JPH08337442A - Method for sticking and applying powder to filamentary body and device therefor - Google Patents

Abstract

PURPOSE: To execute work for sticking and applying powder which is capable of surely sticking and applying powder, such as talc, at all times, prevents the pollution of air by splashing of the powder into the air, in other words, is clean and high in quality. CONSTITUTION: A traveling filamentary body 101 is passed in the powder 4 electrified to the polarity reverse from the polarity of the static electricity charged on the outer peripheral surface of the filamentary body 101 and the powder 4 is stuck and applied on the outer peripheral surface of the filamentary body 101 by the static electricity force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for applying a powder to a running filament to apply powder to the filament.

[0002]

2. Description of the Related Art For example, stickiness and other troubles are prevented when an optical fiber is wound around a bobbin after a work such as secondary coating is carried out as a final step, or when the optical fiber is handled thereafter. Therefore, so-called talc powder such as magnesium silicate is attached to and applied to the optical fiber during winding and running.

As an apparatus used for attaching and applying talc as described above, for example, as shown in FIG. 3, an apparatus having a substantially box shape (hereinafter referred to as talc storage box 100) is used. It is known that a hole 100A for passing the optical fiber 101 is opened on both sides of the talc housing box 100 for passing the optical fiber 101 in the talc housed in a heap in the talc housing box 100. ing.

[0004]

By the way, in such a talc attaching / applying device, the talc piled up in the mountain shape shown in FIG. 4 (hereinafter referred to as the talc mountain 102) depends on the material used. Or, depending on the elapsed time since the completion of the talc mountain 102, etc.,
The optical fiber 101 is provided at a portion through which the optical fiber 101 passes.
Is passed, so that the tunnel-shaped hole 102A is formed. Further, in the tunnel-shaped hole 102A of the mountain 102 of talc, the peripheral portion of the hole 102A and the like are gradually destroyed due to subtle fluctuations in the passage position of the optical fiber 101, and the size of the hole 102A gradually increases. There is a tendency to expand.

Therefore, when the hole is greatly expanded, the optical fiber passing therethrough does not come into contact with the inside of the hole at all, in other words, talc is not adhered or applied at all, and the optical fiber passes and adheres. It is possible that coating unevenness occurs, which is a major problem when performing talc adhesion and coating work.

Further, the talc adhering / applying device is provided with, for example, a vibrating means such as a vibrator in a talc accommodating box, and by vibrating the talc piles by this vibrating means, the tunnel-shaped holes are destroyed at the same time. It is also known that talc is agitated by sprinkling talc on the optical fiber passing through it, but in such a configuration, a part of vibrating fine and lightweight talc is part of the talc storage box. There is also a risk of scattering from the holes to the outside.

Therefore, in view of the above-mentioned circumstances, the present invention is capable of always reliably adhering and applying powder such as talc and preventing air pollution due to scattering into the air. In other words, it is clean. It is an object of the present invention to provide a powder adhesion coating method and a powder adhesion coating device for a filament that can perform high-quality powder adhesion / coating work.

[0008]

That is, the invention described in claim 1 is a powder obtained by charging a traveling linear member with a polarity opposite to the polarity of static electricity on the outer peripheral surface of the linear member. The powder passes through the body and is adhered and applied to the outer peripheral surface of the filamentous body mainly by electrostatic force.

According to the second aspect of the invention, the first static electricity applying means for charging the outer peripheral surface of the traveling linear body with static electricity of an arbitrary polarity, and the first static electricity applying means disposed downstream of the first static electricity applying means should be applied. It has a powder accommodating box for accommodating the powder and internally agitating the powder, and a second electrostatic imparting means for charging the powder with static electricity having a polarity opposite to the polarity. .

[0010]

In the present invention, prior to the passage of the filament in the powder container, a predetermined polarity is applied to the filament in advance by an appropriate first electrostatic imparting means (the charge is applied from the beginning). If so, it is of course possible to leave it as it is), and the powder stored in the powder storage box is also always charged with static electricity having a polarity opposite to that of the filament body by the dedicated second electrostatic charging means. .

In this way, the filaments are passed through the powder contained in the powder accommodating means or in the vicinity of the powder while being applied with electric charges of opposite polarities to each other, and With this, lightweight and fine powder can be attracted and adsorbed by electrostatic force without even stirring, and the powder can be evenly applied and applied to the linear body.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram showing a powder adhesion coating device for an optical fiber according to this embodiment. The powder coating device for an optical fiber according to this embodiment is provided with a first potential applying means 1 provided in the vicinity of a traveling path of a traveling optical fiber 101 and a downstream side of the first potential applying means 1 in a conveying direction of the optical fiber 101. And a second potential applying means 3 provided in the powder containing box 2.

In the first electric potential applying means 1 of this embodiment, electric charges of a predetermined polarity are evenly and evenly applied to the outer peripheral surface of the optical fiber 101 which runs while being wound by the winding operation of the winding bobbin (not shown). In this embodiment, a corona discharge device is used to give a negative charge.

The powder container 2 is housed in a relatively shallow manner with a substantially uniform thickness so that electric charges can be easily applied uniformly. As the powder 4 housed therein, the same talc as in the conventional case is used. (See FIG. 2) is used, but it is not limited to this. The powder container 2 is also provided with a hole 2A through which the optical fiber 101, which is similar to the conventional one, passes.

The second potential applying means 3 of this embodiment is shown in FIG.
As shown in FIG. 5, the powder 4 stored in the powder storage box 2 is provided with the opposite polarity to the charge applied to the outer peripheral surface of the optical fiber 101 passing therethrough. In order to uniformly mix the powders 4 and apply static electricity, stirring means 31 composed of a rotor with blades is provided.

Therefore, according to this embodiment, the stirring means 3
The optical fiber 101 passes through the powder 4 uniformly mixed with 1 and to which a predetermined potential is uniformly applied, but the first potential applying means 1 provided on the upstream side of the powder containing box 2 Since a potential having a polarity opposite to that of the powder 4 is applied in advance by the optical fiber 101, the powder 4 in the vicinity can be evenly adsorbed evenly by the electrostatic attraction force while passing through the powder 4. In other words, since the optical fiber 101 passes through the middle of a very large number of charged powders 4 (including the case where they are floating), they can be adhered and applied with a uniform thickness.

[0017]

As described above, according to the present invention, prior to the passage of the linear body through the powder storage box, the linear body is provided with the predetermined first electrostatic imparting means in advance. Polarity is applied, and static electricity having a polarity opposite to that of the linear body is always applied to the powder contained in the powder containing box by the dedicated second electrostatic imparting means so that the powder and the powder have opposite polarities. With the electric charge applied, the filaments are made to pass through the powder contained in the powder container or in the vicinity of the powder so that light weight and fine powder can be obtained without stirring. The body is attracted / adsorbed by electrostatic force to adhere the powder evenly to the striatum.
It can be applied.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a powder coating device for an optical fiber according to the present invention.

FIG. 2 is a schematic configuration diagram showing the inside of a powder container of the apparatus.

FIG. 3 is a schematic perspective view showing a conventional powder coating device for an optical fiber.

FIG. 4 is an explanatory view showing a conventional defect.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st static electricity imparting means 2 Powder container 3 2nd static electricity imparting means 31 Stirring means 4 Powder (talc) 101 Optical fiber (striated body)

Claims (2)

[Claims] 1. A running filament (101) is passed through a powder (4) charged with a polarity opposite to the polarity of static electricity on the outer peripheral surface of the filament (101), A method for depositing and applying powder onto a wire, characterized in that the powder (4) is attached and applied to the outer peripheral surface of the filament (101) mainly by electrostatic force. 2. A first static electricity applying means (1) for charging the outer peripheral surface of a traveling linear member (101) with static electricity of an arbitrary polarity.
And a stirring means (31) disposed downstream of this for accommodating the powder (4) to be applied and agitating the powder (4) inside.
And a powder accommodating box (2) having a second electrostatic imparting means (3) for charging the powder (4) with static electricity of the opposite polarity to the above-mentioned powder. .