JPS6017587B2 - Head cutting device for uneven painted surfaces - 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 an object to be coated (so-called head cutting) before the coated surface is completely cured.

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, it is sometimes done directly on the wall surface by workers at construction sites, etc., but recently, from the viewpoint of mass production, it is now possible to form the uneven three-dimensional pattern on the base material surface in advance at the factory. Continuous production has begun. In order to standardize the maximum thickness of the coated surface of this type of IQ frog board, which has an uneven painted surface, and from the standpoint of design, the convex portions of the coated surface are appropriately head-cut to make the height of the convex portions uniform. There are many demands for change. For this purpose, it is advantageous to flatten the convex-forming coating part to a certain thickness by spreading it out with a roller or the like before the convex-forming coating 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 a normal coating material 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, a special coating method was devised that is advantageous for forming a head-cut uneven painted surface.

That is, first, a convexity-forming coating material is applied in spots on the undercoat film layer, in which a large number of aggregates having a certain particle size are evenly fixed on the surface of the decorative board, and then the convexities are head-cut. It's a method. In this case, by applying pressure above a certain value to the convex portion, it is possible to accurately and uniformly cut the head to a thickness corresponding to the particle size of the aggregate. Examples of the aggregate include cinnabar sand, cold water sand, glass beads, quartz powder, plastic powder, etc. In order to fix the aggregate on the substrate surface, aggregate with approximately the same particle size can be used as water-based paint, high solid paint, etc. The method is to mix it with a non-solvent material, an organic solvent-diluted paint, etc. and apply it and dry it, or to apply the bone immediately after applying the paint and dry the paint. The coating material for forming the convex portions may be any one of the three standards, for example, JIS-A6910.
An example is the spraying material specified in . By the way, when head-cutting a convex part coated using this method, there is no problem if the base material surface of the index plate is completely flat, but in reality, the base material surface has many warps. If you try to perform a head cut using a regular roller, a flat surface with a thickness that completely corresponds to the grain size of the aggregate will be formed in some places on the surface where the convex part is applied. However, a flat surface with a predetermined thickness is not formed in other recessed areas.

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

In view of the above-mentioned current situation, the present invention has an extremely high commercial value that allows the coating film thickness of the convex portion to be uniform over the entire surface even when the substrate surface is warped or distorted, or even when the substrate surface is curved. The object of the present invention is to provide a head cutting device capable of producing an uneven painted surface.

Such purposes include; a compare device for layering and transporting objects to be coated; an air supply section for head cutting having a compressed air outlet located above the comparator device and facing downward; and the above-mentioned This is achieved by the head cutting device of the present invention, characterized in that it is equipped with an endless sheet that can run below the compressed air outlet in the same direction as the conveying direction of the compare device. Hereinafter, the present invention will be explained using specific examples with reference to the drawings. FIG. 1 is a perspective view showing an example of a head cutting device according to the present invention.

FIG. 2 is a schematic explanatory diagram of head cutting by the apparatus of the present invention. FIG. 3 is a diagram showing the state of the air supply section and its vicinity when the head is cut, as seen from the direction of movement of the compare device. The device of the present invention is a compare bag straight 13 for transferring the object A to be coated.
have.

The comparing device may be a roller conveyor or a belt comparing device as shown in FIG. 1, and the surface to be coated at night is kept substantially horizontal. An air supply section 5 for head cutting is provided on the compare rhombus 13. This air supply 5 has a downwardly directed compressed air outlet 5'. The shape of the outlet 5' is such that the injected compressed air can maintain sufficient pressure to head-cut the convex portion of the object A on the compare device 13, and
There is no particular limitation as long as it can cover the size (width) of . Preferably, as shown in the drawings, it has an elongated shape that is approximately perpendicular to the traveling direction of the conveyor device 13, and is opened approximately perpendicular to the mounting surface of the compare device 13. On the other hand, by arranging a large number of ordinary air nozzles, it is also possible to form the air supply section 5 having a uniform compressed air jetting effect similar to that described above. The air line may be compressed air from a compressor or the like or air blown by a turbo fan or the like. In the apparatus of the present invention, it is preferable to provide an air exhaust section 6 for recovering and exhausting the air blown out from the compressed air outlet 5' and used for head cutting the convex portions of the coated surface of the workpiece A. . As shown in the figure, the air exhaust section 6 has an air recovery opening 6' near the compressed air outlet 5' of the air supply section 5, and such an air exhaust section 6 can be used for head cutting. Since the compressed air is collected in a timely manner, it does not affect other parts of the equipment or the work environment. In the apparatus of the present invention, a sheet 4 is provided which runs endlessly in the same direction as the conveyance direction of the compare device 13 passing under the air supply section 5 for head cutting.

This may be one in which the drive roller 1, the free roller 14, and the free rotating roller 7 are wound endlessly as shown in FIG. The endless sheet 4 may be any material as long as it has solvent resistance, flexibility, and high surface hardness, such as polyurethane, polyethylene, vinyl chloride, or other resin sheets having a thickness of 0.3 to 5 mm. It is best to tension the sheet 4 with some allowance.
Furthermore, it is preferable that the endless sheet 4 has no seams. In addition, in order to prevent the coating material from adhering to the sheet surface,
A felt sheet 2 is provided on the lower side of the air supply section 5 in contact with the bottom endless sheet surface, thereby separating high boiling point organic solvents such as mineral spirits, water, etc. dripped from the valve 3. The molding agent is applied uniformly to the sheet 4.

Further, a roll brush 9 is provided in contact with the surface of the endless sheet, and a wetting liquid tank 10 is fixedly installed for wetting the brush 9 with a high boiling point organic solvent such as mineral spirits or a mold release agent such as water. preferable. The tank 10 is provided with an overflow pipe 11 and a drain valve 12. 8 is a felt sheet from which the coating material adhering to the sheet is removed.

Note that the means for attaching the shaping agent to the sheet surface is not limited to the above-mentioned means. Power for the device of the invention is provided by a motor 15.

The rotation of the motor 15 is transmitted to the compare bag straight 13,
The compare device 13 transports the object A to be coated in the direction indicated by the arrow in FIG. At the same time, the rotation of the motor 15 is transmitted to the endless sheet driving roller 1 and the roll brush 9, so that the endless sheet 4 runs in the direction of the arrow, and the roll brush 9 rotates in the direction of the arrow to release the mold release agent (wetting liquid). ) is attached to one side of the sheet 4, and if a coating material is attached to the sheet 4, it serves to remove it together with the felt sheet 8. Preferably, the transport speed of the conveyor device 13 and the traveling speed of the endless sheet 4 are made equal. In the head cutting device of the present invention as described above, head cutting is performed as shown in FIG. 2.

That is, the aggregate B and the convex-forming coating material C are applied to the upper surface of the object to be coated, which is transferred at a constant speed in the horizontal direction by the compare device 13, and the coating material C is not completely cured. There is no condition. The object to be coated A is the air supply section 5 for head cutting.
Then, through the endless sheet 4 that runs in the same direction at the same speed as the object A, the convex-forming coating material C is spread out by the air pressure ejected from the compressed air outlet 5' of the air supply section 5. A head cut is performed. The pressure may be determined appropriately depending on the degree of hardening of the convex portions of the painted surface, but it is usually 0.00 mm below atmospheric pressure.
5-10k9/high pressure. The state at that time is shown in FIG. As is clear from this figure, even if the surface of the base material to be coated has warps or undulations, the air from the air supply section for head cutting is pressed down with uniform air pressure in accordance with the shape, and the aggregate B The head can be reliably cut to a thickness corresponding to the grain size. When applying the apparatus of the present invention, the free rotating roller 7, the air supply section 5 for head cutting, and the air exhaust section 6 are moved up and down depending on the thickness of the substrate material to be coated, and set at appropriate positions. It can be fixed with

As described above, according to the present invention, it is possible to obtain an uneven painted surface in which the convex portions are head-cut to a constant thickness regardless of the deformation of the substrate surface of the object to be coated.

The apparatus of the present invention can be applied to any application surface that contains aggregate of approximately constant particle size, regardless of the application method. That is, for example, the present invention has the same effect even when head-cutting a coating material containing aggregate sprayed onto the surface of a base material in a dotted manner.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the apparatus of the present invention. FIG. 2 is a schematic explanatory diagram of head cutting by the apparatus of the present invention. FIG. 3 is a diagram illustrating the state of the air supply section when the head is cut, as seen from the direction of movement of the conveyor device. 1...
... Drive lo-hoo, 2 ... Felt seat, 3 ... Valve, 4 ... Endless seat, 5 ... Air supply section, 5' ... Compressed air outlet, 6. ...
...Air exhaust part, 6'...Air recovery opening □ part, 7...Free rotating roller, 8...Felt sheet, 9...Roll brush, 10.・・・・・・
・Wetting liquid tank, 11... Overflow pipe, 12...
Drain valve, 13... Compare device, 14
・・・・・・Free Roofu, 15・・・・Motor,
A: Material to be coated, B: Aggregate, C:
・Painting material. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. In a device for head-cutting the convex portions of an object to be coated which has been coated in an uneven manner; a conveyor device for placing and transporting the object to be coated; located above the conveyor device; and an air supply section for a headcut having a compressed air outlet facing downward; and an endless sheet that can run below the compressed air outlet in the same direction as the conveying direction of the conveyor device. A head cutting device for uneven painted surfaces. 2. The device according to item 1, further comprising an air exhaust section having an air recovery opening adjacent to the compressed air outlet of the head cut air supply section. 3. Item 1 or 2, characterized in that a means for attaching a mold release agent to the surface of the endless sheet is provided.
Section equipment.