JPH0430969A - Manufacture of mask for blast engraving - Google Patents

Abstract

PURPOSE:To improve engraving accuracy and engraving workability, by taking a monoblock body located on an original film out of an exposer after exposing a resin layer for a fixed time by a parallel light via an original film from a exposing glass side and peeling off a protection film after washing the nonexposed part of the resin layer with a support film being peeled off. CONSTITUTION:A resin layer in a constant thickness is formed with a photosensitive resin 6 being flowed in via a nonadhesive support film 3 onto the original film 2 which is placed on the exposing glass 1 of the exposer inside. Then, the resin layer is flatly pressed from the above of a protection film 7 with the adhesives side of the nonadhesive protection film 7 on whose one face adhesive 4 is coated being placed so as to meet the resin layer side. The monoblock body of the original film 2 above is then taken off from the exposer, after exposing the resin layer 6 for a fixed time by a parallel light via the original film 2 from the exposing glass 1 side and a blast engraving mask is made with the protection film 7 being peeled off, after washing the nonexposed part of the resin layer with the support film 3 being peeled off.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention is applicable to stone, ceramics, concrete, glass,
Blast cutting is suitable for carving desired characters or shapes according to the shape of the exposed part of the mask by attaching a mask to the surface of a hard material such as a metal material and blasting high-pressure spray particles. The present invention relates to a method of manufacturing a mask for use.

[Conventional technology 1] Conventionally, as a surface processing method for hard materials such as stone, ceramics, concrete, glass, metal, etc., hand chiseling, drilling, or abrasive blasting have been used depending on the material to be processed. It is used as

[Problem to be solved by the invention 1 In such a processing method, it is possible to perform fine cutting to a certain extent using a hand chisel, but it not only requires a great deal of labor but also requires skill, and is not suitable for mass production. Drilling requires less labor than hand chiseling, but it still requires skill and is not very likely to be mass-produced. On the other hand, jet machining using carcass particles requires less labor and skill, but it does not allow fine machining, and it has been impossible to carve precise characters and shapes.

Incidentally, the carcass grain injection machining method involves jetting carcass grains onto the surface of the workpiece to carve the surface. A method of spraying nicotine particles is also being developed.

However, conventional masks are made by cutting out a rubber plate with a cut knife, which not only takes time and effort to process, but also prevents the mask, which is tightly attached to the processed surface, from peeling off or rolling up due to the spray pressure. However, when a mask is attached to a processed surface using an adhesive, there is a problem in that it is difficult to remove the mask. Furthermore, it is difficult to create a fine mask with this type of mask, and precise cutting is impossible.

The present invention was made in view of the above circumstances, and it is possible that during cutting using a blasting machine, the part to which the mask is attached for coating the non-cutting part may be turned over or peeled off due to the blasting pressure of the blasting machine. The purpose of the present invention is to provide a blast engraving mask that has high adhesion that does not cause the mask to smear, allows engraving to faithfully express characters and shapes according to the mask image, and that can be easily peeled off after engraving. shall be.

[Means for Solving the Problems] Therefore, in order to solve the above-mentioned problems, the method for manufacturing a blast cutting mask of the present invention is to adhere to the surface of a workpiece to expose the workpiece. In the method for manufacturing a blast engraving mask used to engrave the shape of the exposed part by blasting high-pressure jet particles onto the exposed part, a non-adhesive mask is placed on the original film placed on the exposure glass in the exposure device. After a photosensitive resin is injected through the adhesive support film to form a resin layer of a certain thickness, the adhesive side of a non-adhesive protective film coated with an adhesive on one side faces the resin layer side. The resin layer is pressed flat from above the protective film, and then the resin layer is exposed to parallel light for a certain period of time from the exposure glass side through the original film. The integrated object is taken out from the exposure device, the supporting film is peeled off, the non-exposed portion of the resin layer is washed with water, and the protective film is peeled off to obtain a mask for blast cutting.

[Function 1] In the above invention, the support film interposed between the original film placed on the exposure glass in the exposure device and the photosensitive resin layer is a support film interposed between the original film and the photosensitive resin layer to prevent the photosensitive resin from adhering to the original film. This is provided to prevent contact with the synthetic resin.

Then, by placing a protective film coated with adhesive on one side so that the adhesive side faces the resin layer side and pressing the resin layer flat from above the protective film, the resin layer will flatten along the exposed glass surface. At the same time, the adhesive of the protective film and the resin layer are brought into close contact with each other. Therefore, if parallel light is applied to the photosensitive resin layer from the exposure glass side through the original film and exposed for a certain period of time, the photosensitive resin layer will be exposed to light according to the image on the original film, and as a result, the exposed areas will become hard and the non-exposed areas will remain in their original state. The resin quality is maintained.

In the present invention, since the exposure of the photosensitive resin layer is by parallel light irradiation, the hardened portion due to exposure to light is formed perpendicularly to the surface of the resin layer, and the hardened shape is different between the back surface and the front surface of the resin layer. The image is formed faithfully to the image on the original film.

After exposure, the integrated support film, resin layer, and protective film on the original film is taken out from the exposure device, and the support film is peeled off. Since the support film is non-adhesive, it can be easily peeled off from the resin layer.

Then, the non-exposed portions of the resin layer are washed out to leave a hardened shape due to exposure to light. This hardened shape forms a resist shape for blasting according to the image on the original film, and functions as a mask for blasting.

Therefore, in order to perform blast cutting using such a resin mask, remove the protective film attached to one side of the resin layer.This protective film is also non-adhesive and can be easily peeled off, but the protective film The adhesive (consisting of a mixture of diazo resin, polyvinyl alcohol, and vinyl acetate imulsion) applied to one side of the film has moderate tackiness due to the above exposure, and as a result, it is more adhesive to the resin layer than the non-adhesive protective film. It has a strong adhesive force, and when the protective film is removed, the adhesive remains attached to the resin layer side. With this adhesive, the resin mask adheres well to the surface of the material to be cut, withstands blasting pressure without peeling or rolling up, and easily peels off when it needs to be removed. , it can be used as a resist mask that is ideal for blast engraving.

[Example 1 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic cross-sectional view showing, in order of steps, an embodiment of the method for manufacturing a blast cutting mask of the present invention.

First, an original film 2 is placed on an exposure glass 1 in an exposure device (not shown) (FIG. 1A). On this film, an image is developed in which the predetermined shape to be carved is the light-shielding part 2a and the non-cutting part is the light-transmitting part 2b.

The support film 3 is placed on this original film 2 ((
b) Figure). The supporting film is a polypropylene film (or a polyester film may also be used) having a thickness of about 0.2 mm, and is non-adhesive.

A bank 5 is formed on or around the support film 3 using adhesive tape with a certain thickness (Figure (C))
. Then, a fluid photosensitive nylon resin is poured into the bank 5 as a photosensitive resin to form a photosensitive resin layer 6 with a thickness of about 1.5 mm (see figure (d)). At this time, the original film 2 is protected from the photosensitive resin layer 6 by the support film 3.

Next, a protective film 7 made of a polypropylene film having a thickness of approximately 012ffllT+ is adhered to the resin 6 in the same manner as described above, but one side of this protective film 70 is coated with an adhesive 4 made of a mixture of diazo resin, polyvinyl alcohol, and vinyl acetate imulsion. 20 by roll coating
It is applied to a thickness of about μm, and laid so that the adhesive 4 side faces the photosensitive resin layer 6 side (Figure (e)).

Then, pressure rolling is performed using a roller 8 from above the protective film 7 to pass the photosensitive resin 6 through the protective film 7.
flatten it (Figure (f)).

Next, the area around the exposure device is placed in a dark room, and light from a light source 9 such as a halogen lamp or a mercury lamp is corrected to parallel light from below the exposure glass 1 via a parallel light correction means 10 and exposed, and the original film 2 is exposed. The photosensitive resin 6 is then exposed to the straight light for about 20 to 30 seconds (see figure (g)).

With this exposure method, the light does not fall on the photosensitive resin layer 6 in an oblique manner, and as a result, the image on the original film 2 is faithfully exposed to light, and as a result, the resin corresponding to the transparent portion 2a of the original film 2 is exposed. Only the exposed portion 6b of the layer 6 is exposed to light, and that portion is hardened.

Next, from the exposure device, the integral object 3.5.6 on the original film 2 is
．． Take out the whole 7 and peel off the support film 3 (Figure (h)). Since the support film 3 is non-adhesive, it easily separates from the resin layer 6. When the entire resin layer 6 is exposed, the non-hardened portion of the non-exposed portion 6a is easily removed by washing with water, hot water, or a solvent containing 3% caustic soda ((1) )figure).

In this way, the creation of the blast engraving mask is completed, but
When using this, remove the protective film 3 (
J), the adhesive 4 side of the resin layer 6 is made to face the material to be cut 11, and a predetermined part to be cut is exposed.

Then, the exposed portion (non-exposed portion 6a) of the resin layer 6 is blast-cut by injecting ceramic particles or the like from the nozzle 12 at high pressure using a blasting machine (Figure (1)). On this occasion,
Initially, the adhesive 4 remains attached to the exposed portion 6a, but is easily broken off by blasting.

According to this blast cutting, regardless of the material of the workpiece 11, by adjusting the injection angle and injection pressure of the nozzle 12, two types of cutting cross-sectional shapes 14a (boring) shown in FIG. In addition to machining) and 14b (deep hole vertical hole cutting), it is possible to form cut holes and shapes of arbitrary depth.

Although the adhesive 4 is applied to the protective film 7 side in the process of manufacturing the mask as described above, the same result can be obtained even if the adhesive 4 is applied to the support film 3 side.

[Effects of the Invention] As explained above, according to the method of manufacturing a blast cutting mask of the present invention, the mask adheres well to the surface of the workpiece, and
A blast cutting mask that can withstand blasting pressure without peeling or curling up, and easily peels off when it needs to be removed, has been obtained, and has the optimal characteristics as a blasting mask, and has improved cutting accuracy compared to conventional methods. Excellent improvements can be made in both cutting and cutting workability.

Therefore, it becomes possible to carve minute characters and shapes into hard materials such as glass, stone, and metal, which was previously impossible with this type of cutting method.

Specifically, in the past, the processing of flat glass required at most straight cutting with a diamond cutter or circular cutting with a diamond horn, but by using the resin mask of the present invention, it is possible to process flat glass that was previously impossible. It is possible to perform not only hollowing out of any shape, but also engraving of characters, and it is also possible to create crafts that make precise engraving expressions not only on glass plates but also on three-dimensional glass shapes.

It is also possible to engrave characters on gravestones, add depressions like natural stones to stone materials, or make depressions in natural stones to form pots.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing, in order of steps, an embodiment of the method for manufacturing a blast cutting mask of the present invention. 1... Exposure glass, 2... Original film, 3...
Support film, 4...adhesive, 5...bank, 6...
- Photosensitive resin, 6a... Non-exposed area, 6b... Exposed area, 7... Protective film, 9... Irradiation source for exposure, 10... Parallel light corrector stage, ■... Material to be cut

Claims (2)

[Claims] (1) Method for manufacturing a blast cutting mask used to adhere to the surface of a workpiece and blast high-pressure spray particles onto the exposed part of the workpiece to carve the shape of the exposed part. In this process, a photosensitive resin is poured onto a document film placed on an exposure glass in an exposure device through a non-adhesive support film to form a resin layer of a certain thickness, and then an adhesive is applied to one side. Place the applied non-adhesive protective film so that the adhesive side faces the resin layer side, press the resin layer flat from above the protective film, and then press the original film from the exposed glass side. After exposing the resin layer to parallel light for a certain period of time through a wafer, the integrated object on the original film is taken out from the exposure device, the support film is peeled off, the non-exposed part of the resin layer is washed with water, and the protective film is removed. A method for manufacturing a blast engraving mask, characterized in that the blast engraving mask is obtained by peeling it off. (2) The blast cutting mask according to claim 1, wherein the adhesive applied to one side of the non-adhesive protective film is made of a mixture of diazo resin, polyvinyl alcohol, and vinyl acetate imulsion. manufacturing method.