JP2581643B2 - Coating equipment and equipment for supplying paint etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive, a pressure-sensitive adhesive, a paint, etc. (hereinafter, referred to as a paint) on a surface of a flexible support (hereinafter, referred to simply as a support) such as a plastic film, paper, or metal foil. And a device for supplying paint and the like.

[0002]

2. Description of the Related Art Conventionally, as a coating apparatus for applying a paint or the like to the surface of a continuously transported support to form a stripe, a reverse roll type coating apparatus is disclosed in JP-B-63-1.
It is known from US Pat. Hereinafter, the conventional reverse roll type coating apparatus will be described with reference to the drawings.

In FIG. 6, a is a support, b is a paint, etc.
c is a backup roll, d is an uncoated portion forming blade,
e is an applicator roll, f is a metering roll, g
Is a doctor. The arrows in the figure indicate the direction of rotation of each roll. FIG. 7A is a plan view showing a state in which a coating material or the like is applied in a stripe shape on the surface of the support in the application direction j by the apparatus shown in FIG. 6, and FIG. 7B is a plan view of FIG. Q
It is sectional drawing in the -Q 'line.

In the coating apparatus of the reverse roll type configured as described above, first, a support a to be coated is wound around a backup roll c and transported. The paint b is scraped up by the applicator roll e, and the coating thickness is determined by the gap between the applicator roll e and the metalling roll f.
Is scraped off by doctor g. The coating material b on the applicator roll e is applied to the uncoated portion h as shown in FIGS. 7A and 7B by a plurality of uncoated portion forming blades d provided at intervals in the surface length direction of the applicator roll e. Is formed and provided in a stripe shape. Next, the material is nipped by the backup roll c, and the coating material b is transferred to the support a in a stripe shape to form a stripe-shaped coating portion i.

[0005]

However, according to the above-mentioned coating apparatus of the conventionally known reverse roll type, there are the following technical problems. That is, when the coating material b having a constant coating thickness due to the gap between the applicator roll e and the metalling roll f forms the non-coated portion h by the non-coated portion forming blade d (the stripe-shaped coated portion is formed). In particular, in the case of a paint containing a hard pigment such as a magnetic paint, an uncoated portion forming blade d
There was a problem that the coating material and the like were applied to the uncoated portion h with the elapse of time due to severe wear.

Further, when the paint or the like b of the stripe-shaped coated portion i formed by the uncoated portion forming blade d is transferred from the applicator roll e to the surface of the support a, the coating edge is disturbed and the sharpness is poor. There was a problem.

Accordingly, an object of the present invention is to improve the problem that a paint or the like is applied to an uncoated portion due to abrasion of the uncoated portion forming blade d and to occur at the time of coating or transferring to a support. An object of the present invention is to provide a coating apparatus for applying a paint or the like in a stripe shape so as to improve the disturbance of a coating edge.

[0008]

Means for Solving the Problems To achieve the above object, a coating apparatus characterized by the present invention has the following configuration. That is, the present invention provides a coating apparatus having a pressing roll for supporting a support, a device for supplying paint and the like to the support, a bar head for scraping off excess paint and the like, and a roll for transporting the support. An apparatus for supplying the paint or the like forms a tubular body, a slit-shaped nozzle is provided in a surface length direction of the tubular body, and an outer pipe provided with one or more shims in the nozzle portion; An inner pipe having an opening is provided inside the pipe, paint or the like is supplied to the inner pipe, the paint or the like is discharged from between the shims, and the paint or the like is applied to the surface of the support to be conveyed. A coating apparatus characterized in that excess paint or the like is scraped off by a head and applied in a stripe shape. Further, the present invention provides an outer tube having a slit-shaped nozzle provided in the surface length direction of the tubular body and having one or more shims in the nozzle portion, and an inner tube having an opening inside the outer tube. A paint or the like which supplies paint or the like to the inner tube and discharges the paint or the like from between the shims.

[0009]

In the present invention, since the device for supplying the paint and the like has a double structure consisting of an outer tube and an inner tube, the paint and the like are rectified while flowing from the inner tube to the outer tube. The pressure and the supply amount of the striped paint or the like discharged from the nozzles become substantially constant over the entire area in the surface length direction. For this reason, the excess paint scraped off by the bar head can be minimized, and the spread of the paint and the like can be reduced by the bar head, and the coating can be applied to the support without disturbing the application edge. Further, since the metering is performed by the bar head, the coating thickness of all the stripes is formed uniformly.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a schematic view of a coating apparatus showing one embodiment of the present invention. FIG. 2 is an enlarged sectional view of an apparatus for supplying paint and the like.
FIG. 4 is a cross-sectional view of the apparatus for supplying paint and the like as viewed from X to X 'in FIG. 1, and FIG. 4 is a plan view showing a nozzle and shim mounting portion in the apparatus for supplying paint and the like in FIG.

Referring to FIGS. 1 to 4, first, the present coating apparatus comprises a pressing roll 2 for supporting a support 1 and an apparatus 3 for supplying a paint or the like to the support 1 disposed below the pressing roll 2. And a bar head 4 for scraping off excess paint and the like, and a roll 5 for transporting the support 1. As shown in FIGS. 2 and 3, the apparatus 3 for supplying the paint or the like has a double tubular structure. An outer tube 7 provided with a slit-shaped nozzle 6 and an inner tube 8 having an opening inside the outer tube 7 are arranged in the surface length direction of the tubular body. The paint or the like is supplied to the inner pipe 8 from the Y direction, and the paint or the like is discharged from the nozzle 6, and the paint or the like that has not been discharged is discharged from the Z direction and used for circulation.

Here, the nozzle 6 and the outer tube 7 are fixed by screws 9. A slit adjusting plate 10 for rectifying the flow of paint or the like is attached to one of the ends of the opening of the inner tube 8. Further, the outer tube 7 and the inner tube 8 are not limited to the cylindrical shapes as shown in FIGS. 2 to 4, but may have any shape such as a triangular prism, a quadrangular prism, or the like, and a plurality of the inner tubes 8 may be provided. Further, the nozzle 6 may be formed integrally with the outer tube 7. The distance G between the support 1 on the surface of the pressing roll 2 and the tip of the nozzle 6 is 200 μm in order to apply paint or the like to the support 1 in a rectified state.
It is preferable to set the thickness to 500 μm.

The paint or the like discharged from the nozzle 6 is
Shim 1 inserted into the nozzle portion shown in FIG.
1 makes it possible to supply and apply to the support 1 in the form of a stripe when ejected from the nozzle 6. In this way, the support 1 coated in a stripe shape passes through the bar head 4 so that excess paint or the like on the stripe-shaped coating surface is scraped off, the coating amount is adjusted, and the support material is adjusted by an appropriate amount. Applied to the surface.

Although the bar head 4 is normally used while being rotated, it is preferable to use the bar head 4 in a stopped state in order to reduce disturbance of the coating edge. For this reason, it is preferable to use a stainless steel wire-wound or chrome-plated one. still,
As shown in FIG. 5A, one or more shims may be provided on the nozzle 6 for the shim 11 provided for application in a stripe shape. Alternatively, as shown in FIG. A nozzle processed into one fixed piece may be provided in the nozzle 6. Further, a shim may be provided on the nozzle 6 as an integral molding.

The dimension W (the thickness of the shim) in FIG. 5 is preferably set to about 1 to 3 mm in order to maintain the sharpness of the stripe, and W 'is set to about 1 mm in terms of size and processing accuracy. Preferred but not limiting. The dimension H is preferably set to be slightly smaller than the stripe width in consideration of the viscosity of the paint or the like and a slight spread by the bar head, and the dimension L is arbitrarily determined by the application pitch. The material of the shim is preferably made of plastic such as polytetrafluoroethylene in order to protect the nozzle and maintain adhesion.
It may be made of metal such as stainless steel.

[0016]

According to the coating apparatus and the apparatus for supplying a paint or the like of the present invention, the following effects can be obtained. Since there is no blade for forming a stripe as in the related art, there is no problem that a paint or the like is applied to an uncoated portion due to abrasion of the blade. Also, since the device for supplying paint etc. has a double structure consisting of an outer tube and an inner tube, it is rectified while the paint etc. flows out from the inner tube to the outer tube, and is striped to be discharged from the nozzle Since the pressure and supply amount of paint etc. are almost constant over the entire area in the surface length direction and the metering is performed by the bar head, the coating thickness of all stripes is formed uniformly, the disturbance of the coating edge can be reduced, and the quality can be reduced. improves.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a coating apparatus of the present invention.

FIG. 2 is an enlarged sectional view of an apparatus for supplying paint and the like.

FIG. 3 is a cross-sectional view of an apparatus for supplying a paint or the like viewed from XX of FIG. 1;

FIG. 4 is a plan view showing a mounting portion of a nozzle and a shim.

FIG. 5 is a diagram showing a form of a shim.

FIG. 6 is a schematic view of a conventional apparatus for coating in a stripe shape.

FIG. 7 is a diagram showing a state in which the support is applied in a stripe shape on a support;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support body 2 Pressing roll 3 Apparatus which supplies paint etc. 4 Bar head 5 Roll which carries a support body 6 Nozzle 7 Outer tube 8 Inner tube 9 Screw 10 Slit adjustment plate 11 Shim

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takao Kaneko Examiner, Technical Research Institute, Tomoe Research Institute, Tomoegawa Paper Mill, Shizuoka, Shizuoka Pref. Satoshi Morikawa

Claims (2)

(57) [Claims] A pressing roll for supporting a support;
A coating apparatus having a device for supplying paint or the like to the support, a bar head for scraping off excess paint or the like, and a roll for transporting the support, wherein the device for supplying the paint or the like is a tubular body. An outer tube having a slit-shaped nozzle provided in the surface length direction of the tubular body, one or more shims provided in the nozzle portion, and an inner tube having an opening inside the outer tube. By supplying a paint or the like to the inner pipe and discharging the paint or the like from between the shims, the paint or the like is applied to the surface of the support to be conveyed, and the excess paint or the like is scraped off by a bar head and applied. Characteristic coating equipment. 2. An outer tube provided with a slit-shaped nozzle in the surface length direction of the tubular body and having at least one shim in the nozzle portion, and an inner tube having an opening inside the outer tube. An apparatus for supplying a paint or the like, wherein the paint or the like is supplied to the inner pipe and the paint or the like is discharged from between the shims.