JP2002119906A - Flow coater and stripe coating process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow coater that rapidly performs stripe coating and to provide a coating method for an oblique stripe pattern. SOLUTION: Troughs 13 as flow interceptors for receiving a part of a coating material curtain 7 are provided at several sites of the curtain 7 so that they may cross the curtain 7 to divide it into stripes, and a rectangular substrate 12 is conveyed in a manner slant to the direction of the travel of the conveyors 1 and 2 to coat the substrate with oblique stripes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for forming a striped paint curtain in a flow coater by partially cutting down the flow of several paint curtains, and using the flow coater to form an oblique shape. The present invention relates to a coating method for performing a stripe pattern coating.

[0002]

2. Description of the Related Art Yellow and black inclined stripes are painted on a flat part of a danger fence used for separating a danger area such as a construction site or a construction site. It was common to spray-coat black by masking in a striped pattern. For this reason, there are problems of an adverse effect on the environment due to overspray at the time of spray coating, and a problem of low workability improvement such as masking work and regular cleaning of paint adhered to the masking.

[0003] On the other hand, the flow coater coating is often used for coating a flat coated object because a coated object can be conveyed at a speed of about 100 m / min by a conveyor to perform high-speed coating.
Since a paint curtain is formed over the entire width of a paint discharge gap (hereinafter, referred to as a slit) for forming a paint curtain, it is often necessary to partially cut several places to form a striped paint curtain. Had problems.

FIG. 4 shows one method of forming a striped paint curtain using a flow coater. A closing member 20 is provided at a portion of the slit 6a provided at the lower portion of the head 6 where the paint is discharged, where the paint curtain is unnecessary. There is a method of directly stopping the formation of the paint curtain by directly attaching the paint, but it cannot be used due to the following problems. (1) Since the viscosity of the paint changes due to the temperature of the paint which changes with the season, the slit distance changes at the time of washing, the amount of paint flowing down changes, and the coating thickness changes. It is necessary to finely adjust the slit distance set to about 0.4 mm as needed, but fine adjustment of the slit distance cannot be easily performed because the closing member is sandwiched. (2) When the paint supplied from the pump is temporarily stored in the head 6 and uniformly flows through the slit 6a, the flow rate of the paint tends to increase on both sides of the closing member 19,
The coating film becomes uneven.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flow coater and an oblique stripe pattern coating method which can perform stripe coating at a high speed using a flow coater.

[0006]

According to a first aspect of the present invention, there is provided a coating method using a flow coater for applying a coating material to be conveyed on a conveyor by passing the coating material under a paint curtain flowing down from a head. In the second invention, the downflow blocking means is a gutter provided so as to partially intersect the paint curtain, and the paint collected by the gutter is provided. Is returned to the paint container and reused. In a third aspect of the present invention, a flow guide for the paint curtain is provided on a side surface of the flow-off blocking means in contact with the paint curtain, and in a fourth aspect, a side surface of the gutter crossing the paint curtain has It is characterized by a downflow guide. In the fifth aspect, the rectangular flat plate-like coated object is conveyed while being inclined with respect to the traveling direction of the conveyor using the above-described flow coater coating apparatus.

[0007]

FIG. 1 is a view showing the overall structure of a flow coater according to an embodiment of the present invention. FIG. 1 (a) is a front view as viewed from an exit conveyor side, and FIG. 1 (b) does not cut a paint curtain. FIG. 3C is a side view of a portion where the paint curtain is cut. Further, (d) is a plan view of a parallel-painted article, and (e) is a plan view of an inclined article.

Referring to FIG. 1, the entrance conveyor 1 and the exit conveyor 2 are driven by rollers 3.4, and the painted object 12 is passed under the head 6 to be painted.
At the exit conveyor 2. Then, when the paint 9 is sent from the paint container 8 to the head 6 via the filter F through the pipe 11 by the pump P, the paint 9 passes through the slit 6a provided in the lower portion of the head 6 and the paint curtain 7
Paint 1 flowing down and passing under paint curtain 7
2 is applied.

At this time, as shown in FIG. 3 (a), when a falling-off blocker 18 for receiving a part of the paint curtain 7 is provided so as to intersect the paint curtain 7 at several places of the paint curtain 7, The paint curtain 7 does not flow directly below the blocking member 18. Side plates 18a are formed on both sides of the downflow blocker 18 having a mountain-shaped cross section so as to face downward.
3 (b) and 3 (c) show examples of the shape of the side surface of the falling-off blocker 18. In FIG. 3 (b), the paint curtain flows down in a valley with a V-shape in the front-rear direction. Placed in
A flow-down guide 19 is disposed downward on the center side plate 18a of the V-shape. In FIG. 3 (c), a guide plate 18c is provided upward in the front-rear direction to form a gutter shape, and a flow-down guide 19 such as a round bar or a chain is disposed on the side plates 18b on both sides in a downward direction.

As a result, the paint curtain 7 blocked by the downflow blocking member 18 flows right and left and flows down from the side plates 18a and 18b along a downflow guide 19 such as a round bar or a chain. The so-called contraction phenomenon in which the particles shrink and become thinner is prevented. However, in this method, the paint curtain blocked by the downflow blocker 18 concentrates on the downflow guide 19 and the amount of the downflow from the downflow guide 19 increases, so that a uniform paint curtain 7 cannot be obtained. It cannot be used except when rough painting is allowed.

FIG. 2 shows a method for remedying this drawback. A gutter 13 is provided at several places of the paint curtain 7 so as to intercept the paint curtain 7 as a downflow blocker for receiving a part of the paint curtain 7. Therefore, a state where the paint curtain 7 does not flow directly below the gutter 13 is obtained. And gutter 1
3 are provided with flow-down guides 17 on both side surfaces 13a, and the paint curtain 7 in contact with both side surfaces 13a is
a and the round bar 17b smoothly flows down. As a result, the problem that the flow rate of the paint curtain 7 flowing down by the flow-down guide 17 is partially increased is solved.

FIG. 2 (c) shows an example in which the center of the gutter 13A has a mountain shape in order to prevent the paint from flowing on the lower surface of the gutter 13A. Then, the paint cut by the gutter 13 as shown in FIG.
Are flowed into the gutter 5 by the flow path 15 shown in FIG. Further, the paint curtain 7 in the case where there is no paint 12 or the paint curtain 7 which has not flowed down on the paint 12 also flows down to the gutter 5 and is collected in the paint container 8 as the recovered paint 10.

As described above, by passing under the striped paint curtain, a striped pattern having alternately non-painted portions 16a and painted portions 16b is formed as shown in FIG. 1D. be able to. Then, as shown in FIG. 1 (e), when the painted object 12 is conveyed obliquely with respect to the conveyors 1 and 2, an oblique striped pattern is obtained. By applying a black paint, it is possible to easily paint a yellow and black diagonal stripe pattern used for a danger fence or the like.

Further, since the gutter 13 and the collecting gutter 14 are integrally formed, the gutter 13 and the gutter 14 can be easily removed from under the paint curtain 7, so that stripe coating can be performed simply by attaching the gutter 13 to a general flow coater. As a result, first, gutter 1
With the 3 and the collecting gutter 14 removed, the entire surface of the painted material is yellow-painted with yellow paint and dried, and then the cutting gutter 13 and the collecting gutter 14 are attached, and a black oblique black paint is used. Can be applied.

[0015]

Since the present invention is configured as described above, it has the following effects. (1) Since the oblique striped pattern can be applied at once without using masking or the like, the coating can be performed efficiently and the workability is greatly improved. (2) Since painting without overspray can be performed, it is possible to improve the working environment and reduce the discharge of paint mist.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a flow coater showing an embodiment of the present invention, (a) is a front view seen from an exit conveyor side,
(B) is a side view of a portion where the paint curtain is not cut, and (c) is a side view of a portion where the paint curtain is cut. Furthermore, (d) is a plan view of a painted object with parallel painting.
(E) shows a plan view of the painted object subjected to the inclined painting.

FIG. 2 is a detailed view of a paint curtain cutting part of FIG. 1,
(A), (c) is a front view, (b) is a side view of a gutter.

FIG. 3A is a front view of another embodiment, and FIG.
(C) is a side view of the gutter.

FIG. 4 is a front view of a conventional example.

[Explanation of symbols]

 1.2 Conveyor 5 Gutter 6 Head 6a Slit 7 Paint Curtain 10 Collected Paint 12 Painted Material 13 Gutter (Downflow Blocking Means) 17 Downflow Guide 18 Downflow Blocker

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 5/06 101 B05D 5/06 101B

Claims (5)

[Claims] In a coating by a flow coater for applying a coating material to be conveyed placed on a conveyor and passing it under a paint curtain flowing down from a head, downflow blocking means for partially blocking a plurality of portions of the paint curtain. A flow coater coating apparatus characterized by having a. 2. The gutter according to claim 1, wherein said flow blocking means is provided so as to partially intersect said paint curtain, and the paint recovered by said gutter is returned to a paint container and reused. The flow coater coating device according to claim 1. 3. The flow coater coating apparatus according to claim 1, wherein a flow guide for the paint curtain is provided on a side surface of the flow blocking means in contact with the paint curtain. 4. The flow coater coating apparatus according to claim 2, wherein a flow guide for the paint curtain is provided on a side surface of the gutter intersecting the paint curtain. 5. The claim 1, claim 2, claim 3, and claim 4.
A coating method, characterized in that a rectangular plate-shaped coating is conveyed by being inclined with respect to the traveling direction of a conveyor by using the flow coater coating apparatus described in (1).