JPH04709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiping device useful for wiping off only the coating film on the top surface of an uneven pattern on the decorative surface of a hard substrate, particularly a building material made of a metal plate or a synthetic resin plate.

For example, in order to manufacture a building material that has a decorative surface with a concave-convex pattern and has sand attached only to the concave-patterned surface, a base coat is applied to the entire surface of the decorative surface, and then a wiping roller is applied to the top surface of the convex portion (hereinafter simply referred to as It is common practice to wipe off the base coat present on the mesa area, then apply sand to the entire decorative surface, blow off the unadhered sand, apply an overcoat on top, and allow the paint film to dry. Ta. In addition, when manufacturing building materials with two-tone decorative surfaces, in order to make the colors of the recesses and mesa parts clearer, the paint film on the mesa parts is wiped off and a paint film is then applied to the mesa parts. was common. At this time, various devices have been proposed for wiping off the coating film on the mesa portion. However, the cleaning solution cannot reliably wipe off the paint film from the mesa area, and the cleaning solution or paint film remains on the mesa area, resulting in sand sparsely adhering to the mesa area.
The color was mottled and a beautiful cosmetic surface could not be obtained. Furthermore, since the cleaning liquid is supplied to the mesa side that has been wiped off, or to the decorative surface side where the coating film on the mesa area has been wiped off by a so-called wiping roller, the cleaning liquid may leak onto the decorative surface and contaminate the decorative surface. There was a drawback.

In order to eliminate such drawbacks, the present invention provides a roller structure in which the surface layer of the outer peripheral surface of the wiping roller has a somewhat elastic roller structure, and the cleaning liquid is located on the supply side of the hard base material on the outer peripheral surface of the wiping roller. Supply the cleaning liquid to the outer circumferential surface, then spread the cleaning liquid with a free roller,
The present invention proposes an apparatus that can manufacture building materials with beautiful decorative surfaces by wiping off the cleaning liquid with a doctor plate and removing it to the outside of the roller so that no cleaning liquid or the like remains on the mesa portion.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus for wiping off a coating film on a mesa portion according to the present invention will be described in detail below with reference to the drawings. Figures 1 and 2 are a side view and a front view showing the basic configuration of the above device, where 1 is the lower roller, which is made of a hard material such as metal and mainly functions as a receiving surface, a feeding surface, and a guide. It is. Reference numeral 2 is a wiping roller, and the elastic material 3 made of a rubber-based, synthetic rubber-based, or synthetic resin-based material with some elasticity, for example, a hardness of about 40 to 80 degrees, is formed on the surface layer by pasting or molding. be. The wiping roller 2 is mainly used to wipe away the paint film on the mesa portion of the building material, which will be described later, with a cleaned outer peripheral surface to which no paint film is attached, and also to transfer the building material in the direction of arrow A while holding the lower roller 1 and the building material between them. . Reference numeral 4 denotes a nozzle in which the cleaning liquid 5 is wiped off by a nozzle, and a nozzle supply port 4a is disposed at a position away from the outer circumferential surface of the roller 2, particularly at a position where it flows down in the rotational direction. In other words, the supply port 4a is arranged on the outer circumferential surface side of the supply side of building materials, which will be described later. This is to prevent the cleaning liquid 5 from flowing down onto the decorative surface of the building material after being wiped off. Reference numeral 6 is a bar coater that spreads the cleaning liquid 5 on the outer peripheral surface of the wiping roller 2 on the building material supply side and is useful for cleaning the wiped paint adhering to the outer peripheral surface. It is brought into contact with the wiping roller at a position below the supply port 4a and rotated in the opposite direction to the wiping roller 2, thereby achieving a better cleaning effect. Reference numeral 7 denotes a doctor plate that is placed so that it slides from the position where the wiping roller 2 contacts the decorative surface of the building material to the supply side outer peripheral surface of the wiping roller 2 between the bar coater 6 without going against the rotation of the wiping roller 2, and under pressure. The cleaning liquid 5 present on the outer peripheral surface of the roller is wiped off and expelled to the outside of the roller 2. That is, doctor plate 7
are a somewhat elastic plate portion 8 and a weight 9,
Alternatively, it may be constructed from a spring (not shown). Reference numeral 10 denotes a cleaning liquid storage container having a discharge port 11 at one end. Reference numeral 12 is a building material made of a hard base material, which has a decorative surface 13 with an uneven pattern of concave portions 14 and mesa portions 15, as shown in FIG. 3, and has a depth Δd of about 0.3 to 1.5 mm. Note that there are various patterns of the uneven pattern. To further explain the above device, the width W ₀ of the decorative surface 13, the width for fitting the lower roller 1,
W ₁ , Width of lower roll 1 W ₂ , Width of wiping roller 2
W ₃ , width W ₄ of bar coater 6 , width W ₅ of container 10 ,
Assuming that the length is L ₁ , the diameter of the lower roller 1 is D ₁ , the diameter of the wiping roller 2 is D ₂ , and the diameter of the bar coater 6 is D ₃ , W ₁ >W ₂ , W ₃ >W ₀ , W ₄ >W ₃ , W ₅ > W ₃ ,
D ₁ = D ₂ , D ₂ > D ₃ , L ₁ > D _1st place.

Next, the operation will be explained.

Now, a plurality of the above-mentioned devices (not shown in the figure)
The paint film 16 that has just been applied to the entire surface of the decorative surface 13 is wiped off from the paint 16a on the mesa portion 15, and then the sand 17 is spread. However, it is assumed that the excess sand and the sand 17 on the mesa portion 15 are removed by wind blowing. In addition, the lower roller 1 and wiping roller 2 of each device are driven by gears, chains, etc. in the direction of the arrows and at approximately the same speed, and the contact portion of the elastic material 3 that is in contact with the lower roller 1 is slightly deformed. Assume that the two are placed opposite each other with a certain amount of pressure applied. Therefore, when the building material 12 is fed to the first device immediately after the coating film 16 serving as a base coat has been applied to the decorative surface 13 of the building material 12, the lower roller 1 and the wiping roller 2 remove the building material 12.
The mesa part 15 is cleaned with the outer peripheral surface while holding the mesa part 15.
Wipe off some of the paint 16a and remove the nozzle supply port 4a.
Rotate until. A cleaning liquid 5 is supplied to the wiped outer circumferential surface, stored at the bar coater 6, and the outer circumferential surface is cleaned, and the washed liquid is dropped into a container 10 from both sides of the wiping roller 2.
Further, since the cleaning liquid 5 falls on the outer circumferential surface of the wiping roller 2 cleaned by the bar coater 6 as it rotates to some extent, it is completely scraped off by a doctor plate 7 and brought into contact with the decorative surface 13 as a cleaned outer circumferential surface. These steps are sequentially performed in each device to form the paint 16a that will serve as the base coat for the mesa portion 15.
It completely wipes it away. Note that the number of devices and the pressure are determined empirically. Next, sand 17 is spread from a sand spreader (not shown) over the entire surface of the decorative surface 13 as shown in FIG. After that, an overcoat (not shown) is applied to the entire surface of the decorative surface 13 and then dried to complete the decorative surface 13.

What has been described above is only one embodiment of the device according to the present invention, and as shown in FIG.
A gap of Δt may be provided between the bar coater 6 and the bar coater 6 to make it easier to clean the outer surface of the elastic material 3, or the above-mentioned apparatus may be arranged in parallel in multiple stages (not shown). Furthermore, although the bar coater 6 is rotated in the same direction as the wiping roll 2, its rotational speed can be faster or slower than that of the roll. Alternatively, the doctor plate 7 may be attached as shown by the dashed line in FIG. 1 to remove dust.

As described above, according to the device for wiping off the paint film on the top surface of the convex portion according to the present invention, the cleaning liquid does not leak onto the wiped surface at all, so sand does not adhere to the mesa portion, and a decorative surface with a beautiful appearance can be formed. It has characteristics. The outer circumferential surface of the wiping roller is configured to reliably wash away any paint that has been wiped off before wiping it off again, making it possible to cleanly wipe off the paint film on the mesa area. It has the characteristic of being able to guide the building materials without displacing them as it clamps and transports the building materials under elasticity. Furthermore, since the cleaning liquid is stored in a container at the lowest end, filtered and circulated, the cleaning liquid can be used effectively. It has the feature that the cleaning solution does not leak onto the makeup surface that has been wiped off.

[Brief explanation of drawings]

1 and 2 are a side view and a front view of an apparatus for wiping off a coating film on the top surface of a convex portion according to the present invention, FIG. 3 is a perspective view showing an example of a building material, and FIGS. 4 a to d are building materials. 5th manufacturing process diagram showing a part of the decorative surface of
The figure is an explanatory diagram showing another embodiment. 1...lower roller, 2...wiping roller, 6...
...Bar coater, 7...Doctor plate.

Claims (1)

[Claims] 1 A lower roller 1 made of a hard material, a somewhat elastic wiping roller 2 for wiping off the coating film 16 on the top surface 15 of the convex portion of the building material 12 made of a hard base material, a nozzle 4 for supplying the cleaning liquid 5, and the cleaning liquid 5 A bar coater 6 that spreads the cleaning liquid 5 on the outer peripheral surface of the wiping roller 2 and cleans it, and a doctor plate 7 that removes the cleaning liquid 5 adhering to the outer peripheral surface of the wiping roller 2 to the outside of the wiping roller 2. A lower roller 1 is disposed on the back side of a building material 12 made of a hard base material having a pattern, and a wiping roller 2 is disposed on the front side of the building material 12, and these rollers are arranged opposite each other so as to sandwich and feed the building material 12 under pressure. Also, the building material 1
A supply port for the nozzle 4 is provided on the outer peripheral surface of the wiping roller 2 facing the supply side of the wiping roller 2, a bar coater 6 rotating in the opposite direction to the wiping roller 2, and a doctor plate 7.
A device for wiping off a coating film 16 on a top surface 15 of a convex portion, characterized in that the device is arranged in this order.