JPS6345865B2 - - Google Patents

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, for a specific part (or the entire part) of the outer periphery in a cross section perpendicular to the longitudinal direction of the long object,
Continuous application is performed along the longitudinal direction of the elongated object. For example, long rubber or plastic products obtained by extrusion molding are coated with an adhesive for flocking or painted.

Hereinafter, for the sake of convenience, we will specifically explain a bead, which is a part of the upholstery of a seat used in automobiles and other vehicles, as an example of a long object.

FIG. 1 is a process diagram showing the manufacturing process of the bead.

Soft vinyl chloride is extruded from an extruder 1, and a bead material 2 having a cross-sectional shape as shown in FIG. 2 is extruded. [FIG. 2 is a cross-sectional view of the welt material 2 at the line -' in FIG. 1]. The material 2 has two webbing portions 2.
a (usually has a hollow part 2b) as the fin strip part 2c
The dimensions are, for example, the outer diameter of the groove part is 4 mm, the inner diameter of the ring part is 2 mm, and the width of the fin part is 11 mm.
It is. The extruded bead material 2 is led to a cooling tank 4 by a take-up roll 3, and is cooled and hardened with cooling water 5 or the like. The beading material 2 is dried and cooled in a drying/cooling oven 6 while traveling, and is coated with a welt portion 2a of the beading material 2 as shown in FIG. 3 by an adhesive coating device 7.
A urethane adhesive 8 is applied only to the outer surface of the bead material 2 (FIG. 3 is a cross-sectional view of the bead material 2 at the line -' in FIG. 1). Before the adhesive 8 dries and hardens, an electrostatic flocking machine 9 is used to coat the beading material 2 as shown in FIG.
The length of nylon is about 0.9mm and the thickness is 2.5mm on the ball part 2a.
A pile 10 of about denier is flocked (FIG. 4 is a cross-sectional view of the welt material 2 at the line -' in FIG. 1).

The electrostatic flocking machine 9 charges the welding material 2 with static electricity and scatters the pile 10, thereby planting the pile 10 in an upright manner on the adhesive on the outer surface of the welt portion 2a of the welding material 2. The flocked bead material 2 snakes through a drying oven 11, where the adhesive is dried and hardened and the bead material 2 is annealed, and then the material 2 is meandered through a cooling tank 12 and cooled by cold air. cooled down. The pile-flocked beading material 2 is taken up by the take-up/dividing roll 13, and its fin strips 2c are divided into wavy lines, forming two beaded edges 2A having the shape shown in FIG. , each of which is wound up by a winding roll 14 [FIG.
They are a sectional view of the bead 2A and a plan view of the bead 2A along V-V' in the figure].

Conventional adhesive applicators used in the above-mentioned bead manufacturing process include those that bring the tip of the brush into contact only with the welt portion 2a of the bead material 2 and supply a predetermined amount of adhesive to the brush, and roll coaters. method was used. However, the adhesive used here has a viscosity of, for example, 4500 to 5000 cps.
Because of this, the conventional apparatus described above cannot perform satisfactory coating. That is, it is difficult to uniformly apply the adhesive over the entire surface to be applied, and it is also difficult to apply the adhesive neatly to the boundary line between areas where it should be applied and areas where it should not be applied (i.e., There is no clear line of separation,
In addition, it is easy for the adhesive to become stringy, resulting in uneven coating, and it is also difficult to control the amount of adhesive applied.

It is an object of the present invention to provide an improved coating device that does not have the drawbacks of the conventional coating devices for long articles as described above.

The above purpose is to continuously coat a long object with a constant cross-sectional shape perpendicular to the longitudinal direction on a specific part or the entire outer periphery of the cross-section while the long object is running in the longitudinal direction. In a device for applying a coating agent, a coating agent distribution chamber into which the coating agent is introduced has a long object inlet and a long object outlet that allow the long object to run through the distribution chamber as if cut out or through the distribution chamber. The shape of the inlet and outlet is such that an appropriate clearance is provided to the coating portion on the outer periphery of the cross-sectional shape of the elongated object, and a coating agent introducing means is connected to the coating agent distribution chamber. This is achieved by the coating apparatus of the present invention, which is characterized in that:

Hereinafter, the present invention will be explained in more detail using specific examples based on the drawings. Here again, we will take the bead material as an example of a long material for convenience.

FIG. 6 is a schematic diagram of the coating device according to the present invention, and FIG. 7 is an exploded perspective view of the vicinity of the coating agent distribution chamber. The apparatus of the present invention is equipped with a coating agent distribution chamber 20. The flow chamber 20 preferably has a flat shape, and is formed between a base 21 and a lid 22 by joining them together as shown in FIG. That is,
A recess 23 having a certain depth (for example, 1 mm) is formed on the surface of the base 21 that joins the lid 22, and the surface of the lid 22 that joins the base 21 is a flat surface. In order to maintain the connection, the base portion 21 and the lid portion 22 may be screwed together at four corners. The coating agent distribution chamber 20 is provided with a long article inlet 24 and a long article so that one of the adhesive application surfaces of the beading material 2, that is, one of the webbing portions 2a, can run in a direction substantially perpendicular to the flat shape of the coating agent distribution chamber 20. A material outlet 25 is provided. The cross-sectional shape of the inlet 24 and the outlet 25 in a plane perpendicular to the running direction of the welt material 2 corresponds to the shape of the cross section perpendicular to the longitudinal direction of the welt portion 2a of the welt material 2, and the size thereof is a size with an appropriate clearance attached to the outer periphery of the cross-sectional shape of the welt portion 2a of the welt material 2. Here, the clearance is usually 0.3 to 0.4 mm, but can be determined as appropriate depending on the desired thickness of the adhesive layer, viscosity of the adhesive, etc., and may be different between the inlet 24 and the outlet 25.
Since adhesive is not applied to the fin strips 2c of the welt material 2, the long object inlet 24 and outlet 25 cut out the coating agent distribution chamber 20 only in the portion corresponding to the welt strip 2a of the welt material 2. It is. A portion corresponding to the fin strip 2c is formed as a slit 26 communicating outward. A coating agent introduction port 27 communicating into the coating agent distribution chamber 20 is formed in the lid portion 22 . The introduction port 27 is preferably opened at the end opposite to the elongated object inlet 24 and outlet 25 in the coating agent distribution chamber 20 . base 21
A mounting portion 29 for attaching to a pole 28 such as a stand is formed in the holder, and 30 is a bolt hole for tightening. A coating agent introducing means 31 is connected to the coating agent introduction port 27, and the introducing means 31 is connected to a coating agent container 33 housed in a pressurized tank 32, for example.
The pressurized tank 32 is connected to an air supply means 35 (connected to a compressor or the like) equipped with a pressure reducing valve 34.

FIG. 8 shows the lid part 21 when the coating agent inlet 27 is formed on the base 21 side, contrary to the case shown in FIG. 7.
FIG. 2 is a plan view and a longitudinal sectional view of In this specific example, a block 36 is formed within the flow chamber 20 to restrict the flow of the coating agent.

In the above specific example, the joint surfaces of the lid 22 and the base 21 are all flat, but the flow chamber 20 can also be constructed by making the joint surface of the base 21 flat and forming a recess in the lid 22. It goes without saying that the flow chamber 20 may be formed by forming a recessed portion on the joint surfaces of both the base portion 21 and the lid portion 22.

FIG. 9 is a perspective view of the vicinity of the distribution chamber in another specific example of the coating device of the present invention. In this specific example, a coating agent distribution chamber 20 is formed by processing the tip of a metal pipe into a flat shape and sealing the tip, and the tip of the distribution chamber 20 is provided with a long article inlet 24 and An outlet 25 is formed, and a slit 26 through which the fin strip 2c of the welt material 2 runs is formed in the pipe end sealing portion. Needless to say, the base of the pipe is used as the coating agent introduction port and is connected to the coating agent introduction means.

When using the coating device for long objects as described above, as shown in FIG.
5 through the welt portion 2a of the welt material 2 and run in the longitudinal direction at a constant speed, for example, 5 m/min. At the same time, the pressurized tank 3 is supplied through the air supply means 35.
A suitable pressure (for example, a gauge pressure of 0.5 to 0.7 kg/cm ² ) is applied within the coating agent introduction means 31 to introduce the adhesive into the coating agent distribution chamber 20 . The adhesive introduced into the circulation chamber 20 reaches the elongated article inlet 24 and the outlet 25, where it is applied to the welt portion 2a of the traveling welt material 2. Ball section 2a
Since there is a predetermined clearance between the elongated article outlet 25 and the elongated object outlet 25, an adhesive layer is formed on the outer surface of the webbing portion 2a exiting the outlet 25 to a thickness corresponding to the predetermined clearance. still,
It is preferable that the elongated object inlet 24 has an appropriate clearance to serve as a guide for the welt portion 2a, but since the bead material 2 is running at a predetermined speed, the coating agent may leak from the elongated object inlet 24. Because there is no
The long object inlet 24 is connected to the long object outlet 2 with respect to the beveled part 2a.
It may be formed with the same clearance as 5. still,
In Fig. 6, the adhesive is applied only to one of the welts of the bead material 2, but in the actual process, the adhesive is applied to the other weave at the same time using a similar applicator. be exposed.

According to such a coating device of the present invention, the distribution chamber 20
The adhesive introduced into the welt portion 2a of the welt material 2
Since the adhesive is applied with uniform pressure to the outer surface of the adhesive, there will be no uncoated adhesive, and the parting line is formed in a desired clear straight line at the boundary between the welt part 2a and the fin part 2c. be done. Furthermore, the thickness of the applied adhesive layer can be adjusted by changing the traveling speed of the welt material 2 or the pressure at which the adhesive is introduced.

In the above explanation, the beaded material was exemplified as a long object, but the long objects to which the device of the present invention can be applied include all long objects such as rubber weather strips and rubber glass runs used in automobiles, etc. Includes shakumono. The apparatus of the present invention also includes one for applying a coating agent to the entire outer surface of a long object. In this case, the elongate object inlet and outlet may be arranged so that the elongate object passes through the coating agent distribution chamber.
Further, the coating agent applied by the apparatus of the present invention may include paints in addition to adhesives, and the apparatus of the present invention is particularly suitable for applying high-viscosity coating agents.

[Brief explanation of the drawing]

Figure 1 is a manufacturing process diagram of the bead, and Figures 2 to 4 are -', -' and - of Figure 1, respectively.
FIG. 5 is a sectional view and a plan view of the bead material at -' in FIG. 1, FIG. 6 is a schematic diagram of the coating device of the present invention, and FIG. The figure is an exploded perspective view of the vicinity of the coating agent distribution chamber, FIG. 8 is a plan view and a vertical sectional view of the base for configuring the coating agent distribution chamber, and FIG. 9 is a perspective view of the vicinity of the coating agent distribution chamber. It is a diagram. 2: bead material, 2a: beading part, 2c: fin line part, 2A: beading part, 20: coating agent distribution chamber, 21: base, 22: lid part, 23: recessed part, 24: long object entrance, 25: Long object exit, 26: Slit, 27:
Coating agent introduction port, 31: Coating agent introduction means, 32:
Pressurized tank, 33: Coating agent container, 34: Pressure reducing valve,
35: Air supply means.

Claims (1)

[Claims] 1. To continuously apply a coating agent to a specific part or the entire part of the outer periphery of a long object whose cross section perpendicular to the longitudinal direction is constant while the long object is traveling in the longitudinal direction. In this apparatus, a long object inlet and a long object are provided to allow the long object to run through the flat plate-like coating agent distribution chamber which is cut off from outside air and into which the coating agent is introduced, as if cut out or through the distribution chamber. An outlet is provided, and the shape of the inlet and outlet is such that an appropriate clearance is provided to the coated area on the outer periphery of the cross-sectional shape of the long object,
On the other hand, a coating device for a long object, characterized in that a coating agent introducing means is connected to the coating agent distribution chamber.