JPS61178480A - Artificial rock surface treatment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for surface treatment of artificial stone, in particular, irradiating artificial stone hardened with a hardening agent such as a coupling material, high-strength cement, or plastic with a laser beam, The present invention relates to a surface treatment method for artificial stone, which improves weather resistance and durability by forming a molten glass-like film on the surface.

[Conventional technology]

Traditionally, stone was obtained by cutting rough stones into appropriate sizes and hanging them into the desired shape. However, in recent years, there has been a shortage of rough stones, and especially those that can be made into high-quality stones with beautiful surfaces are extremely rare. It has become rarer and more expensive.

Additionally, when raw stone is harvested, stone waste (this is called aggregate) is produced, and currently approximately 172 pieces of it are discarded as waste.

Therefore, attempts have been made to use this aggregate to regenerate stone, and this has been put to practical use. The aggregate produced by digging the stone is mixed with a hardening agent and injected into the jar, which is then released from the mold and the surface of the resulting artificial stone is polished.

[Problem that the invention seeks to solve]

The conventional method for manufacturing artificial stone is to inject a mixture of aggregate and hardening agent into a formwork, but the resulting artificial stone has rough surfaces between the aggregates. Particularly when installed outdoors, they were prone to cracking due to sunlight, allowing rainwater to seep in, and causing them to collapse.

The object of the present invention is to provide a surface treatment method for artificial stone that eliminates the drawbacks of artificial stone and provides a robust surface and improved weather resistance.

[Means for solving problems]

The above object is achieved by the following means.

That is, the present invention is a method for surface treatment of artificial stone, which is characterized by irradiating the surface of artificial stone made of aggregate solidified with a hardening agent with a laser beam, plasma, etc. The present invention will be explained in more detail below. .

The artificial stone to be subjected to the surface treatment of the present invention is made by solidifying aggregate with a hardening agent, and the following methods are available for manufacturing this artificial stone.

The first method is to uniformly mix a hardening agent such as high-strength cement, coupling material, or plastic into the aggregate produced by digging natural stone, and then inject it into a mold and harden it. be. Although this method is easy to operate, it has the disadvantage that it is difficult to release the mold if it is a complicated mold, and that a large amount of high-grade aggregate is required if high-grade stones such as precious stones are to be made.

A second method is to apply a thermoplastic adhesive to the inner wall of the formwork, then spray a relatively high-grade material, such as deep-colored aggregate or a mixture of aggregate with a coupling agent, onto the inner wall and place it in the center. There is a method of injecting a mixture of ordinary aggregate and high-strength cement, curing and solidifying it. This method allows the desired high-grade aggregate to stand out on the surface and is relatively easy to release from the mold.
This is the preferred method.

A third method is to melt at relatively low temperatures, such as paraffin sheets. High-quality aggregates such as precious stones, precious metals, colored glass, etc. are arranged on the pace sheet, and this is semi-melted and adhered to the sheet.The pace sheet is pasted on the inner wall of the heated formwork, and a coupling agent is applied thereto. The lining material is sprayed, ordinary aggregate and high-strength cement are injected into the center, and the paste sheet on the wall of the form is melted and flowed out by heating and curing, and after solidification, the contents are released from the mold.・This is a method of This method is a preferred method because it allows precious stones, precious metals, etc. to stand out in a pattern on the surface and is extremely easy to release from the mold.

In the present invention, artificial stones obtained by any of the above methods can be used.

Conventionally, artificial stone materials have been polished using normal stone polishing methods after being released from the mold. However, in any case, since it is an aggregate of many aggregates, there are gaps between each aggregate, which causes cracks.

In the present invention, the surface of the artificial stone thus obtained is irradiated with a laser beam or plasma. The laser beam can be uniformly irradiated by scanning the beam over the entire surface using a known irradiation device.

By irradiating the laser beam, the surface of the artificial stone is heated to about 600 to 1200°C, and some of the aggregates on the surface are melted and fused together. In addition, a glass-like film is formed on the surface, which covers the entire surface of the artificial stone and blocks out the outside air.

In the present invention, the laser beam irradiation may be performed immediately after the artificial stone is released from the mold, but it is preferable to perform the laser beam irradiation once after heating and curing to remove the hardening stress on the surface. Further, even after laser beam irradiation, it is preferable to perform curing again with hot water or the like, and then perform final polishing.

〔Example〕

Deep-colored aggregate made of precious stones and colored glass was placed in a pattern on a paraffin sheet and stabilized by applying vibrations. By heating this sheet to about 80° C., the colored aggregate was adhered onto the sheet. Formwork with rectangular parallelepiped content approximately 80°
The paste sheet was pasted on its inner wall, a silane coupling material was applied thereto, and it was lined with cement. A mixture of ordinary aggregate and high-strength cement mixed with water was injected into the center of the form and heated to approximately 120°C for curing.

At this time, the pace sheet melted and flowed out to the outlet at the bottom of the mold. After the contents solidified, the mold was released, but the mold release was easy. The obtained artificial stone was placed in a laser irradiation chamber, and the surface was irradiated while scanning with a laser beam. As a result, the surface of the stone was partially melted and a glassy coating was formed.

After irradiation with the laser beam, the stone was cured with hot water again and finished with polishing, resulting in an artificial stone with a glossy pattern on its surface. This artificial stone was placed in the weather meter room along with a comparison product that was not treated with laser light.
As a result of a weather resistance test, the comparison product had cracks on the surface and the aggregate had peeled off, but the product of the present invention had no abnormalities.

〔Effect of the invention〕

The present invention has the following effects.

(b) By treating the surface with laser beams, the weather resistance, which has been a drawback of artificial stone, is significantly improved.

(b) Since the surface weather resistance of artificial stones is improved, the curing conditions during stone production can be simplified, leading to cost reductions.

(c) A glassy film is formed on the surface, resulting in a beautiful appearance and a sense of luxury.

Patent Applicant Oki 1) Ryosei-41-

Claims (1)

[Claims] A method for surface treatment of artificial stone, which comprises irradiating the surface of artificial stone made of aggregate solidified with a hardening agent with a laser beam or high-temperature plasma.