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WO1994024067A1 - Procede de fabrication de produits frittes au moyen d'un moule carapace en resine - Google Patents

Procede de fabrication de produits frittes au moyen d'un moule carapace en resine Download PDF

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Publication number
WO1994024067A1
WO1994024067A1 PCT/JP1993/000488 JP9300488W WO9424067A1 WO 1994024067 A1 WO1994024067 A1 WO 1994024067A1 JP 9300488 W JP9300488 W JP 9300488W WO 9424067 A1 WO9424067 A1 WO 9424067A1
Authority
WO
WIPO (PCT)
Prior art keywords
sintered
mold
sintered product
resin
shape
Prior art date
Application number
PCT/JP1993/000488
Other languages
English (en)
Japanese (ja)
Inventor
Takeo Nakagawa
Jie Wei
Naoichiro Saito
Seiji Hayano
Original Assignee
Cmet, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP3321226A priority Critical patent/JP2585492B2/ja
Application filed by Cmet, Inc. filed Critical Cmet, Inc.
Priority to PCT/JP1993/000488 priority patent/WO1994024067A1/fr
Publication of WO1994024067A1 publication Critical patent/WO1994024067A1/fr

Links

Classifications

    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/02—Moulding by agglomerating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts

Definitions

  • the present invention relates to a method for manufacturing a sintered product, and particularly to a method for manufacturing a sintered product capable of simplifying a process up to forming a molding die and manufacturing a sintered product having an extremely complicated shape. It is about.
  • a sintered product having a simple external shape such as a dish
  • it is necessary to provide a cavity corresponding to the shape of the sintered product manufacture a mold that can be divided, and use this mold for firing.
  • the binder can be formed into the shape of a sintered product, and this can be sintered.
  • the mold for making the mold is first manufactured, and the mold is made using this (a-2), and the sintered material is filled inside the mold. Then (a-3), preheating is performed to give the sintered material shape-retaining ability, the mold is destroyed (a-4), and this is sintered to produce a sintered product (a-5).
  • a mold for creating a wax model having the same shape as the sintered product to be manufactured is manufactured in advance, and a wax model is created using the mold (b-2).
  • the mold B is filled around the periphery of the wax model (b-3), and the wax model is burned off to form a mold (a-2).
  • the process up to forming the mold is simplified,
  • the aim is to make it possible to easily create a mold with a complicated shape, reduce the production cost of sintered products, and shorten the production period.
  • the present invention is a method of filling a mold with a sintered material and sintering the molded sintered material to produce a sintered product.
  • the photo-curing molding method refers to a resin cured product having a three-dimensional shape corresponding to an irradiation area by irradiating an arbitrary position in three dimensions to a liquid resin that cures when irradiated with light.
  • This is, for example, a technology disclosed in Japanese Patent Application Laid-Open No. 56-144478.
  • the outer resin mold refers to a resin molded product having a hollow space defined by an inner surface inside the outer skin as a main body.
  • a skin resin molding die corresponding to a conventional sintered material molding die is formed at once by a photo-curing molding method.
  • the process up to creation is simplified.
  • a molding die having a remarkably complicated shape can be easily formed by using a die-cutting method, a sintered product having a complicated shape can be easily manufactured. .
  • FIG. 1 is a cross-sectional view of a skin resin mold prepared by a photocuring molding method.
  • Fig. 2 is a process diagram of preparing an outer resin molding die by a photo-curing molding method.
  • Fig. 3 is a process diagram of filling a sintering material into a concave portion of the outer resin molding die.
  • Figure 4 is a cross-sectional view of a sintered product in a high-temperature furnace.
  • FIG. 5 is a diagram comparing the conventional method (a-1 to 5) for producing a sintered product and the lost wax method (b-1 to 3) with the method (c-1 to 4) according to the present invention.
  • the method for manufacturing a sintered product according to the present embodiment includes the following steps.
  • the three-dimensional shape of the sintered product 11, that is, the shape of the outer surface 12 is designed using a three-dimensional CAD system.
  • three-dimensional shape information of the sintered product 11 is defined by the three-dimensional CAD system.
  • the outer resin mold 1 shown in FIG. 1 is prepared. For this, a light curing molding method is used.
  • the surface of a liquid photo-curable resin 2 is irradiated with strong ultraviolet rays 3, thereby curing the resin 2 in the irradiated area, and forming this into several layers.
  • the three-dimensional resin cured image 1 is created by laminating the resin. The obtained shape is determined by the trajectory of the laser beam 3.
  • a spot of the laser beam 3 is applied to the surface of the photo-curable resin 2 filled in the tank, and the laser beam 3 is two-dimensionally moved by the scanner 5. Thereby, a part of the surface is solidified. Then, the solidified material is settled from the liquid surface by the thickness of one layer by the stage 4, and the liquid resin 2 of one layer is introduced on the solidified portion. Next, the liquid portion is similarly solidified. This solid image is laminated and integrated on the lower solidified image. By repeating this, you can add more layers.
  • the present embodiment based on the data of the three-dimensional CAD system, only the portion corresponding to the outside of the outline of the ceramic sintered product 11 is irradiated, and the outer resin molding die 1 is formed. As a result, the inner surface 7 of the outer resin molding die 1 coincides with the outer surface 12 of the sintered product 11.
  • the outer side of the outer shell 6 may be reinforced with a honeycomb structure or the like.
  • the formed outer resin mold 1 is composed of an outer shell 6 and has a substantially box shape in which an upper portion is opened and a concave portion 8 is formed.
  • the inner surface 7 of the resin mold 1 on the side of the concave portion 8 coincides with the outer surface 12 of the sintered product 11. That is, The shape of the recess 8 is the same as the outer shape of the sintered product 11.
  • the outer resin molding die is formed at a stroke by the photo-curing molding method, so that the forming die forming process is greatly simplified.
  • the outer shell resin mold 1 is filled with a sintered material 9. Normally, the sintered material 9 is fluidized by adding water and a deflocculant. After the concave portion 8 is filled with the sintered material 9 by force, the mold 1 is placed in a dryer or a preheating furnace and dried at a predetermined temperature (about 300 ° C.) for a predetermined time.
  • a predetermined temperature about 300 ° C.
  • the dried sintered material 9 is put together with the mold 1 into a high-temperature furnace (600 ° C.).
  • the resin 2 constituting the outer resin mold 1 is burned off. Prior to this burning, the resin 2 expands by heating. Since the outer resin molding die 1 is not solid but has an outer shell structure, the stress due to this thermal expansion is small, and no excessive force acts on the sintered material 9 side. Therefore, cracks do not occur even in places where stress tends to concentrate, such as the groove 13 shown in FIG.
  • the vaporizing gas power of the flour is small, and there is little contamination in the working environment or inside the sintering furnace.
  • the present invention is not limited to ceramic products, and the present invention can be applied as long as it can be manufactured by force sintering described as an example of the ceramic product 11 as a sintered product.
  • powdered metal that hardens by sintering can be used as the sintering material.
  • the manufactured product is not limited to the final product, but may be a part or a mold.
  • the outer resin molding die force is created at once from the three-dimensional CAD data by the photo-curing molding method. Therefore, the production of a sintered product can be performed in a short period of time and at low cost.
  • the shape flexibility of the outer resin mold is large. Therefore, sintered products with complicated shapes can be easily manufactured ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Optics & Photonics (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

Le procédé selon l'invention vise à simplifier la préparation et la formation d'un moule de forme très compliquée de manière à réduire le coût et le temps de fabrication de produits frittés. Le procédé de fabrication de produits frittés consiste à former par une technique de moulage par photodurcissement, un moule carapace en résine dont la surface interne coïncide avec la surface externe d'un produit fritté à fabriquer, à remplir un espace situé dans la surface interne dudit moule carapace en résine d'un matériau à fritter, et à fritter le matériau moulé à fritter.
PCT/JP1993/000488 1991-11-08 1993-04-15 Procede de fabrication de produits frittes au moyen d'un moule carapace en resine WO1994024067A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3321226A JP2585492B2 (ja) 1991-11-08 1991-11-08 外皮樹脂成形型を用いる焼結品製造方法
PCT/JP1993/000488 WO1994024067A1 (fr) 1991-11-08 1993-04-15 Procede de fabrication de produits frittes au moyen d'un moule carapace en resine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3321226A JP2585492B2 (ja) 1991-11-08 1991-11-08 外皮樹脂成形型を用いる焼結品製造方法
PCT/JP1993/000488 WO1994024067A1 (fr) 1991-11-08 1993-04-15 Procede de fabrication de produits frittes au moyen d'un moule carapace en resine

Publications (1)

Publication Number Publication Date
WO1994024067A1 true WO1994024067A1 (fr) 1994-10-27

Family

ID=26434388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1993/000488 WO1994024067A1 (fr) 1991-11-08 1993-04-15 Procede de fabrication de produits frittes au moyen d'un moule carapace en resine

Country Status (2)

Country Link
JP (1) JP2585492B2 (fr)
WO (1) WO1994024067A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8108982B2 (en) 2005-01-18 2012-02-07 Floodcooling Technologies, L.L.C. Compound mold tooling for controlled heat transfer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10697305B2 (en) * 2016-01-08 2020-06-30 General Electric Company Method for making hybrid ceramic/metal, ceramic/ceramic body by using 3D printing process
CN114393751B (zh) * 2022-03-22 2022-05-27 中车戚墅堰机车车辆工艺研究所有限公司 一种模具制备方法、模具及轨道车辆连接件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184605A (ja) * 1983-04-06 1984-10-20 株式会社ヤクルト本社 レリ−フ化粧板の製造方法
JPH02169145A (ja) * 1988-12-22 1990-06-29 Nkk Corp 崩壊性鋳型

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184605A (ja) * 1983-04-06 1984-10-20 株式会社ヤクルト本社 レリ−フ化粧板の製造方法
JPH02169145A (ja) * 1988-12-22 1990-06-29 Nkk Corp 崩壊性鋳型

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8108982B2 (en) 2005-01-18 2012-02-07 Floodcooling Technologies, L.L.C. Compound mold tooling for controlled heat transfer

Also Published As

Publication number Publication date
JP2585492B2 (ja) 1997-02-26
JPH05131429A (ja) 1993-05-28

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