JPS632136Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a device for applying paint to a long body.
More specifically, it relates to a device for uniformly applying paint to the surface of long objects such as electric wires and pipes.

Prior Art Conventionally, when attempting to continuously apply paint to the surface of a long body such as an electric wire, the long body is dipped into a paint container and passed through it, and then the paint is applied using a paint application die, cloth, felt, etc. A method of adjusting the coating film thickness on the surface of a long body by removing excess paint is often used.

However, conventional paint application dies are made of rigid materials such as metals and are designed to scrape off excess paint, but since the hole diameter is constant, any change in the outer diameter of a long object can be quickly removed. This can affect the coating thickness, and if dust gets caught, it can cause streaks on the coating, or in extreme cases, it can get stuck in the gap between the long body and the die, damaging the long body. Ta. In addition, paint film unevenness may occur due to vibrations etc. when the long object passes, or paint may accumulate near the inlet or outlet of the die and solidify, causing the same behavior as dust. Furthermore, when replacing the long body or processing after wire breakage, it is necessary to reinsert the long body into the die hole, and when changing the paint, the equipment must be stopped for die replacement and cleaning. It has the disadvantage of being extremely inefficient.

On the other hand, in the method of wiping off excess paint using cloth, felt, etc., a material that easily adapts to the surface of the long object is used, but it has the disadvantage that it is difficult to adjust the coating thickness because it is easily abraded. . In addition, during use, the surface of cloth or felt that comes into contact with the long object becomes dense and the paint retention function decreases, so there is a risk of partial insufficient coating on the long object due to insufficient immersion in the paint container. There are also drawbacks such as when the frictional force between the elongated body and the elongated body rapidly increases, resulting in damage to the elongated body. Furthermore, when replacing the long body or changing the paint, it is necessary to wrap and unwrap cloth or felt around the long body, which requires the equipment to stop operating.
As with using dice, it is extremely inefficient.

Problems to be Solved The present invention is a paint application method that can form a uniform coating film on the surface of a long body over a long period of time, and that can efficiently replace the long body or paint. The aim is to provide equipment.

Means for Solving Problems The object of the present invention as described above is to provide a coating die that can be divided into a plurality of parts by a dividing surface in the longitudinal direction, and a die that can support the plurality of parts and move them toward and away from each other in conjunction with each other. This can be achieved by configuring an apparatus for applying paint to an elongated object by providing a plurality of sets of coating heads each having an opening/closing means so as to be movable in a direction intersecting the travel path of the elongated object.

Furthermore, the coating die used in the apparatus configured as described above is provided with a hollow portion through which the elongated body passes,
The outlet side of the elongate body of the hollow part is formed into a funnel-shaped hollow part, and the hollow part is partitioned through a push ring that is slidable within the hollow part, and the hollow part on the side of the funnel-shaped hollow part is defined. A fiber web having elasticity and abrasion resistance is loaded, and a sliding means for the push ring is attached to the entrance side of the elongated body in the hollow portion, so that the elongated body comes into contact with and penetrates the fiber web. It is characterized by the following.

Embodiment FIG. 1 is a perspective view showing an example of the apparatus for applying paint to a long body according to the present invention, FIG. 2 is a perspective view of its coating die portion, and FIG. 3 is a longitudinal sectional view thereof.

In the figure, reference numeral 1 denotes a coating die, which is a cylindrical body with a rectangular external appearance placed horizontally, and is divided into two upper and lower parts 1a and 1b. 2a and 2b are die supports to which the respective die parts 1a and 1b are detachably attached, and are slid on the guide 3a of the stand 3 so that they can be opened and closed up and down in conjunction with each other by a rack and pinion mechanism. movably mounted. 4 is a pedestal on which the stand 3 is slidably mounted, and a long body such as an electric wire a
The stand 3 is provided so that it can be moved laterally with respect to the running path. Here, A indicates a coating head that is ready for coating by surrounding the electric wire a from above and below with coating dies 1, and B indicates a coating head that is in standby mode with the coating dies opened and retreated.

The coating die 1 is configured to have a substantially cylindrical internal space 5 around the elongated body a,
The entrance of the internal space 5, that is, the entrance side of the elongated body a, is open, but the exit side is narrowed to form a funnel-shaped space 6. A metal fiber web 8 having elasticity and wear resistance is filled at the rear of the internal space 5, that is, on the side of the funnel-shaped space 6, and then a push ring 7 is fitted therein. 9 is a through hole for the elongated body a. Coating die 1 configured in this way
is assembled from an upper part 1a and a lower part 1b, and includes a fiber web 8 and a push ring 7.
is also assembled from respective upper parts 8a and 7a and lower parts 8b and 7b. 10a and 10b are holding members for preventing the fiber web and the push ring from falling off from the upper side 5a and lower side 5b of the internal space when the coating die is separated into the upper part 1a and the lower part 1b. .

11 is a cylindrical body into which the push ring 7 is pushed, and a through hole 12 that serves as a passage for the elongated body a is provided in the center.
A slit 13 for inserting the elongated body a is provided. Further, a projection 14 is formed on a part of the outer wall. Reference numeral 15 denotes an air cylinder for pressing the cylindrical body 11, and is configured so that the tip of a cylinder rod 16 can come into contact with the protrusion 14. Further, the protrusion 14 is fitted into a groove 17 provided in the inner wall of the die portion 1b so as to be able to slide back and forth. 18 is for urging the cylindrical body 11 forward against the pressing force of the air cylinder 15.
This is a spring inserted into the groove 17.

Note that 19 is a through hole leading from the funnel-shaped space 6 to the outer wall surface of the die, and is for collecting excess paint and the like.

The fiber web to be filled in the internal space 5 of the coating die 1 is made of a fine wire made of stainless steel fiber, copper alloy fiber, etc. with an outer diameter of several tens of microns or less, preferably 20 microns or less, which is highly elastic and wear-resistant and has an appropriate length. The long body a is cut into strips, formed into a mat shape using a fiber opening machine, etc., and laminated or rolled as appropriate to form a shape that allows the elongated body a to be held between the top and bottom, as shown in Figure 4 a, b or c. This is what I did. Such a fiber web 8 has sufficient elasticity and conforms well to the outer surface of the elongated body a, while preventing the voids from being collapsed due to sagging, and can contain a large amount of paint. be.

When applying paint to a long object, such as an electric wire, using the device of the present invention configured as described above, the coating die 1 is opened and the coating head filled with a clean fiber web 8 is opened. Prepare as shown in B in Figure 1. Next, move the coating head to the traveling position of the long body a, and then move the coating die 1 from above and below.
together to sandwich the elongated body a (state A).

The elongated body a whose surface has been temporarily coated with paint by means such as dipping in a previous step (not shown) enters the coating die 1 from the entrance side (left side in the figure) and passes through the cylindrical body 11. It passes through the hole 12 and comes into contact with the fiber web 8 through the through hole 9, and is drawn out from the rear exit side of the coating die, leaving the excess paint in the void of the fiber web 8. At this time, when the cylinder 11 is press-fitted into the coating die 1 using the air cylinder 15, the push ring 7 compresses the fiber web 8 toward the exit side, but due to the inner wall of the funnel-shaped space 6, the fiber web 8 is also compressed toward the elongated body a located at the axial center, and in particular, the voids on the exit side of the fiber web 8 are reduced. On the other hand, when the pressure of the air cylinder 15 is lowered, the cylinder 11 returns to the front by the spring 18, so that the fiber web 8 expands due to its own elasticity and the gap increases. In this way, the air cylinder 15
By adjusting the pressing force, the contact pressure of the fiber web 8 to the elongated body a and the amount of voids can be increased or decreased, thereby adjusting the coating film thickness on the surface of the elongated body a. At this time, the excess paint absorbed by the fiber web 8 smooths out the excess or deficiency of the paint applied to the elongated body a, eliminating uneven coating, and the dust etc. in the paint is captured by the fiber web 8. As a result, a uniform coating film with no defects can always be obtained.

Furthermore, when excessive paint accumulates in the fiber web 8, the excess paint can be recovered via the through holes 19.

Effects of the invention Since the apparatus for applying paint to a long body according to the present invention is configured as described above, it is possible to replace the coating head even while continuously applying paint to a long body. Moreover, it is possible to form a uniform coating film without defects over a long period of time. Furthermore, when changing the paint or the length of the long body, the changeover can be made quickly without requiring any extra work, and high efficiency operation is possible, making it a highly productive and economical device.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a paint coating device for a long body according to the present invention, Fig. 2 is a perspective view of a coating die portion, and Fig. 3 is a perspective view of a coating die part.
The figures are also longitudinal sectional views, Figures 4 a, b and c.
2A and 2B are perspective views showing examples of the shapes of fiber webs, respectively.

Claims (1)

[Claims for Utility Model Registration] 1. A coating head having a coating die that can be divided into a plurality of parts by a dividing surface in the length direction, and a die opening/closing means that can support the plurality of parts and move them toward and away from each other in conjunction with each other. A plurality of sets are provided so as to be movable in directions intersecting the running path of the elongated body, and a fiber web having elasticity and abrasion resistance is disposed within the coating die. Equipment for applying paint to the body. 2. The coating die is provided with a hollow part through which the elongated body passes, and the outlet side of the elongated body of the hollow part is formed into a funnel-shaped hollow part, and the hollow part is provided with a push ring that can freely slide within the hollow part. a fiber web having elasticity and abrasion resistance is loaded into the hollow part on the side of the funnel-shaped hollow part, and a sliding means of the push ring is attached to the entrance side of the elongated body in the hollow part. 2. The device according to claim 1, wherein the elongated body contacts and penetrates the fiber web.