JPS629953Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to electrostatic flocking and electrostatic coating technology, and more specifically, to a device that allows fiber piles or powder coatings to fall uniformly onto a three-phase electric field panel and coat them uniformly on the adherend. This is related.

The principles of electrostatic flocking and electrostatic coating, which use three-phase or single-phase alternating current voltage to move fiber piles, powder coatings, etc., are already widely known. For example, when applying powder coatings, it is generally A powder coating gun is used. However, if the base material (substrate) has a concave shape, it is difficult to coat the entire surface with a uniform thickness. Some degree of variation in film thickness distribution cannot be avoided.

In addition, the pile for electrostatic flocking, in which the fibers are cut into small pieces, is passed through a number of gaps between electrodes installed above the adherend, and the charged fiber pile and powder paint are sprayed and dropped onto the adherend. If the hair is transplanted using the adsorption method, excessive pile is often transplanted and spoils the appearance of the product.

On the other hand, when flocking using the up method, in which the fiber piles or powder paint sprinkled on the top surface of the electric field panel installed below the adherend are raised and adsorbed to the adherend, the piles are evenly spread over the electrode. After that, voltage is applied and the hair is transplanted. However, if the hair needs to be transplanted continuously, the pile must be evenly spread over the electrode after each hair transplanting process.
This method not only requires complicated operations but also has the disadvantage that the quality of the product is unstable.

The present invention eliminates the conventional drawbacks as mentioned above,
An object of the present invention is to provide an electrostatic device capable of uniformly dispersing fiber piles or powder paint by vibrating or rotating a gutter-shaped or tubular dispersing device.

The electrostatic device according to the present invention includes an electric field panel formed by embedding a plurality of opposing electrodes in a thin plate made of an insulating material or a semiconductor and placed opposite to an adherend, and a gutter-shaped gutter placed above an edge of the electric field panel. or an electrostatic device comprising a tubular spreader, in which a three-phase AC voltage and a DC high voltage are superimposed and applied to the opposing electrode of the electric field panel, and the length of the main body of the spreader is The length corresponds to the width of the edge of the electric field panel, and the bottom of the main body is provided with a plurality of openings that gradually become larger from one end to the other, and the side with the smaller opening is lifted upward as the pile input end. tilting the sprayer and holding the main body so as to be able to vibrate or rotate, whereby the fiber pile or powder coating or the like is uniformly spread and fallen onto the electric field panel,
It is then transferred to the downstream side over the electric field panel, and is uniformly and continuously deposited on the adherend which is placed opposite to the electric field panel and is grounded.

The fiber pile, powder coating, etc. are transported downstream on the electric field panel by the action of the traveling wave AC electric field generated by the three-phase AC voltage.

The opening provided in the bottom of the spreader can be a rectangular hole drilled in a flat plate or a mesh hole in a sieve.

In one embodiment of the present invention, surplus piles, powder, etc. can be collected and returned to the supply device for use in the coating process.

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment in which the present invention is applied to an electrostatic device for planting piles 20 on the inner surface of an arc-shaped flocking object 10.

In FIG. 1, a pile 20 (for example, 1 mm in length and 3 denier in thickness) made of nylon fiber pieces is housed in a pile feeder 11. As the pile feeder, for example, a Micro Feeder MF model manufactured by Sankyo Dengyo Co., Ltd. can be used. pile 20
is introduced into the cylindrical transport tube 12 shown in FIG. 7, on the inside of which a printed board (flexible print) 28 is pasted with epoxy resin to form an annular electrode. The printed board 28 is flexible and is formed by laminating or embedding circular or foil-shaped linear electrodes made of copper, nichrome, stainless steel, etc. on a thin plate made of polyimide, polyester, etc., which are insulators or semiconductors.

As shown in FIG. 7, a three-phase AC voltage from the three-phase AC voltage generator 13 is applied to the printed board 28, and a traveling wave AC electric field generated by the three-phase AC voltage applied to the annular electrode is generated. By this action, the charged pile 20 can be automatically transferred toward the outlet of the transport pipe 12.

The pile 20 leaving the transport pipe 12 is sent onto a trough-like spreader 30. The bottom of the sprayer 30 has a plurality of openings P (second
(see Figures P ₁ to _{P 9} ), and the side of the small opening P ₁ is lifted upward and inclined as the pile input end side. This inclination angle a is, for example, about 5°.
As shown in FIG. 2, the sprayer 30 is provided with nine rectangular holes P ₁ to _{P 9} at a pitch of, for example, 50 mm.

The spreader 30 is held so that it can vibrate up and down by electromagnetic vibration, and the pile 2 placed on the spreader
0 moves downstream due to vibration and inclination, passes through the hole in the bottom, and falls onto the electric field panel 17 below. By appropriately selecting the size of each hole, approximately 1/10 of the supplied pile can be dropped from each hole. Approximately 1/10 of the excess pile that did not fall into any of the holes can be collected from the lowest end of the spreader into a collection container (not shown) and returned to the feeder 11.

FIG. 3 shows a rotating sieve type disperser 40 having the same function as the vibration disperser 30 as another embodiment of the disperser.
It represents. This distributor 40 is provided with five sieves 41 to 45, and the mesh of the sieves becomes wider in the downstream direction of the arrow, and is installed at an angle b of, for example, 5 degrees with respect to the horizontal. ing. For example, the mesh size of the sieve is 41 to 400.
By setting 42 to 325 meshes, 43 to 250 meshes, 44 to 200 meshes, and 45 to 150 meshes, the supplied pile 20 will fall approximately evenly at each sieve section. Excess piles can be collected in the collecting section 48 and then returned to the feeder 11 again.

In FIG. 1, a three-phase AC voltage 14 and a DC voltage 15 are applied to the electric field panel 17 in a superimposed manner, and the applied voltages are +30KV DC and 4KV AC.
The length of the main body of the spreader 30, 40 is the electric field panel 17.
The length corresponds to the width of the edge of the electric field panel 1.
7. Make sure the pile falls evenly onto the required area. The pile that has fallen onto the front edge 33 (FIG. 4) of the electric field panel 17 is moved over the electric field panel to the main body 34 on the downstream side by the action of the traveling wave AC electric field generated by the three-phase AC voltage. transported towards.

The shape of the main body 34 of the electric field panel 17 is formed so as to face the flocked object 10 along the shape of the flocked object 10, so that there is no space between the main body 34 and the flocked object 10 which is grounded via the conveyor rail 36 and the hanging device. This induces an electrostatic effect, and the piles on the electric field panel rush toward the inside of the object to be flocked, where they are flocked using adhesive.

Once a certain amount of pile has been applied to the body to be transplanted, no more will adhere, so the flocking is carried out sequentially from the upstream side until the downstream side is completed, and the excess pile is collected in the collection hopper 19 and further It is transported to the pile feeder 11 through the cable 38.

In the above example, the pile is a nylon flocking pile with a length of 1 mm and a thickness of 3 denier, a pile supply rate of 300 g/min, a conveyor speed of 1 m/sec, and a flocked body of 1.4 m in width, 1 m in length, and 0.4 m in depth. When applied as a molded ceiling for an automobile, a uniform flocked product of 110 g/m ² was obtained.

FIG. 4 shows an example of the structure of the electrostatic plate of the electric field panel 17, which is made by laminating a printed board on which nichrome wires with a diameter of 0.3 mm are embedded at parallel intervals of 5 mm on a plastic substrate 25. .

Figure 5 shows the details of the electrostatic plate mentioned above.
A printed board (flexible print) formed by embedding nichrome wire 23 in polyimide is bonded onto a plastic substrate 25. The printed board is formed by suitably bending a planar board according to a developed shape.

FIG. 6 shows an example of an arrangement method of linear electrodes 23 for applying a three-phase AC voltage, in which every second parallel linear electrode 23 is connected in the same phase, A,
A three-phase AC voltage 14 and a DC voltage 15 are applied to each phase of B and C.

FIG. 7 shows an enlarged view of a state in which three-phase AC voltage from the three-phase AC voltage generator 13 is applied to the printed board 28 attached to the inside of the cylindrical transport pipe 12.

As explained in detail above, according to the electrostatic device of the present invention, the fiber pile and powder coating are continuously and evenly distributed on the electric field panel, and the coating process is executed while further transferring it to the downstream side. As a result, the fiber pile is evenly adsorbed to the grafted body, resulting in a flocked product with a uniformly flocked appearance and excellent quality.In addition, unlike conventional methods, it is possible to collect a large amount of pile at once. This has excellent effects such as eliminating the need for recovery equipment.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the electrostatic device based on the present invention, Fig. 2 is a plan view showing the arrangement of the openings of the gutter-like spreader, Fig. 3 is a perspective view of the tubular spreader, and Fig. 4 is a perspective view of the electrostatic device according to the present invention. A perspective view of the electric field panel, Figure 5 is taken from V-V in Figure 4.
6 is a perspective view showing an arrangement of linear electrodes, and FIG. 7 is a longitudinal sectional view of a tubular transport pipe. 10... Hair transplanted body, 12... Transport pipe, 13,1
4...Three-phase AC generator, 15...DC generator, 1
7... Electric field panel, 20... Pile, 23... Electrode, 25... Plastic substrate, 27... Epoxy resin, 28... Printed board, 30, 40... Spreader.

Claims (1)

[Claims for Utility Model Registration] 1. An electric field panel formed by embedding a plurality of counter electrodes in a thin plate made of an insulating material or a semiconductor and arranged to face an adherend, and a gutter-shaped panel arranged above near the edge of the electric field panel. or a tubular spreader, wherein a three-phase AC voltage and a DC high voltage are superimposed and applied to the opposing electrode of the electric field panel, and the length of the main body of the spreader is The length corresponds to the width of the edge of the electric field panel, and the bottom of the main body is provided with a plurality of openings that gradually become larger from one end to the other, and the side with the smaller opening is lifted upward as the pile input end. The sprayer is tilted and the main body is vibrated or rotatably held, so that fiber piles or powder coatings, etc. are uniformly spread and dropped onto the electric field panel, and then transferred onto the electric field panel to the downstream side. . An electrostatic device, characterized in that it is uniformly and continuously deposited on an adherend that is placed opposite to the electric field panel and is grounded. 2. The electrostatic device according to claim 1, wherein the opening is a rectangular hole bored in a flat plate. 3. The electrostatic device according to claim 1, wherein the opening is a mesh hole of a sieve.