JPH0773782B2 - Injection sleeve lubrication method in casting equipment - Google Patents
Injection sleeve lubrication method in casting equipmentInfo
- Publication number
- JPH0773782B2 JPH0773782B2 JP62276595A JP27659587A JPH0773782B2 JP H0773782 B2 JPH0773782 B2 JP H0773782B2 JP 62276595 A JP62276595 A JP 62276595A JP 27659587 A JP27659587 A JP 27659587A JP H0773782 B2 JPH0773782 B2 JP H0773782B2
- Authority
- JP
- Japan
- Prior art keywords
- injection sleeve
- lubricant
- peripheral surface
- injection
- plunger tip
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、鋳造装置における射出スリーブ潤滑法に関す
るものである。詳しくは、射出スリーブ内に射出移動自
在に嵌挿されたプランジャチップをよりスムーズに射出
移動可能ならしめるために、射出スリーブ内周面とプラ
ンジャチップ外周面とを潤滑する射出スリーブ潤滑法に
関するものである。TECHNICAL FIELD The present invention relates to an injection sleeve lubrication method in a casting apparatus. More specifically, it relates to an injection sleeve lubrication method that lubricates the inner peripheral surface of the injection sleeve and the outer peripheral surface of the plunger tip so that the plunger tip fitted in the injection sleeve so as to be capable of injection movement can be injected and moved more smoothly. is there.
＜従来の技術＞ 従来のこの種射出スリーブ潤滑法としては、自己潤滑性
を有する材料を用いて射出スリーブ及び／又はプランジ
ャチップを構成する方法と、射出スリーブ内周面または
プランジャチップ外周面に潤滑剤を塗布する方法とがあ
る。<Prior Art> Conventional injection sleeve lubrication methods include a method of forming an injection sleeve and / or a plunger tip using a material having self-lubricating property, and a method of lubricating the inner peripheral surface of the injection sleeve or the outer peripheral surface of the plunger tip. There is a method of applying the agent.
ところが、従来の潤滑剤を塗布する射出スリーブ潤滑法
では、油脂系潤滑剤のようにそれ自体液状である潤滑剤
を使用する場合は勿論のこと、黒鉛やボロンのようにそ
れ自体では固体又は粉体である潤滑剤を使用する場合で
も、水や油などに溶解又は分散させ液状にして射出スリ
ーブ内周面またはプランジャチップ外周面にスプレー方
式或いは滴下方式にて塗布するようにしていた為、射出
スリーブ内に溶湯を注湯した際に熱に反応してガスを発
生し、このガスが溶湯中に巻き込まれて鋳造品の品質を
低下させてしまう不具合があった。However, in the conventional injection sleeve lubrication method of applying a lubricant, not only when using a lubricant that is in a liquid state itself like an oil-based lubricant, but also when it is a solid or powder itself such as graphite or boron. Even when a body lubricant is used, it is dissolved or dispersed in water, oil, etc., and made into a liquid to be applied to the inner peripheral surface of the injection sleeve or the outer peripheral surface of the plunger tip by spraying or dripping. When the molten metal is poured into the sleeve, it reacts with heat to generate gas, and this gas is entrained in the molten metal, which deteriorates the quality of the cast product.
しかも、液状潤滑剤を射出スリーブ内面に塗布すると、
射出スリーブの内面が冷されるため、射出スリーブ内に
注湯された溶湯の凝固速度が速くなって、射出前の溶湯
の凝固率が多くなり、湯回り不良などの不良品発生を来
たしやすい不具合があった。Moreover, when the liquid lubricant is applied to the inner surface of the injection sleeve,
Since the inner surface of the injection sleeve is cooled, the solidification rate of the molten metal poured into the injection sleeve is high, the solidification rate of the molten metal before injection is high, and defective products such as defective spinning are likely to occur. was there.
そこで、この様な液状潤滑剤を用いた射出スリーブ潤滑
法の不具合をなくすために、固体潤滑剤を含有する固形
状潤滑剤をプランジャチップの外周に塗布する方法が提
案された（特開昭49−73572号公報参照）。Therefore, in order to eliminate the problems of the injection sleeve lubrication method using such a liquid lubricant, a method of applying a solid lubricant containing a solid lubricant to the outer circumference of the plunger tip has been proposed (Japanese Patent Laid-Open No. -73572 gazette).
しかし乍ら、この射出スリーブ潤滑法では、射出スリー
ブの後端から突出したプランジャチップの外周に固形状
潤滑剤を塗布するようにしている為、そもそも潤滑剤の
絶対塗布量が少ない上に、一旦塗布された潤滑剤がプラ
ンジャチップの射出動作時に射出スリーブの後端内周面
で削り取られやすく、効果的な潤滑が期待できなかっ
た。However, in this injection sleeve lubrication method, since the solid lubricant is applied to the outer periphery of the plunger tip protruding from the rear end of the injection sleeve, the absolute amount of lubricant applied is small and The applied lubricant was easily scraped off at the inner peripheral surface of the rear end of the injection sleeve during the injection operation of the plunger tip, and effective lubrication could not be expected.
＜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、射出スリーブ内周面とプランジャチップ外周面と
を確実に潤滑させてプランジャチップのスムーズな射出
動作を期待することが出来ると共に、射出スリーブ内に
注湯された溶湯を保温することが可能となり、その結果
射出前の溶湯の凝固率を大幅に低下させて高品質の鋳造
品を鋳造することが出来る鋳造装置における射出スリー
ブ潤滑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 ensures smooth lubrication of the plunger tip by lubricating the inner peripheral surface of the injection sleeve and the outer peripheral surface of the plunger tip. In addition to being able to expect operation, it is possible to keep the temperature of the molten metal poured into the injection sleeve, and as a result, the solidification rate of the molten metal before injection can be significantly reduced and high quality castings can be cast. It is intended to provide an injection sleeve lubrication method in a casting apparatus capable of
＜課題を解決するための手段＞ 斯る目的を達成する本発明の鋳造装置における射出スリ
ーブ潤滑法は、潤滑性を有する粉状潤滑剤を乾燥した粉
状のまま射出スリーブの内周面全体に、プランジャチッ
プが射出動作する前に塗布させるようにした事を特徴と
したものである。<Means for Solving the Problems> In the injection sleeve lubrication method in the casting apparatus of the present invention for achieving the above object, the powder lubricant having lubricity is applied to the entire inner peripheral surface of the injection sleeve in a dry powder form. The feature is that the plunger tip is applied before the injection operation.
＜作 用＞ 而して、潤滑性を有する粉状潤滑剤は、プランジャチッ
プが射出動作する前、すなわち射出スリーブ内に溶湯を
注湯する直前に射出スリーブの内周面全体に乾燥した粉
状のまま塗布され、射出スリーブ内に注湯された溶湯
は、乾燥した粉状のままの粉状潤滑剤の塗布層で隔てら
れて出力スリーブの内周面に直接接触することがないと
同時に粉状潤滑剤の塗布層が持つ断熱作用により保温さ
れ、プランジャチップの射出動作時には、射出スリーブ
内面に塗布された同状潤滑剤がプランジャチップで剥さ
れつつ潤滑作用を発揮してプランジャチップがスムーズ
に射出移動するようになる。<Operation> Therefore, the powdery lubricant having lubricity is a dry powdery powder on the entire inner peripheral surface of the injection sleeve before the plunger tip is injected, that is, immediately before the molten metal is poured into the injection sleeve. The molten metal applied as it is and poured into the injection sleeve is separated by the dry powdery lubricant coating layer and does not come into direct contact with the inner peripheral surface of the output sleeve. The heat is retained by the heat insulation effect of the lubricant coating layer, and during injection of the plunger tip, the same lubricant applied to the inner surface of the injection sleeve is peeled off by the plunger tip and exerts a lubricating action to make the plunger tip smooth. It comes to eject and move.
＜実施例＞ 本発明で用いる潤滑性を有する粉状潤滑剤としては、例
えば黒鉛や金属等の導電性を有する粉体や、ボロン，滑
石等の非導電性の粉体、或いはこれら粉体に樹脂粉を混
合させた粉体などを挙げることができ、粉体状態でもっ
て自己潤滑性を有するものが好ましい。<Examples> Examples of the powdery lubricant having lubricity used in the present invention include electrically conductive powders such as graphite and metal, non-conductive powders such as boron and talc, or these powders. A powder obtained by mixing resin powder can be used, and a powder having a self-lubricating property is preferable.
そして、この粉状潤滑剤を乾燥した粉状のまま、プラン
ジャチップが射出動作する前に、すなわち射出スリーブ
内に溶湯を注湯する直前に、射出スリーブの内周面全体
に塗布させる。尚、ここで射出スリーブの内周面全体と
は、プランジャチップを射出スリーブの後端位置まで後
退させた状態における射出スリーブの内周面全体をい
う。Then, the powder lubricant is applied to the entire inner peripheral surface of the injection sleeve in a dry powder state before the plunger tip performs the injection operation, that is, immediately before the molten metal is poured into the injection sleeve. Here, the entire inner peripheral surface of the injection sleeve refers to the entire inner peripheral surface of the injection sleeve when the plunger tip is retracted to the rear end position of the injection sleeve.
粉状潤滑剤を射出スリーブの内周面に塗布させる方法と
しては、エアーをキャリアとしたスプレー法でも、静電
気を利用した静電塗布法でも良く、或いはロージンバッ
クのように粉状潤滑剤を袋内に入れて擦り付けたり叩き
付けたりする方法などが考えられる。As a method for applying the powdery lubricant to the inner peripheral surface of the injection sleeve, a spray method using air as a carrier, an electrostatic application method using static electricity, or a powdery lubricant such as a rosin bag is used. A method of putting it in the inside and rubbing it or hitting it can be considered.
＜発明の効果＞ 本発明の鋳造装置におけるスリーブ潤滑法によれば、以
下の効果を奏する。<Effects of the Invention> According to the sleeve lubrication method in the casting apparatus of the present invention, the following effects are exhibited.
潤滑性を有する粉状潤滑剤を乾燥した粉状のまま射
出スリーブの内周面全体に、プランジャチップが射出動
作する前に塗布させるようにしたので、プランジャチッ
プの射出動作が行なわれる際には射出スリーブ内周面前
体が粉状潤滑剤で塗布された状態の潤滑面となり、射出
スリーブ内面に塗布された粉状潤滑剤がプランジャチッ
プの射出動作に伴って剥されつつ潤滑作用を発揮して射
出スリーブ内周面とプランジャチップ外周面とを確実に
潤滑させ、プランジャチップをスムーズに射出移動させ
ることが出来る。Since the powdery lubricant having lubricity is applied to the entire inner peripheral surface of the injection sleeve in a dry powdery state before the plunger tip is injected, when the plunger tip is ejected, The inner peripheral surface of the injection sleeve becomes the lubrication surface in the state of being coated with the powder lubricant, and the powder lubricant applied to the inner surface of the injection sleeve exhibits the lubricating action while being peeled off with the injection operation of the plunger tip. The inner peripheral surface of the injection sleeve and the outer peripheral surface of the plunger tip can be reliably lubricated to smoothly eject and move the plunger tip.
射出スリーブの内周面に潤滑剤を塗布させるに際し
て、従来のように液状のキャリアを必要としないので、
潤滑剤塗布後の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。When applying the lubricant to the inner peripheral surface of the injection sleeve, a liquid carrier is not required unlike the conventional case.
The air blowing step after applying the lubricant can be omitted, and therefore the casting cycle can be shortened.
従来の液状潤滑剤を用いた場合のように、射出スリ
ーブ内に溶湯を注湯した際にガスの発生がなく、その結
果、溶湯中にガスを巻き込むことがなくなるので、鋳造
品の強度が向上すると共に強度のバラ付きが少なくな
る。As in the case of using conventional liquid lubricant, no gas is generated when pouring the molten metal into the injection sleeve, and as a result, gas is not entrained in the molten metal, improving the strength of the cast product. As a result, variations in strength are reduced.
粉状潤滑剤を乾燥した粉状のまま射出スリーブの内
周面全体に塗布するようにしたので、射出スリーブ内に
注湯された溶湯は乾燥した粉状のままの粉状潤滑剤の塗
布層で隔てられて射出スリーブの内周面に直接接触する
ことがないと同時に粉状潤滑剤の塗布層が持つ断熱作用
により保温され、従って射出スリーブの内出面に粉状潤
滑剤を塗布した際に射出スリーブの内周面温度を低下さ
れることがないことと相俟って、射出スリーブ内に注湯
された溶湯の凝固速度が遅くなって射出前の溶湯の凝固
率が大幅に低下し、その結果、湯流れが良く安定し、高
品質の鋳造品を安定して鋳造することが出来る。Since the powder lubricant is applied to the entire inner peripheral surface of the injection sleeve in a dry powder form, the molten metal poured into the injection sleeve is a dry powder powder lubricant coating layer. Are separated from each other and do not come into direct contact with the inner peripheral surface of the injection sleeve, and at the same time are kept warm by the heat insulation effect of the coating layer of powder lubricant, so that when the powder lubricant is applied to the inner and outer surfaces of the injection sleeve. Coupled with the fact that the inner peripheral surface temperature of the injection sleeve is not lowered, the solidification rate of the molten metal poured into the injection sleeve is slowed down, and the solidification rate of the molten metal before injection is significantly reduced. As a result, the flow of molten metal is good and stable, and high-quality cast products can be stably cast.
Claims (1)
のまま射出スリーブの内周面全体に、プランジャチップ
が射出動作する前に塗布させるようにした事を特徴とす
る鋳造装置における射出スリーブ潤滑法。1. A casting apparatus characterized in that a powdery lubricant having lubricity is applied to the entire inner peripheral surface of an injection sleeve in a dry powdery state before a plunger tip is injected. Injection sleeve lubrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62276595A JPH0773782B2 (en) | 1987-10-30 | 1987-10-30 | Injection sleeve lubrication method in casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62276595A JPH0773782B2 (en) | 1987-10-30 | 1987-10-30 | Injection sleeve lubrication method in casting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01118353A JPH01118353A (en) | 1989-05-10 |
| JPH0773782B2 true JPH0773782B2 (en) | 1995-08-09 |
Family
ID=17571636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62276595A Expired - Fee Related JPH0773782B2 (en) | 1987-10-30 | 1987-10-30 | Injection sleeve lubrication method in casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0773782B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01299750A (en) * | 1988-05-25 | 1989-12-04 | Ahresty Corp | Method for holding heat of molten metal in injection sleeve |
| JPH0755362B2 (en) * | 1989-05-31 | 1995-06-14 | 株式会社アーレスティ | Device for applying powdery thermal insulation agent to the inner surface of the injection sleeve |
| JP2674422B2 (en) * | 1992-04-29 | 1997-11-12 | 株式会社デンソー | Solid lubricant spraying device and spraying method |
| JP6541500B2 (en) * | 2015-08-06 | 2019-07-10 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Method of manufacturing transfer belt |
| DE102019107319B4 (en) * | 2019-03-21 | 2022-09-08 | Engel Austria Gmbh | Melting unit for a shaping machine, shaping machine and method for operating one |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS539172B2 (en) * | 1972-11-21 | 1978-04-04 | ||
| JPS537891B2 (en) * | 1972-11-21 | 1978-03-23 | ||
| JPS539173B2 (en) * | 1973-06-29 | 1978-04-04 | ||
| JPS57115494A (en) * | 1981-01-08 | 1982-07-17 | Agency Of Ind Science & Technol | Sliding member used in molten metal |
-
1987
- 1987-10-30 JP JP62276595A patent/JPH0773782B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01118353A (en) | 1989-05-10 |
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