JPH0134698B2 - - Google Patents
Info
- Publication number
- JPH0134698B2 JPH0134698B2 JP59225889A JP22588984A JPH0134698B2 JP H0134698 B2 JPH0134698 B2 JP H0134698B2 JP 59225889 A JP59225889 A JP 59225889A JP 22588984 A JP22588984 A JP 22588984A JP H0134698 B2 JPH0134698 B2 JP H0134698B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mold release
- release agent
- water
- polyethylene
- 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
Links
- 239000006082 mold release agent Substances 0.000 claims description 52
- -1 polyethylene Polymers 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000004698 Polyethylene Substances 0.000 claims description 17
- 229920000573 polyethylene Polymers 0.000 claims description 17
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000004512 die casting Methods 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 4
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000000839 emulsion Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000010790 dilution Methods 0.000 description 5
- 239000012895 dilution Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 description 2
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 239000001593 sorbitan monooleate Substances 0.000 description 2
- 229940035049 sorbitan monooleate Drugs 0.000 description 2
- 235000011069 sorbitan monooleate Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000004480 active ingredient Substances 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
- 239000010775 animal oil Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/14—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for separating the pattern from the mould
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
産業上の利用分野
本発明は水溶性ダイカスト用離型剤に関する。
従来の技術
ダイカスト用離型剤は不水溶性離型剤と水溶性
離型剤とに大別されるが、不水溶性離型剤は引火
の危険や発煙による作業環境上の問題があるた
め、最近では水溶性離型剤が多用されている。水
溶性離型剤は鉱物油、動植物油脂、ワツクス、酸
化ワツクス等を水に乳化または分散させた組成の
ものが用いられている。
発明が解決しようとする問題点
ところが、水溶性離型剤は一般に不水溶性離型
剤に比べて金型への付着性がわるいために以下に
述べる問題があり、その改良が望まれている。
表面状態（鋳肌）の優れたダイカスト鋳造物を
得るためには、溶湯注入時の金型は200〜350℃に
維持されていなければならない。ところが水溶性
離型剤はこの様な高温度の金型への付着性が悪
く、均一で十分な量の被膜を形成することができ
ないため離型性に難点が生じる。そこでこの問題
を解消するために多量の離型剤をスプレーすると
水の冷却作用によつて金型を上記の温度に維持す
ることが困難になり、これが鋳肌の美しさを損う
原因となる。また、金型は多量に使用される水溶
性離型剤による冷却作用と溶湯の注入による加熱
作用を受けることにより、大きな膨張、収縮を繰
返すことになり、これが金型寿命を短縮する原因
となる。
上記の問題点に鑑み、本発明はダイカスト作業
時高温度の金型に均一によく付着して製品の仕上
り面を向上させ不良率を低減すると同時に金型の
寿命を長くするような水溶性離型剤を提供するこ
とを目的とするものである。
問題点を解決するための手段
本発明者は上記の目的を達成するために鋭意研
究の結果、平均分子量が5000以上のポリエチレン
または酸化ポリエチレンまたは酸化ポリエチレン
のカリウム塩を含有する組成物が高温度の金型へ
の付着性がよく、離型剤の性能を向上させること
を見出し本発明に到達した。（以下、酸化ポリエ
チレンまたは酸化ポリエチレンのカリウム塩を酸
化ポリエチレン等という）すなわち、本発明は、
(a)平均分子量が5000以上のポリエチレンのカリウ
ム塩、(b)界面活性剤および(c)水を必須成分として
含有し、加熱残分中に上記の(a)が10重量％以上含
有されることを特徴とする水溶性ダイカスト用離
型剤である。加熱残分の測定は、JIS K5400−
1979の８・２・１に記載の方法に準じて行なう。
すなわち、試料をはかりびんにとつて質量をはか
り、温度105〜110℃に保つた乾燥器に入れて３時
間加熱し、取り出してデシケーターの中で室温ま
で冷やしたのち、再び質量をはかつて、はかりび
んの中の残量を求める。加熱残分（％）は、次式
によつて計算する。
Ａ＝（Ｂ／Ｓ）×100
ここに Ａ：加熱残分
Ｂ：はかりびんの中の残量（ｇ）
Ｓ：試料の質量（ｇ）
である。
本発明において、ポリエチレンまたは酸化ポリ
エチレン等の平均分子量は5000以上でなければな
らない。また、ポリエチレンまたは酸化ポリエチ
レン等の量は不揮発分中10重量％以上でなければ
ならない。ポリエチレンまたは酸化ポリエチレン
等の平均分子量が5000未満であつても、量が不揮
発分中10重量％未満であつても高温度の金型への
付着性が悪く本発明の効果は得られない。
本発明の水溶性ダイカスト用離型剤は、上記の
必須成分のほかに鉱物油、油脂、脂肪酸エステ
ル、ワツクス、シリコンオイル、界面活性剤等従
来の離型剤の成分として用いられていたもの（任
意成分）を適宜混合して用いることができる。
（製造方法および使用方法）
本発明の離型剤を製造するには、ポリエチレン
または酸化ポリエチレン等の単独または前記の任
意成分との混合物に界面活性剤および水を加えて
比較的濃厚なエマルジヨンとする。
使用に際しては、上記のエマルシヨンを水で希
釈して濃度約0.1〜0.3重量％のエマルシヨンとし
て金型に塗布する。
以下実施例により本発明の効果を説明する。
実施例
実施例 １
(イ) ポリエチレンエマルシヨン
商品名 ポリエム 40
ローム・アンド・ハース社
平均分子量 18000
加熱残分 40％
(イ)50部に水50部を加え、加熱残分20％、加熱残
分中ポリエチレンの濃度87％の離型剤を組成し
た。
実施例 ２
(イ) ポリエチレンエマルシヨン
商品名 ポリエム 40
ローム・アンド・ハース社
平均分子量 18000
加熱残分 40％
(ロ) 下記の原料を混合してなるエマルシヨン
＃30モーター油 ９部
ポリオキシエチレン
ノニルフエニル
エーテル（HLB 13） ３部
ポリオキシエチレン
ノニルフエニル
エーテル（HLB ９） ３部
水 85部
(イ)20部と(ロ)80部を混合して加熱残分20％、加熱
残分中のポリエチレンの濃度35％の離型剤を組成
した。
実施例 ３
(イ) ポリエチレンラテツクス
商品名 ポリエム 40
ローム・アンド・ハース社
(ロ) 下記の原料を混合してなるエマルシヨン
ナタネ油 ５部
マシン油 ７部
ポリオキシエチレン
ノニルフエニル
エーテル（HLB 11） １部
ソルビタンモノオレート ２部
水 85部
(イ)20部と(ロ)80部を混合して加熱残分20％、加熱
残分中のポリエチレンの濃度35％の離型剤を組成
した。
実施例 ４
(イ) ポリエチレンエマルシヨン
商品名 ポリエム 20
ローム・アンド・ハース社
平均分子量 15000
加熱残分 40％
(ロ) 下記の原料を混合してなるエマルシヨン
マシン油 50部
ナタネ油 30部
ポリオキシエチレン
ノニルフエニル
エーテル（HLB 11） ８部
ソルビタンモノオレート 12部
水 566部
(イ)20部と(ロ)80部を混合して加熱残分20％、加熱
残分中のポリエチレンの濃度35％の離型剤を組成
した。
実施例 ５
(イ) 酸化ポリエチレン 10部
商品名 ACポリエチレン392
アライドケミカル社
平均分子量 8000
(ロ) マシン油 10部
(ハ) ポリオキシエチレン
ノニルフエニル
エーテル（HLB 13） ３部
(ニ) 水酸化カリウム 0.3部
(ヘ) エチレングリコール 1.5部
上記の(イ)〜(ハ)を混合して125℃まで加熱して均
一に溶解し、これに(ニ)を溶解した(ヘ)を加え均一に
混合したのち、撹拌下に95℃の熱水中に滴下して
乳化液を調整し、撹拌下に室温まで冷却して加熱
残分20％、加熱残分中の酸化ポリエチレンの濃度
43％の離型剤を組成した。
上記実施例１〜５で得られた離型剤の性能評価
試験結果を第２〜６表に示す。比較例として水溶
性離型剤Ａ〜Ｃの結果を各表に併記した。
比較例として用いた水溶性離型剤の配合を第１
表に示す。
INDUSTRIAL APPLICATION FIELD The present invention relates to a water-soluble die casting mold release agent. Conventional technology Mold release agents for die casting are broadly classified into water-insoluble mold release agents and water-soluble mold release agents, but water-insoluble mold release agents pose problems in the working environment due to the risk of ignition and smoke generation. Recently, water-soluble mold release agents have been widely used. The water-soluble mold release agent used has a composition in which mineral oil, animal or vegetable oil, wax, oxidized wax, or the like is emulsified or dispersed in water. Problems to be Solved by the Invention However, since water-soluble mold release agents generally have poor adhesion to molds compared to water-insoluble mold release agents, they have the following problems, and improvements are desired. . In order to obtain a die cast product with excellent surface condition (cast surface), the temperature of the mold must be maintained at 200 to 350°C during pouring of the molten metal. However, water-soluble mold release agents have poor adhesion to such high-temperature molds and are unable to form a uniform and sufficient amount of coating, resulting in problems in mold releasability. Therefore, if a large amount of mold release agent is sprayed to solve this problem, it becomes difficult to maintain the mold at the above temperature due to the cooling effect of water, which causes the beauty of the casting surface to deteriorate. . In addition, the mold undergoes repeated large expansion and contraction due to the cooling effect of the water-soluble mold release agent used in large quantities and the heating effect of the injection of molten metal, which shortens the life of the mold. . In view of the above problems, the present invention has developed a water-soluble release agent that adheres uniformly and well to the high-temperature mold during die-casting operations, improves the finished surface of the product, reduces the defective rate, and at the same time extends the life of the mold. The purpose is to provide a molding agent. Means for Solving the Problems In order to achieve the above object, the present inventor has conducted intensive research and found that a composition containing polyethylene or polyethylene oxide or a potassium salt of polyethylene oxide having an average molecular weight of 5000 or more can be used at high temperatures. The present invention was achieved by discovering that it has good adhesion to molds and improves the performance of the mold release agent. (Hereinafter, polyethylene oxide or potassium salt of polyethylene oxide will be referred to as polyethylene oxide etc.) That is, the present invention
Contains (a) polyethylene potassium salt with an average molecular weight of 5,000 or more, (b) a surfactant, and (c) water as essential components, and the heating residue contains 10% by weight or more of the above (a). This is a water-soluble mold release agent for die casting. Measurement of heating residue is based on JIS K5400−
It is carried out according to the method described in 8.2.1 of 1979.
That is, the sample is placed in a weighing bottle, weighed, placed in a dryer kept at a temperature of 105 to 110°C, heated for 3 hours, taken out and cooled to room temperature in a desiccator, weighed again, and weighed again. Find the amount remaining in the bottle. The heating residue (%) is calculated by the following formula. A=(B/S)×100 where A: Remaining amount after heating B: Remaining amount in the weighing bottle (g) S: Mass of the sample (g). In the present invention, the average molecular weight of polyethylene or polyethylene oxide must be 5000 or more. Furthermore, the amount of polyethylene or polyethylene oxide, etc. must be 10% by weight or more based on the nonvolatile content. Even if the average molecular weight of polyethylene or oxidized polyethylene is less than 5,000, or if the amount is less than 10% by weight based on the nonvolatile content, the adhesion to high-temperature molds is poor and the effects of the present invention cannot be obtained. In addition to the above-mentioned essential ingredients, the water-soluble mold release agent for die casting of the present invention contains mineral oils, fats and oils, fatty acid esters, waxes, silicone oils, surfactants, and other components used in conventional mold release agents ( (optional components) can be used by appropriately mixing them. (Manufacturing method and method of use) To manufacture the mold release agent of the present invention, a surfactant and water are added to polyethylene or polyethylene oxide, etc. alone or in a mixture with the above optional components to form a relatively thick emulsion. . In use, the above emulsion is diluted with water and applied to a mold as an emulsion having a concentration of about 0.1 to 0.3% by weight. The effects of the present invention will be explained below with reference to Examples. Examples Example 1 (a) Polyethylene emulsion Product name Polyem 40 Rohm and Haas Average molecular weight 18000 Residue on heating 40% (a) Add 50 parts of water to 50 parts, residue on heating 20%, residue on heating A mold release agent with a medium polyethylene concentration of 87% was prepared. Example 2 (a) Polyethylene emulsion Product name Polyem 40 Rohm & Haas Average molecular weight 18000 Residue on heating 40% (b) Emulsion made by mixing the following raw materials #30 motor oil 9 parts Polyoxyethylene nonyl phenyl ether (HLB 13) 3 parts Polyoxyethylene nonyl phenyl ether (HLB 9) 3 parts Water 85 parts (A) 20 parts and (B) 80 parts are mixed and the heating residue is 20%, and the concentration of polyethylene in the heating residue is 35. % mold release agent was formulated. Example 3 (a) Polyethylene latex Product name Polyem 40 Rohm and Haas Company (b) Emulsion made by mixing the following raw materials Rapeseed oil 5 parts Machine oil 7 parts Polyoxyethylene nonylphenyl ether (HLB 11) 1 part Sorbitan monooleate 2 parts Water 85 parts (a) 20 parts and (b) 80 parts were mixed to prepare a mold release agent with a heating residue of 20% and a polyethylene concentration of 35% in the heating residue. Example 4 (a) Polyethylene emulsion Product name Polyem 20 Rohm and Haas Average molecular weight 15000 Residue on heating 40% (b) Emulsion made by mixing the following raw materials Machine oil 50 parts Rapeseed oil 30 parts Polyoxyethylene Nonyl phenyl ether (HLB 11) 8 parts Sorbitan monooleate 12 parts Water 566 parts (A) 20 parts and (B) 80 parts were mixed and the mold was released with a heating residue of 20% and a polyethylene concentration of 35% in the heating residue. A formulation was prepared. Example 5 (a) Polyethylene oxide 10 parts Trade name AC polyethylene 392 Allied Chemical Company Average molecular weight 8000 (b) Machine oil 10 parts (c) Polyoxyethylene nonylphenyl ether (HLB 13) 3 parts (d) Potassium hydroxide 0.3 parts (f) Ethylene glycol 1.5 parts Mix (a) to (c) above and heat to 125°C to dissolve uniformly. To this, add (f) with (d) dissolved and mix uniformly, Adjust the emulsion by dropping it into hot water at 95°C while stirring, and cool it to room temperature while stirring to reduce the heating residue to 20% and the concentration of polyethylene oxide in the heating residue.
A mold release agent of 43% was formulated. The performance evaluation test results of the mold release agents obtained in Examples 1 to 5 above are shown in Tables 2 to 6. As comparative examples, the results of water-soluble mold release agents A to C are also shown in each table. The first formulation of the water-soluble mold release agent used as a comparative example
Shown in the table.
【表】【table】
【表】
比較例Ｂおよび比較例Ｃの酸化ポリエチレン
は、いずれも本発明の酸化ポリエチレンよりも平
均分子量が小さい。
（性能評価試験）
離型剤の80倍および150倍希釈水溶液について
各条件下でアルミダイカスト鋳造を行ない離型
性、鋳造物の外観（着色および光沢）について評
価した。なお、離型性の評価は離型時に、取られ
（鋳造物の金型への溶着）、歪み、擦過痕の有無を
肉眼で観察した。表示法として下記の３段階に区
分した。
表示法 〇；なし、△；僅かにあり、×；あり
（試験１）
実施例１および２を選び塗布量による性能評価
を行なつた。
試験条件
成型品；オートバイの電装品
材 質；ADC―５
（JIS H5301−1976）
型締力；150トン
金型温度；300〜350℃
シヨツト数；500
希釈濃度；150倍
結果を第２表に示す。[Table] The polyethylene oxides of Comparative Example B and Comparative Example C both have a lower average molecular weight than the polyethylene oxide of the present invention. (Performance evaluation test) Aluminum die casting was performed under various conditions using 80 times and 150 times diluted aqueous solutions of the mold release agent, and mold release properties and appearance (coloring and gloss) of the casts were evaluated. The mold releasability was evaluated by visually observing the presence or absence of cracks (adhesion of the cast material to the mold), distortion, and scratch marks during mold release. The display method was divided into the following three levels. Display method: ○: None, △: Slightly present, ×: Present (Test 1) Examples 1 and 2 were selected and performance evaluation was performed based on coating amount. Test conditions Molded product: Motorcycle electrical components Material: ADC-5 (JIS H5301-1976) Mold clamping force: 150 tons Mold temperature: 300-350℃ Number of shots: 500 Dilution concentration: 150 times Results are shown in Table 2 show.
【表】
性能を評価したところ、本発明の離型剤は優れ
た結果が得られた。また、実施例１および２は比
較例ＡおよびＢに比べ離型剤が金型に多く付着し
ていることが肉眼で観察された。塗布量を少くし
たとき（塗布時間0.5secのとき）比較例の離型剤
は金型に十分に付着せず、外観も悪かつたのに対
し、本発明の離型剤は金型に十分に付着し、離型
性、外観とも好成績を示した。塗布量を多くした
とき（塗布時間4.0secのとき）は本発明の離型剤
も比較例の離型剤もその冷却作用による金型の温
度変化が大きく、そのことによつて外観の不良を
生じた。
（試験２）
実施例３および５を選び塗布量による性能評価
を行つた。
試験条件
成形品；料理用ホツトプレート
材 質；ADC―12
型締力；650トン（自動脱型ロボツト装
備）
金型温度；250〜300℃
シヨツト数；500
希釈濃度；150倍
結果を第３表に示す。[Table] When the performance was evaluated, excellent results were obtained for the mold release agent of the present invention. Furthermore, it was observed with the naked eye that more mold release agent was attached to the mold in Examples 1 and 2 than in Comparative Examples A and B. When the amount applied was small (applying time 0.5 seconds), the mold release agent of the comparative example did not adhere to the mold sufficiently and had a poor appearance, whereas the mold release agent of the present invention did not adhere to the mold sufficiently. It showed good results in both mold releasability and appearance. When the amount of coating was increased (when the coating time was 4.0 seconds), the mold release agent of the present invention and the mold release agent of the comparative example caused a large temperature change in the mold due to the cooling effect, which caused poor appearance. occured. (Test 2) Examples 3 and 5 were selected and their performance was evaluated based on the amount of coating. Test conditions Molded product: Hot plate for cooking Material: ADC-12 Mold clamping force: 650 tons (equipped with automatic demolding robot) Mold temperature: 250-300℃ Number of shots: 500 Dilution concentration: 150 times Results are shown in Table 3 Shown below.
【表】
性能評価を行なつたところ、本発明の離型剤は
優れた結果が得られた。
また、実施例３および５は比較例ＡおよびＣに
比べ離型剤が金型に多く付着していることが肉眼
で観察された。
塗布量を少くしたとき（塗布時間0.5secのと
き）比較例の離型剤は金型に十分に付着せず、外
観も悪かつたのに対し、本発明の離型剤は金型に
十分に付着し、離型性、外観とも好成績を示し
た。塗布量を多くしたとき（塗布時間4.0secのと
き）は本発明の離型剤も比較例の離型剤もその冷
却作用による金型の温度変化が大きく、そのこと
によつて外観の不良を生じた。
（試験３）
実施例２および４を選び塗布量による性能評価
を行つた。
試験条件
成型品；釣竿用リール
材 質；ADC―12
（JIS H5301−1976）
型締力；150トン（自動脱型ロボツト装
備）
金型温度；250〜300℃
シヨツト数；500
希釈濃度；150倍
試験結果を第４表に示す。[Table] When performance was evaluated, excellent results were obtained for the mold release agent of the present invention. Furthermore, it was observed with the naked eye that more mold release agent was attached to the mold in Examples 3 and 5 than in Comparative Examples A and C. When the amount applied was small (applying time 0.5 seconds), the mold release agent of the comparative example did not adhere to the mold sufficiently and had a poor appearance, whereas the mold release agent of the present invention did not adhere to the mold sufficiently. It showed good results in both mold releasability and appearance. When the amount of coating was increased (when the coating time was 4.0 seconds), the mold release agent of the present invention and the mold release agent of the comparative example caused a large temperature change in the mold due to the cooling effect, which caused poor appearance. occured. (Test 3) Examples 2 and 4 were selected and their performance was evaluated based on the amount of coating. Test conditions Molded product: Fishing rod reel Material: ADC-12 (JIS H5301-1976) Mold clamping force: 150 tons (equipped with automatic demolding robot) Mold temperature: 250-300℃ Number of shots: 500 Dilution concentration: 150 times The test results are shown in Table 4.
【表】
性能評価を行つたところ、本発明の離型剤は優
れた結果が得られた。
また、実施例２および４は比較例ＡおよびＢに
比べ離型剤が金型に多く付着していることが肉眼
で観察された。塗布量を少くしたとき（塗布時間
0.5sec）比較例の離型剤は金型に十分に付着せ
ず、外観も悪かつたのに対し、本発明の離型剤は
金型に十分に付着し、離型性、外観とも好成績を
示した。塗布量を多くしたとき（塗布時間4.0sec
のとき）は本発明の離型剤も比較例の離型剤もそ
の冷却作用による金型の温度変化が大きく、その
ことによつて外観の不良を生じた。
（試験４）
実施例２および３を選び希釈濃度による性能評
価を行つた。
試験条件
成型品；空調機フアンカバー
材 質；ADC―12
型締力；150トン
金型温度；250〜300℃
シヨツト数；1000
塗布時間；１秒
性能評価結果を第５表に示す。[Table] When performance was evaluated, excellent results were obtained for the mold release agent of the present invention. Moreover, it was observed with the naked eye that more mold release agent was attached to the mold in Examples 2 and 4 than in Comparative Examples A and B. When applying less amount (applying time
0.5sec) The mold release agent of the comparative example did not adhere well to the mold and had a poor appearance, whereas the mold release agent of the present invention adhered sufficiently to the mold and had good results in both mold releasability and appearance. showed that. When applying a large amount (application time 4.0 seconds)
), both the mold release agent of the present invention and the mold release agent of the comparative example caused a large temperature change in the mold due to its cooling effect, which caused poor appearance. (Test 4) Examples 2 and 3 were selected for performance evaluation based on dilution concentration. Test conditions Molded product: Air conditioner fan cover Material: ADC-12 Mold clamping force: 150 tons Mold temperature: 250-300°C Number of shots: 1000 Coating time: 1 second The performance evaluation results are shown in Table 5.
【表】
試験結果によつて本発明の離型剤は比較例に比
べ良好な離型性を示すことがわかる。また、実施
例２および３は比較例ＡおよびＣに比べ離型剤が
金型に多く付着していることが肉眼で観察され
た。
（試験５）
実施例１および３を選び希釈濃度による性能評
価を行つた。
試験条件
成型品；オートバイのチエンカバー
材 質；ADC―12
型締力；500トン（自動脱型ロボツト装
備）
金型温度；250〜280℃
シヨツト数；2000
塗布時間；0.5秒
結果を第６表に示す。[Table] The test results show that the mold release agent of the present invention exhibits better mold release properties than the comparative example. Furthermore, it was observed with the naked eye that more mold release agent was attached to the mold in Examples 2 and 3 than in Comparative Examples A and C. (Test 5) Examples 1 and 3 were selected for performance evaluation based on dilution concentration. Test conditions Molded product: Motorcycle chain cover Material: ADC-12 Mold clamping force: 500 tons (equipped with automatic demolding robot) Mold temperature: 250-280℃ Number of shots: 2000 Coating time: 0.5 seconds Results are shown in Table 6 Shown below.
【表】
性能評価を行つたところ、本発明の離型剤は優
れた結果が得られた。また、実施例１および３は
比較例ＡおよびＢに比べ離型剤が金型に多く付着
していることが肉眼で観察された。
発明の効果
本発明の水溶性離型剤は金型への付着性がよ
く、従来の水溶性離型剤よりも塗布量を少なくか
つ低濃度で用いても、製品の仕上り面を向上させ
不良率を低減し金型の寿命を延長する。本発明の
作用効果は下記の原因に基づくものと考えられ
る。
ダイカスト作業時の金型の温度は通常200〜350
℃に管理されている。従来の離型剤ではこのよう
な高温の型の表面に有効な離型被膜を形成させる
ためには高濃度でかつ多量に塗布することが必要
であるのに対し、本発明の離型剤はポリエチレン
または酸化ポリエチレン等を含有するため、有効
成分全体の溶融粘度が高くなり高温表面上におい
ても脱落することなしに有効な離型被膜を形成す
る。[Table] When performance was evaluated, excellent results were obtained for the mold release agent of the present invention. Further, it was observed with the naked eye that more mold release agent was attached to the mold in Examples 1 and 3 than in Comparative Examples A and B. Effects of the Invention The water-soluble mold release agent of the present invention has good adhesion to molds, and even when used in a smaller amount and at a lower concentration than conventional water-soluble mold release agents, it can improve the finished surface of products and cause defects. Reduce mold rate and extend mold life. The effects of the present invention are believed to be based on the following causes. The temperature of the mold during die casting work is usually 200-350
It is controlled at ℃. With conventional mold release agents, it is necessary to apply them at high concentrations and in large quantities in order to form an effective mold release film on the surface of such high-temperature molds, whereas the mold release agent of the present invention Since it contains polyethylene or polyethylene oxide, etc., the melt viscosity of the active ingredient as a whole becomes high, and an effective mold release film is formed without falling off even on high-temperature surfaces.
Claims (1)
たは酸化ポリエチレンまたは酸化ポリエチレン
のカリウム塩、 (b) 界面活性剤および (c) 水 を必須成分として含有し、加熱残分中に上記の(a)
が10重量％以上含有されることを特徴とする水溶
性ダイカスト用離型剤。[Scope of Claims] 1. Contains (a) polyethylene or polyethylene oxide or potassium salt of polyethylene oxide having an average molecular weight of 5,000 or more, (b) a surfactant, and (c) water as essential components, and contains in the heating residue (a) above
A water-soluble die casting mold release agent characterized by containing 10% by weight or more of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22588984A JPS61103642A (en) | 1984-10-29 | 1984-10-29 | Water soluble parting agent for die casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22588984A JPS61103642A (en) | 1984-10-29 | 1984-10-29 | Water soluble parting agent for die casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61103642A JPS61103642A (en) | 1986-05-22 |
| JPH0134698B2 true JPH0134698B2 (en) | 1989-07-20 |
Family
ID=16836456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22588984A Granted JPS61103642A (en) | 1984-10-29 | 1984-10-29 | Water soluble parting agent for die casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61103642A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1336445A1 (en) * | 2002-02-19 | 2003-08-20 | Alcan Technology & Management AG | Pressure die-casting machine and process for lubricating the injection piston |
| JP3960951B2 (en) * | 2003-06-18 | 2007-08-15 | トヨタ自動車株式会社 | Evaluation method of die casting mold release agent or lubricant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131213A (en) * | 1984-07-23 | 1986-02-13 | Yuuhoo Chem Kk | Composition of mold lubricant |
-
1984
- 1984-10-29 JP JP22588984A patent/JPS61103642A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131213A (en) * | 1984-07-23 | 1986-02-13 | Yuuhoo Chem Kk | Composition of mold lubricant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61103642A (en) | 1986-05-22 |
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