JPH0252161A - Manufacture of ceramic cast-in body - Google Patents
Manufacture of ceramic cast-in bodyInfo
- Publication number
- JPH0252161A JPH0252161A JP19960788A JP19960788A JPH0252161A JP H0252161 A JPH0252161 A JP H0252161A JP 19960788 A JP19960788 A JP 19960788A JP 19960788 A JP19960788 A JP 19960788A JP H0252161 A JPH0252161 A JP H0252161A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- resin body
- heat insulating
- foam resin
- molten metal
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000011810 insulating material Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract description 9
- 239000006260 foam Substances 0.000 abstract description 7
- 239000012778 molding material Substances 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 208000000260 Warts Diseases 0.000 description 4
- 201000010153 skin papilloma Diseases 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 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
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 241000499489 Castor canadensis Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 235000011779 Menyanthes trifoliata Nutrition 0.000 description 1
- 241001494479 Pecora Species 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はセラミックス鋳ぐるみ体の製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a ceramic cast body.
（従来技術）
本発明者らは先に、セラミックスをアルミニウムや鋳鉄
によって鋳ぐるむ際に、セラミックスが金属溶湯の熱衝
撃や冷却収縮によって破損することがなく、かつセラミ
ックスと金属とが強固に接合したセラミックス鋳ぐるみ
体を製造するため、厚さの異なる二種類の短冊状のセラ
ミックスベーパをセラミックス円筒の外周面に交互に粘
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６２−３０５
９８号公報）。(Prior Art) The present inventors have previously discovered that when ceramics are cast with aluminum or cast iron, the ceramics are not damaged by thermal shock or cooling shrinkage of molten metal, and the ceramics and metal are firmly bonded. In order to manufacture a cast ceramic body, two types of rectangular ceramic vapors with different thicknesses are alternately adhered to the outer circumferential surface of a ceramic cylinder to form an uneven intermediate layer, and molten metal is poured around the intermediate layer. proposed a method of coagulation (patent application 1986-305)
Publication No. 98).
（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、セラミックスペーパをセラミ
ックス円筒の外周面に粘着する作業は実際上は厄介であ
る。またセラミックスペーパな貼着したセラミックス円
筒の周囲に金属溶湯を鋳込む時、ベーパからガスが発生
するため、あらかじめベーパを乾燥させておく必要があ
る。更に上記方法では、セラミッ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、以て鋳込みギャビティ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 vapor, so it is necessary to dry the vapor beforehand. 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 gap.
本発明は上記のような手間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.
（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ックス鋳ぐるみ体の製の方法は、
円筒形状を成し、内周面に多数の突起を形成した発泡樹
脂体内に、セラミックス円筒体を挿嵌する工程と、前記
セラミックス円筒体を内蔵した発泡樹脂体を鋳枠内にセ
ットする工程と、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
ミックス円筒体の外周面との間に形成された空洞内に空
気１Δに近い断熱性をもつ断熱材を充填する工程と、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 the full mold method in the casting method.In other words, the method for manufacturing the ceramic cast body according to the present invention is ,
A step of inserting a ceramic cylinder into a foamed resin body having a cylindrical shape and having a large number of protrusions formed on the inner circumferential surface; and a step of setting the foamed resin body containing the ceramic cylinder 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 circumferential surface of the foamed resin body and the outer circumferential surface of the ceramic cylindrical body is insulated with air close to 1Δ. The method is characterized by comprising a step of filling a heat insulating material with properties, and a step of injecting molten metal into the foamed resin body.
（実施例）
以丁、４：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) Part 4: The 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
ックス鋳ぐるみ体の外殻部分と同一形状にされている。In the figure, (1) is 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.
なお（２）はスチロールから成る湯口である。Note that (2) is a sprue made of styrene.
また該樹脂体（１）の内周面にはイボ状突起（３）が多
数個、互いにほぼ等間隔を置いて万べんなく形成されて
いる。このような発泡樹脂体（１）内にセラミックス円
筒体（４）を挿嵌すると、該円筒体（４）は前記イボ状
突起（３）により保持され、その結果セラミックス円筒
体（４）の外周面と発泡樹脂体（１）の内周面との間に
前記イボ状突起（３）をスペーサとして互いに連通ずる
空洞（５）が形成される。Further, a large number of wart-like protrusions (3) are uniformly formed on the inner peripheral surface of the resin body (1) 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 wart-like projections (3), and as a result, the outer periphery of the ceramic cylindrical body (4) A cavity (5) is formed between the surface and the inner peripheral surface of the foamed resin body (1), communicating with each other using the wart-like projection (3) as a spacer.
（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、セラミックス円筒体
（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ットする。モして
鋳枠（６）と発泡樹脂体（１）及びセラミックス円筒体
（４）との間の空隙部ｔこ、図示し、ないホッパから粘
結剤を含まない鋳物砂等の鋳ｆｆｉ ＋４ （ｌ ｌ）
を充填する。なおこの時、発泡樹脂体（＋、）とセラミ
ックス円筒体（４）との間に形成された空洞（５）内に
空気層に近い断熱性をもつ断熱材（１２）、例えばシリ
カ粉、マグネシア粉な１ビの塗型材、けいそう土粉、ア
ルミナ粉、コ・−シライト粉等のセラミックス粉、ある
いはセラミックス短繊維等を充填する。次に発泡樹脂体
（１）の湯ＣＩ （２）を除いた鋳枠（６）の上面を耐
熱性気密シー）（１３）で密閉する。(6) is a box-shaped casting flask having a ventilation structure, and the outer periphery of the flask is provided with a box body (8) constituting a decompression chamber (7). The box (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 the surface as necessary, and the upper end of the sprue (2) is Set it so that it appears on the upper surface of the flask (6). The gap between the flask (6), the foamed resin body (1), and the ceramic cylindrical body (4) is filled with molding sand, etc. that does not contain a binder from a hopper (not shown). (l l)
Fill it with. At this time, a heat insulating material (12) having a heat insulating property similar to that of an air layer, such as silica powder or magnesia, is placed in the cavity (5) formed between the foamed resin body (+,) and the ceramic cylinder (4). Fill with powdered 1-bi coating material, ceramic powder such as diatomaceous earth powder, alumina powder, co-silite powder, or ceramic short fibers. Next, the upper surface of the flask (6) excluding the hot water CI (2) of the foamed resin body (1) is sealed with a heat-resistant airtight seal (13).
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。After that, a pressure reducing device such as a vacuum pump (not shown) is operated to exhaust the air inside the flask (6) through the pipe (9) and the pressure reducing chamber (7), thereby reducing the air inside the flask (6). to a negative pressure state.
これにより′＃！Ｉ＃ｊ材を含まない＃型材（１１）は
、鋳枠（６）内にて発泡樹脂体（１）及びセラミックス
円筒体（４）を内蔵したまま造型され鋳型を形成する。Due to this '#! The #-type material (11) that does not contain the I#j material is molded in the flask (6) with the foamed resin body (1) and the ceramic cylindrical body (4) contained therein to form a mold.
この状態で、アルミ合金の溶湯を湯口（２） Ｊ：端よ
り注湯すると、発泡樹脂体（１）は燃焼気化し、これに
よって生じた空洞部に溶湯が置換的に充填され・セラミ
ックスの鋳ぐるみ体が製造される。In this state, when molten aluminum alloy is poured from the end of the sprue (2), the foamed resin body (1) is combusted and vaporized, and the resulting cavity is filled with the molten metal in an displacement manner, and the ceramics are cast. A gurumi body is manufactured.
なおこの時、発泡Ｗ座体（１）とセラミックスＰｉ体（
４）との間の空洞（５）内に充填されていた断熱材（１
２）が断熱効果を発揮して、セラミックス円筒体（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、セラミックス
円筒体（４）の外周面に存在する前記断熱材（１２）が
内方へたわんで該圧縮応力を吸収するため、セラミック
ス円筒体（４）の破損が訪１１：、される。一方、発泡
効座体（１）のイボ状突起（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ックス円
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
れによってセラミックス円筒体（４）とアルミ合金とは
固く接合された状態になる。At this time, the foamed W seat body (1) and the ceramic Pi body (
The insulation material (1) filled in the cavity (5) between the
2) exhibits a heat insulating effect, and the ceramic cylinder (4)
Thermal shock to is alleviated. The molten metal eventually cools and solidifies and contracts, generating internal compressive stress, but the heat insulating material (12) present on the outer peripheral surface of the ceramic cylinder (4) bends inward to absorb the compressive stress. As a result, the ceramic cylindrical body (4) is damaged. On the other hand, the aluminum alloy substituted into the wart-like protrusions (3) of the foamed seat body (1) applies its internal compressive stress directly to the ceramic cylinder (4) to tighten it. This tightening force remains even after the aluminum alloy is completely solidified and cooled, and as a result, 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）内よりセラミックスハ梼
ぐるみ体を取出す訳であるが、この時セラミックス円筒
体（４）とこれを鋳ぐるんでい乙アルミ合金との接合部
に存在する断熱材（１２）は、製品の形状により、一部
は除去されるが、−部は内部に曳る。After the predetermined time has passed, the operation of the pressure reducing device is stopped and the flask (6) is removed.
When the negative pressure inside the mold material (11) 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 cylindrical body is removed from the casting flask (6). Depending on the shape of the product, a portion of the heat insulating material (12) present at the joint is removed, but the negative portion is pulled inside.
なお実施例では、セラミッ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.
また実施例では、注湯１こ先立って鋳枠内を負圧状態（
こしているが、ガス抜きの良い状況であれば必ずしも負
圧状態にする必要はない。In addition, in the example, the inside of the flask was kept under negative pressure (
However, if the conditions allow for good degassing, it is not necessarily necessary to create a negative pressure state.
（発明の効果）
以上の説明から明らかなようンこ、本発明はセラミック
スの鋳ぐるみ体を製造するに当って、セラミックス円筒
体の外周面に粘結剤を含まない鋳型材から成る緩当層を
形成し、以て鋳ぐるみ金属注湯時のセラミックス円筒体
に対する熱衝γや該金属冷却時の内部圧縮応力を緩和・
吸収すると共（こ１セラミッ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、円筒形状を成し、内周面に多数の突
起を形成した発泡樹脂体内にセラミックス円筒体を挿嵌
し、以て発泡樹脂体の内周面とセラミックス円筒体の外
周面との間に前記突起をスペーサとして空洞を形成し、
ここに空気層に近い断熱性をもつ断熱材を充填して緩衝
層となしたものである。(Effects of the Invention) As is clear from the above description, the present invention provides a flexible layer made of a molding material that does not contain a binder on the outer peripheral surface of a ceramic cylindrical body in manufacturing a ceramic cast body. This reduces the thermal shock γ to the ceramic cylinder during pouring of cast metal and the internal compressive stress during cooling of the metal.
The purpose is to firmly bond the ceramic cylindrical body and the cast metal.In order to achieve this purpose, the ceramic cylinder is shaped like a cylinder and has many protrusions on its inner circumferential surface. inserting a ceramic cylindrical body into the foamed resin body, thereby forming a cavity between the inner peripheral surface of the foamed resin body and the outer peripheral surface of the ceramic cylindrical body using the protrusion as a spacer;
This is filled with a heat insulating material that has a heat insulating property similar to that of an air layer to form a buffer layer.
このような本発明によれば、セラミックス、ｖＪぐるみ
体の製造工程において、セラミックス円筒体を内蔵した
発泡樹脂体を坊枠内；・−ヒブ）して該祷枠内に鋳型材
を充填する際、前記空洞内へ断熱材が充填されるから、
セラミックス円筒の外周面ニセラミックスベーバを貼着
する厄介な作業が不要になる。なお前記断熱材は空気層
に近い断熱性をもつため、型ばらしの際その一部が製品
内部に也留しても、製品全体の断熱効果にムラが生じる
ことはない。According to the present invention, in the manufacturing process of ceramic vJ gurumi bodies, a foamed resin body containing a ceramic cylindrical body is placed in a frame, and the mold material is filled in the frame. At this time, the cavity is filled with a heat insulating material,
The troublesome work of attaching a ceramic beaver to the outer peripheral surface of a ceramic cylinder becomes unnecessary. Since the heat insulating material has a heat insulating property similar to that of an air layer, even if a portion of the heat insulating material remains inside the product during demolding, the heat insulating effect of the entire product will not be uneven.
また前記発泡樹脂体は、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
ックス鋳ぐるみ体の外殻部分が自動的に鋳造され、従っ
て合せ鋳型を造型してこれを型合せし、鋳込みキャピテ
イを形成する手間が省ける。Furthermore, the foamed resin body is burned out when molten metal is injected into it and is replaced by the molten metal, so the outer shell of the ceramic cast body is automatically cast, and therefore a matching mold is formed. This saves the trouble of aligning the molds 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ックス
円筒体を挿嵌した状態を示す外形図、第３図は本発明方
法に用いる装置の完断側面図、第４図及び第５図は第１
図及び第２図の各モ面図である。
（１）二発泡樹脂体 （３）：突 起（４） ：
セラミックス円ｍ体（５） ：空洞（６）：鋳 枠
（１１）：鋳型打子２囚
羊５囚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 cylindrical body inserted into the foamed resin body, and FIG. 3 is an external view of a foamed resin body. FIGS. 4 and 5 are complete side views of the apparatus used in the method of the present invention.
FIG. 3 is a side view of each of FIGS. (1) Double foam resin body (3): Protrusion (4):
Ceramic circular body (5): Cavity (6): Casting flask (11): Mold hammer 2 prisoners 5 sheep
Claims (1)
発泡樹脂体（１）内に、セラミックス円筒体（４）を挿
嵌する工程と、前記セラミックス円筒体（４）を内蔵し
た発泡樹脂体（１）を鋳枠（６）内にセットする工程と
、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
記セラミックス円筒体（４）の外周面との間に形成され
た空洞（５）内に空気層に近い断熱性をもつ断熱材（１
２）を充填する工程と、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ッ
クス鋳ぐるみ体の製造方法。A process of inserting a ceramic cylindrical body (4) into a foamed resin body (1) having a cylindrical shape and having a large number of protrusions (3) formed on its inner peripheral surface, and incorporating the ceramic cylindrical body (4). A step of setting the foamed resin body (1) in a flask (6), and a mold material (11) containing no binder in the flask (6).
and fill the cavity (5) between the inner circumferential surface of the foamed resin body (1) and the outer circumferential surface of the ceramic cylinder (4) with a heat insulating material having a heat insulating property close to that of an air layer. (1
2) and a step of injecting molten metal into the foamed resin body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63199607A JP2553918B2 (en) | 1988-08-10 | 1988-08-10 | Method for manufacturing cast ceramic body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63199607A JP2553918B2 (en) | 1988-08-10 | 1988-08-10 | Method for manufacturing cast ceramic body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0252161A true JPH0252161A (en) | 1990-02-21 |
| JP2553918B2 JP2553918B2 (en) | 1996-11-13 |
Family
ID=16410675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63199607A Expired - Fee Related JP2553918B2 (en) | 1988-08-10 | 1988-08-10 | Method for manufacturing cast ceramic body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553918B2 (en) |
-
1988
- 1988-08-10 JP JP63199607A patent/JP2553918B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2553918B2 (en) | 1996-11-13 |
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| LAPS | Cancellation because of no payment of annual fees |