JP3139901B2 - Method and apparatus for producing decorative veneer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative veneer and an apparatus therefor.

[0002]

2. Description of the Related Art A decorative veneer in which pebbles or granite are embedded in concrete for the purpose of maintaining the beauty of a promenade or a bank along with the scenery in a place where many people visit such as a park or a tourist attraction. Used. Conventionally, this concrete decorative board is subjected to a retarding agent treatment such as laying a delay paper 22 on the bottom of a formwork 21 as shown in FIGS.
After putting decorative aggregate 23 on top of it, concrete 24 is put in, then formwork 21 is rolled so that delay paper 22 is on top, formwork 21 is removed, and then delay paper 22 is removed. It was generally manufactured by performing a procedure of performing a washing process with a brush or low-pressure water on the surface whose surface hardening speed was delayed by the delay paper 22 to expose the decorative aggregate 23 on the concrete block surface.

Japanese Patent Application Laid-Open No. 4-329105 discloses a brushing device provided with a rotary brush and a water supply channel on the inlet side and a cleaning device provided with a high-pressure water jet nozzle on the outlet side on a conveyor for transporting cement concrete blocks. A concrete block surface aggregate exposure finishing apparatus to be installed is disclosed.

[0004]

However, the above-mentioned conventional method and apparatus for producing decorative concrete boards have the following problems. First, in the method using the delay paper 22 shown in FIGS. 3 and 4, the box form 21 is used.
A delay paper 22 is laid on the bottom, concrete 24 is put after the decorative aggregate 23 is put, and the delay paper 22 is put after a certain time has passed.
After the removal, it is necessary to perform a washing process with a brush or low-pressure water on the surface whose surface hardening speed has been delayed by the delay paper 22, that is, a work process of laying and removing the delay paper 22 is performed before the washing process. There was a problem that it was difficult to achieve automatic line production.

Further, the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-329105 becomes large as a whole, cannot be easily used in a work site requiring the laying of a concrete veneer, and the apparatus itself becomes expensive. There was a problem.
In addition, the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-329105 also requires a retarder treatment, and there is a problem that the process for this is a load. The present invention has been made in view of the above-mentioned problems in the prior art, and a method for manufacturing a concrete decorative board capable of efficiently manufacturing a concrete decorative board without performing a delay agent treatment such as delay paper with simple equipment and the method thereof. It is intended to provide a device.

[0006]

In other words, a method for manufacturing a decorative veneer according to the present invention comprises the steps of charging a decorative aggregate and concrete into a formwork to manufacture a concrete block, and connecting a nozzle connected to a high-pressure water source. Rotating and oscillating one or more of the nozzle units to perform a cleaning treatment on the concrete block with high-pressure water. The compressive strength of the concrete is 30
It may be adjusted to ^{kgf / cm 2 ~120kgf / cm 2} . When the compressive strength is less than 30 kgf / cm ² , strength sufficient for practical use as a concrete decorative board cannot be obtained. On the other hand, when the compressive strength exceeds 120 kgf / cm ² , it becomes difficult to efficiently expose the decorative aggregate by washing out with high-pressure water. .

Further, the present invention provides an apparatus for manufacturing a decorative veneer, comprising: a mold; and a cleaning means for performing a cleaning process using high-pressure water on a concrete block obtained by the mold. The means has a nozzle unit having at least one nozzle connected to a high-pressure water source, and the nozzle unit has an X-axis, a Y-axis,
It is characterized by being mounted on a moving device movable in the Z-axis direction so as to rotate and swing. Cleaning pressure by the high-pressure water preferably set to ^{50kgf / cm 2 ~2,000kgf / cm 2} . If the washing pressure is less than 50 kgf / cm ² , it is not possible to efficiently expose the decorative aggregate, while if the concrete compressive strength is about 120 kgf / cm ² , the 2,000 kgf
2,000 kg / cm ² high pressure water washing pressure is required
If it exceeds f / cm ² , the concrete fabric in which the decorative aggregate is embedded may be damaged, which is not preferable. Cleaning pressure by such high-pressure water is preferably set to 100kgf / cm ² ~1,500kgf / cm ² in the case of considering the extent and pump capacity to be used for washing out concrete surface from the production cost. As the nozzle, various nozzles having a nozzle diameter of 1 mm or less, preferably 0.5 mm or 0.2 mm, for example, a flat nozzle, a diamond nozzle, a direct nozzle, and a small-diameter nozzle can be used.

[0008]

Therefore, according to the method and apparatus for manufacturing a decorative concrete board of the present invention, a nozzle unit having one or more nozzles attached thereto is used, and the nozzle unit is rotated and swung to perform a cleaning treatment with high-pressure water on the concrete block. Therefore, it is not necessary to apply a retarder treatment such as a delay paper at the time of placing concrete, and it is possible to expose the decorative aggregate to the surface using only high-pressure water during the hardening of the concrete after placing. In addition, since the nozzle unit rotates and swings, in the case of linear washing that does not rotate and swing, even if the washing pressure of high-pressure water is about 200 kgf / cm ² , breakage such as chipping or the like of the end face of the concrete decorative board may occur. On the other hand, by rotating and oscillating, even at a high washing pressure, the decorative aggregate can be exposed to the surface without causing damage to the concrete decorative board.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method and apparatus for producing a decorative veneer of the present invention will be described below. FIG. 1 shows an apparatus for manufacturing a concrete decorative board according to one embodiment of the present invention. In the figure, a nozzle unit 1 has at least one or more nozzles (not shown) for direct, direct and small diameters. The nozzle unit 1 is attached to a nozzle unit rotating body 2 so as to rotate and swing. Such a nozzle unit rotating body 2
Is connected to one end of a high-pressure water supply pipe 3 whose other end is connected to a high-pressure pump (not shown).
It is attached to a moving device (not shown) that moves the nozzle unit 1 and the nozzle unit rotating body 2 in the axis, Y axis, and Z axis directions.

Therefore, according to the concrete veneer manufacturing apparatus of the above embodiment, the concrete veneer manufacturing method of the present invention is carried out as follows to manufacture a concrete veneer.

First, the decorative aggregate 5b is put into the form 4 and then the concrete 5a is put into it. Then, the form 4 is rolled to remove the form 4, and the concrete block 5 is manufactured. At that time, the compressive strength of the concrete 5a is 30 kgf / cm ² -12
Adjust to 0 kgf / cm ² . Next, the surface of the concrete block 5 is subjected to cleaning treatment with high-pressure water while rotating and swinging the nozzle unit 1 by the nozzle unit rotating body 2 in the cleaning chamber. At that time cleaning pressure by the high-pressure water to ^{50kgf / cm 2 ~2,000kgf / cm 2} . As a result, the decorative aggregate 5b is exposed on the surface of the concrete block 5, and a decorative decorative board is manufactured. In this process, the nozzle unit rotating body 2 is moved by the moving device in the X-axis and Y-axis directions.
The concrete block 5 is moved in the axis and Z-axis directions.
The decorative aggregate 5b is uniformly exposed on the entire upper surface of the substrate. Next, an embodiment in which the concrete veneer manufacturing method according to the present invention is applied and practiced to make the concrete veneer manufacturing process automatic and the concrete veneer is actually manufactured will be described.

(Manufacturing conditions) (1) Cosmetic aggregates used: Kinka, Oiso, Inada granite, rust granite (2) Concrete compressive strength and curing time 61 kgf / cm ² (cured daily) (3) Nozzle used High pressure water rotation Type high jet gun-multi nozzle φ0.
2 mm × 7 pieces with holes (4) high-pressure water by washing conditions (concrete compressive strength set so that drops speed is 1/2 feed when it becomes 110 kgf / cm ² or more) high-pressure water discharge pressure 700 kgf / cm ^2, Discharge flow rate 0.53 × 7 = 3.71 lit / min Nozzle rotation speed 1000-1500 rpm Nozzle distance to concrete block surface 70-100 mm Concrete block feed speed 3.6-4.5 m / min (Production result) A concrete veneer exposed to a necessary degree could be manufactured continuously and efficiently, and a concrete veneer having sufficient strength and appearance was obtained.

[0013]

As described above, according to the concrete veneer manufacturing method of the present invention, the nozzle block having one or more nozzles connected to the high-pressure water source is rotated and swung to wash the concrete block with high-pressure water. Thus, the steps of the conventional method of laying and removing the delay paper using the delay paper can be reduced, and the production efficiency of the decorative concrete board can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for manufacturing a decorative decorative board according to one embodiment of the present invention.

FIG. 2 is an explanatory view showing a manufacturing process of a concrete decorative board according to one embodiment of the present invention.

FIG. 3 is an explanatory view showing a manufacturing process of a conventional decorative decorative board.

FIG. 4 is another explanatory view showing a process of manufacturing a conventional decorative veneer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Nozzle unit, 2 ... Rotating body of a nozzle unit, 3 ... High pressure water supply pipe, 4 ... Formwork, 5 ... Concrete block.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B28B 1/00-1/54 B28B 11/00-19/00 C04B 41/00-41/72

Claims (5)

(57) [Claims] 1. A process for manufacturing a concrete block by putting decorative aggregate and concrete into a mold, rotating and oscillating a nozzle unit having one or more nozzles connected to a high-pressure water source, and washing. Pressure 200kgf / cm
Cleaning the concrete block with high-pressure water of ^{2 to} 2,000 kgf / cm ² . 2. The manufacture of a decorative concrete board comprising a mold and a washing unit for washing a concrete block obtained by the mold with high-pressure water by a nozzle unit having one or more nozzles connected to a high-pressure water source. In the apparatus, the nozzle unit is rotatably and swingably attached to a moving device that can move in the X-axis, Y-axis, and Z-axis directions. 3. The manufacture of a concrete decorative board provided with a washing means for washing a concrete block obtained by the formwork with high-pressure water using a mold unit and a nozzle unit having at least one nozzle connected to a high-pressure water source. In the apparatus, the nozzle unit is rotatably attached to a moving device that can move in the X-axis, Y-axis, and Z-axis directions. 4. Production of a decorative concrete board provided with washing means for washing a concrete block obtained by the formwork with high-pressure water by means of a nozzle unit having at least one nozzle connected to a formwork and a high-pressure water source. In the apparatus, the nozzle unit is swingably attached to a moving device that can move in the X-axis, Y-axis, and Z-axis directions. 5. The cleaning pressure of the high-pressure water is set to 200 kgf / cm ^2.
The concrete veneer manufacturing apparatus according to claim 2, 3 or 4, wherein the pressure is 2,000 kgf / cm ² .