JPH0140666B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a coating device.

Cement roof tiles have traditionally been made thicker and have a surface that alternates between corrugated and flat parts in order to give a sense of grandeur and grandeur. In order to impart aesthetic appeal and durability, an inorganic coloring composition (paint) is applied to the surface of a cement tile excipient and cured during the manufacturing stage of the cement tile.

This painting is done by applying paint to the cement tile shaped body using a mortar gun or roll brush, but when using a mortar gun, there is a lot of paint scattering and loss, and in addition, the mortar gun is easily visible. Because of the problem of easy clogging, a method using a roll brush is generally adopted industrially. When painting with a roll brush in this way, the paint is sprayed off by the repulsive force of the roll brush bristles that bend against the flat baffle plate, so the paint is applied in the direction of the repulsion of the bristles. In other words, it is blown off toward the surface of the shaped body for cement tiles. In this case, uniform coating can be achieved if the surface of the shaped body is flat.
However, if the surface of the shaped body has a shape in which corrugated parts and flat parts appear alternately, the surface area of the shaped body per unit length of the baffle plate is smaller than that of the flat part. Compared to the flat part, the slope part of the corrugated part is larger, so even if the same amount of paint is splashed, the amount of paint per unit area of the slope part of the corrugated part is smaller than that of the flat part, achieving uniform coating. For this reason, it is necessary to control the amount of paint supplied to the roll brush according to the shape of the corrugated part, but in cases where the viscosity of the paint is high, etc. As a result, there was a problem that uniform coating could not be achieved.

The present invention was made in view of the above circumstances, and includes a roll brush having a large number of bristles on its outer peripheral surface, a driving means for rotationally driving the roll brush, and a drive means for rotating the roll brush from between the rolls. a pair of supply rolls that rotate in opposite directions so as to flow down a fixed amount of paint; and a baffle plate that is positioned parallel to the axial direction of the roll brush and is disposed so that its lower edge contacts the bristles of the roll brush. A coating device that uses the repulsive force of the bristles of the roll brush that bend against the tip of the baffle plate as the roll brush rotates to spray paint supplied to the roll brush onto the object to be coated. One of the pair of supply rolls has a groove formed in the circumferential direction in a portion corresponding to the slope of the curved part on the surface of the object to be coated, and the other roll has a groove formed in the circumferential direction. The rotational speed of the columnar roll without grooves is set to be faster than the rotational speed of the roll with grooves. The gist of the invention is a coating device characterized by the following.

By doing this, the amount of paint splashed on the sloped portion of the corrugated portion is increased, so the amount of paint per unit area is almost the same as that on the flat portion, and uniform coating can be achieved. Even when the viscosity of the paint is high, a simple cylindrical roll without grooves rotates faster than a grooved roll.
The paint is carried down over the entire surface of the grooveless roll that comes into contact with the paint, and the paint flows down smoothly, making it possible to achieve uniform coating.

Next, the present invention will be explained in detail based on examples.

FIG. 1 is a side view of one embodiment of the present invention.
In the figure, reference numeral 1 denotes a roll brush, and this roll brush 1 is constructed by having a large number of bristles uniformly planted radially around the circumferential surface of a roll 2. A cover 5 is attached to the outer periphery of the roll brush 1, in which an upper paint inflow part 3 and a side paint projection part 4 are formed. Further, the roll brush 1 described above is an object to be coated. It is disposed perpendicular to the transport direction (direction of arrow A) of the cement tile shaped body (Fig. 2) 6 having corrugated portions 6a and flat portions 6b alternately on its surface, and is moved by a motor (not shown). It's supposed to rotate. A guide plate 9 is provided in the upper paint inflow portion 3 of the cover 5, and above the guide plate 9,
A pair of supply rolls 7 and 8 are rotated in opposite directions with their axial directions aligned with the axial direction of the roll brush 1 and with a constant gap maintained so that the paint 10 flows down from between the rolls 7 and 8. It is set in. A paint tank 11 that supplies paint 10 between the supply rolls 7 and 8 is provided above the pair of supply brushes 7 and 8 . A baffle plate 12 is provided at the upper edge of the side paint projection part 4 of the cover 5 (the baffle plate 12 is parallel to the roll brush 1), and its lower edge is oriented in the axial direction of the roll brush 1. It is being The tips of the bristles of the roll brush 1 do not touch this lower edge, and the paint 10 that has flowed down onto the roll brush 1 is splashed off toward the surface of the cement tile forming body 6 due to its repulsive force. It's summery. Of the pair of supply rolls 7 and 8, one roll 7 has a circular shape as shown in FIG. 3 (in FIG. 3, one roll 7 is drawn below the other roll 8 for convenience of illustration). Although it is columnar, the other roll 8 has a corrugated portion 6a of the cement tile shaped body 6.
A groove 13 is formed in the circumferential direction in a part corresponding to the slope part of the groove 13, and the gap between the rolls 7 and 8 becomes large in this part, thereby making the slope part of the corrugated part 6a of the cement tile shaped body 6 The amount of paint flowing down from the flat portion 6b is set to be larger than that from the flat portion 6b, and the amount of paint is set to be almost uniform throughout. In this case, the rotation speed of one roll 7 is equal to the rotation speed of the other roll 8.
The rotation speed is set faster than the rotation speed of one roll 7, and the paint 10 supplied from the paint tank 11 is
After being transferred to the roller brush 1, the image is transferred onto the roll brush 1. In FIG. 1, 14 is a paint supply pipe, 15 is a paint layer on the surface of the cement tile shaped body 6, 16 is a receiving mold, and 17 is a conveyor for transporting the receiving mold 16.

With this configuration, the paint 10 supplied from the paint tank 11 to the pair of supply rolls 7 and 8
However, from between the pair of supply rolls 7 and 8, the amount of coating per unit area on the slope portion and flat portion 6b of the corrugated portion 6a of the cement tile shaped body 6 is adjusted to be equal, and the amount is applied onto the roll brush 1. Flow down.
Therefore, the surface of the cement tile shaped body 6 is coated with the same state by the roll brush 1, and uniform coating is achieved.

Next, an example of coating a cement tile shaped body using the apparatus of the above embodiment will be described. As a compound for manufacturing excipients for cement tiles,
Using a mixture of 95 parts by weight of ordinary cement, 5 parts by weight of pigment, and 50 parts by weight of water, the second
A shaped body for cement tiles with the shape shown in the figure was created. The surface of this cement tile shaped body was coated with paint using the coating apparatus shown in Figure 1 so that the paint thickness was 0.4 mm. At this time, roll brush 1
The diameter of the rolls 7 and 8 was set to 300 mm, and the diameter of the pair of rolls 7 and 8 was set to 100 mm. Then, the rotation speed of one of the pair of supply rolls 7 and 8 is set to
The rotation speed of the other roll (grooved) 8 was set to 10 rpm. As a result of painting in this way, the slopes of the corrugated parts of the shaped body for cement tiles also
The flat areas were also coated almost uniformly with a thickness of 0.35 to 0.40 mm. In this case, there were extremely few painting mistakes.

In addition, in the apparatus of the above embodiment, by changing the interval or rotational speed of the pair of supply rolls 7 and 8, it is possible to change the amount of paint flowing down to the roll brush 1, thereby changing the coating thickness of the paint. .

Since the coating apparatus of the present invention is configured as described above, it is possible to prevent problems such as a large amount of paint scattering loss and clogging of the mortar gun when painting objects that have corrugations or valleys on the surface. without any problems,
Moreover, even when the viscosity of the paint is high, uniform surface coating can be achieved.

[Brief explanation of drawings]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a cutaway perspective view of a cement tile forming body, and Fig. 3 is a front view showing the relationship between a supply roll, a roll brush, and a cement tile forming body. be. DESCRIPTION OF SYMBOLS 1...Roll brush, 2...Cover, 6...Cement tile excipient, 6a...Corrugated part, 6b...Flat part, 7, 8...Supply roll, 10...Paint, 1
2... Baffle plate, 13... Groove.

Claims (1)

[Claims] 1. A roll brush having a large number of bristles on its outer circumferential surface, a driving means for rotationally driving this roll brush, and a drive means that rotates in opposite directions so as to cause a fixed amount of paint to flow down from between the rolls to the roll brush. a pair of supply rolls, and a baffle plate positioned parallel to the axial direction of the roll brush and disposed so that its lower edge touches the bristles of the roll brush, and the tip of the baffle plate is provided by rotation of the roll brush. A coating device that uses the repulsive force of the bristles of the roll brush that bend when hit by the brush to spray the paint supplied to the roll brush onto the object to be coated.One roll of a pair of supply rolls However, a groove is formed in the circumferential direction of the part corresponding to the slope part of the curved part on the surface of the object to be coated, and the other roll is simply cylindrical, and the groove is not formed. A coating device characterized in that the rotational speed of the roll is set to be faster than the rotational speed of the roll on which the grooves are formed.