JPH01299750A - Method for holding heat of molten metal in injection sleeve - Google Patents
Method for holding heat of molten metal in injection sleeveInfo
- Publication number
- JPH01299750A JPH01299750A JP63129367A JP12936788A JPH01299750A JP H01299750 A JPH01299750 A JP H01299750A JP 63129367 A JP63129367 A JP 63129367A JP 12936788 A JP12936788 A JP 12936788A JP H01299750 A JPH01299750 A JP H01299750A
- Authority
- JP
- Japan
- Prior art keywords
- injection sleeve
- molten metal
- heat insulating
- powder
- injection
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 50
- 239000007924 injection Substances 0.000 title claims abstract description 50
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 34
- 239000002184 metal Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims description 26
- 238000009413 insulation Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 14
- 239000011810 insulating material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007610 electrostatic coating method Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 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
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ダイカストマシン等、射出スリーブ内に一担
給潟した溶湯を金型のキャビティ内へ射出充填させてｖ
Ｉ造するようにした鋳造装置における射出スリーブ内の
溶湯の保温方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention is applied to a die-casting machine, etc., in which molten metal is injected and filled into a cavity of a mold.
The present invention relates to a method for keeping the temperature of molten metal in an injection sleeve in a casting apparatus designed for I-casting.
〈従来の技術〉
射出スリーブ内に給湯された溶湯は温麿低下が速く、給
湯後素早く射出してやらないと部分的に凝固して充填不
良や鋳肌欠陥を生じる。かと言って、高速で射出すると
スリーブ内のガス（空気等）を巻込み、鋳巣やピンホー
ルが多く発生する。<Prior Art> The temperature of the molten metal supplied into the injection sleeve decreases rapidly, and if the molten metal is not injected quickly after supplying the molten metal, it will partially solidify, resulting in incomplete filling and casting surface defects. On the other hand, when injected at high speed, gas (air, etc.) inside the sleeve is drawn in, creating many cavities and pinholes.
従って、高品質の鋳物を生産性良く鋳造する上で、射出
スリーブ内に給湯された溶湯を凝固しないように保温す
ることは重要な条件となる。Therefore, in order to cast high-quality castings with good productivity, it is an important condition to keep the molten metal fed into the injection sleeve warm so that it does not solidify.
そこで、射出スリーブ内の溶湯の凝固を防ぐ方法として
、従来機のようなことが考えられた。Therefore, as a method for preventing the solidification of the molten metal within the injection sleeve, methods similar to those used in conventional machines were considered.
■射出スリーブを保温性の高いセラミックスで成形する
方法。■A method of molding the injection sleeve using ceramics with high heat retention properties.
■ホットチャンバ化する方法。■How to create a hot chamber.
■縦型射出をはじめとして、射出スリーブと溶湯との接
触をできるだけ少なくする方法。■Methods such as vertical injection that minimize contact between the injection sleeve and the molten metal.
■射出スリーブを外部加熱する方法。■Method of externally heating the injection sleeve.
しかし乍ら、上記■の方法は耐衝撃性に問題があり現段
階では実用化されておらず、また上記■の方法は亜鉛な
ど融点の低い溶湯では可能だが、アルミニュウムなどの
融点の高い溶湯には実用化されていない。又、上記■の
方法では実際的にほとんど効果がなく、上記■の方法は
維持管理が難しく生産性が悪くなる等の不具合がある。However, the above method (■) has a problem with impact resistance and is not put into practical use at this stage.Also, the above method (■) is possible for molten metals with a low melting point such as zinc, but it cannot be used for molten metals with a high melting point such as aluminum. has not been put into practical use. Furthermore, the above method (2) has almost no practical effect, and the above method (2) has problems such as difficult maintenance and poor productivity.
〈発明が解決しようとする課題〉
本発明はこの様な従来の不具合に鑑みてなされたもので
あり、射出スリーブ内に給湯された溶湯を凝固しないよ
うに簡便且つ効果的に保持することが出来、しかも鋳造
製品にいささかも悪影響を与える虞れのない新規な射出
スリーブ内の溶湯の保温方法を提供せんとするものであ
る。<Problems to be Solved by the Invention> The present invention has been made in view of such conventional problems, and it is possible to simply and effectively hold the molten metal supplied into the injection sleeve so as not to solidify it. Moreover, it is an object of the present invention to provide a novel method for keeping the temperature of molten metal in an injection sleeve without causing any adverse effects on cast products.
く課題を解決Ｊるための手段〉
斯る目的を達成する本発明射出スリーブ内の溶湯の保温
方法は、射出スリーブの内面に粉状断熱剤を塗布し、然
る後に、射出スリーブ内に溶湯を給湯するようにした事
を特徴としたものである。Means for Solving the Problems〉 The method of keeping the molten metal in the injection sleeve warm to achieve the above object is to apply a powder heat insulating agent to the inner surface of the injection sleeve, and then inject the molten metal into the injection sleeve. This system is characterized by the fact that it supplies hot water.
く作 用〉
射出スリーブの内面に粉状断熱剤を塗布すると、射出ス
リーブの内面に粉状断熱剤と空気とからなる断熱層が形
成されるので、然るｆｆｌ射出スリーブ内に溶湯を給湯
することにより、溶湯が射出スリーブ表面に直接接触せ
ず、加えて上記断熱層が持つ断熱保温作用と相乗して、
射出スリーブ内の溶湯を保温するものである。Function: When powdered heat insulating material is applied to the inner surface of the injection sleeve, a heat insulating layer consisting of the powdered heat insulating material and air is formed on the inner surface of the injection sleeve, so it is possible to supply molten metal into the ffl injection sleeve. This prevents the molten metal from coming into direct contact with the surface of the injection sleeve, and in combination with the heat-insulating effect of the above-mentioned heat-insulating layer,
This is to keep the molten metal inside the injection sleeve warm.
〈実施例〉
射出スリーブの内面に塗布する粉状断熱剤としては、溶
湯と非反応性の粉体、詳しくは例えばボロンや滑石等の
帯電性を有する粉体、或いは金属酸化物や金属硫化物、
金属チッ化物等の粉体、又はこれら粉体に樹脂粉を混合
させた粉体などを使用し得る。尚、上記に挙げた粉体の
なかでも特に、射出スリーブに対するプランジャチップ
の摺滑性を向上させる上で、粉体状態でもって自己潤滑
性を有する粉体を使用することが好ましい。又、粉状断
熱剤の粒径としては、粒径が大きくなると）１出スリ一
ブ内面に塗布した粉体が剥落し易くなるので、０．２ａ
ｍ前後以下とすることが好ましい。<Example> The powder heat insulating agent applied to the inner surface of the injection sleeve may be a powder that is non-reactive with the molten metal, specifically a powder that has electrostatic properties such as boron or talc, or a metal oxide or metal sulfide. ,
Powders such as metal nitrides or powders obtained by mixing these powders with resin powder may be used. Among the above-mentioned powders, it is particularly preferable to use powders that have self-lubricating properties in their powder state in order to improve the slidability of the plunger tip with respect to the injection sleeve. In addition, the particle size of the powder heat insulating agent should be 0.2a, since the powder coated on the inner surface of the first sleeve will easily peel off as the particle size increases.
It is preferable to set it to around m or less.
そして、粉状断熱剤を射出スリーブの内面に塗布させる
方法としては、エアー等のガスをキャリアとしたスプレ
ー法や、或いは静電気を利用した静電塗布法、若しくは
Ｏ−ジンバックのように粉状断熱剤を布袋内に入れて摺
り付けたり叩き付けて塗布する方法などが考えられるが
、射出スリーブの内面に粉状断熱剤を容易に且つむらな
く均等な厚味で塗布しやすい静電塗布法が最も好ましい
。The powder heat insulating material can be applied to the inner surface of the injection sleeve by a spray method using a gas such as air as a carrier, an electrostatic coating method using static electricity, or a powder heat insulating material such as O-Zinbag. Methods such as placing the agent in a cloth bag and applying it by rubbing or tapping are possible, but the most effective method is the electrostatic coating method, which is easy to apply powdered heat insulating agent to the inner surface of the injection sleeve with an even and uniform thickness. preferable.
又、射出スリーブの内面に塗布する粉状断熱剤の厚味、
１！％言すれば粉状断熱剤と空気とで形成される断熱層
の厚味は、粉状断熱剤の粒径によっても異なるが格別な
制約はなく、射出スリーブ内に給湯された溶湯をある時
間（長くとも数秒間）保温し得る程度にできるだけ薄く
設定することが好ましい。第１図は射出スリーブ内面に
塗布した粉状断熱剤の状態を説明する模式図を示し、図
中１は射出スリーブ、２は粉状断熱剤、３は空気、４は
粉状断熱剤２と空気３とで形成された断熱層である。In addition, the thickness of the powder insulation applied to the inner surface of the injection sleeve,
1! In terms of percentage, the thickness of the heat insulating layer formed by the powder heat insulating material and air varies depending on the particle size of the powder heat insulating material, but there are no particular restrictions. It is preferable to make it as thin as possible so that it can retain heat (for several seconds at most). Figure 1 shows a schematic diagram explaining the state of the powder heat insulating agent applied to the inner surface of the injection sleeve, in which 1 is the injection sleeve, 2 is the powder heat insulator, 3 is air, and 4 is the powder heat insulator 2. This is a heat insulating layer formed with air 3.
而して、射出スリーブの内面に粉状断熱剤を塗布せしめ
、然る後に射出スリーブ内に溶湯を給湯し、金型のキャ
ビティ内へ射出充填するまでの間、射出スリーブ内の溶
湯を凝固しないように保温する。従って、粉状断熱剤は
鋳造ナイクル毎に射出スリーブの内面に塗布するもので
ある。Therefore, the powdered heat insulating material is applied to the inner surface of the injection sleeve, and the molten metal in the injection sleeve is not solidified until the molten metal is supplied into the injection sleeve and injected into the cavity of the mold. Keep warm. Therefore, the powdered heat insulating agent is applied to the inner surface of the injection sleeve for each cast.
〈発明の効果〉
本発明に係る射出スリーブ内の溶湯の保温方法によれば
、以下の効果を奏する。<Effects of the Invention> According to the method for keeping the temperature of molten metal in an injection sleeve according to the present invention, the following effects are achieved.
■ ）１出スリーブ内に溶湯を給湯した際に、溶湯が射
出スリーブ内表面に直接接触することがなく、加えて粉
状断熱剤と空気とで形成された断熱層が持つ断熱保温作
用が相乗して、射出スリーブ内の溶湯を、金型のキャビ
ティ内へ射出充填するまでの間（長くとも数秒間）、凝
固することなく保温することが出来る。■) When molten metal is fed into the injection sleeve, the molten metal does not come into direct contact with the inner surface of the injection sleeve, and in addition, the heat insulation layer formed by the powdered heat insulating agent and air has a synergistic heat insulation effect. As a result, the molten metal in the injection sleeve can be kept warm without solidifying until it is injected and filled into the cavity of the mold (for several seconds at most).
従って、金型のキャビティ内へ射出充填する際に、潟廻
りが良くなり強度のバラ付きを防止できると共に、射出
速度を大１１】にｄくすることが出来るので、ガスの巻
ぎ込みがなく鋳巣やピンホールの少ない叶仝な高品質の
鋳造品を安定して鋳造することが出来るようになる。Therefore, when injecting and filling into the mold cavity, it is possible to improve the circulation and prevent variations in strength, and the injection speed can be increased to 11%, so there is no gas entrainment. It becomes possible to stably cast high-quality cast products with fewer cavities and pinholes.
■ 給湯→射出→侍機に伴う射出スリーブの急激な湿態
衝撃を和らげることが出来るので、射出スリーブの寿命
を大巾に延ずことが出来る。■ The sudden wet shock of the injection sleeve caused by hot water supply → injection → samurai machine can be alleviated, so the life of the injection sleeve can be greatly extended.
■ 粉状断熱剤として自己潤滑性を有する粉体を用いる
ことにより、射出スリーブの潤滑工程並びにエアーブロ
ー工程を省略することが出来、従って鋳造サイクルの短
縮化を図ることが出来る。(2) By using self-lubricating powder as the powder heat insulating agent, the injection sleeve lubrication process and air blow process can be omitted, and the casting cycle can therefore be shortened.
よって、所期の目的を達成し得る。Therefore, the intended purpose can be achieved.
第１図は射出スリーブ内面に粉状断熱剤を塗布した状態
を説明する模式図である。
図中、１は射出スリーブ、２は粉状断熱剤、である。FIG. 1 is a schematic diagram illustrating a state in which a powder heat insulating agent is applied to the inner surface of an injection sleeve. In the figure, 1 is an injection sleeve and 2 is a powder heat insulating agent.
Claims (1)
射出スリーブ内に溶湯を給湯するようにした事を特徴と
する射出スリーブ内の溶湯の保温方法。Apply powder insulation to the inner surface of the injection sleeve, and then
A method for keeping the temperature of molten metal in an injection sleeve, characterized by supplying the molten metal into the injection sleeve.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63129367A JPH01299750A (en) | 1988-05-25 | 1988-05-25 | Method for holding heat of molten metal in injection sleeve |
| KR1019890006956A KR930001050B1 (en) | 1988-05-25 | 1989-05-24 | Heat retaining method for molten metal supplied into injection sleeve and device therefor |
| US07/356,344 US5014765A (en) | 1988-05-25 | 1989-05-24 | Heat retaining method for molten metal supplied into injection sleeve, method of applying heat insulating powder onto an inner surface of the injection sleeve, and device therefor |
| DE68915332T DE68915332T2 (en) | 1988-05-25 | 1989-05-26 | Process for applying insulation powder to the inner surface of the injection sleeve and device therefor. |
| EP89305359A EP0344009B1 (en) | 1988-05-25 | 1989-05-26 | Method of applying heat insulating powder onto an inner surface of the injection sleeve, and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63129367A JPH01299750A (en) | 1988-05-25 | 1988-05-25 | Method for holding heat of molten metal in injection sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01299750A true JPH01299750A (en) | 1989-12-04 |
Family
ID=15007831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63129367A Pending JPH01299750A (en) | 1988-05-25 | 1988-05-25 | Method for holding heat of molten metal in injection sleeve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01299750A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01118353A (en) * | 1987-10-30 | 1989-05-10 | Ahresty Corp | Injection sleeve lubricating method in casting machine |
-
1988
- 1988-05-25 JP JP63129367A patent/JPH01299750A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01118353A (en) * | 1987-10-30 | 1989-05-10 | Ahresty Corp | Injection sleeve lubricating method in casting machine |
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