JPS6376737A - Core composition - Google Patents
Core compositionInfo
- Publication number
- JPS6376737A JPS6376737A JP22267386A JP22267386A JPS6376737A JP S6376737 A JPS6376737 A JP S6376737A JP 22267386 A JP22267386 A JP 22267386A JP 22267386 A JP22267386 A JP 22267386A JP S6376737 A JPS6376737 A JP S6376737A
- Authority
- JP
- Japan
- Prior art keywords
- core
- casting
- molding
- water
- magnesium silicate
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 9
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 9
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 18
- 238000000465 moulding Methods 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 2
- 230000002706 hydrostatic effect Effects 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 230000009974 thixotropic effect Effects 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 27
- ZADYMNAVLSWLEQ-UHFFFAOYSA-N magnesium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[Mg+2].[Si+4] ZADYMNAVLSWLEQ-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 238000009694 cold isostatic pressing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000007582 slurry-cast process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 ［発明の目的コ （産業上の利用分野） 本発明は鋳造用の中子組成物に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a core composition for casting.
本発明は亜鉛合金、マグネシウム合金、アルミニウム合
金等のｖｊ造出用中子利用できる。The present invention can be used for VJ production cores made of zinc alloy, magnesium alloy, aluminum alloy, etc.
（従来技術）
従来技術として、例えば特開昭４８−２５２９３号明細
書には、ケイ砂又はジルコサンドを熱硬化性樹脂により
１＆覆し、ブロー成形法にて成形・熱硬化したものにア
ルミナ・シリケート又はりん酸アルミニウム等無機バイ
ンダーを含浸し、熱処Ｉ！ｌ！（樹脂の熱分解のため処
理）を施し、中子を製作づる技術がσｉ１示されている
。(Prior art) As a prior art, for example, Japanese Patent Application Laid-Open No. 48-25293 discloses that silica sand or zirco sand is coated with a thermosetting resin, molded and thermoset using a blow molding method, and then alumina silicate or Impregnated with an inorganic binder such as aluminum phosphate and heat treated I! l! (treatment for thermal decomposition of resin) to produce a core is shown in σi1.
（発明が解決しようとする問題点）
上記の従来法により製造される中子は、クイ砂又はジル
コサンド等を使用しているため、鋳肌が荒れたり、砂を
鋳包んでしまう可能性があること、鋳造後に砂残りを防
止するための処理を必要とづること、砂残りの有無を検
査する装置の設置のための費用を必要とし、また検査工
数が増加する結果となり製品コストが高価になることが
避けられないなど、多くの問題があった。(Problems to be solved by the invention) Since the core manufactured by the above-mentioned conventional method uses clay sand or zirco sand, there is a possibility that the casting surface may become rough or sand may be engulfed in the casting. In addition, processing is required to prevent sand residue after casting, and the cost of installing a device to inspect the presence of sand residue is required, and the number of inspection steps increases, resulting in high product costs. There were many problems, such as the inevitable.
本発明は、上記問題点のない、除去を容易、確実に行う
ことができ、安価に製造可能な鋳造用の中子組成物を提
供することを［ｌ的とするものである。An object of the present invention is to provide a casting core composition that does not have the above-mentioned problems, can be easily and reliably removed, and can be manufactured at low cost.
Ｌ発明の構成］
（問題点を解決するための手段〉
本発明の中子組成物は、少なくとも含水マグネシウム珪
酸塩を含み吸水により１ヱ変性を示すことを特徴とする
ものである。Structure of the Invention] (Means for Solving the Problems) The core composition of the present invention is characterized in that it contains at least a hydrated magnesium silicate and exhibits 1) modification upon water absorption.
本発明による中子組成物は、含水マグネシウム珪Ｍｌｕ
（天然鉱物であってセビオライトとして産出）に、場合
によっては（例えば、ｉ原材料の融点が８３０℃以下の
とき）ｇ！々の耐熱付焼結無代原料（１１００℃以下で
焼結しないもの、例えば、アルミナ（△１ｚｏｘ）、シ
リカ（ＳｌＯｚ）、ジルコニア（ＺｒＯｚ）、炭化珪素
（ＳｉＣ）Ｓセラミックス粉末）を混合する。使用原料
はすべて粒径１００μｍ以下とする。The core composition according to the present invention comprises hydrated magnesium silicon Mlu
(It is a natural mineral and is produced as Seviolite), and in some cases (for example, when the melting point of the i raw material is 830°C or lower) g! Various heat-resistant sinterless raw materials (those that do not sinter at temperatures below 1100° C., such as alumina (Δ1zox), silica (SlOz), zirconia (ZrOz), and silicon carbide (SiC) S ceramic powder) are mixed. All raw materials used have a particle size of 100 μm or less.
混合比は溶場温度により異なり、ジルコニウム合金、マ
グネシウム合金の場合には、含水マグネシウム珪酸塩と
耐熱難焼結材料比を１００：Ｏ〜７０ ： ３０ （重
量比）とし、アルミニウム合金の場合には１００：Ｏ〜
５０：５０とする。ここで性急を要することは、含水マ
グネシウム珪酸塩が５０重間％以下になると中子の水崩
壊性が茗しく劣化することである。The mixing ratio varies depending on the melt field temperature, and in the case of zirconium alloys and magnesium alloys, the ratio of hydrated magnesium silicate to heat-resistant and difficult-to-sinter material is 100:O to 70:30 (weight ratio), and in the case of aluminum alloys, it is 100:O~
The ratio shall be 50:50. What is urgent here is that if the hydrated magnesium silicate is less than 50% by weight, the water disintegrability of the core deteriorates slowly.
これを、プレス成形後、乾燥（１００℃〜５００℃）又
は泥漿鋳造後充分乾燥させｖｉ巣の発生を防止する。次
いで脱水し、成形体を（ｊする。特により高い強度を要
求される場合は更に冷間静水圧加圧（Ｃ，１，Ｐ、）を
行う。鋳造温度８５０℃以下で鋳造後、鋳物を含水する
と、中７−１よ原材料として使用したマグネシウム］↑
酸塩の性質により吸水し徐々に崩壊し、ついにはコロイ
ド状となりｌ（，１粘する。このゾル状の粘性流体は揺
変竹であり、高水圧にて容易に流動、除去できる。くこ
こで揺変性とは単にかきまぜたり振りまぜたりすること
によってゲルが流動性のゾルに変わり、これを放置して
おくと再びゲルに戻る性質をいう。〉。流動、除去のた
め１１）水圧にて前哨を促進させるとともに中子材料を
流出させるが、水崩壊性をさらに良好にするため膨、同
性のあるモンモリロナイト鉱物やカルシア（Ｃａｂ）等
を助剤として添加することも効果がある。本発明の中子
組成物の場合には砂を使用しているため、従来のような
砂残りの心配がない。After press molding, this is dried (at 100° C. to 500° C.) or thoroughly dried after slurry casting to prevent the occurrence of vibrator holes. The molded body is then dehydrated and subjected to cold isostatic pressing (C, 1, P,) when particularly high strength is required. After casting at a casting temperature of 850°C or lower, the casting is When hydrated, the magnesium used as a raw material in 7-1]↑
Due to the nature of the acid salt, it absorbs water and gradually disintegrates, eventually becoming a colloid and having a viscosity of 1 (1). This sol-like viscous fluid is thixomorphic and can be easily fluidized and removed under high water pressure. Thixotropy refers to the property of a gel turning into a fluid sol by simply stirring or shaking it, and returning to a gel again if it is left alone. 11) For fluidization and removal 11) Using water pressure Although it promotes outpost formation and allows the core material to flow out, it is also effective to add montmorillonite minerals, calcia (Cab), etc., which have swelling and homogeneity, as auxiliaries to further improve water disintegration properties. In the case of the core composition of the present invention, since sand is used, there is no need to worry about sand residue as in the conventional case.
（実施例） 以下本発明を実施例に基づいて説明する。(Example) The present invention will be explained below based on examples.
第１表に示すように含水マグネシウム珪酸塩と耐熱難焼
結無礪粉末材料［アルミナ（Δ１２０３＞、シリカ（Ｓ
ｉＯｚ）、ジルレフニア（Ｚｒ０２）、炭化珪素（Ｓ
ｉ Ｃ）等既知のセラミック粉末］との混合比を１００
：０１９０：１０．８０ ： ２０．７０：３０．６０
：４０．５０：５０．４０：６０にいろいろ変えて配合
混合した。原料は粒（￥１００１００ｔ１．下のものを
使用した。成形は乾式プレス成形により行い２００℃で
約３０分間乾燥した。As shown in Table 1, hydrated magnesium silicate and heat-resistant, hard-to-sinter, solid powder materials [alumina (Δ1203>, silica (S
iOz), Zirrefnia (Zr02), silicon carbide (S
i C) and other known ceramic powders] at a mixing ratio of 100
:0190:10.80 :20.70:30.60
:40.50:50.40:60 were mixed at various ratios. The raw material used was grains (less than ¥100,100 t1.) The molding was done by dry press molding and dried at 200°C for about 30 minutes.
その後鋳造を溶湯温度を７００℃に段室して行い鋳造後
に鋳造物を水中投下し、その後高圧水にて中子を崩壊、
流出させた。高圧水としては高圧温水を使用することが
望ましい。After that, casting was carried out in a step chamber with the molten metal temperature at 700℃, and after casting, the casting was dropped into water, and then the core was collapsed with high-pressure water.
It leaked out. It is desirable to use high-pressure hot water as the high-pressure water.
なお重力＆５造ではプレス成形やスリップキャスティン
グ型成形が可能であるが、加圧鋳造で４、ｔ１成形後さ
らに冷間静水圧加圧を要する。Note that press molding or slip casting molding is possible in gravity & 5 molding, but pressure casting requires cold isostatic pressing after 4, t1 molding.
以上の工程を経て製作した中子の崩壊性についてテスト
した結果を上記第１表の右欄に示す。表中、○は１ｌｆ
ＦＪ性良好、Δはやや崩壊性に劣ることを示す。また＊
マークは水）ｍ壊性を亢進させるためのモンモリロナイ
ト鉱物やカルシア（Ｃａｂ）等膨潤性のある材料を添加
したことを示す。The results of testing the collapsibility of the cores produced through the above steps are shown in the right column of Table 1 above. In the table, ○ is 1lf
Good FJ property, Δ indicates slightly poor disintegration property. Also*
The mark indicates that a swelling material such as montmorillonite mineral or calcia (Cab) was added to enhance water rupture.
（以下余白）
（応用例）
本発明の中子組成物をオイルギヤラリ−付ピストンの製
造に適用した。(Left below) (Application example) The core composition of the present invention was applied to the manufacture of a piston with an oil gear rally.
第１図はアルミニウム合金（ＡＣ８△）を重力した
Ｈ 造にて鋳造骨オイルギヤラリー付ビスｉ−ンの断面
図を示す、、１はビス１〜ン頂面、２はオイルギヤラリ
一部、３はリング溝、４は冷Ｉ！Ｉ７１イルの流れを示
す。Figure 1 shows a cross-sectional view of a screw with an oil gear rally cast using aluminum alloy (AC8△). Ring groove, 4 is cold I! This shows the flow of I71.
このピストンの製造に使用した中子原料は含水マグネシ
ウム珪酸塩とジルコニア（ＺｒＯ２）との混合比を８０
： ２０ （車量比）にて混合し、乾式プレス成形後
、２００℃で３０分乾燥させた。The core raw material used to manufacture this piston has a mixing ratio of hydrated magnesium silicate and zirconia (ZrO2) of 80.
: 20 (car weight ratio), and after dry press molding, it was dried at 200° C. for 30 minutes.
その後溶瀉渇度７２０℃にて鋳造した。Thereafter, it was cast at a melting temperature of 720°C.
第２図はｖＪ造中子の断面図（略図）を示す。第２図に
おいて、５は中子であり、６は溶、偏金底、７はソフト
フェライト、８は中子と金型とを結合させるマグネット
、９は中子賃金型である。FIG. 2 shows a cross-sectional view (schematic diagram) of the vJ core. In FIG. 2, 5 is a core, 6 is a melted metal bottom, 7 is a soft ferrite, 8 is a magnet for connecting the core and the mold, and 9 is a core type.
次いで水に浸し、７０℃、５ｋｑ／ｃｍ２の高圧水にて
中子を崩壊除去した。ピストンを切開し、中子残りを調
べたが、完全に中子は除去され、また鋳肌は２５ＲＺ以
下となった。The core was then immersed in water, and the core was disintegrated and removed using high-pressure water at 70° C. and 5 kq/cm 2 . The piston was cut open and the remaining core was examined, but the core was completely removed and the casting surface was below 25RZ.
［発明の効果〕
本発明の中子組成物によれば、その製作１桿において焼
成工程が不要であり、従来法に比べ大幅な省エネルギー
をｊヱ成できる。高圧水による水崩壊で流出して中子材
料は乾燥（１００℃〜５００℃）するだけで再利用でき
るため省ｎ源を実現でき、かつ主原料として使用するマ
グネシウム珪酸塩は、溶渇企属との濡れ性が悪く、従っ
て潟流れ速度が大であり、結果的に溶）ｑ温度を低下さ
せることができる。[Effects of the Invention] According to the core composition of the present invention, a firing step is not required in one rod of its manufacture, and significant energy savings can be achieved compared to conventional methods. The core material that flows out due to water disintegration by high-pressure water can be reused by simply drying (100°C to 500°C), which saves energy resources, and the magnesium silicate used as the main raw material is The wettability with the molten metal is poor, so the lagoonal flow rate is high, and as a result, the temperature of the molten metal can be lowered.
第１図は本発明の応用例におけるオイルギヤラリ−付ピ
ストンの断面図であり、第２図はオイルギヤラリ−付ビ
ス１−ンの鋳造に使用した中子の断面図である。
５・・・中子（中子組成物）
特訂出願人 アイシン精機株式会社代理人
弁理士 大川 宏
同 弁理士 丸山明夫
第１図FIG. 1 is a sectional view of a piston with an oil gear rally in an applied example of the present invention, and FIG. 2 is a sectional view of a core used for casting the screw 1 with an oil gear rally. 5... Core (core composition) Special applicant Agent: Aisin Seiki Co., Ltd.
Patent attorney Hirodo Okawa Patent attorney Akio Maruyama Figure 1
Claims (3)
より揺変性を示すことを特徴とする中子組成物。(1) A core composition characterized by containing at least a hydrated magnesium silicate and exhibiting thixotropy upon water absorption.
１項記載の中子組成物。(2) The core composition according to claim 1, which contains a heat-resistant and difficult-to-sinter inorganic powder material.
Ｏ＿３）、シリカ（ＳｉＯ＿２）、ジルコニア（ＺｒＯ
＿２）、炭化珪素（ＳｉＣ）等セラミックス粉末である
特許請求の範囲第２項記載の中子組成物。(3) The heat-resistant and difficult-to-sinter inorganic powder material is alumina (Al_2
O_3), silica (SiO_2), zirconia (ZrO
_2) The core composition according to claim 2, which is a ceramic powder such as silicon carbide (SiC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22267386A JPS6376737A (en) | 1986-09-19 | 1986-09-19 | Core composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22267386A JPS6376737A (en) | 1986-09-19 | 1986-09-19 | Core composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6376737A true JPS6376737A (en) | 1988-04-07 |
Family
ID=16786136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22267386A Pending JPS6376737A (en) | 1986-09-19 | 1986-09-19 | Core composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6376737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824742A (en) * | 2017-11-27 | 2018-03-23 | 河南博威热能科技有限公司 | A kind of amorphous state moulding sand for casting and its manufacture method |
| CN114309450A (en) * | 2021-12-10 | 2022-04-12 | 东华大学 | Composite raw sand for metal casting |
-
1986
- 1986-09-19 JP JP22267386A patent/JPS6376737A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824742A (en) * | 2017-11-27 | 2018-03-23 | 河南博威热能科技有限公司 | A kind of amorphous state moulding sand for casting and its manufacture method |
| CN114309450A (en) * | 2021-12-10 | 2022-04-12 | 东华大学 | Composite raw sand for metal casting |
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