JPH079006A - Dull finish metal plate with excellent stain removal - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a metal plate used for kitchen equipment, vehicle interiors, doors, etc., which can easily remove stains such as fingerprint marks, hand marks, and dust, and has good drainage property. [Structure] A laser dull roll has a width of about 6 on the metal plate surface.
A metal plate in which a large number of linear grooves having a depth of 0 μm and a depth of about 10 μm are arranged in parallel at a pitch of 120 μm is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dull-finished metal plate having an excellent dirt removing property, which has an extremely good drainage property, and is an outer plate of a vehicle such as a train, monorail, bus, truck or passenger car.
Interiors, doors; outer panels for ships such as passenger ships, motor boats, yachts, interiors; elevator doors, interiors; escalator side panels; building exterior walls, interiors, roofs, and other building materials; commercial refrigerators, microwave ovens, etc. doors, interiors The present invention relates to dull-finished stainless steel plates such as kitchen equipment and stainless steel containers, dull-finished metal plates such as aluminum plates and titanium plates.

[0002]

2. Description of the Related Art Conventionally, a metal plate is rolled by a shot blasting dull finishing roll, an electric discharge machining dull finishing roll, or the like, and the unevenness of the roll is transferred to the surface of the metal plate so that a large number of recesses or protrusions are formed. A technique for manufacturing a dull-finished metal plate formed on the surface is known. More recently, many methods have been disclosed for rolling a metal plate by a laser dull finishing roll in which the surface of the roll is directly melt-processed by irradiating the surface of the roll with a laser beam. For example, Japanese Patent Publication No. 3-38923, Japanese Patent Publication No. 3-38924, Japanese Patent Publication No. 3-39761,
Japanese Patent Publication No. 3-42961 and Japanese Patent Publication No. 3-47925 are available.

The shot blasting method is the oldest dull processing method, in which a large number of hard particles called shots are collided with the roll surface to dent the roll surface to form fine irregularities on the roll surface. In the electric discharge machining method, a high voltage is applied between a roll and an electrode to cause electric discharge, and the heat microscopically melts and evaporates the roll surface to form fine irregularities. The laser dull processing method irradiates a rotating roll surface with a laser beam with a high energy density in a pulsed manner to microscopically melt the roll surface at that portion and blow a high-pressure assist gas to melt it. Are blown off or deformed to form a large number of donut-shaped or crescent-shaped protrusions regularly.

By rolling the metal plate with the dull finish roll manufactured by any of the above methods, the unevenness of the roll surface is transferred to the surface of the metal plate to manufacture the required dull finish metal plate. As a completely different method, there is a method called hairline finishing in which the surface of a metal plate close to the mirror surface is directly polished with paper to give a fine linear pattern. The dull-finished metal plate surface produced in this manner is less prone to stains such as hand marks and fingerprints than the mirror-finished metal plate surface without unevenness. Further, since it diffusely reflects light rays, it is excellent in the property of preventing glare, that is, the antiglare property. For this reason, recently, the outer panels of vehicles such as commuter trains, subways, monorails, buses, and trucks, interiors, doors, ocean cruisers, outer panels of ships such as motor boats, interiors, elevator doors, interiors, escalator side panels, and commercial refrigerators. , Dull-finished metal plates such as dull-stainless steel plates and dull-finished aluminum plates have been widely used in kitchen equipment.

[0005]

It is important that vehicles and kitchen appliances have good drainage properties during cleaning and that stains can be easily removed. Common types of dirt include hand marks, fingerprint marks, mud, dust, and oil film. Recently, it is also important to remove graffiti using oil-based paint pens, such as those found on New York subways. When the surface is a mirror surface, it is relatively easy to remove the dirt, but in the dull-finished metal plate, the dirt is likely to be hardened in the microscopic recesses on the surface, and it is difficult to remove the dirt. Therefore, dirt such as hand marks and fingerprints are not noticeable,
Excellent drainage and easy removal of dirt are mutually contradictory properties. An object of the present invention is to provide a metal plate in which stains such as hand marks and fingerprints are not conspicuous, excellent drainage properties, and stains can be easily removed.

[0006]

In order to solve the above-mentioned problems, the present invention has made a special ingenuity on the concavo-convex shape of the surface of the dull-finished metal plate. In the conventional dull-finished metal plate, stains are likely to accumulate in microscopic recesses on the surface, and it is difficult to remove the stains. The inventors of the present invention have found that, when the concave portion is composed of a large number of parallel straight grooves, the draining property is better and the dirt can be removed very easily as compared with the case where the concave portion is isolated in a pond shape. Came to. The present invention is a dull-finished metal plate excellent in stain removability, characterized in that the concave portions having microscopic asperities on the surface are composed of a large number of parallel linear grooves.

[0007]

[Function] In the interior and exterior walls of kitchen equipment, doors, vehicle interiors, doors, etc., beautiful surfaces such as fingerprint marks are not conspicuous, they can be easily removed by wiping, and they have excellent drainability. Is requested. Furthermore, it is more preferable to have antiglare properties. If the recess is in the form of parallel straight grooves, the dirt accumulated there can be discharged along the groove, and the dirt can be removed by simply wiping in a direction parallel to the groove. In addition, the original performance of the dull-finished metal plate, which is excellent in drainage and is free from dirt such as hand marks and fingerprints, is relatively well maintained. In the present invention, microscopic means that the width of the groove is 30 μm to 2000 μm. It is preferably 50 to 500 μm.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for producing a dull-finished metal sheet according to the present invention and its performance will be described below with reference to the drawings. FIG. 1 is a chart of a representative example of a dull-finished metal plate according to the present invention measured by a three-dimensional surface roughness meter. Width about 60μm Depth about 10μ
A large number of m linear grooves are arranged in parallel at a pitch of 120 μm. The method disclosed in Japanese Patent Laid-Open No. 2-175882 can be used for producing the roll for producing the metal plate according to the present invention. A typical example of this technique will be briefly described below.

An acid-resistant resin mixed with a light absorber is uniformly applied to the surface of the roll to a film thickness of about 10 μm. While the roll is rotated, a pulsed beam is slowly moved in the roll axis direction from the YAG laser oscillator with a Q switch onto the surface of the roll to irradiate it. It is also possible to transmit an optical fiber between the YAG laser beam oscillator and the objective lens. The output capacity of the YAG laser is 2 to 4 on the roll surface when the spot diameter on the roll surface is about 40 μm.
Watts are enough. The position of the laser beam spot is 2 from the position detector parallel to the roll axis and the encoder (rotation angle detector) attached to the end of the roll axis.
Can be accurately and uniquely determined in the dimensional coordinate system. The pulse output timing is controlled so that a desired pattern is obtained, and only the resin in the portion where the concave portion is to be formed is removed. After that, an uneven pattern is formed by etching the roll surface with an acidic corrosive solution. By setting the laser beam irradiation position accuracy to about ± 2 μm and the distance between adjacent beam spots to about 30 μm with respect to the roll rotation direction and the roll axis direction, it is possible to accurately roll any unevenness in which dots of a minimum unit of 30 μm are combined. It can be formed on the surface. Of course, the dull processing can be performed by the conventional photoetching method.

In the example of the present invention, the above-mentioned Japanese Unexamined Patent Publication No. 2-175882.
SUS with an entrance side plate thickness of 1.0 mm by a Sendzimer rolling machine using a laser dull roll manufactured by the method disclosed in Japanese Patent Publication No.
The 304 steel plate was rolled down to 0.95 mm to transfer an uneven pattern on the surface of the steel plate. As a comparative example, using a roll dulled by the conventional shot blasting method, using a Sendzimer rolling machine, the entrance side plate thickness of 1.0 mm was changed to 0.95 mm.
SUS304 that has been pressed down to transfer the uneven pattern to the surface
A steel plate was used. FIG. 2 is a chart of the comparative material measured with a three-dimensional surface roughness meter. An irregular pond-shaped recess with a depth of about 10 μm is seen.

As a method of measuring the stain removability, an oil-based marker pen was used to apply an oil-based paint to the surface of the sample, and the sample was lightly wiped with gauze soaked with ethanol, and the remaining amount was visually measured in three steps. Table 1 shows the evaluation results of stain removability. 50 × 5 for each sample
Prepare 10 0mm square samples, apply oil paint to the sample surface with an oil-based marker pen, and gently wipe with ethanol-soaked gauze.
The evaluation was divided into stages. In the table, ◯ indicates that the stain can be removed well, Δ indicates that the stain is slightly left, and x indicates that the stain is not removed sufficiently. It can be seen that the stainless steel sheet according to the present invention is easier to wipe off the dirt than the conventional material.

[0012]

[Table 1]

[0013]

EFFECTS OF THE INVENTION According to the present invention, a dull-finished surface is formed and microscopically concave and convex concave portions are formed into continuous parallel linear grooves so that dirt accumulated in the concave portions can be simply wiped along the grooves. It is possible to obtain a metal plate having an extremely excellent performance that can be removed by the method of (1) and (2) and has excellent drainage property. The present invention includes not only stainless steel plates but also aluminum plates, titanium plates and other metal plates and alloy plates.

[Brief description of drawings]

FIG. 1 is a chart of a dull-finished metal plate according to the present invention measured by a three-dimensional surface roughness meter.

FIG. 2 is a chart of a comparative material measured with a three-dimensional surface roughness meter.

[Explanation of symbols]

 1 Microscopic convex part 2 Microscopic concave part

Claims (1)

[Claims] 1. A dull-finished metal plate excellent in stain removability, characterized in that concave portions having microscopic asperities on the surface are composed of a large number of parallel linear grooves.