JPS59130562A - Coating device for long-sized material - Google Patents

Abstract

PURPOSE:To enable coating to a uniform thickness by attaching a coating agent coating means to the top end of a coating agent supply pipe, and providing plural pieces of flexible tubes to the coating means and a brush in front of the tubes. CONSTITUTION:A coating means 4 is provided to the top end of a coating agent supply pipe 3 for supplying the coating agent from a coating agent tank 1 by a pump 2. The means 4 consists of a coating agent storage part 5 and plural pieces of flexible tubes 6 communicating with the part 5. The open top ends of the tubes 6 are arranged in one row having the shape complying with the coating part in the sectional shape of a long-sized object A. A brush 7 is provided in front of the tube 6 with respect to the traveling direction of the long-sized object.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an apparatus for applying a coating agent to the outer surface of a long object having a constant cross-sectional shape perpendicular to the longitudinal direction.

When applying adhesive, paint, or other coating agent to a long object, a specific part (or the entire part) of the outer periphery in a cross section perpendicular to the longitudinal direction of the long object is applied along the longitudinal direction of the long object. Continuous coating is performed. For example, a fixed coating device applies the coating to a predetermined portion while a long rubber or plastic material obtained by extrusion is moved in the longitudinal direction at a predetermined speed. Conventionally, such a fixed coating device has been used, for example, one consisting of a coating agent supply pipe and a groove or scraper disposed adjacent to the groove. As shown in the outline of the coating method in Fig. 1, the coating agent is continuously supplied from the tip of the coating agent supply pipe B while the long object A is traveling at a constant speed in its longitudinal direction, and then The supplied coating agent is stretched to a predetermined width and thickness by a groove C that is brought into contact with the area corresponding to the coated part of the long object A in front of the wire supply pipe B in the running direction of the long object. It is something.

However, with this type of coating method, it is extremely difficult to achieve a perfect coating, and therefore it is difficult to form a coating layer with a uniform thickness over the entire coating width, with the coating layer being thicker in the center and thinner in the periphery. A coating agent layer is easily formed. In addition, it is difficult to apply the coating agent neatly to the boundary line between the areas where it should be applied and the areas where it should not be applied (i.e., the parting line is clearly visible, there are areas where the coating agent is left uncoated), and there is smudging. occurs).

Such drawbacks are particularly noticeable when the viscosity of the coating agent is high. On the other hand, a spray coating method is sometimes applied to apply a coating agent to a long object. According to this method, the parting line clearly appears by masking, but this results in a lot of waste of coating material. In addition, with this method, when coating a long object with a highly uneven cross section, it is difficult to coat the entire coated surface with a uniform thickness.

An object of the present invention is to provide a novel coating device that improves the drawbacks of the conventional coating devices for long objects as described above.

For this purpose, a coating agent application means is attached to the tip of the coating agent supply pipe, and the application means has a plurality of thin flexible tubes that can communicate with the supply pipe.

The tip openings of the tube are arranged in a substantially continuous line, and the tube can have a shape in which the arrangement of the tip openings corresponds to the shape of the outer peripheral application portion in the cross-sectional shape of the elongated object. Further, a brush is provided in front of the tube with respect to the traveling direction of the long object, and the brush can come into contact only with the coated part of the long object.
This is achieved by the coating device of the present invention.

Hereinafter, the present invention will be explained in more detail based on the drawings.

FIG. 2 is a perspective view of the coating apparatus of the present invention, and FIG. 3 is a sectional view thereof. In the apparatus of the present invention, a coating means 4 for applying a coating agent to a long object is provided at the tip of a coating agent supplying vibrator 3 for supplying a coating agent from a coating agent tank 1 by a pump 2. The coating agent supply pipe 3 may be any conventionally used pipe as long as it can flow the coating agent at a predetermined flow rate and has a predetermined strength.

Of course, a material that is resistant to the coating agent should be used. The coating means 4 includes a coating agent reservoir 5 that communicates with the coating agent supply pipe 3 and a plurality of thin flexible tubes 6 that communicate with the reservoir 5, respectively. There are no particular restrictions on the internal volume, shape, etc. of the storage section 5, and it is provided to uniformly supply the coating agent introduced from the supply pipe 3 to all the tubes 6, and this purpose is achieved. If so, the tip of the supply pipe 3 may be branched and the flexible tube 6 may be connected directly. The storage portion 5 is made of metal or plastic, and has a predetermined strength and durability. The tube 6 is flexible and usually made of plastic or rubber. The tube 6 can be of any suitable size depending on the coating agent, coating thickness, etc., and is, for example, a polyethylene tube with an inner diameter of 1 x outer diameter of 1.5 mm.

The material of the tube 6 should be one that is resistant to the coating agent used.

The tip openings of the plurality of tubes 6 are arranged in a line, and the arrangement shape corresponds to the application area in the cross-sectional shape of the elongated object.

Adjacent tubes may be connected to each other at their outer surface contact portions.

In the apparatus of the present invention, a brush 7 is provided ahead of the tube 6 in the traveling direction of the long object A (indicated by the arrow). In the case of FIG. 2, the brush 7 is fixed to the fabric agent reservoir 5, but it may be fixed by any other suitable means. The brush 7 has a width that allows it to come into contact only with the coated portion of a long object. 8 is a support stand.

In using the coating device of the present invention as described above, first, the long object A is made to run at a constant speed in its longitudinal direction, and the tip opening of the tube 6 and the tip of the brush I are connected to the coating surface of the long object A. At the same time, the coating agent is supplied from the coating agent tank 1 through the supply pipe 3 by the pump 2, and is pushed out from the opening at the tip of each tube 6 onto the coating surface through the storage section 5. At this time, it is preferable that the tube 6 is still brought into contact with the application surface at an angle. Immediately after application, the coating agent exhibits streaks corresponding to the number of tubes (60), but the thickness is equalized by immediately sweeping it with the brush 7. In the case of FIG. 2, the arrangement of the tip openings of the tube 6 is configured from the beginning (that is, before it is brought into contact with the elongated object A) to correspond to the shape of the application part in the cross-sectional shape of the elongated object. However, the arrangement of the tip openings may not initially correspond exactly to the shape of the application portion in the cross-sectional shape of the elongated object. Since the tube 6 in the apparatus of the present invention has flexibility, when its tip opening is pressed diagonally against the coating surface, it will be arranged in a manner that follows the shape of the coating surface (i.e., the tube 6 in the present invention has flexibility). (The degree of gender is such that it can produce such an effect.)

FIG. 4 is a perspective view of the coating apparatus of the present invention used when coating the entire surface of a long article A having a circular cross-sectional shape, and FIG. 5 is a sectional view thereof. In this case, the coating agent storage section 5
has a donut shape, and flexible tubes 6 are connected to the inner surface thereof, and the openings at the ends thereof are arranged in a circular shape. Further, in this specific example, the brush 7 is provided inside the annular body 7 attached to the coating agent reservoir 5.

FIG. 6 is a perspective view of another embodiment of the apparatus of the present invention, in which there is no reservoir and a plurality of flexible tubes 6 are directly connected to the coating agent supply pipe 3.

In this way, if the coating agent is uniformly supplied from the coating agent supply pipe 3 to each of the boxes 16, the storage section may be omitted. In addition, in this specific example, the tube tip openings are not aligned in the direction perpendicular to the running direction of the long object;
In the present invention, [the arrangement of the tip openings corresponds to the shape of the applied part on the outer periphery of the visiting shape of the long object] means the shape of the applied part when projected on a curve perpendicular to the traveling direction of the long object. It shall also mean the case. When using such relatively long tubes 6, connecting and holding means 9 can be attached to predetermined locations of all the tubes 6 in order to maintain the arrangement of the distal end openings. Also,
In this specific example, the brush 7 is fixed to the coating agent supply pipe 3.

FIG. 7 is a perspective view showing a specific example of a case where two coating devices as described above are used to simultaneously coat two coated portions of the same long object. In this specific example, the storage section 5 is attached to the guide member 10 so as to be vertically movable for position adjustment and rotatable around an axis perpendicular to the attachment direction. At the intermediate position, the guide member 10 is formed with a travel guide hole 11 for the elongated object, through which the elongated object A is allowed to pass in the direction of the arrow.

According to the coating apparatus of the present invention as described above, the coating agent can be applied to a uniform thickness over the entire coating surface, and the parting line can also be clearly formed.

Also, no coating agent is wasted. Furthermore, although long objects are made to run along appropriate guides, deflection may sometimes occur. Even in such a case, in the apparatus of the present invention, since the tube 6 is flexible, it can sufficiently follow the coating surface and the coating surface can be swept uniformly, so that coating defects do not occur. Also,
According to the apparatus of the present invention, even a coating surface having a complicated cross-sectional shape can be easily coated with a uniform thickness.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a conventional long object coating method, and FIGS. 2, 4, 6, and 7 are perspective views of a long object coating apparatus of the present invention. 3 and 5 are cross-sectional views of the device of the present invention. 1: Coating agent tank, 2: Pond chisel 3: Coating agent supply vise 4: Coating means, 5: Coating agent reservoir, 6: Tube, 7: Brush 7:
Annular body 8: Support stand 9: Connection holding means 10 Guide member 11 Guide hole A: Long object. Figure 1 Figure 2 Figure 3 Figure 6 Figure 4 Figure 7

Claims (1)

[Claims] To apply a coating agent to a long object having a constant cross-sectional shape perpendicular to the longitudinal direction, on a specific part or all of the outer periphery of the cross section, while the long object is traveling in the longitudinal direction. In this apparatus, a coating agent application means is attached to the tip of the coating agent supply barb, and the coating agent is made up of a plurality of thin flexible tubes connected to the supply pipe. The distal end openings of the tube are arranged in a substantially continuous line, and the tube can have a shape in which the arrangement of the distal openings corresponds to the shape of the outer circumferential application portion in the cross-sectional shape of the elongated object, and A coating device for a long object, characterized in that a brush is provided in front of the tube with respect to the running direction of the long object, and the brush can come into contact only with a part of the long object where it is disposed.