JPH0253146B2 - - Google Patents
Info
- Publication number
- JPH0253146B2 JPH0253146B2 JP30300887A JP30300887A JPH0253146B2 JP H0253146 B2 JPH0253146 B2 JP H0253146B2 JP 30300887 A JP30300887 A JP 30300887A JP 30300887 A JP30300887 A JP 30300887A JP H0253146 B2 JPH0253146 B2 JP H0253146B2
- Authority
- JP
- Japan
- Prior art keywords
- cast
- casting
- core
- metal
- manufacturing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 67
- 229910052751 metal Inorganic materials 0.000 claims description 58
- 239000002184 metal Substances 0.000 claims description 58
- 238000005266 casting Methods 0.000 claims description 51
- 239000007787 solid Substances 0.000 claims description 26
- 230000000452 restraining effect Effects 0.000 claims description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 10
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 4
- 229910052863 mullite Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- -1 sialon Chemical compound 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910016509 CuF 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、鋳ぐるみ製品の製造法に係り、特に
被鋳ぐるみ材と鋳ぐるみ金属との接合性を高めた
鋳ぐるみ製品を製造するための方法に関するもの
である。[Detailed Description of the Invention] (Technical Field) The present invention relates to a method for manufacturing a cast product, and particularly relates to a method for manufacturing a cast product with improved bonding properties between a cast material and a cast metal. It is something.
（従来技術）
従来から、複合鋳造品を得るために、複合させ
られるべき所定形状の部材を被鋳ぐるみ材として
鋳型の鋳造キヤビテイ内に配置せしめ、所定の金
属溶湯を、かかる鋳造キヤビテイ内に注湯して、
鋳造を行なうことにより、かかる被鋳ぐるみ材が
一体的に埋設されてなる鋳ぐるみ製品（鋳造品）
を製造する手法が採用されてきている。(Prior art) Conventionally, in order to obtain a composite cast product, members of a predetermined shape to be composited are placed in a casting cavity of a mold as a cast filling material, and a predetermined molten metal is poured into the casting cavity. Boil water,
A cast product (cast product) in which the cast material is integrally buried through casting.
A method of manufacturing is being adopted.
そして、このような鋳ぐるみ鋳造手法を用いて
得られる鋳ぐるみ製品の一つとして、孔部の周り
に所定の被鋳ぐるみ材が埋設されてなると共に、
かかる被鋳ぐるみ材が孔内面より所定距離隔てて
位置せしめられ、それによつて被鋳ぐるみ材と孔
部との間に所定厚さの鋳ぐるみ金属が介在せしめ
られてなる構造の有孔構造体が知られている。 One of the cast products obtained using such a cast casting method is one in which a predetermined cast material is buried around the hole, and
A porous structure having a structure in which the cast material is positioned at a predetermined distance from the inner surface of the hole, so that a cast metal of a predetermined thickness is interposed between the cast material and the hole. It has been known.
ところで、この鋳ぐるみ製品である有孔構造体
を鋳造するに際しては、その孔部を形成する所定
形状の中子を鋳砂にて形成し、それを鋳型の鋳造
キヤビテイ内に配置せしめる一方、かかる中子の
周りに、所定の被鋳ぐるみ材を該中子から所定距
離隔てて配置せしめた状態下において、金属溶湯
が注湯せしめられることとなる。 By the way, when casting a porous structure that is a cast product, a core of a predetermined shape that forms the hole is formed from casting sand, and while it is placed in the casting cavity of the mold, Molten metal is poured into the core while a predetermined casting material is placed around the core at a predetermined distance from the core.
（問題点）
しかしながら、かかる有孔構造体からなる鋳ぐ
るみ製品を製造するに際して、被鋳ぐるみ材とし
て、セラミツクス等の鋳ぐるみ金属より熱膨張率
の低い材料を用いて、鋳ぐるみ鋳造を実施した場
合においては、鋳ぐるみ後の冷却中に、被鋳ぐる
み材の内周面（中子対向面）と鋳ぐるみ金属との
間に接合不良が生じ易い問題があつたのである。
即ち、被鋳ぐるみ材に対して鋳ぐるみ金属の熱膨
張率が高い場合、それらの熱膨張率差により、鋳
ぐるみ後の冷却中に被鋳ぐるみ材と金属との間に
収縮差が生じ、被鋳ぐるみ材の内周面と鋳ぐるみ
固化金属との間にギヤツプ（隙間）が発生し易
く、そしてそれによつて、そこに接合不良が惹起
されるようになるのである。(Problem) However, when producing a cast product made of such a perforated structure, a material having a lower coefficient of thermal expansion than the cast metal, such as ceramics, is used as the cast material to perform cast casting. In some cases, during cooling after casting, there was a problem in which poor bonding easily occurred between the inner circumferential surface of the cast material (the surface facing the core) and the casting metal.
In other words, when the thermal expansion coefficient of the casting metal is higher than that of the casting material, the difference in thermal expansion coefficient causes a shrinkage difference between the casting material and the metal during cooling after casting. A gap is likely to occur between the inner circumferential surface of the cast material and the cast solidified metal, and this leads to poor bonding there.
従つて、そのような接合不良の生じた鋳ぐるみ
製品にあつては、最早、その複合材としての充分
な機能を発揮することが困難となるのであり、そ
れが最終用途に適用された場合において、一体的
に保持されるべき被鋳ぐるみ材が脱落する等の問
題を惹起することとなるのである。 Therefore, cast products with such bonding defects will no longer be able to perform their full function as composite materials, and when they are applied to their final uses. This causes problems such as the cast material that should be held integrally falling off.
（解決手段）
ここにおいて、本発明は、上記した問題を解消
するものであつて、その特徴とするところは、鋳
造キヤビテイ内の中子の周りに、所定の被鋳ぐる
み材を、該中子から所定距離隔てて配置せしめた
状態下において、所定の金属溶湯の鋳造を行なう
ことにより、該中子によつて形成される孔部の周
りに前記被鋳ぐるみ材が埋設されてなる有孔構造
体からなる鋳ぐるみ製品を製造するに際して、前
記中子の少なくとも前記被鋳ぐるみ材に対向する
部分を、該被鋳ぐるみ材と該中子との間における
前記金属溶湯の凝固・冷却に基づく内方への収縮
を拘束する固体拘束部材にて、構成するようにし
たのである。(Solution Means) Here, the present invention solves the above-mentioned problems, and its feature is that a predetermined casting material is placed around the core in the casting cavity. A porous structure in which the casting material is embedded around a hole formed by the core by casting a predetermined molten metal while the core is placed at a predetermined distance from the core. When manufacturing a cast product consisting of a molded body, at least the portion of the core facing the cast material is subjected to internal cooling based on the solidification and cooling of the molten metal between the cast material and the core. The structure is made of a solid restraining member that restrains contraction in the opposite direction.
（作用）
このように、本発明に従う鋳ぐるみ手法にあつ
ては、目的とする有孔構造体の孔部を与える中子
として、少なくとも被鋳ぐるみ材に対向する部分
が、金属溶湯の凝固、そしてその凝固したものの
冷却に基づく内方への収縮を拘束する固体拘束部
材にて、構成された中子を用いるものであるとこ
ろから、鋳ぐるみ後の冷却中の金属の収縮変形
は、かかる中子の固体拘束部材部分にて矯正（拘
束）されるようになり、それによつて、被鋳ぐる
み材の内側、換言すれば孔部側に存在する金属の
収縮が抑制されて、被鋳ぐるみ材内周面に対する
密着状態が効果的に保持されるようになるのであ
る。そして、冷却固化の後、得られた鋳ぐるみ鋳
造品から、中子の一端をプレス機等で押し出すこ
とによつて、かかる中子を離型せしめることによ
り、目的とする健全な鋳ぐるみ有孔構造体が得ら
れるのである。(Function) As described above, in the casting method according to the present invention, at least the portion facing the casting material is used as a core that provides the holes of the intended porous structure, and is capable of solidifying the molten metal. Since the core is made of a solid restraining member that restrains the inward contraction of the solidified material as it cools, the contraction and deformation of the metal during cooling after casting is caused by the shrinkage and deformation of the metal during cooling. The material is straightened (restricted) by the solid restraining member part of the child, thereby suppressing the shrinkage of the metal existing on the inside of the cast material, in other words, on the hole side, and tightening the cast material. This allows the state of close contact with the inner circumferential surface to be effectively maintained. After cooling and solidifying, one end of the core is extruded from the obtained cast molded product using a press machine, etc., and the core is released from the mold. A structure is obtained.
（具体的構成）
ところで、かかる本発明において、鋳造キヤビ
テイ内の中子の周りに、所定の被鋳ぐるみ材を、
該中子から所定距離隔てて配置せしめた状態下に
おいて、所定の金属溶湯の鋳造を行なうことによ
り得られる、該中子によつて形成される孔部の周
りに前記被鋳ぐるみ材が埋設されてなる有孔構造
体からなる複合構造の鋳ぐるみ製品としては、各
種の形状、構造のものがあり、内燃機関のピスト
ンヘツド部品等として有利に用いられ得るもので
あつて、それぞれの用途に応じて、その複合形態
が適宜に決定されることとなるが、その単純な形
態の一例が第１図に示されている。(Specific configuration) By the way, in the present invention, a predetermined cast material is placed around the core in the casting cavity.
The casting material is embedded around a hole formed by the core, which is obtained by casting a predetermined molten metal while being placed at a predetermined distance from the core. There are various shapes and structures of cast products with composite structures consisting of perforated structures, and they can be advantageously used as piston head parts of internal combustion engines, etc., depending on the purpose. Therefore, its complex form is determined as appropriate, and an example of its simple form is shown in FIG.
すなわち、第１図において、鋳ぐるみ製品であ
る有孔構造体２は、厚肉の円筒形状を呈し、その
中心部に貫通孔４を有している。そして、この貫
通孔４の周りに、リング状の被鋳ぐるみ材６が所
定深さにおいて鋳ぐるみ金属８中に埋設されてい
る一方、かかる被鋳ぐるみ材６と中心部の貫通孔
４内面との間には、鋳ぐるみ金属８が所定厚さに
おいて存在する構造となつている。なお、被鋳ぐ
るみ材６や鋳ぐるみ金属８の材質としては、有孔
構造体２からなる鋳ぐるみ製品の用途に応じて適
宜に選定されることとなるが、一般に、被鋳ぐる
み材６は、窒化珪素、サイアロン、炭化珪素、ム
ライト、アルミナ、ジルコニア、コージエライト
等のセラミツクスからなるものであり、また鋳ぐ
るみ金属８としては、アルミニウム（Al）合金
等の金属が選ばれることとなる。 That is, in FIG. 1, a perforated structure 2, which is a cast product, has a thick cylindrical shape and has a through hole 4 in its center. A ring-shaped cast material 6 is buried in the cast metal 8 at a predetermined depth around the through hole 4, and the inner surface of the through hole 4 in the center is connected to the ring-shaped cast material 6 at a predetermined depth. The structure is such that a cast metal 8 is present at a predetermined thickness between them. The material of the cast material 6 and the cast metal 8 will be appropriately selected depending on the application of the cast product made of the perforated structure 2, but in general, the material of the cast material 6 is , silicon nitride, sialon, silicon carbide, mullite, alumina, zirconia, cordierite, or other ceramics, and as the casting metal 8, a metal such as an aluminum (Al) alloy is selected.
そして、このような有孔構造体２を鋳造するに
際しては、第２図に示されるように、従来から公
知の鋳砂にて構成される鋳型１０を用い、その内
部に形成された鋳造キヤビテイ１２内の所定位置
に被鋳ぐるみ材６を配置せしめ、そして貫通孔４
が形成されるように、中子１４を存在せしめた下
で、鋳型１０の注湯口１６を通じてAl合金溶湯
等の所定の金属溶湯１８が注湯されることとなる
のであるが、その際、目的とする有孔構造体２の
貫通孔４を形成する中子１４を、特定の部材にて
構成したところに、本発明の大きな特徴があるの
である。 When casting such a perforated structure 2, as shown in FIG. The cast material 6 is placed at a predetermined position within the through hole 4.
A predetermined molten metal 18 such as Al alloy molten metal is poured through the pouring port 16 of the mold 10 with the core 14 present so as to form a mold. A major feature of the present invention is that the core 14 that forms the through hole 4 of the perforated structure 2 is made of a specific material.
すなわち、本発明にあつては、かかる中子１４
の、少なくとも前記被鋳ぐるみ材６に対向する部
分、換言すれば第２図において、被鋳ぐるみ材６
の内周面に対向する中子１４部分を少なくとも含
む部位を、被鋳ぐるみ材６と中子１４との間にお
ける金属溶湯１８の凝固、更にはその凝固物の冷
却に基づく内方（中子１４側）への収縮を拘束す
る一体的な固体拘束部材にて構成するようにした
のであり、これによつて、被鋳ぐるみ材６の内周
面に対する金属溶湯１８の凝固物（鋳ぐるみ金属
８）の離間を抑制せしめ、以てそれらの間に隙間
（ギヤツプ）が生じるのを阻止して、被鋳ぐるみ
材６内周面への密着性を確保するようにしたので
ある。なお、この中子１４は、その製作上の容易
性等の点から、一般に、その全体が固体拘束部材
にて構成されることとなる。 That is, in the present invention, such a core 14
At least the part facing the cast material 6, in other words, in FIG.
The part including at least the part of the core 14 facing the inner circumferential surface of the core 14 is solidified between the molten metal 18 and the core 14, and further the inner part (core 14) is The structure is made of an integral solid restraining member that restrains the shrinkage of the molten metal 18 against the inner circumferential surface of the cast material 6. 8), thereby preventing a gap from forming between them, thereby ensuring close contact with the inner circumferential surface of the cast material 6. Note that, from the viewpoint of ease of manufacturing, the core 14 is generally constructed entirely of a solid restraining member.
ところで、かかる中子１４の少なくとも被鋳ぐ
るみ材６に対向する部分を含む部位を構成する固
体拘束部材としては、一般に、前記金属溶湯１８
の凝固により形成される鋳ぐるみ金属８よりも小
さな熱膨張率を有するように、適宜にその材質が
選定されることとなるが、特にかかる固体拘束部
材の熱膨張率は、被鋳ぐるみ材６の熱膨張率と同
程度か、或いはそれ以下であることが望ましい。
そして、かかる固体拘束部材の熱膨張率を、被鋳
ぐるみ材６と同程度以下とすることにより、鋳ぐ
るみ金属８，１８の塑性変形による被鋳ぐるみ材
６の内周面の密着は、より完全なものとなるので
ある。 By the way, as a solid restraining member constituting a portion of the core 14 that includes at least the portion facing the cast surrounding material 6, the molten metal 18 is generally used as a solid restraining member.
The material is appropriately selected so as to have a coefficient of thermal expansion smaller than that of the cast metal 8 formed by the solidification of the solid restraining member. It is desirable that the coefficient of thermal expansion is about the same as or lower than that of .
By setting the coefficient of thermal expansion of the solid restraining member to the same level or lower as that of the cast material 6, the close contact between the inner circumferential surface of the cast material 6 due to the plastic deformation of the cast metals 8 and 18 is improved. It becomes complete.
特に、かかる固体拘束部材は、被鋳ぐるみ材６
と実質的に同一の材質からなるものであることが
望ましい。なお、ここで、実質的に同一とは、主
構成相が同一で、熱膨張率が同程度以下であれば
よいことを意味している。この固体拘束部材の材
質が被鋳ぐるみ材６と実質的に同一であることが
好ましい理由は、熱膨張率が略同一で、しかも鋳
ぐるみ時に必要な耐熱衝撃性も同一と考えられる
からである。 In particular, such a solid restraining member is
It is desirable that the material be made of substantially the same material as the material. Here, "substantially the same" means that the main constituent phases are the same and the coefficients of thermal expansion are approximately the same or less. The reason why it is preferable that the material of this solid restraining member is substantially the same as that of the material to be cast 6 is that the coefficient of thermal expansion is approximately the same, and the thermal shock resistance necessary for casting is also considered to be the same. .
ところで、中子１４の少なくとも一部を構成す
る上述の如き一体の固体拘束部材は、鋳ぐるみ時
の熱衝撃に耐え、しかも鋳ぐるみ金属８の塑性変
形を支える強度を持つている必要があるところか
ら、この点において、かかる固体拘束部材として
は、窒化珪素、サイアロン、炭化珪素、ムライ
ト、アルミナ、ジルコニア、コージエライト等の
セラミツクスからなるものであることが望まし
く、また石英ガラス、結晶化ガラス等の無機材料
からなるものでも好適である。通常のガラスは、
一般に、軟化温度が鋳ぐるみ温度（金属溶湯１８
の温度）より低くなるので好ましくないが、鋳ぐ
るみ金属８（金属溶湯１８）の凝固温度より軟化
温度が高いものであれば、ガラスを用いることも
可能である。例えば、金属溶湯１８がAl合金溶
湯である場合において、Al合金溶湯より高融点
で熱膨張率が低ければ、どのような材料でも使用
することが出来、金属を材質とすることも出来る
が、その場合には、Al合金と濡れ難いものがよ
く、またAl合金と濡れ難いPbを表面層としたク
ラツド材からなる拘束部材も使用可能である。 By the way, the above-mentioned integral solid restraint member constituting at least a part of the core 14 must have the strength to withstand thermal shock during casting and to support the plastic deformation of the cast metal 8. In this respect, it is desirable that such a solid restraint member be made of ceramics such as silicon nitride, sialon, silicon carbide, mullite, alumina, zirconia, cordierite, etc., and inorganic materials such as quartz glass and crystallized glass. Materials made of such materials are also suitable. Ordinary glass is
Generally, the softening temperature is the casting temperature (molten metal 18
Glass can also be used as long as it has a softening temperature higher than the solidification temperature of the cast metal 8 (molten metal 18). For example, when the molten metal 18 is an Al alloy molten metal, any material can be used as long as it has a higher melting point and a lower coefficient of thermal expansion than the Al alloy molten metal, and metal can be used as the material. In some cases, a material that is difficult to wet with the Al alloy is preferable, and a restraining member made of a clad material with a surface layer made of an Al alloy and Pb, which is hard to wet, can also be used.
また、このような少なくとも一部が固体拘束部
材にて一体的に構成されてなる中子１４は、鋳ぐ
るみ後において、得られた鋳造物から取り出され
る（抜き出される）必要であるところから、第２
図に示されるように、中子１４を構成する固体拘
束部材をテーパー形状において形成したり、長手
方向に複数分割する構造としたり、更には、その
表面に固体潤滑部材を存在せしめたり、或いは塗
布したりすることによつて、中子１４の離型性は
向上せしめられ得ることとなる。 Further, since the core 14, at least a part of which is integrally formed with a solid restraining member, needs to be taken out (extracted) from the obtained casting after casting, Second
As shown in the figure, the solid restraining member constituting the core 14 may be formed in a tapered shape, or may be divided into multiple parts in the longitudinal direction, or a solid lubricating member may be present on its surface, or may be coated with a solid lubricating member. By doing so, the releasability of the core 14 can be improved.
さらに、かかる中子１４を構成する固体拘束部
材の少なくとも鋳ぐるみ金属８（金属溶湯１８）
と接する面に、かかる鋳ぐるみ金属と焼付き難い
金属を、例えば箔状として巻き付けたり、プラズ
マスプレー等により溶射しておくと、また中子１
４の離型を容易にすることが出来る。 Further, at least the cast metal 8 (molten metal 18) of the solid restraining member constituting the core 14
If a metal that is hard to seize with the casting metal is wrapped around the surface in contact with the core 1, for example, in the form of a foil or thermally sprayed with plasma spray, etc.
4 can be easily released from the mold.
なお、鋳ぐるみ金属８としてAl合金を用いた
場合において、このAl合金と焼付き難い金属と
しては、例えば、Cd、In、Tl、Pb、Biがあり、
これらの金属にて固体拘束部材を構成したり、ま
たそれら金属成分を含む合金を用いて固体拘束部
材が形成されることによつて、離型性が向上され
る。そのなかでも、特にPbは取扱が容易で好ま
しい金属である。更にまた、固体拘束部材の中
に、MoO3、MoS2、CuF2、LiF等の固体潤滑材
を含有せしめておくことにより、その離型性を更
に向上させることが出来る。 In addition, when an Al alloy is used as the cast metal 8, metals that are difficult to seize with this Al alloy include, for example, Cd, In, Tl, Pb, and Bi.
The mold releasability is improved by forming the solid restraint member using these metals or by forming the solid restraint member using an alloy containing these metal components. Among these, Pb is a preferred metal because it is easy to handle. Furthermore, by containing a solid lubricant such as MoO 3 , MoS 2 , CuF 2 , LiF, etc. in the solid restraining member, the mold release property can be further improved.
以上、第１図に示される最も簡単な構造の有孔
構造体２の一例に基づいて、本発明に従う鋳ぐる
み製品の製造手法を詳細に説明してきたが、先に
も述べたように、かかる有孔構造体の形状、構造
は、その用途に応じて適宜に変更され得るもので
あり、また有孔構造体の孔部の形態にあつても、
第１図に示される如き貫通孔４形態ばかりでな
く、一端が閉塞された孔形態、更には第３図に示
される如き、所定深さの凹所２４形態のものであ
つても、何等差支えないのである。なお、第３図
において、２０は鋳ぐるみ製品としての有孔構造
体であり、２６は被鋳ぐるみ材、２８は鋳ぐるみ
金属である。 Above, the manufacturing method of a cast product according to the present invention has been explained in detail based on an example of the perforated structure 2 having the simplest structure shown in FIG. The shape and structure of the porous structure can be changed as appropriate depending on its use, and even if the shape of the hole in the porous structure is
There is no problem with not only the four through holes as shown in FIG. 1, but also the holes with one end closed, and even 24 recesses of a predetermined depth as shown in FIG. There isn't. In addition, in FIG. 3, 20 is a perforated structure as a cast product, 26 is a cast material, and 28 is a cast metal.
別体で作成した上面に凹部を持つ金属製ピスト
ン本体の上面凹部に、第３図に示す鋳ぐるみ体を
嵌合し、例えばボルト締め、溶接、ろう付け等の
常法により金属同志を結合して、セラミツク−金
属複合ピストンを得ることが出来る。また、ピス
トンを形成するように鋳型及び固体拘束部材を構
成して鋳ぐるむことにより、鋳ぐるみ一工程でセ
ラミツク−金属複合ピストンを得ることが出来
る。 The cast body shown in Fig. 3 is fitted into the recess on the upper surface of the metal piston body, which has a recess on the upper surface, which was made separately, and the metal members are joined together by a conventional method such as bolting, welding, or brazing. Thus, a ceramic-metal composite piston can be obtained. Furthermore, by constructing a mold and a solid restraining member to form a piston and casting the piston, a ceramic-metal composite piston can be obtained in one casting process.
要するに、本発明には、上記した具体的記述の
他にも、また以下の実施例以外にも、本発明の趣
旨を逸脱しない限りにおいて、当業者の知識に基
づいて種々なる変更、修正、改良等を加え得るも
のであることが、理解されるべきである。 In short, in addition to the above-described specific description and the following examples, the present invention includes various changes, modifications, and improvements based on the knowledge of those skilled in the art, as long as they do not depart from the spirit of the present invention. It should be understood that the following may be added.
（実施例）
以下に、本発明の幾つかの実施例を示し、本発
明を更に具体的に明らかにすることとするが、本
発明が、そのような実施例の記載によつて、何等
の制約をも受けるものでないことは、言うまでも
ないところである。(Examples) Below, some examples of the present invention will be shown to clarify the present invention more specifically. Needless to say, it is not subject to any restrictions.
実施例 １
第１図に示されるものと同様な構造の有孔構造
体２を、第２図に示される如き鋳ぐるみ鋳造方式
にて鋳造した。なお、被鋳ぐるみ材６としては、
窒化珪素焼結体からなる、外径：120mm、内径：
100mm、厚さ：20mmの有孔円板を用い、また中子
１４としては、かかる有孔円板と同一材質の窒化
珪素焼結体からなる、一端の直径が80mmで、他端
にかけて10゜のテーパーを持ち、厚さが20mm、表
面粗さがRnax：3.2μの円柱体を用い、第２図に示
される如く、鋳砂にて形成された鋳型１０の鋳造
キヤビテイ１２内にセツトして、Al合金溶湯１
８を注湯口１６から注湯して、目的とする窒化珪
素製有孔円板を被鋳ぐるみ材６として有する鋳ぐ
るみ製品２を鋳造した。Al合金溶湯１８の冷
却・凝固の後、鋳型１０から取り出された鋳造物
から、プレス機により、窒化珪素系円柱体１４
を、その小径側から押し出し、窒化珪素−Al合
金複合中空体を得た。Example 1 A perforated structure 2 having a structure similar to that shown in FIG. 1 was cast by the cast-through casting method as shown in FIG. 2. In addition, as the cast material 6,
Made of silicon nitride sintered body, outer diameter: 120mm, inner diameter:
A perforated disc of 100 mm and a thickness of 20 mm was used, and the core 14 was made of a silicon nitride sintered body made of the same material as the perforated disc, with a diameter of 80 mm at one end and a diameter of 10° from the other end. A cylindrical body with a taper of 20 mm and a surface roughness R nax of 3.2 μ was used, and as shown in Fig. 2, it was set in the casting cavity 12 of the mold 10 formed of casting sand. Al alloy molten metal 1
8 was poured from the pouring port 16 to cast a cast product 2 having the intended perforated disk made of silicon nitride as the cast material 6. After cooling and solidifying the Al alloy molten metal 18, the silicon nitride-based cylindrical body 14 is made from the casting taken out from the mold 10 using a press machine.
was extruded from the small diameter side to obtain a silicon nitride-Al alloy composite hollow body.
かくして得られた複合体を、蛍光浸透探傷法、
Ｘ線透過法、及び超音波探傷法により、それぞれ
検査したが、被鋳ぐるみ材６としての窒化珪素製
有孔円板とAl合金との境界部には、何等の欠陥
も認め得なかつた。 The thus obtained composite was subjected to fluorescent penetrant testing,
Inspection was performed using an X-ray transmission method and an ultrasonic flaw detection method, but no defects were found at the boundary between the silicon nitride perforated disk serving as the casting material 6 and the Al alloy.
実施例 ２
外径：40mm、内径：30mm、長さ：100mmの部分
安定化ジルコニアパイプを、被鋳ぐるみ材６とす
る一方、直径：20mm、長さ：100mm、表面粗さ
（Rnax）：1.6μのムライト磁器製円柱を長手方向に
４分割したものを、中子１４として用い、Al合
金８，１８により鋳ぐるみ鋳造を行なつた。Al
合金溶湯１８の凝固・冷却後、プレス機により鋳
造物中のムライト磁器製円柱を押し出すことによ
り、部分安定化ジルコニアの内外壁に、それぞれ
５mm厚さのAl合金層を有する複合体を得た。Example 2 A partially stabilized zirconia pipe with an outer diameter of 40 mm, an inner diameter of 30 mm, and a length of 100 mm was used as the casting material 6, while the diameter was 20 mm, the length was 100 mm, and the surface roughness (R nax ): A 1.6 μm mullite porcelain cylinder divided into four in the longitudinal direction was used as the core 14, and cast casting was performed using Al alloys 8 and 18. Al
After solidifying and cooling the molten alloy 18, the mullite porcelain cylinder in the casting was extruded using a press to obtain a composite having Al alloy layers each having a thickness of 5 mm on the inner and outer walls of partially stabilized zirconia.
この得られた複合体を実施例１と同様の方法に
て検査したが、部分安定化ジルコニアとAl合金
層との間の境界面には、何等の欠陥も認められな
かつた。 This obtained composite was inspected in the same manner as in Example 1, and no defects were observed at the interface between the partially stabilized zirconia and the Al alloy layer.
（発明の効果）
以上の説明から明らかなように、本発明に従え
ば、被鋳ぐるみ材、特にその内周面と鋳ぐるみ金
属との間にギヤツプ（隙間）の発生しない、密着
性の良好な、健全な鋳ぐるみ製品（複合体）を得
ることが出来るのであり、これによつて、例えば
ピストンヘツド等の、中空セラミツクスを鋳ぐる
んでなる有孔構造体を有利に製造し得ることとな
つたのである。(Effects of the Invention) As is clear from the above explanation, according to the present invention, there is no gap between the cast material, especially the inner peripheral surface thereof, and the cast metal, and good adhesion is achieved. It is possible to obtain a healthy cast product (composite), and this makes it possible to advantageously manufacture perforated structures such as piston heads, which are made by casting hollow ceramics. It was.
第１図は、本発明に従つて製造される鋳ぐるみ
製品の最も簡単な一例を示す断面説明図であり、
第２図は、そのような鋳ぐるみ製品を製造するた
めの鋳型内構造を示す断面説明図であり、第３図
は本発明に従つて製造される鋳ぐるみ製品の他の
一例を示す断面図である。
２，２０：有孔構造体、４：貫通孔、６，２
６：被鋳ぐるみ材、８，２８：鋳ぐるみ金属、１
０：鋳型、１２：鋳造キヤビテイ、１４：中子、
１８：金属溶湯、２４：凹所（孔部）。
FIG. 1 is an explanatory cross-sectional view showing the simplest example of a cast product manufactured according to the present invention.
FIG. 2 is an explanatory cross-sectional view showing the internal structure of a mold for manufacturing such a cast product, and FIG. 3 is a cross-sectional view showing another example of a cast product manufactured according to the present invention. It is. 2, 20: Porous structure, 4: Through hole, 6, 2
6: Casting material, 8, 28: Casting metal, 1
0: Mold, 12: Casting cavity, 14: Core,
18: Molten metal, 24: Recess (hole).
Claims (1)
鋳ぐるみ材を、該中子から所定距離隔てて配置せ
しめた状態下において、所定の金属溶湯の鋳造を
行なうことにより、該中子によつて形成される孔
部の周りに前記被鋳ぐるみ材が埋設されてなる有
孔構造体からなる鋳ぐるみ製品を製造するに際し
て、前記中子の少なくとも前記被鋳ぐるみ材に対
向する部分を、該被鋳ぐるみ材と該中子との間に
おける前記金属溶湯の凝固・冷却に基づく内方へ
の収縮を拘束する固体拘束部材にて、構成したこ
とを特徴とする鋳ぐるみ製品の製造法。 ２ 前記固体拘束部材が、前記金属溶湯を与える
金属よりも小さな熱膨張率を有している特許請求
の範囲第１項記載の製造法。 ３ 前記固体拘束部材が、前記被鋳ぐるみ材と実
質的に同一の材質からなるものである特許請求の
範囲第１項または第２項記載の製造法。 ４ 前記被鋳ぐるみ材が、セラミツクスからなる
特許請求の範囲第１項乃至第３項の何れかに記載
の製造法。 ５ 前記被鋳ぐるみ材が、窒化珪素からなる特許
請求の範囲第４項記載の製造法。 ６ 前記金属溶湯が、アルミニウム合金溶湯であ
る特許請求の範囲第１項乃至第５項の何れかに記
載の製造法。[Claims] 1. By casting a predetermined molten metal in a state in which a predetermined casting material is placed around a core in a casting cavity at a predetermined distance from the core. , when manufacturing a cast product consisting of a perforated structure in which the cast material is embedded around a hole formed by the core, at least the cast material of the core is A cast toy, characterized in that opposing portions are constituted by a solid restraining member that restrains inward contraction due to solidification and cooling of the molten metal between the cast toy material and the core. How the product is manufactured. 2. The manufacturing method according to claim 1, wherein the solid restraint member has a coefficient of thermal expansion smaller than that of the metal providing the molten metal. 3. The manufacturing method according to claim 1 or 2, wherein the solid restraint member is made of substantially the same material as the cast material. 4. The manufacturing method according to any one of claims 1 to 3, wherein the cast material is made of ceramics. 5. The manufacturing method according to claim 4, wherein the casting material is made of silicon nitride. 6. The manufacturing method according to any one of claims 1 to 5, wherein the molten metal is a molten aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30300887A JPH01143755A (en) | 1987-11-30 | 1987-11-30 | Manufacture of internal chilling product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30300887A JPH01143755A (en) | 1987-11-30 | 1987-11-30 | Manufacture of internal chilling product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01143755A JPH01143755A (en) | 1989-06-06 |
| JPH0253146B2 true JPH0253146B2 (en) | 1990-11-15 |
Family
ID=17915825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30300887A Granted JPH01143755A (en) | 1987-11-30 | 1987-11-30 | Manufacture of internal chilling product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01143755A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5070110B2 (en) * | 2008-04-02 | 2012-11-07 | 本田技研工業株式会社 | Manufacturing equipment for rotors for rotating electrical machines |
-
1987
- 1987-11-30 JP JP30300887A patent/JPH01143755A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01143755A (en) | 1989-06-06 |
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