JPS5982972A - Coater for long-sized material - Google Patents

Abstract

PURPOSE:To coat fully an adhesive agent without causing dropout by providing a means for adjusting the flow rate of a coating agent at the center in a flow passage for the coating agent from the juncture between a flow chamber for the coating agent and a means for introducing the coating agent to the part of an inlet and outlet for a long-sized material. CONSTITUTION:The adhesive agent introduced from a vessel 33 in a pressure tank 32 into a flow chamber 20 is regulated in flow rate by a means 20' for regulating the flow of the coating agent to two split streams so that the adhesive agent is applied on a long-sized material or a beading blank material 2 which travels from an inlet 24 for a long-sized material toward an outlet 25 under the pressure uniform over the entire outside circumferential part of the bead line part 2a thereof. The adhesive agent is thus coated fully on said material without causing dropout and a distinct parting line is formed at the boundary between the part 2a and a fin line part 2c. The thickness of the adhesive agent layer is adjustable if the traveling speed of the material 2 or the introducing pressure of the adhesive agent is changed.

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 long object is Continuous coating is performed. For example, a rubber or plastic elongated article obtained by extrusion molding may be coated with adhesive for flocking or coated with paint.

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. Extruder 1
Soft vinyl chloride is extruded to form a bead material 2 having a cross-sectional shape as shown in Fig. 2 [Fig.
-n' is a sectional view of the bead material 2]. The material 2
has a shape in which two three-striped portions 2a (usually having a hollow portion 2b) are connected at the upper part of the fin 2c, and its dimensions are, for example, three-striped outer diameter 4mm, three-striped inner diameter 2mm, and fins middle 11mm. It is.

The extruded bead material 2 is led to a cooling tank 4 by a take-up 90-3 and is cooled and hardened with cooling water 5 or the like. Next, the beading material 2 is dried and cooled in a drying/cooling oven 6 while traveling, and an adhesive coating device #7 applies urethane adhesive only to the outer surface of the three-striped portion 2a of the beading material 2, as shown in FIG. The agent 8 is applied (FIG. 3 is a cross-sectional view of the welt material 2 along line II' in FIG. 1). Before the adhesive 8 dries and hardens, an electrostatic flocking machine 9 is used to apply nylon to the three-striped portion 2a of the beading material 2, as shown in FIG.
Transplant iR Ile 10 with approximately f-neel [Figure 4 is 1
It is a sectional view of the beading material 2 along IV-IV' in the figure.]
. The electrostatic flocking machine 9 charges the beading material 2 with static electricity and scatters the pile 1°, thereby planting the pile 10 in an upright manner on the adhesive on the outer surface of the three-striped portion 2a of the beading 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. It can be cooled completely. The pile-flocked beading material 2 is taken up by the taking-off/dividing roll 13, and
The fin strips 2c are divided into wavy lines to form two bead edges as shown in FIG. 5, and each of them is wound up by the winding roll 14. v-v'
FIG. 2 is a cross-sectional view of the two Beads and a plan view of the Beads 2A].

Conventional adhesive applicators used in the beading manufacturing process as described above include those in which the tip of the brush is brought into contact only with the three stripes 2a of the beading material 2 and a predetermined amount of adhesive is supplied to the brush, and the roll coater. method was used. However, the adhesive used here has a viscosity of, for example, 4
Since it is quite high at 500 to 5000 Cps, the conventional apparatus described above cannot perform satisfactory coating.

In other words, 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., it is difficult to apply adhesive evenly to the boundary line between areas where it should be applied and areas where it should not be applied). In addition, it is easy to cause adhesive stringing, resulting in uneven coating, and it is also difficult to adjust 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 for the coating portion on the outer periphery of the cross-sectional shape of the long object, and the coating agent introduction means is connected to the coating agent distribution chamber. In addition, in the coating agent distribution chamber, a long object is placed in the center of the width of the coating agent distribution path from the connecting part with the coating agent introduction means to the long object inlet and the long object outlet. This is achieved by the coating apparatus of the present invention, which is characterized in that it is provided with a coating agent flow adjusting means extending parallel to the running direction.

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 apparatus 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 distribution room 20
preferably has a flat shape, and as shown in FIG. 7, the base 21
By joining the and lid portion 22, it is formed between them. That is, a recess 23 with a certain depth (for example, 1 inch) is formed on the surface of the base 21 that joins the difference part 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 has a long material inlet 24 and a long material inlet so that the adhesive applied surface of the beading material 2, that is, one of the three striped 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 these 24 and the outlet 25 in a plane perpendicular to the running direction of the bead material 2 corresponds to the shape of the cross section perpendicular to the longitudinal direction of the three-striped portion 211 of the bead material 2, and its size The width is such that an appropriate clearance is provided to the outer periphery of the cross-sectional shape of the three-striped portion 2a of the welt material 2. Here, the clearance is usually 03~0
．． Although there are four tones, it can be determined as appropriate depending on the desired thickness of the adhesive layer, the viscosity of the adhesive, etc., and the inlet 24 and outlet 25 may be different. Since adhesive is not applied to the fin stripes 2c of the welt material 2, the only part where the long object inlet 24 and outlet 25 cut out the coating agent distribution chamber 20 is the portion corresponding to the three stripes 2aK of the welt material 2. . 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 . In the apparatus of the present invention, a coating agent distribution adjusting means 20' is provided in the coating agent distribution chamber 20.

For example, as shown in FIG. 7, this flow regulating means 20' is constructed by arranging a block on the recess 23 of the base 21 with the same height as the depth of the recess 23, and the block is positioned at the coating agent inlet 27. It is the center of the width of the coating agent distribution path from the entrance 24 to the elongated object outlet 25 (that is, the vertical width of the coating agent distribution chamber 20 in FIG. 6), and the distribution A adjustment means 20' is It extends in a direction parallel to the running direction of the object.

The base 21 has a stand etc. and a few lines to the ball 28 are part 29.
is formed and the hole 30 is a bolt hole for tightening. A coating agent introduction means 31 is connected to each coating agent introduction port 27, and the introduction means 31 is connected to a pressurized tank 32, for example.
This is a Teflon tube for guiding the adhesive from a coating agent container 33 housed in the pressurized tank 32, and an air-servry means 35 (connected to a compressor or the like) equipped with a pressure reducing valve 34 is connected to the pressurized tank 32. It is being

Figures 87 and 8 are a plan view and a cross-sectional view of the reservoir base 21 constituting the coating agent distribution chamber in another specific example of the device of the present invention, and in this specific example, the coating agent inlet 27 is formed in the base portion 215ill. has been done.

FIGS. 9 and 10 are partial plan views of the base 21 to show specific examples of other shapes of the coating agent distribution chamber 20 and coating agent distribution adjusting means 20' in the apparatus of the present invention.

In the above specific example, the joint surfaces of the lid 220 and the base 21 are all flat, but it is also possible to make the flow chamber 2° by making the joint surface of the base 21 flat and forming a recess in the lid 22. The base s21 and the lid part 22 may also be configured.
By forming four parts on both joint surfaces of the flow chamber 2o
Of course, it is also possible to configure .

When using the coating device for long objects as described above, as shown in FIG. to run in the longitudinal direction. At the same time, an appropriate pressure (for example, 0.5~
A gauge pressure of 0.7 kg/cfI is applied to introduce the adhesive from the coating agent introduction means 31 into the coating agent distribution chamber 2o. The adhesive introduced into the distribution chamber 2o is once divided into two streams by the coating agent distribution adjustment means 20', and then arrives at the long object inlet 24 and outlet 25, where the running bead material It is applied to the outer surface of the three-striped portion 2a of No.2. Since the three-striped portion 2a and the long article outlet 25 have a predetermined clearance, an adhesive layer is formed on the outer surface of the three-striped portion 2a exiting the outlet 25 to a thickness corresponding to the clearance. It is preferable that the entrance 24 for the long object has an appropriate clearance so as to act as a guide with respect to the three-striped portion 2a. Therefore, the long object inlet 24 may be formed with the same clearance as the long object outlet 25 with respect to the three-striped portion 2a. In Fig. 6, adhesive is applied only to one of the three stripes of the beading material 2, but in the actual process, adhesive is applied to the other three stripes at the same time using a 1 m long coating device. Coating is done.

According to the coating apparatus of the present invention, the adhesive introduced into the distribution chamber 20 is adjusted in flow rate by the coating agent distribution adjusting means 20' (i.e., the adhesive introduced into the distribution chamber 20 is transferred to a long object from the coating agent inlet 27). In the distribution path M of the coating material leading to the inlet 24 and the outlet 25, there is a tendency for a large amount of adhesive to flow near the center of the width, so once this flow is blocked, the flow is substantially uniform again. Since the pressure is applied uniformly to the entire outer surface of the three-striped portion 2a of the beading material 2, there will be no adhesive residue, and the parting line The three-striped portion 2a and the fin-striped portion 2c are drawn in a clear straight line.
It is formed at the boundary between

However, it is also possible to adjust the thickness of the applied adhesive layer by changing the traveling speed of the beading 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 present invention can be applied include all kinds of long objects such as rubber user strips and comb glass runs used in automobiles, etc. Contains long items. 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, long item 7! /i The elongated object inlet and outlet may be arranged so as to pass through the coating agent distribution chamber. Furthermore, 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 cross-sectional views of the bead material at B-11', ■-1', and IV-IV' in Figure 1, respectively. Figure 5 shows v-v in Figure 1.
6 is a schematic configuration diagram of the coating device of the present invention, FIG. 7 is an exploded perspective view of the vicinity of the coating agent distribution chamber, and FIG. The figures are a plan view and a cross-sectional view of the base of the reservoir constituting the coating agent distribution chamber.
Figures 1 and 10 are partial plan views of the base for configuring the coating agent distribution chamber. 2... Beading material 2a... Three-striped portion 2c... Fin-striped portion 2A... Beaded edge 20... Coating agent distribution chamber 2
0'... Coating agent distribution adjustment means 21... Base
22... Lid part 23... Recessed part 24...
Long object inlet 25...Long object outlet 26...Slit 27...Coating agent introduction port 31...Coating agent introduction means 32...Pressure tank 33...Coating agent container 34
... Pressure reducing valve 35 ... Air supply means No. 6
Figure 7 Figure 457- Figure 8 Figure 9 10

Claims (1)

[Claims] For continuously applying a coating agent to a specific part or all 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 distribution chamber into which the coating agent is introduced is provided with a long article inlet and a long article outlet that allow the long article to run as if cutting out or penetrating 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 on the other hand, means for introducing the coating agent is connected to the coating agent distribution chamber, Further, in the coating agent distribution chamber, a coating agent distribution path extending from the connection part with the coating agent introduction means to the long article inlet and long article outlet sections extends parallel to the traveling direction of the long article. A coating device for long objects, characterized in that a coating agent distribution adjustment means is provided.