JPH08323247A - Method for electrostatic flocking and apparatus therefor - Google Patents

Abstract

PURPOSE: To electrostatically flock the marginal part of a sheet-shaped flocking material densely and to clarify the boundary part of a masking material in multicolor flocking. CONSTITUTION: A mask 6 is arranged on a flocking surface, an auxiliary electrode 7 is set on the mask 6, and DC high voltage is applied to make polarity equal to a main electrode to neutralize the influence of the charge at the ends of fibers on a flocking surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electrostatic flocking, more particularly to flocking of a sheet-shaped flock, and more particularly to multicolor flocking.

[0002]

Problems and problems of the prior art In electrostatic flocking, short hair fibers (hereinafter simply referred to as fibers) are electrified by applying an adhesive to an object to be flocked and colliding and flocking the hair. Has been done. The principle of electrostatic flocking is that normally a positive DC high voltage is applied to a narrow mesh grid electrode with respect to an object to be transplanted, which is normally grounded, and positively charged by contact charging. The charged fibers fly by Coulomb force and gravity and collide with and adhere to the surface of the transplanted hair perpendicularly. Therefore, a dense flocked membrane can be obtained except for the edges of the flocked object. However, at the edge portion of the hair transplant, particularly when the fiber is relatively long, even if the fiber has conductivity, the electric charge of the fiber that collides with the hair transplant is not easily discharged. For this reason, the repulsive force of the tip charges of the fibers that have been flocked first acts outward from the central portion, and the fibers at the edge portions lie outward. Therefore, the edges of the sheet-shaped target to be transplanted could not be densely planted, and the fibers were wider than the required width by the length of the fiber. This was the same even when the non-implanted surface was covered with a dielectric mask. Therefore, the edge portion had to be trimmed, which caused a large loss. In addition, when performing multicolor flocking, mask each color,
Although flocking was performed, the tip charge of the fibers that had been flocked first did not discharge, and the fibers lay sideways, so a clear boundary line was not obtained.

Therefore, it is an object of the present invention to electrostatically implant hair by masking the non-implanted side edge of a sheet-shaped item to be transplanted, which allows densely planted hair to the edge of the implanted side. To provide a method of electrostatic flocking and to obtain a clear boundary line in multicolor flocking performed by masking.

[0004]

Means for Solving the Problem The means provided by the present invention for solving the problem is to cover a non-flocked surface of a transplanted object with a dielectric mask, and to charge relatively long short hair fibers with a main electrode. The electrostatic flocking is performed by disposing an auxiliary electrode on the upper surface of the mask and applying a high DC voltage having the same polarity as the main electrode to the auxiliary electrode.

[0005]

According to the above-mentioned means, the non-flocking surface of the transplanted object is covered with the dielectric mask, the auxiliary electrode formed of a thin film is arranged on the mask, and the high voltage of the same polarity as the main electrode is applied. Is applied, the electric force lines repel and neutralize the electric line of force formed by the electric charges of the fibers transplanted on the transplanted surface of the transplanted object, so that the fibers transplanted at the edge portions do not fall sideways. Therefore, when the present invention is applied to a sheet-shaped item to be transplanted, the flocked side edge portion can be densely transplanted. Further, when the present invention is used for multicolor hair transplantation, a clear boundary line can be obtained.

The details of the present invention will be described below based on examples.

EXAMPLE 1 FIG. 1 shows an example in which the present invention is used for masking the edges of a sheet-shaped to-be-planted object 4. In FIG. 1, 2 is a main electrode formed of a stainless wire mesh,
A DC high voltage, usually a positive DC high voltage, is applied by a DC power supply 41 according to a standard method. The fiber 3 is dropped by gravity from the upper part of the main electrode 2 by a fiber feeder (not shown),
When passing through the mesh of the main electrode 2, it is contact-charged and heads for the counter electrode 5 which is grounded by the Coulomb force, and collides perpendicularly with the flocking surface of the flocked object 4. The mask 6 is made of a dielectric material such as vinyl chloride, and is arranged on the edge of the transplanted object 4 in contact with the boundary line of the transplanted surface. The auxiliary electrode 7 is formed of a metal foil such as a copper wire or aluminum, but it may be coated with a conductive paint and used. The height of the mask 6 may be made substantially equal to the tip of the fiber 3, and if the distance a from the boundary line of the edge of the auxiliary electrode 7 is made substantially equal to the fiber length p, the main electrode 2
This is preferable because it does not prevent new fibers coming from from colliding with the edge of the flocked surface 4. A direct current power source 42 applies a direct current high voltage having the same polarity as the main electrode 2 to the auxiliary electrode 7. The optimum voltage to be applied to the auxiliary electrode 7 is
1/2 to 1 / of the voltage normally applied to the main electrode, which changes depending on the voltage applied to the main electrode 2 and the conductivity of the fibers or the hair transplant 4.
It should be 10. As a result, the auxiliary electrode 7 is provided at the edge portion of the object to be transplanted 4 even if the fiber flocking progresses, so that the electric charge of the fiber that is previously flocked is neutralized and the fiber does not lie outside. . That is, the hair is vertically and densely planted.

[0007]

[Embodiment 2] FIG. 2 is a plan view showing an example of implanting three color fibers of 21, 22, 23 according to the present invention.
(B) and (C) are the sectional views. In FIG. 3 (A), 6 is a mask for implanting fibers of color 21 and 7
Is an auxiliary electrode. In FIG. 3B, 9 is color 2.
2 is a mask for implanting hair, and 10 is an auxiliary electrode. Reference numeral 8 is a mask of the fibers 21 that have been previously planted.
Furthermore, in FIG. 3 (C), 11 is the color 21 that was previously planted.
And a mask for covering the fibers of color 22. Mask 6,
8, 9 and 11 are made of paper or a thin resin film and are formed to have a height substantially equal to the length of the fiber. The auxiliary electrodes 7 and 10 are formed of a metal thin film or a conductive paint. In FIG. 3, after the hair transplant object 4 coated with an adhesive is placed on the grounded counter electrode 5, (A),
Flocking is performed in the order of (B) and (C), a high DC voltage is applied to the auxiliary electrode 7 or 10, and fibers are dropped on the main electrode 2 to be flocked. If the hair is thus transplanted, the electric charges of the fibers that have been previously hair-implanted are neutralized by the auxiliary electrodes 7 or 10, and the fibers at the edge portions that have previously been hair-implanted do not lie outside. Can be clearly planted, and a clear pattern can be obtained.

[0008]

According to the present invention, the non-hair-implanted surface of the material to be transplanted 4 is masked, the auxiliary electrode is arranged on the upper surface, and the high DC voltage for making the polarity equal to that of the main electrode 2 is applied.
The tip charges of the fibers 3 that are flocked on the surface of the object to be transplanted 4 are repelled and neutralized in the central direction of the flocked hair. Therefore, the edge portion of the object to be transplanted 4 can also be densely transplanted. Therefore, in the case of a sheet-shaped to-be-planted object, it is only necessary to transplant the hair in a necessary width, trimming is not necessary, and the cost is greatly reduced. Further, in the case of multicolored flocking, when the mask provided with the auxiliary electrode according to the present invention is used, the fibers previously flocked do not lie sideways, so that a clear boundary line is obtained and the commercial value is increased.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment.

FIG. 2 is a plan view showing a second embodiment.

FIG. 3 is a sectional view showing a second embodiment.

[Explanation of symbols]

 2, main electrode 3, short hair fibers 4, hair transplant object 5, counter electrode 6, mask 7, auxiliary electrode

Claims (1)

[Claims] 1. In electrostatic flocking in which a non-flocked surface of a flocked object is covered with a dielectric mask and relatively long short-hair fibers are charged by a main electrode, an auxiliary electrode is provided on the upper surface of the mask. An electrostatic flocking method, wherein the electrostatic flocking is performed by applying a direct current high voltage which has the same polarity as the main electrode to the auxiliary electrode.