JPS5980352A - Coater for long body - Google Patents

Abstract

PURPOSE:To enable to uniformly apply a coating agent onto the outer surface of a long body, by providing an inlet and an outlet for the long body at a coating agent-distributing chamber into which a coating agent is introduced, and forming divided distributing chambers divided by a partition body in said coating agent- distributing chamber. CONSTITUTION:An inlet 24 and an outlet 25 for a long body which enables the running of a long body 2 are provided at a coating agent-distributing chamber 20 into which a coating agent is introduced, in such a manner that said inlet and outlet openings is notched or pierced through the chamber 20. The shapes of the inlet 24 and the outlet 25 are those which provide an outer coating part in the sectional configuration of the long body 2 with proper clearance. In addition, the chamber 20 is divided into several parts by one or more partition bodies 20' having partition surfaces substantially extending along the running direction of the long body 2 to a position in the vicinity of a space linking the inlet 24 and the outlet 25, to form divided distributing chambers 20a, 20b, and a separately independent means 31 for introducing a coating agent is connected to the chamber 20a, 20b.

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, 1 part of the outer periphery in a cross section perpendicular to the longitudinal direction of the long object.
The timed portion (or the entire portion) is continuously coated along the longitudinal direction of the long object. For example, a rubber or plastic elongated article obtained by extrusion molding is 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. Extruder 1
A softer vinyl chloride is extruded to form a bead material 2 having a cross-sectional shape as shown in Fig. 2 [Fig.
It is a cross-sectional view of the beading material 2 along r-rt']. The material 2 has a shape in which two three-striped sections 2a (usually having a hollow section 2b) are connected by a fin section 2c, and its dimensions are, for example, three-striped outer diameter 4 mm, ball section inner diameter 2 mm, There is 11mmf in the fin strip. The extruded beading material 2 is led to a cooling tank 4 by a take-up roll 3, where it is cooled and hardened with cooling water 5, etc. 6, and then the beading material 2 is dried and cooled in a drying/cooling oven 6 while running. As shown in FIG. 3, the adhesive applicator 7 applies the urethane adhesive 8 only to the outer surface of the three-striped portion 2a of the welt material 2. It is a sectional view of the beading material 2].

Before the adhesive 8 dries and hardens, a pile of nylon with a length of 0.9 in g and a thickness of about 25 denier is applied to the three-striped portion 2a of the beading material 2 as shown in FIG. 4 using an electrostatic flocking machine 9. 1o
(FIG. 4 is a cross-sectional view of the welt material 2 along the line rv-rv' in FIG. 1). Electrostatic flocking machine 9 is welding material 2
The pile 10 is charged with static electricity and scattered, and the pile 10 is planted in an upright manner on the adhesive of the three-striped part 2a of the outer jacket of the welt material 2. The flocked welt material 2 snakes through a drying oven 11, where the desiccant is dried and hardened, and the welt material 2 is
Annealing is performed, and then the material 2 is placed in a cooling tank 12.
It is cooled by cold air as it snakes around inside.

The pile-flocked beading material 2 is taken up by the take-up/dividing roll 13, and its fins 2c are divided into wavy line shapes, and the beading material 2A having a shape as shown in FIG.
Each of the book-formed pieces is wound up by a take-up roll 14 (FIG. 5 is a sectional view of the two beads and a plan view of the two beads along the line v-v' in FIG. 1).

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 the speed is quite high at 500 to 5000 cps, it is not possible to perform satisfactory coating using the conventional apparatus as described above. That is, it is difficult to uniformly apply the adhesive over all 11 lines of the application surface, and it is also difficult to apply the adhesive 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, the adhesive is left uncoated, and smudges appear), and the adhesive tends to become stringy, resulting in uneven coating. Have difficulty.

SUMMARY OF THE INVENTION 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.

Hereinafter, the purpose of (a) is to apply a method to a long object whose cross section perpendicular to the longitudinal direction has a constant shape, to a specific part or all of the outer periphery of the cross section, while making the long object run in the longitudinal direction. In an apparatus for continuously applying a coating agent, the population and length of a long object is such that the long object can be run through the distribution chamber into which the coating agent is introduced, as if cutting out or penetrating the distribution chamber. The outlet is provided with an appropriate clear rasp on the outer periphery of the cross-sectional shape of the object. is divided into a plurality of parts by one or more partitions having partition surfaces essentially in the running direction of the long object and extending to the vicinity of the space connecting the long object and the long object exit. This is achieved by the coating apparatus of the present invention, which is characterized in that a distribution chamber is formed, and each of the 16 chambers is connected to an independent means for introducing a reparative agent.

Hereinafter, the present invention will be explained in more detail with reference to specific examples with reference to 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 distribution room 20
preferably has a flat shape, and as shown in FIG. 7, the base 21
and the lid part 22 are joined together to form a flow chamber 20 therebetween, and the flow chamber 20 is divided by a partition body 20'.
Thereby, two divided circulation chambers 20a and 20b are formed. That is, two recesses 23 and a partition 20' of a certain depth (for example, 1 mm) are formed at the joint between the base 21 and the lid 22, and the joint surface of the lid 22 with the base 21 is formed with a partition 20'. It is flat. In order to maintain the connection, the base 21 and the lid 22 are screwed together at four corners with a deviation j1τ. Coating agent distribution room 2
0 has a bead material 2 in a direction substantially perpendicular to its flat shape.
A long article outlet 24 and a long article outlet 25 are provided so that 10,000 of the adhesive coated surface, that is, the three stripes 2a can run. In a plane perpendicular to the running direction of the beading material 20, the cross-sectional shapes of these openings 24 and exits 25 correspond to the shape of the cross-section perpendicular to the longitudinal direction of the three-striped portion 2a of the beading material 2, 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 to 04 songs, but may be different between the entrance 24 and the exit 25 depending on the desired thickness of the adhesive layer, viscosity of the dressing, etc. Since adhesive is not applied to the fin strips 2C of the welt material 2, the long object 24 and outlet 25 cut out the coating agent distribution chamber 20 only in the portion corresponding to the three stripes 2a of the welt material 2. be. The part corresponding to the fin strip 2C is a slit 2 that communicates with the outside.
6. The partition body 20' extends in the vicinity of the long object inlet 24 and the long object outlet 25 at 1 and 2.
The two divided flow chambers 20a and 20b communicate only in this portion. Furthermore, the partition body 20' is essentially a partition surface in the running direction of the long object to prevent the adhesive from flowing between the divided circulation chambers. Two coating agent introduction ports 27 are formed in the lid portion 22 and communicate with each other into the divided distribution chambers 20a and 2Ob. Each divided distribution room 20a
It is preferable that the introduction port 27 opens at the end of the elongated object 24 and the outlet 25 in the elongated object 24 and the outlet 25. The base 21 is formed with a portion 29 for attaching to a ball 28 such as a stand, and 30 is a bolt hole for tightening. A coating agent introducing means 31 is connected to each coating agent inlet 27, and the introducing means 31 is, for example, a Teflon tube for guiding the adhesive from a coating agent container 33 housed in a pressure cooker 32. , the pressurization/
Air supply means 35 (
(connected to a compressor, etc.) is connected.

Figure 8 is a plan view of the base 21 for configuring the coating agent distribution chamber in another embodiment of the apparatus of the present invention, and a sectional view along the line -■'. In this specific example, in order to more smoothly distribute the coating agent to the long article inlet 24 and outlet 25 portion, each divided distribution chamber 20 & 20b is formed thinner on the long article inlet 24 and outlet 25 side. . That is, base 2
The first recess 23 is provided with a protrusion 36 having a depth approximately half that of the recess 23 .

Hereinafter, in the specific example of -A, the joints of the lid part 22 and the base part 21 are all flat, but in other cases, by making the joints of the base 21 flat and forming a recess in the lid part 22, the flow chamber can be formed. It goes without saying that the flow chamber 20 may be constructed by forming a concave portion on the joint surface of both the base portion 21 and the lid portion 22. -Also,
The coating agent inlet 27 may be provided on the base side.

FIG. 9 is a plan view of the base 21 of the reservoir constituting the circulation chamber in another specific example of the coating equipment of the present invention. In this specific example, three recesses 23 are formed so that the flow chamber 20 is divided into three divided flow chambers by two partitions 20', and each recess 23 is formed in the same way as in the case of FIG. A raised portion 36 is provided.

When using the above-mentioned applicator for long objects, as shown in FIG. Make it run in the longitudinal direction. At the same time, each divided flow i compartment 20a.

20b independently through the air supply means 35) I
ll Apply appropriate pressure (for example, 0.5
A gauge pressure of ~0.7 K9/ca) is applied, and the coating agent is introduced from the coating agent guide means 31 to the divided flow chamber 20a.

Introduce the adhesive into 20b. Divided distribution room 20a
The adhesive introduced into the welding material 24 and the exit 25 via separate routes is applied to the corresponding outer surface of the three-striped portion 2a of the running beading material 2. .

Sanjo part 2a! =4% Since there is a predetermined clearance with the outlet 25, an adhesive layer is formed on the outer surface of the three-striped portion 2a with a thickness corresponding to the outlet 25. Q. For long objects (it is preferable that the opening 24 be provided with an appropriate clearance so as to act as a guide for the three-striped portion 28, but the bead material 2
runs at a predetermined speed and the coating agent does not leak from the long object 24, so the long object inlet 24 is connected to the three-strip section 2a.
In contrast, it may be formed with the same clearance as the long object outlet 25.

In Figure fLfJ6, the adhesive is applied only to the 10,000 three-row portion of the beaded rope material 2, but in the actual process, the adhesive is applied to the other three portions at the same time using a similar coating device. .

According to such a coating device of the present invention, the adhesive introduced into each divided distribution chamber (d)
Since the adhesive is applied with uniform pressure to the adhesive, no uncoated adhesive is left, and the parting line is formed as a desired clear straight line at the boundary between the three-striped portion 2a and the fin-striped portion 2c. Furthermore, the thickness of the applied adhesive layer can be adjusted by varying the traveling speed of the beading material 20 or the pressure at which the adhesive is introduced. Furthermore, in the coating apparatus of the present invention, since the coating agent distribution chamber 20 is composed of a plurality of independent divided distribution chambers, the adhesive introduction pressure to each divided distribution chamber can be set independently. It is possible to independently change the amount of coating agent supplied to the corresponding outer surface, thereby partially changing the thickness of the adhesive layer of the three-striped portion 2a exiting the elongated object outlet 25. According to this, the thickness of the adhesive layer changes based on the flow of the adhesive after the adhesive is applied (i.e.,
In consideration of the fact that the thickness of the upper part gradually decreases and the thickness of the lower part gradually increases due to gravity, the upper part can be coated thicker and the lower part thinner.

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 long objects such as rubber weather strips and rubber glass runs used in automobiles, etc. Contains things. 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 elongated object and the outlet may be arranged so that the elongated 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 drawings]

Figure 1 is a manufacturing process diagram of the bead, and Figures 2 to 4 are II-IT', III-III' and I of Figure 1, respectively.
FIG. 5 is a cross-sectional view and a plan view of the bead material taken along V-V' in FIG. It is a schematic configuration diagram, and FIG. 7 is an exploded perspective view of the vicinity of the coating agent distribution chamber, and FIG. 8 is a plan view of the base for configuring the coating agent distribution chamber and a sectional view thereof at 9 is a plan view of the base for configuring the coating agent distribution chamber. 2: Bead material 2a: Three-striped portion 2c: Fin striped portion 2A; Bead 20: Coating agent distribution, chamber 20a, 20b: Divided distribution room 20': Partition body 21:
Base 22: Lid 23: Recess 24: Long object population 25: Long object outlet 26: Slit 27: Coating agent introduction port 31, coating agent introduction means 32: Pressurized tank 33: Coating agent container

Claims (1)

[Claims] A coating agent is continuously applied to a specific part or all of the outer periphery of a long object whose cross section perpendicular to the longitudinal direction is constant, while the long object is running in the longitudinal direction. In a coating device, a coating agent distribution chamber into which a coating agent is introduced is provided with a long object outlet and a long object outlet that allow a 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 coated area on the outer periphery of the cross-sectional shape of the long object, and the coating agent distribution chamber connects the long object and the long object outlet. A divided circulation chamber is formed by dividing into a plurality of parts by one or more partitions having a partition surface essentially in the direction of travel of the long object and extending to the vicinity of the space,
- A σ5 coating device for long objects, characterized in that each divided distribution chamber is connected to an independent coating agent introduction means.