JPH105676A - Resin coating device for striatum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the coating inferiority caused by air bubbles, at a time of the coating of a wire material with a resin. SOLUTION: Upward resin flow is formed within a resin tank 4 by barrier plates 41 to remove air bubbles from an air bubble discharge pipe 43 and the nipple hole 21 of a nipple 2 is opened to the open air at a position lower than the resin level within the resin tank 4 to form the fast flow of a resin flowing in a coating area from a supply hole 51 to overflow to the outside through the nipple hole 21 and, by this constitution, air bubbles ready to adhere to the periphery of a wire material along with the resin are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for coating a striatum with a resin.

[0002]

2. Description of the Related Art In general, a coating apparatus shown in FIG. 2 is used for coating a striated body 1, for example, by coating an enamel paint on a metal wire or forming a coating on a spun optical fiber.

A nipple 102 having a generally hollow cylindrical shape and having a conical nipple hole 102A having a small diameter downward is coaxially opposed to a die 103, and the opposed generally annular area is surrounded by a resin reservoir 104. A warm water jacket 105 for heating and keeping heat is provided on the entire outer peripheral portion.
Are disposed around. In the figure, reference numeral 107 denotes the nipple 1
An adjusting screw for vertically adjusting the position of 02 and a resin supply pipe 106 for supplying the resin into the resin reservoir 104 are shown.

[0004] Resin is supplied from a resin supply pipe 106 above the resin reservoir 104 and stored therein, where the nipple 10 is supplied.
The second nipple hole 102A comes into contact with and covers the striatum 1 traveling vertically from top to bottom and is consumed. Of course, the resin level in the nipple hole 102A is the same as the resin reservoir 1.
It is almost the same as that in 04.

[0005]

As can be seen from FIG. 2, the resin for covering the striated body 1 is supplied from above and stored in the resin reservoir, and is consumed only for covering the striated body. Is done. In other words, the resin is stored quietly, so that only the amount that is attached to the running striated body 1 and taken out of the apparatus is reduced, and only that amount has a quiet flow of being replenished from the resin supply pipe 106. is there.

[0006] For this reason, the bubbles contained in the supplied resin tend to be constantly upward due to their lower specific gravity than the resin, and this portion, that is, the filament 1, tries to ascend through the nipple hole 102 A. A phenomenon occurs in which bubbles collect in the area around the. As a result, air bubbles are mixed into the resin coating, resulting in a defective coating and a resulting variation in outer diameter.

[0007]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and the solution according to the first aspect of the present invention is to prevent the resin flow upward into the tank by the baffle plate. A bubble discharge pipe is provided at the top while being forcibly formed, and a resin tank that is heated and maintained as a whole, and a nipple hole in which a linear body that is generally in a hollow cylindrical shape and to be coated with resin runs vertically, is formed, A nipple disposed so that an upper end formed as an inclined surface is opened at a position lower than the resin level in the resin tank in the outside air, and a die provided coaxially and opposed below the nipple, Resin coating on a linear body having a hollow cylindrical shape, surrounding a facing area of the nipple and the die, and having a surrounding area wall provided with a covering area cylinder having a supply hole communicating between the inside of the resin tank and the inside of the area. Device

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. Reference numeral 4 denotes a resin tank of an arbitrary shape, the inside of which is separated by a plurality of baffle plates 41 arranged in a staggered manner in a vertical direction, and a resin used for coating the striatum 1 on the upper end surface is provided. A supply resin supply pipe 42 and a bubble discharge pipe 43 (with an on-off valve) are provided.

A nipple-die assembly is mounted below the resin tank 4 on a side away from the side where the resin supply pipe 42 is mounted. This assembly comprises a generally hollow cylindrical nipple 2 having a nipple hole 21 having the same diameter in the center in the vertical direction, and a die 3 coaxially opposed to the nipple.
Are provided by a hollow cylindrical covering area tube 5, and supply holes 5 are formed in the peripheral wall of the covering area cylinder 5.
Numeral 1 serves to allow the facing coating area of the nipple-die to communicate with the inside of the above-mentioned resin tank 4 and to flow the resin therein.

It should be noted that the upper end of the nipple 2 is formed as an inclined surface 22 so that the position of the resin tank 4 in the outside air can be improved.
The opening is at a position lower than the resin level.
At a lower position where the inclined surface 22 extends, a discharge reservoir 6 provided with a discharge pipe 61 is provided so as to receive the resin that overflows from the upper end of the nipple and flows out.

The entire resin tank 4 is provided with an inlet pipe 7 below.
1. An outlet pipe 72 is provided above and is surrounded by a warm water jacket 7 through which warm water for heating and keeping heat is circulated.

Next, the operation of the device of the present invention will be described. The striated body 1 to be coated travels vertically downward in the nipple hole 21 and passes down through the hole of the die 3. The resin is continuously supplied from the supply holes 51 of the coating area tube 5 to the opposite coating areas of the nipple-die.

Considering the flow of the resin, the resin sent from the resin supply pipe 42 above the resin tank 4 is forced to flow upward by the baffle plate 41 in the tank. Is sent into the coating area while being formed. Because of this, most of the air bubbles contained in the resin before reaching the coating area are eliminated.

As described in the description of the structure, the upper end of the nipple 2 is open to the outside air lower than the resin level of the resin tank 4, so that the resin overflows through the nipple hole 21 to the outside, and the resin overflows. It travels along the surface 22 to the discharge reservoir 6. That is, there is a considerable flow of such resin. By this flow, the bubble discharge pipe 4
Air bubbles remaining without being exhausted from 3 are exhausted, so that air bubbles are prevented from being mixed into the covering of the striatum 1.

Still further, since the nipple hole 21 is a relatively small hole having the same diameter in the vertical direction, the flow velocity of the resin flowing upward through the upper end to overflow from the upper end is relatively large. Even if bubbles that happen to be entrained in the striated body 1 may adhere to the striatum, the bubbles including these bubbles can be flushed out and discharged.

[0016]

As described in detail above, according to the present invention,
Resin that comes into contact with the striated body for coating is eliminated in the resin bath by the action of the baffle plate, and residual bubbles are also entrained by the striated body due to the fast resin flow at the nipple hole. All the air bubbles are eliminated, and the resin is covered with the resin from which the air bubbles have been completely removed. Thus, there is an effect that the defective coating due to the air bubbles can be completely prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side sectional view showing a typical example of a conventional coating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Striatal body 2 Nipple 21 Nipple hole 22 Inclined surface 3 Die 4 Resin tank 41 Baffle plate 42 Resin supply pipe 43 Bubble discharge pipe 5 Covering area cylinder 51 Supply hole 6 Drain reservoir 61 Drain pipe 7 Hot water jacket 71 Inlet pipe 72 Exit tube

Claims (1)

[Claims] 1. A baffle plate (41) forcibly forms an upward resin flow in a tank, and a bubble discharge pipe (43) is provided at an upper part of the resin tank. A nipple hole (21), which is generally hollow cylindrical and in which a linear body (1) to be coated with a resin runs in a vertical direction, is formed, and an upper end formed as an inclined surface (22) is formed of the resin in the outside air. A nipple (2) arranged to be opened at a position lower than the resin level in the tank (4), a die (3) provided coaxially and opposed below the nipple (2), and a hollow cylindrical shape A wire surrounding the opposing area of the nipple and the die, and having a covering area cylinder (5) provided with a supply hole (51) on the peripheral wall for communicating between the resin tank (4) and the area. Resin coating device for strips.