JPH0911131A - Blast-cleaning method for blast-cleaned object - Google Patents

Abstract

PURPOSE: To effectively remove obstinate stains on the surface of a blast-cleaned object by blasting the mixture of dry ice grains and gel materials of surface-active agent mixture on the surface of a material of grinding so as the involve synergtic effects between a physical grinding effect of the dry ice grains and a chemical cleaning effect of interface active agent. CONSTITUTION: A blast device 1 comprises a dry ice grain blast gun 2, a gel blast part 3 of a surface-active agent mixture, and an air hose 4 for blasting it by air pressure. That is to say, the dry ice grains and the gel interface active agent mixture are blasted by an action of the blast gun 2 and an action of the blast part 3 respectively, and after the dry ice grains and the gel substance of the surface-active agent mixture are mixed in the blasting port, they are blasted on the surface of an object of grinding so as to grind its surface. This constitution effectively removes obstinate stains by synergetic effects between a physical grinding effect of the dry ice grains and a chemical cleaning effect of the interface active agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method for removing contaminants such as rust, oils and fats, and other contaminants adhering to the surface of a cleaning object such as a structure.

[0002]

2. Description of the Related Art Conventionally, a polishing method often used includes a power tool method such as a grinder method and a sander method, a manual tool method such as a wire brush method, a blast method such as a sand blast method and a shot blast method, and high pressure water washing. There are laws and so on. Among them, the blast method is one of the typical cleaning methods and has an excellent effect.

However, a disadvantage of the blasting method is that it is a method of projecting abrasives such as steel grains, sand grains, and resin onto the surface of the object to be cleaned. Dust is a problem.

Accordingly, as a method for eliminating such a problem, a method has emerged in which dry ice particles are projected as a polishing material onto the surface of an object to be cleaned. According to this method, the projected dry ice particles are subsequently sublimated into gas (carbon dioxide gas), so that dust generated by the abrasive itself is extremely small. Therefore, dust generated from the object to be cleaned may be considered.

[0005]

However, since the hardness of dry ice grains is lower than that of steel grains, sand grains, etc., the range of polishing is limited. For example, in the case of a steel surface, it is difficult to remove black rust and mill scale, and in the case of a concrete surface, it is difficult to remove stubborn exhaust gas deposits such as the inner surface of a tunnel. Therefore, in order to compensate for the low hardness of dry ice grains, it is conceivable to use a combination of abrasives such as steel grains and sand grains.
Again, the dust of the abrasive itself becomes a problem. The present invention
Such a problem is to be solved as described below.

[0006]

According to the present invention, a surface of an object to be cleaned is polished by mixing a dry ice particle and a gel of a mixture of a surfactant and projecting the surface of the object to be cleaned. This is intended to solve the above-mentioned problem.

[0007]

In the above means, when the surface of the object to be cleaned is mixed with dry ice particles and a gel of a mixture of a surfactant and projected, the physical cleaning effect of the dry ice particles and the surface activity are improved. The stubborn dirt on the surface of the object to be cleaned is also removed in combination with the chemical cleaning effect of the agent. Further, dust from the object to be cleaned generated by the cleaning is absorbed by a gel of a mixture of surfactants and removed.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of the cleaning method. Reference numeral 1 denotes a blast device. The blast device 1 includes a dry ice particle spray gun 2, a spray portion 3 of a gel-like material of a surfactant mixture, and an air hose 4 for spraying the same with air pressure.

The projection of the gel of the dry ice particles and the surfactant mixture onto the surface of the object 5 to be cleaned is performed by the operation of the dry ice particle spray gun 2. Is performed by the operation of the jetting part 3 of the gel-like substance of the surfactant mixture and the air hose 4. At this time, the mixing of the dry ice particles and the gel of the surfactant mixture is performed at the jet port. Thus, the surface of the object to be cleaned is polished by projecting a mixture of the dry ice particles and the gel of the surfactant mixture.

In this embodiment, the mixing of the dry ice particles and the gel of the surfactant mixture is carried out at the spout, but it goes without saying that the mixture may be spouted from the beginning.

The present invention is based on the principle that steel particles, sand particles, etc., which are abrasive materials in the conventional blasting method, are not used in combination, but this does not preclude the use of these materials together.

[0012]

The present invention has the following effects because it is constructed as described above. The present invention is a method for abrading the surface of the object to be cleaned by mixing and projecting a mixture of dry ice particles and a gel-like material of a surfactant on the surface of the object to be cleaned. The stubborn dirt on the surface of the object to be cleaned can be removed by the combination of the physical cleaning effect of the cleaning object and the chemical cleaning effect of the surfactant. Therefore, the low hardness of the dry ice grains can be sufficiently compensated for without using abrasive materials such as steel grains and sand grains. Further, dust generated from the polished material by the blasting is absorbed and removed by the gel-like material of the mixture of the surfactants, so that there is no generation of wastewater for removing the blast. The present invention has such excellent effects.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blast apparatus 2 Dry ice particle injection gun 3 Surfactant mixture gel injection part 4 Air hose 5 Object to be cleaned

Claims (1)

[Claims] 1. A polishing method characterized in that a surface of an object to be cleaned is polished by mixing and projecting dry ice particles and a gel-like material of a surfactant mixture onto the surface of the object to be cleaned. How to clean the object to be cleaned.