WO2012023805A2 - Method for producing a zirconia ceramic case having a logo for a portable electronic device - Google Patents

Method for producing a zirconia ceramic case having a logo for a portable electronic device Download PDF

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Publication number
WO2012023805A2
WO2012023805A2 PCT/KR2011/006051 KR2011006051W WO2012023805A2 WO 2012023805 A2 WO2012023805 A2 WO 2012023805A2 KR 2011006051 W KR2011006051 W KR 2011006051W WO 2012023805 A2 WO2012023805 A2 WO 2012023805A2
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Prior art keywords
zirconia
case
logo
molded body
case molded
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PCT/KR2011/006051
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French (fr)
Korean (ko)
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WO2012023805A3 (en
Inventor
이재형
정인철
박성택
우명훈
Original Assignee
영남대학교 산학협력단
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Priority to KR1020137003169A priority Critical patent/KR101452736B1/en
Publication of WO2012023805A2 publication Critical patent/WO2012023805A2/en
Publication of WO2012023805A3 publication Critical patent/WO2012023805A3/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • 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
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • G04B37/225—Non-metallic cases
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6025—Tape casting, e.g. with a doctor blade
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/94—Products characterised by their shape
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9646—Optical properties
    • C04B2235/9661—Colour
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/345—Refractory metal oxides
    • C04B2237/348—Zirconia, hafnia, zirconates or hafnates
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/58—Forming a gradient in composition or in properties across the laminate or the joined articles
    • C04B2237/582—Forming a gradient in composition or in properties across the laminate or the joined articles by joining layers or articles of the same composition but having different additives
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/78—Side-way connecting, e.g. connecting two plates through their sides
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/86—Joining of two substrates at their largest surfaces, one surface being complete joined and covered, the other surface not, e.g. a small plate joined at it's largest surface on top of a larger plate

Definitions

  • the present invention relates to a method for manufacturing a zirconia case for a mobile electronic device, and more particularly, to a method for manufacturing a zirconia ceramic case having a logo having excellent aesthetics.
  • Zirconia ceramics generally contain a molar ratio of 2% to 3% of yttrium oxide (Y 2 O 3 ) as a partial stabilizer.
  • the tetragonal zirconia is obtained by the addition of a partial stabilizer, and since the tetragonal zirconia has high strength and toughness, it is widely used as a structural material and has a high hardness, so that no scratch occurs. In addition, zirconia can realize a variety of colors by the material itself, the surface polished beautiful luster.
  • transfer printing, screen printing, ink printing or enamel coating can be considered.
  • the aesthetics of the logo formed by this method are significantly decreased, and the sintering shrinkage rate of the zirconia case molded body and the sintering shrinkage rate of the coated logo are different during the sintering process during the zirconia case manufacturing process, so that the shape of the logo is distorted after the sintering process. It can be further degraded and cracks easily formed.
  • the present invention is to solve the problems of the prior art, and an object of the present invention is to provide a method for producing a zirconia ceramic case logo is formed having a good aesthetic.
  • the logo is molded from zirconia in the same manner as the case, and thus the composition is made the same as that of the zirconia case except for a trace amount of additive that gives color.
  • a zirconia ceramic case in which a logo having an excellent aesthetic is formed can be manufactured.
  • FIG. 1 is a cross-sectional view of a zirconia case having an embossed logo produced by the manufacturing method of the first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a zirconia case having an inlaid logo produced by the manufacturing method of the second embodiment of the present invention.
  • Figure 3 is a state of performing an isostatic press on the zirconia case molded body after engraving the intaglio portion in the press die in the third embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a zirconia case having an inlaid logo produced by the manufacturing method of the fourth embodiment of the present invention.
  • FIG. 5 is a sectional view of a case made of zirconia with only a portion 500 in accordance with a fifth embodiment of the present invention.
  • Figure 6 is a plan view of a zirconia case produced by the manufacturing method of the present invention.
  • the first embodiment of the present invention comprises the steps of molding a flexible zirconia case molded body containing an organic additive; Molding a flexible logo using zirconia raw materials having the same composition except for the zirconia case molded body and the trace additives; Forming an intaglio portion in a press mold, placing the logo on the intaglio portion of the press mold, and placing the zirconia case molded body thereon, and then performing an isostatic press; Sintering the zirconia case molded body; And surface polishing the zirconia case sintered body.
  • the logo is formed of zirconia having the same composition as that of the zirconia case molded body, the sintering shrinkage rate of the zirconia case molded body and the sintered shrinkage rate of the logo are the same during the sintering process of the zirconia case molded body, thereby causing the logo to be distorted. It can prevent.
  • the logo may be formed into a plurality of pieces having two or more different colors.
  • the flexible zirconia case and logo molded body can be manufactured by tape casting, extrusion, roller casting or ceramic injection.However, roller casting or tape casting is used to achieve a thin thickness of about 1 mm and to achieve uniform sinter shrinkage. Preferably, the same method of forming the case and the logo is easy to match the sintering shrinkage rate.
  • the isostatic press of the molded body and the logo is preferably performed at 50 ° C to 150 ° C, which is near the glass transition temperature of a general organic binder added for molding, and in the case of a flat case, hot uniaxial press can be performed instead of the isopress press. have.
  • FIG. 2 is a cross-sectional view of a zirconia case 200 having an inlaid logo 210 in relation to a second embodiment of the present invention.
  • a second embodiment of the present invention forming a zirconia case molded body, punching a logo shape on the zirconia case molded body; Molding a logo having the same shape as that of the logo from a zirconia raw material having the same composition except for the zirconia case molded body and a small amount of additives; Performing an isostatic press in a state in which the logo shape of the zirconia case molded body and the logo are aligned; Sintering the zirconia case molded body; Planar grinding or surface polishing of the zirconia case sintered body.
  • FIG. 3 is a view illustrating a manufacturing method of a third embodiment of the present invention, in which an engraved portion 310 is engraved on a press die 320, and then an isostatic press is carried out with the zirconia case molded body 300 mounted thereon.
  • the third embodiment of the present invention comprises the steps of engraving the engraved portion 310 in the press mold 320; Molding the zirconia case molded body 300; Putting an zirconia case molded body 300 on the press die 320 and performing an isostatic press; Sintering the zirconia case molded body 300; And surface polishing the zirconia case sintered body.
  • the zirconia case molded body 300 is subjected to isostatic pressing against the press die 320 having the intaglio portion 310 formed therein, so that the same material and the same material as those of the zirconia case molded body 300 are formed without a separate logo.
  • the logo of the composition can be formed.
  • the dried and flexible zirconia case moldings of white and no colored components containing Er 2 O 3 were cut into squares of approximately 13 cm x 6 cm, respectively, and then four leaf clover-shaped on them using the same craft puncher. Made of pieces. Pink four-leaf clover shaped pieces were fitted in the openings formed in the white zirconia case moldings containing no color-forming components, and white four-leaf clover shaped pieces were fitted in the pink zirconia case moldings.
  • the zirconia case moldings were uniaxially pressurized for 5 minutes at a pressure of 30 MPa at 85 ° C, and then isostatically formed at 85 ° C on a flat aluminum plate at 230 MPa, so that the contact interface between the four-leaf clover-shaped pieces and the surrounding zirconia case moldings was defective. It comes in close contact without.
  • FIG. 6 with the white logo on the pink background (hatched) and the zirconia case (left side of FIG. 6) with the pink logo (hatched) on the white background is shown in FIG. .
  • the interface between the logo and the zirconia case was clear and there were no defects such as pores, and the entire zirconia case had no warpage and its surface was aesthetically beautiful with light and color peculiar to zirconia.
  • the resulting zirconia case with a black logo on a blue background and the zirconia case with a blue logo on a black background had a clear interface and no porosity defects, as in Example I, and the entire zirconia case had no warpage and the surface was also zirconia. It was beautifully aesthetic because of its unique luster and color.
  • the thickness of the logo is thicker than the depth of the intaglio portion of the press mold, isostatic pressure
  • the surface grinding is performed such that the logo surface and the sintered body surface of the zirconia case are coplanar, thereby producing a zirconia case 400 having an inlaid logo 410 as shown in FIG. Can be.
  • the engraved part is engraved on the press mold, and then the logo and the zirconia case molded body are sequentially placed thereon, followed by isostatic pressing and sintering to produce a zirconia ceramic case having the protruding logo.
  • the zirconia ceramic case having the protruding logo can be manufactured even if the case molded body is placed first without placing the engraved part and then the logo is placed on the case.
  • the intaglio portion 310 is formed in the press die 320, but instead of the embossed portion may be formed.
  • a zirconia ceramic case in which a logo having an excellent aesthetic is formed can be manufactured.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
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  • Materials Engineering (AREA)
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  • General Physics & Mathematics (AREA)
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  • Compositions Of Oxide Ceramics (AREA)
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Abstract

The present invention relates to a method of producing a zirconia ceramic case for a portable electronic device, wherein the case has a logo that is dramatically aesthetically enhanced. The logo is made of zirconia similarly to the zirconia case, and a composition of the logo is the same as that of the zirconia case with the exception of coloring additives. According to the present invention, a zirconia case sintering process, in which the zirconia case shrinks, is performed, and the same process is carried out for the logo, thereby preventing the shape of the logo from becoming warped, and achieving a dramatic aesthetic enhancement for the logo.

Description

로고를 갖는 휴대전자기기용 지르코니아 세라믹 케이스 제조방법Manufacturing method of zirconia ceramic case for mobile electronic device with logo
본 발명은 휴대전자기기용 지르코니아 케이스 제조방법에 관한 것이고, 구체적으로는 우수한 미감을 갖는 로고가 형성된 지르코니아 세라믹 케이스 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a zirconia case for a mobile electronic device, and more particularly, to a method for manufacturing a zirconia ceramic case having a logo having excellent aesthetics.
휴대폰, PDA, MP3플레이어, 노트북 컴퓨터 등과 같은 휴대용 전자기기의 케이스는 대부분 폴리카보네이트, ABS와 같은 플라스틱이나 또는 스테인레스 스틸, 알루미늄 합금 등의 금속으로 만들어진다. 이러한 재료들은 비교적 저렴하고 간단한 제조방법으로 케이스를 제조할 수 있는 이점이 있으나 경도가 높지 않아서 사용 중 표면에 스크래치가 생긴다. 이러한 단점을 보완할 수 있는 재료로서 세라믹스의 일종인 지르코니아가 있다. 지르코니아 세라믹스는 일반적으로 부분안정화제로서 산화이트리움(Y2O3)이 몰비 2% 내지 3%가 첨가되어 있다. 부분안정화제를 첨가함으로써 정방정상의 지르코니아가 얻어지며, 이러한 정방정상의 지르코니아는 높은 강도와 인성을 지녀서 구조재료로서 널리 사용되며 또한 높은 경도를 갖기 때문에 스크래치가 생기지 않는다. 이와 더불어, 지르코니아는 그 재료 자체로 다양한 색상을 구현할 수 있으며, 표면 연마를 행하면 광택이 미려하게 된다.Most cases of portable electronic devices such as mobile phones, PDAs, MP3 players, and notebook computers are made of plastic such as polycarbonate and ABS or metal such as stainless steel or aluminum alloy. These materials have the advantage that the case can be manufactured by a relatively inexpensive and simple manufacturing method, but the hardness is not so high that scratches on the surface during use. A material that can compensate for this disadvantage is zirconia, a kind of ceramics. Zirconia ceramics generally contain a molar ratio of 2% to 3% of yttrium oxide (Y 2 O 3 ) as a partial stabilizer. The tetragonal zirconia is obtained by the addition of a partial stabilizer, and since the tetragonal zirconia has high strength and toughness, it is widely used as a structural material and has a high hardness, so that no scratch occurs. In addition, zirconia can realize a variety of colors by the material itself, the surface polished beautiful luster.
휴대용 전자기기의 지르코니아 세라믹 케이스에 로고를 형성하는 방법으로는 전사(transfer printing), 스크린 프린팅, 잉크 프린팅 또는 에나멜 코팅을 생각할 수 있다. 그러나, 이러한 방법을 통해 형성된 로고는 그 미감이 현저히 떨어지고, 지르코니아 케이스 제조 공정 중 소결 공정 시 지르코니아 케이스 성형체의 소결 수축율과 코팅된 로고의 소결 수축율이 상이하여 소결 공정 이후 로고의 형상이 뒤틀려버려 미감이 더욱 저하될 수 있으며 또한 균열이 쉽게 생길 수 있다.As a method of forming a logo on a zirconia ceramic case of a portable electronic device, transfer printing, screen printing, ink printing or enamel coating can be considered. However, the aesthetics of the logo formed by this method are significantly decreased, and the sintering shrinkage rate of the zirconia case molded body and the sintering shrinkage rate of the coated logo are different during the sintering process during the zirconia case manufacturing process, so that the shape of the logo is distorted after the sintering process. It can be further degraded and cracks easily formed.
본 발명은 이러한 종래 기술의 문제점을 해결하기 위한 것으로, 우수한 미감을 갖는 로고가 형성된 지르코니아 세라믹 케이스 제조방법을 제공하는 것을 목적으로 한다.The present invention is to solve the problems of the prior art, and an object of the present invention is to provide a method for producing a zirconia ceramic case logo is formed having a good aesthetic.
이러한 목적을 달성하기 위하여, 본 발명에서는 로고를 케이스와 동일하게 지르코니아로 성형하고, 따라서 색상을 내는 미량의 첨가제를 제외한 조성을 지르코니아 케이스와 동일하게 한 것이다.In order to achieve this object, in the present invention, the logo is molded from zirconia in the same manner as the case, and thus the composition is made the same as that of the zirconia case except for a trace amount of additive that gives color.
본 발명에 따르면, 우수한 미감을 갖는 로고가 형성된 지르코니아 세라믹 케이스를 제조할 수 있다.According to the present invention, a zirconia ceramic case in which a logo having an excellent aesthetic is formed can be manufactured.
도1는 본 발명의 제1 실시예의 제조방법에 의해 제조된 돌출된 로고(embossed logo)를 갖는 지르코니아 케이스의 단면도.1 is a cross-sectional view of a zirconia case having an embossed logo produced by the manufacturing method of the first embodiment of the present invention.
도2은 본 발명의 제2 실시예의 제조방법에 의해 제조된 상감 로고(inlaid logo)를 갖는 지르코니아 케이스의 단면도.2 is a cross-sectional view of a zirconia case having an inlaid logo produced by the manufacturing method of the second embodiment of the present invention.
도3는 본 발명의 제3 실시예에서 프레스 금형에 음각부를 새긴 후 지르코니아 케이스 성형체를 올려놓고 등압 프레스를 행하는 모습.Figure 3 is a state of performing an isostatic press on the zirconia case molded body after engraving the intaglio portion in the press die in the third embodiment of the present invention.
도4은 본 발명의 제4 실시예의 제조방법에 의해 제조된 상감 로고(inlaid logo)를 갖는 지르코니아 케이스의 단면도.4 is a cross-sectional view of a zirconia case having an inlaid logo produced by the manufacturing method of the fourth embodiment of the present invention.
도5는 본 발명의 제5 실시예에 관한 것으로, 일부만(500) 지르코니아로 제조된 케이스의 단면도.5 is a sectional view of a case made of zirconia with only a portion 500 in accordance with a fifth embodiment of the present invention.
도6는 본 발명의 제조방법에 의해 제조된 지르코니아 케이스의 평면도.Figure 6 is a plan view of a zirconia case produced by the manufacturing method of the present invention.
이하에서는 본 발명의 바람직한 실시예를 들어 상세하게 설명한다.Hereinafter, a preferred embodiment of the present invention will be described in detail.
도1은 본 발명의 제1 실시예에 관한 것으로, 돌출된 로고(embossed logo)(110)를 갖는 지르코니아 케이스(100)의 단면도이다. 본 발명의 제1 실시예는 유기첨가제를 함유하여 유연한 지르코니아 케이스 성형체를 성형하는 단계; 상기 지르코니아 케이스 성형체와 미량의 첨가제를 제외하고는 동일한 조성을 가지는 지르코니아 원료를 사용하여 유연한 로고를 성형하는 단계; 프레스 금형에 음각부를 형성하고, 상기 로고를 상기 프레스 금형의 음각부에 올려놓고 그 위에 상기 지르코니아 케이스 성형체를 올려놓은 다음 등압 프레스를 행하는 단계; 상기 지르코니아 케이스 성형체를 소결하는 단계; 지르코니아 케이스 소결체를 표면 연마하는 단계를 포함한다. 상기 제1 실시예에서는 로고를 지르코니아 케이스 성형체와 조성이 동일한 지르코니아로 성형하므로, 지르코니아 케이스 성형체의 소결 공정 시, 지르코니아 케이스 성형체의 소결 수축율과 로고의 소결 수축율을 동일하게 하여 로고의 형상이 뒤틀리는 현상을 방지할 수 있다. 1 is a cross-sectional view of a zirconia case 100 having an embossed logo 110 in relation to a first embodiment of the present invention. The first embodiment of the present invention comprises the steps of molding a flexible zirconia case molded body containing an organic additive; Molding a flexible logo using zirconia raw materials having the same composition except for the zirconia case molded body and the trace additives; Forming an intaglio portion in a press mold, placing the logo on the intaglio portion of the press mold, and placing the zirconia case molded body thereon, and then performing an isostatic press; Sintering the zirconia case molded body; And surface polishing the zirconia case sintered body. In the first embodiment, since the logo is formed of zirconia having the same composition as that of the zirconia case molded body, the sintering shrinkage rate of the zirconia case molded body and the sintered shrinkage rate of the logo are the same during the sintering process of the zirconia case molded body, thereby causing the logo to be distorted. It can prevent.
한편, 로고를 두 개 이상의 색상으로 구현하기 위하여, 로고를 두 개 이상의 서로 다른 색상을 가지는 복수의 조각들로 성형할 수 있다. Meanwhile, in order to implement the logo in two or more colors, the logo may be formed into a plurality of pieces having two or more different colors.
유연한 지르코니아 케이스 및 로고 성형체는 테이프 캐스팅 법, 압출법, 롤러 캐스팅법 또는 세라믹 사출법으로 제조될 수 있으나, 1 mm 내외의 얇은 두께를 구현하고 균일한 소결 수축율을 위해서는 롤러 캐스팅법이나 테이프 캐스팅법이 바람직하며, 또한 케이스와 로고의 성형 방법이 서로 동일한 것이 소결 수축율을 맞추기에 용이하다. 성형체와 로고의 등압프레스는 성형을 위해 첨가되는 일반적인 유기바인더의 유리전이온도 부근인 50°C 내지 150°C에서 행해지는 것이 바람직하며, 평판형 케이스의 경우는 등압프레스 대신 열간 일축프레스를 행할 수 있다.The flexible zirconia case and logo molded body can be manufactured by tape casting, extrusion, roller casting or ceramic injection.However, roller casting or tape casting is used to achieve a thin thickness of about 1 mm and to achieve uniform sinter shrinkage. Preferably, the same method of forming the case and the logo is easy to match the sintering shrinkage rate. The isostatic press of the molded body and the logo is preferably performed at 50 ° C to 150 ° C, which is near the glass transition temperature of a general organic binder added for molding, and in the case of a flat case, hot uniaxial press can be performed instead of the isopress press. have.
도2는 본 발명의 제2 실시예에 관한 것으로, 상감 로고(inlaid logo)(210)를 갖는 지르코니아 케이스(200)의 단면도이다. 본 발명의 제2 실시예는, 지르코니아 케이스 성형체를 성형하고, 상기 지르코니아 케이스 성형체에 로고 형상을 펀칭하는 단계; 상기 지르코니아 케이스 성형체와 미량의 첨가제를 제외하고는 동일한 조성을 가지는 지르코니아 원료로 상기 로고 형상과 동일한 형상을 갖는 로고를 성형하는 단계; 상기 지르코니아 케이스 성형체의 로고 형상과 상기 로고를 정렬한 상태에서 등압 프레스를 행하는 단계; 상기 지르코니아 케이스 성형체를 소결하는 단계; 지르코니아 케이스 소결체를 평면 연삭 또는 표면 연마하는 단계를 포함한다. 2 is a cross-sectional view of a zirconia case 200 having an inlaid logo 210 in relation to a second embodiment of the present invention. A second embodiment of the present invention, forming a zirconia case molded body, punching a logo shape on the zirconia case molded body; Molding a logo having the same shape as that of the logo from a zirconia raw material having the same composition except for the zirconia case molded body and a small amount of additives; Performing an isostatic press in a state in which the logo shape of the zirconia case molded body and the logo are aligned; Sintering the zirconia case molded body; Planar grinding or surface polishing of the zirconia case sintered body.
도3는 본 발명의 제3 실시예의 제조방법에 관한 것으로, 프레스 금형(320)에 음각부(310)를 새긴 후 지르코니아 케이스 성형체(300)를 올려놓고 등압프레스를 행하는 모습을 도시한다. 본 발명의 제3 실시예는 프레스 금형(320)에 음각부(310)를 새기는 단계; 지르코니아 케이스 성형체(300)를 성형하는 단계; 상기 프레스 금형(320)에 지르코니아 케이스 성형체(300)를 올려 놓고 등압프레스를 행하는 단계; 상기 지르코니아 케이스 성형체(300)를 소결하는 단계; 지르코니아 케이스 소결체를 표면 연마하는 단계를 포함한다. 상기 제3 실시예에서는 지르코니아 케이스 성형체(300)를 음각부(310)가 형성된 프레스 금형(320)에 대고 등압 프레스를 행하므로 별도의 로고를 성형하지 않고도 지르코니아 케이스 성형체(300)와 동일한 재료 및 동일한 조성의 로고를 형성할 수 있다.3 is a view illustrating a manufacturing method of a third embodiment of the present invention, in which an engraved portion 310 is engraved on a press die 320, and then an isostatic press is carried out with the zirconia case molded body 300 mounted thereon. The third embodiment of the present invention comprises the steps of engraving the engraved portion 310 in the press mold 320; Molding the zirconia case molded body 300; Putting an zirconia case molded body 300 on the press die 320 and performing an isostatic press; Sintering the zirconia case molded body 300; And surface polishing the zirconia case sintered body. In the third embodiment, the zirconia case molded body 300 is subjected to isostatic pressing against the press die 320 having the intaglio portion 310 formed therein, so that the same material and the same material as those of the zirconia case molded body 300 are formed without a separate logo. The logo of the composition can be formed.
본 발명의 구체적인 실시예를 아래와 같이 설명한다.Specific embodiments of the present invention will be described below.
(실시예 Ⅰ)(Example I)
분산제 4g을 첨가하여 무게비 6:4의 톨루엔과 에타놀 혼합용매 40g 속에서 24시간 볼밀된 몰비 3% Y2O3를 함유하는 ZrO2 분말 200g 슬러리를, PVB 결합제 17.9g, 가소제 15.2g, 무게비 6:4의 톨루엔과 에타놀 혼합용매 40.2g의 혼합체와 24시간 혼합하고 진공에서 탈포를 한 후에, 테이프 캐스팅법으로 약 1 mm 두께의 유연한 지르코니아 케이스 성형체를 성형하여 24 시간 동안 건조하였다. 또한 분산제 4g을 첨가하여 무게비 6:4의 톨루엔과 에타놀 혼합용매 40g 속에서 24시간 볼밀된 몰비 3% Y2O3를 함유하는 ZrO2 분말 193g과 핑크색을 내는 안료인 Er2O3 7g의 슬러리를, PVB 결합제 17.6g, 가소제 15.0g, 무게비 6:4의 톨루엔과 에타놀 혼합용매 39.5g의 혼합체와 24시간 혼합하고 진공에서 탈포를 한 후에, 테이프 캐스팅법으로 약 1 mm 두께의 지르코니아 케이스 성형체를 성형하여 24 시간 동안 건조하였다. 색깔을 내는 성분이 포함되지 않은 흰색과 Er2O3가 포함된 핑크색의 건조된 유연한 지르코니아 케이스 성형체들을 각각 약 13 cm x 6 cm의 사각으로 잘라낸 후, 동일한 공예 펀처를 이용하여 이들에 네잎 클로버 형상의 조각들을 만들었다. 색깔을 내는 성분이 함유되지 않은 흰색 지르코니아 케이스 성형체에 형성된 개구에는 핑크색 네잎 클로버 형상의 조각을 맞추어 끼우고, 핑크색 지르코니아 케이스 성형체에는 흰색 네잎 클로버 형상의 조각을 끼웠다. 상기 지르코니아 케이스 성형체들은 각각 85℃에서 30 MPa의 압력으로 5분간 일축 가압하고 다시 230 MPa로 평평한 알루미늄판 위에서 85℃에서 등압성형을 하여 네잎 클로버 형상의 조각과 주위 지르코니아 케이스 성형체와의 접촉계면이 결함 없이 밀착이 되게 하였다. 4 g of a dispersant was added to a slurry of 200 g of ZrO 2 powder containing a molar ratio of 3% Y 2 O 3 which was ball milled for 24 hours in 40 g of a mixed solvent of toluene and ethanol with a weight ratio of 6: 4, 17.9 g of PVB binder, 15.2 g of plasticizer, and 6 After mixing for 24 hours with a mixture of 40.2 g of a toluene and ethanol mixed solvent of: 4 and degassing in vacuo, a flexible zirconia case molded body having a thickness of about 1 mm was molded and dried for 24 hours. Slurry of 193 g of ZrO 2 powder containing 3% Y 2 O 3 molar ratio ball milled for 24 hours in 40 g of toluene and ethanol mixed solvent with a weight ratio of 6: 4 by adding 4 g of a dispersant and a pigment of Er 2 O 3 , a pink pigment After mixing with a mixture of 17.6 g of PVB binder, 15.0 g of plasticizer, and 39.5 g of toluene and ethanol mixed solvent having a weight ratio of 6: 4, and degassing under vacuum, a zirconia case molded body having a thickness of about 1 mm was formed by tape casting. Molded and dried for 24 hours. The dried and flexible zirconia case moldings of white and no colored components containing Er 2 O 3 were cut into squares of approximately 13 cm x 6 cm, respectively, and then four leaf clover-shaped on them using the same craft puncher. Made of pieces. Pink four-leaf clover shaped pieces were fitted in the openings formed in the white zirconia case moldings containing no color-forming components, and white four-leaf clover shaped pieces were fitted in the pink zirconia case moldings. The zirconia case moldings were uniaxially pressurized for 5 minutes at a pressure of 30 MPa at 85 ° C, and then isostatically formed at 85 ° C on a flat aluminum plate at 230 MPa, so that the contact interface between the four-leaf clover-shaped pieces and the surrounding zirconia case moldings was defective. It comes in close contact without.
소결은 130℃에서 330℃ 사이에서 분당 0.2℃의 승온으로 탈지하고 1100℃에서 30분간 가소결한 후 1400℃에서 2시간 행하였다. 소결시 휘는 것을 방지하기 위해, 가소결 후, 지르코니아 케이스 성형체 전체보다 약간 큰 크기의 100g 정도 무게의 평평한 알루미나 판을 위에 얹어 놓아 최종 소결을 하였다. 로고를 지닌 지르코니아 소결체들은 두께가 0.8 mm였으며, 표면 연삭과 래핑을 거친 후의 두께는 0.5 mm였고 가로와 세로는 약 101 mm와 47 mm였다. 이렇게 얻은 핑크색 바탕(빗금친 부분)에 흰색 로고를 지닌 지르코니아 케이스(도6의 우측)와 흰색 바탕에 핑크색 로고(빗금친 부분)를 지닌 지르코니아 케이스(도6의 좌측)는 도6에 도시되어 있다. 도6에 도시된 바와 같이 로고와 지르코니아 케이스 사이의 경계면이 선명하고 기공과 같은 결함이 없었으며, 지르코니아 케이스 전체에 휨이 없고 그 표면도 지르코니아 특유의 광과 색상을 지녀서 미적으로 수려했다.Sintering was degreased at an elevated temperature of 0.2 deg. C per minute between 130 deg. C and 330 deg. C, followed by pre-sintering at 1100 deg. C for 30 minutes, followed by 2 hours at 1400 deg. In order to prevent bending during sintering, after sintering, the final sintering was carried out by placing a flat alumina plate weighing about 100 g, which was slightly larger than the entire zirconia case molded body. The zirconia sinters with logo were 0.8 mm thick, 0.5 mm thick after surface grinding and lapping, and about 101 mm and 47 mm in width and length. The resulting zirconia case (right side of FIG. 6) with the white logo on the pink background (hatched) and the zirconia case (left side of FIG. 6) with the pink logo (hatched) on the white background is shown in FIG. . As shown in FIG. 6, the interface between the logo and the zirconia case was clear and there were no defects such as pores, and the entire zirconia case had no warpage and its surface was aesthetically beautiful with light and color peculiar to zirconia.
(실시예 Ⅱ)(Example II)
청색 지르코니아 케이스 성형체를 성형하기 위해서, 몰비 3% Y2O3를 함유하는 ZrO2 분말 193g과 청색 안료 7g, 분산제 4g, PVB 결합제 18.1g, 가소제 15.3g, 무게비 6:4의 톨루엔과 에타놀 혼합용매 79.4g을 혼합하여 테이프캐스팅 슬러리를 만들었으며, 흑색 지르코니아 케이스 성형체를 성형하기 위해서는, 몰비 3% Y2O3를 함유하는 ZrO2 분말 192g과 흑색 안료 8g, 분산제 4g, PVB 결합제 18.1g, 가소제 15.3g, 무게비 6:4의 톨루엔과 에타놀 혼합용매 80.8g을 사용하여 테이프캐스팅 슬러리를 만든 것을 제외하고는 실시예 1에서와 동일한 방법으로 로고를 지닌 0.5 mm 두께의 약 101 x 47 mm 지르코니아 케이스를 제조하였다. 이렇게 얻은 청색 바탕에 흑색 로고를 지닌 지르코니아 케이스와 흑색 바탕에 청색 로고를 지닌 지르코니아 케이스는 실시예 I과 마찬가지로 경계면이 선명하고 기공과 같은 결함이 없었으며, 지르코니아 케이스 전체에 휨이 없고 그 표면도 지르코니아 특유의 광과 색상을 지녀서 미적으로 수려했다.To form a blue zirconia case molded body, 193 g of ZrO 2 powder containing a molar ratio of 3% Y 2 O 3 and 7 g of blue pigment, 4 g of a dispersant, 18.1 g of a PVB binder, 15.3 g of a plasticizer, and a mixed solvent of toluene and ethanol with a weight ratio of 6: 4 79.4 g of the mixture was made into a tape casting slurry, and in order to form a black zirconia case molding, 192 g of ZrO 2 powder and 8 g of black pigment containing a molar ratio of 3% Y 2 O 3 , a dispersant 4 g, a PVB binder 18.1 g, and a plasticizer 15.3 g, a 0.5 mm thick, approximately 101 x 47 mm zirconia case with a logo was prepared in the same manner as in Example 1, except that 80.8 g of toluene and ethanol mixed solvents having a weight ratio of 6: 4 were used. It was. The resulting zirconia case with a black logo on a blue background and the zirconia case with a blue logo on a black background had a clear interface and no porosity defects, as in Example I, and the entire zirconia case had no warpage and the surface was also zirconia. It was beautifully aesthetic because of its unique luster and color.
본 발명은 상기한 실시 형태에 한정되지 아니하며, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형이 가능할 것이다.The present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims.
예를 들어, 본 발명의 제1 실시예에서는 돌출된 로고(110)를 갖는 지르코니아 케이스 제조방법이 설명되어 있으나, 상기 제1 실시예에서 로고의 두께를 프레스 금형의 음각부 깊이보다 두껍게 하고, 등압프레스 공정 및 소결 공정을 행한 후 로고 표면과 지르코니아 케이스 소결체 표면이 동일 평면이 되도록 평면 연삭을 행하면 도4에 도시된 바와 같이 상감 로고(inlaid logo)(410)를 갖는 지르코니아 케이스(400)를 제조할 수 있다. 또한, 상기 제1 실시예에서는 프레스 금형에 음각부를 새긴 후 그 위에 로고 및 지르코니아 케이스 성형체를 순차적으로 올려놓은 후 등압 프레스 및 소결 공정을 행하여 돌출된 로고를 갖는 지르코니아 세라믹 케이스를 제조하나, 프레스 금형에 음각부를 새기지 않은 상태에서 케이스 성형체를 먼저 올려 놓고 그 위에 로고를 위치하여 등압 프레스를 행하더라도 돌출된 로고를 갖는 지르코니아 세라믹 케이스를 제조할 수 있다. For example, in the first embodiment of the present invention has been described a method of manufacturing a zirconia case having a protruding logo 110, in the first embodiment the thickness of the logo is thicker than the depth of the intaglio portion of the press mold, isostatic pressure After performing the pressing process and the sintering process, the surface grinding is performed such that the logo surface and the sintered body surface of the zirconia case are coplanar, thereby producing a zirconia case 400 having an inlaid logo 410 as shown in FIG. Can be. In addition, in the first embodiment, the engraved part is engraved on the press mold, and then the logo and the zirconia case molded body are sequentially placed thereon, followed by isostatic pressing and sintering to produce a zirconia ceramic case having the protruding logo. The zirconia ceramic case having the protruding logo can be manufactured even if the case molded body is placed first without placing the engraved part and then the logo is placed on the case.
또한, 제3 실시예에서는 프레스 금형(320)에 음각부(310)가 형성되나, 대신에 양각부가 형성될 수 있다.In addition, in the third embodiment, the intaglio portion 310 is formed in the press die 320, but instead of the embossed portion may be formed.
또한, 본 명세서에서는 케이스 전체를 지르코니아로 제조하는 실시예들만 설명하고 있으나, 도5에 도시된 바와 같이, 케이스를 2 이상으로 분할하여 그 일부만(500)을 지르코니아로 만들 수 있다. 이 경우, 지르코니아 부분을 제외한 나머지 부분(520)은 예를 들어, 플라스틱으로 제조될 수 있다. In addition, in this specification, only the embodiments of manufacturing the entire case of zirconia are described, but as shown in FIG. 5, only a part 500 of the case may be divided into two or more to make zirconia. In this case, the remaining portion 520 except for the zirconia portion may be made of plastic, for example.
본 발명에 따르면, 우수한 미감을 갖는 로고가 형성된 지르코니아 세라믹 케이스를 제조할 수 있다.According to the present invention, a zirconia ceramic case in which a logo having an excellent aesthetic is formed can be manufactured.

Claims (9)

  1. 지르코니아 케이스 성형체를 성형하는 단계;Molding a zirconia case molded body;
    상기 지르코니아 케이스 성형체와 색상 첨가제를 제외하고는 동일한 조성을 가지는 지르코니아 원료로 로고를 성형하는 단계;Molding a logo from zirconia raw materials having the same composition except for the zirconia case molded body and the color additive;
    프레스 금형에 음각부를 형성하고, 상기 로고를 상기 프레스 금형의 음각부에 올려놓고 그 위에 상기 지르코니아 케이스 성형체를 올려놓은 다음 프레스를 행하는 단계;Forming an intaglio portion in a press mold, placing the logo on the intaglio portion of the press mold, and placing the zirconia case molded body thereon and performing a press;
    상기 지르코니아 케이스 성형체를 소결하는 단계;Sintering the zirconia case molded body;
    지르코니아 케이스 소결체를 표면 연마하는 단계를 포함하는,Surface polishing the zirconia case sintered body,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  2. 제1항에 있어서, 로고의 두께를 프레스 금형의 음각부 깊이보다 두껍게 성형하고, 상기 표면 연마 단계는 로고의 표면과 지르코니아 케이스 성형체의 표면이 동일 표면이 되도록 하는,The method of claim 1, wherein the thickness of the logo is formed to be thicker than the depth of the intaglio portion of the press die, and the surface polishing step is such that the surface of the logo and the surface of the zirconia case molded body are the same surface.
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  3. 지르코니아 케이스 성형체를 성형하고, 상기 지르코니아 케이스 성형체에 로고 형상을 펀칭하는 단계;Molding a zirconia case molded body and punching a logo shape on the zirconia case molded body;
    상기 지르코니아 케이스 성형체와 색상 첨가제를 제외하고는 동일한 조성을 가지는 지르코니아 원료로, 상기 로고 형상과 동일한 형상을 갖는 로고를 성형하는 단계;Molding a logo having the same shape as the logo shape using a zirconia raw material having the same composition except for the zirconia case molded body and the color additive;
    상기 지르코니아 케이스 성형체의 로고 형상과 상기 로고를 정렬한 상태에서 프레스를 행하는 단계;Pressing in a state in which the logo shape of the zirconia case molded body and the logo are aligned;
    상기 지르코니아 케이스 성형체를 소결하는 단계;Sintering the zirconia case molded body;
    지르코니아 케이스 소결체를 평면 연삭 또는 표면 연마하는 단계를 포함하는,Planar grinding or surface polishing of the zirconia case sintered body,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  4. 제1 지르코니아 케이스 성형체를 성형하는 단계;Molding the first zirconia case molded body;
    상기 제1 지르코니아 케이스 성형체와 색상 첨가제를 제외하고는 동일한 조성 및 동일한 크기를 갖고 상기 제1 지르코니아 케이스 성형체와 다른 색을 갖는 제2 지르코니아 케이스 성형체를 성형하는 단계;Molding a second zirconia case molded body having the same composition and the same size except for the first zirconia case molded body and the color additive and having a different color from the first zirconia case molded body;
    상기 제1 지르코니아 케이스 성형체를 펀칭하여 제1 로고를 형성하고, 상기 제2 지르코니아 케이스 성형체를 펀칭하여 상기 제1 로고와 동일한 형상을 갖는 제2 로고를 형성하는 단계;Punching the first zirconia case molded body to form a first logo, and punching the second zirconia case molded body to form a second logo having the same shape as the first logo;
    상기 제1 지르코니아 케이스 성형체에 형성된 개구에는 상기 제2 로고를 맞추어 끼우고, 상기 제2 지르코니아 케이스 성형체에 형성된 개구에는 상기 제1 로고를 맞추어 끼우는 단계;Fitting the second logo into an opening formed in the first zirconia case molded body, and fitting the first logo into an opening formed in the second zirconia case molded body;
    상기 제1 및 제2 지르코니아 케이스 성형체를 프레스를 행하는 단계;Pressing the first and second zirconia case molded bodies;
    상기 제1 및 제2 지르코니아 케이스 성형체를 소결하는 단계;Sintering the first and second zirconia case moldings;
    제1 및 제2 지르코니아 케이스 소결체를 평면 연삭 또는 표면 연마하는 단계를 포함하는,Planar grinding or surface polishing the first and second zirconia case sintered bodies,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  5. 프레스 금형에 음각부 또는 양각부를 새기는 단계;Engraving the intaglio or embossed portion in the press mold;
    지르코니아 케이스 성형체를 성형하는 단계;Molding a zirconia case molded body;
    상기 프레스 금형에 지르코니아 케이스 성형체를 올려 놓고 프레스를 행하는 단계;Placing a zirconia case molded body on the press mold and performing a press;
    상기 지르코니아 케이스 성형체를 소결하는 단계;Sintering the zirconia case molded body;
    지르코니아 케이스 소결체를 표면 연마하는 단계를 포함하는,Surface polishing the zirconia case sintered body,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  6. 지르코니아 케이스 성형체를 성형하는 단계;Molding a zirconia case molded body;
    상기 지르코니아 케이스 성형체와 색상 첨가제를 제외하고는 동일한 조성을 가지는 지르코니아 원료로 로고를 성형하는 단계;Molding a logo from zirconia raw materials having the same composition except for the zirconia case molded body and the color additive;
    프레스 금형에 지르코니아 케이스 성형체를 올려놓고 그 위에 상기 로고를 배치한 다음 프레스를 행하는 단계;Placing a zirconia case molded body in a press mold, placing the logo thereon, and then performing a press;
    상기 지르코니아 케이스 성형체를 소결하는 단계;Sintering the zirconia case molded body;
    지르코니아 케이스 소결체를 표면 연마하는 단계를 포함하는,Surface polishing the zirconia case sintered body,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  7. 제1항 내지 제6항 중 어느 한 항에 있어서, 상기 프레스 단계는 등압 프레스 단계인, The press step according to claim 1, wherein the press step is an isostatic press step.
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  8. 제1항 내지 제6항 중 어느 한 항에 있어서, 상기 프레스 단계는 열간 일축 프레스 단계인, The press step according to claim 1, wherein the pressing step is a hot uniaxial press step.
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
  9. 제1항, 제2항, 제3항, 제4항 또는 제6항 중 어느 한 항에 있어서, 상기 로고는 서로 다른 색상을 가지는 복수의 조각으로 이루어지는,The method according to any one of claims 1, 2, 3, 4 or 6, wherein the logo consists of a plurality of pieces having different colors,
    휴대용전자기기용 지르코니아 세라믹 케이스 제조방법.Method for manufacturing zirconia ceramic case for portable electronic devices.
PCT/KR2011/006051 2010-08-17 2011-08-17 Method for producing a zirconia ceramic case having a logo for a portable electronic device WO2012023805A2 (en)

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EP3560703A1 (en) * 2018-04-24 2019-10-30 Beijing Xiaomi Mobile Software Co., Ltd. Ceramic shell, mobile terminal and method for manufacturing ceramic shell
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US9919971B2 (en) 2013-12-27 2018-03-20 Tosoh Corporation Zirconia sintered body and use thereof
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