JPH0316185B2 - - 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.

In order to eliminate such drawbacks, the present invention provides a roller structure in which the surface layer of the outer circumferential surface of the wiping roller has a somewhat elastic structure, and the cleaning liquid is removed on the outer circumferential surface of the wiping roller on the supply side of the hard base material. The cleaning liquid is supplied to the outer circumferential surface, and then spread with a free roller.
The purpose of the present invention is to propose 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. 1 and 2 are a side view and a front view showing the basic configuration of the above-mentioned device. 1 is a lower roller (backup roller) made of a hard material such as metal, and mainly consists of a receiving surface, a feeding surface, It functions as a guide. 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. 6 is a free roller that spreads the cleaning liquid 5 on the outer circumferential surface of the building material supply side of the wiping roller 2, which is useful for cleaning the wiped paint adhering to the outer circumferential surface;
The outer peripheral surface of the wiping roller 2, especially on the building material supply side,
Moreover, it is brought into contact under pressure at a position below the supply port 4a. Reference numeral 7 designates a doctor plate so that it slides from the position where the wiping roller 2 and the decorative surface of the building material come into contact to the outer peripheral surface of the supply side of the wiping roller 2 between the free rollers 6 without going against the rotation of the wiping roller 2; , the cleaning liquid 5 present on the outer circumferential surface of the roller is wiped off and expelled to the outside of the roller 2 by contacting them under pressure. That is, the doctor plate 7 includes a somewhat elastic plate portion 8 and a weight 9, or a spring (not shown).
It is composed of 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, and as shown in FIG. 3, a decorative surface 13 has an uneven pattern of concave portions 14 and convex portions 15, and the depth Δd is about 0.3 to 1.5 mm. Note that there are various patterns of the uneven pattern. Reference numeral 18 denotes a lower doctor plate which contacts the outer circumferential surface of the lower roller 1 on the side to which the building material 12 is supplied, and is arranged so as not to go against the rotation of the lower roller 1 to remove dust attached to the outer circumference of the lower roller 1. It is something to do. Thereby, the outer peripheral surface of the lower roller 1 can be kept flat at all times, the pressure applied to the building material 12 is made uniform, and the wiping of the coating film 16a of the mesa portion 15 by the wiping roller 2 is maintained in a stable state. Furthermore, to explain the above device, the width W ₀ of the decorative surface 13, the width W ₁ for lower roller fitting, the width W ₂ of the lower roll 1, the width W ₃ of the wiping roller 2, the width W ₄ of the free roller 6, and the container 10. width W ₅ , length L ₁ , diameter of lower roller 1 D ₁ ,
The diameter of wiping roller 2 is D ₂ , and the diameter of free roller 6 is
When the diameter of 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)
4) are arranged in parallel to wipe off the paint 16a on the mesa part 15 of the paint film 16 that has just been applied to the entire surface of the decorative surface 13, and then sprinkle sand 17. 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 base coat 16 is applied to the decorative surface 13 of the building material 12 and the material is fed to the first device, the lower roller 1 and the wiping roller 2 hold the building material 12 while applying the cleaned outer peripheral surface to the mesa. Part of the paint 16a is wiped off, and the nozzle is rotated to the nozzle supply port 4a.
Then, a cleaning liquid 5 is supplied to the wiped outer circumferential surface, stored at the position of the free roller 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 flows down with rotation to some extent on the outer circumferential surface of the wiping roller 2 cleaned by the free roller 6, this is completely scraped off by the doctor plate 7 and brought into contact with the decorative surface 13 as a cleaned outer circumferential surface. By sequentially performing these steps using each device, the base coat 16a on the mesa portion 15 is completely wiped off. In addition, the lower doctor plate 18 constantly removes dust adhering to the outer periphery of the lower roller 1.
Alternatively, it may be brought into contact so as to be removed when necessary. Note that the number of devices and the pressure are determined empirically. Next, sand 1 is sent from a sand spreader (not shown).
7 on the entire decorative surface as shown in Figure 4c,
As shown in Figure d, the excess sand is blown away to form a decorative surface 13 with sand adhering only to the concave portions, and then an overcoat (not shown) is applied to the entire decorative surface and is dried to complete the decorative surface.

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 free roller 6 and the elastic member 3 to make it easier to clean the outer surface of the elastic material 3, or the above-mentioned device may be arranged in multiple stages in parallel, although not shown. Further, instead of the free roller 6, a plate may be arranged so as not to oppose the rotation of the wiping roller 2 and with a gap of Δt.

As described above, with 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 wiping roller is designed to reliably wash away the paint that has been wiped off and wipe it off again, so it has the characteristic of being able 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. The lower doctor plate removes dust etc. adhering to the outer periphery of the lower roller, which equalizes the pressure applied to the building materials, allowing the wiping roller to maintain stable wiping of the coating film on the mesa area. be.

[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...
...Free roller, 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 16a 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 free roller 6 that spreads the wiping roller 2 on the outer peripheral surface of the wiping roller 2;
and a doctor plate 7 for removing cleaning liquid 5 adhering to the outer peripheral surface of the wiping roller 2 to the outside of the wiping roller 2, and a lower doctor plate 18 for removing dust from the outer peripheral surface of the lower roller 1,
A lower roller 1 and a lower doctor plate 18 are disposed along the rotational direction of the lower roller 1 on the back side of a building material 12 made of a hard base material having an uneven pattern on the decorative surface 13, and on the front side of the building material 12. A wiping roller 2 is disposed and is also disposed oppositely to feed the building material 12 while clamping it under pressure.
The supply port 4a of the nozzle 4, the free roller 6, and the doctor plate 7 are arranged in this order on the outer peripheral surface of the wiping roller 2 facing the supply side of the wiping roller 2. Device.