JP4504499B2 - Method for producing electrode for powder transportation in electrostatic powder transportation apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing an electrode for powder transportation in an electrostatic powder transportation apparatus.
[0002]
[Prior art]
As a powder transport electrode in a conventional electrostatic powder transport apparatus, a panel-shaped electrode is disclosed in JP-A-7-267363, a pipe-shaped electrode is disclosed in JP-A-8-149859, and a dot-shaped electrode is used. JP-A-8-201702 discloses this.
[0003]
Japanese Patent Application Laid-Open No. 10-236649 filed by the applicant of the present application describes panel-shaped and pipe-shaped electrodes, and Japanese Patent Application Laid-Open No. 11-165872 describes dot-shaped electrodes.
[0004]
The above-mentioned structure of the electrode for powder transport is related to the powder transport control.
That is, the transported powder is fine particles, and the powder transport electrode is placed on a number of electrodes that are insulated and arranged in the transport direction with a pitch corresponding to the particle size. It is controlled to apply a multi-value multiphase alternating voltage (signal) to each electrode in time series so that a traveling wave of an electric field potential is formed between the electrodes in the feed direction.
[0005]
In particular, since the dot-type transport electrodes targeted by the present invention correspond to the electrodes and charged particles individually, as described in JP-A-8-201702, the electrodes are arranged in a single row at a fine pitch. The structure is difficult to make.
[0006]
[Problems to be solved by the invention]
In order to manufacture the dot type electrode as described above, the insulated conductors are arranged and hardened with resin or the like, then wiring is performed, or a printed circuit board is used as described in JP-A-8-201702. It is.
[0007]
However, in any of the conventional methods described above, if the transport distance is increased, the number of electrodes increases, making it difficult to arrange the electrodes at a uniform pitch, and each electrode has a large traveling wave voltage. Since it is applied by the multi-phase alternating voltage, the wiring for applying the multi-value multi-phase alternating voltage becomes complicated, and the manufacturing difficulty increases greatly when a small pitch between the electrodes is required. And it becomes difficult to make things with various shapes.
[0008]
The present invention has been made in view of the above-mentioned problems of the prior art, and can obtain a highly accurate inter-electrode pitch by a simple method and can easily apply multi-phase signal wiring. It is an object to easily obtain various electrode structures.
[0009]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) A method for producing an electrode for powder transport in an electrostatic powder transport apparatus in which powder particles are charged and transported in a traveling-wave electric field atmosphere, comprising a plurality of insulated coated wires A process of forming a twisted wire of a multi-helix structure having at least one bent portion along the axial direction, arranged in parallel, closely twisting the core portion, and the top of the bent portion of the twisted wire as part of the core of the insulated wire is exposed to definitive in, by scraping the coating is intended to include a step of forming a dot-like electrodes.
[0010]
(2) A method of manufacturing an electrode for powder transport in an electrostatic powder transport apparatus in which powder particles are charged and transported in a traveling wave electric field atmosphere, and a plurality of insulated coated electric wires side by side in parallel, after winding helically into a flat strip-shaped core made of a flexible material, together with electric wires wound around the core so as to deform the core, in the strip-shaped core on both sides wire is wound wrapping wound, forming a bent portion along the axis direction, such that a portion of the core of the insulated wire to definitive on top of the bent portion is exposed, the coating Scraping and forming a dot-like electrode .
[0011]
(3) In the above (1) or (2) term, the top portion of the bent portion, forming a dot-like electrodes, at least in bent portions, which comprises a step of fixing the adjacent electric wires to each other And
[0012]
(4) In any one of the above items (1) to (3) , after the step of forming the dot-like electrode on the top of the bent portion fixes the whole by sandwiching both sides of the bent portion with a reinforcing material The top of the bent portion is polished until the coating of the electric wire is peeled off .
[0013]
(5) In any one of the above items (1) to (4) , the step of forming a dot-like electrode on the top of the bent portion is a dot-like shape in which the insulating layer for charging the powder particles is cut out. It includes a step of forming on the entire surface of the electrode .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereafter, the implementation point of the method of this invention is demonstrated, referring an accompanying drawing.
The present invention relates to a method for manufacturing a powder transport electrode in an electrostatic powder transport apparatus in which powder particles are charged and transported in a traveling wave electric field atmosphere. FIG. 4 shows an implementation procedure of the method of the present invention.
[0015]
First, as shown in FIG. 1, a plurality of insulation-coated wires (1) are arranged in parallel, and at least one bent portion (2) is formed and wound in a spiral shape.
Since a voltage between lines, for example, a high voltage of 500 volts or more is applied to the insulation-coated electric wire (1), a single-wire insulation-coated electric wire coated with a high-voltage insulation layer is suitable for the electric wire (1). Yes. The thickness of the insulating coating layer is determined in consideration of the high voltage and the line pitch.
[0016]
The core (3) has a flat strip shape, and one long side (3a) in the longitudinal direction is thin at the end, rounded with a small radius at the tip, and sharpened at the end. It is.
[0017]
Depending on the number of phases of the multi-value multi-phase alternating voltage required to form the traveling wave electric field atmosphere for transporting the charged particles, the insulation-coated electric wire (1) has a plurality of wires on the outer periphery of the core (3). They are lined up in parallel and tightly wound.
[0018]
In addition, when making the distance between electric wires larger than a wire diameter, another wire which does not form an electrode may be pinched | interposed and pinched | interposed between each insulation coating electric wire (1).
[0019]
As the multi-value multi-phase alternating voltage required for forming the traveling wave electric field atmosphere, the simplest ternary three-phase, three-value six-phase rectangular wave alternating voltage is usually used. Phase alternating voltages such as triangular wave, sawtooth wave, sine wave, etc. are used, and in the embodiment, one corresponding to a ternary 6 phase rectangular wave is shown.
[0020]
The insulation-coated electric wire (1) is wound with six wires arranged in parallel for six phases. In FIG. 1, letters a to f attached to the respective insulation-coated wires (1) indicate the phases of the alternating voltage.
[0021]
As shown in FIG. 1, when six insulated wires (1) are tightly wound around a strip-shaped core (3) with sharp side edges, that is, long sides (3a), the number of insulated wires (1) is increased. Form a spiral. This multi-strand spiral has a feature that it advances by a half pitch when each strip line (each phase) makes a half turn.
[0022]
The insulation-coated electric wire (1) that is reversed and bent at the sharp long side (3a) of the core (3) forms a bent portion (2) that is aligned in the direction of the long side (3a).
[0023]
2 to 4 show a procedure for forming a dot-like electrode on the top (2a) of the bent portion (2).
[0024]
First, as shown in FIG. 2, a reinforcing plate (4) made of an insulating material is applied to both flat side surfaces of the insulation-coated electric wire (1) wound around the winding core (3).
[0025]
Next, as shown in FIG. 3, the synthetic resin material (5) is injected into the joint between the insulation-coated electric wire (1) and the reinforcing plate (4), and the whole is integrally hardened.
[0026]
Next, as shown in FIG. 3, the insulation-covered electric wire (1) covering the top portion (2a) of the synthetic resin material (5) and the bent portion (2) is cut into a plane together with the reinforcing plate (4). Then, the dot-like electrode (6) is formed by the portion where the coating in the insulating coated electric wire (1) is peeled off .
[0027]
An insulating layer (7) for preventing discharge is formed on the entire surface of the dot electrode (6) cut out in this way.
This insulating layer (7) can also be used for charging the powder particles.
[0028]
In the above example, the core (3) is not removed, and it has been explained in the manner of embedding in the powder transport electrode. However, in the same way as in FIG. After winding (1), except for the core (3), the spirally wound cylindrical insulated wire (1) has at least a bent portion (2) extending in the axial direction. After squeezing flat so that one or more places are formed, the reinforcing plates (4) may be applied from both sides, and these may be integrally hardened with the synthetic resin material (5).
[0029]
5 and 6 show another implementation procedure.
First, as the core (3A), a flat strip-like one similar to the core (3) in FIG. 1 is used, but the short side (3b) is made considerably longer than that in FIG. And both side edges of the long side (3a) are sharpened (not shown).
[0030]
The winding core (3A) is made of a flexible material, and after winding the insulated wire (1), as shown in FIG. 5, the cross-sectional shape viewed in the longitudinal direction is an upward U-shape. Bend it. Next, as shown in FIG. 6, the electrode (6) is formed by scraping the coating on the upper surface of the bent portion (2) formed by the insulation-coated electric wire (1).
[0031]
If the above-described winding core (3A) is made of a thermoplastic material, deformation processing after winding is facilitated. If the core (3A) is made of a thermoplastic material, the insulation-coated electric wire (1) is pressed against the core (3A) by pressing the insulation-coated electric wire (1) against the core (3A) in a heated state. It can also be embedded.
[0032]
FIG. 7 shows still another implementation procedure.
In this embodiment, first, a plurality of insulation-coated wires (1) indicated by a to f are arranged in parallel, and the core portions are densely twisted to form a stranded wire (8). The curvature of the twisted portion in the stranded wire (8) is as small as that of the bent portion (2) in FIG.
[0033]
Accordingly, the stranded wire (8) has a multi-strand structure having an infinite number of bent portions (2) extending in the axial direction.
[0034]
After this stranded wire (8) is embedded and fixed in the synthetic resin material (9), the insulation coating of that portion is exposed so that a part of the core wire of the insulation coated electric wire (1) in the bent portion (2) is exposed. The coating of the electric wire (1) is cut out together with the synthetic resin material (9) to form the dot electrode (6).
[0035]
【The invention's effect】
According to the present invention, the following effects can be achieved.
[0036]
(A) even by the one of the invention described in claim 1 or 2, a long electrode of transport distance with can be easily manufactured, even if the transport distance is long, the number of wirings is directly and used By changing the diameter of the electric wire, the pitch of the electrode can be changed to match the particle size of the powder particles to be transported, and the curvature of the bent part of the electric wire and the depth of cutting out the electrode Since the area of the dot serving as the electrode changes, the transport amount can be changed.
[0037]
(B) According to the invention of claim 1, the electrode for powder transportation can be easily formed by a stranded wire, and can be lengthened in an unlimited manner in the longitudinal direction. The passage through which the powder particles pass can be configured with a free curve.
[0038]
(C) According to the invention described in claim 2 , it is possible to electrically manufacture a powder transport electrode for controlling a plurality of charged particle transport passages with a multi-value multi-phase alternating voltage of one circuit.
In addition, the shape of the powder transport electrode can be diversified.
[0039]
(D) According to the invention described in claim 3 , since the portion to be the electrode is fixed and many portions are not joined to each other, it is easy to freely change the shape of the entire powder transport electrode. Become.
[0040]
(E) According to the invention described in claim 4, the entire powder transport electrode can be made robustly in an integral structure, and a powder transport electrode that can be easily interchanged and maintained can be provided.
[0041]
(F) According to the invention described in claim 5 , the upper surface of the dot electrode is protected by forming the insulating layer for charging the powder particles on the upper surface of the dot electrode immediately after the formation of the dot electrode. Can do.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a perspective view showing a state in which a plurality of insulation-coated electric wires are wound in multiple windings on a winding core, showing work steps for explaining an execution procedure of a method of the present invention.
FIG. 2 is a perspective view showing a state before an insulation-coated wire is wound around a winding core before being rubbed with a reinforcing material.
3 is a perspective view showing a state in which an insulation-coated electric wire wound around a core is bonded together with a reinforcing material. [FIG. 4] FIG. It is a perspective view which shows the state which formed the dot-shaped electrode in the top part of the part.
FIG. 5 is a perspective view showing another implementation point of the method of the present invention and showing a state in which an insulation-coated electric wire is wound around a core different from that shown in FIG. 1 and then deformed into a U-shape.
6 is a front view of the configuration in FIG. 5 in which a dot-like electrode is formed on the top of a bent portion, as viewed in the axial direction. FIG.
FIG. 7 is a perspective view of a completed powder transport electrode, showing another way of carrying out the method of the present invention.
[Explanation of symbols]
(1) Insulated coated wire
(2) Bending part
(2a) The top of the head
(3) (3A) Core
(3a) Long side
(3b) Short side
(4) Reinforcing plate
(5) Synthetic resin material
(6) Electrode
(7) Insulating layer
(8) Stranded wire
(9) Synthetic resin material
(10) Charged particles

Claims (5)

A method for producing a powder transport electrode in an electrostatic powder transport device in which powder particles are charged and transported in a traveling wave electric field atmosphere,
A process of arranging a plurality of insulation-coated electric wires in parallel, twisting the core portions densely, and forming a twisted wire of a multi-helix structure having at least one bent portion along the axial direction ;
As partially exposed core part of the insulated wire to definitive the top portion of the bent portion of the torsion wire, scraped off the coating, electrostatic, which comprises a step of forming a dot-like electrodes A method for producing an electrode for powder transportation in a powder transportation apparatus. A method for producing a powder transport electrode in an electrostatic powder transport device in which powder particles are charged and transported in a traveling wave electric field atmosphere,
Side by side insulated wire in a plurality of parallel, after winding helically into a flat strip-shaped core made of a flexible material, together with electric wires wound around the core so as to deform the core A step of forming a bent portion along the axial direction on both sides where the electric wire in the strip-shaped core is folded and wound ;
As part of the core of the insulated wire to definitive on top of the bent portion is exposed, it scraped off the coating, electrostatic powder delivery which comprises a step of forming a dot-like electrodes A method for producing an electrode for powder transportation in an apparatus. The top portion of the bent portion, forming a dot-like electrodes, at least in bent portions, comprising the step of fixing the adjacent electric wires to each other, electrostatic powder delivery device according to claim 1 or 2, wherein Of manufacturing electrode for powder transportation in Japan. In the process of forming dot-shaped electrodes on the top of the bent part, the entire part is fixed by sandwiching both sides of the bent part with a reinforcing material, and then the top of the bent part is polished until the covering of the electric wire peels off. The manufacturing method of the electrode for powder transport in the electrostatic powder transport apparatus in any one of Claims 1-3 including the process to do. 5. The method according to claim 1, wherein the step of forming the dot-shaped electrode on the top of the bent portion includes the step of forming an insulating layer for charging the powder particles on the entire surface of the cut-out dot-shaped electrode. A method for producing an electrode for powder transportation in the electrostatic powder transportation apparatus according to claim 1.

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