JPH09111477A - Manufacturing method of enamel member - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a method for manufacturing an enamel member capable of reproducing an extremely fine photographic image using a photographic transfer sheet. SOLUTION: A photographic transfer sheet is wet-bonded with a white coating cover 4 on a white sticking portion 3 of a enamel plate shown in step S10, dried and then fired for the photographic transfer sheet in step S11. One-step firing temperature increase, for example, 500 to 650 ° over 5 hours
When the temperature of the photographic transfer sheet is gradually raised to C, and the temperature of the second stage baking is raised, the photographic transfer sheet is baked almost continuously without being returned to room temperature with a temperature rise characteristic that is sharper than that of the first stage. The pictures and patterns on the photographic transfer sheet are faithfully reproduced without being affected by the background.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an enamel member formed by firing a color transfer sheet on the surface.

[0002]

2. Description of the Related Art Generally, enamel members are used in various fields such as car side plates for elevators, taking advantage of the robustness and design advantage of enamels. For example, Japanese Patent Application No. 3-332816 discloses an enamel member. A method of manufacturing an elevator car side plate using an enamel plate has been proposed. A conventional enamel member of this type is formed from a base metal plate having a predetermined thickness into a predetermined shape by a can-making operation, performing a surface treatment such as degreasing and pickling, and then performing nickel plating. , A three-stage firing operation was repeated. The three-stage firing operation is as follows. First, the surface of the nickel-plated base metal plate is undercoated with a glaze, dried and fired, and in the second stage, the glaze is middle-coated, dried and fired. In the third step, the glaze is overcoated, dried and fired.

On the other hand, Japanese Patent Application Laid-Open No. Hei 5-318990 describes a technique in which a color photographic transfer sheet is fired on the surface of a ceramic or the like in order to enhance the aesthetics and design of the surface of the ceramic or the like. ing.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have studied firing a color photographic transfer sheet on the surface of an enamel member in order to give the enamel member a sense of high-grade design. However, based on the experience so far, the photographic transfer sheet is attached to the surface of the enamel member, and after drying, the temperature rise rate of 100 ° C. per hour is used for 4 to 5 hours.
The firing temperature was raised from 0 to 550 ° C, the temperature was once returned to room temperature, and then the temperature was rapidly raised to 650 to 800 ° C on the order of minutes to perform the main firing. I found that it could not be reproduced.

It is an object of the present invention to provide a method for manufacturing an enamel member capable of reproducing a very fine color photographic image using a photographic transfer sheet.

[0006]

In order to achieve the above object, the present invention is a method for producing a enamel member in which a enamel layer is fired on the surface of a base member, a photographic transfer sheet is stuck on the enamel layer, and dried and fired. In the above method, the sticking portion for sticking the photographic transfer sheet is made white by applying a white coating cover, and then the photographic transfer sheet is baked.

[0007] The method for manufacturing an enamel member according to the present invention comprises:
Since the white cover coating is applied to the above-mentioned base material and the photographic transfer sheet is baked, the color of the photographic transfer sheet can be surely reproduced without being affected by the cover coating, and a very fine picture or pattern can be obtained. It became possible to transfer etc.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flowchart showing a method of manufacturing an enamel plate as an enamel member according to an embodiment of the present invention. In the figure, the left side shows the manufacturing process of the photographic transfer sheet, and the right side shows the manufacturing process of the enamel plate and the subsequent process of baking the photographic transfer sheet on the enamel plate. First, the production of the enamel plate will be described. In step S1, a base metal plate having a predetermined thickness, for example, 0.35 to 0.5 mm, is formed into a predetermined shape by a can making operation, and in step S2, degreasing and acidification of the surface thereof are performed. After performing surface treatment such as washing, nickel plating is applied in step S3, and then, as the first-step firing operation, the surface of the nickel-plated base metal plate is undercoated with the glaze of the ground coating in step S4, After drying at step S5, about 8 as step S6
Bake at 00 ° C. Usually, this ground coating is black. Subsequently, as the second-step firing operation, in step S7, the glaze of the white coating cover is applied in the middle step and dried in step S8, and then in step S9, about 800 °
Bake for 5 to 10 minutes.

On the other hand, in the manufacturing process of the photographic transfer sheet, a photographic print or a negative or positive film is prepared in advance as a step S20, and this is subjected to trimming color separation in a step S21. That is, the original image prepared as a photographic print or a negative or positive film is color-separated into three primary colors (yellow, magenta, cyan) and black. After that, in step S22, the trimming color separation is carried out to obtain a plate making, which is a uniform four plates of the yellow plate, magenta plate, cyan plate, and black plate regardless of the number of colors of the original image. To reproduce. As a pigment, praseodymium is used for the yellow plate, envelop is used for the magenta plate, cobalt is used for the cyan plate, and manganese is mixed for the black plate. A polyester film is used as a thin film to hold these, and each plate is printed and photographed in step S23. Obtain a transfer sheet. Next, in step S24, the surface of the photographic transfer sheet is coated with, for example, urethane to form a photographic transfer sheet protective film, and the photographic transfer sheet is completed. Since this photographic transfer sheet protective film prevents the surface of the photographic transfer sheet from being scratched thereafter, it contributes to making the surface of the photographic transfer sheet more beautiful and faithfully reproducing the original image after the completion of all steps described later.

Next, as shown in step S10, the photographic transfer sheet is water-bonded to the sticking portion 3 having the white enamel plate white with the white coating cover 4 and dried for 24 hours. Then, baking for a photo transfer sheet is performed as step S11. This baking process for a photographic transfer sheet is characterized in that it is performed almost continuously without returning to room temperature due to at least two-step temperature rising characteristics. That is, as shown in FIG.
The temperature rise characteristic 1 of the first-stage baking in the baking step for the photographic transfer sheet is that the film and ink forming the photographic transfer sheet described above are completely dissolved, and Temperature rise characteristic 2
Is a material for baking a photographic transfer sheet to make it vitrified. More specifically, in the first-stage firing, the firing temperature is not rapidly raised, but is, for example, a temperature at which the firing temperature is gradually raised from 500 to 650 ° C over 5 hours at a rate of about 100 ° C per hour. In the subsequent second-stage firing, the temperature-raising characteristic is sharper than the temperature-rise characteristic of the first-stage firing, and is almost continuous in the subsequent second-stage firing.
For example, the temperature rise characteristic is such that the temperature rises to 700 to 800 ° C. in one hour. The rising temperature of this second stage firing is
If the thickness of the base metal plate generally used as an elevator side plate is 0.5 mm and 1.6 mm, it is 740 to 76.
The temperature may be 0 ° C., and may be determined in consideration of the conditions of the base metal plate.

Thereafter, in step S12, the glaze corresponding to the designated finish color of the surface is overcoated except for the sticking portion 3 of the photographic transfer sheet, and dried in step S13, and then step S14.
As about 720 to 740 ° C for about 10 minutes. After that, flax coating is performed after step S15 or the above-mentioned baking step for the photographic transfer sheet. This is performed with transparent glaze for the purpose of ensuring the same luster as the enamel plate and improving the abrasion resistance of the photographic transfer sheet. The surface of the photographic transfer sheet is coated. At this time,
The protective film of the photo transfer sheet that has already been coated with urethane has melted and evaporated in the above-mentioned baking process for the photo transfer sheet, and the surface of the photo transfer sheet has been glossed by the flax coating to give abrasion resistance, It is possible to retain the quality.

By this baking step for the photographic transfer sheet, the film and ink constituting the photographic transfer sheet can be completely dissolved, and the particulate state can be vitrified to bake the photographic transfer sheet. Experiments have revealed that it is possible to fix it and reproduce its finely detailed pictures and patterns. Further, if the above-mentioned baking step for a photographic transfer sheet is not carried out, cracks may be generated inside and the beauty of the photographic transfer sheet may be impaired. This is because when the firing was stopped near the rising temperature of the first stage firing in the firing process for the photo transfer sheet and the temperature was returned to room temperature, the base metal thin plate had already expanded in the temperature range where the enamel glaze just softened. It is considered that a phenomenon occurs in which the enamel layer is crushed when the expansion of the base metal thin plate returns to the original temperature after returning to room temperature. This phenomenon does not appear on the surface near the elevated temperature of the first-stage firing, and for example,
When the process is advanced without increasing the temperature of the second stage firing and a temperature of about 800 degrees is applied in the main firing of step S16,
Although the uppermost surface of the enamel layer melts and cracks appear inside, cracks are generated by the baking process for the photographic transfer sheet, which is performed almost continuously without returning to room temperature due to at least two temperature rise characteristics as described above. You can now prevent. Moreover, since the sticking portion 1a of the photographic transfer sheet in the enamel plate is the white coating cover 4, the photographic transfer sheet can more faithfully reproduce the color of the original image, and a very beautiful enamel plate with a photographic transfer sheet can be obtained. Is now possible.

In the above-described embodiment, the photographic transfer sheet is fired on the enamel plate which is the side plate for the elevator.
The present invention is not limited to the plate-shaped body, and can be applied to other shapes of enamel members.

[0014]

As described above, in the method for manufacturing a enamel member according to the present invention, a white coating cover is used as a base for attaching the photographic transfer sheet, so that the photographic transfer sheet is more faithful to the original image color and color. It is possible to reproduce detailed pictures and patterns, and it is now possible to make very beautiful transfers.

[Brief description of the drawings]

FIG. 1 is a flowchart showing manufacturing steps of a method for manufacturing an enamel member according to an embodiment of the present invention.

FIG. 2 is a temperature rise characteristic diagram of a baking process for a photographic transfer sheet according to the method for manufacturing the enamel member shown in FIG.

[Explanation of symbols]

 1, 2 temperature rise characteristics 3 pasting part 4 coating cover S11 baking process for photo transfer sheet

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[Procedure amendment]

[Submission date] October 30, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flowchart showing a method of manufacturing an enamel plate as an enamel member according to an embodiment of the present invention. In the figure, the left side shows the manufacturing process of the photographic transfer sheet, and the right side shows the manufacturing process of the enamel plate and the subsequent process of baking the photographic transfer sheet on the enamel plate. First, the production of the enamel plate will be described. In step S1, a base metal plate having a predetermined thickness, for example, 0.35 to 0.5 mm, is formed into a predetermined shape by a can making operation, and in step S2, degreasing and acidification of the surface thereof are performed. After performing surface treatment such as washing, nickel plating is applied in step S3, and then, as the first-step firing operation, the surface of the nickel-plated base metal plate is undercoated with the glaze of the ground coating in step S4, After drying at step S5, about 8 as step S6
Bake at 00 ° C. Usually, this ground coating is black. Subsequently, as the second-step firing operation, in step S7, the glaze of the white coating cover is applied in the middle step and dried in step S8, and then in step S9, about 800 °
Calcined at C until in 5-10 minutes.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

Next, as shown in step S10, the photographic transfer sheet is water-bonded to the sticking portion 3 having the white enamel plate white with the white coating cover 4 and dried for 24 hours. Then, baking for a photo transfer sheet is performed as step S11. This baking process for a photographic transfer sheet is characterized in that it is performed almost continuously without returning to room temperature due to at least two-step temperature rising characteristics. That is, as shown in FIG.
The temperature rise characteristic 1 of the first-stage baking in the baking step for the photographic transfer sheet is that the film and ink forming the photographic transfer sheet described above are completely dissolved, and Temperature rise characteristic 2
Is a material for baking a photographic transfer sheet to make it vitrified. More specifically, in the first-stage firing, the firing temperature is not rapidly raised, but is, for example, a temperature at which the firing temperature is gradually raised from 500 to 650 ° C over 5 hours at a rate of about 100 ° C per hour. In the subsequent second-stage firing, the temperature-raising characteristic is sharper than the temperature-rise characteristic of the first-stage firing, and is almost continuous in the subsequent second-stage firing.
For example, the temperature rise characteristic is such that the temperature rises to 700 to 800 ° C. in one hour. This is a photo transfer sheet baked
In addition to vitrification and vitrification, white fired in step S9
The enamel layer of color is hard to damage and the entire firing
This has the effect of shortening the process time. The rising temperature of the second-stage firing is about 740 ° C. when the thickness of the base metal plate generally used as an elevator side plate is 0.5 mm.
And it may if Do et 7 60 ° C is 1.6 mm, may be determined by considering the condition of the base metal plate.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

Thereafter, in step S12, the glaze corresponding to the designated finish color of the surface is overcoated except for the sticking portion 3 of the photographic transfer sheet, and dried in step S13, and then step S14.
Calcination at about seven hundred twenty to seven hundred forty ° C or at about 10 minutes as. Then, in step S15 or after the photographic transfer sheet baking step described above, flax coating is performed.
This is to coat the surface of the photographic transfer sheet with a transparent glaze for the purpose of ensuring the same gloss as the enamel plate and improving the abrasion resistance of the photographic transfer sheet. At this time, the protective film of the photographic transfer sheet already coated with urethane was melted and evaporated in the above-mentioned baking step for the photographic transfer sheet, and the surface of the photographic transfer sheet was polished by the FLUXS coating to provide abrasion resistance. And can hold beauty.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuo Hanamura 3-14-8 Kitasuna, Koto-ku, Tokyo Hanamura Hollow Industry Co., Ltd. (72) Inventor Hiroshi Goko 1-6, Kandanishiki-cho, Chiyoda-ku, Tokyo Incorporated company Hitachi Building System Service

Claims (2)

[Claims] 1. An enamel layer is fired on the surface of a base member,
In the method for producing a enamel member, in which a photographic transfer sheet is stuck on it, dried and baked, the sticking part to which the photographic transfer sheet is stuck is made white by applying a white coating cover, and then the photographic transfer sheet is baked. A method for manufacturing an enamel member, characterized in that 2. The photographic transfer sheet according to claim 1, wherein the photographic transfer sheet is fired in a first stage having a gradual temperature rise characteristic and continuously in the first stage constitution without returning to room temperature. A method for manufacturing a enamel member, characterized in that a second-stage firing is performed in which the temperature is raised to a higher temperature more rapidly than in the first-stage firing.