JPH11198040A - Adhesion strengthening agent for letter engraving and etching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen adhesion between an acrylic resin paint mask sheet and an etched material by a protective material to protect a mask sheet at the time of sand blast etching and etch a designed angular part cleanly by sand blasting. SOLUTION: A mask sheet 2 is attached on a surface of an etched material 1. As the etched material 1, a stone, glass, a porcelain material, cement, a secondary worked article, metal, etc., can be considered of. Thereafter, resin paint 4 is applied on the etched material 1 on which the mask sheet 2 is stuck. As the resin paint 4, it is possible to use a clear lacquer, and especially, an acrylic resin clear lacquer is favourable. Therefore, an etching pattern 7 such as letters, family crests, etc., is formed on a surface of the stone, etc., by sand blasting etching.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive reinforcing agent for engraving and an engraving method, and more particularly to an adhesive reinforcing agent for engraving useful when engraving a pattern such as a character or a picture on a surface of a stone or the like, and using the same. It relates to the etching method.

[0002]

2. Description of the Related Art As a method for forming a pattern such as a character or a pattern on the surface of a stone, glass, metal or the like, an etching method using sandblasting is often used. In this method, a mask sheet such as a rubber sheet or a plastic sheet having an adhesive surface is attached to a surface of a stone or the like, and a target pattern is cut out from the sheet with a cutter knife or the like, or
This is a method of applying a sandblasting process after attaching a mask sheet from which a pattern is cut out.

A specific example of engraving characters, family crests, and the like on the surface of a tombstone will be described. First, characters and family crests necessary for the mask sheet are cut out with a plotter or the like, and this sheet is attached to the surface of the gravestone. After that, the necessary characters and family crests are sprayed with a strong sandblast to etch the necessary characters and family crests on the surface of the tombstone, and then the sheet is peeled from the tombstone. However, a mask sheet may be damaged during sandblasting or the sheet may be displaced. To prevent this, a sheet in which a cloth sheet is sandwiched between two rubber sheets has been disclosed ( Registered Utility Model Publication No. 30018828).

[0004] Further, in addition to breakage and sheet deviation during sandblasting, a rubber sheet having excellent pattern cutting properties includes a surface layer having a predetermined rubber composition and rubber hardness.
A rubber sheet provided with a lower layer, an adhesive layer and a release paper has been disclosed (JP-A-6-126892).

[0005]

However, no matter what kind of rubber sheet is used, when only the rubber sheet is used as the mask sheet, the rubber sheet is peeled off from the stone material surface during sandblasting, depending on the size and shape of characters and family crests. There is a problem that it is easy. For example, in the case of a fine island-shaped pattern, it is particularly easy to peel off. When peeled, the sandblasting equipment is stopped and repaired with instant adhesive every time, but for observation and repair of the peeled state,
There is a problem that the work time is increased due to the suspension of the sandblasting process, and the productivity is deteriorated.

In addition, there is a problem that air enters between the rubber sheet and the stone surface due to the wind pressure of the sand blast, and the rubber sheet swells like a balloon. When the rubber sheet expands like a balloon, there is a problem that corners and the like of characters cannot be etched cleanly.

The present invention has been made to address such a problem, and a mask sheet such as a rubber sheet has been developed.
It is an object of the present invention to provide an adhesive reinforcing agent for engraving that can be finely etched even with a fine pattern without being peeled off during sandblasting and without stopping the sandblasting process, and an etching method using the same.

[0008]

The adhesive reinforcing agent for engraving of the present invention is an adhesive reinforcing agent for engraving for protecting a mask sheet at the time of sandblasting, and the protective material is an acrylic resin paint. It is characterized by.

According to the etching method of the present invention, a step of attaching a mask sheet to the surface of the material to be etched, a step of applying a resin paint on the material to be etched to which the mask sheet is attached, and etching by sandblasting. And a step of performing Further, the resin paint is an acrylic resin paint.

According to the present invention, an acrylic resin paint is used as an adhesive reinforcing agent for engraving, thereby penetrating between an adhesive surface of a material to be etched such as a stone and a mask sheet such as a rubber sheet to increase the adhesive strength. Can be. As a result, peeling and swelling of the rubber sheet during sandblasting can be prevented. In addition, since the cross section of the rubber sheet is particularly hardened, chatter at corners of the pattern due to sandblasting is reduced, and the corners can be etched cleanly. Further, the acrylic resin paint is peeled off by sandblasting or when the rubber sheet is peeled off, so that no stain or stain remains after etching.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The acrylic resin paint according to the present invention comprises acrylic acid and methacrylic acid or derivatives thereof,
This is a paint containing a thermoplastic acrylic resin made of styrene or the like as a main component of the 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 sandblasting 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 containing other components is preferable. Other preferable components constituting the coating film include special celluloses such as nitrocellulose and acetylbutyl cellulose. Further, by using a thermoplastic acrylic resin obtained by copolymerizing a functional monomer containing a hydroxyl group or the like, an acrylic resin paint capable of being made urethane can be obtained, which is an example of a preferable acrylic resin paint.

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.
In addition, specific properties (20 ° C): 0.93 ± 0.0
3. Drying time (20 ° C): 5 minutes for touch drying, 2 hours for taping, Hardness: Pencil hardness of HB or higher, Adhesion: Clear lacquer having a hardness test of 90/100 or higher is preferred.

Suitable acrylic resin paints include, for example, Nippe Acrylic Auto Clear Super (manufactured by Nippon Paint Co., Ltd.), and Rubber Ace (trade name) sold by Tough Rikagaku Kogyosho as an adhesive for engraving. Can be.

The mask sheet according to the present invention can be used as long as the pattern can be etched without being peeled off during sandblasting. Specific examples include a rubber sheet, a plastic sheet, a cloth sheet, a paper sheet, and a composite material thereof. Among these,
Particularly, a rubber sheet is preferable because it can withstand the wind pressure of sandblasting. As the rubber component of the rubber sheet,
Examples include natural rubber, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, and chlorosulfonated polyethylene rubber. By adding various fillers, softeners, crosslinking agents, resins, crosslinking accelerators, processing aids, reinforcing agents and the like to these rubber components and vulcanizing them, a rubber sheet body is obtained. The thickness of the rubber sheet body is preferably about 0.5 to 2 mm. Natural rubber, styrene-butadiene, acrylonitrile, chloroprene, acrylic, silicone adhesives alone or in the rubber sheet body
A rubber sheet can be obtained by laminating an adhesive layer blended with at least one kind and release paper such as polyethylene or silicone resin.
Specific examples of the rubber sheet include Sandstar (trade name, manufactured by Sanuki Rubber Co., Ltd.) and Silver Sheet (trade name, manufactured by Teraoka Seisakusho Co., Ltd.).

The etching method of the present invention will be described with reference to FIG. FIG. 1 is a sectional view showing a process of forming a pattern on the surface of the material to be etched. A mask sheet 2 is attached to the surface of the etching target material 1 (FIG. 1A). Examples of the material to be etched 1 include stone, glass, porcelain, secondary processed cement, and metal. 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 a product manufactured from the above stone material. For example, tombstones, monuments, nameplates, nameplates, building stones, and the like. This is because the mask sheet 2 is easily peeled off from the stone material surface during sandblasting depending on the size and shape of characters and family crests. Also,
The mask sheet 2 is preferably a rubber sheet that is in close contact with the stone material surface. Note that 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 its surface.

The mask sheet 2 can be cut out of the pattern portion 3 such as a character or a family crest and then pasted, or after pasting, the pattern portion 3 such as a family crest is drawn with a cutter knife or the like.
That portion may be cut out and removed.

Next, a resin coating material 4 is applied on the etched material 1 to which the mask sheet 2 is attached (FIG. 1B).
As the resin paint 4, a clear lacquer can be used, and the above-mentioned acrylic resin clear lacquer paint is particularly preferable. The acrylic resin clear lacquer paint has an effect of penetrating between a stone material and a rubber sheet to increase mutual adhesion, and also has an effect of hardening and reinforcing the edge surface of the rubber sheet.

As a method of applying the clear lacquer, a spray coating, a dip coating, a brush coating, a printing method and the like can be used. Of these, spray etching, which is a simple work process, is preferred for etching gravestones and the like. Also,
The clear lacquer may be applied to the entire surface of the workpiece 1 to be etched, 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 start from the edge surface. In addition, when fine island-shaped rubber pieces fly by sandblasting,
It is preferable to apply a clear lacquer on the entire surface of the rubber sheet. The coating thickness may be any thickness that does not cause peeling of the edge surface due to sandblasting conditions. A single spray application may have the effect of suppressing peeling of the rubber sheet.

Sand blasting is performed on a portion to be a character, a family crest, and the like (FIG. 1C). Sandblasting conditions vary depending on the type of stone material and the like, but various conditions that enable deep engraving and fine processing can be adopted by using a rubber sheet and clear lacquer application 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, or the like can be used according to the type of the workpiece 1 to be etched. In the case of stone materials, it is preferable to use diamond sand and carborundum having a roughness of about 30 mesh. The air pressure of sandblasting is 2 to 12 atmospheres,
Preferably 4 to 8 atmospheres is preferred. The sandblasting time can be adjusted according to the depth of the engraving.

An etching pattern 7 such as a character or a family crest is formed on the surface of the stone material by etching by sandblasting.
(D)). In the present invention, since the rubber sheet does not chatter at the time of sandblasting, corners of a pattern such as a character or a family crest can be carved neatly. Finally, the stone material on which the etching pattern 7 is formed by peeling the rubber sheet is completed (FIG. 1 (e)).

[0021]

Example 1 A tombstone was formed on a granite surface by sandblasting. A rubber sheet (trade name: Sandstar, manufactured by Sanuki Rubber Co., Ltd.) cut out from the tombstone inscription was attached to the granite surface. Thereafter, a rubber ace (trade name) was sprayed once around the cut edge portion by a spray method 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. No peeling of the rubber sheet was observed during sandblasting. In addition, the rubber sheet did not swell like a balloon. After the sand blasting, the rubber sheet was peeled off to obtain a tombstone having a tombstone with a sharply etched corner of the pattern.

Comparative Example 1 A tombstone of a tombstone was carved under the same conditions and conditions as in Example 1 except that a coating film made of Rubber Ace was not formed. A part of the rubber sheet peeled off during sandblasting and was repaired several times with instant adhesive. In addition, balloon-like swelling was observed in a part of the rubber sheet. The average work time for carving the gravestone inscription on the tombstone required twice as long as in Example 1, including the repair time. The resulting tomb inscription was partially broken at the corners of the pattern and was not etched properly.

[0023]

Since the adhesion reinforcing agent for engraving of the present invention is an acrylic resin paint, the adhesion between the mask sheet and the material to be etched can be enhanced. As a result, corners of the pattern can be etched cleanly by sandblasting.

According to the etching method of the present invention, a step of attaching a mask sheet to the surface of the material to be etched, a step of applying a resin paint on the material to be etched to which the mask sheet is attached, and etching by sandblasting. Since the mask sheet does not peel off or swell, no repair is required during sandblasting. For this reason, the production time can be significantly reduced. Further, by using an acrylic resin paint as the resin paint, it is possible to obtain a stone material or the like having excellent finished surface accuracy.

[Brief description of the drawings]

FIG. 1 is a process cross-sectional view of forming a pattern on a surface of a material to be etched.

[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)

[Claims] 1. An adhesive reinforcing agent for engraving as a protective agent for protecting a mask sheet during sandblast etching, wherein the protective agent is an acrylic resin paint. 2. A step of attaching a mask sheet to a surface of an etching target material, a step of applying a resin paint on the etching target material to which the mask sheet is attached, and a step of etching by sandblasting. An etching method characterized in that: 3. The etching method according to claim 2, wherein said resin paint is an acrylic resin paint.