JPH0577023A - Ceramic stoke for low pressure casting - Google Patents

Ceramic stoke for low pressure casting

Info

Publication number
JPH0577023A
JPH0577023A JP26732591A JP26732591A JPH0577023A JP H0577023 A JPH0577023 A JP H0577023A JP 26732591 A JP26732591 A JP 26732591A JP 26732591 A JP26732591 A JP 26732591A JP H0577023 A JPH0577023 A JP H0577023A
Authority
JP
Japan
Prior art keywords
stoke
layer
wall layer
heat insulating
ceramic
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
Application number
JP26732591A
Other languages
Japanese (ja)
Inventor
Kikuo Ariga
賀 喜久雄 有
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TYK Corp
Original Assignee
TYK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TYK Corp filed Critical TYK Corp
Priority to JP26732591A priority Critical patent/JPH0577023A/en
Publication of JPH0577023A publication Critical patent/JPH0577023A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the solidified stickiness by improving the heat insulating effect of a stoke itself, reducing the transferring heat radiation from an inside wall layer to prevent the heat in the stoke itself from lowering at the time of passing through and discharging molten metal. CONSTITUTION:In the ceramic-made stoke used at the time of executing pressurize-casting to the molten aluminum or aluminum alloy, this stoke is constituted with the inside wall layer 3 and an outside layer 4. Further, this has the peculiarity of multi-layer structure by arranging heat insulating material layer 2 composed of ceramic material and gap part 1 at this intermediate part. By forming the structure provide with the inside wall layer and the outside wall layer, and the heat insulating material layer part and the gap part at between these layers, the original performance is sufficiently held, and the stoke for low pressure casting being solvable to various problems, such as the secureness of the long service life and the safe operation, the improvement of the product quality and the yield, can be provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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際に使用される低圧鋳
造機に用いられる注湯用の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 metal used in a low pressure casting machine used for casting a 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。
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.

【0003】そしてこの溶湯容器内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やチタン合金材またはこ
られの材料の内、外面に黒鉛材、酸化物などの無機質材
のコーティング材により外表面の保護膜としてほどこし
た金属製の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ストー
クが用いられている。
The stoke is used as a pipe for connecting the molten metal in the molten metal container to the upper mold, that is, as a runner for casting the molten metal. What is used as this stalk material is generally a cast iron material, a titanium alloy material, or a material made of metal, which is provided as a protective film on the outer surface with a coating material of an inorganic material such as an oxide on the outer surface. A stalk made of ceramics produced by using a stalk, a silicon carbide-based material, or a silicon nitride-based material as a main raw material is used.

【0004】[0004]

【発明が解決しようとする課題】しかし前者は溶湯との
化学反応度が高く反応により生成した溶融物が不純物と
して溶湯中に混入して品質の低下を招き、品質面で問題
が生ずると共に耐用寿命が短かく取替作業が頻繁とな
り、作用効率にも悪影響をおよぼしている。また後者の
炭化珪素およびまたは窒化珪素を主成分とするセラミッ
クス材は耐用寿命やストーク材により起因する溶湯への
不純物の混入等の問題点は改善されて来ているが、この
両者共に共通して生じている問題点はストークの湯道と
なる内側上部に地金等の付着現象が見られこれらが堆積
して溶湯鋳造時に乱流を起こすとか、内側に付着堆積し
た物が剥落し鋳造時に溶湯中に混在して鋳造物中に混入
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 melt produced by the reaction is mixed as an impurity in the molten metal to deteriorate the quality, which causes a problem in quality and the service life. However, the replacement work becomes frequent and the working efficiency is adversely affected. The latter ceramic materials containing silicon carbide and / or silicon nitride as main components have been improved in terms of service life and inclusion of impurities in the molten metal due to the stalk material. The problem that occurs is that there is a phenomenon of adhesion of metal in the upper part of the inside that is the runway of the stalk, and these deposits cause turbulence during molten metal casting, This causes problems such as being mixed in and mixed in the casting.

【0005】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の調査、研究の結果、
溶湯容器内の湯面加圧し鋳造を行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。この間にストークはストーク
自体よりの熱放散により自体の温度が低下する。このよ
うな状態のストーク中を鋳造のたびに溶湯が流過,排出
(吐出)の繰り返しが行なわれることにより徐々に溶湯
の付着,凝固が繰り返され度重なるにつれて多量の付着
物が堆積することとなる。このため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並
びに製品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, and the cause of the adhesion is investigated by various investigations and researches.
Every time the surface of the molten metal is pressurized and cast, the molten metal in the stalk enters, exits, becomes full, or becomes empty. During this time, the temperature of Stoke lowers due to heat dissipation from Stoke itself. During the stalk in such a state, the molten metal is repeatedly flown and discharged (discharged) at every casting, so that the deposition and solidification of the molten metal are gradually repeated and a large amount of deposits are accumulated as the molten metal is accumulated. Become. Therefore, as described above, the flow of the molten metal during casting is disturbed, and the deposited deposits come off and intervene in the product, resulting in a reduction in work surface and quality and a reduction in product yield. It is the current situation that there is a strong desire to improve

【0006】[0006]

【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の研究・実験を重ねた
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(円周方向部位)で内側壁層を外側壁層の2層と
してこの層間にセラミック材による断熱材層と空隙部を
設けることにより多層かつ断熱材層,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、内側壁層
からの伝達輻射放熱を少なくすることで、溶湯の流過、
吐出の際のストーク材自体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。
[Means for Solving the Problems] In view of the current situation, as a result of various researches and experiments to improve these problems, as a result, at least the portion exposed from the molten metal is in the stalk thickness direction (circumferential direction). (2) The inner wall layer is made into two layers, the outer wall layer, and a heat insulating material layer made of ceramic material and a void are provided between the two layers to increase the heat insulating effect of the stalk itself by providing the heat insulating material layer and the void. By reducing the radiation emitted from the inner wall layer, the flow of molten metal
The purpose is to prevent solidification and adhesion by preventing the heat of the stalk material itself from lowering during discharge.

【0007】本発明の内,外2層の本体内部に、断熱
層、空隙部等による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目的とし
ていてストークの内側壁層と、外側壁層の接合部で熱膨
脹率差等により亀裂を生ずることなく、欠陥を生じなけ
れば異材質を組合せて用いても良く、また同一材質で構
成するのも良いし、又製造時に一体成形することと、
内,外側壁層材を別々に製造した後、接合することも良
い。いづれの方法で製造しても良いが、ストーク円周方
向内部に少なくとも溶湯より露出する部分に断熱材層と
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 present invention is to provide a multi-layer structure with a heat insulating layer, a void, etc. inside the main body of the outer and inner two layers by reducing the heat radiation from the stalk itself to make the metal in the upper part of the stalk hole. For the purpose of suppressing adhesion and deposition, even if different materials are used in combination, no cracks are generated at the joint between the inner wall layer of the stalk and the outer wall layer due to the difference in coefficient of thermal expansion, etc. It is good, and it is good to be composed of the same material, and to integrally mold at the time of manufacturing,
The inner and outer wall layer materials may be manufactured separately and then joined. It may be manufactured by either method, but it has a multilayer structure in which a heat insulating material layer and a void portion are provided at least in a portion exposed from the molten metal inside the stalk circumferential direction.

【0008】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
る部分に設けるものであるが、外,内側壁層間に備えさ
せた断熱材層、空隙部は周方向に全域でも良いが、内側
壁層部材の補強のため又は内,外側壁層構成のための確
実性のための支持部を設ける等一部無断熱材層部,無空
隙部とすることも本発明の効果を大きくさまたげなけれ
ば自由である。(地金付着、堆積防止の効果を大きくさ
またげなければ良い。) 尚、本発明の中で断熱材層部と空隙部を備えさせる等の
多層構造としている部位は少なくとも溶湯よりの露出部
位には設けるものとしているのはストーク自体からの放
熱をおさえ断熱効果を高め、本発明の効果を確実とする
ためのものである。
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 heat insulating material layer and the void portion provided between the outer and inner side wall layers are Although it may be the entire area in the circumferential direction, some non-insulating material layer parts and void-free parts, such as providing support parts for reinforcement of the inner wall layer member or for certainty for the inner and outer wall layer construction Also, it is free as long as the effect of the present invention is not significantly impeded. (It suffices that the effect of preventing metal adhesion and deposition is not greatly impeded.) In addition, in the present invention, a portion having a multilayer structure such as a heat insulating material layer portion and a void portion is provided at least in an exposed portion from the molten metal. The purpose of the present invention is to suppress the heat radiation from the stalk itself, enhance the heat insulating effect, and ensure the effect of the present invention.

【0009】以上の様に内側壁層と外側壁層とこの層間
に断熱材質部と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、歩留等の向上を計る等諸問題を解決し
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, the structure having the inner side wall layer, the outer side wall layer, and the heat insulating material portion and the void portion between the layers allows the original performance to be sufficiently maintained, and the product has a long life and can be operated safely. It is possible to provide a low-pressure casting stalk capable of solving various problems such as improving the quality and yield of the product.

【0010】次に実施例を示す。Next, examples will be shown.

【0011】[0011]

【表1】 [Table 1]

【0012】実施例に用いた材料を次の表1に示す。The materials used in the examples are shown in Table 1 below.

【0013】[0013]

【表2】 [Table 2]

【0014】A材はSiC、Si34、Si質材料と
して表1に示す。比率で配合調整してスリップキャステ
ィング法で成形し窒素ガス雰囲気中で反応硅結を行い、
製出する。本材は、本発明実施例中では外側壁層材及び
内側壁層材の両方材として用いる。 B材はSiC−Si34−Y23質材料を原料として
表1に示す比率で配合、調整し、ラバープレス(CI
P)により3000kg/cm2の高圧力を掛け成形
後、生加工を行い窒素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層材として用いる。
The material A is shown in Table 1 as SiC, Si 3 N 4 and Si material. Mix proportions, mold by slip casting method, and perform reaction sintering in nitrogen gas atmosphere,
To produce. This material is used as both the outer wall layer material and the inner wall layer material in the examples of the present invention. B material compounded in ratios shown in Table 1 the SiC-Si 3 N 4 -Y 2 O 3 quality material as a raw material, adjusted, rubber pressing (CI
P), a high pressure of 3000 kg / cm 2 is applied, and after forming, raw processing is performed and sintering is performed in a nitrogen atmosphere to produce. This material is used as the inner wall layer material in the examples of the present invention.

【0015】[0015]

【実施例】内径φ60外径φ110長さ1000mで上
部フランジ部30mm×30mmの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500
mm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。
[Example] When using a stalk having an inner diameter of φ60, an outer diameter of φ110, and a length of 1,000 m and an upper flange portion of 30 mm × 30 mm, the molten metal immersion portion is always 500 from the bottom of the stalk.
A working example is shown as a stalk for a low-pressure casting machine used in a state of being immersed in mm. The void is formed 20 mm below the top of the stalk and 80 mm below the stalk.

【0016】[0016]

【表3】 [Table 3]

【0017】次に実施態様について示す。 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±0.03kg/c
2 鋳造時の溶湯温度 730℃±5℃
Next, an embodiment will be described. Results of use and comparison
Used by mounting on a low pressure casting machine. Casting material Aluminum with 99% Al content Casting pressure 0.6 kg / cm2± 0.03kg / c
m2  Molten metal temperature during casting 730 ° C ± 5 ° C

【0018】[0018]

【表4】 [Table 4]

【0019】А 付着量(mm) B 不良率(%)(鋳造品不良率)Adhesion amount (mm) B defective rate (%) (cast product defective rate)

【0020】以上に示されるように比較例は稼働時間
320時間で不良率が10.8%と高く取替を行い、
は1600時間稼働時の不良率が4.2と徐々に高くな
って来ているが本発明実施例、、は1600時間
稼働後もストークの孔内付着物も1.4〜1.9mmと
少なくて不良率も1.4%〜1.9%と低い値であっ
た。なお図1〜図4において、1は空隙部、2は断熱材
層、3は内側壁層、4は外側壁層、5は接着材、そして
6はAl湯面である。
As shown above, in the comparative example, the defective rate was as high as 10.8% in 320 hours of operation, and replacement was performed.
The defect rate after 1600 hours of operation has gradually increased to 4.2, but the present invention's embodiment shows that the stalk deposits in the holes are as low as 1.4 to 1.9 mm even after 1600 hours of operation. The defective rate was as low as 1.4% to 1.9%. 1 to 4, 1 is a void portion, 2 is a heat insulating material layer, 3 is an inner side wall layer, 4 is an outer side wall layer, 5 is an adhesive, and 6 is an Al molten metal surface.

【0021】[0021]

【発明の効果】以上実施例に示すように比較品は32
時間使用後でも付着が認められ、320時間の時点で付
着堆積量が6.8〜9.4mmとなり使用中止、比較品
は以後継続使用すると1600時間の時点で2.7〜
3.1mmの付着があり、この時点での不良率は4.2
%と高くなって来ているのに比べ本発明品の実施例、
、は1600時間使用後での付着量も0.3〜0.
9mmに、また不良率も1.4%〜1.9%にとどま
り、ストーク孔内での地金の付着量は比較例に比べて
も23〜24%不良率では33%〜45%にとどまり操
業上も全く問題がなくかつ品質面、製品歩留(不良率の
低減)も大巾に改善することが出来、その効果は絶大な
るものがあった。
As shown in the above examples, the comparison product is 32
Adhesion was observed even after a long time of use, and the amount of adhered deposits reached 6.8 to 9.4 mm at 320 hours, and the use was stopped, and the comparative product continued to be used after 2.7 hours at 1600 hours.
There was 3.1 mm of adhesion, and the defective rate at this point was 4.2.
Example of the product of the present invention, which is higher than
, Has an adhesion amount of 0.3-0.
The defective rate was 9 mm, and the defective rate was 1.4% to 1.9%. The amount of metal adhered in the stalk hole was 23% to 24% compared to the comparative example, and the defective rate was 33% to 45%. There was no problem in operation, and the quality and product yield (reduction of defective rate) could be greatly improved, and the effect was great.

【図面の簡単な説明】[Brief description of drawings]

【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 view of a conventional product comparative example ceramic stalk.

【図3】本発明品実施例、セラミックスストークの
説明図でるある。
FIG. 3 is an explanatory view of a ceramic stalk according to an embodiment of the present invention.

【図4】本発明品実施例セラミックスストークの説明
図である。
FIG. 4 is an explanatory diagram of a ceramic stalk according to an example of the present invention.

【符号の説明】[Explanation of symbols]

1 空隙部 2 断熱材層 3 内側壁層 4 外側壁層 5 接着材 6 Al湯面 1 void part 2 heat insulating material layer 3 inner side wall layer 4 outer side wall layer 5 adhesive 6 Al molten metal surface

Claims (1)

【特許請求の範囲】[Claims] アルミニウムまたはアルミニウム合金の溶湯を加圧鋳造
する際に用いられるセラミックス製ストークにおいて、
内側壁(層)と外側壁(層)とで構成し、この中間部に
セラミックス材による断熱材層と空隙部を設けて成る多
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。
In the ceramic stalk used when pressurizing molten aluminum or aluminum alloy,
A ceramic stalk for low-pressure casting, which has a multi-layer structure including an inner wall (layer) and an outer wall (layer), and a heat insulating material layer made of a ceramic material and a void portion provided in an intermediate portion thereof.
JP26732591A 1991-09-18 1991-09-18 Ceramic stoke for low pressure casting Pending JPH0577023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26732591A JPH0577023A (en) 1991-09-18 1991-09-18 Ceramic stoke for low pressure casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26732591A JPH0577023A (en) 1991-09-18 1991-09-18 Ceramic stoke for low pressure casting

Publications (1)

Publication Number Publication Date
JPH0577023A true JPH0577023A (en) 1993-03-30

Family

ID=17443255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26732591A Pending JPH0577023A (en) 1991-09-18 1991-09-18 Ceramic stoke for low pressure casting

Country Status (1)

Country Link
JP (1) JPH0577023A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010017743A (en) * 2008-07-11 2010-01-28 Nichias Corp Intermediate stalk, its manufacturing method, and low pressure casting apparatus
US8155890B2 (en) 2005-12-16 2012-04-10 Toyota Jidosha Kabushiki Kaisha Exhaust gas analysis method and exhaust gas analysis apparatus
US8208143B2 (en) 2005-04-28 2012-06-26 Toyota Jidosha Kabushiki Kaisha Exhaust gas analyzer
CN107552765A (en) * 2017-08-11 2018-01-09 徐州东力锻压机械有限公司 A kind of stalk for being used to cast

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8208143B2 (en) 2005-04-28 2012-06-26 Toyota Jidosha Kabushiki Kaisha Exhaust gas analyzer
US8155890B2 (en) 2005-12-16 2012-04-10 Toyota Jidosha Kabushiki Kaisha Exhaust gas analysis method and exhaust gas analysis apparatus
JP2010017743A (en) * 2008-07-11 2010-01-28 Nichias Corp Intermediate stalk, its manufacturing method, and low pressure casting apparatus
CN107552765A (en) * 2017-08-11 2018-01-09 徐州东力锻压机械有限公司 A kind of stalk for being used to cast
CN107552765B (en) * 2017-08-11 2020-07-28 徐州东力锻压机械有限公司 Be used for as cast stalk

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