JP2001038450A - Casting core, casting core manufacture, and casting method using this casting core - Google Patents
Casting core, casting core manufacture, and casting method using this casting coreInfo
- Publication number
- JP2001038450A JP2001038450A JP11213233A JP21323399A JP2001038450A JP 2001038450 A JP2001038450 A JP 2001038450A JP 11213233 A JP11213233 A JP 11213233A JP 21323399 A JP21323399 A JP 21323399A JP 2001038450 A JP2001038450 A JP 2001038450A
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- Prior art keywords
- core
- casting
- melting point
- low melting
- metal
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は例えばシリンダヘッ
ド等を鋳造する際に使用する鋳造用中子、この鋳造用中
子の製造方法及びこの鋳造用中子を用いた鋳造法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting core used for casting, for example, a cylinder head and the like, a method of manufacturing the casting core, and a casting method using the casting core.
【０００２】[0002]
【従来の技術】シリンダヘッドを例にとって説明する
と、シリンダヘッドにはポートやウォータジャケット等
の型抜き成形ができない箇所があり、これらポートやウ
ォータジャケットを鋳造の際に同時に成形するため、鋳
型内に予めポート形状やウォータジャケット形状をした
中子をセットし、鋳造後に中子を崩壊して除去するよう
にしている。2. Description of the Related Art Taking a cylinder head as an example, the cylinder head has portions such as ports and water jackets which cannot be stamped and formed. Since these ports and water jackets are formed at the same time as casting, they are placed in a mold. A core having a port shape or a water jacket shape is set in advance, and the core is collapsed and removed after casting.
【０００３】上記中子はシェル砂を有機バインダ等で固
めてコアとし、このコア表面に鋳造時の溶湯圧に耐える
ための耐圧コーティング層を焼成にて形成し、更にこの
耐圧コーティングの外側に剥離コーティング層を形成し
ている。[0003] The core is obtained by solidifying shell sand with an organic binder or the like to form a core, forming a pressure-resistant coating layer on the surface of the core by means of baking to withstand the pressure of the molten metal at the time of casting, and peeling the coating outside the pressure-resistant coating. A coating layer is formed.
【０００４】上記の鋳造用中子を用いて鋳造すると、耐
圧コーティング層及び剥離コーティング層が溶湯（アル
ミ合金）と一体となり、ポートやウォータジャケットの
内表面に残ってしまい、その除去が面倒である。[0004] When casting is performed using the above-described casting core, the pressure-resistant coating layer and the release coating layer are integrated with the molten metal (aluminum alloy) and remain on the inner surface of the port or the water jacket, and the removal thereof is troublesome. .
【０００５】そこで、特願昭５６−１６０８５４号公報
に提案される技術が知られている。この公報には、図７
（ａ）〜（ｃ）に示すように、水溶性材料からなる中子
１００の表面に、プラズマアーク溶射、または酸水素炎
溶射等によって、ＺnやＡl等の金属被膜１０１を形成
し、この中子１００を鋳造型１０２にセットし、溶湯１
０３を充填し、鋳造後に上記金属被膜１０１を中空部周
壁面１０４に残す内容が開示されている。Therefore, a technique proposed in Japanese Patent Application No. 56-160854 is known. In this publication, FIG.
As shown in (a) to (c), a metal coating 101 such as Zn or Al is formed on the surface of a core 100 made of a water-soluble material by plasma arc spraying or oxyhydrogen flame spraying. The core 100 is set in the casting mold 102 and the molten metal 1
No. 03 is filled, and the metal coating 101 is left on the peripheral wall surface 104 after casting.
【０００６】[0006]
【発明が解決しようとする課題】上述した先行技術によ
れば、耐圧コーティング及び剥離コーティングが溶湯と
一体になって成形面に差し込む不利はなくなるが、金属
被膜としては溶湯温度よりも融点が高いものを選定する
必要があるため、金属被膜と中空部周壁面との間の接合
力はそれほど高くならず、金属被膜が剥離しやすい。According to the above-mentioned prior art, there is no disadvantage that the pressure-resistant coating and the release coating are integrated with the molten metal and inserted into the molding surface, but the metal coating has a melting point higher than the temperature of the molten metal. Therefore, the joining force between the metal film and the peripheral wall surface of the hollow portion is not so high, and the metal film is easily peeled.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決すべく本
発明に係る鋳造用中子は、シェル砂などを固めてなるコ
アの外側がアルミ箔等の金属層で被覆され、この金属層
の表面に低融点合金層が形成された構成とした。In order to solve the above-mentioned problems, a casting core according to the present invention has a core formed by solidifying shell sand or the like covered with a metal layer such as an aluminum foil. The low melting point alloy layer was formed on the surface.
【０００８】低融点合金層を設けることで、アルミ箔等
の金属層とアルミニウム等の金属溶湯との間で金属拡散
が促進され、鋳造後に金属箔を鋳造品側に残した際の接
合力を高めることができる。ここで、低融点合金として
は、Ｚn（亜鉛）：８５〜９６wt%、Ｓn（錫）：１０〜
１５wt%、Ｍg：１．０〜１．５wt%で、融点が４００℃
以下であるものが好ましい。Ｚn（亜鉛）を８５〜９６w
t%とし、Ｓn（錫）を１０〜１５wt%としたのは、鋳造品
と金属箔間に所定の接合強度を確保するためであり、Ｍ
gを１．０〜１．５wt%としたのは、金属箔の金属溶湯へ
の拡散性を向上するためである。By providing the low melting point alloy layer, metal diffusion between the metal layer such as aluminum foil and the molten metal such as aluminum is promoted, and the bonding force when the metal foil is left on the casting after casting is reduced. Can be enhanced. Here, as the low melting point alloy, Zn (zinc): 85 to 96 wt%, Sn (tin): 10 to
15 wt%, Mg: 1.0-1.5 wt%, melting point 400 ° C
The following are preferred. 85-96w of Zn (zinc)
The reason why the content of Sn (tin) is set to 10 to 15 wt% is to secure a predetermined bonding strength between the casting and the metal foil.
The reason why g is set to 1.0 to 1.5 wt% is to improve the diffusivity of the metal foil into the molten metal.
【０００９】また、本発明に係る鋳造用中子の製造方法
は、予めアルミ箔等の金属箔の一面側に低融点合金層を
形成しておき、この金属箔を中子成形用金型のキャビテ
ィ内に前記低融点合金層を形成した面が外側になるよう
にセットし、次いで、金属箔で内側面が被覆されたキャ
ビティ内にシェル砂を吹き込んで充填し、更に加熱して
シェル砂をバインダで固めるようにした。In the method of manufacturing a core for casting according to the present invention, a low melting point alloy layer is formed on one side of a metal foil such as an aluminum foil in advance, and this metal foil is used as a core forming die. The cavity is set so that the surface on which the low-melting-point alloy layer is formed is located outside, and then the shell sand is filled by blowing shell sand into the cavity whose inner surface is covered with metal foil, and further heated to reduce the shell sand. I fixed it with a binder.
【００１０】前記方法では、予め金属箔の一面側に低融
点合金層を形成しておいたが、中子のコアを金属箔で被
覆した後に、金属箔表面に低融点合金層を形成してもよ
い。これにより、鋳造工程において、低融点合金を媒介
として金属箔と金属溶湯との金属拡散層が効果的に形成
される。In the above method, the low melting point alloy layer is formed on one side of the metal foil in advance, but after the core of the core is covered with the metal foil, the low melting point alloy layer is formed on the surface of the metal foil. Is also good. Thereby, in the casting process, the metal diffusion layer of the metal foil and the molten metal is effectively formed by using the low melting point alloy as a medium.
【００１１】更に、上記の鋳造用中子を用いた本発明に
係る鋳造法は、鋳造用中子を鋳型のキャビティ内にセッ
トし、次いで溶湯を充填し、冷却固化せしめた後に離型
し、この後鋳造用中子を崩壊除去するとともに低融点合
金層を介して金属箔を鋳造品側に残す構成とする。即
ち、金属箔は低融点合金を介して、溶湯と拡散接合さ
れ、そこに金属拡散層を形成しつつ、鋳造品側に残され
る。Further, in the casting method according to the present invention using the above-described casting core, the casting core is set in a cavity of a mold, then filled with a molten metal, cooled and solidified, and then released. Thereafter, the casting core is collapsed and removed, and the metal foil is left on the casting side via the low melting point alloy layer. That is, the metal foil is diffusion-bonded to the molten metal via the low melting point alloy, and is left on the casting side while forming a metal diffusion layer there.
【００１２】[0012]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。図１は本発明に係る鋳造用中
子の斜視図、図２は同鋳造用中子の断面図であり、実施
例で示す鋳造用中子１はシリンダヘッドのポート形状を
しており、シェル砂を有機バインダで固めたコア２の外
表面にアルミ箔３が設けられ、このアルミ箔３の外表面
に低融点合金層４が形成されている。尚、コア２とアル
ミ箔３との間に耐圧層を設けるようにしてもよい。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a casting core according to the present invention, and FIG. 2 is a sectional view of the casting core. The casting core 1 shown in the embodiment has a port shape of a cylinder head, and has a shell shape. An aluminum foil 3 is provided on an outer surface of a core 2 in which sand is solidified with an organic binder, and a low melting point alloy layer 4 is formed on an outer surface of the aluminum foil 3. Incidentally, a pressure-resistant layer may be provided between the core 2 and the aluminum foil 3.
【００１３】前記低融点合金層４の組成としては、Ｚn
（亜鉛）：８５〜９６wt%、Ｓn（錫）：１０〜１５wt
%、Ｍg：１．０〜１．５wt%で、融点が４００℃以下の
ものを用いている。The composition of the low melting point alloy layer 4 is Zn
(Zinc): 85 to 96 wt%, Sn (tin): 10 to 15 wt%
%, Mg: 1.0 to 1.5 wt%, and having a melting point of 400 ° C. or less.
【００１４】上記の鋳造用中子１の製造方法の一例を図
３（ａ）〜（ｃ）に基づいて説明する。先ず、図３
（ａ）に示すアルミ箔３を用意する。このアルミ箔３の
少なくとも一面側には予め低融点合金層４が形成されて
いる。低融点合金層４の形成方法は任意であり、ＣＶ
Ｄ、ディッピング、スプレー等任意である。An example of a method for manufacturing the above-described casting core 1 will be described with reference to FIGS. First, FIG.
An aluminum foil 3 shown in (a) is prepared. A low melting point alloy layer 4 is previously formed on at least one side of the aluminum foil 3. The method of forming the low melting point alloy layer 4 is optional.
D, dipping, spraying, etc. are optional.
【００１５】次いで、上記シート状のアルミ箔３からバ
ルジ成形によってほぼポート形状に近い形に成形する。
尚、バルジ成形する際には、低融点合金層４を形成した
面が外側になるようにする。そして、袋状に成形された
アルミ箔３を、図３（ｂ）に示すように、中子成形用金
型５のキャビティ内にセットする。Next, the sheet-like aluminum foil 3 is formed by bulging into an almost port-like shape.
When performing bulge forming, the surface on which the low-melting-point alloy layer 4 is formed is located outside. Then, the bag-shaped aluminum foil 3 is set in the cavity of the core forming die 5 as shown in FIG.
【００１６】この後、図３（ｃ）に示すように、充填機
からシェル砂をキャビティ内即ち袋状に成形されたアル
ミ箔３内にブローし、加熱することでシェル砂を有機バ
インダにて固める。これにより、コア２がアルミ箔３で
被覆され、且つアルミ箔３の外側面に低融点合金層４が
形成された鋳造用中子１が得られる。Thereafter, as shown in FIG. 3 (c), the shell sand is blown from the filling machine into the cavity, that is, into the aluminum foil 3 formed into a bag shape, and heated, so that the shell sand is removed by the organic binder. Harden. Thus, a casting core 1 in which the core 2 is covered with the aluminum foil 3 and the low melting point alloy layer 4 is formed on the outer surface of the aluminum foil 3 is obtained.
【００１７】図４は別実施例に係る製造方法を説明した
図である。図３に示した実施例では、予めアルミ箔の少
なくとも一面側に低融点合金層を形成しておいたが、図
４に示す実施例では、表面に低融点合金層を形成してい
ないアルミ箔３にてコアを被覆し、これをヒータ６にて
加熱溶融せしめられている低融点合金浴７内に浸漬し、
浴から引き上げることでアルミ箔３の外側面に低融点合
金層４が形成された鋳造用中子１を得るようにしてい
る。FIG. 4 is a view for explaining a manufacturing method according to another embodiment. In the embodiment shown in FIG. 3, a low melting point alloy layer is formed in advance on at least one side of the aluminum foil, but in the embodiment shown in FIG. 4, an aluminum foil having no low melting point alloy layer on the surface is formed. The core is coated with 3 and immersed in a low-melting alloy bath 7 that has been heated and melted by a heater 6.
By pulling up from the bath, the casting core 1 having the low melting point alloy layer 4 formed on the outer surface of the aluminum foil 3 is obtained.
【００１８】そして、以上によって得られた鋳造用中子
１を、図５に示すように、シリンダヘッド鋳造用金型１
０のキャビティ内にセットし、このキャビティ内にアル
ミ合金溶湯を注湯し、冷却固化せしめた後、離型し、更
に鋳造用中子１を崩壊除去することで、図６に示すシリ
ンダヘッド１１が得られる。Then, the casting core 1 obtained as described above is used as shown in FIG.
6, and the molten aluminum alloy was poured into the cavity, cooled and solidified, released, and the casting core 1 was disintegrated and removed to obtain the cylinder head 11 shown in FIG. Is obtained.
【００１９】ところで、前記したように本発明の鋳造用
中子１にあっては、アルミ箔３の外側面に低融点合金層
４が形成されているので、キャビティ内に溶湯を充填し
た際に、溶湯の熱によって低融点合金が溶け、冷却後に
この低融点合金にてシリンダヘッド１１のポート内側面
にアルミ箔３が強固に拡散接合されて残る。By the way, as described above, in the casting core 1 of the present invention, since the low melting point alloy layer 4 is formed on the outer surface of the aluminum foil 3, when the cavity is filled with the molten metal, The low melting point alloy is melted by the heat of the molten metal, and after cooling, the aluminum foil 3 is firmly diffused and bonded to the inner surface of the port of the cylinder head 11 with the low melting point alloy.
【００２０】[0020]
【発明の効果】以上に説明したように本発明によれば、
鋳造用中子の表面をアルミ等の金属層で覆い、鋳造後に
は鋳造品側に当該金属層を残すようにしたので、コーテ
ィング組成物と溶湯とが一体になったものが成形面に差
し込む不利がなくなり、更に、金属層の外側面に低融点
合金層を形成したので、この低融点合金層が溶湯の熱で
軟化若しくは溶解し、金属層と鋳造品本体側とを強固に
接合することができる。また、金属箔としてある程度厚
みがあるものを選定すれば、金属箔自体が耐圧層として
作用するので、従来中子の使用が出来ないとされていた
高速高圧成形にも適用することが可能になる。したがっ
て、シリンダヘッドのように型抜き成形ができない形状
部を有する部材を効率よく鋳造することが可能になる。According to the present invention as described above,
Since the surface of the casting core is covered with a metal layer such as aluminum, and the metal layer is left on the casting after casting, there is a disadvantage that the integrated coating composition and molten metal are inserted into the molding surface. And the low melting point alloy layer is formed on the outer surface of the metal layer, so that the low melting point alloy layer is softened or melted by the heat of the molten metal, and the metal layer and the casting body side can be firmly joined. it can. In addition, if a metal foil having a certain thickness is selected, the metal foil itself functions as a pressure-resistant layer, so that it can be applied to high-speed and high-pressure molding where a core cannot be used conventionally. . Therefore, it is possible to efficiently cast a member such as a cylinder head having a shape portion that cannot be stamped and formed.
【図１】本発明に係る鋳造用中子の斜視図FIG. 1 is a perspective view of a casting core according to the present invention.
【図２】同鋳造用中子の断面図FIG. 2 is a sectional view of the casting core.
【図３】（ａ）〜（ｃ）は本発明に係る鋳造用中子の製
造方法を工程順に説明した図FIGS. 3A to 3C are diagrams illustrating a method of manufacturing a casting core according to the present invention in the order of steps.
【図４】別実施例に係る製造方法を説明した図FIG. 4 is a diagram illustrating a manufacturing method according to another embodiment.
【図５】本発明に係る鋳造用中子を用いて鋳造している
状態を示す図FIG. 5 is a diagram showing a state in which casting is performed using the casting core according to the present invention.
【図６】本発明に係る鋳造用中子を用いて鋳造した後の
状態を示す図FIG. 6 is a view showing a state after casting using the casting core according to the present invention.
【図７】（ａ）〜（ｃ）は従来の鋳造法を説明した図7 (a) to 7 (c) are views for explaining a conventional casting method.
１…鋳造用中子、２…コア、３…アルミ箔、４…低融点
合金層、５…中子成形用金型、６…ヒータ、７…低融点
合金浴、１０…シリンダヘッド鋳造用金型、１１…シリ
ンダヘッド。DESCRIPTION OF SYMBOLS 1 ... Casting core, 2 ... Core, 3 ... Aluminum foil, 4 ... Low melting point alloy layer, 5 ... Core forming die, 6 ... Heater, 7 ... Low melting point alloy bath, 10 ... Cylinder head casting metal Mold, 11 ... Cylinder head.
Claims (8)
めの鋳造用中子であって、この中子はコアの外側が金属
層で被覆され、この金属層の表面には低融点合金層が形
成されていることを特徴とする鋳造用中子。1. A casting core for forming a hollow portion or a concave portion in a molded body, the core being covered with a metal layer on the outside of a core, and a low melting point alloy layer on a surface of the metal layer. A core for casting, characterized in that a core is formed.
前記金属層はアルミ箔であることを特徴とする鋳造用中
子。2. The casting core according to claim 1, wherein
The core for casting, wherein the metal layer is an aluminum foil.
前記低融点合金はＺn（亜鉛）：８５〜９６wt%、 Ｓn
（錫）：１０〜１５wt%、Ｍg：１．０〜１．５wt%で、
融点が４００℃以下であることを特徴とする鋳造用中
子。3. The casting core according to claim 1, wherein
The low melting point alloy is Zn (zinc): 85 to 96 wt%, Sn
(Tin): 10 to 15 wt%, Mg: 1.0 to 1.5 wt%,
A casting core having a melting point of 400 ° C. or lower.
し、この金属箔を中子成形用金型のキャビティ内に前記
低融点合金層を形成した面が外側になるようにセット
し、次いで、金属箔で内側面が被覆されたキャビティ内
にシェル砂を吹き込んで充填し、更に加熱してシェル砂
をバインダで固めることを特徴とする鋳造用中子の製造
方法。4. A low melting point alloy layer is formed on one side of a metal foil, and the metal foil is set in a cavity of a core forming die such that the surface on which the low melting point alloy layer is formed is located outside. Next, shell sand is blown into a cavity whose inner surface is covered with a metal foil to fill the cavity, and further heated to solidify the shell sand with a binder, thereby producing a casting core.
にセットし、次いで、金属箔で内側面が被覆されたキャ
ビティ内にシェル砂を吹き込んで充填し、更に加熱して
シェル砂をバインダで固め、この後、金属箔で被覆され
た中子を金型から取り出し、低融点金属浴にディッピン
グして金属箔表面に低融点金属層を形成することを特徴
とする鋳造用中子の製造方法。5. A metal foil is set in a cavity of a core molding die, and then the shell sand is filled by blowing shell sand into a cavity whose inner surface is covered with the metal foil, and further heated to reduce the shell sand. After hardening with a binder, the core coated with the metal foil is taken out of the mold and dipped in a low melting metal bath to form a low melting metal layer on the metal foil surface. Production method.
中子の製造方法であって、前記金属箔はアルミ箔である
ことを特徴とする鋳造用中子の製造方法。6. The method of manufacturing a core for casting according to claim 4, wherein the metal foil is an aluminum foil.
子の製造方法であって、前記低融点合金はＺn（亜
鉛）：８５〜９６wt%、 Ｓn（錫）：１０〜１５wt%、
Ｍg：１．０〜１．５wt%で、融点が４００℃以下である
ことを特徴とする鋳造用中子の製造方法。7. The method for manufacturing a casting core according to claim 4, wherein the low melting point alloy is Zn (zinc): 85 to 96 wt%, and Sn (tin) is 10 to 15 wt%. ,
Mg: 1.0 to 1.5 wt%, and a melting point of 400 ° C. or less, a method for producing a core for casting.
子を用いた鋳造法であって、前記鋳造用中子を鋳型のキ
ャビティ内にセットし、次いで溶湯を充填し、冷却固化
せしめた後に離型し、この後鋳造用中子を崩壊除去する
とともに低融点合金層を介して金属箔を鋳造品側に残す
ことを特徴とする鋳造法。8. A casting method using the casting core according to claim 1, wherein the casting core is set in a cavity of a mold, and then is filled with molten metal and cooled and solidified. A casting method characterized in that the mold is released after squeezing, the core for casting is collapsed and removed, and the metal foil is left on the casting via the low melting point alloy layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21323399A JP4136208B2 (en) | 1999-07-28 | 1999-07-28 | Casting core and method for producing casting core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21323399A JP4136208B2 (en) | 1999-07-28 | 1999-07-28 | Casting core and method for producing casting core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001038450A true JP2001038450A (en) | 2001-02-13 |
| JP4136208B2 JP4136208B2 (en) | 2008-08-20 |
Family
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|---|---|---|---|
| JP21323399A Expired - Fee Related JP4136208B2 (en) | 1999-07-28 | 1999-07-28 | Casting core and method for producing casting core |
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| Country | Link |
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| JP (1) | JP4136208B2 (en) |
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| CN105364046A (en) * | 2014-08-11 | 2016-03-02 | 福特全球技术公司 | Bore bridge cooling passage |
| JP2017109246A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passages using jacketed core |
| JP2017109244A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passages using jacketed core |
| JP2017110662A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passage defined therein |
| JP2017109242A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passage defined therein |
| JP2017196666A (en) * | 2016-04-27 | 2017-11-02 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components using jacketed core |
| JP2017196664A (en) * | 2016-04-27 | 2017-11-02 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components using jacketed core |
| CN110860657A (en) * | 2019-11-05 | 2020-03-06 | 北京遥感设备研究所 | Method for forming complex inner runner mold core |
-
1999
- 1999-07-28 JP JP21323399A patent/JP4136208B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364046A (en) * | 2014-08-11 | 2016-03-02 | 福特全球技术公司 | Bore bridge cooling passage |
| JP2017109246A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passages using jacketed core |
| JP2017109244A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passages using jacketed core |
| JP2017110662A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passage defined therein |
| JP2017109242A (en) * | 2015-12-17 | 2017-06-22 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components having internal passage defined therein |
| JP7091019B2 (en) | 2015-12-17 | 2022-06-27 | ゼネラル・エレクトリック・カンパニイ | Methods and assemblies for forming components with internal passages defined inside |
| JP2017196666A (en) * | 2016-04-27 | 2017-11-02 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components using jacketed core |
| JP2017196664A (en) * | 2016-04-27 | 2017-11-02 | ゼネラル・エレクトリック・カンパニイ | Method and assembly for forming components using jacketed core |
| CN110860657A (en) * | 2019-11-05 | 2020-03-06 | 北京遥感设备研究所 | Method for forming complex inner runner mold core |
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| Publication number | Publication date |
|---|---|
| JP4136208B2 (en) | 2008-08-20 |
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