JPH0577022A - Ceramic stoke for low pressure casting - Google Patents
Ceramic stoke for low pressure castingInfo
- Publication number
- JPH0577022A JPH0577022A JP26732491A JP26732491A JPH0577022A JP H0577022 A JPH0577022 A JP H0577022A JP 26732491 A JP26732491 A JP 26732491A JP 26732491 A JP26732491 A JP 26732491A JP H0577022 A JPH0577022 A JP H0577022A
- Authority
- JP
- Japan
- Prior art keywords
- stoke
- stalk
- molten metal
- wall
- layers
- 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
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明はアルミニウムまたはア
ルミニウム合金の溶湯を鋳造する低圧鋳造機に用いられ
る注湯用セラミックス製ストークに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic stalk for pouring, which is used in a low-pressure casting machine for casting molten aluminum or aluminum alloy.
【0002】[0002]
【従来の技術】低圧鋳造機は上部に設置された鋳型へ下
部のるつぼ等の溶湯容器内の溶湯の湯面を加圧して鋳造
するものである。そしてこの溶湯容器の溶湯を上部にあ
る鋳型との間をつなぐ管、即ち溶湯鋳込み用湯道として
用いられるのがストークである。このストーク材として
用いられるものは一般には鋳鉄製材、チタン、合金材ま
たはこれらの材料の内面および/または外面に黒鉛材、
酸化物等の無機質コーティング材により外表面の保護膜
としてほどこした金層製ストークや炭化珪素質材及びま
たは窒化珪素質材料を主原料として製出したセラミック
ス製のものが用いられている。2. Description of the Related Art A low pressure casting machine casts a molten metal surface in a molten metal container such as a lower crucible into a mold installed in an upper portion to cast the molten metal. The stalk is used as a pipe for connecting the molten metal of the molten metal container to the upper mold, that is, as a molten metal pouring runner. What is used as this stalk material is generally cast iron material, titanium, alloy material or graphite material on the inner and / or outer surface of these materials,
There is used a stalk made of a gold layer provided as a protective film on the outer surface with an inorganic coating material such as an oxide, or a ceramic material produced from a silicon carbide based material or a silicon nitride based material as a main raw material.
【0003】[0003]
【発明が解決しようとする課題】しかし前者は溶湯との
化学反応性が高く、反応生成物(溶損物)が不純物とし
て溶湯中に混入し、品質の低下を招き品質面で問題を生
ずると共に耐用寿命が短く取替作業が頻繁となり作業効
率にも悪影響を及ぼしている。また後者の炭化硅素およ
びまたは窒化珪素を主成分とするセラミックス材ではス
トーク材に起因する溶湯への不純物混入や耐用面等では
大きな改善効果が見られるが、これら両者共に共通した
問題点はストークの湯道となる内側の上部に地金等の付
着現象が見られ、溶湯の移送(鋳造)時、乱流を生ずる
とか、この付着物が剥落し、鋳込み時、溶湯中に混在し
鋳造物中に混入する等の問題を生じている。However, the former has a high chemical reactivity with the molten metal, and the reaction product (melting substance) is mixed into the molten metal as an impurity, resulting in deterioration of quality and a problem in quality. It has a short service life and requires frequent replacement work, which adversely affects work efficiency. In the latter case, the ceramic material mainly composed of silicon carbide and / or silicon nitride has a great improvement effect in mixing impurities into the molten metal due to the stalk material and in terms of serviceability. In the upper part of the inner side, which is the runner, the adhesion phenomenon of metal is observed, and when the molten metal is transferred (casting), a turbulent flow is generated, or the deposited material is peeled off and mixed in the molten metal at the time of casting. It causes problems such as being mixed in.
【0004】本発明は前記問題点を解決しようとするも
のであり、この付着の原因を種々調査、研究の結果、溶
湯容器内の湯面を加圧し、鋳造を行なうたびにストーク
内の溶湯がストークの上部に入ったり、出たりし、満杯
になったり、空になったりする。この間ストークはスト
ーク自体熱放散があり、ストーク自体の温度が下がるこ
のような状態のストークの中を鋳造のたびに溶湯の流過
排出(吐出)の繰り返しにより徐々に凝固付着が重なり
多量の付着物が堆積することとなり、前述の如く鋳造時
の溶湯の流れに乱れを生じたり、付着堆積物が剥落混入
して製品中に介在することとなり、作業面及び品質の低
下及び歩留りの低下を招くもので、この現象を改善する
ことが強く望まれているのが現状である。The present invention is intended to solve the above-mentioned problems. As a result of various investigations and studies on the cause of this adhesion, as a result of pressurizing the molten metal surface in the molten metal container, the molten metal in the stalk is removed every time casting is performed. Enters, exits, fills, or empties the top of the stalk. During this time, the stalk itself dissipates heat, and the temperature of the stalk itself drops. In such a state of stalk, solidification and adhesion gradually overlaps due to repeated molten metal discharge (discharge) each time casting occurs, and a large amount of adhered material As a result, as described above, the molten metal flow is disturbed during casting, and the deposited deposits fall off and intervene in the product, resulting in a reduction in work surface and quality and a reduction in yield. Therefore, there is a strong demand for improving this phenomenon.
【0005】[0005]
【課題を解決するための手段】この様な現状に鑑みこれ
らの問題点を改善するため種々研究の結果、少なくとも
溶湯より露出する部分をストークの肉厚方向で内側壁層
と外側壁層の2層とし、この間に空隙部を設けることに
より多層かつ空隙部を備えさせることによりストーク自
体の断熱効果を高め、内側壁からの伝達放熱を少なくし
て溶湯の流入吐出の際のストーク材の低熱化を防ぐこと
により凝固付着を防止することにある。As a result of various studies in order to improve these problems in view of the current situation, at least the portion exposed from the molten metal is divided into the inner wall layer and the outer wall layer in the stalk thickness direction. Layers, and by providing voids between these layers, providing multiple layers and voids enhances the heat insulating effect of the stalk itself, reduces the heat radiation transferred from the inner wall, and lowers the heat of the stalk material when the molten metal flows in and out. It is to prevent solidification and adhesion by preventing
【0006】本発明の多層構造とする主旨は、ストーク
自体からの放熱をより少なくすることにより、ストーク
の孔内上部での地金付着堆積を抑制することを最大の目
的としているため、その構造にあるのでストークの内層
壁材と外層壁材の接合部で熱膨脹率差により亀裂を生じ
る等の欠陥を生じないならば異材質を用いても良く、ま
た同一材質で構成するのも良いし、製造時に一体成形す
ることも、内,外層材を個々に製造した後、接合するこ
とも良い。いづれの方法で製造しても良いが内に空隙部
を設けた形の多層構造とすることにある。The main purpose of the multi-layer structure of the present invention is to suppress the deposition of metal on the upper part of the stalk hole by suppressing the heat radiation from the stalk itself. Therefore, different materials may be used if they do not cause defects such as cracks due to the difference in thermal expansion coefficient at the joint between the inner wall material and outer wall material of the stalk, or they may be composed of the same material, It may be integrally formed at the time of manufacturing, or may be manufactured after the inner and outer layer materials are individually manufactured and then joined. Either method may be used for manufacturing, but it is to have a multi-layer structure in which voids are provided therein.
【0007】また断熱性を高めるために構成する多層構
成部位はその目的と効果より少なくとも溶湯より露出す
る部分には設けるものであるが、内外側壁層間に備えさ
せる空隙部は同方向に全域で良いが、内側壁部材の補強
のため又は内外側壁構成のための確実性のための支持部
を設ける等一部無空隙部をすること本発明の効果を大き
く妨げることがなければ自由であり、地金付着堆積を防
止する効果をさまたげなければ良い。Further, the multi-layered structural portion configured to enhance the heat insulating property is provided at least in a portion exposed from the molten metal for its purpose and effect, but the void portion provided between the inner and outer wall layers may be in the same region all over. However, it is free to form a non-void portion such as providing a support portion for reinforcement of the inner wall member or for certainty for forming the inner and outer wall members as long as the effect of the present invention is not significantly impaired. It is only necessary to prevent the effect of preventing gold deposition.
【0008】本発明の中で空隙部を備える等、多層構造
となした部分を少なくとも溶湯よりの露出部分に設ける
としているのは断熱効果を高め、本発明の効果を確実に
するためのものである。In the present invention, the reason that the portion having a multi-layer structure, such as having a void portion, is provided at least in the exposed portion from the molten metal is to enhance the heat insulating effect and ensure the effect of the present invention. is there.
【0009】以上の様に内側壁と外側壁をこの間に空隙
部を備える構造とすることにより、本来の性能を充分保
持させ長寿命でかつ安全な操業が出来、製品の品質、歩
留り等の向上を計る等諸問題点を解決し得る低圧鋳造用
ストークが提供できるものである。As described above, by providing the inner wall and the outer wall with the space between them, the original performance can be sufficiently maintained, the long life and safe operation can be performed, and the quality of the product, the yield, etc. can be improved. It is possible to provide a low pressure casting stalk capable of solving various problems such as measuring
【0010】次に実施例を示す。Next, examples will be shown.
【0011】[0011]
【表1】 [Table 1]
【0012】実施例に用いたストーク材を次に示す。
(表−1) A材はSiC−Si3N4−Si質材料を原料とし表1
に示す比率で配合調整しスリップキャスティング法で成
形し、窒素ガス雰囲気中で反応焼結を行い製出する。本
材は本発明実施例中では外側壁材及び内側壁材の両方材
として用いた。 B材はSie−Si3N4−Y2O3質材料を原料とし表
1に示す比率で配合調整 しラバープレス(CIP)に
より成形加工脱脂を行い窒素ガス雰囲気中で焼結 させ
製出する。本材は本発明実施例中では内側壁材として用
いる。The stalk material used in the examples is shown below.
(Table -1) A material the SiC-Si 3 N 4 -Si material as a raw material in Table 1
The composition is adjusted at the ratio shown in (1) and molded by the slip casting method, and reactive sintering is performed in a nitrogen gas atmosphere to produce the product. This material was used as both the outer wall material and the inner wall material in the examples of the present invention. Material B is produced by using Sie-Si 3 N 4 —Y 2 O 3 material as a raw material, adjusting the compounding ratio in the ratio shown in Table 1, degreasing with a rubber press (CIP), and sintering in a nitrogen gas atmosphere. . This material is used as the inner wall material in the examples of the present invention.
【0013】[0013]
【実施例】内径φ60外径φ110長さ1000mで上
部フランジ部30mm×30mmの出張りを有するスト
ークで使用時、常時溶湯浸漬部はストーク下端より50
0mm浸漬している状態で使用されている。低圧鋳造機
用のストークとして使用実施例を示す。尚空隙部はスト
ーク上部より20mm下部よりφ80の位置に設け製出
する。次に実施例の態様について示す。[Example] Inner diameter φ60 Outer diameter φ110 Length 1000 m When using a stalk with an upper flange of 30 mm x 30 mm, the molten metal immersion part is always 50 from the bottom of the stalk.
It is used in a state of being immersed for 0 mm. A use example is shown as a stalk for a low pressure casting machine. The void is formed 20 mm below the top of the stalk and 80 mm below the stalk. Next, the aspect of an Example is shown.
【0014】[0014]
【表2】 [Table 2]
【0015】[0015]
【表3】 [Table 3]
【0016】実施使用結果 比較例、及び本発明品例、、をアルミニウム
低圧鋳造機に装着して使用する。 鋳造材料 Al含有量99%のアルミニウム 鋳造圧力 0.6Kg/cm2 20.03Kg/c
m2 鋳造時の溶湯温度 730℃±5℃Results of use and practice
Used by mounting on a low pressure casting machine. Casting material Aluminum with 99% Al content Casting pressure 0.6 Kg / cm220.03 Kg / c
m2 Molten metal temperature during casting 730 ° C ± 5 ° C
【表3】実用状況(1日8時間稼働)で比較例及び
は実稼働320時間40日で取替えを行うが本発明品
、、は150日、1200時間稼働使用するが0
〜0.2mmと極少なく定期整備時期まで耐用再使用に
入る。[Table 3] In a practical situation (8 hours a day operation), a comparative example and an actual operation are replaced for 320 hours and 40 days, but the product of the present invention operates for 150 days and 1200 hours.
It is as small as ~ 0.2mm and can be reused until the maintenance period.
【0017】なお図1〜図4において、1は空隙部、2
は内側壁、3は外側壁、4は接着材、そして5は湯面で
ある。In FIGS. 1 to 4, 1 is a void portion, 2
Is an inner wall, 3 is an outer wall, 4 is an adhesive, and 5 is a molten metal surface.
【0018】[0018]
【発明の効果】以上実施例に示すように比較品、は
1日8時間稼働で2日間の使用後でも付着が認められ4
0日間320時間の時差で付着堆積量が6.8〜9.4
mm,5.6〜6.2mmとなり取替ざるを得ない状態
となるが、本発明品実施例、、はいづれも0〜
0.3mmと少なく更に使用を進め約6ヶ月使用後(1
50日1200時間後)も付着量にほとんど差がなく、
定期整備後再使用に入る。また、鋳造品不良比率も比較
品が10.8%〜9.2%に対して本発明品は2.5%
〜2.1%と非常に少なく操業上も全く問題を生せず品
質上歩留上からも絶大なる効果をあげることが出来た。EFFECTS OF THE INVENTION As shown in the above examples, the comparative product was operated for 8 hours a day, and adhesion was observed even after use for 2 days.
The amount of adhered deposits is 6.8 to 9.4 with a time difference of 320 hours for 0 days.
mm, 5.6 to 6.2 mm, which means that there is no choice but to replace it.
It is as small as 0.3 mm and is used further for about 6 months (1
Even after 50 hours 1200 hours), there is almost no difference in the amount of adhesion,
Reuse after regular maintenance. In addition, the defective rate of the cast product is 2.5% for the product of the present invention as compared with 10.8% to 9.2% for the comparative product.
It was very small (up to 2.1%), no problem was found during operation, and it was possible to achieve a great effect in terms of quality and yield.
【図1】従来品比較例セラミックス・ストークの説明
図である。FIG. 1 is an explanatory diagram of a conventional product comparative example ceramic stalk.
【図2】従来品比較例セラミックス・ストークの説明
図である。FIG. 2 is an explanatory diagram of a conventional product comparative example ceramic stalk.
【図3】本発明品例、セラミックス・ストークの説
明図である。FIG. 3 is an explanatory view of a product example of the present invention and a ceramic stalk.
【図4】本発明品例セラミックス・ストークの説明図
である。FIG. 4 is an explanatory view of a ceramic stalk according to an example of the present invention.
1 空隙部 2 内側壁 3 外側壁 4 接着材 5 湯面 1 void part 2 inner side wall 3 outer side wall 4 adhesive 5 molten metal surface
Claims (1)
する際に用いるセラミックスストークにおいて、内側壁
と外側壁との2層構造となし、この2層構造間に空隙部
を設けてなる多層構造としたことを特徴とする低圧鋳造
用セラミックスストーク。A ceramic stalk used for pressure casting of molten aluminum or aluminum alloy has a two-layer structure of an inner wall and an outer wall, and has a multi-layer structure in which a void is provided between the two layers. A ceramic stalk for low pressure casting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26732491A JPH0577022A (en) | 1991-09-18 | 1991-09-18 | Ceramic stoke for low pressure casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26732491A JPH0577022A (en) | 1991-09-18 | 1991-09-18 | Ceramic stoke for low pressure casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0577022A true JPH0577022A (en) | 1993-03-30 |
Family
ID=17443241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26732491A Pending JPH0577022A (en) | 1991-09-18 | 1991-09-18 | Ceramic stoke for low pressure casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0577022A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102642008A (en) * | 2012-05-17 | 2012-08-22 | 烟台路通精密铝业有限公司 | Multitube and multi-sprue riser tube |
CN102962431A (en) * | 2012-11-08 | 2013-03-13 | 贵州红林机械有限公司 | Aluminum alloy low-pressure casting liquid rising heat insulation tank |
CN106077577A (en) * | 2016-08-22 | 2016-11-09 | 盛跃丹 | A kind of low-pressure casting mould for wheel hub |
-
1991
- 1991-09-18 JP JP26732491A patent/JPH0577022A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102642008A (en) * | 2012-05-17 | 2012-08-22 | 烟台路通精密铝业有限公司 | Multitube and multi-sprue riser tube |
CN102962431A (en) * | 2012-11-08 | 2013-03-13 | 贵州红林机械有限公司 | Aluminum alloy low-pressure casting liquid rising heat insulation tank |
CN106077577A (en) * | 2016-08-22 | 2016-11-09 | 盛跃丹 | A kind of low-pressure casting mould for wheel hub |
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