magnet 35 is composed of an electromagnet, and is fixed to a lower portion in the rotary drum 50 corresponding to the transfer position of the magnetic powder on the surface of the substrate 10.

  As shown in FIG. 4B, the transfer device 1 ′ of the present embodiment includes a motor 62 that rotates the rotating drum 50 as the bundle 4 of the hollow tubes 2 and the moving means 6 of the holding body 5. .

  The transfer device 1 'includes a control unit (not shown), and the control unit controls the transfer device 1' as described below.

  The transfer device 1 ′ of this embodiment transfers the magnetic powder 11 in cooperation with the attached magnetic powder supply means 8. The supply means 8 includes a storage box 80 that stores the magnetic powder 11, and a rotating drum 81 that is disposed above the storage box 80 and rotates around a horizontal axis. The rotating drum 81 includes a rotating outer cylinder 810 and an inner cylinder 811 fixed to the inner side of the rotating drum 81, and a magnet 812 is disposed at a position from about 6 o'clock to 2 o'clock on the peripheral wall portion of the inner cylinder 811. In this section, the magnetic powder 11 is held on the outer peripheral surface of the outer cylinder 811 that rotates around the outside by the magnetic force of the magnet 812. In the section where the magnet 812 is not disposed (between about 2 o'clock and 6 o'clock), the magnetic powder is released from the magnetic force of the magnet 812 and is held on the holding body 5 side as described later. A receiving tray 82 is provided below the storage box 80 to receive magnetic powder that has fallen without being held by the holding body 5.

  Next, another embodiment of the magnetic powder transfer method of the present invention will be described based on the magnetic powder transfer method using the transfer device 1 ′.

  First, the rotating drum 50 is rotated by the motor 62 shown in FIG. 4B, and the bundle 4 of the hollow tubes 2 and the holding body 5 are fed to the magnetic powder 11 from the supply means 8 as shown in FIG. Move to the delivery position. Then, the magnetic powder 11 that is separated from the outer peripheral surface of the outer cylinder 811 of the rotary drum 81 is attracted to the holding body 5 side by the magnetic force of the magnet 3, and is delivered to and held on the surface of the holding body 5. The delivery of the magnetic powder 11 may be performed while rotating the rotary drum 50 or may be stopped.

  Next, as shown in FIG. 6A, the bundle 4 of the hollow tubes 2 and the holding body 5 are moved to the transfer position of the magnetic powder on the surface of the substrate 10. Then, after the holding body 5 is brought close to the surface of the mounted body 10, as shown in FIG. 6B, the release magnet 35 is operated (energized) and the magnet 3 is pulled up by the magnetic force of the release magnet 35. When the magnetic force of the magnet 3 does not reach the magnetic powder 11 held on the surface of the holding body 5, the magnetic powder 11 is detached from the surface of the holding body 5 and placed on the surface of the substrate 10. . At this time, similarly to the first embodiment, the magnetic powder drawing means 7 is operated.

  Next, as shown in FIG. 6C, the rotating drum 50 is further rotated and the magnet 70 is lowered by the vertical movement mechanism 71 to complete the transfer of the magnetic powder 11 onto the surface of the substrate 10. The transfer device 1 ′ repeats such an operation.

  As described above, according to the transfer device 1 ′ of the present embodiment, the magnetic powder 11 is placed on the surface of the substrate 10 according to the transfer pattern in the same manner as the mounting device 1 of the first embodiment. Can be transferred. The transfer pattern of the magnetic powder can be freely changed by the same method as in the first embodiment. The transfer device 1 ′ of this embodiment can be suitably used for transferring magnetic powder onto the surface of a substrate such as a continuous belt-like sheet.

  The present invention is not limited to the embodiment. For example, an electromagnet can be used instead of a permanent magnet for a magnet that holds magnetic powder via a holder. In this case, by arranging an electromagnet in the hollow part of all the hollow tubes and energizing only the electromagnet arranged at the position corresponding to the placement pattern, the magnetic powder is in a form corresponding to the placement pattern. The body can be held on the surface of the holding body. When an electromagnet is used, the electromagnet moving means can be omitted.

  In addition, the magnetic powder attracting means can employ a suction means instead of a magnet.

The magnetic powder to be transferred of the present invention is not particularly limited as long as it is magnetized by a magnet and can be held on a holder. Examples of the magnetic powder include iron powder and iron powder whose surface is coated with a resin. The transfer method and transfer apparatus of the present invention can also be applied to transfer of a mixture of the magnetic powder and fibers such as pulp and synthetic fiber, or non-magnetic powder.
Further, the material of the support is not particularly limited as long as the magnetic powder can be placed thereon. Examples of the substrate include a nonwoven fabric, a woven fabric, paper, a resin sheet, or a composite sheet obtained by laminating these.

It is a figure which shows typically 1st Embodiment of the transfer apparatus of the magnetic powder of this invention. It is a principal part top view which shows the arrangement | positioning relationship of the bundle | flux of a hollow tube, and a magnet. It is a figure which shows typically the transfer process of the magnetic powder by the transfer apparatus of 1st Embodiment, (a) is a figure which shows the state holding magnetic powder, (b) and (c) The figure which shows a movement state, (d) is a figure which shows the state which is moving, (e) is a figure which shows the state which the transfer was completed. It is a figure which shows 2nd Embodiment of the transfer apparatus of the magnetic powder of this invention typically, (a) is a front view, (b) is a side view. It is a principal part expanded sectional view for demonstrating the magnet moving means in the transfer apparatus of 2nd Embodiment. It is a figure which shows typically the transfer process of the magnetic powder by the transfer apparatus of 2nd Embodiment, (a) is a figure which shows the state holding magnetic powder, (b) is transferred. (C) is a figure which shows the state which the transfer was completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 'Magnetic powder transfer apparatus 2 Hollow tube 3 Magnet 30, 30' Magnet moving means 4 Bundle of hollow tubes 5 Magnetic powder holder 6 Moving means 7 Magnetic powder attracting means 10 Mounted object 11 Magnetic powder

Claims (5)

A magnetic powder transfer method for transferring magnetic powder onto the surface of a substrate,
The magnetic powder is held in a state where the magnetic powder is held by the magnetic force of the magnet on the surface of the magnetic powder holding body interposed between the magnet accommodated in the hollow portion of the hollow tube and the magnetic powder. The magnetic powder is separated from the surface of the holding body by moving the magnetic powder to a predetermined position on the mounting body so that the magnetic force of the magnet does not reach the magnetic powder, and the magnetic powder is removed from the surface of the mounting body. Of transferring magnetic powder to be placed on the surface. A magnetic powder transfer device for transferring magnetic powder to the surface of a substrate,
A plurality of hollow tubes, a magnet housed in a hollow portion of the hollow tube, a magnetic powder holding body disposed on the distal end side of the hollow tube, and a moving means for moving the holding body together with the magnet A magnetic powder transfer apparatus comprising:   The magnetic powder transfer device according to claim 2, further comprising a magnet moving means for moving the magnet so that the magnet approaches or separates from the holding body.   The magnetic powder transfer according to claim 2 or 3, wherein a peripheral surface portion of a rotary drum rotating around a horizontal axis constitutes the holding body, and a plurality of the hollow tubes are disposed inside the holding body. Mounting device. The magnetic powder transfer device according to any one of claims 2 to 4, further comprising a magnetic powder drawing means for drawing the magnetic powder from the back side of the substrate.

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