CN108107706B - Micro-painted enamel dial and manufacturing method thereof - Google Patents
Micro-painted enamel dial and manufacturing method thereof Download PDFInfo
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- CN108107706B CN108107706B CN201810051369.3A CN201810051369A CN108107706B CN 108107706 B CN108107706 B CN 108107706B CN 201810051369 A CN201810051369 A CN 201810051369A CN 108107706 B CN108107706 B CN 108107706B
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
- G04B47/04—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached ornaments or amusement apparatus
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
- C04B41/515—Other specific metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/88—Metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention discloses a micro-painted enamel dial and a manufacturing method thereof, wherein the micro-painted enamel dial comprises a ceramic dial body, a pointer mounting hole is formed in the center of the ceramic dial body, a positioning pit for mounting pins of a watch movement is formed in the back face of the ceramic dial body, a positioning groove for positioning a watch crown is formed in the side face of the ceramic dial body, and an enamel glaze layer is arranged on the front face of the ceramic dial body. The ceramic dial body is manufactured by an isostatic pressing process and a high-precision numerical control surface grinding machine, has accurate size and smooth surface, can be completely attached to the surface of a machine core, and avoids the problem of serious deformation when enamel is fired on the existing metal dial; and the back of ceramic dial plate body is equipped with the location pit that is used for installing the stitch of wrist-watch core, the side is equipped with the positioning groove of location wrist-watch crown, can with current conventional wrist-watch core adaptation installation, can not appear the phenomenon that the pointer was installed or is blocked the needle.
Description
Technical Field
The invention relates to a dial, in particular to a micro-painted enamel dial and a manufacturing method thereof.
Background
The enamel manufacturing process is divided into three types of cloisonne enamel, internally filled enamel and enamel, wherein the enamel is painted on the surface of a matrix by using enamel glaze slurry with a five colors and six colors, and a colored drawing decorative pattern, also called 'enamel drawing', is formed after high-temperature firing, and has very high collection and ornamental values.
The enamel dial plate is a clock accessory integrating decoration and functions, adopts enamel technology to form decorative patterns on the surface, and has to meet the assembly requirements, including the very strict dimensional tolerance requirements of the diameter, flatness, positioning holes (grooves), central holes and the like of the dial plate, besides the artistic effect of the enamel surface, especially the dial plate of a mechanical watch. The existing watch dial is generally formed by stamping, and can better meet the assembly requirement. However, the enamel glaze layer of the enamel dial plate needs to be fired at high temperature, and the thickness of the dial plate is very thin, so that deformation such as deflection and the like is easy to occur during firing; the final assembly is caused by the fact that the hands cannot be mounted on the enamel dial or the hands are clamped with the surface of the enamel dial.
For this reason, ceramic dials have been used to make enamel dials instead of traditional metal dials. The ceramic dial plate has high temperature resistance and can not deform during firing. However, in the conventional ceramic enamel dial, the glaze material is not matched with the thermal expansion coefficient of the ceramic dial, so that the glaze layer is difficult to firmly combine with the ceramic dial, and the glaze breakage is easy to occur. Moreover, the whole thickness of the existing ceramic enamel dial is larger, so that people feel heavy; in addition, due to the defects of the structural design and the manufacturing process, the precision of the ceramic dial plate is insufficient, the assembly requirement of the watch cannot be met, and the ceramic dial plate cannot be matched with the movement of the watch. Meanwhile, the ceramic dial plate is poor in texture and cannot be applied to high-grade watches, so that the development of enamel technology in the watch field is limited.
Disclosure of Invention
The invention aims to solve the defects and the shortcomings of the prior art and provide a micro-painted enamel dial and a manufacturing method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a micro-painted enamel dial plate, includes ceramic dial plate body, the center of ceramic dial plate body is equipped with the pointer mounting hole, the back of ceramic dial plate body is equipped with the location pit that is used for installing the stitch of wrist-watch core, the side of ceramic dial plate body is equipped with the positioning groove that is used for fixing a position wrist-watch crown, the front of ceramic dial plate body is equipped with enamel glaze layer.
Further, the side surface and the back surface of the ceramic dial body are plated with metal titanium layers.
Further, the thickness of the enamel glaze layer is 0.15-0.25 mm, and the enamel glaze layer comprises a base glaze layer of a bottom layer and an enamel glaze layer drawn under a microscope.
A manufacturing method of a micro-painted enamel dial plate comprises the following steps:
(1) The method comprises the steps of taking nano zirconia as a raw material, adopting an isostatic compaction process to manufacture a ceramic dial blank, arranging a pointer mounting hole in the center of the ceramic dial blank, pressing a positioning pit for mounting pins of a watch movement on the back of the ceramic dial blank, and arranging a positioning groove for positioning a watch crown on the side surface of the ceramic dial blank;
(2) Grinding the ceramic dial blank by adopting a high-precision numerical control surface grinding machine to obtain a ceramic dial body;
(3) An adaptive pure silver tube is embedded in a pointer mounting hole of a ceramic dial body, the lower end of the pure silver tube is leveled with the back surface of the ceramic dial body, the upper end of the pure silver tube is higher than the front surface of the ceramic dial body by 0.1-0.15 mm, and then the pure silver tube is cleaned and dried, and the front surface of the ceramic dial body faces upwards and is placed on a titanium net;
(4) Uniformly screening a layer of medium-high temperature white glaze powder on the front surface of the ceramic dial body, enabling the powder surface of the medium-high temperature white glaze powder to be leveled with the upper end of the pure silver tube, firing the powder surface of the medium-high temperature white glaze powder to form a ground glaze layer, pushing the surface of the ground glaze layer to be leveled after cooling, firing the powder surface of the ground glaze layer for the second time, and dismantling the pure silver tube;
(5) Modulating the medium-low temperature glaze according to the designed dial pattern color, and drawing a required pattern on the front surface of the ceramic dial body by using the modulated medium-low temperature glaze under a microscope;
(6) Drying the glaze on the ceramic dial body, firing the glaze to form an enamel glaze layer on the drawn medium-low temperature glaze, and taking out and cooling the enamel glaze layer to obtain a micro-painted enamel dial semi-finished product;
(7) Thoroughly degreasing, cleaning and drying the micro-painted enamel dial semi-finished product, and depositing a layer of metal titanium layer on the back and the side of the micro-painted enamel dial semi-finished product by adopting a vacuum ion plating method;
(8) Finally, the pins of the watch movement are vertically fixed in the positioning pits, and a finished product of the micro-painted enamel dial is obtained.
Further, the thickness of the ceramic dial plate blank is 0.9-1.0 mm, the diameter of the pointer mounting hole is 1.8-2.0 mm, the depth of the positioning pit is 0.5-0.6 mm, the diameter is 1.2-1.5 mm, the width of the positioning groove is 0.2-0.25 mm, and the depth is 0.1-0.15 mm.
Preferably, in the step (1), the process conditions for manufacturing the ceramic dial blank are as follows: the cold isostatic pressing pressure is 230-280 MPa, and the time is 30-60 seconds; the sintering temperature is 1400-1450 ℃, and the sintering time is 2-3 h.
Further, in the step (2), a high-precision numerical control surface grinding machine is adopted to grind the ceramic dial plate blank to be 0.3-0.4 mm thick; wherein, the front surface of the ceramic dial blank is ground to be reduced by 0.1-0.2 mm in thickness, the back surface is ground to be reduced by 0.4-0.5 mm in thickness, and the surface roughness of the ground ceramic dial blank is 13-16 mu m.
Further, in the step (4), the thermal expansion coefficient of the medium-high temperature white glaze powder is 8 multiplied by 10 -6 /℃～9×10 -6 The temperature of the two firing is 900 ℃, wherein the time of the first firing is 50-70 s, and the time of the second firing is 25-30 s.
Further, in the step (5), the thermal expansion coefficient is 6×10 -6 /℃～8×10 -6 The medium-low temperature glaze material at the temperature of/DEG C is taken as a raw material, and is ground to 320-400 meshes, then is respectively placed in a color mixing disc according to the color, and the medium-low temperature glaze material with each color is respectively and uniformly rolled by a color mixing knife and turpentine until the viscosity value is 5-10 Pa.S; when the mid-sole temperature glazes with different colors are mixed and modulated, the mixing is carried out according to the sequence of light color and dark color; the arrangement of the patterns determines the direction according to the positioning grooves, so that the problem that the direction of the patterns cannot be determined when the patterns of the enamel dial are drawn in the prior art is solved.
When the micro-painted enamel dial is required to be provided with time scales, before the pattern drawing in the step (5) is carried out, a mould provided with a time scale groove is assembled on the ceramic dial body, a center column of the mould is inserted into a pointer mounting hole, the position of the mould is adjusted through the center line of the pointer mounting hole and a positioning groove, glaze is mixed with 320-400 meshes of glaze powder, the mixed glaze is filled in the time scale groove of the mould under a microscope, and after the filled glaze is dried, the mould is taken away, so that the front surface of the ceramic dial body is painted with the time scales.
Further, in the step (6), the firing temperature is 700-800 ℃ and the firing time is 50-60 s, and when the enamel layer is taken out and cooled, if the enamel layer needs to be filled with glaze, the enamel layer needs to be fired again in a furnace. For the glaze which is easy to change color in the firing process, after other glaze materials which are difficult to change color are fired, the glaze materials are painted on the dial plate and fired, so that the firing times of the glaze materials which are easy to change color can be reduced, and the possibility of changing color of the glaze materials is reduced.
Preferably, in the step (7), before the micro-painted enamel dial semi-finished product is coated, the front surface of the micro-painted enamel dial semi-finished product is painted and covered by an oil pen, so that the metal titanium can be prevented from adhering to the front surface of the micro-painted enamel dial semi-finished product.
Preferably, in the step (8), the pins of the watch movement are vertically pressed into the positioning pits by adopting a vertical clamping device, and then the pins are fixedly welded into the positioning pits by using Ag-30Cu-10Sn low-temperature brazing filler metal.
Compared with the prior art, the invention has the beneficial effects that:
1. the ceramic dial body is made of nano zirconia material, has good high temperature resistance and corrosion resistance, has strong mechanical strength, hardness and toughness, also has good chemical stability and biocompatibility, has good thermal expansion matching property with the medium-low temperature enamel glaze, can form slight compressive stress on the glaze layer during firing, is favorable for firm combination between the glaze layer and the dial, and cannot deform;
2. the ceramic dial body is manufactured by an isostatic pressing process and a high-precision numerical control surface grinding machine, has accurate size and smooth surface, can be completely attached to the surface of a machine core, and avoids the problem of serious deformation when enamel is fired on the existing metal dial; the back of the ceramic dial body is provided with a positioning pit for mounting pins of the watch movement, and the side face of the ceramic dial body is provided with a positioning groove for positioning a watch crown, so that the ceramic dial body can be mounted in an adaptive manner with the conventional watch movement, and the phenomenon that the watch needle cannot be mounted or is blocked can be avoided;
3. the micro-painted enamel dial manufactured by the manufacturing method has the overall thickness of 0.45-0.65 mm, and is obviously thinner than the existing ceramic dial, and the thickness of the existing ceramic dial is generally more than 1.7mm. The micro-painted enamel dial has enamel decoration aesthetic feeling and dial function, the enamel glaze layer of the enamel glaze layer is painted by a microscope, the pattern is fine, the texture is good, and the high-grade watch can be also suitable for;
4. according to the invention, the metal titanium layer is deposited on the back and the side of the micro-painted enamel dial by adopting a vacuum ion plating method, the obtained metal titanium layer is very thin, the adhesion force of the metal titanium layer is good, the compactness is high, and the surface plate can be subjected to long-acting decoration and protection.
Drawings
FIG. 1 is a schematic back view of a micro-painted enamel dial of the present invention;
FIG. 2 is a radial cross-sectional view of a micro-drawn enamel dial of the invention.
In the figure, a ceramic dial body 1, a pointer mounting hole 2, a positioning pit 3, a positioning groove 4, an enamel glaze layer 5, a metal titanium layer 6, a ground glaze layer 7, an enamel glaze layer 8 and pins 9.
Detailed Description
Example 1
This embodiment provides a micro-painted enamel dial plate, as shown in fig. 1 and 2, including ceramic dial plate body 1, the center of ceramic dial plate body is equipped with pointer mounting hole 2, and the back of ceramic dial plate body is equipped with the location pit 3 that is used for installing the stitch 9 of wrist-watch core, and the side of ceramic dial plate body is equipped with the positioning groove 4 that is used for fixing a position the wrist-watch crown, and the front of ceramic dial plate body is equipped with enamel glaze layer 5, and the side and the back of ceramic dial plate body have plated metallic titanium layer 6. The enamel glaze layer comprises a primer layer 7 of a bottom layer and an enamel glaze layer 8 of an upper layer which is drawn under a microscope.
The manufacturing method of the micro-painted enamel dial plate comprises the following steps:
(1) The nano zirconia is used as a raw material, a ceramic dial blank with the thickness of 0.95mm is manufactured by adopting an isostatic pressing process according to the designed dial shape, the cold isostatic pressing pressure is 250MPa, and the time is 45 seconds; the sintering temperature is 1420 ℃, and the sintering time is 2.5h; a watch hand mounting hole with the diameter of 1.9mm is arranged in the center of a ceramic dial plate blank, a positioning pit for mounting pins of a watch movement is pressed on the back surface of the watch hand mounting hole, and a positioning groove for positioning a watch crown is arranged on the side surface of the watch hand mounting hole; the depth of the positioning pit is 0.55mm, the diameter is 1.35mm, the width of the positioning groove is 0.22mm, and the depth is 0.12mm;
(2) Grinding the ceramic dial plate blank to a thickness of 0.35mm by adopting a high-precision numerical control surface grinding machine, wherein the front surface of the ceramic dial plate blank is ground to a thickness of 0.15mm, and the back surface of the ceramic dial plate blank is ground to a thickness of 0.45mm, so as to obtain a ceramic dial plate body, and the surface roughness of the ceramic dial plate body is 14 mu m;
(3) A pure silver pipe with the wall thickness of 0.45mm is embedded in a pointer mounting hole of a ceramic dial body, the lower end of the pure silver pipe is leveled with the back surface of the ceramic dial body, the upper end of the pure silver pipe is higher than the front surface of the ceramic dial body by 0.12mm, then the pure silver pipe is cleaned by detergent and washed by water, and the front surface of the ceramic dial body faces upwards after being dried and is placed on a titanium screen;
(4) The thermal expansion coefficient was 8.5X10 with a 150 mesh sieve -6 Uniformly screening the middle-high temperature white glaze powder at the temperature of/DEG C on the front surface of the ceramic dial body, enabling the powder surface of the middle-high temperature white glaze powder to be leveled with the upper end of the pure silver tube, firing at 900 ℃ for 60s, enabling the middle-high temperature white glaze powder layer to form a ground glaze layer, pushing the surface of the ground glaze layer to be leveled by using 800-mesh sand paper after cooling, firing at 900 ℃ for 30s to obtain a ground glaze layer with a flat surface, and dismantling the pure silver tube;
(5) The thermal expansion coefficient is 7 multiplied by 10 -6 Grinding the medium-low temperature glaze at the temperature of/DEG C to 350 meshes, then respectively placing the glaze in a palette according to the colors, and respectively grinding the medium-low temperature glaze with various colors by using a palette knife and turpentine to be uniform until the viscosity value is 7 Pa.S; mixing the medium-low temperature glazes with different colors to prepare medium-low temperature glazes corresponding to the designed dial pattern colors, wherein the medium-low temperature glazes are mixed in the sequence from light color to dark color during modulation; dipping the prepared medium-low temperature glaze with a painting brush, drawing patterns on the front surface of the ceramic dial body by means of a microscope, wherein the arrangement direction of the patterns is determined according to the positioning grooves on the side surface of the ceramic dial body;
(6) Thoroughly drying the glaze on the ceramic dial body, then firing the ceramic dial body at 750 ℃ for 55s to enable the drawn medium-low temperature glaze to form an enamel glaze layer, and taking out and cooling the ceramic dial body to obtain a micro-painted enamel dial semi-finished product; taking out and cooling, observing the glaze, and if the enamel glaze layer needs to be filled with glaze, putting the enamel glaze layer into a furnace for re-firing; for the glaze which is easy to change color in the firing process, after other glaze which is difficult to change color is fired, the glaze is painted on the dial plate, and then firing is performed; the total thickness of the micro-painted enamel dial semi-finished product is 0.55mm, and the total thickness of the white base glaze layer and the enamel glaze layer is 0.2mm;
(7) Thoroughly degreasing, cleaning and drying a micro-painted enamel dial semi-finished product, painting and covering the front surface of the micro-painted enamel dial semi-finished product by using an oily pen, then placing the micro-painted enamel dial semi-finished product into a PVD vacuum plating furnace, and depositing a layer of metal titanium layer on the back surface and the side surface of the micro-painted enamel dial semi-finished product by adopting a vacuum ion plating method, wherein the deposition time is 45min;
(8) One end of a pin of the watch movement is vertically pressed in the positioning pit by a vertical clamping device, and then the pin is fixedly welded in the positioning pit by Ag-30Cu-10Sn low-temperature brazing filler metal, so that a micro-painted enamel dial finished product is obtained.
Example 2
The modification of this example 2 is based on example 1, except that the process conditions for manufacturing the micro-painted enamel dial and the dimensional requirements for the micro-painted enamel dial in this example 2 are different from those of example 1, and the following details are shown:
in this embodiment 2, the method for manufacturing the micro-painted enamel dial comprises the following steps:
(1) The nano zirconia is used as a raw material, a ceramic dial blank with the thickness of 1.0mm is manufactured by adopting an isostatic pressing process according to the designed dial shape, the cold isostatic pressing pressure is 280MPa, and the time is 30 seconds; the sintering temperature is 1450 ℃, and the sintering time is 2 hours; a watch needle mounting hole with the diameter of 2.0mm is arranged in the center of a ceramic dial plate blank, a positioning pit for mounting pins of a watch movement is pressed on the back surface of the watch needle mounting hole, and a positioning groove for positioning a watch crown is arranged on the side surface of the watch needle mounting hole; the depth of the positioning pit is 0.6mm, the diameter is 1.5mm, the width of the positioning groove is 0.25mm, and the depth is 0.15mm;
(2) Grinding the ceramic dial plate blank to a thickness of 0.4mm by adopting a high-precision numerical control surface grinding machine, wherein the front surface of the ceramic dial plate blank is ground to a thickness of 0.2mm, and the back surface of the ceramic dial plate blank is ground to a thickness of 0.4mm, so as to obtain a ceramic dial plate body, and the surface roughness of the ceramic dial plate body is 16 mu m;
(3) A pure silver pipe with the wall thickness of 0.5mm is embedded in a pointer mounting hole of a ceramic dial body, the lower end of the pure silver pipe is leveled with the back surface of the ceramic dial body, the upper end of the pure silver pipe is higher than the front surface of the ceramic dial body by 0.15mm, then the pure silver pipe is cleaned by detergent and washed by water, and the front surface of the ceramic dial body faces upwards after being dried and is placed on a titanium screen;
(4) The thermal expansion coefficient was 9X 10 by using 150 mesh sieve -6 Uniformly screening the middle-high temperature white glaze powder at the temperature of/DEG C on the front surface of the ceramic dial body, enabling the powder surface of the middle-high temperature white glaze powder to be leveled with the upper end of the pure silver tube, firing at 900 ℃ for 70 seconds, enabling the middle-high temperature white glaze powder layer to form a ground glaze layer, pushing the surface of the ground glaze layer to be leveled by using 800-mesh sand paper after cooling, firing at 900 ℃ for 30 seconds to obtain a ground glaze layer with a flat surface, and dismantling the pure silver tube;
(5) The thermal expansion coefficient is 8 multiplied by 10 -6 Grinding the medium-low temperature glaze at the temperature of/DEG C to 400 meshes, then respectively placing the glaze in a palette according to the colors, and respectively grinding the medium-low temperature glaze with various colors by using a palette knife and turpentine to be uniform until the viscosity value is 10 Pa.S; mixing the medium-low temperature glazes with different colors to prepare medium-low temperature glazes corresponding to the designed dial pattern colors, wherein the medium-low temperature glazes are mixed in the sequence from light color to dark color during modulation; dipping the prepared medium-low temperature glaze with a painting brush, drawing patterns on the front surface of the ceramic dial body by means of a microscope, wherein the arrangement direction of the patterns is determined according to the positioning grooves on the side surface of the ceramic dial body;
(6) Thoroughly drying the glaze on the ceramic dial body, then firing the glaze at 800 ℃ for 50s to enable the drawn medium-low temperature glaze to form an enamel glaze layer, and taking out and cooling the enamel glaze layer to obtain a micro-painted enamel dial semi-finished product; taking out and cooling, observing the glaze, and if the enamel glaze layer needs to be filled with glaze, putting the enamel glaze layer into a furnace for re-firing; for the glaze which is easy to change color in the firing process, after other glaze which is difficult to change color is fired, the glaze is painted on the dial plate, and then firing is performed; the total thickness of the micro-painted enamel dial semi-finished product is 0.65mm, and the total thickness of the white base glaze layer and the enamel glaze layer is 0.25mm;
(7) Thoroughly degreasing, cleaning and drying a micro-painted enamel dial semi-finished product, painting and covering the front surface of the micro-painted enamel dial semi-finished product by using an oily pen, then placing the micro-painted enamel dial semi-finished product into a PVD vacuum plating furnace, and depositing a layer of metal titanium layer on the back surface and the side surface of the micro-painted enamel dial semi-finished product by adopting a vacuum ion plating method, wherein the deposition time is 50min;
(8) One end of a pin of the watch movement is vertically pressed in the positioning pit by a vertical clamping device, and then the pin is fixedly welded in the positioning pit by Ag-30Cu-10Sn low-temperature brazing filler metal, so that a micro-painted enamel dial finished product is obtained.
When the micro-painted enamel dial is required to be provided with time scales, before the pattern drawing in the step (5) is carried out, a mould provided with time scale grooves is assembled on the ceramic dial body, a center column of the mould is inserted into the gauge needle mounting hole, and the position of the mould is adjusted through the center lines of the gauge needle mounting hole and the positioning groove. The glaze is prepared by using 400-mesh black glaze powder, the glaze is dipped by a line pen by means of a microscope and is filled in a time scale groove of the mould, and after the filled glaze is dried, the mould is taken away, so that the front surface of the ceramic dial body is painted with time scales.
Example 3
Example 3 was modified on the basis of example 1, except that the process conditions for manufacturing the micro-painted enamel dial and the dimensional requirements for the micro-painted enamel dial in example 3 are different from those in example 1, and the following details are shown:
in this embodiment 3, the method for manufacturing the micro-painted enamel dial comprises the following steps:
(1) The nano zirconia is used as a raw material, a ceramic dial blank with the thickness of 0.9mm is manufactured by adopting an isostatic pressing process according to the designed dial shape, the cold isostatic pressing pressure is 230MPa, and the time is 60 seconds; the sintering temperature is 1400 ℃, and the sintering time is 3 hours; a watch needle mounting hole with the diameter of 1.8mm is arranged in the center of a ceramic dial plate blank, a positioning pit for mounting pins of a watch movement is pressed on the back surface of the watch needle mounting hole, and a positioning groove for positioning a watch crown is arranged on the side surface of the watch needle mounting hole; the depth of the positioning pit is 0.5mm, the diameter is 1.2mm, the width of the positioning groove is 0.2mm, and the depth is 0.1mm;
(2) Grinding the ceramic dial plate blank to a thickness of 0.3mm by adopting a high-precision numerical control surface grinding machine, wherein the front surface of the ceramic dial plate blank is ground to a thickness of 0.1mm, and the back surface of the ceramic dial plate blank is ground to a thickness of 0.5mm, so as to obtain a ceramic dial plate body, and the surface roughness of the ceramic dial plate body is 13 mu m;
(3) A pure silver pipe with the wall thickness of 0.4mm is embedded in a pointer mounting hole of a ceramic dial body, the lower end of the pure silver pipe is leveled with the back surface of the ceramic dial body, the upper end of the pure silver pipe is higher than the front surface of the ceramic dial body by 0.1mm, then the pure silver pipe is cleaned by detergent and washed by water, and the front surface of the ceramic dial body faces upwards after being dried and is placed on a titanium screen;
(4) The thermal expansion coefficient was 8X 10 by using 150 mesh sieve -6 Uniformly screening the middle-high temperature white glaze powder at the temperature of/DEG C on the front surface of the ceramic dial body, enabling the powder surface of the middle-high temperature white glaze powder to be leveled with the upper end of the pure silver tube, firing the powder at 900 ℃ for 50s, enabling the middle-high temperature white glaze powder layer to form a ground glaze layer, pushing the surface of the ground glaze layer to be leveled by using 800-mesh sand paper after cooling, firing the ground glaze layer at 900 ℃ for 25s to obtain the ground glaze layer with a flat surface, and dismantling the pure silver tube;
(5) The mould with time scale grooves is assembled on the ceramic dial plate body, the central column of the mould is inserted into the gauge needle mounting hole, and the position of the mould is adjusted through the central lines of the gauge needle mounting hole and the positioning groove. Preparing glaze with 320 meshes of black glaze powder, dipping the glaze with a line pen by means of a microscope, filling the glaze in a time scale groove of the mould, taking the mould away after the filled glaze is dried, and drawing a finished time scale on the front surface of the ceramic dial body;
(6) The thermal expansion coefficient is 6 multiplied by 10 -6 Grinding the medium-low temperature glaze at the temperature of/DEG C to 320 meshes, then respectively placing the low-temperature glaze in a palette according to the color, and respectively grinding the medium-low temperature glaze with various colors by using a palette knife and turpentine to be uniform until the viscosity value is 5 Pa.S; mixing the medium-low temperature glazes with different colors to prepare the dial plateThe medium-low temperature glaze corresponding to the pattern color is mixed according to the sequence from light color to dark color when being modulated; dipping the prepared medium-low temperature glaze with a painting brush, drawing patterns on the front surface of the ceramic dial body by means of a microscope, wherein the arrangement direction of the patterns is determined according to the positioning grooves on the side surface of the ceramic dial body;
(7) Thoroughly drying the glaze on the ceramic dial body, then firing the ceramic dial body at 700 ℃ for 60 seconds to enable the drawn medium-low temperature glaze to form an enamel glaze layer, and taking out and cooling the ceramic dial body to obtain a micro-painted enamel dial semi-finished product; taking out and cooling, observing the glaze, and if the enamel glaze layer needs to be filled with glaze, putting the enamel glaze layer into a furnace for re-firing; for the glaze which is easy to change color in the firing process, after other glaze which is difficult to change color is fired, the glaze is painted on the dial plate, and then firing is performed; the total thickness of the micro-painted enamel dial semi-finished product is 0.45mm, and the total thickness of the white base glaze layer and the enamel glaze layer is 0.15mm;
(8) Thoroughly degreasing, cleaning and drying a micro-painted enamel dial semi-finished product, painting and covering the front surface of the micro-painted enamel dial semi-finished product by using an oily pen, then placing the micro-painted enamel dial semi-finished product into a PVD vacuum plating furnace, and depositing a layer of metal titanium layer on the back surface and the side surface of the micro-painted enamel dial semi-finished product by adopting a vacuum ion plating method, wherein the deposition time is 40min;
(9) One end of a pin of the watch movement is vertically pressed in the positioning pit by a vertical clamping device, and then the pin is fixedly welded in the positioning pit by Ag-30Cu-10Sn low-temperature brazing filler metal, so that a micro-painted enamel dial finished product is obtained.
Example 4
This example provides a wristwatch containing the micro-painted enamel dial of example 1 or example 2 or example 3.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (5)
1. The manufacturing method of the micro-painted enamel dial is characterized by comprising the following steps of:
(1) The method comprises the steps of taking nano zirconia as a raw material, adopting an isostatic compaction process to manufacture a ceramic dial blank, arranging a pointer mounting hole in the center of the ceramic dial blank, pressing a positioning pit for mounting pins of a watch movement on the back of the ceramic dial blank, and arranging a positioning groove for positioning a watch crown on the side surface of the ceramic dial blank;
(2) Grinding the ceramic dial blank by adopting a high-precision numerical control surface grinding machine to obtain a ceramic dial body;
(3) An adaptive pure silver tube is embedded in a pointer mounting hole of a ceramic dial body, the lower end of the pure silver tube is leveled with the back surface of the ceramic dial body, the upper end of the pure silver tube is higher than the front surface of the ceramic dial body by 0.1-0.15 mm, and then the pure silver tube is cleaned and dried, and the front surface of the ceramic dial body faces upwards and is placed on a titanium net;
(4) Uniformly screening a layer of medium-high temperature white glaze powder on the front surface of the ceramic dial body, enabling the powder surface of the medium-high temperature white glaze powder to be leveled with the upper end of the pure silver tube, firing the powder surface of the medium-high temperature white glaze powder to form a ground glaze layer, pushing the surface of the ground glaze layer to be leveled after cooling, firing the powder surface of the ground glaze layer for the second time, and dismantling the pure silver tube;
(5) Modulating the medium-low temperature glaze according to the designed dial pattern color, and drawing a required pattern on the front surface of the ceramic dial body by using the modulated medium-low temperature glaze under a microscope;
(6) Drying the glaze on the ceramic dial body, firing the glaze to form an enamel glaze layer on the drawn medium-low temperature glaze, and taking out and cooling the enamel glaze layer to obtain a micro-painted enamel dial semi-finished product;
(7) Thoroughly degreasing, cleaning and drying the micro-painted enamel dial semi-finished product, and depositing a layer of metal titanium layer on the back and the side of the micro-painted enamel dial semi-finished product by adopting a vacuum ion plating method;
(8) Finally, vertically fixing pins of the watch movement in the positioning pits to obtain a micro-painted enamel dial finished product;
in the step (4), medium-high temperature whiteThe thermal expansion coefficient of the glaze powder is 8 multiplied by 10 -6 /℃～9×10 -6 The temperature of the two firing is 900 ℃, wherein the time of the first firing is 50-70 s, and the time of the second firing is 25-30 s;
in the step (5), the thermal expansion coefficient is 6 multiplied by 10 -6 /℃～8×10 -6 The medium-low temperature glaze material at the temperature of/DEG C is taken as a raw material, and is ground to 320-400 meshes, then is respectively placed in a color mixing disc according to the color, and the medium-low temperature glaze material with each color is respectively and uniformly rolled by a color mixing knife and turpentine until the viscosity value is 5-10 Pa.S; when the mid-sole temperature glazes with different colors are mixed and modulated, the mixing is carried out according to the sequence of light color and dark color; the arrangement of the pattern determines the direction according to the positioning groove;
in the step (6), the firing temperature is 700-800 ℃ and the firing time is 50-60 s, and when the enamel layer is taken out and cooled, if the enamel layer needs to be filled with glaze, the enamel layer needs to be fired again in a furnace.
2. The method for manufacturing the micro-painted enamel dial according to claim 1, which is characterized in that: the thickness of the ceramic dial plate blank is 0.9-1.0 mm, the diameter of the pointer mounting hole is 1.8-2.0 mm, the depth of the positioning pit is 0.5-0.6 mm, the diameter is 1.2-1.5 mm, the width of the positioning groove is 0.2-0.25 mm, and the depth is 0.1-0.15 mm.
3. The method for manufacturing the micro-painted enamel dial according to claim 1, which is characterized in that: in the step (2), a high-precision numerical control surface grinding machine is adopted to grind the blank of the ceramic dial plate to be 0.3-0.4 mm thick; wherein, the front surface of the ceramic dial blank is ground to be reduced by 0.1-0.2 mm in thickness, the back surface is ground to be reduced by 0.4-0.5 mm in thickness, and the surface roughness of the ground ceramic dial blank is 13-16 mu m.
4. The method for manufacturing the micro-painted enamel dial according to claim 1, which is characterized in that: when the micro-painted enamel dial is required to be provided with time scales, before the pattern drawing in the step (5) is carried out, a mould provided with a time scale groove is assembled on the ceramic dial body, a center column of the mould is inserted into a pointer mounting hole, the position of the mould is adjusted through the center line of the pointer mounting hole and a positioning groove, glaze is mixed with 320-400 meshes of glaze powder, the mixed glaze is filled in the time scale groove of the mould under a microscope, and after the filled glaze is dried, the mould is taken away, so that the front surface of the ceramic dial body is painted with the time scales.
5. The micro-painted enamel dial manufactured by the manufacturing method of the micro-painted enamel dial according to any one of claims 1 to 4, comprising a ceramic dial body, and is characterized in that: the ceramic dial body is provided with a pointer mounting hole in the center, the back of the ceramic dial body is provided with a positioning pit for mounting pins of a watch movement, the side of the ceramic dial body is provided with a positioning groove for positioning a watch crown, and the front of the ceramic dial body is provided with an enamel glaze layer;
the side surfaces and the back surface of the ceramic dial body are plated with metal titanium layers;
the thickness of the enamel glaze layer is 0.15-0.25 mm, and the enamel glaze layer comprises a ground glaze layer at the bottom layer and an enamel glaze layer drawn under a microscope at the upper layer.
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