JP2017051946A - Electrified powder guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrified powder guide device capable of uniformly forming a powder layer.SOLUTION: An electrified powder guide device of the present invention includes a body for placing a coating object member and a conductive element provided in a position corresponding to a place for placing the coating object member of the body, and increases powder of sticking to a side surface of the coating object member by finely adjusting the direction of an electric field by the conductive element so that a rise movement route of electrified powder becomes a circular arc shape, and a thickness in respective outer surfaces of the coating object member of the powder substantially coincides, to thereby, attain a desire of a uniformity degree of a suitable powder layer.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an apparatus for forming a uniform powder layer on a workpiece, and more particularly to a powder guide apparatus.

  Along with the development of the electronic industry, electronic products are becoming lighter and smaller in size, and functions are being developed with higher performance, higher functionality, and higher speed.

  In the conventional LED manufacturing process, the phosphor is formed by means such as a dispenser or spray. In a generally used coating method, it is difficult to control the amount applied to each part of the member to be coated, so the amount of phosphor in each part is not uniform, that is, the thickness of the phosphor varies. Easy to lean on.

  Moreover, when performing the spray method by a scattering plate, as shown in FIG. 1, the scattering plate 10 which has several fine holes (not shown), the supply part 11 provided under the said scattering plate 10, and several And a chuck unit 12 that holds the light emitting diode element 13, and the supply device 1 in which the powder 8 is placed on the scattering plate 10 is used.

  When the supply device 1 is used, the chuck portion 12 is disposed on the scattering plate 10, and the wind pressure A is provided below the scattering plate 10 by the gas supplied from the side surface of the supply portion 11. Passes through the fine holes of the scattering plate 10 and scatters the powder 8 to the chuck portion 12 to adhere to the chuck portion 12.

  However, in the supply device 1, the wind pressure A is sprayed on the entire lower surface of the scattering plate 10 and directly hits the powder 8, but the direction of the wind that has passed through the fine holes cannot be controlled. If the wind pressure A passes through the scattering plate 10, random flow such as turbulent flow is likely to occur, and the powder 8 cannot be evenly scattered, and evenly sprayed on the chuck portion 12. Can not. For this reason, the powder 8 cannot adhere evenly to the light emitting diode elements 13 and cannot reach a suitable uniformity. For example, as shown in FIG. 2, the powder 8 attached to the side surface 13 c of the light emitting diode element 13 is very small, and the thickness t of the powder 8 on the side surface 13 c of the light emitting diode 13 is the same as that of the light emitting diode 13. It is extremely thin compared to the thickness d of the powder 8 on the upper surface 13a.

  Further, the micropores of the scattering plate 10 are extremely small in size and are easily clogged with the powder 8 during use, so that the wind pressure A can only pass through a partial region of the scattering plate 10. For this reason, the powder 8 cannot adhere evenly to the chuck portion 12 and cannot reach a suitable uniformity.

  Therefore, overcoming various conventional problems is a problem to be solved.

  In view of the problems of the above-described conventional technology, the present invention includes a main body on which a member to be coated is placed, and a conductive element provided at a position corresponding to a position on the main body where the member to be coated is placed. A charged powder guide device is provided.

  In one embodiment of the charged powder guide device, the conductive element is embedded in the main body.

  In one embodiment of the charged powder guide device, the charging powder guide device further includes a coupling member provided on the conductive element and coupling the member to be coated.

  In one embodiment of the charged powder guide device, the conductive element is a metal block or a block capable of inducing an electric field.

  In one embodiment of the charged powder guide device, the conductive element is provided on the main body so that the main body and the member to be coated are located on opposite sides.

  In one embodiment of the charged powder guide device, the conductive element has a through hole provided at a position corresponding to a place where the member to be coated is placed. In one embodiment, the charged powder guide device further includes an insulating layer provided on the opposite side of the member to be coated of the conductive element, and the through hole extends through the insulating layer. To do.

  In one embodiment of the charged powder guide device, the conductive powder guide device further includes a conductive layer provided on the opposite side of the member to be coated of the conductive element. The conductive layer and the conductive element are integrally formed.

  In one embodiment of the charged powder guide device, in the conductive element and the conductive layer, a through hole communicating with each other is provided at a position corresponding to a place where the member to be coated is placed.

  In another embodiment including a conductive layer, the conductive element is embedded in the main body, and the charged powder guide device has a polarity electrically repelling the charged powder, It further includes a spacer embedded in the main body so as to be located in the periphery. The charged powder guide device is provided on the conductive element, and is provided on the main body or the conductive layer for coupling the member to be coated, and determines the position of the coupling member on the conductive element. And a positioning unit.

  In one embodiment of the charged powder guide device, a ratio of the width of the conductive element to the width of the member to be coated is 0.7 to 1.5.

  The charged powder guide apparatus may further include a spacer provided on the main body so as to be positioned around the conductive element.

  As described above, according to the charged powder guide device of the present invention, the direction of the electric field is finely adjusted by the conductive element so that the ascending movement route of the charged powder becomes an arc shape. The powder adhering to the side surface of the member to be coated is increased, and the thickness of the powder on each outer surface of the member to be coated is substantially the same, so that the demand for suitable uniformity of the powder layer is achieved. .

It is sectional drawing which shows the conventional supply apparatus. It is a local enlarged view of FIG. It is sectional drawing which shows an electrostatic deposition apparatus provided with the charged powder guide apparatus which concerns on this invention. It is a local enlarged view of the charged powder guide apparatus shown in FIG. It is sectional drawing which shows one Embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows different embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows different embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows different embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows different embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows different embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows other embodiment of the charged powder guide apparatus which concerns on this invention. It is sectional drawing which shows other embodiment of the charged powder guide apparatus which concerns on this invention.

  Embodiments of the present invention are described as follows using specific embodiments. In addition, those skilled in the art will appreciate other advantages and benefits of the present invention based on the disclosure herein.

  Note that the structure, scale, size, and the like shown in the drawings attached to this specification are merely adapted to the disclosure of this specification so that they can be easily understood by those skilled in the art. Yes, it does not limit the present invention and may vary in actual application, so any structural modifications, scale changes or size adjustments may be made as long as they do not affect the effect and purpose of the present invention. It should be noted that these can be performed and are within the scope of the technical content of the present invention. In addition, terms such as “above”, “first”, “second”, “one” and the like described in this specification are simply used for convenience of explanation, and do not limit the present invention. In addition, unless the technical contents are substantially changed, changes and adjustments of the relative relationship are considered to be included in the scope of the present invention.

  In the following embodiments of the present invention, the oscillation source is assumed to generate any acting force that can vibrate charged powder such as pulse conduction, fluid power, sound wave, or ultrasonic wave, and the member to be coated is an LED element. However, it is not limited to this.

  In addition, the present invention does not transport the charged powder to the deposition site by wind pressure, but scatters the stationary charged powder or the charged powder placed on the stacking section by the oscillation source, and the same on the stacking section. Polarized electric field causes scattered charged powder to adhere to the deposition site to form a uniform powder layer, and preferably forms a more uniform powder layer of charged powder by taking into account the degree of scattering caused by vibration It is something to be made.

  As shown in FIG. 3, the charged powder guide device 2 uses the stacking unit 5 and the oscillation source 6 together.

  The stacking unit 5 has a first side 5a and a second side 5b facing each other, and powder 9 is mounted on the first side 5a of the stacking unit 5.

  In the present embodiment, the powder 9 includes a plurality of powder particles 90 and an adhesive material 91. For example, the adhesive material 91 is a solid granule, and may be adhered or separated from the powder material 90, Or you may enclose the granular material 90. FIG. The powder body 90 may be a powder body such as fluorescent powder, nanotube, quantum dot, carbon tube, graphene, or the like.

  The oscillation source 6 is located at a location separated from the second side 5b of the stacking unit 5 and oscillates the stacking unit 5 to vibrate the powder particles 90 and the adhesive 91 on the first side 5a. Let In another embodiment, the oscillation source 6 may be in contact with the second side 5b of the stacking unit 5, and may be, for example, a pulse oscillation device, a cam device, or a water discharge device.

  The charged powder guide device 2 is positioned away from the upper side of the first side 5a of the loading unit 5 and receives the charged powder particles 90 and the adhesive 91. In order to deposit the charged powder particles 90 and the adhesive 91 on the applying member, the member 23 to be applied is placed on the charged powder guide device 2.

  In the embodiment applied to the plurality of coated members 23, the charged powder guide device 2 is separated from the main body 20 by a plurality of spaces embedded in the main body 20 corresponding to the places where the coated members 23 are placed. It includes a conductive element 21 and a coupling member 22 that is provided on the main body 20 and couples the member 23 to be coated. Specifically, the main body 20 is an insulator, the conductive element 21 is a metal block or another block capable of inducing an electric field, and the coupling member 22 may be a heat peelable film or tape, but is not limited thereto. Not.

  When the member 23 to be coated is coupled to the position corresponding to the conductive element 21 by the coupling member 22, when the electrostatic deposition apparatus shown in FIG. 3 is operated, a DC high voltage is applied to the stacking unit 5 to generate an electric field. Then, the particles 90 and the adhesive 91 are charged with a charge (for example, a negative charge, “−” shown in the figure). Further, an electric field having the same polarity as that of the loading unit 5 is generated in the charged powder guide device 2, and an electric field having a different polarity (a positive electric field in this embodiment) is generated in the conductive element 21. Then, the oscillation source 6 is operated to transmit the acting force of the oscillation source 6 to the stacking unit 5 to vibrate the stacking unit 5, and the charged powder particles 90 and the adhesive 91 placed on the first side 5 a. And scatter. The charged powder particles 90 and the adhesive 91 are separated from the first side 5 a by the electric field and rise to the charged powder guide device 2, and the charged powder particles 90 are attached to the coated member 23 by the adhesive 91.

  As a result, the oscillation source 6 vibrates the stacking unit 5 and indirectly moves the charged powder particles 90 and the adhesive 91 so that the charged powder particles 90 and the adhesive 91 are scattered by the vibration, thereby inducing an electric field. Adheres to the member to be coated 23, that is, an upward acting force is increased between the loading portion 5 and the charged powder guide device 2 by electrostatic force or electric field force, and the loading portion 5 and the charged powder guide device 2 Since there is no other external force (for example, conventional wind pressure) that interferes with the upward acting force, the moving direction (that is, upward) of the charged powder particles 90 and the adhesive 91 can be controlled effectively. Since the charged powder particles 90 scattered by vibration at each vibration location and the scattering height of the adhesive 91 coincide with each other, the uniformity of the powder particles 90 attached to the member to be coated 23 is ensured.

  Further, a power supply device (not shown) for supplying electric charges to the stacking unit 5 may be provided on the first side 5a of the stacking unit 5 so that the polarities of the electric fields of the stacking unit 5 and the charged powder guide device 2 are matched. In addition, as another embodiment, the stacking unit 5 itself includes a power feeding device without being electrically connected to an external power feeding device.

  In another embodiment, the loading unit 5 may be charged with a positive electric field. In this case, the charged powder guide device 2 is charged with a positive electric field, and the conductive element 21 is charged with a negative electric field or connected to the ground. Will do.

  According to the charged powder guide device 2 of the present invention, the conductive element 21 is provided at a position corresponding to the place where the coated member 23 is placed, so that the direction of the electric field is adjusted and the charged powder particles 90 are bonded. The upward movement route of the material 91 has an arcuate shape S, and a large amount of the powder 9 can be attached to the side surface 23c of the member to be coated 23, and the powder 9 on the side surface 23c of the member to be coated 23 as shown in FIG. And the thickness of the powder 9 on the upper surface 23a of the member 23 to be coated are substantially the same, and a desired uniformity of the powder layer is achieved.

  Further, the width r of the conductive element 21 is approximately 0.7 to 1.5 times the width w of the member to be coated 23 (that is, r = 0.7 w to 1.5 w) so as to contribute to the adjustment of the electric field direction. Is preferred.

  5A to 5F are sectional views showing different embodiments of the charged powder guide device according to the present invention.

  As shown in FIG. 5A, the charged powder guide device 3 a includes a main body 30, a plurality of spaced apart conductive elements 21 provided on the main body 30 corresponding to places where the member 23 to be coated is placed, And a coupling member 22 that is provided in the conductive element 21 and couples the member 23 to be coated. Specifically, the conductive element 21 may be a metal block or another block capable of inducing an electric field, and the bonding member 22 may be a heat peelable film or a tape, but is not limited thereto.

  In the present embodiment, each conductive element 21 is provided with at least one through hole 32 for vacuum-suctioning the coupling member 22 so as to stabilize the coupling of the member 23 to be coated. A suction device may be included.

  As shown in FIG. 5B, the charged powder guide device 3b includes a main body 20 and a plurality of spaced-apart conductive elements 21 embedded in the main body 20 corresponding to the place where the member 23 to be coated is placed. In addition, the conductive element 21 may be a metal block or another block capable of inducing an electric field, but is not limited thereto.

  In the present embodiment, the conductive element 21 is provided with a through hole 32 for vacuum suction of the coated member 23, and a vacuum suction device (not shown) is communicated with the through hole 32.

  As shown in FIG. 5C, the charged powder guide device 3c is obtained by adding an insulating layer 31 to the structure of FIG. 5B. Specifically, the insulating layer 31 is provided in the main body 20 and the conductive element 21 on the opposite side of the conductive element 21 to the coated member 23. Further, the through hole 32 for vacuum-suctioning the member to be coated 23 extends through the insulating layer 31.

  As shown in FIG. 5D, the charged powder guide device 3d is obtained by adding a conductive layer 33 to the structure of FIG. 5B. Specifically, the conductive layer 33 is a plate material provided on the main body 20 and the conductive element 21 on the opposite side of the member to be coated 23 of the conductive element 21. In this case, the through hole 32 is not formed in the conductive element 21 and the conductive layer 33.

  In the present embodiment, since the conductive layer 33 and the conductive element 21 are integrally formed, a bump may be formed by cutting a part from a conductive plate material in manufacturing, and the bump may be used as the conductive element 21. .

  Further, as shown in FIG. 5E, the through hole 32 may be formed in the charged powder guide device 3e, that is, a position corresponding to a place where the member 23 to be coated is placed on the conductive element 21 and the conductive layer 33. A through hole 32 communicating with each other may be provided.

  As shown in FIG. 5F, in the charged powder guide device 3f, the conductive element 21 is embedded in the main body 20, and has a polarity that electrically repels the charged powder and is positioned around the conductive element 21. The spacer 40 embedded in the main body 20, the conductive element 21 and the main body 20, the coupling member 22 for coupling the member to be coated 23, and the positioning portion 34 provided on the main body 20 or the conductive layer 33. And including. The positioning portion 34 may be a symbol, and may be any means for positioning the recess or the coupling member shown in FIG. 5F on the conductive element. In the embodiment shown in FIG. 5F, the position where the convex portion 221 of the coupling member 22 is inserted becomes the positioning portion 34 that determines the position.

  FIG. 6A is a sectional view showing another embodiment of the charged powder guide device according to the present invention.

  As shown in FIG. 6A, the charged powder guide device 4a includes a main body 20, a plurality of spaced-apart conductive elements 21 embedded in the main body 20 corresponding to the place where the member 23 to be coated is placed, And a spacer 40 provided on the main body 20 so as to be positioned around the element 21.

  In the present embodiment, the spacer 40 surrounds the side surface of the member to be coated 23 and has a polarity that electrically repels the charged powder, thereby contributing to the adhesion of the powder to the side surface of the member to be coated 23. Specifically, as shown in FIG. 6A, the powder has a negative polarity, the conductive element 21 may be connected to the ground or have a positive polarity, and the spacer 40 also has a negative polarity. As the spacer 40 is approached, the powder is forcibly attached to the side surface of the member to be coated 23 by the electric repulsive force.

  In the specific embodiment shown in FIG. 6B, both the conductive element 21 and the spacer 40 of the charged powder guide device 4b are adjusted to adjust the degree of the charged powder adhering to the side surface of the coated member 23. It may be embedded inside.

  The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. A person skilled in the art in this field can change the embodiment without departing from the spirit and spirit of the present invention. Accordingly, the scope of the present invention is as set forth in the appended claims.

  DESCRIPTION OF SYMBOLS 1 ... Supply apparatus, 10 ... Scattering plate, 11 ... Supply part, 12 ... Chuck part, 13 ... Light emitting diode element, 2, 3a, 3b, 3c, 3d, 3e, 3f, 4a, 4b ... Charged powder guide apparatus, DESCRIPTION OF SYMBOLS 20,30 ... Main body, 21 ... Conductive element, 22 ... Coupling member, 221 ... Convex part, 23 ... Coated member, 13a, 23a ... Upper surface, 13c, 23c ... Side surface, 31 ... Insulating layer, 32 ... Through-hole, 33 ... conductive layer 34 ... positioning part 40 ... spacer 5 ... stacking part 5a ... first side 5b ... second side 6 ... oscillation source 8,9 ... powder, 90 ... powder body, 91 ... Adhesive, A ... wind pressure, S ... arc shape, d, t ... thickness, w, r ... width

Claims (14)

A main body on which the member to be coated is placed;
A conductive element provided at a position corresponding to a place on which the coated member of the main body is placed;
Including a charged powder guide device.   The charged powder guide device according to claim 1, wherein the conductive element is embedded in the main body.   The charged powder guide device according to claim 1, further comprising a coupling member that is provided on the conductive element and couples the member to be coated.   The charged powder guide device according to claim 1, wherein the conductive element is a metal block or a block capable of inducing an electric field.   2. The charged powder guide device according to claim 1, wherein the conductive element is provided on the main body such that the main body and the member to be coated are located on opposite sides.   The charged powder guide device according to claim 1, wherein the conductive element has a through hole provided at a position corresponding to a place where the member to be coated is placed.   The charged powder guide device according to claim 6, further comprising an insulating layer provided on a side of the conductive element opposite to the member to be coated, wherein the through hole extends through the insulating layer.   The charged powder guide apparatus according to claim 1, further comprising a conductive layer provided on an opposite side of the member to be coated of the conductive element.   The charged powder guide apparatus according to claim 8, wherein the conductive layer and the conductive element are integrally formed.   The charged powder guide device according to claim 8, wherein in the conductive element and the conductive layer, a through hole communicating with each other is provided at a position corresponding to a place where the member to be coated is placed. The conductive element is embedded in the body;
The charged powder guide device according to claim 8, further comprising a spacer that is electrically repelled by the charged powder and is embedded in the main body so as to be positioned around the conductive element. A coupling member provided in the conductive element and coupling the coated member;
The charged powder guide device according to claim 11, further comprising a positioning portion that is provided on the main body or the conductive layer and positions the coupling member on the conductive element.   The charged powder guide device according to claim 1, wherein a ratio of a width of the conductive element to a width of the member to be coated is 0.7 to 1.5.   The charged powder guide device according to claim 1, further comprising a spacer having a polarity that is electrically repelled by the charged powder and provided on the main body so as to be positioned around the conductive element.