JPS59127676A - Coater for long article - Google Patents

Abstract

PURPOSE:To apply a coating agent to uniform thickness over the entire body of a long article, by annexing an applicator means having a flexible tube and a top opened part corresponding to the shape of the workpiece to be coated at the top end of a pipe for supplying a coating agent. CONSTITUTION:A means 4 for applying a coating agent is communicated to the top end of a pipe 3 for supplying a coating agent. Said applicator means 4 has a flat flexible tube 6 and an opened part, whose shape corresponds to the sectional shape of a long article as a workpiece to be coated, at the top end of said tube 6. Hence, the tube 6 can follow the surface to be coated. Consequently, the coating agent can be easily applied to uniform thickness, even when the surface to be coated has a complicated sectional shape.

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 application is performed. For example, a fixed coating device applies the coating to a predetermined portion while a long rubber or plastic product obtained by extrusion is moved in the longitudinal direction at a predetermined speed. Conventionally, such a fixed coating device includes, for example, a coating agent supply pipe and a brush or scraper disposed adjacent to the pipe. 1C, 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. Next, the supplied coating agent is stretched to a predetermined width and thickness by a brush C that is brought into contact with a range corresponding to the coated part of the long object A in front of the supply pipe B with respect to the running direction of the long object. It is.

However, with this type of coating method, it is extremely difficult to completely spread the coating, and therefore it is difficult to form a coating layer with a uniform thickness over the entire coating width, resulting in coating that is thicker in the center and thinner in the periphery. A drug layer is likely to be formed. Also,
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., there will be a clear parting line, and there will be areas where the coating agent remains uncoated or sticks out). .

Such drawbacks are particularly noticeable when the viscosity of the coating agent is high. On the other hand, in applying a coating agent to a long object, a spray coating method is sometimes applied. 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 lubricant application means is attached to the tip of the lubricant supply pipe, and the applicator has a flat flexible tube that can be passed slowly through the aquatic supply pipe. The tube has a distal end opening in the form of a substantially continuous slit of a constant width, and the tube is characterized in that the shape of the distal opening can correspond to the shape of the outer peripheral application portion in the cross-sectional shape of the elongated object. This is achieved by the coating apparatus 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 is provided at the tip of a coating agent supply pipe 3 for supplying the coating agent from the coating agent tank 1 by the pump 2, for applying the coating agent to the long snout. There is. 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 flat collapsible tube 6 that communicates with the reservoir 5 . 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 over the entire width of the flat tube 6, and this purpose is achieved. In that case, the flexible tube 6 may be connected directly to the tip of the supply pipe 3. The storage portion 5 is made of metal or plastic, for example, and has a predetermined strength and durability. The tube 6 is flexible and usually made of plastic or rubber, and its tip opening forms a slit of a predetermined size. The tube 6 can have an appropriate degree of flatness depending on the coating agent, coating thickness, etc., and is, for example, a polyethylene tube with a slit width of about 1 wn. The tube 6 is made of a material that is resistant to the coating agent used. In order to maintain the flatness of the tube 6, connecting bodies I for connecting both side surfaces of the tube can be provided at appropriate locations.

The tube 6 may have the same degree of flatness from the connecting portion with the storage portion 5 to the tip opening, or may have a degree of flatness that gradually increases toward the tip opening. The slit shape of the opening at the tip of the tube 6 corresponds to the application area in the cross-sectional shape of the elongated 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 is lightly pressed against the coating surface of the long object A.
At the same time, the supply pipe 3 is transferred from the coating agent tank 1 to the pump 2.
The coating agent is supplied through the tube 6, passes through the reservoir 5, and is pushed out from the opening at the tip of the tube 6 onto the coating surface. On this occasion,
Preferably, the tube 6 is brought into contact with the application surface obliquely.

In the case of FIG. 2, the shape of the tip opening of the tube 6 is configured from the beginning (that is, before it comes into contact with the long object A) to correspond to the shape of the application part in the cross-sectional shape of the long object. However, the shape of the tip opening 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 device of the present invention has flexibility, when its tip opening is pressed diagonally against the coating surface, it takes on a shape corresponding to the shape of the coating surface (that is, 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, a flexible tube 6 is connected to its inner surface, and its tip opening is circular.

FIG. 6 is a perspective view of another embodiment of the apparatus of the present invention, in which there is no reservoir and a flexible tube 6 is connected directly to the coating agent supply pipe 3. In this way, when the coating agent is uniformly supplied from the coating agent supplying vibe 3 over the entire width of the tube 6, the storage section may be omitted. In addition, in this specific example, the tube tip opening is not formed in a direction perpendicular to the running direction of the long object, but in the present invention, The term "corresponding to the shape of the part" shall include the case where the shape corresponds to the shape of the coated part when projected onto a plane perpendicular to the running direction of the long object.

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 9 vertically facing each other so that it can be moved up and down for position adjustment and rotated about an axis perpendicular to the attachment surface. At the intermediate position, a long object running guide hole 10 is formed in the guide member 9, through which the long 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 surface to be coated, 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 that case, in the apparatus of the present invention, since the tube 6 is flexible, it can sufficiently follow the coating surface and no uneven coating will occur. Moreover, 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 the long object coating and fabric apparatus of the present invention. 3 and 5 are cross-sectional views of the device of the present invention. 1: Coating agent tank 2: Pump 3: Coating agent supply pipe 4: Coating means 5: Coating agent reservoir 6: Tube T: Connecting body 8: Support stand 9 guide member 1o Guide hole A: Long object Fig. 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A method for continuously applying a coating agent to a specific part or the entire part of the outer periphery of a long object having a constant cross-sectional shape perpendicular to the longitudinal direction while the long object is traveling in the longitudinal direction. In the apparatus, a coating agent application means is attached to the tip of the coating agent supply pipe, and the coating means has a flat flexible tube that communicates with the supply pipe, and an opening at the tip of the tube. The tube has a substantially continuous slit shape with a constant width, and the tube has a distal end opening that can have a shape that corresponds to the shape of the applied part on the outer periphery in the cross-sectional shape of the long tube. Coating equipment for objects.