JPH07223842A - Glass product, method for forming bar code pattern on the same product and masking film for blast processing used therefor - Google Patents

Abstract

PURPOSE:To automatically and accurately distinguish plural kinds of glass products without depending upon a skilled worker and readily control glass products without fear of careless disappearance of distinguishing bar code patterns. CONSTITUTION:A bar code pattern having transparent parts 3 corresponding to black bars of a bar code pattern and opaque parts 4 and 5 corresponding to white bars and margin parts is formed by blast processing on a specific position on the surface of a main body 1 of a glass product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass product for molding a relatively large number of resin spectacle lenses, a glass product applied to an order-made plate glass, and a bar product for this glass product. The present invention relates to a code pattern forming method and a blasting masking film used in this method.

[0002]

As is well known, for example, there are many types of glass molds for molding spectacle lenses made of resin, depending on the use of the spectacle lenses and the difference in the frequency. Chooses the mold for the lens to be formed at each production lot. Such molds did not differ greatly in appearance, and thus required a high degree of skill to identify which mold they were at a glance.

[0003]

As described above, in the past, since the identification of many types of glass molds was left to the memory and visual sense of the skilled person, personnel for training and securing the skilled person are required. In addition to the large cost, it is inevitable that even a highly skilled person will sometimes make a mistake in identification.

For this reason, a barco
A method to automatically identify the above-mentioned mold by printing the printed pattern or by sticking the display label of the printed barcode on it and making the reading device read the barcode pattern is considered. Has been. However, in such a method, there is a possibility that the printing of the bar code pattern may disappear and the display label may be peeled off during each step of the production, and further, the peeling and the like may occur. There is also a risk of degrading the quality of the glass mold, which in turn causes confusion in process control.

The present invention has been made in view of the above circumstances, and a glass product capable of automatically and accurately identifying a type without depending on a skilled person and facilitating management. It is an object of the present invention to provide a method for forming a bar code pattern on this product and a masking film for blasting used in this method.

[0006]

In order to achieve this object, the glass product according to the invention of claim 1 has a black bar of a bar code pattern on a predetermined portion of the surface of the glass product body. This is a bar code pattern formed by blasting so that the corresponding parts are transparent and the parts corresponding to the white bar and the margin are opaque.

In the method for forming a bar code pattern on a glass product according to the second aspect of the present invention, a portion corresponding to a black bar of the master copy bar code pattern is formed as a mask surface portion. Using a blasting masking film, the masking layer is made to adhere to a specified place on the surface of the glass product body, and then the surface of the glass product body is blasted from the surface side of the masking layer. is there.

Furthermore, the masking film for blasting according to the third aspect of the present invention is a sheet-like base material, and is removably polymerized on one side surface of the sheet-like base material and has a master plate bar. Of the black bar, white bar and margin of the code pattern, the part corresponding to the black bar is configured as a mask surface part, and the parts corresponding to the white bar and margin are A masking layer configured as a thin non-mask surface portion that can be removed by blasting pressure in a connected state, an adhesive layer that is attached to the surface of this masking layer and is adhered to the surface of the glass product body during blasting, and A release sheet attached to the surface of the adhesive layer.

[0009]

According to the invention of claim 1, since the bar code pattern formed by blasting is formed on the surface of the glass product body, when this pattern is optically read by the reading device, The transparent portion, which is a non-blasted portion, transmits light and is detected as a black bar, and the opaque portion which has been blasted and has a frosted glass shape reflects light and is detected as a white bar or margin portion. Therefore, the type of glass product can be automatically identified by the above reading. Further, there is no concern that the above bar code pattern will disappear during the manufacturing process, and it will be easier to proceed with parts management.

According to the second aspect of the present invention, by using the masking film for blasting, the bar code pattern can be easily formed on the surface of the glass product body. According to the invention of claim 3, by preparing a specific masking film, the blasting work can be performed on various glass products at any time.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view showing a glass mold for molding a resin spectacle lens as a glass product according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a glass mold body, which is composed of a pair of upper and lower mold parts 1A and 1B. Reference numeral 2 is a bar code pattern formed by blasting on a predetermined portion of the surface of the main body 1, and the bar code of the master block 21 shown in FIG.
A portion 3 of the code pattern 22 corresponding to the black bar 23 is transparent, and portions 4 and 5 corresponding to the white bar 24 and the margin portion 25 are formed of frosted glass opaque.

As described above, if the bar code pattern 2 is formed for each type of the mold body 1, the pattern 2 is used as a laser type cleaner when forming the resin lens. By reading with such an optical reading device, the type classification can be identified automatically and accurately. Therefore, there is no need to rely on human intervention that requires skill unlike the conventional art. In particular, since the pattern 2 is formed by blasting, the pattern 2 does not disappear during the manufacturing process, and proper management can be performed.

To form the bar code pattern 2, a blasting masking film 31 as shown in FIGS. 3 and 4 is prepared. In both figures, 32 is polyethylene terephthalate (hereinafter PE) as a sheet-like base material.
The sheet 32 is made of, for example, a UV-curable resin (UV monomer) 3 on one side surface of the sheet 32.
3 is formed as a masking layer with a thickness of 0.15 mm.

In this masking layer 33, a portion 33A corresponding to the black bar 23 in the bar code pattern 22 of the block copy 21 is constituted as a mask surface portion, and a white bar 24 and a margin portion 25 are formed. Corresponding portions 33B and 33C are formed as thin non-mask surface portions that can be removed by the blast pressure during the blasting process while being connected to each other. Reference numeral 34 is an adhesive layer attached to the surface of the masking layer 33, and 35 is a release sheet attached to the adhesive layer 34.

The masking film 31 as described above is manufactured as follows. For example, a bar code system is JAN, and a block copy 21 having an 8-digit bar code pattern 22 is prepared. Examples of the bar code pattern 22 include a bar height of 8 mm, a thin bar width of 0.3 mm, and a thick bar.
The width of 0.9 mm is selected. A photographic negative film 36 as shown in FIG. 5 is produced by the master block 21 and is joined to the other side surface of the PET sheet 32.

After that, a UV monomer 33 is applied to one side surface of the sheet 32 to a thickness of 0.15 mm to form a masking layer 33. In this state, ultraviolet rays UV are irradiated from the side of the photographic negative film 36 as shown in FIG. 6 to cure the predetermined portion 33A of the masking layer 33, and then the uncured portions 33B and 33C are washed away with a predetermined chemical solution. For example, in the masking layer 33, as shown in FIG. 7, the cured portion becomes the mask surface portion 33A and the uncured portion (thin portion) becomes the non-mask surface portions 33B and 33C. After the pressure-sensitive adhesive layer 34 is applied to the surface of the masking layer 33, the release sheet 35 is applied to the surface of the pressure-sensitive adhesive layer 34, whereby the masking film 31 shown in FIG. 4 is prepared.

Next, using this masking film 31, a bar coat is formed at a predetermined position on the surface of the glass mold body 1.
The procedure for forming the pattern 2 will be described. First,
The release sheet 35 of the masking film 31 is peeled off and adhered to the surface of the mold body 1 via the adhesive layer 34 as shown in FIG. 8, and then the PET sheet 32 is removed. In this state, as shown in FIG. 9, the surface of the die main body 1 is blasted through the masking layer 33 using a shot blasting machine M.

As a result of this blasting, as shown in FIG. 10, the surface of the die main body 1 is not blasted on the portion corresponding to the mask surface portion 33A of the masking layer 33, and the master bar code pattern 22 Transparent part 3 corresponding to black bar 23
While remaining as the non-mask surface portion 33 of the masking layer 33.
The parts corresponding to B and 33C are blasted to become frosted glass, and the white bar 2 of the master plate code pattern 22
4 and the margin portion 25, and the opaque portions 4 and 5, respectively.

As an experimental example, the masking layer 33 of the masking film 31 was joined to the surface of the mold body 1 made of soda glass having a thickness of 8 mm and blasting was performed. As the blasting process, sand with a particle size of 180 mesh (84 μm) was prepared, and this sand was applied to the surface of the masking layer 33 for several tens of seconds at a pressure of 3 atm by a cyclone type shutdown blast machine (manufactured by Santec Co., Ltd.). When I injected it from the side,
The bar code pattern 2 having the same line width as the master bar code pattern 22 could be formed on the surface of the die body 1 with high precision.

Bar code pattern 2 formed in this way
Was read by a LS-2000-1000A [Fuji Electric Co., Ltd.] as a visible-light laser type reading device (scanner), and the master plate code pattern 22 It was possible to read the above bar code pattern 2 with the same accuracy as that for reading.

In the above example, the glass product is
Although the description has been made with respect to the glass mold for molding resin spectacle lenses, the present invention is not limited to such a mold and can be applied to various glass products such as plate glass as a building material. Further, the blasting masking film 3 of the above embodiment
In No. 1, an ultraviolet curable resin is used for the masking layer 33, but this layer may be made of another resin material.

[0023]

As described above, according to the first aspect of the present invention, a portion corresponding to a black bar is transparent at a predetermined portion of the surface of the glass product body by blasting, and a white bar and a margin. Since a bar code pattern is formed in which the parts corresponding to the parts are opaque, it is possible to automatically and accurately read various types of glass products using a reading device without relying on an expert. It is possible, and barco
It is easy to manage production and history without worrying that the card will disappear during the manufacturing process.

According to the invention of claim 2, the block copy
Using a masking film for blasting, where the mask surface is the part corresponding to the black bar of the code pattern, and sticking it to the surface of the glass product body, and then blasting it, the blasting process can be easily performed. -It becomes possible to form a code pattern.

Further, according to the invention of claim 3, a release sheet is adhered to the surface of the masking layer formed on one side surface of the sheet-like base material via an adhesive layer to perform blasting. Since a masking film for glass was constructed, if you prepare this masking film for each glass product in advance, you can use this masking film at any time to blast the bar.
Can perform code pattern formation work.

[Brief description of drawings]

FIG. 1 is a perspective view showing a glass mold for molding a spectacle lens made of resin, to which a glass product according to an embodiment of the present invention is applied.

[Fig. 2] Barco for the glass mold in the same embodiment
It is an explanatory view of the block copy code pattern applied to the pattern.

FIG. 3 is a perspective view showing a blasting masking film used in the example.

4 is a longitudinal sectional view of a part of the blasting masking film of FIG.

FIG. 5 is a vertical cross-sectional view showing the masking film for blast processing in a state in which a photographic negative film is mounted in the manufacturing process.

FIG. 6 is a vertical cross-sectional view showing the masking film for blast processing in a state where ultraviolet rays are radiated in the process of forming the same.

FIG. 7 is a vertical cross-sectional view showing the masking film for blasting in the state of forming a masking layer in the manufacturing process.

FIG. 8 is a vertical cross-sectional view showing the blasting masking film in a state of being adhered to the surface of the glass mold body.

FIG. 9 is a vertical cross-sectional view showing a state in which blasting is performed using the blasting masking film.

FIG. 10 is a vertical cross-sectional view showing the appearance of the surface of the glass mold body after the blasting.

[Explanation of symbols]

 1 Glass product main body 2 Bar code pattern 3 Transparent part (black bar equivalent part) 4 Opaque part (white bar equivalent part) 5 Opaque part (margin part equivalent) 21 Master copy 22 Plate master bar ― Code pattern 23 Black bar 24 White bar 25 Margin part 31 Blasting masking film 32 Sheet base material 33 Masking layer 33A Mask surface part (curing part) 33B, 33C Non-mask surface part (not yet) Cured part) 34 Adhesive layer 35 Release sheet

Claims (3)

[Claims] 1. At a predetermined portion of the surface of the glass product body, the portion corresponding to the black bar of the bar code pattern is transparent, and the portions corresponding to the white bar and the margin are opaque. A glass product characterized by forming a bar code pattern by blasting. 2. A masking layer of a blasting masking film, in which a portion corresponding to the black bar of the master copy code pattern is formed as a mask surface portion, is attached to a predetermined portion of the surface of the glass product body. Then, a bar code pattern for glass products, characterized in that the surface of the glass product body is blasted from the surface side of the masking layer.
Forming method. 3. A sheet-like base material, and an underprint bar code pattern which is releasably polymerized on one side surface of the sheet-like base material.
The black bar, the white bar and the margin of the margin correspond to the black bar, and the portions corresponding to the white bar and the margin are connected to each other. A masking layer configured as a thin non-mask surface portion that can be removed by blast pressure, an adhesive layer that is attached to the surface of this masking layer and is adhered to the surface of the glass product body during blasting, and this adhesive layer A masking film for blasting, comprising a release sheet coated on the surface of the.