JPS6021785B2 - Painted surface pressing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for appropriately flattening the convex portions of the coated surface of a workpiece coated in a concave and convex manner before the coated surface is completely cured (so-called head cutting).

In particular, the present invention relates to an effective coating surface pressing device, ie, a head cutting device, which is applied to coated objects having vertical or inclined coating surfaces. BACKGROUND ART Conventionally, in order to improve the aesthetic appearance of the interior and exterior walls of a building, a three-dimensional pattern of projections and depressions has been applied to the surfaces thereof.

To form such an uneven three-dimensional pattern, workers sometimes do it directly on the wall surface at construction sites, etc., but from the viewpoint of mass production, recently it has been done in factories continuously on the decorative laminate base material surface in advance. It has started to be produced. For this type of decorative board with an uneven painted surface, from the viewpoint of standardizing the maximum thickness of the coated surface and from the viewpoint of design, the convex portions of the coated surface are appropriately head-cut to make the height of the convex portions uniform. This is often required. For this purpose, it is advantageous to spread the convex-forming coating part with a roller or the like to flatten it to a certain thickness before the convex-forming application part is completely cured, rather than scraping the hardened convex parts. In this case, it is actually extremely difficult to head-cut the surface coated with normal coating to a certain thickness. That is, even if rollers of the same weight are used, the amount of head cut varies depending on the degree of hardening of the convex portions of the coated surface. Therefore, different coating methods have been devised that are advantageous for forming a head-cut uneven painted surface.

That is, first, a coating for forming convex portions is applied in a scattered manner on an undercoat film layer in which a large number of aggregates having a certain particle size are evenly fixed on the surface of a decorative board base material, and then the convex portions are head-cut. The method is to do so. In this case, if a roller with a certain weight or more is used, the head can be accurately and uniformly cut to a thickness corresponding to the particle size of the aggregate. Examples of aggregates include anchor sand, cold water sand, glass beads, quartz powder, plastic powder, etc. In order to fix the bones onto the base material surface, aggregates can be used with water-based paints, solid paints, and non-solvents. The aggregate may be mixed with a paint, an organic solvent-diluted paint, etc., and then applied and dried, or the aggregate may be sprayed immediately after the paint is applied, and the paint is dried. The convex part forming coating may be a known one, for example, JIS-A6910.
An example of this is the village of fireworks stipulated in . By the way, when head-cutting the convex parts coated using this method, there will be no problem if the base material surface of the IQ hoko board is completely flat, but in reality, there may be some warpage or warping on the base material surface. Because of the distortion, if you try to perform head cutting with a normal roller, a flat surface with a thickness that completely corresponds to the particle size of the aggregate will be formed in some places on the surface where the projections are applied, but A flat surface with a predetermined thickness is not formed in other recessed areas.

Depending on the amount of warpage, the coating film thickness at these depressions can be, for example, more than twice that of aggregate granule fleas, resulting in a product that is extremely unsatisfactory in terms of quality and design. On the other hand, some objects to be coated have surfaces that are intentionally curved, and even for such objects, it is not possible to uniformly coat the convex portions over the entire surface by head cutting with a conventional roller as described above. Of course, it cannot be formed.

In addition to decorative laminates that are coated on one side of a parallel plane base material, depending on the application, laminates that have a complex shape such as an L-shaped or triangular cross section may be coated on two or more sides of one side. are widely used.

In the production of decorative laminates with such special shapes, it is preferable to apply the coating to two or more surfaces simultaneously or successively, and to perform head cutting simultaneously or continuously on the same line. This is difficult depending on the device. In view of the above-mentioned current situation, the present invention provides uniform coating of convex portions even when the substrate surface is warped or distorted, or even when the substrate surface is curved, even in the case of a workpiece having a particularly complex shape. The object of the present invention is to provide a coated surface presser that can efficiently produce uneven painted surfaces with a thick film and extremely high commercial value.

For this purpose, a coating surface pressing means consisting of an elastic roller with pressurized gas sealed inside a cylindrical tube or an annular tube rotates the rotational axis of the roller vertically around the conveyance path of the object to be coated. Alternatively, this can be achieved by the painted surface pressing device of the present invention, which is supported in a vertically inclined state. Hereinafter, the present invention will be described in more detail with reference to specific examples with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of a painted surface pressing device according to the present invention, FIG. 2 is a schematic explanatory diagram of its conveyor device, and FIG. 3 is a schematic sectional view of a roller.

The apparatus of the present invention has a compare device 1 for transferring the object A to be coated.

This comparison device 1 is not particularly limited as long as it can securely hold the transferred workpiece A and sufficiently withstand the pressure at the time of head cutting, but for example, the comparison device 1 can be used for a workpiece A having an L-shaped cross section as shown in the figure. In this case, a wicket conveyor may be used. This compare device 1 transmits the rotational power of a motor 2 to a drive track 4 through a chain 3, and a drive chain 6, which is hooked between the drive shaft 4 and a conventional shaft 5, advances, and as a result, the chain 6 is A fixed wicket 7 moves in the direction of the arrow. A head cutting means 8 is located on the side of the comparing device 1.

A roller 9 is supported in this head cutting means 8, and the roller 9 is connected to a rotating shaft 10 in a plane perpendicular to the direction of movement of the comparing device 1 (that is, in the plane of the paper in FIG. 1).
The rotation axis 10 is vertical or oblique. Although the means for supporting the roller 9 is not particularly limited, it may be of a type in which two arms 12, 12' are provided on a support 11 as shown in the figure, and both ends of the rotating shaft 10 of the roller 9 are supported by these arms. The roller 9 is as shown in Fig. 3A.
A rotating shaft 10 is provided at the center of the annular tube,
It is structured like a wheel, so to speak.

Further, FIG. 3 shows another example of the roller 9, in which a rotating shaft 10 is provided at the longitudinal axis of the cylindrical tube. The material constituting the roller 9 is preferably one that is seamless, has solvent resistance, tear resistance, flexibility, and high surface hardness, such as polyurethane, polyethylene, or chloride having a thickness of 0.3 to 10. Examples include vinyl and other sheets. Pressurized gas is sealed inside the lo-fu 9. There are no particular restrictions on the gas, but it may be something like air, and its pressure may be, for example, a gauge pressure of 0.1 to 5k9.
/ Set to ground. Further, in order to prevent the coating material from adhering to the roller surface during head cutting, it is preferable that a means 15 for spraying a mold release agent onto the tube surface is fixedly provided on the support 11 or the like. 16 is a mold release agent tank.

Alternatively, the release agent may be supplied by an Envires sheet interposed between the roller 9 and the coated surface and running in the same direction as the transport direction of the transport means. In the painted surface pressing device of the present invention as described above, head cutting is performed as shown in FIGS. 1 and 2, and particularly as shown in FIGS. 4 and 5. That is, as shown in FIG. 2, for example, the aggregate B and the convex-forming coating are applied to the top and side surfaces of the object A, which has an L-shaped cross section and is transported at a constant speed in the horizontal direction of the arrow by the compare device 1. Material C has been applied, and coating material C is not completely cured. In order to perform a head cut on the side surface of the object to be coated A, as shown in FIGS. 4 and 5, a roller 9 having a vertical rotating shaft 10 is brought close to the side of the wicket 7 of the comparing device 1. This is done by passing the object A to this position and applying pressure from the roller 9 onto the surface of the object. As a result, the convex portion forming coating material C is spread out and the head cut is completed.
The state of the roller 9 at that time is shown in FIG. In this way, even if there is a warp or undulation on the surface of the substrate to be coated, the roller 9 deforms in accordance with the shape and applies almost uniform pressure to the entire surface, ensuring that the head has a thickness corresponding to the grain size of the bone village B. Can be cut. Head cutting of the upper surface of the object to be coated A is also performed by the same machine, and in that case, for example, a roller 9 having a rotating shaft 10 in a substantially horizontal direction is used. If the two rollers mentioned above are installed for one compare device, two rollers can be processed continuously on one line.
Head cutting of the surface can be performed, and head cutting of the coated object having an L-shaped cross section is completed.

The same applies to head cutting on three or more surfaces, and FIG. 6 shows various shapes of the object A to be coated and a schematic explanatory diagram of successive head cutting on several surfaces thereafter.

When applying the apparatus of the present invention, the rotating shaft 10 of the roller 9 is moved appropriately depending on the thickness of the substrate to be coated and the expected amount of warping or waviness, so that the pressurized gas inside the roller is under pressure. It goes without saying that it should be applied appropriately to the surface of the object to be coated.

Further, the rotating shaft 10 of the Rofu 9 may be supported by arms 12, 12' so as to freely rotate, and may be rotated according to the frictional force between the workpiece A and the roller 9 during head cutting. It may be driven and rotated by a motor 13 provided on the motor 10. When the roller 9 is driven to rotate, it is preferable that the circumferential speed of the roller 9 is equal to the advancing speed of the comparing device 1. Furthermore, springs 14 and 14' may be provided in the arms 12 and 12' to absorb excessive force applied to the roller 9 during head cutting. In the device of the present invention,
By making it possible to change the angle of the rotating shaft 10 of the roller 9 in a plane orthogonal to the traveling direction of the comparator device 1 by appropriate means, and setting the angle to an appropriate inclination as necessary, It can be made more effective.

Since the pressing means of the present invention is an elastic roller filled with pressurized gas, unlike the case of a roller that relies on its own weight for pressing force, it can press uniformly even if the coating surface is vertical or inclined. It is.

As described above, according to the present invention, it is possible to obtain an uneven painted surface in which the convex portions are always head-cut to a constant thickness, regardless of the deformation of the base surface of the object, even in the case of an object having a particularly complex shape. .

The apparatus of the present invention can be applied to any application surface containing aggregate of a certain particle size, regardless of the application method. That is,
For example, this effect is also obtained when head-cutting a coating material containing aggregate sprayed onto the surface of a base material in a scattered manner.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the device of the present invention, FIG. 2 is a schematic explanatory diagram of the comparing device, FIG. 3 is a schematic cross-sectional diagram of the roller, and FIGS. 4 and 5 are respectively the rollers. FIG. 6 is a schematic cross-sectional view in the rotational axis direction and horizontal direction, and FIG. 6 is a schematic explanatory diagram of a plurality of continuous head cuts. 1... Compare device, 2, 13... Motor, 3...
...Chain, 4...Drive shaft, 5...
...Driven shaft, 6...Drive chain, 7...
Wicket, 8...Head cutting means, 9...
...Lofu, 10...Rotation axis, 11...
...Strut, 12,12'...Arm, 14,1
4'...Spring, 15...Spray means, 16...
...template agent tank, A...material to be coated, B...
...Aggregate, C...Coating material. Figure 1 Figure 2 Figure 5 Figure 3 Figure 4 Figure 6

Claims (1)

[Scope of Claims] 1. A device for flattening the tops of convex portions of an unevenly coated surface, including an elastic roller having a cylindrical tube or an annular tube filled with pressurized gas. A coating surface pressing device comprising a coating surface pressing means supported around a coating material transfer path with the rotating shaft of the roller being tilted vertically or vertically. 2. The device according to item 1, wherein the inclination angle of the rotation axis of the roller is adjustable. 3. The device according to item 1, wherein the rotating shaft of the roller is supported via a spring. 4. The device according to clause 1, in which the rollers are driven to rotate. 5. The apparatus of paragraph 1, comprising spray means for applying a release agent to the roller.