JP3773345B2 - Gravestone carving method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for engraving a tombstone in which a pattern such as a character or a pattern is etched on the surface of the tombstone.
[0002]
[Prior art]
An etching method using sandblasting is often used as a method for forming a pattern such as a character or a pattern on the surface of stone, glass, metal or the like.
This method can be used after attaching a mask sheet such as a rubber sheet or plastic sheet having an adhesive surface to the surface of a stone or the like, and then cutting out the desired pattern from the sheet with a cutter knife or the like, or a mask sheet from which the pattern has been cut out This is a method of performing a sandblasting process after pasting.
[0003]
A specific example in which characters, family crests, etc. are etched on the surface of the tombstone will be described. First, characters and family crests necessary for the mask sheet are cut out with a plotter, and this sheet is pasted on the surface of the tombstone. After that, intense sandblast is sprayed on the necessary characters and family crests, and the necessary characters and family crests are etched on the surface of the tombstone, and then the sheet is peeled off from the tombstone. However, in order to prevent the mask sheet from being damaged or the sheet from being displaced during sandblasting, a sheet in which a cloth sheet is sandwiched between two rubber sheets is disclosed ( Registered Utility Model Publication No. 3001828).
[0004]
Also disclosed is a rubber sheet provided with a surface layer, a lower layer, an adhesive layer, and a release paper having a predetermined rubber composition and rubber hardness as a rubber sheet excellent in pattern cutting performance in addition to breakage and sheet displacement during sandblasting (Japanese Patent Laid-Open No. 6-126872).
[0005]
[Problems to be solved by the invention]
However, in any rubber sheet, when only a rubber sheet is used as a mask sheet, there is a problem that the rubber sheet easily peels off from the stone surface due to the size and shape of characters, family crests, and the like. For example, in the case of a fine island pattern or the like, it is particularly easy to peel off.
In the case of peeling, the sandblasting device is stopped each time and repaired with an instantaneous adhesive, etc., but for the observation and repair of the peeling state, the sandblasting process is temporarily stopped, which requires work man-hours and productivity is inferior. There is a problem.
[0006]
In addition, there is a problem that air enters between the rubber sheet and the stone surface due to the wind pressure of the sandblast, and the rubber sheet swells in a balloon shape.
The rubber sheet swells like a balloon, and there is a problem that the corners of characters cannot be etched cleanly.
[0007]
The present invention has been made to cope with such problems, and a mask sheet such as a rubber sheet is not peeled off during sandblasting, and can finely etch even fine patterns without temporarily stopping the sandblasting process. The purpose is to provide a method for gravestone writing.
[0009]
The present invention is a method for engraving a tombstone that engraves a character or a pattern on the surface of a tombstone, wherein a rubber sheet is pasted on the surface of the tombstone to cut out the character or the pattern portion, or a rubber sheet from which the character or the pattern portion has been cut out. A step of applying, a step of applying a solution-type clear lacquer to at least an edge surface of the cut out character or design portion, and a step of etching the character or design portion with sand blasting. To do.
The step of applying the clear lacquer is a step performed by spray application.
The clear lacquer is an acrylic resin lacquer.
[0010]
According to the present invention, by using an acrylic resin paint as an adhesion reinforcing agent for engraving, the adhesive force can be increased by penetrating between the adhesion surfaces of an etched material such as a stone material and a mask sheet such as a rubber sheet. As a result, it is possible to prevent the rubber sheet from peeling and swelling during sandblasting.
In addition, since the rubber sheet cross-section is particularly hardened, the chatter of the corners of the pattern due to sandblasting is reduced, and the corners can be etched cleanly.
Furthermore, the acrylic resin paint is peeled off by sandblasting or when the rubber sheet is peeled off, so that no stains or dirt remain after etching.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The acrylic resin paint according to the present invention is a paint having a thermoplastic acrylic resin composed of acrylic acid and methacrylic acid or a derivative thereof, styrene, or the like as a main component of a coating film, and is a solution-type clear lacquer. The acrylic resin paint can enhance the adhesive force between the stone material and the rubber sheet in the sand blast described later.
The acrylic resin paint can be used even if it is a coating film made of a thermoplastic acrylic resin alone, but an acrylic resin paint blended with other components is preferred. Preferable other components constituting the coating film include special celluloses such as nitrocellulose and acetylbutylcellulose.
In addition, by using a thermoplastic acrylic resin obtained by copolymerizing a functional monomer containing a hydroxyl group or the like, an acrylic resin paint that can be urethaned can be obtained, which is an example of a preferable acrylic resin paint.
[0012]
The acrylic resin paint is obtained by dissolving the components constituting the coating film in an organic solvent. Suitable organic solvents include aromatic hydrocarbons such as toluene and xylene, esters such as ethyl acetate and butyl acetate, and ketones such as cyclohexanone.
Also, paint properties are specific gravity (20 ° C): 0.93 ± 0.03, drying time (20 ° C): 5 minutes by dry-to-touch, tapable for 2 hours, hardness: pencil hardness of HB or more, adhesion: gobame Clear lacquers with a test of 90/100 or higher are preferred.
[0013]
Examples of suitable acrylic resin paints include the trade name NIPPE Acrylic Auto Clear Super (manufactured by Nippon Paint Co., Ltd.), and the trade name Rubber Ace sold by Tough Rikagaku Kogyo as a character engraving adhesion strengthener.
[0014]
The mask sheet according to the present invention can be used as long as it can etch a pattern without peeling during sandblasting. Specific examples include rubber sheets, plastic sheets, cloth sheets, paper sheets, and composite materials thereof. Among these, a rubber sheet is particularly preferable because it can withstand the wind pressure of sandblast.
Examples of the rubber component of the rubber sheet include natural rubber, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, and chlorosulfonated polyethylene rubber.
A rubber sheet body can be obtained by adding various fillers, softeners, crosslinking agents, resins, crosslinking accelerators, processing aids, reinforcing agents, and the like to these rubber components and vulcanizing them. The thickness of the rubber sheet body is preferably about 0.5 to 2 mm.
A rubber sheet body with an adhesive layer made of natural rubber, styrene-butadiene, acrylonitrile, chloroprene, acrylic, silicone, or a mixture of two or more adhesives, and release paper such as polyethylene and silicone resin A rubber sheet is obtained by laminating.
Specific examples of the rubber sheet include trade name Sandstar (manufactured by Iki Rubber Co., Ltd.) and trade name silver sheet (manufactured by Teraoka Seisakusho).
[0015]
The etching method of the present invention will be described with reference to FIG. FIG. 1 is a process sectional view for forming a pattern on the surface of an etched material.
A mask sheet 2 is affixed to the surface of the etched material 1 (FIG. 1A).
Examples of the etched material 1 include stone, glass, porcelain, cement secondary processed products, and metals. The etched material 1 suitable for the present invention is a stone, and examples of the stone include granite, andesite, marble, serpentine, and terrazzo. Examples of the target product include products manufactured from the above stone materials. For example, gravestones, monuments, nameplates, nameplates, architectural stones and the like. This is because the mask sheet 2 easily peels off from the stone surface during sandblasting due to the size and shape of characters, family crests, and the like. The mask sheet 2 is preferably a rubber sheet that is in close contact with the stone surface.
The mask sheet 2 is sufficiently dried before being attached. This is because the surface of natural stone such as granite has moisture absorption and water absorption and retains moisture on the surface.
[0016]
The mask sheet 2 may be pasted after the pattern portion 3 such as a character or family crest is cut out or pasted, or after the pasting, the pattern portion 3 such as a family crest may be drawn with a cutter knife or the like, and the portion may be cut out and removed. .
[0017]
Next, the resin paint 4 is applied on the etched material 1 to which the mask sheet 2 is attached (FIG. 1B). A clear lacquer can be used as the resin paint 4, and the above-mentioned acrylic resin clear lacquer paint is particularly preferable. The acrylic resin clear lacquer paint has an effect of penetrating between the stone material and the rubber sheet to enhance the mutual adhesive force, and to cure and reinforce the edge surface of the rubber sheet.
[0018]
As a coating method of the clear lacquer, spray coating, dip coating, brush coating, printing method or the like can be used. Among these, spraying with a simple work process is preferable for etching gravestones and the like. Further, the clear lacquer may be applied to the entire surface of the etched material 1, but is preferably applied to the edge surface of the rubber sheet. This is because peeling of the rubber sheet and balloon-like swelling due to sandblasting starts from the edge surface. In addition, when a fine island-like rubber piece flies by sandblasting, it is preferable to apply clear lacquer to the entire rubber sheet.
The coating thickness may be a thickness that does not cause peeling of the edge surface due to sandblasting conditions. There is a case where an effect of suppressing peeling of the rubber sheet can be obtained by spraying once.
[0019]
Sandblasting is performed on a portion that becomes a character, a family crest, or the like and etched (FIG. 1C).
Although sandblasting conditions vary depending on the type of stone, etc., various conditions that enable deep engraving and fine processing can be adopted by using a rubber sheet and clear lacquer coating in combination.
Various materials can be used as the abrasive 6 blown out from the sandblast nozzle 5. For example, gold sand, corundum, carborundum, silica sand, spinel, alumina, silicon carbide, synthetic diamond, boron nitride, emery garnet and the like can be used according to the type of the etched material 1. For stone materials, gold sand and carborundum with a roughness of about 30 mesh are preferred.
The air pressure for sandblasting is preferably 2 to 12 atmospheres, more preferably 4 to 8 atmospheres. The sandblasting time can be adjusted according to the depth of engraving.
[0020]
Etching patterns 7 such as letters and family crests are formed on the stone surface by etching by sandblasting (FIG. 1D). In the present invention, since there is no chattering of the rubber sheet during sandblasting, corners of patterns such as letters and family crests can be carved cleanly.
Finally, the rubber sheet is peeled off to complete the stone material on which the etching pattern 7 is formed (FIG. 1 (e)).
[0021]
【Example】
Example 1
A tombstone was formed on the surface of the granite by sandblasting. A rubber sheet (trade name: Sandstar, manufactured by Iki Rubber Co., Ltd.) with a tombstone cut out was pasted on the granite surface. After that, the product name rubber ace was sprayed once by the spray method around the cut edge part to form a coating film. After the coating film was dried, it was etched by sandblasting at a pressure of 5 atm for 3 hours by a sandblasting method using gold sand as an abrasive. The rubber sheet did not peel off during sandblasting. Further, the rubber sheet did not swell up like a balloon.
After the sandblasting, the rubber sheet was peeled off to obtain a tombstone having a tombstone in which the corners of the pattern were finely etched.
[0022]
Comparative Example 1
A tombstone inscription was carved by the same condition method as in Example 1 except that no rubber ace film was formed.
During sandblasting, a part of the rubber sheet was peeled off and repaired several times with instant adhesive. In addition, balloon-like bulges were found on a part of the rubber sheet. The average work time for carving the tombstone inscriptions was twice as long as in Example 1, including repair time.
The tombstone obtained was broken in part of the corner of the pattern and was not etched cleanly.
[0024]
The tombstone engraving method of the present invention includes a step of attaching a rubber sheet to the surface of the tombstone, a step of applying a resin paint on the tombstone to which the rubber sheet is attached, and a step of etching with sandblast. As a result, the adhesion between the rubber sheet and the tombstone surface can be strengthened, the mask sheet does not peel off or swell, and the corners of the pattern can be etched cleanly without requiring repair during sandblasting. For this reason, the production time can be greatly shortened. Further, by using an acrylic resin lacquer as the clear lacquer, a tombstone with excellent finished surface accuracy can be obtained.
[Brief description of the drawings]
FIG. 1 is a process cross-sectional view for forming a pattern on a surface of an etched material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Etching material 2 Mask sheet 3 Pattern part 4 Resin paint 5 Sand blast nozzle 6 Abrasive material 7 Etching pattern

Claims (3)

A method for engraving characters or designs on the surface of a tombstone, wherein a rubber sheet is pasted on the surface of the tombstone to cut out the characters or designs, or a rubber sheet from which the characters or designs are cut out is attached. A tombstone character comprising: a step; a step of applying a solution-type clear lacquer to at least an edge surface of the cut out character or design portion; and a step of etching the character or design portion with sand blasting. Carving method. The method for engraving a tombstone according to claim 1, wherein the step of applying the clear lacquer is a step performed by spray application. The method for engraving a tombstone according to claim 1 or 2, wherein the clear lacquer is an acrylic resin lacquer.

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