JPH0645132B2 - Surface patterning method for fiber reinforced cement concrete board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) In the present invention, when a fiber reinforced cement concrete board is manufactured, the pressure roller 1 to 3/3 is applied while pressing an impression cylinder roller having an uneven pattern as shown in FIG. The present invention relates to a patterning method for a fiber-reinforced cement concrete plate, which does not sag or chip, and does not need to be repaired by rotating it four times.

(Prior Art and Problems Thereof) Recently, the phenomenon of carbonation of concrete due to acid rain has occurred and damage to the concrete can be seen. Therefore, the outer layer precast cement concrete plate needs a surface coating with a resin coating film or the like. When the outer layer precast cement concrete board is coated on the surface, temporary scaffolding is required to do it on site. Since the building is going to be high-rise, the cost of scaffolding is high and the number of workers at high places is short,
Outer layer precast cement concrete board is under pressure at the time when it is necessary to process the resin coating film in the factory. Therefore, it was considered that a pattern was applied to the surface of the cement concrete plate to facilitate on-site painting, but the patterning processing method was to use the pattern type in the state of pressing the disc vertically to the surface layer of the concrete plate. It was applied with pressure to process uneven patterning. In such a method, when the pattern mold is removed, the uneven pattern on the surface layer of the concrete plate is often partly attached to the surface of the pattern mold and chipped, which increases the number of steps to repair the chipped part, which is troublesome. There is. Further, if the cement concrete in the surface layer is slightly high in water content and is soft, the pattern of the pattern is released and the surface pattern collapses so that a clear uneven pattern cannot be formed, and there are various problems such as an increase in the number of processes to be redone.

(Object of the Invention) The present invention has been made in view of the drawbacks of the conventional example,
The purpose of this process is to make use of the rotary method that applies the principle of the special material and blending and crank motion, so that the pattern of the surface layer is uniform and clear, and there is no unevenness or breakage. The purpose is to provide.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a method for processing a surface pattern of a manufactured cement concrete plate of the present invention is one-way operation of a mold 2 containing a metal mesh or a fiber mesh 3. The fiber-reinforced cement concrete 5 is poured into the mold 2 and placed in the continuous heating curing primary chamber 8 to forcibly promote breathing, and then the breathing is forcedly promoted to the continuous heating curing primary chamber. Remove the mold 2 from 8 to remove the surface water 11 of the fiber-reinforced cement concrete plate 6 causing the breathing, and then put it in the continuous heating curing secondary chamber 15 to complete the breathing, and finally The mold 2 is taken out from the continuous heating curing secondary chamber 15, and the rotating impression cylinder roller 17 is pressed onto the surface layer 7 of the concrete plate 6 of the mold 2 which can pass below, and is stretched on the impression cylinder roller 17. The pattern of the surface of the uneven pattern with hard resin prototype mat 20 that is transferred to the surface of the fiber-reinforced cement plate 6.

The technical means called; is adopted.

(Function) In the conventional uneven patterning method, the unevenness patterning method is performed by pressing the surface layer of the fiber-reinforced cement concrete plate with a pattern type in a state where the disc is pushed vertically and vertically, so the pattern uniformity However, there were problems with quality such as sharpness, loss, breakage, etc., but due to the above-mentioned technical means, it was possible to improve the quality by adopting a simple material, improved composition, and a patterning method different from conventional ones. At the same time, it is possible to continuously mass-produce the uneven pattern processing with one resin prototype mat.

(Example) Hereinafter, one example of the surface patterning method of the fiber-reinforced cement concrete board according to the present invention will be described with reference to FIGS. 1 and 2.

We decided to use carbon fiber with a fiber length of 4.0 mm as the reinforcing fiber, and after examining the amount of the fiber, worker bilility, and the amount of the dispersant added, we conducted a compounding test of the carbon fiber reinforced cement concrete, bending and compressing it. It was confirmed by experiments that the strength satisfies the design conditions and that the optimum composition for the uneven patterning method of the carbon fiber reinforced cement concrete plate is as shown in Table 1.

Next, FIG. 1 is a drawing showing a manufacturing process of a fiber reinforced cement concrete plate according to the present invention by using the carbon fiber reinforced cement concrete having the optimum mixture, and FIG. 2 is a drawing of the uneven patterning processing method. Is.

Hereinafter, the details of the manufacturing process will be described. Next, a device for processing a fiber-reinforced cement concrete plate with a concavo-convex pattern by a rotary system will be described. From FIG. 1, the mold 2 containing the metal mesh or the fiber mesh 3 is continuously placed on the belt conveyor 1, and the fiber reinforced cement concrete 5 having a composition most suitable for the uneven processing is formed on the mold 2. Is injected with a pump having a flexible injection pipe 4, and a fiber reinforced cement concrete 5 is densely filled in the form 2 by applying a vibrator. At this time, the mesh 3 is filled with the fiber reinforced cement concrete 5
Set to be placed in the middle layer. After that, the surface layer 7 of the fiber reinforced cement concrete plate 6 is roughly leveled, and then the upper heating wire 9 is used to forcibly promote breathing.
Put in the continuous heating curing primary chamber 8 marked with. After the breathing is forcibly promoted, it is temporarily taken out from the continuous heating curing primary chamber 8 and the surface water 11 of the fiber-reinforced cement concrete plate 6 causing the breathing is absorbed and removed by the mat 12 attached to the water supplier 14. . The mat 12 contains a water absorbent resin powder agent 13. The water supply device 14 is moved up and down as shown in the figure to bring the mat 12 into contact with the surface of the concrete plate 6. Then, the surface layer 7 of the fiber-reinforced cement concrete plate 6 is carefully finished and smoothed with a trowel, and then placed in the continuous heating curing secondary chamber 15. When the breathing stops, the continuous heating and curing secondary chamber 15 is taken out and the unevenness patterning process is started. It is important to control the surface compressive strength of the fiber-reinforced cement concrete plate 6 in the process of forming the uneven pattern to 1 to 3 Kg / cm ² .

Next, a processing method with an uneven pattern will be described. Place the formwork 2 on the conveyor 16 with a rotary machine that is driven intermittently,
The form 2 is conveyed to a predetermined position. During this time, the impression roller
17 is pulled upward by a lifting cylinder 22 so that the formwork 2 can pass through. The impression cylinder roller 17 is rotated by a crank cam 24 through a crankshaft 23 in a range of 1 to 3/4 rotation. The rotation amount of the impression roller 17 is 1 to 3/4 rotation because the floor height is somewhat different depending on the type of the building, so the rotation amount is adjusted according to the length of the fiber reinforced cement concrete plate 6. This is because it is selected appropriately. The hard resin prototype mat 20 with an uneven pattern, which is stretched with an adhesive on the impression cylinder roller 17, is a mold made from a raw wood or a machine-engraved plate, and various uneven patterns are formed on the surface of the fiber-reinforced cement plate 6. Attached. This prototype mat 20 is formed on the outer periphery of the impression roller 17 in the illustrated embodiment.
Although it is wound at an angle of °, it is not limited to this angle, and it may be smaller than this angle, or conversely, may be wound around the entire circumference. FIG. 2 illustrates the principle of the surface patterning method of the carbon fiber reinforced cement concrete plate 6 of the present invention.

The uneven surface patterning process is started when the even surface layer 7 of the carbon fiber reinforced cement concrete plate 6 has no surface bleeding and the surface compressive strength is in the range of 1 to ³ kg / cm ^2. The principle mat 20 having an uneven pattern of a hard resin stretched with an adhesive in the circumferential direction of 1 to 3 is applied to the boundary between the formwork 2 and the concrete plate 6,
Rotate for patterning. The impression cylinder roller 17 reciprocates on the stopped mold 2 by the crank cam 24 to form an uneven pattern on the surface of the concrete plate 6 in the mold 2, but the formation of the uneven pattern is completed. Then, the conveyor 16 with a rotary machine is operated to activate the concrete board 6
Is moved to the right in the figure, and is transferred to the steam curing chamber (not shown) in the next step. When the patterning is completed, the impression cylinder roller 17 is pulled up by the elevating cylinder 22 and stands by before the next formwork 2 comes. When the patterning is repeated in this way, the cement paste gradually accumulates in the valleys of the uneven pattern of the prototype mat 20, and it becomes difficult to obtain a clear uneven pattern, so wash it with water once every few times and spray the release agent. To do. In this way, after the clear concave and convex pattern is processed, the concrete plate 6 having a prescribed strength is obtained by steam curing, and the mold 2 is demolded. The patterned surface of the fiber-reinforced cement concrete board formed in this way is subjected to a resin coating work at the factory, and the finished product is delivered to the construction site in a form close to the finished product.

(Effect of the invention) Since the surface patterning method of the fiber-reinforced cement concrete plate according to the present invention is the above-mentioned method, the fiber-reinforced cement concrete plate with the uneven pattern is removed from the mold in the factory and then The resin coating work of can be performed. This plank building does not require temporary scaffolding and the number of workers in high places is not necessary for local construction, so after full-scale prefabricated exterior plank can be produced in the factory, send out close to finished products to the construction site. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a process diagram of an embodiment showing a filling process of cement concrete and a manufacturing process up to surface patterning processing of the fiber-reinforced cement concrete of the present invention, and FIG. 2 is a surface pattern of the fiber-reinforced cement concrete plate of the present invention. The schematic front view of one Example of the attachment processing method is shown. 1 …… Belt conveyor 2 …… Formwork 3 …… Metal mesh or fiber mesh 4 …… Flexible cement concrete injection pipe 5 …… Carbon fiber reinforced cement concrete 6 …… Carbon fiber reinforced cement concrete board 7 …… Concrete board Surface layer 8: Heating curing primary chamber, 9: Heating wire 10: Curing sheet curtain, 11: Bridging water 12: Water absorbing mat, 13: Water supply resin 14: Water absorbing machine, 15: Heating curing Secondary chamber 16 …… Conveyor with rotary machine 17 …… Impression roller 19 …… Cement concrete plate with rugged pattern 20 …… Prototype hard resin mat with rugged pattern 21 …… Carbon fiber, 22 …… Elevating cylinder 23 …… Crank shaft, 24 ...... Crank cam

Claims (1)

[Claims] 1. A formwork containing a metal mesh or a fiber mesh is conveyed in one direction, fiber-reinforced cement concrete is poured into the formwork, and then placed in a continuous heating curing primary chamber in order to forcibly promote breathing. Then, after the breathing is forcedly promoted, the form is taken out from the continuous heating curing primary chamber to remove the surface water of the fiber-reinforced cement concrete plate causing the breathing, and then the continuous heating curing 2 Put it in the next chamber to complete the breathing, and finally take out the mold from the continuous heating and curing secondary chamber and press the rotating impression cylinder roller against the surface layer of the cement plate of the mold that can pass underneath. The surface pattern of the fiber-reinforced cement concrete board is characterized in that the surface pattern of the stretched hard resin prototype mat is transferred to the surface of the fiber-reinforced cement board. With processing method.