JP2650451B2 - Oil-based lubricant for die casting - Google Patents
Oil-based lubricant for die castingInfo
- Publication number
- JP2650451B2 JP2650451B2 JP1338709A JP33870989A JP2650451B2 JP 2650451 B2 JP2650451 B2 JP 2650451B2 JP 1338709 A JP1338709 A JP 1338709A JP 33870989 A JP33870989 A JP 33870989A JP 2650451 B2 JP2650451 B2 JP 2650451B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- lubricant
- mold
- acid
- die
- 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 - Lifetime
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- Mold Materials And Core Materials (AREA)
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用潤滑剤組成物、より詳しくは高
温潤滑性に優れたダイカスト用油性潤滑剤組成物に関す
る。Description: TECHNICAL FIELD The present invention relates to a lubricant composition for die-casting, and more particularly to an oil-based lubricant composition for die-casting having excellent high-temperature lubricity.
〔従来の技術〕 ダイカスト鋳造では、金型製品部キャビティの潤滑を
行なうため、型開き後に離型剤と称する潤滑剤を吹き付
けて金型表面の潤滑を行ない、アルミニウム等の溶湯の
金型への溶着（焼付き）を低減し、連続鋳造を可能にし
ている。[Prior art] In die casting, in order to lubricate a mold product part cavity, after opening the mold, a lubricant called a release agent is sprayed to lubricate the mold surface, and a molten metal such as aluminum is poured into the mold. Reduces welding (seizure) and enables continuous casting.
このダイカスト用術滑剤（離型剤）は油性潤滑剤と水
溶性潤滑剤とに大別されるが、生産性と安全性の面から
最近では水溶性潤滑剤が多用されている。すなわち、油
性潤滑剤は耐熱性が低いので金型が冷えるのを待つ必要
があり生産性が劣るとともに、燃焼、爆発の危険がある
からである。Die-casting lubricants (release agents) are roughly classified into oil-based lubricants and water-soluble lubricants. Recently, water-soluble lubricants are frequently used in terms of productivity and safety. That is, since the oil-based lubricant has low heat resistance, it is necessary to wait for the mold to cool down, so that the productivity is deteriorated and there is a danger of burning and explosion.
従来のダイカスト法では、上記の水溶性潤滑剤を吹き
付け等の手段で金型表面に塗布するとき多量の潤滑剤を
必要とするため、金型表面上に急激な冷却作用が加わ
り、激しい温度の上下動を生じ、金型寿命が低下すると
いう問題がある。また、多量に用いられた潤滑剤が溶融
金属内に巻き込まれるため、溶融金属を凝固して製品化
した後、例えば溶体化時効処理等の熱処理を施すと、製
品内に巻き込まれた潤滑剤が膨張して製品が膨らみ現象
を引き起こすという問題がある。In the conventional die-casting method, a large amount of lubricant is required when applying the above-mentioned water-soluble lubricant to the mold surface by spraying or the like. There is a problem that vertical movement occurs and the life of the mold is shortened. In addition, since the lubricant used in large quantities is entrained in the molten metal, the solidified molten metal is turned into a product, and then subjected to a heat treatment such as solution aging treatment. There is a problem that the product expands to cause a swelling phenomenon.
そこで、本発明は高温潤滑性に優れて金型寿命を延長
できかつ熱処理可能な品質と生産性を確保した油性潤滑
剤を提供することを目的としている。Therefore, an object of the present invention is to provide an oil-based lubricant which is excellent in high-temperature lubricity, can extend the life of a mold, and can assure heat treatment quality and productivity.
本発明は、上記課題を解決するために、オレイン酸と
リノール酸及び／又はリノレン酸とを主成分として含む
ことを特徴とするダイカスト用油性潤滑剤組成物を提供
する。The present invention provides an oil-based lubricating composition for die-casting, which comprises oleic acid and linoleic acid and / or linolenic acid as main components in order to solve the above problems.
本発明の油性潤滑剤は、本出願人が先に特願昭63−11
582で提示したダイカスト方法に適用することを前提と
して開発されたものであり、従ってこのダイカスト方法
に用いることによって最良の効果を発揮することができ
る。しかしながら、本発明の油性潤滑剤自体は上記ダイ
カスト法による金型への適用にのみ限定されるものでは
なく、その他のダイカスト法でも有利に使用できること
が理解されるべきである。The oil-based lubricant of the present invention is disclosed in Japanese Patent Application No.
It has been developed on the premise that it is applied to the die casting method presented in 582, and therefore, the best effect can be obtained by using this die casting method. However, it should be understood that the oil-based lubricant of the present invention is not limited to the application to the die by the die casting method, but can be advantageously used in other die casting methods.
特願昭63−11582号に開示されたダイカスト方法は、
簡単に述べると、金型のキャビティに連続して形成され
た密閉加熱室で、潤滑剤を溶湯導入直前における金型表
面温度より高温に加熱し、加熱された潤滑剤の蒸気を金
型キャビティ内に導いて、金型表面に付着させ、然る後
に溶湯を金型へ導くことからなる方法である。この方法
によれば、少量の潤滑剤で複雑な形状の金型表面に満遍
なく、かつ高い生産性で潤滑を行なうことができ、しか
も製品の熱処理時の膨れも大幅に低減できる特色があ
る。The die casting method disclosed in Japanese Patent Application No. 63-11582,
Briefly, in a sealed heating chamber formed continuously in the mold cavity, the lubricant is heated to a temperature higher than the mold surface temperature immediately before the molten metal is introduced, and the heated lubricant vapor is injected into the mold cavity. And then adheres to the mold surface, and then guides the molten metal to the mold. According to this method, it is possible to lubricate the surface of a mold having a complicated shape evenly and with high productivity with a small amount of lubricant, and there is a feature that swelling during heat treatment of a product can be greatly reduced.
本発明の油性潤滑剤においてオレイン酸は、金型表面
上に被膜を形成し、金型と溶湯の接触を防ぎ、潤滑機能
を発揮する最も重要な成分である。そして、オレイン酸
は高温耐熱性に優れている。オレイン酸はリノール酸、
リノレン酸と組合せて、オレイン酸50〜90重量部に対
し、リノール酸40重量部以下、リノレン酸30重量部以下
となる量で配合される。In the oil-based lubricant of the present invention, oleic acid is the most important component that forms a film on the surface of the mold, prevents contact between the mold and the molten metal, and exerts a lubricating function. Oleic acid is excellent in high temperature heat resistance. Oleic acid is linoleic acid,
In combination with linolenic acid, it is blended in an amount of not more than 40 parts by weight of linoleic acid and not more than 30 parts by weight of linolenic acid based on 50 to 90 parts by weight of oleic acid.
リノール酸及びリノレン酸を添加すると、オレイン酸
を含む油性潤滑剤の高温潤滑性を高める効果がある。リ
ノール酸が40重量部を超えるとダイカスト製品中のガス
量が急激に増えるので、リノール酸は40重量部以下とす
る。リノレン酸が30重量部を超えると加熱体（金型外の
潤滑剤加熱手段及び金型表面）への付着現象が起きるの
で30重量部以下とする。Addition of linoleic acid and linolenic acid has the effect of increasing the high-temperature lubricity of an oil-based lubricant containing oleic acid. If the amount of linoleic acid exceeds 40 parts by weight, the amount of gas in the die-cast product increases rapidly. When the amount of linolenic acid exceeds 30 parts by weight, an adhesion phenomenon to a heating body (a lubricant heating means outside the mold and the surface of the mold) occurs, so that the amount is set to 30 parts by weight or less.
また、本発明の油性潤滑剤に脂肪酸金属塩を添加する
と、やはり、高温潤滑性が向上する効果がある。脂肪酸
金属塩が増加すると加熱体に付着するようになるので、
オレイン酸、リノール酸、リノレン酸との合計量の５重
量％以下の範囲で添加することが好ましい。In addition, when a fatty acid metal salt is added to the oil-based lubricant of the present invention, the lubricating properties at high temperatures are also improved. As the fatty acid metal salt increases, it will adhere to the heating body,
It is preferable to add oleic acid, linoleic acid, and linolenic acid in a range of 5% by weight or less based on the total amount.
本発明の油性潤滑剤を構成するために、鉱物油又は合
成油を用いる。鉱物油又は合成油は上記の潤滑成分を運
ぶ媒体とし働くものである。本発明では鉱物油又は合成
油の分子量が1000以下であることが好ましい。分子量が
1000を超えると、蒸気になるまでの時間が急激に長くな
り、ダイカスト鋳造の生産性を悪くするからである。分
子量1000以下の鉱物油又は合成油の種類は特に限定され
ず、例えば、スピンドル油系、マシン油系などが用いら
れる。Mineral oil or synthetic oil is used to constitute the oil-based lubricant of the present invention. Mineral oil or synthetic oil serves as a medium for carrying the above-mentioned lubricating components. In the present invention, the molecular weight of the mineral oil or the synthetic oil is preferably 1,000 or less. Molecular weight
If the number exceeds 1,000, the time until the steam becomes longer is sharply increased, and the productivity of die casting is deteriorated. The type of mineral oil or synthetic oil having a molecular weight of 1000 or less is not particularly limited, and for example, a spindle oil system, a machine oil system, or the like is used.
前記の如く、本発明の油性潤滑剤は、主として特願昭
63−11582号に開示したダイカスト方法で好ましく用い
られる。すなわち、加熱板に対して本発明の油性潤滑剤
を吹き付け、この時発生する蒸気を閉じた型空間へ送り
込む。これによって、キャビティ、ランナー、オーバー
フローの表面上に離型被膜が均一に形成され、連続鋳造
を可能にする。加熱板の温度は特に限定されず、ダイカ
ストの条件に応じて選択されるが、一般的には400〜600
℃の範囲の温度で使用することができる。As described above, the oil-based lubricant of the present invention is mainly
It is preferably used in the die casting method disclosed in 63-11582. That is, the oil-based lubricant of the present invention is sprayed on the heating plate, and steam generated at this time is sent to a closed mold space. As a result, a release coating is uniformly formed on the surfaces of the cavities, runners, and overflows, thereby enabling continuous casting. The temperature of the heating plate is not particularly limited and is selected according to the conditions of die casting, but is generally 400 to 600.
It can be used at temperatures in the range of ° C.
本発明の油性潤滑剤を用いれば、水溶性潤滑剤の場合
のような急冷作用が起きないので、さらに油性潤滑剤と
しても耐熱性が高く高温での型への適用が可能であるの
で、型寿命の延長が可能になる。しかも、本発明の油性
潤滑剤は、少量で型表面に均一で薄い膜を形成すること
ができるので、ダイカスト製品の金型への溶着（カジ
リ、焼きつき）、ならびに熱処理時の膨れをより少なく
することができる。そして、特願昭63−11582号に開示
した方法で用いることによって、複雑な形状の型でも、
隅々まで少量の潤滑剤で均一に潤滑剤を塗布することが
でき、溶着を完全に防止することができる。If the oil-based lubricant of the present invention is used, the quenching effect unlike the case of the water-soluble lubricant does not occur, so that the oil-based lubricant has high heat resistance and can be applied to a mold at a high temperature. The service life can be extended. In addition, the oil-based lubricant of the present invention can form a uniform and thin film on the surface of the mold with a small amount, so that the die-cast product is less likely to adhere to the mold (galling, seizure) and to be swollen during heat treatment. can do. By using the method disclosed in Japanese Patent Application No. 63-11582, even a mold having a complicated shape,
The lubricant can be uniformly applied to all corners with a small amount of lubricant, and welding can be completely prevented.
650tダイカストマシンを用い、下記条件でハイシリコ
ンアルミ合金によるコンプレッサー用サイドハウジング
の真空ダイカスト法による鋳造を行なった。Using a 650-ton die-casting machine, a side housing for a compressor made of a high silicon aluminum alloy was cast by a vacuum die-casting method under the following conditions.
溶湯温度：平均730℃ サイクルタイム:60秒 鋳造後、製品に500℃、４時間の熱処理を施した。Melt temperature: average 730 ° C Cycle time: 60 seconds After casting, the product was subjected to heat treatment at 500 ° C for 4 hours.
この実施において、本発明の潤滑剤の有効性を確認す
るために、下記の各方法で金型への潤滑剤の適用を行な
った。In this practice, in order to confirm the effectiveness of the lubricant of the present invention, the lubricant was applied to the mold by the following methods.
実施例 特願昭63−11582号に提示した装置を用いて、下記組
成の油性潤滑剤を550℃に加熱した鋼板に吹き付け、蒸
気化した潤滑剤を閉じた金型内へ送って金型の潤滑を行
なった後、常法により真空ダイカスト鋳造を行なった。Example Using an apparatus presented in Japanese Patent Application No. 63-11582, an oil-based lubricant having the following composition was sprayed on a steel sheet heated to 550 ° C., and the vaporized lubricant was fed into a closed mold to form a mold. After lubrication, vacuum die casting was performed by a conventional method.
オレイン酸 70重量部 リノール酸 20重量部 リノレン酸 10重量部 比較例１ 市販の水溶性離型剤を用い、鋳造前に金型に吹き付け
て潤滑を行なった後、常法により真空ダイカスト鋳造を
行なった。Oleic acid 70 parts by weight Linoleic acid 20 parts by weight Linolenic acid 10 parts by weight Comparative Example 1 A commercially available water-soluble release agent was used to spray and lubricate a mold before casting, and then vacuum die-casting was performed by a conventional method. Was.
比較列２ 特開昭62−156063号公報に開示した方法、すなわち、
金型の最高温度部（350℃）スプルコア上面先端付近に
市販の水溶性潤滑剤を吹き付け、熱分解された潤滑剤を
金型キャビティに送り込んで金型表面を潤滑した後、常
法により真空ガイカスト鋳造した。Comparative column 2 The method disclosed in JP-A-62-156063, that is,
The highest temperature part of the mold (350 ° C) Commercially available water-soluble lubricant is sprayed near the top end of the sprue core, and the thermally decomposed lubricant is fed into the mold cavity to lubricate the mold surface, and then vacuum gaicasting is performed in the usual way. Cast.
比較例３ 実施例と同じ方法で潤滑・鋳造したが、用いた潤滑剤
は市販のチップ潤滑剤（油性潤滑剤）を用いた。Comparative Example 3 Lubrication and casting were performed in the same manner as in Example, but a commercially available chip lubricant (oil-based lubricant) was used as a lubricant.
実施例及び各比較例において、適正潤滑剤量、鋳物内
ガス量、目視検査による膨れ、離型力、及び金型寿命の
結果をまとめて下記表に示す。In the examples and comparative examples, the following table summarizes the results of the appropriate amount of lubricant, the amount of gas in the casting, the swelling by visual inspection, the releasing force, and the mold life.
表から、実施例によれば、水溶性潤滑剤（比較例１）
の場合と比べて、ダイカスト製品内ガス量が少なく、熱
処理による膨れも減り、かつ金型寿命が２倍にも伸びて
いることが認められる。また、特開昭62−156063号公報
による潤滑剤適用の場合（比較例２）と比べても、ダイ
カスト製品の品質は同等以上であるが潤滑剤必要量は約
1/8に低減し、金型寿命が約1.5倍に伸びている。さら
に、実施例と同様の方法（特願昭63−11582号公報）で
潤滑剤を適用する場合でも従来の油性潤滑剤を用いる
と、鋳物内ガス量が多く、また膨れがわずかに発生して
いることが認められる。 From the table, according to the examples, the water-soluble lubricant (Comparative Example 1)
As compared with the case of (1), it is recognized that the gas amount in the die-casting product is small, the blister due to the heat treatment is reduced, and the life of the mold is doubled. Also, as compared with the case of applying a lubricant according to JP-A-62-156063 (Comparative Example 2), the quality of the die-cast product is equal to or higher, but the required amount of the lubricant is about
It has been reduced to 1/8, and the mold life has been extended about 1.5 times. Further, even when a lubricant is applied by the same method as that of the embodiment (Japanese Patent Application No. 63-11582), when a conventional oil-based lubricant is used, the amount of gas in the casting is large and swelling is slightly generated. Is admitted.
本発明の油性潤滑剤は高温潤滑性に優れているので、
水溶性潤滑剤を用いる場合と同様の生産性と安全性を保
持しながら、金型寿命を伸長し、かつガス取込量が少な
いので鋳物製品を熱処理しても膨れが少なく、しかも複
雑な形状の製品の金型へも満遍なく均一に潤滑すること
ができ溶着がないという効果が奏せられる。Since the oil-based lubricant of the present invention is excellent in high-temperature lubricity,
While maintaining the same productivity and safety as when a water-soluble lubricant is used, the life of the mold is extended, and the amount of gas intake is small, so there is little swelling even when heat-treating a cast product, and it has a complicated shape The lubrication can be evenly and evenly applied to the metal mold of the product and there is no welding.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹久 文隆 愛知県刈谷市昭和町１丁目１番地 日本 電装株式会社内 (72)発明者 大倉 忠雄 滋賀県大津市栗林町５番１号 日本黒鉛 工業株式会社瀬田工場内 (56)参考文献 特公 昭60−1095（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumitaka Takehisa 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside of Denso Co., Ltd. (72) Inventor Tadao Okura 5-1 Kuribayashi-cho, Otsu-shi, Shiga Japan Nippon Graphite Industrial Stock (56) References JP-B-60-1095 (JP, B2)
Claims (2)
レン酸を主成分として含み、且つ、オレイン酸50〜90重
量部、リノール酸40重量部以下及びリノレン酸30重量部
以下とからなるダイカスト用油性潤滑剤組成物。1. A die casting composition comprising oleic acid and linoleic acid and / or linolenic acid as main components and comprising 50 to 90 parts by weight of oleic acid, 40 parts by weight or less of linoleic acid and 30 parts by weight or less of linolenic acid. Oil-based lubricant composition.
ノール酸及び／又はリノレン酸との合計量を基準に５重
量％以下と、平均分子量1000以下の鉱物油又は合成油を
含む請求項１記載のダイカスト用油性潤滑剤組成物。2. The method according to claim 1, wherein the fatty acid metal salt further comprises mineral oil or synthetic oil having an average molecular weight of 1,000 or less and 5% by weight or less based on the total amount of oleic acid and linoleic acid and / or linolenic acid. Oil-based lubricant composition for die-casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1338709A JP2650451B2 (en) | 1989-12-28 | 1989-12-28 | Oil-based lubricant for die casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1338709A JP2650451B2 (en) | 1989-12-28 | 1989-12-28 | Oil-based lubricant for die casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03204135A JPH03204135A (en) | 1991-09-05 |
| JP2650451B2 true JP2650451B2 (en) | 1997-09-03 |
Family
ID=18320725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1338709A Expired - Lifetime JP2650451B2 (en) | 1989-12-28 | 1989-12-28 | Oil-based lubricant for die casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2650451B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19810032A1 (en) * | 1998-03-09 | 1999-09-16 | Acheson Ind Inc | Method and device for preparing the mold walls of a mold for primary shaping or shaping for the next molding cycle, spray element with centrifugal atomization and air guidance and use of such a spray element for spraying essentially solvent-free mold wall treatment agents |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL166653C (en) * | 1976-03-10 | 1981-09-15 | Haak Rob Van Den | ANCHOR. |
-
1989
- 1989-12-28 JP JP1338709A patent/JP2650451B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03204135A (en) | 1991-09-05 |
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