JPS6154258A - Manufacture of plastic sheet embossed on one surface and printed at specified position on opposite surface - Google Patents

Abstract

PURPOSE:To print the specified position of a substrate by forming a protruded display body on one surface of a light-transmittable plastic sheet substrate with a synthetic resin paste sol, fitting fixedly the display body into the recessed part of a plate-shaped material, and printing the other surface. CONSTITUTION:A display body 20 and a locating protruded body 21 are formed on one surface of a substrate 15 consisting of a light-transmittable plastic sheet by engraving with a synthetic resin paste sol to obtain an intermediate article (a). Meanwhile, a plate-shaped material 25 provided with an engraved part 24 to be fitted in with the display body 20 and an engraved part 24a to be fitted in with the protruded body 21 is formed, and many through-holes 26 are provided. The plate-shaped material 25 is placed on the base plate 28 of a screen printing press furnished with many suction holes 27 communicating with a vacuum pump VP, and sucked and fixed by the vacuum pump VP. The display body 20 and the protruded body 21 of the intermediate article (a) are fitted into the engraved parts 24 and 24a of the base plate 28, and sucked and fixed by the vacuum pump VP. Then a specified position of the substrate 15 on the opposite surface is printed 20a.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for manufacturing a plastic sheet that is molded in a convex manner on one side and printed in a fixed position on the other side (details are for display panels, nameplates, and various other uses). In particular, the present invention relates to a method for producing a plastic sheet that exhibits characteristics as a top sheet for keyboards for electronic devices, and is particularly effective as a sheet used for the surface of keyboards for electronic computers, typewriters, televisions, telephones, etc.

(Prior art) Conventionally, this type of plastic sheet was
As disclosed in Publication No. 51405, approximately 1.0jf
Some have a depth of less than f and have various letters, symbols, or patterns (hereinafter referred to as letters) on the bottom, and have a plastic sheet or leather pasted on the back.

(Problems to be Solved by the Invention) However, although conventional products have taken great pains to arrange letters in a regular manner, it is difficult to match the color of the sheet pasted to the back side of the product with the letters, resulting in an unsightly product. there were.

In order to overcome this drawback, it is theoretically possible to mold a protruding display body onto a pre-printed base material using an intaglio molding method using thermoplastic synthetic resin on one side of the base material. However, it is extremely difficult to bond and mold the printed design and the protruding display body made of intaglio while aligning them, and the loss rate is high (there is a problem that the product becomes expensive).

Therefore, the problems to be solved by the present invention are to provide a method for manufacturing a plastic sheet that allows for extremely easy positioning of the printing position for screen printing and a protruding display body, and a method for manufacturing a plastic sheet that allows multicolor printing on the sheet. Another object of the present invention is to provide a method for manufacturing a plastic sheet in which the sheet exhibits metallic luster.

(Means for Solving the Problems) In order to solve the above problems, the present invention uses a translucent plastic sheet as a base material, and intaglio molding a material made of synthetic resin paste sol on one side of the base material. to form an intermediate product with a protruding display body formed thereon, a plate-like article having an indented part into which the display body fits, and the plate-like article being screen-printed on the opposite side of the intermediate product. The display body is fitted into the indented part of the pedestal, and screen printing is performed in a fixed position on the opposite side of the intermediate product to print the intermediate product in multiple colors. The base material is a modern vapor-deposited sheet in which metal is vapor-deposited on one side of a translucent plastic sheet, and a material made of synthetic resin paste sol is intaglio molded on the plastic side of the base material to create a protruding display. Screen printing for forming an intermediate product having a body, forming a plate-like product having a recessed part into which the display body is fitted, and screen-printing the plate-like product on the opposite side of the intermediate product. The intermediate product is used as a pedestal for the machine, the display body is fitted into the recessed part of the pedestal, and a part of the metal-deposited surface of the intermediate product is screen printed with corrosion-resistant ink, and then treated with alkali or acid. Then, remove the vapor-deposited metal in the area where the anti-corrosion ink is not applied to make the area a transparent area, screen print on the metal vapor-deposited side including the transparent area, and make the intermediate product in multiple colors. This is a summary.

(Function) The manufacturing method of the present invention is based on the above-mentioned structure (in other words, in other words, various characters, symbols, patterns, or frames made of synthetic resin paste sol, or a display body in which these are assembled and formed by an intaglio molding method). Since it is molded into a protruding shape from the material, it is possible to easily form thick display bodies that cannot be achieved economically with other printing methods.Furthermore, since the display body is thick, the position of the display body can be confirmed by touch. Moreover, the sheet can withstand long-term use.

Furthermore, since a large number of different colors are printed on the opposite side of the display body, in other words on the back side, by screen printing, the position of the display body can be visually confirmed by distinguishing the colors. In addition, during the screen printing, the display body was fitted and fixed to the indented part of the pedestal which had indented parts of various shapes, so that the position of the base material, in other words, the intermediate product, remained fixed at the desired position, and the above-mentioned display Multicolor screen printing that adapts to the body can be printed precisely in the same position.

Next, the present invention will be explained in detail based on the drawings.

(Example 1) (1) is a rotary drum that can rotate freely, and the outer peripheral surface of the drum (1) is used to form various characters, symbols, patterns, frames, etc., or a display body that is a combination of these. Various recesses (2)
It forms. If necessary, a recess (2a) for forming a positioning protrusion in addition to the recess (2) is provided.
is formed, and an i-vinyl vinyl resin paste sol (4) stored in a storage tank (3) provided outside the lower part of the rotating drum (1) is supplied to the recesses (2) and (2a). When supplying the water, it rotates within the storage tank (6),
Moreover, it is supplied via the coating roller (5) which is in contact with the outer peripheral surface of the rotating drum (1). Note that the supply means is not limited to the application roller (5), and as shown in FIG.
) and a compressed air feed pipe (8), a conduit (
10), while a supply pipe (11) is fixed to the tip of the conduit (10) in parallel to the rotating drum (1), and a large number of holes (12) are formed in the supply pipe (11). Then, put the vinyl chloride resin paste sol (4) into the tank (9), close the inlet (7) with the M (6), and press the pressure feed pipe (8).
0°51 compressed air is forced into the tank (9) through the hole (
12) into the recesses (2) and (2a). When the vinyl chloride resin paste sol (4) is supplied with compressed air as described above, the Since no air is mixed into the vinyl chloride resin paste sol (4), it is advantageous in that stronger display bodies and positioning protrusions can be molded compared to those in which air is mixed.

Any excess of the vinyl chloride resin paste sol (4) supplied as described above is removed using a doctor knife ( 13) to scrape it off.

Next, the vinyl chloride resin paste sol (4) in the recesses (2) and (2M) is heated to a first heater (14) installed in front of the doctor knife (13) and inside the rotating drum (1).
The surface temperature of the U-turn drum (1) is 90~90℃.
At a temperature of 110°C, preferably 100°C, the base material (15) made of a translucent plastic sheet is heated on a rotating drum while being pressed by a pressure roll (16) provided in front of the first heater (14). (1), the base material (15) and the semi-gelled display body and the positioning protrusion body are heat-sealed in the recesses (2) and (2a), and then the press roll ( 16), the display body and the positioning protrusion are heated to 140° C. by a second heater (17) provided inside the rotating drum (1), and then the second heating It is cooled to 50°C by a cooling device (18) installed in front of the container (17) and inside the rotating drum (1).
) The display body (20) and the protruding body (2
The intermediate product (a) formed by integrally molding 1) is placed on a rotating drum (1).
The film is peeled off from the film and wound around a winding shaft (22) provided near the peeling roller (19).

On the other hand, an indented part (24) into which the display body (20) fits is formed by photolithography, and a protrusion (21) is formed as necessary.
) is formed with a recessed part (24a) that fits into the plate (25).
).

It is preferable that the shape of the engraved part (24) is the opposite shape and the same size as the display body (20). However, there is no problem even if it is increased by 151;. In addition, when forming the recessed part (24m) in which the protrusion (21) fits in the plate-like object (25) as necessary, the recessed part (24m) in which the protrusion (21) in the shape of a nine bar or prism is fitted is formed. Only 1 (24&) has the same size and reverse shape, and the indented part (24&) that fits into the display body (20) is
Although 24) has a reverse shape, it is preferable to make the indented part (24) slightly thicker than the size of the display body because it is easier to fit and fix the intermediate product (-) with the plate-like product (25). It is.

Further, the plate-like object (25) has an indented portion (24).

A large number of through holes (26) each having a diameter of approximately one order of magnitude are formed in the thickness direction of the plate (25) including holes (24, 8).

The plate-shaped object (25) configured as described above is operated by a vacuum pump (VP
) is placed on a plywood board (28) of a screen printing machine (not shown), which has a large number of continuous air intake holes (27), and serves as a pedestal (29) for the intermediate product (a). However, as mentioned above (the plate-like object (25), in other words, the pedestal (29))
was placed on a plywood board (28) of a screen printing machine equipped with a large number of intake holes (27). (28) It becomes immobile above.

The cradle attached and fixed to the screen printing machine as described above (
The display body (2o) of the intermediate product (-) cut to the required size is fitted into the engraved part (24) of 29). In addition, when the protruding body (21) is formed on the intermediate product (-), the protruding body (21)
) is fitted into the recessed part (24a), but the protrusion (2
The shape of the engraved part (24) when 1) is attached is the same as that of the display body (2).
Since the shape is slightly larger than the shape of 0), it is easy to fit the display body (20) into the concave part (24). Also, the concave part (21) into which the protrusion (21) fits The shape is the reverse shape of the protrusion (21), and the tightening force is also the same size, so the fixing action of the protrusion (21) fitted with the recessed part (24a) and the through hole (26) are vacuum pump (VP)
The suction force works (so the intermediate product (-) is fixed at a fixed position on the pedestal (29), and the intermediate product (-) moves when printing on the screen on the other side of the intermediate product (-). There is no need to
, (21) has a large number of continuous through holes (26) formed in the vacuum pump (V p )tc.
), the suction force acts on the intermediate product (-), and the intermediate product (a)
This can prevent the phenomenon of floating. Further, since the intermediate product (-) is in close contact with the top surface of the smooth surface of the pedestal (29), the printing surface of the intermediate product (-) is smooth and beautiful screen printing can be performed.

Therefore, even if the display body (20) is, for example, a protruding frame, it is possible to neatly print, for example, a number (20a) at a fixed position within the frame by screen printing.

In addition, during the screen printing, since a large number of different colors (30) and (31) were printed locally, the color can be seen through from the outside due to the translucency of the base material (15), and the display body ( 20
) is easy to visually identify, the printing does not disappear, and the design is excellent.

Furthermore, the above-mentioned large number of different color screen printing (30), (31
), when pasting the metallized film (32) on the printed surface side with a transparent adhesive (33), screen printing (30)
A product that exhibits a metallic luster in areas where (31) is not applied, making it easy to mistake the base material (15) for being metal, even though the base material (15) is a translucent plastic sheet. It becomes. Furthermore, there is a protrusion (2) around the intermediate product (-).
In the case of molded product 1), the protrusions (21) are screen-printed or the metal-deposited film (62) is laminated and then cut and removed to obtain the products shown in FIGS. 4 and 5.

(Example 2) The base material (15) was a metal vapor-deposited sheet in which aluminum was vapor-deposited on one side of a transparent polyester sheet, and the polyester side was in contact with the rotating drum (1). An intermediate product (b) in which a protruding display body (20) and a protrusion body (21) are molded on the polyester side in the same manner as in
Next, as in Example 1, the display body (20) and protrusion body (21) of the intermediate product (b) are fitted into the indented parts (24) and (24a) of the pedestal (29). With the intermediate product (b) in a fixed state, apply corrosion-resistant ink [Resist ink (Vinyl Gloss 6000) manufactured by Nichi Ink) (masking ink) (35) to the required position on the metal vapor deposition side as shown in Figure 7.
After screen printing, the corrosion-resistant ink (65) was printed by immersing it in a 5% caustic soda aqueous solution at a liquid temperature of 30'C for 5 minutes. (This portion is defined as the light-transmitting portion (66).

The intermediate product on which the transparent part (36) has been formed is fixed again on the pedestal (29) in the same manner as described above, and the printed layer (37) is printed in multiple colors by screen printing on predetermined positions including the transparent part (36). , (38
), and a product shown in FIG. 9 was obtained in which the non-printed areas had a metallic luster.

The composition of the vinyl chloride resin paste sol used in the above examples is vinyl chloride resin 100 parts (the same below weight parts) plasticizer 60 parts stabilizer 2 parts coloring agent Some amount, but it is not limited to this composition.

In addition, the materials used in the present invention (in other words, synthetic trees) include polyester, polypropylene,
Paste-sols of thermoplastic synthetic resins such as polyethylene, ABS, polyamide, etc., and paste-sols of UV-curable synthetic resins such as urethane acrylic, epoxy acrylic, silicone acrylic, etc. are used. (-) or (b), the first heater (14) and the second heater (1
7) is removed, an ultraviolet irradiation lamp is installed on the outside of the rotating drum (1) near the position of the second heater (17), and the paste sol is irradiated with the lamp for about 1.5 seconds. Smaller amount of heat compared to methods using synthetic resin,
It has the advantage that intermediate products can be made in a short time and products can be made economically.

In addition to the above-mentioned aluminum, copper, chromium, etc. can be used as the metal for the metallized film. In addition, the translucent film used is a film made of polyvinyl chloride, polypropylene, polyester, polyacrylic, polyamide, or a film treated to adhere well to the synthetic resin paste sol. .

Any corrosion-resistant ink may be used as long as it is corrosion-resistant.

Acid or Al that corrodes the deposited metal (Effects of the Invention) Since the present invention is configured as described above, a thick display body can be formed, and the printing position of the screen printing corresponding to the display body can be aligned very easily. A top sheet with a metallic luster that can be easily and accurately printed in a fixed position, and the position of the display body can be confirmed tactilely and visually without any operational errors.It can be easily used for long-term use, as well as a plastic sheet that can be used for other purposes. This has the remarkable effect of being able to be configured as follows.

[Brief explanation of drawings]

The drawings show one embodiment of a plastic sheet in which the present invention is molded on one side and printed at fixed positions on the other side.
The figure is a cross-sectional view of the intermediate product (a), Figure 3 is a cross-sectional explanatory view of the main part, Figure 4 is a plan view of the product, Figure 5 is a partially enlarged cross-sectional view of the product, and Figure 6 is an explanatory cross-sectional view of other parts. A cross-sectional view of the intermediate product (b) of the example,
Fig. 7 is a cross-sectional view of the product printed with corrosion-resistant ink, Fig. 8 is a cross-sectional view after alkali or acid treatment, Fig. 9 is a plan view of the product according to the second embodiment, and Fig. 10 is a synthetic resin paste sol. It is an explanatory view of another supply example of. (4)...Synthetic resin paste sol (15)...Base material (20)...Display body (21)...Protrusion body (24), (24&)...Intaglio portion (25) ... Plate-shaped object (28) ... Receiver (35) ... Corrosion-resistant ink (36) ... Transparent parts (a), (b) ... Intermediate product

Claims (7)

[Claims] (1) A translucent plastic sheet is used as a base material, and a material made of synthetic resin paste sol is intaglio molded on one side of the base material to form a protruding display body.
forming a plate-like object having a recessed part into which the display body is fitted; using the plate-like object as a pedestal for a screen printing machine for screen printing on the opposite side of the intermediate product; is fitted into the recessed part of the pedestal, and the intermediate product is screen printed in a fixed position on the opposite side of the intermediate product to make the intermediate product multicolored. A method of manufacturing plastic sheets with fixed position printing. (2) A metal vapor-deposited sheet made by vapor-depositing metal on one side of a translucent plastic sheet is used as a base material, and a protruding display body is formed by intaglio molding a material made of synthetic resin paste sol on the plastic side of the base material. A screen printing machine for forming a plate-like object having an indented part into which the display body fits, and screen-printing the plate-like object on the opposite side of the intermediate product. a pedestal, the display body is fitted into the recessed part of the pedestal, a portion of the metal vapor-deposited surface of the intermediate product is screen printed with corrosion-resistant ink, and then treated with alkali or acid to make it corrosion-resistant. The intermediate product is characterized in that the vapor-deposited metal in the area to which ink is not applied is removed to make the area a transparent part, and screen printing is performed on the metal-deposited side including the transparent area to make the intermediate product multicolored. A method of manufacturing plastic sheets with convex molding on one side and printing in fixed positions on the other side. (3) The material is a paste sol of thermoplastic synthetic resin or ultraviolet curable synthetic resin, and is molded in a convex manner on one side and in a fixed position on the opposite side according to claims 1 and 2. A method of manufacturing printed plastic sheets. (4) The protruding display body is formed in a convex manner on one side and on the opposite side as set forth in claims 1 and 2, wherein the protruding display body is a variety of characters, symbols, patterns, or frames. A method of manufacturing plastic sheets with fixed position printing. (5) The single-sided product according to claims 1 and 2, wherein the intermediate product further includes a protruding positioning protrusion on the protruding display body side. A method of manufacturing a plastic sheet that is molded into a convex shape and printed in a fixed position on the opposite side. (6) Claim 1, characterized in that the plate-like body is a plate-like body having a recessed part into which a protruding display body and a protruding positioning protrusion are fitted. and the method for producing a plastic sheet, which is molded in a convex manner on one side and printed at a fixed position on the other side, as described in item 2. (7) A method for producing a plastic sheet having a convex molding on one side and printing at a fixed position on the opposite side, as set forth in claim 1, characterized in that a metal vapor-deposited sheet is laminated on the screen-printed surface.