JP5133966B2 - How to paint porous plates - Google Patents

Description

  The present invention relates to a method for coating a porous plate, and more particularly to a method for coating a porous plate including a step of coating the back surface of a porous plate (for example, lightweight cellular concrete) having irregularities on the surface.

  Conventionally, as the outer wall of a building, there were many outer walls to be constructed at the construction site, such as a soil wall coated with soil, but recently, the outer wall material was produced at a factory etc., and this outer wall material was used as the outer wall of the building. The outer wall attached to the part has become widespread for the reason that it can be constructed quickly, uniformly, and with good appearance.

  As the outer wall material produced in the factory, ALC (Autoclaved Light-weight Concrete), precast concrete, hard wood chip cement and the like, which are porous plates, are often used.

  In particular, an outer wall material made of ALC (hereinafter referred to as an ALC plate) is easy to construct because of its light weight, and is used for many outer wall materials. Next, an ALC plate according to a conventional example will be described with reference to the drawings.

  As shown in FIG. 3, the first main surface, that is, the surface of the ALC plate 10 is formed with a pattern composed of deeply carved concave portions 10 a and convex portions 10 b. The pattern composed of the concave portions 10a and the convex portions 10b relates to a design for improving the appearance when the ALC plate 10 is used as an outer wall material for a house, for example. On the other hand, the second main surface, that is, the back surface of the ALC plate 10 is a flat surface.

  Furthermore, in order to improve the appearance and waterproofness of the front and back surfaces of the ALC plate 10, both surfaces of the ALC plate 10 are painted. Conventionally known methods for coating are brush coating, spray coating, roll coater, flow coater, dipping, and the like. Here, the roll coater has a coating roller to which a paint is applied and a transport roller for transporting and supporting the ALC plate 10, and the ALC plate 10 is sandwiched between the coating roller and the transport roller. It is a coating apparatus which inserts it like this and paints the main surface of ALC board 10 by rotation of the above-mentioned both rollers.

  Next, a method for coating the ALC plate 10 according to a conventional example using a roll coater will be described with reference to the drawings.

  First, the surface of the ALC plate 10 is painted. At that time, first, the concave portion 10a on the surface of the ALC plate 10 is painted by, for example, spray coating. Thereafter, the surface of the ALC plate 10 is painted by the roll coater 30. That is, the ALC plate 10 is inserted between the coating roller 31 and the transporting roller 33 so that the convex portion 10 b on the surface of the ALC plate 10 is in contact with the coating roller 31 and the back surface thereof is in contact with the transporting roller 33. The Here, the paint is dropped on the vicinity of the contact portion between the painting roller 31 and the doctor roller 32 in contact with the painting roller 31. Then, at the same time as the ALC plate 10 is moved by the rotation of the transport roller 33, the surface thereof is coated.

  Next, the back surface of the ALC plate 10 is painted. At that time, as shown in FIG. 4, the back surface of the ALC plate 10 is in contact with the coating roller 31, and the surface (the main surface formed with the concave portions 10 a and the convex portions 10 b) is in contact with the transport roller 33. The ALC plate 10 is inserted between the coating roller 31 and the transport roller 33. Here, the paint is dropped on the vicinity of the contact portion between the painting roller 31 and the doctor roller 32 in contact with the painting roller 31. The ALC plate 10 is moved by the rotation of the transport roller 33, and at the same time, the back surface is painted.

  In addition, as a related technical document, the following patent document 1 is mentioned, for example.

JP 2002-126594 A

  However, as shown in FIG. 4, when the back surface of the ALC plate 10 is painted, the surface of the ALC plate 10 having the recesses 10 a and the protrusions 10 b is in contact with the transfer roller 33. When the ALC plate 10 moves, the ALC plate 10 moves while being supported in an unstable state (that is, a state accompanied by fibrillation or rattling according to the concave portion 10a and the convex portion 10b). In other words, the back surface of the ALC plate 10 comes into contact with the coating roller 31 in an unstable state, and smearing occurs in the coating of the back surface of the ALC plate 10. Due to this smear, the appearance of the back surface of the ALC plate 10 deteriorates, and the waterproof property of the back surface deteriorates.

In the method for coating a porous plate of the present invention, the first main surface has a concave portion and a convex portion, and the second main surface has a flat surface, and both the main surfaces have a flat surface. A plate and a conveyance belt that rotates in conjunction with the conveyance roller are prepared, the support plate is placed below the conveyance belt so as to be in contact with the conveyance belt, and the first main surface of the porous plate is placed on the support plate The second main surface of the porous plate is coated with a coating roller while the porous plate is moved by the rotation of the conveyor belt. .

In the method for coating a porous plate of the present invention, the first main surface has a concave portion and a convex portion, and the second main surface is a flat plate, and both main surfaces are flat. A support plate, a transport belt rotating in conjunction with the transport roller, a first roller, and a second roller, and placing the support plate below the transport belt so as to be in contact with the transport belt. While the first roller and the second roller are rotated in a predetermined rotation direction, the coating material is dropped at a place where the first roller and the second roller are in contact with each other, and the first main surface of the porous plate is supported. The second main surface of the porous plate is coated while the porous plate is moved by the rotation of the conveying belt while being supported on the surface of the conveying belt which is flat on the plate.

  Moreover, the coating method of the porous board of this invention includes the process of coating the 1st main surface of a porous board before the process of coating the 2nd main surface of a porous board in the said process. It is characterized by.

  Moreover, the coating method of the porous board of this invention is characterized by the said process WHEREIN: The recessed part and convex part which the 1st main surface of a porous board has are the unevenness | corrugation which concerns on a design.

  The porous plate coating method of the present invention is characterized in that, in the above step, the porous plate is lightweight cellular concrete.

  The porous plate coating method of the present invention is characterized in that, in the above step, the support plate is made of an iron plate.

  According to the present invention, the back surface of the porous plate, which is the surface to be coated, comes into contact with the coating roller in a stable state, and the occurrence of smear that occurs during coating is suppressed as much as possible.

  In addition, according to the present invention, it is possible to suppress the deterioration of the appearance and waterproofness due to the smears on the back surface of the porous plate only by using the support plate together with the porous plate. As a result, an existing roll coater can be used without requiring a design change or new introduction of a roll coater, which is a coating apparatus, so that an increase in coating cost can be suppressed as much as possible.

It is a figure explaining the coating method of the porous board which concerns on a reference example . It is a figure explaining the coating method of the porous board which concerns on embodiment of this invention. It is a figure explaining the coating method of the porous board which concerns on a prior art example. It is a figure explaining the coating method of the porous board which concerns on a prior art example.

Next, a porous plate coating method according to a reference example will be described with reference to the drawings. In the porous plate coating method according to the reference example, it is assumed that the porous plate to be coated is, for example, an ALC plate. As in the ALC plate shown in FIG. 3, the ALC plate has a concave portion 10a and a convex portion 10b formed on the surface that is the first main surface. The concave portion 10a and the convex portion 10b are, for example, an uneven pattern according to a design that can improve the appearance of the ALC plate.

Further, it is assumed that the surface of the ALC plate 10 on which the concave portions 10a and the convex portions 10b are formed has already been painted. That is, the following reference example mainly explains a method for coating the back surface of the ALC plate 10.

Next, the process of painting the back surface of the ALC plate 10 will be described with reference to FIG. FIG. 1 is a diagram illustrating a process of painting the back surface of the ALC plate 10 according to the reference example . In this step, a support plate 20 having both main surfaces made flat is prepared. The support plate 20 is preferably, for example, an iron plate formed as a horizontal plate without distortion. Moreover, the roll coater 30 which is a coating apparatus is prepared.

  The roll coater 30 is, for example, the same as the roll coater 30 shown in FIG. 4 and has the following configuration. The same components as those shown in FIG. 4 will be described with the same reference numerals. That is, the roll coater 30 includes a coating roller 31 (first roller) that can come into contact with a surface to be coated (that is, the ALC plate 10), and a doctor roller 32 (second roller) in contact with the coating roller 31. And a transport roller 33 (third roller) facing the coating roller 31 at a predetermined interval below the coating roller 31.

  Here, the doctor roller 32 is connected to a driving unit (not shown) (for example, a motor) and is rotated by the driving unit. Further, since the coating roller 31 is in contact with the doctor roller 32, it rotates according to the rotation of the doctor roller 32. The transport roller 33 is connected to, for example, a driving unit 35 via a belt 34 (or directly), and is rotated by the driving unit 35.

  First, the ALC plate 10 is placed on the support plate 20 so that the surface of the ALC plate 10 (the surface on which the concave portions 10 a and the convex portions 10 b are formed) is in contact with the support plate 20.

  Next, the coating roller 31 and the doctor roller 32 are rotated while the coating roller 31, the doctor roller 32, and the transport roller 33 of the roll coater 30 are rotated in predetermined rotation directions by a driving unit and a driving unit 35 (not shown). The paint is dropped on the vicinity of the contact area.

  Next, the ALC plate 10 is placed on the support plate 20 so that the back surface (main surface consisting of a plane) is in contact with the coating roller 31 and the support plate 20 (main surface consisting of a plane) is in contact with the transport roller 33. The placed ALC plate 10 is simultaneously inserted between the coating roller 31 and the transport roller 33 together with the support plate 20. Then, the ALC plate 10 and the support plate 20 are moved by the rotation of the transport roller 33 and the back surface of the ALC plate 10 in contact with the coating roller 31 is painted.

  At that time, the surface of the ALC plate 10 having the concave portions 10 a and the convex portions 10 b does not contact the transport roller 33, but instead, the support plate 20 contacts the transport roller 33. That is, the transport roller 33 is in contact with the main surface of the support plate 20 that is a flat surface.

  Therefore, the ALC plate 10 placed on the support plate 20 is in a stable state (that is, the concave portion 10a as seen in the conventional example) when moving on the transport roller 33 when the back surface is painted. And a state that is not accompanied by fibrillation or rattling according to the convex portion 10b). In other words, the back surface of the ALC plate 10 that is the surface to be coated comes into contact with the coating roller 31 in a stable state, and the occurrence of smears occurring when the back surface of the ALC plate 10 is painted is suppressed as much as possible. As a result, the deterioration of the appearance due to the smear on the back surface of the ALC plate 10 and the deterioration of the waterproof property are suppressed as much as possible.

  Further, it is possible to suppress the deterioration of the appearance and waterproofness due to the smears on the back surface of the ALC plate 10 only by using the support plate together with the ALC plate 10. As a result, since the existing roll coater 30 can be used without requiring a design change or new introduction of the roll coater 30 as a coating apparatus, an increase in coating cost can be suppressed as much as possible.

In the above-described reference example , immediately before the process of coating the back surface of the ALC plate 10 is started, if necessary, a process of removing dirt attached to the back surface by brushing or air blowing may be provided. Good. Moreover, after the process of coating the back surface of the ALC plate 10 is completed, a step of drying the back surface of the ALC plate 10 may be provided as necessary.

Moreover, in the reference example mentioned above, although the surface of the ALC board 10 in which the recessed part 10a and the convex part 10b were formed shall already be painted, the coating process is a part, for example, as shown next. A roll coater 30 may be used. Thereby, since the same roll coater 30 can be used for the coating of both the front and back main surfaces of the ALC plate 10, it is possible to suppress the increase in the coating cost as much as possible.

  In the step of coating the surface of the ALC plate 10, first, the concave portion 10a on the surface of the ALC plate 10 is coated by, for example, spray coating. Thereafter, the convex portion 10 b formed on the surface of the ALC plate 10 is painted by the roll coater 30. At that time, the ALC plate 10 is such that the convex portion 10 b formed on the surface of the ALC plate 10 is in contact with the coating roller 31, and the back surface of the flat ALC plate 10 is in contact with the transport roller 33. 31 and the transfer roller 33. Here, the paint is dropped on the vicinity of the contact portion between the painting roller 31 and the doctor roller 32 in contact with the painting roller 31. And while the ALC board 10 moves by rotation of the conveyance roller 33, the convex part 10b of the surface is painted. Thus, after the coating of the surface of the ALC plate 10 is completed, the surface of the ALC plate 10 is dried as necessary.

  The step of painting and drying the surface of the ALC plate 10 does not necessarily have to be performed before the step of painting the back surface of the ALC plate 10. That is, the step of painting and drying the surface of the ALC plate 10 may be performed after the step of painting the back surface of the ALC plate 10.

Moreover, although the coating method of the ALC board 10 which concerns on a reference example was applied to the ALC board 10 in which the recessed part 10a and the convex part 10b were formed in the one main surface, ie, a back surface, this invention is not limited to this. That is, the present invention may be applied to a porous plate (for example, an ALC plate) in which concave portions 10a and convex portions 10b are formed on both main surfaces. In this case, in any painting process of any main surface of the porous plate, the porous plate may be placed on the support plate 20 for painting.

Moreover, although the support plate 20 used in the reference example is made of an iron plate, the present invention is not limited to this. That is, the unevenness of the ALC plate 10 in contact with the main surface of the support plate is not reflected on the main surface of the support plate on the side in contact with the transport roller 33, and the main surface of the support plate in contact with the transport roller 33 is always flat or If it becomes a substantially flat surface, you may use the support plate which consists of other than an iron plate. For example, a support plate having elasticity (having a predetermined viscosity coefficient) or the like may be used.

Next, a roll coater according to an embodiment of the present invention will be described. As shown in FIG. 2, the roll coater 30 in the present embodiment includes a belt conveyor type transport unit 40 including a plurality of transport rollers 43 and a transport belt 44 interlocked therewith .
In this case, the support plate 20 is placed below the conveyor belt 44. Here, the support plate 20 is placed so as to be in contact with the transport belt 44 and to prevent friction with the transport belt 44 as much as possible. Then, the conveyance belt 44 rotates in conjunction with the conveyance roller 43, so that the ALC plate 10 moves while being supported on the surface of the conveyance belt 44 that is flat on the support plate 20. Thereby, the surface to be coated of the ALC plate 10 is in contact with the coating roller 31 in a stable state. Therefore, the occurrence of smears that occur during the coating of the ALC plate 10 is suppressed as much as possible.

  Moreover, although the to-be-coated body used as the object of application of this embodiment was the ALC board 10 which is a porous board, this invention is not limited to this, A structure similar to the said ALC board 10 (one or both) If the main surface is a plate formed with concave portions 10a and convex portions 10b and is made of a material that can be painted by a roll coater), it can be applied to an object to be coated other than an ALC plate. Also good.

DESCRIPTION OF SYMBOLS 10 ALC board 10a Concave part 10b Convex part 20 Support plate 30 Roll coater 31 Coating roller 32 Doctor roller 33,43 Conveyance roller 34 Belt 35 Drive apparatus 40 Conveyance part 44 Conveyance belt

Claims (6)

The first main surface has a concave portion and a convex portion, and the second main surface is a porous plate having a flat surface, a support plate having both main surfaces formed by a flat surface, and rotating in conjunction with the transport roller. Prepare a conveyor belt,
Placing the support plate below the conveyor belt so as to contact the conveyor belt;
While supporting the first main surface of the porous plate on the surface of the transport belt that is flat on the support plate, the porous plate is moved by the rotation of the transport belt, and the porous plate is moved. A method for coating a porous plate, wherein the second main surface of the plate is coated with a roller for painting. The first main surface has a concave portion and a convex portion, and the second main surface is a porous plate having a flat surface, a support plate having both main surfaces formed by a flat surface, and rotating in conjunction with the transport roller. Preparing a conveyor belt, a first roller, and a second roller;
Placing the support plate below the conveyor belt so as to contact the conveyor belt;
While rotating the first roller and the second roller in a predetermined rotation direction, the paint is dropped at a position where the first roller and the second roller are in contact, and the first of the porous plate The second main surface of the porous plate is coated while supporting the main surface on the surface of the transport belt that is flat on the support plate and moving the porous plate by the rotation of the transport belt. A method for painting a porous plate, characterized by: Before the step of painting the second main surface of the porous plate,
The method for coating a porous plate according to claim 1, further comprising a step of coating the first main surface of the porous plate. Concave and convex portions having a first major surface of the porous plate, painted porous plate according to any one of claims 1, 2, 3, characterized in that the irregularities of the design Method.   The said porous board is lightweight cellular concrete, The coating method of the porous board of any one of Claim 1, 2, 3, 4 characterized by the above-mentioned.   The method of coating a porous plate according to any one of claims 1, 2, 3, 4, and 5, wherein the support plate is made of an iron plate.

Images