JPH09111475A - 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 water-bonded to a white sticking portion 3 of an enameled plate as shown in step S10 and dried for 24 hours, and then, as step S11, baking of the photographic transfer sheet is performed, and the first step baking is performed. Temperature rise, for example,
The film or ink constituting the photographic transfer sheet is completely dissolved by gradually raising the temperature to 500 to 650 ° C. over 5 hours, and the temperature rise in the second-stage baking does not bring the temperature to room temperature and the temperature is almost continuous. The temperature rising characteristic is sharper than the temperature rising characteristic of the stepwise baking, for example, the temperature is raised to 700 to 800 ° C. in one hour, and the photographic transfer sheet is baked to be vitrified.

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 400 hours in 4 to 5 hours.
The firing temperature was raised to ~ 550 ° C, the temperature was once returned to room temperature, and then the temperature was rapidly raised to 650-800 ° C in the order of minutes for main firing, but it was not possible to reproduce extremely fine photographic images. I understood.

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 provides a method for producing a enamel member, which comprises firing a enamel layer on the surface of a base member, in which a photographic transfer sheet is attached to the enamel plate and dried. After that, the first-stage firing has a temperature-raising characteristic that gradually rises, and following this first-stage firing, a temperature rise characteristic that is sharply higher than the temperature-raising characteristic of the first-stage firing is given without returning to normal temperature. It is characterized by including a baking step for a photographic transfer sheet having two-step baking.

[0007] The method for manufacturing an enamel member according to the present invention comprises:
As described above, the first-stage firing has a temperature-raising characteristic that gradually increases, and the second-stage firing that gives a temperature rise that is sharply higher than the temperature-raising characteristic of the first-stage firing without returning to normal temperature is performed. Since the photographic transfer sheet baking step with step baking is included, the photographic transfer sheet baking step fixes the photographic transfer sheet on the enameled plate and prevents cracks from occurring, resulting in extremely fine pictures and patterns. Can now be reproduced.

[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. Then, as the second stage firing work,
In step S7, a white cover coating glaze is applied as an intermediate coating, and after drying in step S8, about 80 in step S9.
Bake for 5-10 minutes at 0 ° C.

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, gold 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, a photographic transfer sheet is water-bonded to the white-colored bonding portion 3 of the enamel plate 2
Allow to dry for 4 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, FIG.
As shown in, 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 constituting the above-mentioned photographic transfer sheet are completely dissolved, and The temperature rise characteristic 2 of the second stage baking is that the photographic transfer sheet is baked and vitrified. More specifically, in the first-stage firing, the firing temperature is not increased rapidly, but for example, 10 hours per hour from 500 to 650 ° C. over 5 hours.
The temperature rise characteristic is such that the temperature rises gradually at a rate of increase of about 0 ° C., and in the subsequent second stage firing, the temperature rise characteristic is sharper than the temperature rise characteristic of the first stage firing without returning to normal temperature, for example, 1 The temperature rise characteristic is such that the temperature rises up to 700 to 800 ° C. The rising temperature of this second stage firing is 7 if the thickness of the base metal plate generally used as the side plate for elevator is 0.5 mm and 1.6 mm.
The temperature may be 40 to 760 ° 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 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.

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. It is now possible to obtain a very beautiful enamel plate with a photo transfer sheet. In addition, since the attaching portion 1a of the photographic transfer sheet on the enameled plate is white, the photographic transfer sheet can more faithfully reproduce the color of the original image.

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 the enamel member according to the present invention, after the photographic transfer sheet is attached to the enamel member and dried, the first step firing having a gradual temperature rise characteristic is carried out, and thereafter, at room temperature. Since it includes a baking process for a photographic transfer sheet that performs a second-stage baking that has a higher temperature rise characteristic than the first-stage baking and has a higher temperature rise characteristic than the first-stage baking, the photographic transfer sheet can be reliably fixed to the enamel plate, It is possible to prevent the occurrence of cracks and reproduce finely detailed pictures and patterns.

[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 step 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 Sticking part S11 Baking process for photo transfer sheet

[Procedure amendment]

[Submission date] October 30, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[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. Then, as the second stage firing work,
In step S7, a white cover coating glaze is applied as an intermediate coating, and after drying in step S8, about 80 in step S9.
Calcined at 0 ℃ 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, a photographic transfer sheet is water-bonded to the white-colored bonding portion 3 of the enamel plate 2
Allow to dry for 4 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, FIG.
As shown in, 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 constituting the above-mentioned photographic transfer sheet are completely dissolved, and The temperature rise characteristic 2 of the second stage baking is that the photographic transfer sheet is baked and vitrified. More specifically, in the first-stage firing, the firing temperature is not increased rapidly, but for example, 10 hours per hour from 500 to 650 ° C. over 5 hours.
The temperature rise characteristic is such that the temperature rises gradually at a rate of increase of about 0 ° C., and in the subsequent second stage firing, the temperature rise characteristic is sharper than the temperature rise characteristic of the first stage firing without returning to normal temperature, for example, 1 The temperature rise characteristic is such that the temperature rises up to 700 to 800 ° C. This is a photo transfer sheet
In addition to baking and vitrifying
Along with making the baked white enamel layer difficult to damage,
This has the effect of shortening the time of the entire firing process. The rising temperature of this second-stage firing is about 7 when the thickness of the base metal plate generally used as an elevator side plate is 0.5 mm.
And 40 ° C., 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] 0012

[Correction method] Change

[Correction contents]

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. It is now possible to obtain a very beautiful enamel plate with a photo transfer sheet. Moreover, since at least the sticking portion 1a of the photographic transfer sheet on the enamel plate is made white, the photographic transfer sheet was able to more faithfully reproduce the color of the original image.

 ─────────────────────────────────────────────────── ─── 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 (6)

[Claims] 1. A method for manufacturing a enamel member, which comprises firing a enamel layer on the surface of a base member, wherein a photographic transfer sheet is attached to the enamel member, dried and then gradually raised in temperature. Including the stepwise baking and the step of baking the photographic transfer sheet having the second step baking which gives a temperature rising temperature that is sharply higher than the temperature rising characteristic of the first step baking without returning to room temperature following the first step baking. A method for manufacturing a enamel member which is a feature. 2. The manufacturing method of enamel member according to claim 1, wherein in the firing step for the photographic transfer sheet, the second-stage firing is performed continuously from the first-stage firing. Method. 3. The one according to claim 1, wherein the first-stage baking imparts a temperature rise characteristic that completely melts the photographic transfer sheet, and the second-stage baking anneals the photographic transfer sheet to obtain glass. A method for manufacturing an enamel member, which is characterized by having a temperature rise characteristic to be made into a material. 4. The method according to claim 1, wherein in the first-stage firing, the temperature is slowly raised to 500 to 650.
The temperature rising characteristic of reaching ℃ is set, and the second-stage firing is 700 to 8 times faster than the temperature raising characteristic of the first-stage firing.
A method for manufacturing a enamel member, which has a temperature rise characteristic of reaching 00 ° C. 5. The one according to claim 1, wherein in the first-stage firing, the temperature is slowly raised to 500 to 650.
The temperature rise characteristic of reaching ℃, the second stage firing is 740 to 7 more rapidly than the temperature rise characteristic of the first stage firing.
A method for manufacturing an enamel member, which has a temperature rise characteristic of reaching 60 ° C. 6. The method according to claim 1, wherein the first-stage firing has a temperature rising characteristic of raising the temperature at about 100 ° C. per hour to reach 500 to 650 ° C. A method for manufacturing a enamel member, which has a temperature rising characteristic of reaching 700 to 800 ° C. in about an hour.