JPH0472632B2 - - Google Patents
Info
- Publication number
- JPH0472632B2 JPH0472632B2 JP16076487A JP16076487A JPH0472632B2 JP H0472632 B2 JPH0472632 B2 JP H0472632B2 JP 16076487 A JP16076487 A JP 16076487A JP 16076487 A JP16076487 A JP 16076487A JP H0472632 B2 JPH0472632 B2 JP H0472632B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- foamed resin
- flask
- resin body
- cast
- 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
- 239000000919 ceramic Substances 0.000 claims description 49
- 239000011347 resin Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 239000012778 molding material Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はセラミツクス鋳ぐるみ体の製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing a ceramic cast body.
（従来技術）
本発明者らは先に、セラミツクスをアルミニウ
ムや鋳鉄によつて鋳ぐるむ際に、セラミツクスが
金属溶湯の熱衝撃や冷却収縮によつて破損するこ
とがなく、かつセラミツクスと金属とが強固に接
合したセラミツクス鋳ぐるみ体を製造するため、
厚さの異なる二種類の短冊状のセラミツクスペー
パをセラミツクス円筒の外周面に交互に貼着して
凹凸状の中間層を形成し、その周囲に金属溶湯を
鋳込み凝固させる方法を提案した（特願昭62−
30598号公報）。(Prior Art) The present inventors have previously discovered that when ceramics are cast with aluminum or cast iron, the ceramics will not be damaged by thermal shock or cooling shrinkage of molten metal, and the ceramics and metal will not be damaged. In order to manufacture ceramic cast bodies with strong bonding,
We proposed a method in which two types of rectangular ceramic paper with different thicknesses are alternately attached to the outer circumferential surface of a ceramic cylinder to form an uneven intermediate layer, and molten metal is poured around the intermediate layer and solidified (patent application). Showa 62-
Publication No. 30598).
（発明が解決しようとする問題点）
しかし上記方法において、セラミツクスペーパ
をセラミツクス円筒の外周面に貼着する作業は実
際上は厄介である。またセラミツクスペーパを貼
着したセラミツクス円筒の周囲に金属溶湯を鋳込
む時、ペーパからガスが発生するため、あらかじ
めペーパを乾燥させておく必要がある。更に前記
セラミツクスペーパから成る中間層は金属溶湯の
鋳込み凝固後も残存するため、この部分を冷却水
の通過、加熱電線の敷設溝等として利用したい場
合に不都合である。更に上記方法では、セラミツ
クス鋳ぐるみ体の外殻部分を形成するため、合せ
鋳型を造型してこれを型合せし、以て鋳込みキヤ
ビテイを形成する必要がある。(Problems to be Solved by the Invention) However, in the above method, the work of adhering the ceramic paper to the outer peripheral surface of the ceramic cylinder is actually troublesome. Furthermore, when pouring molten metal around a ceramic cylinder to which ceramic paper is attached, gas is generated from the paper, so it is necessary to dry the paper beforehand. Furthermore, since the intermediate layer made of the ceramic paper remains even after the molten metal is cast and solidified, this is inconvenient when it is desired to use this portion as a passage for cooling water, a groove for laying heating wires, etc. Furthermore, in the above method, in order to form the outer shell portion of the ceramic cast body, it is necessary to form a matching mold and fit the molds together to form a casting cavity.
本発明は上記のような手間や不都合を回避する
ためになされたものである。 The present invention has been made in order to avoid the above-mentioned troubles and inconveniences.
（問題点を解決するための手段）
本発明は上記の目的を達成するため、鋳造法に
おけるフルモールド法を利用することを要旨とし
ている。すなわち本発明に係るセラミツクス鋳ぐ
るみ体の製造方法は、円筒形状を成し、内周面に
軸線方向に沿う突起を複数個、互いにほぼ等間隔
で形成した発泡樹脂体内に、セラミツクス円筒体
を挿嵌する工程と、前記セラミツクス円筒体を内
蔵した発泡樹脂体を鋳枠内にセツトする工程と、
前記鋳枠内に粘結剤を含まない鋳型材を充填する
と共に、前記発泡樹脂体の内周面と前記セラミツ
クス円筒体の外周面との間に形成された空洞内に
粘結剤を含まない鋳型材を充填する工程と、前記
鋳枠内を負圧状態にする工程と、前記発泡樹脂体
に金属溶湯を注入する工程とから成ることを特徴
としている。(Means for Solving the Problems) In order to achieve the above object, the gist of the present invention is to utilize a full mold method in the casting method. That is, the method for producing a ceramic cast body according to the present invention involves inserting a ceramic cylinder into a foamed resin body that has a cylindrical shape and has a plurality of protrusions along the axial direction formed on the inner peripheral surface at approximately equal intervals. a step of fitting, and a step of setting the foamed resin body containing the ceramic cylindrical body in a casting flask;
The flask is filled with a molding material that does not contain a binder, and the cavity formed between the inner peripheral surface of the foamed resin body and the outer peripheral surface of the ceramic cylinder does not contain a binder. The method is characterized by comprising a step of filling mold material, a step of bringing the inside of the flask into a negative pressure state, and a step of pouring molten metal into the foamed resin body.
（実施例）
以下、本発明を実施例に基づいて詳細に説明す
る。第１図ないし第３図は本発明の製造工程を示
す説明図、第４図及び第５図は第１図及び第２図
の各平面図である。(Examples) Hereinafter, the present invention will be explained in detail based on Examples. 1 to 3 are explanatory diagrams showing the manufacturing process of the present invention, and FIGS. 4 and 5 are plan views of FIGS. 1 and 2, respectively.
図において、１はスチロールから成る円筒状の
発泡樹脂体であり、該樹脂体１は、得ようとする
セラミツクス鋳ぐるみ体の外殻部分と同一形状に
されている。なお２はスチロールから成る湯口で
ある。 In the figure, reference numeral 1 denotes a cylindrical foamed resin body made of styrene, and the resin body 1 has the same shape as the outer shell of the ceramic cast body to be obtained. Note that 2 is a sprue made of styrene.
また該樹脂体１の内周面には軸線方向に沿う突
起３が複数個、互いにほぼ等間隔を置いて形成さ
れている。このような発泡樹脂体１内にセラミツ
クス円筒体４を挿嵌すると、該円筒体４は前記突
起３により保持され、その結果セラミツクス円筒
体４の外周面と発泡樹脂体１の内周面との間に前
記突起３により複数個に仕切られた空洞５が形成
される。 Further, a plurality of protrusions 3 are formed on the inner circumferential surface of the resin body 1 along the axial direction and spaced from each other at approximately equal intervals. When the ceramic cylindrical body 4 is inserted into such a foamed resin body 1, the cylindrical body 4 is held by the projection 3, and as a result, the outer peripheral surface of the ceramic cylindrical body 4 and the inner peripheral surface of the foamed resin body 1 are A plurality of cavities 5 partitioned by the projections 3 are formed in between.
６は通気構造を有する箱状鋳枠であり、その外
周には減圧室７を構成する箱体８を備えている。
箱体８には、一端が減圧室７と連通し他端が図示
しない真空ポンプと接続された管路９が設けられ
ている。このような鋳枠６内に、セラミツクス円
筒体４を内蔵した発泡樹脂体１を、必要に応じて
その表面に塗型を施した上、その湯口２の上端が
鋳枠６の上面に現出するようにしてセツトする。
そして鋳枠６と発泡樹脂体１及びセラミツクス円
筒体４との間の空〓部に、図示しないホツパから
粘結剤を含まない鋳物砂等の鋳型材１１を充填す
る。なおこの時、発泡樹脂体１とセラミツクス円
筒体４との間に形成された空洞５内にも鋳型材１
１が充填される。次に発泡樹脂体１の湯口２を除
いた鋳枠６の上面を耐熱性気密シート１２で密閉
する。 Reference numeral 6 denotes a box-shaped casting flask having a ventilation structure, and a box body 8 constituting a decompression chamber 7 is provided on the outer periphery of the flask.
The box body 8 is provided with a conduit 9 that communicates with the decompression chamber 7 at one end and is connected to a vacuum pump (not shown) at the other end. In such a casting flask 6, the foamed resin body 1 containing the ceramic cylinder 4 is coated on its surface as necessary, and the upper end of the sprue 2 is exposed on the upper surface of the flask 6. Set it as follows.
The empty space between the flask 6, the foamed resin body 1, and the ceramic cylindrical body 4 is filled with a molding material 11 such as molding sand containing no binder from a hopper (not shown). At this time, the mold material 1 is also placed in the cavity 5 formed between the foamed resin body 1 and the ceramic cylindrical body 4.
1 is filled. Next, the upper surface of the flask 6 excluding the sprue 2 of the foamed resin body 1 is sealed with a heat-resistant airtight sheet 12.
しかる後、図示しない真空ポンプ等の減圧装置
を作動させ、管路９、減圧室７を介して鋳枠６内
の空気を排気し、以て該鋳枠６内を負圧状態にす
る。これにより粘結材を含まない鋳型材１１は、
鋳枠６内にて発泡樹脂体１及びセラミツクス円筒
体４を内蔵したまま造型され鋳型を形成する。 Thereafter, a pressure reducing device such as a vacuum pump (not shown) is operated to exhaust the air in the flask 6 through the pipe line 9 and the pressure reducing chamber 7, thereby bringing the inside of the flask 6 into a negative pressure state. As a result, the mold material 11 containing no caking material is
The foamed resin body 1 and the ceramic cylindrical body 4 are molded inside the flask 6 to form a mold.
この状態で、アルミ合金の溶湯を湯口２上端よ
り注湯すると、発泡樹脂体１は燃焼気化し、これ
によつて生じた空胴部に溶湯が置換的に充填さ
れ、セラミツクスの鋳ぐるみ体が製造される。な
おこの時、発泡樹脂体１のセラミツクス円筒体４
との間の空洞５内に充填されていた鋳型材１１が
断熱効果を発揮して、セラミツクス円筒体４への
熱衝撃が緩和される。溶湯はやがて冷却凝固して
収縮し、この時内部圧縮応力が発生するが、セラ
ミツクス円筒体４の外周面に存在する前記鋳型材
１１が内方へたわんで該圧縮応力を吸収するた
め、セラミツクス円筒体４の破損が防止される。
一方、発泡樹脂体１の突起３部分に置換的に充填
されたアルミ合金は、その内部圧縮応力をセラミ
ツクス円筒体４に直接に作用させてこれを締付け
る。この締付力はアルミ合金が完全に凝固冷却し
た後も残留し、これによつてセラミツクス円筒体
４とアルミ合金とは固く接合された状態になる。 In this state, when molten aluminum alloy is poured from the upper end of the sprue 2, the foamed resin body 1 burns and vaporizes, and the resulting cavity is filled with the molten metal, and the ceramic cast body is formed. Manufactured. At this time, the ceramic cylindrical body 4 of the foamed resin body 1
The mold material 11 filled in the cavity 5 between the two exhibits a heat insulating effect, and the thermal shock to the ceramic cylinder 4 is alleviated. The molten metal eventually cools and solidifies and contracts, generating internal compressive stress. However, the mold material 11 present on the outer circumferential surface of the ceramic cylinder 4 bends inward to absorb the compressive stress. Damage to the body 4 is prevented.
On the other hand, the aluminum alloy substituted into the projection 3 portion of the foamed resin body 1 applies its internal compressive stress directly to the ceramic cylindrical body 4 to tighten it. This tightening force remains even after the aluminum alloy is completely solidified and cooled, so that the ceramic cylindrical body 4 and the aluminum alloy are firmly joined.
所定時間経過後、減圧装置の作動を停止して鋳
枠６内の負圧状態を解除すると、鋳型材１１の各
粒子の移動が自由になり、鋳型が崩壊する。しか
る後、鋳型材１１を排除して鋳枠６内よりセラミ
ツクスの鋳ぐるみ体を取出す訳であるが、この時
セラミツクス円筒体４とこれを鋳ぐるんでいるア
ルミ合金との接合部に存在する鋳型材１１は、粘
結剤を含んでいないため、容易に除去される。 After a predetermined period of time has elapsed, when the operation of the pressure reducing device is stopped and the negative pressure state in the flask 6 is released, each particle of the mold material 11 becomes free to move and the mold collapses. After that, the mold material 11 is removed and the ceramic cast body is taken out from within the flask 6. At this time, the mold existing at the joint between the ceramic cylinder body 4 and the aluminum alloy in which it is cast is removed. Since the material 11 does not contain a binder, it is easily removed.
なお実施例では、セラミツクス円筒体をアルミ
合金で鋳ぐるむ場合を示したが、鋳ぐるむ材料と
しては鋳鉄その他の鉄系のものでもよい。 In the embodiment, the ceramic cylindrical body is cast with an aluminum alloy, but the material to be cast may be cast iron or other iron-based materials.
（発明の効果）
以上の説明から明らかなように、本発明はセラ
ミツクスの鋳ぐるみ体を製造するに当つて、セラ
ミツクス円筒体の外周面に粘結剤を含まない鋳型
材から成る緩衝層を該円筒体の軸線方向に沿つて
断続的に形成し、以て鋳ぐるみ金属注湯時のセラ
ミツクス円筒体に対する熱衝撃や該金属冷却時の
内部圧縮応力を緩和・吸収すると共に、セラミツ
クス円筒体と鋳ぐるみ金属とを強固に接合させん
とするものである。そしてこの目的を達成するた
め、セラミツクス円筒体の周囲を鋳ぐるみ体の外
殻部分と同一形状の発泡樹脂体で包囲すると共
に、両者の接合部にセラミツクス円筒体の軸線方
向に沿う複数の空洞を設け、ここに粘結剤を含ま
ない鋳型材を充填するようにしたものである。(Effects of the Invention) As is clear from the above description, the present invention applies a buffer layer made of a molding material that does not contain a binder to the outer peripheral surface of a ceramic cylindrical body when manufacturing a ceramic cast body. It is formed intermittently along the axial direction of the cylindrical body, thereby mitigating and absorbing the thermal shock to the ceramic cylindrical body during pouring of cast metal and the internal compressive stress during cooling of the metal, as well as providing a bond between the ceramic cylindrical body and the casting. This is intended to provide a strong bond with the surrounding metal. In order to achieve this purpose, the periphery of the ceramic cylinder is surrounded by a foamed resin body having the same shape as the outer shell of the cast body, and a plurality of cavities are formed along the axial direction of the ceramic cylinder at the joint between the two. A molding material containing no binder is filled in the molding material.
このような本発明によれば、セラミツクス鋳ぐ
るみ体の製造工程において、セラミツクス円筒体
を内蔵した発泡樹脂体を鋳枠内にセツトして該鋳
枠内に鋳型材を充填する際、前記空洞内へも同時
に鋳型材が充填されるから、セラミツクス円筒の
外周面にセラミツクスペーパを貼着する厄介な作
業が不要になる。また、このようにして形成され
た緩衝層は粘結剤を含まない鋳型材から成つてい
るため、鋳ぐるみ金属注湯時に該緩衝層からガス
が発生することがないと共に、鋳込み金属の凝固
後に製品と鋳型材とを分離する際にも該緩衝層を
容易に除去でき、従つてこの部分を冷却水の通路
や加熱電線の敷設溝として利用する上で好都合で
ある。 According to the present invention, in the manufacturing process of a ceramic cast body, when a foamed resin body containing a ceramic cylindrical body is set in a flask and the flask is filled with mold material, the inside of the cavity is Since the mold material is also filled at the same time, the troublesome work of attaching ceramic paper to the outer peripheral surface of the ceramic cylinder becomes unnecessary. In addition, since the buffer layer formed in this way is made of mold material that does not contain a binder, gas will not be generated from the buffer layer when pouring metal into the casting, and after solidification of the cast metal. The buffer layer can be easily removed when the product and the mold material are separated, and it is therefore convenient to use this portion as a passage for cooling water or a groove for laying heating electric wires.
更に前記発泡樹脂体は、これに金属溶湯が注入
されることにより焼失して該金属溶湯に置換され
るため、セラミツクス鋳ぐるみ体の外殻部分が自
動的に鋳造され、従つて合せ鋳型を造型してこれ
を型合せし、鋳込みキヤビテイを形成する手間が
省ける。 Further, the foamed resin body is burned out by injecting molten metal into it and replaced by the molten metal, so that the outer shell of the ceramic cast body is automatically cast, and a matching mold is formed. This eliminates the need for molding and forming a casting cavity.
図面は本発明の一実施例を示すものであり、第
１図は発泡樹脂体の外形図、第２図は発泡樹脂体
にセラミツクス円筒体を挿嵌した状態を示す外形
図、第３図は本発明方法に用いる装置の従断側面
図、第４図及び第５図は第１図及び第２図の各平
面図である。
１：発泡樹脂体、３：突起、４：セラミツクス
円筒体、５：空胴、６：鋳枠、１１：鋳型材。
The drawings show one embodiment of the present invention; FIG. 1 is an external view of a foamed resin body, FIG. 2 is an external view of a ceramic cylinder inserted into the foamed resin body, and FIG. 3 is an external view of a foamed resin body. 4 and 5 are plan views of the apparatus used in the method of the present invention, respectively, as shown in FIGS. 1 and 2. 1: Foamed resin body, 3: Protrusion, 4: Ceramic cylindrical body, 5: Cavity, 6: Cast flask, 11: Mold material.
Claims (1)
起３を複数個、互いにほぼ等間隔で形成した発泡
樹脂体１内に、セラミツクス円筒体４を挿嵌する
工程と、前記セラミツクス円筒体４を内蔵した発
泡樹脂体１を鋳枠６内にセツトする工程と、前記
鋳枠６内に粘結剤を含まない鋳型材１１を充填す
ると共に、前記発泡樹脂体１の内周面と前記セラ
ミツクス円筒体４の外周面との間に形成された空
洞５内に粘結剤を含まない鋳型材１１を充填する
工程と、前記鋳枠６内を負圧状態にする工程と、
前記発泡樹脂体１に金属溶湯を注入する工程とか
ら成ることを特徴とするセラミツクス鋳ぐるみ体
の製造方法。1. A step of inserting a ceramic cylindrical body 4 into a foamed resin body 1 which has a cylindrical shape and has a plurality of protrusions 3 extending along the axial direction on its inner circumferential surface and are formed at approximately equal intervals from each other; 4 is set in the flask 6, and the mold material 11 containing no binder is filled into the flask 6, and the inner circumferential surface of the foamed resin body 1 and the a step of filling a mold material 11 that does not contain a binder into the cavity 5 formed between the outer circumferential surface of the ceramic cylindrical body 4; and a step of bringing the inside of the flask 6 into a negative pressure state;
A method for manufacturing a ceramic cast body, comprising the step of injecting molten metal into the foamed resin body 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16076487A JPS645655A (en) | 1987-06-26 | 1987-06-26 | Production of ceramic cast-in body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16076487A JPS645655A (en) | 1987-06-26 | 1987-06-26 | Production of ceramic cast-in body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS645655A JPS645655A (en) | 1989-01-10 |
| JPH0472632B2 true JPH0472632B2 (en) | 1992-11-18 |
Family
ID=15721953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16076487A Granted JPS645655A (en) | 1987-06-26 | 1987-06-26 | Production of ceramic cast-in body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS645655A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525921A (en) * | 2014-12-15 | 2015-04-22 | 贵州安吉航空精密铸造有限责任公司 | Process for guaranteeing casting feeding in place during melting casting process |
-
1987
- 1987-06-26 JP JP16076487A patent/JPS645655A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS645655A (en) | 1989-01-10 |
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