JP2941311B2 - Casting method for synthetic resin - Google Patents
Casting method for synthetic resinInfo
- Publication number
- JP2941311B2 JP2941311B2 JP1251846A JP25184689A JP2941311B2 JP 2941311 B2 JP2941311 B2 JP 2941311B2 JP 1251846 A JP1251846 A JP 1251846A JP 25184689 A JP25184689 A JP 25184689A JP 2941311 B2 JP2941311 B2 JP 2941311B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- casting
- ultraviolet
- monomer
- curing
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
- B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/40—Plastics, e.g. foam or rubber
- B29C33/405—Elastomers, e.g. rubber
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は注型方法に係り、特に紫外線硬化型液状樹脂
を利用しての注型方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a casting method, and more particularly to a casting method using an ultraviolet-curable liquid resin.
（従来技術） 従来からマスターを基にRTVシリコーンゴムにより型
取りしたシリコーンゴム型のキャビティに液状合成樹脂
を注入硬化させ成形品を得る注型法が開発されている。(Prior art) Conventionally, a casting method has been developed in which a liquid synthetic resin is injected and cured into a cavity of a silicone rubber mold molded with RTV silicone rubber based on a master to obtain a molded product.
注型法による部品の成形は、型の製作を短時日に低コ
ストでできることから、多品種少量生産や試作品の成形
の分野で広く普及してきている。Molding of parts by the casting method has become widespread in the field of high-mix low-volume production and molding of prototypes because the production of molds can be done in a short time at low cost.
従来の注型法に利用されている合成樹脂は、主剤と硬
化剤とより成る２液型のポリウレタン樹脂やエポキシ樹
脂であった。また最近は、ゴム型をマスターを透明ゴム
で型取りした透明ゴム型とし、注型用の合成樹脂として
紫外線硬化型液状樹脂を利用する場合もあるようになっ
た。The synthetic resin used in the conventional casting method is a two-pack type polyurethane resin or epoxy resin composed of a main agent and a curing agent. Recently, there has been a case where a rubber mold is a transparent rubber mold obtained by molding a master with a transparent rubber, and an ultraviolet curable liquid resin is used as a synthetic resin for casting.
（発明が解決しようとする課題） 従来の２液型合成樹脂を利用しての注型の場合には、
２液の混合時に樹脂液中に空気が混入するので混合を真
空中で行わなければならなく、また２液混合により急速
に硬化反応が進むので可使時間が短く、注型作業も素早
く行うことが必要であった。(Problems to be solved by the invention) In the case of casting using a conventional two-component synthetic resin,
When mixing two liquids, air must be mixed in the resin liquid, so that the mixing must be performed in a vacuum. In addition, since the curing reaction proceeds rapidly due to the mixing of the two liquids, the pot life is short, and the casting operation must be performed quickly. Was needed.
さらに、２液型合成樹脂で注型を行った場合、硬化速
度の早い樹脂を利用しても注型後60℃−１〜２時間の加
熱硬化を行わないと完全硬化せず成形品を型から取り出
すことはできない。In addition, when casting with a two-component synthetic resin, even if a resin with a high curing speed is used, the molded product will not be completely cured unless heated and cured at 60 ° C. for 1 to 2 hours after casting. Cannot be removed from
このため少し多量（50〜100個程度）の成形品を得よ
うとすると型を多数用意しない限り、総ての成形品を得
るまでにはかなりの時間がかかることとなる。また紫外
線硬化型液状樹脂を利用しての注型の場合には、樹脂液
が１液型なので可使時間の心配がなく作業性は良くな
る。しかしながら従来の紫外線硬化型液状樹脂は、塗
料、インク、接着剤用等に開発されたもので、注型には
殆ど適さなかった。すなわち従来の紫外線硬化型液状樹
脂は、粘度が高く注型性が悪く、注型性を高めるために
希釈剤で希釈し粘度を下げていた。これにより、硬化性
が下がり硬化に10〜30分程度とかなり時間が掛かるよう
になり、さらに肉厚品は硬化できず、成形収縮が大き
く、成形品の外観品質が低下するだけでなく物性も低下
する等の多くの欠点が生じ、実用化は難しかった。For this reason, when trying to obtain a small amount (about 50 to 100) of molded products, it takes a considerable time to obtain all the molded products unless a large number of molds are prepared. In the case of casting using a UV-curable liquid resin, since the resin liquid is a one-liquid type, there is no need to worry about the pot life and the workability is improved. However, conventional UV-curable liquid resins have been developed for paints, inks, adhesives, and the like, and are hardly suitable for casting. That is, the conventional ultraviolet curable liquid resin has a high viscosity and poor castability, and is diluted with a diluent to decrease the viscosity in order to enhance the castability. As a result, the curability decreases and it takes a considerable time for about 10 to 30 minutes to cure, and furthermore, thick products cannot be cured, molding shrinkage is large, not only the appearance quality of the molded product is reduced, but also the physical properties Many drawbacks such as lowering occurred, and it was difficult to put it to practical use.
本発明は前記したような従来技術の欠点を解消するた
め１液型でしかも速硬化性の合成樹脂による注型につい
て検討を重ねた結果創案されたものである。The present invention was created as a result of repeated studies on casting with a one-pack type and fast-curing synthetic resin in order to solve the above-mentioned drawbacks of the prior art.
（課題を解決するための手段） すなわち本発明は、マスターを型取りした透明シリコ
ーンゴム型のキャビティ内に紫外線硬化型液状樹脂を注
入し紫外線照射によりに硬化さる合成樹脂の注型方法に
おいて、前記紫外線硬化型液状樹脂が、モノマーをビス
フェノールＡエチレンオキサイド付加物のジアクリレー
トとフェニルグリシジルエーテルのアクリル酸エステル
との混合物とし、光重合開始剤を２−ベンジル−２−ジ
メチルアミノ−１−（４−モルホリノフェニル）−ブタ
ン−１とする組成物であであることを特徴とする合成樹
脂の注型方法である。(Means for Solving the Problems) That is, the present invention relates to a method of casting a synthetic resin, in which an ultraviolet-curable liquid resin is injected into a cavity of a transparent silicone rubber mold having a master and is cured by ultraviolet irradiation. The ultraviolet-curable liquid resin is a mixture of a diacrylate of bisphenol A ethylene oxide adduct and an acrylate of phenylglycidyl ether, and the photopolymerization initiator is 2-benzyl-2-dimethylamino-1- (4- (Morpholinophenyl) -butane-1 is a method for casting a synthetic resin.
（作用） 本発明は前記したように構成され、その作用は注型用
に利用する合成樹脂液として紫外線硬化型を利用するの
で樹脂液は１液型であって混合作業に必要な可使時間を
心配する必要がなくなる。さらに利用する紫外線硬化型
液状樹脂は、粘度が低く特に注型に適したものであるの
で、従来の紫外線硬化型液状樹脂の場合のように注型性
を高めるために希釈剤で希釈する必要がなく、持ってい
る硬化性、成形収縮性、物性等のすぐれた特性をそのま
ま生かしながら注型できる。これにより、肉厚であって
も５分以下程度の極めて短時間で紫外線硬化でき、成形
収縮が殆ど生じないので外観品質が極めて良好で、しか
も物性にもすぐれ、十分実用に耐えられる成形品が容易
に得られようになる。(Function) The present invention is configured as described above, and its function is to use an ultraviolet curing type as a synthetic resin liquid used for casting, so that the resin liquid is a one-part resin liquid, and the working time required for the mixing operation is used. No need to worry about. Further, since the ultraviolet curing liquid resin to be used has a low viscosity and is particularly suitable for casting, it is necessary to dilute with a diluent in order to enhance the casting property as in the case of the conventional ultraviolet curing liquid resin. In addition, casting can be performed while taking advantage of its excellent properties such as curability, molding shrinkage, and physical properties. This makes it possible to cure the ultraviolet ray in a very short time of about 5 minutes or less even if the thickness is large, and to produce a molded article which has very good appearance quality and excellent physical properties because of almost no molding shrinkage, and which can withstand practical use sufficiently. It can be easily obtained.
（実施例） 紫外線硬化型合成樹脂は、その硬化機構によりラジカ
ル重合系とカチオン重合系とに大別される。(Examples) Ultraviolet curing type synthetic resins are roughly classified into radical polymerization type and cationic polymerization type according to their curing mechanism.
現在紫外線硬化型合成樹脂が実用化されているのは、
塗料、インク、接着剤、画像材料の分野であり、ここで
利用されているのは、主に（メタ）アクリル系モノマー
のラジカル重合を利用したものであり、この代表的なも
のとしてはエポキシ樹脂とアクリル酸との付加反応物で
あるエポキシアクリレート（ビスフェノールＡ型ビニル
エステル、商品名リポキシ［昭和高分子］）が挙げられ
る。Currently, UV curable synthetic resins are being put to practical use.
In the fields of paints, inks, adhesives, and imaging materials, the ones that are mainly used here are those that use radical polymerization of (meth) acrylic monomers. Epoxy acrylate (bisphenol A type vinyl ester, trade name: Lipoxy [Showa Kobunshi]) which is an addition reaction product of acrylonitrile and acrylic acid.
この合成樹脂は耐薬品性、硬化性、耐熱性等はすぐれ
ているものの、粘度が高く注型が難しく注型性を高める
ため各種重合成モノマーや反応性希釈剤を加えて粘度を
下げると硬化性が下がって肉厚の厚いものの硬化ができ
なくなり、さらに成形収縮が大きくなって良好な注型品
が得られなかった。Although this synthetic resin has excellent chemical resistance, curability, heat resistance, etc., it has high viscosity and is difficult to cast, so it is hardened by adding various polysynthetic monomers and reactive diluents to lower the viscosity. However, hardening could not be performed even though the wall thickness was large, and the molding shrinkage was large, so that a good cast product could not be obtained.
また、カチオン重合系合成樹脂は、酸素により硬化が
阻害されなかったり、成形収縮率が低いといったような
利点があるものの、硬化の際にN2等のガスが発生するの
で、肉厚の成形品の場合内部に気泡が含まれた状態とな
ってしまうので注型用には適していなかった。Also, cationic polymerization synthetic resin, although may not cure is inhibited by oxygen, molding shrinkage has the advantage such as low, the gas such as N 2 upon curing occurs, thick molded articles In the case of (1), air bubbles were contained inside, so that it was not suitable for casting.
このような状況から先ず注型に適した紫外線硬化型合
成樹脂の選定に関する検討を行い、ビスフェノールＡの
エチレンオキサイド付加物のアクリレート（以降モノマ
ーＩと呼ぶ）が800〜1400CPSと比較的低粘度で硬化性も
良く肉厚品も均一に硬化し、しかも成形収縮率が低く耐
熱性や硬度もすぐれた注型に適した合成樹脂であること
を見出した。Under these circumstances, we first examined the selection of UV-curable synthetic resin suitable for casting, and cured the acrylate of bisphenol A ethylene oxide adduct (hereafter referred to as monomer I) with a relatively low viscosity of 800-1400 CPS. It has been found that it is a synthetic resin which is excellent in heat resistance, cures thick-walled products uniformly, has a low molding shrinkage ratio, and has excellent heat resistance and hardness and is suitable for casting.
このような合成樹脂の具体例としては次のようなもの
を挙げることができる。Specific examples of such a synthetic resin include the following.
このようなモノマーＩの紫外線硬化による注型物は柔
軟性、伸び、じん性の点で不十分であるので、モノマー
Ｉに配合しこれらの物性を改良するモノマーについて検
討した。 Such a cast product obtained by curing the monomer I by ultraviolet curing is insufficient in flexibility, elongation, and toughness. Therefore, a monomer which is blended with the monomer I to improve these properties was studied.
その結果、フェニルグリシジルエーテルのアクリル酸
エステル（以降モノマーIIと呼ぶ）は、モノマーＩに良
く相容し前記した物性の改良に効果があるとともに、粘
度は150CPSと低く硬化性にすぐれまた成形収縮率も低い
といった特性により注型用樹脂としての特性にもすぐれ
ていることを見出した。As a result, the acrylate ester of phenylglycidyl ether (hereinafter referred to as monomer II) is well compatible with monomer I and has the effect of improving the above-mentioned physical properties, and has a low viscosity of 150 CPS, excellent curability, and a high molding shrinkage. It is also found that the resin has excellent properties as a casting resin because of its low properties.
このモノマーIIの具体的例としては次のものを挙げる
ことができる。Specific examples of the monomer II include the following.
次に前記したモノマーに対する光重合開始剤の検討と
して、２−ベンジル−２−ジメチルアミノ−１−（４−
モルホリノフェニル）−ブタン−１（以降開始剤Ａと呼
ぶ）と、 １−ヒドロキシシクロヘキシルフェニルケトン（以降開
始剤Ｂと呼ぶ） との比較を行った。 Next, as a study of the photopolymerization initiator for the monomer described above, 2-benzyl-2-dimethylamino-1- (4-
Morpholinophenyl) -butane-1 (hereinafter referred to as initiator A); 1-hydroxycyclohexyl phenyl ketone (hereinafter referred to as initiator B) Was compared.
紫外線硬化型合成樹脂としてモノマーＩのKAYARAD R5
51を用い、4KW・80W/cm（高圧水銀灯）、高さ21cm、１
分間照射の照射条件で紫外線硬化を行い光重合開始剤濃
度と硬化深さとの関係を検討した結果は第１図に示す通
りである。KAYARAD R5 of monomer I as a UV-curable synthetic resin
Using 51, 4KW, 80W / cm (high pressure mercury lamp), height 21cm, 1
FIG. 1 shows the results of examining the relationship between the photopolymerization initiator concentration and the curing depth by performing ultraviolet curing under irradiation conditions of minute irradiation.
この結果によると開始剤Ａの方が開始剤Ｂに比べては
るかに効果的であり、濃度としてはここでは図示しない
が濃度と物性との関係も考えて、0.5〜２重量％とする
ことが好ましいことが解った。According to the results, the initiator A is much more effective than the initiator B. The concentration is not shown here, but may be 0.5 to 2% by weight in consideration of the relationship between the concentration and physical properties. I found it favorable.
次にモノマーＩに対するモノマーIIの配合比を時々変
え、開始剤の種類も変えた場合の硬化物の物性を検討し
た結果を第２図〜第６図に示す。Next, FIG. 2 to FIG. 6 show the results of examining the physical properties of the cured product when the mixing ratio of the monomer II to the monomer I was changed from time to time and the type of the initiator was also changed.
この結果によるとモノマーＩに対してモノマーIIを配
合したことにより衝撃強度及び伸びが改良され、引張り
強度、曲げ強度及び硬度は低下する傾向にあり、このよ
うな結果から配合比は重量比で9:1〜6:4程度の範囲が好
ましいことが解るとともに、衝撃強度の向上には開始剤
Ａの配合が好ましいことが解った。According to the results, the impact strength and elongation were improved by blending the monomer II with the monomer I, and the tensile strength, the bending strength and the hardness tended to decrease. From these results, the blending ratio was 9% by weight. : 1 to 6: 4 was found to be preferable, and the addition of initiator A was found to be preferable for improving the impact strength.
尚前記検討における試験条件は、モノマーＩとしては
KAYARAD R551を用い、モノマーII及び開始剤A,Bは先に
例として挙げた製品を用い、ダンベル状の試験片を4KW
・80W/cm、高圧水銀灯、高さ21cm、２分照射の条件で硬
化させた。The test conditions in the above examination were as follows:
Using KAYARAD R551, the monomer II and the initiators A and B were the same as the products listed above, and the dumbbell-shaped test piece was 4 KW.
Curing was performed under the conditions of 80 W / cm, a high-pressure mercury lamp, a height of 21 cm, and irradiation for 2 minutes.
光重合開始剤をモノマーに加熱溶解させる際にモノマ
ーが熱によって重合するのを防ぐために重合禁止剤の配
合が必要であり、これは通常使用される重合禁止剤のい
ずれを用いても良く、例えばハイドロキノンモノメチル
エーテルを100〜200PPMの範囲で配合することが好まし
い。When dissolving the photopolymerization initiator in the monomer by heating, it is necessary to add a polymerization inhibitor in order to prevent the monomer from being polymerized by heat, and this may be any of commonly used polymerization inhibitors, for example, It is preferable to mix hydroquinone monomethyl ether in the range of 100 to 200 PPM.
また、紫外線硬化型合成樹脂による注型の場合、型の
キャビティ内への樹脂の完全な注入を行うため10mmHg程
度の真空度での注入を行うので、成形物への気泡の混入
を防ぐには合成樹脂液中の水分含有量は0.05重量％以下
とする必要がある。In addition, in the case of casting with a UV-curable synthetic resin, injection is performed at a degree of vacuum of about 10 mmHg in order to completely inject the resin into the cavity of the mold, so that bubbles are not mixed into the molded product. The water content in the synthetic resin liquid needs to be 0.05% by weight or less.
このため合成樹脂液の配合に際して、モノマー中に光
重合開始剤、重合禁止剤等を所定量配合し、加熱処理剤
の吸湿剤（例えばバイエル社製のバイリット）を入れた
多孔質の袋を入れ、40〜60℃にて５分程度攪拌混合後、
30分間10mmHg以上の真空度に保ち脱水させ、その後室温
まで冷却すると合成樹脂液中の水分量は0.05重量％以下
となる。Therefore, at the time of compounding the synthetic resin liquid, a predetermined amount of a photopolymerization initiator, a polymerization inhibitor, and the like are mixed in the monomer, and a porous bag filled with a heat-absorbing agent (for example, Bayrit made by Bayer) is placed. After stirring and mixing at 40-60 ° C for about 5 minutes,
When dewatering is performed for 30 minutes while maintaining a vacuum of 10 mmHg or more, and then cooled to room temperature, the water content in the synthetic resin liquid becomes 0.05% by weight or less.
注型に利用する型はマスターの転写性にすぐれしかも
複雑形状の成形品の離型を容易に行わせるために透明な
RTVシリコーンゴムにより形成することが好ましい。The mold used for casting has excellent transferability of the master, and is transparent to facilitate the release of complicated shaped products.
It is preferably formed of RTV silicone rubber.
透明なRTVシリコーンゴムとしては例えばトーレシリ
コーン（株）のCX52−084が、透明度も良く硬さJISA4
5、引張強さ48kg/cm2、伸び320％、引き裂き強さJISA11
kg/cmと注型用の型材としては十分な物質を持ってい
た。As a transparent RTV silicone rubber, for example, CX52-084 from Toray Silicone Co., Ltd. has good transparency and hardness JISA4
5, the tensile strength of 48 kg / cm 2, elongation 320%, tear strength JISA11
kg / cm, which had enough material for casting.
合成樹脂液の紫外線硬化は波長2000〜8000Aの紫外線
で行われ、このような紫外線を発するランプとしては低
圧又は高圧水銀灯、メタルハライドランプ、キセノンラ
ンプ等があるが、高圧水銀灯又はメタルハライドランプ
を利用すると、硬化効率が良く肉厚成形物も短時間に硬
化させることができる。The ultraviolet curing of the synthetic resin liquid is performed with ultraviolet light having a wavelength of 2000 to 8000 A, and low-pressure or high-pressure mercury lamps, metal halide lamps, xenon lamps, and the like are available as lamps that emit such ultraviolet light.If a high-pressure mercury lamp or metal halide lamp is used, The curing efficiency is good and a thick molded product can be cured in a short time.
以上のような各種検討結果にもとづいて、実際に紫外
線硬化により成形を行った例を次に示す。An example in which molding is actually performed by ultraviolet curing based on the results of the various studies described above will be described below.
実施例１ ・合成樹脂液 モノマーＩ（KAYARAD R551） 90g モノマーII 10g 開始剤Ａ 1g 重合禁止剤（ハイドロキノンモノメチルエーテル） 100PPM ・ゴム型 厚さ3mmのダンベル試験片形状を型取りした肉厚300mmの
透明シリコーンゴム型 ・合成樹脂液の注入 10mmHgの真空度で真空注入 ・硬化 80W/cm強度の高圧水銀灯下で２分 ・結果 表面のべとつきやクラックの発生の無い良好な硬化物
が得られた。Example 1-Synthetic resin liquid Monomer I (KAYARAD R551) 90 g Monomer II 10 g Initiator A 1 g Polymerization inhibitor (hydroquinone monomethyl ether) 100 PPM-Rubber mold Transparent 300 mm thick dumbbell specimen with 3 mm thickness Silicone rubber mold ・ Injection of synthetic resin solution Vacuum injection at a degree of vacuum of 10 mmHg ・ Curing 2 minutes under high pressure mercury lamp with 80 W / cm strength ・ Result A good cured product with no stickiness or cracks on the surface was obtained.
実施例２ ・合成樹脂液 モノマーＩ（KAYARADR551） 140g モノマーII 60g 開始剤Ａ 2g 重合禁止剤（ハイドロキノンモノメチルエーテル） 100PPM ・ゴム型 第７図に示すような155×85×40mmの大きさで厚さmax3m
mのミシン部品としての回路ケースを型取りした厚さmax
60mmの透明シリコーンゴム型。Example 2 Synthetic resin liquid Monomer I (KAYARADR551) 140 g Monomer II 60 g Initiator A 2 g Polymerization inhibitor (hydroquinone monomethyl ether) 100 PPM Rubber type 155 x 85 x 40 mm as shown in Fig. 7 and thickness max3m
The thickness max of the circuit case as a sewing machine part of m
60mm transparent silicone rubber mold.
・合成樹脂液の注入及び硬化 後で説明する第８図に示す紫外線照射型真空注入装置
により行った。-Injection and curing of synthetic resin liquid This was performed by an ultraviolet irradiation type vacuum injection device shown in Fig. 8 described later.
・結果 成形物は良好な硬化状態で得られ、この成形物に２液
型のアクリルウレタン塗料（日本ペイント、maxスペリ
オ）で塗装を行い60℃−30分の加熱により密着良好な塗
膜が得られた。またシリコーンゴム型は紫外線照射によ
り次第に黄変していくが、50〜100個程度の成形には何
ら支障はなかった。・ Result The molded product is obtained in a good cured state. This molded product is coated with a two-pack type acrylic urethane paint (Nippon Paint, max Superior), and a coating film with good adhesion is obtained by heating at 60 ° C. for 30 minutes. Was done. The silicone rubber mold gradually turned yellow by irradiation with ultraviolet light, but there was no problem in molding about 50 to 100 pieces.
第８図に示す紫外線照射型真空注入装置について説明
すると、１が排気口12を持ち内面に反射板２を貼った真
空箱であり、この真空箱１には回転及び上下動自在の軸
４を持つ型載置台３と、回転及び左右方向に摺動自在の
軸６を持つポリカップ取付台５とが配備され、壁の一面
には光透過窓７が設けられている。Referring to the ultraviolet irradiation type vacuum injection apparatus shown in FIG. 8, reference numeral 1 denotes a vacuum box having an exhaust port 12 and a reflective plate 2 adhered to the inner surface thereof. A mold mounting table 3 is provided, and a polycup mounting table 5 having a shaft 6 that is rotatable and slidable in the left-right direction is provided, and a light transmission window 7 is provided on one surface of the wall.
８は真空箱１に隣接した紫外線発生室で室内に紫外線
反射用のコールドミラー10で覆われた高圧水銀灯９が配
備され、真空箱１の光透過窓７と対向する壁に紫外線の
真空箱１に対する照射を開閉するためのシャッター11が
設けられている。Reference numeral 8 denotes an ultraviolet ray generation chamber adjacent to the vacuum box 1, in which a high-pressure mercury lamp 9 covered with a cold mirror 10 for reflecting ultraviolet light is provided. Is provided with a shutter 11 for opening and closing irradiation with respect to.
18は紫外線照射室８内の排気と高圧水銀灯９を冷却す
るための排気口であり、19が吸気口であり、13は真空箱
１の排気口12を開閉するための真空ポンプ（図示せず）
に接続する排気管中に設けられた真空開閉弁である。Reference numeral 18 denotes an exhaust port for cooling the exhaust in the ultraviolet irradiation chamber 8 and the high-pressure mercury lamp 9, reference numeral 19 denotes an intake port, and reference numeral 13 denotes a vacuum pump (not shown) for opening and closing the exhaust port 12 of the vacuum box 1. )
Is a vacuum on-off valve provided in an exhaust pipe connected to.
以上のように構成される装置を利用しての合成樹脂液
の注入及び硬化作業は次のように行う。The operation of injecting and curing the synthetic resin liquid using the apparatus configured as described above is performed as follows.
先ず、合成樹脂液17を計量したポリカップ16をポリカ
ップ取付台５に取り付けるとともに、型載置台３に注入
口15を取り付けた透明シリコーンゴム型14を載置した状
態で真空箱１を閉じる。First, the vacuum cup 1 is closed in a state where the polycup 16 having the synthetic resin liquid 17 measured is mounted on the polycup mounting base 5 and the transparent silicone rubber die 14 having the injection port 15 mounted on the die mounting base 3 is mounted.
次に、型載置台３を上下させて透明シリコーンゴム型
14が高圧水銀灯９に対向する高さとなるように位置合せ
するとともに、ポリカップ取付台５も左右に摺動させて
透明シリコーンゴム型14の注入口15に対して位置合わせ
をする。Next, the mold mounting table 3 is moved up and down to set the transparent silicone rubber mold.
The position is adjusted so that 14 is at a height facing the high-pressure mercury lamp 9, and the polycup mounting base 5 is also slid left and right to align with the injection port 15 of the transparent silicone rubber mold 14.
その後、真空開閉弁13を開いて真空箱１内を10mmHg程
度の真空度にするとともにポリカップ取付台５を回動さ
せ、合成樹脂液17を注入口15を介して透明シリコーンゴ
ム型14のキャビティ内に注入し、その後真空箱１内に常
圧に戻す。After that, the vacuum opening / closing valve 13 is opened to evacuate the inside of the vacuum box 1 to a degree of vacuum of about 10 mmHg, and at the same time, the polycup mounting base 5 is rotated. And then return to normal pressure in the vacuum box 1.
最後にシャッター11を開いて高圧水銀灯９からの紫外
線を型載置台３の回転により回転している透明シリコー
ンゴム型14に４分程度照射してキャビティ内に注入され
た合成樹脂液17の硬化を行わせ、作業を終了する。Finally, the shutter 11 is opened, and ultraviolet light from the high-pressure mercury lamp 9 is irradiated on the transparent silicone rubber mold 14 rotating by the rotation of the mold mounting table 3 for about 4 minutes to cure the synthetic resin liquid 17 injected into the cavity. To complete the work.
（効果） 本発明は以上のような構成及び作用のものであるが、
この効果は第９図に示される２液型合成樹脂を熱硬化す
る従来法との作業工程の比較により明らかとなる。(Effects) The present invention has the above configuration and operation,
This effect is evident from the comparison of the working process with the conventional method of thermosetting a two-pack type synthetic resin shown in FIG.
すなわち、従来法においては気泡の混入のない成形物
を得るために絶えず作業を真空中で行わなければなら
ず、しかも２液混合後は硬化反応が進んでいるのでこれ
を短時間で効果的に行う必要があったが、本発明の紫外
線硬化法では全くこのようなことを考える必要がなく作
業工程は極めて単純である。That is, in the conventional method, in order to obtain a molded product free of air bubbles, the work must be constantly performed in a vacuum, and after the two-liquid mixing, the curing reaction is progressing, so that this can be effectively performed in a short time. Although it was necessary to carry out the method, the ultraviolet curing method of the present invention does not require such considerations at all, and the working process is extremely simple.
また硬化時間は、肉厚であっても５分以下程度であ
り、１〜２時間を要した２液型合成樹脂を熱硬化する場
合と比べれば勿論のこと、薄肉でも10〜30分も要する従
来の紫外線硬化型液状樹脂を利用した場合と比べても大
幅に短縮される。さらに成形品の外観や物性等の品質
は、形状や肉厚が如何なるものであっても、従来の紫外
線硬化型液状樹脂を利用した場合に比べて極めてすぐ
れ、２液型合成樹脂を利用した場合と比べても遜色がな
く、十分実用に耐えられるものである。The curing time is about 5 minutes or less even for a thick wall, and it takes 10 to 30 minutes for a thin wall, of course, as compared with the case where a two-pack synthetic resin requires 1 to 2 hours. This is greatly reduced as compared with the case where a conventional ultraviolet curable liquid resin is used. Furthermore, the quality of the appearance and physical properties of the molded product is extremely superior to that of the conventional UV-curable liquid resin, no matter what the shape and thickness, and when the two-component synthetic resin is used. There is no inferiority to that of the above, and it is sufficiently practical.
以上のように本発明は、極めて効率的に合成樹脂の成
形を行うことのできる注型法を提供し、試作品の形成や
多品種少量生産に多大の効果を与える。As described above, the present invention provides a casting method capable of extremely efficiently molding a synthetic resin, and has a great effect on the formation of prototypes and small-lot production of many kinds.
第１図は本発明の光重合開始剤の硬化性を示す図、第２
〜第６図は本発明の合成樹脂液の配合と物性との関係を
示す図で、第２図は衝撃強度、第３図は引張り強度、第
４図は伸び、第５図は硬度、第６図は曲げ強度を示し、
第７図は紫外線硬化成形物の斜視図、第８図は紫外線硬
化注入装置を示す図、第９図は従来法と本発明との作業
工程を比較する図である。FIG. 1 is a diagram showing the curability of the photopolymerization initiator of the present invention.
6 to 6 show the relationship between the composition of the synthetic resin liquid of the present invention and the physical properties. FIG. 2 shows impact strength, FIG. 3 shows tensile strength, FIG. 4 shows elongation, FIG. Figure 6 shows the bending strength,
FIG. 7 is a perspective view of an ultraviolet-cured molded product, FIG. 8 is a diagram showing an ultraviolet-curing injection device, and FIG. 9 is a diagram comparing working steps between the conventional method and the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｋ 105:24 (56)参考文献 特開 昭58−80587（ＪＰ，Ａ) 特開 昭60−25710（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 39/02 B29C 39/26 - 39/34 B29C 33/38 - 33/40 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 6 Identification symbol FI B29K 105: 24 (56) References JP-A-58-80587 (JP, A) JP-A-60-25710 (JP, A) ( 58) Field surveyed (Int. Cl. 6 , DB name) B29C 39/02 B29C 39/26-39/34 B29C 33/38-33/40
Claims (1)
型のキャビティ内に紫外線硬化型液状樹脂を注入し紫外
線照射によりに硬化させる合成樹脂の注型方法におい
て、前記紫外線硬化型液状樹脂が、モノマーをビスフェ
ノールＡエチレンオキサイド付加物のジアクリレートと
フェニルグリシジルエーテルのアクリル酸エステルとの
混合物とし、光重合開始剤を２−ベンジル−２−ジメチ
ルアミノ−１−（４−モルホリノフェニル）−ブタン−
１とする組成物であることを特徴とする合成樹脂の注型
方法。1. A method of casting a synthetic resin in which an ultraviolet-curable liquid resin is injected into a cavity of a transparent silicone rubber mold in which a master is cast and cured by irradiation with ultraviolet light, wherein the ultraviolet-curable liquid resin comprises a monomer. A mixture of a diacrylate of bisphenol A ethylene oxide adduct and an acrylate of phenylglycidyl ether was used, and the photopolymerization initiator was 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane-
A method for casting a synthetic resin, wherein the composition is a composition as described in 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251846A JP2941311B2 (en) | 1989-09-29 | 1989-09-29 | Casting method for synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251846A JP2941311B2 (en) | 1989-09-29 | 1989-09-29 | Casting method for synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03114711A JPH03114711A (en) | 1991-05-15 |
| JP2941311B2 true JP2941311B2 (en) | 1999-08-25 |
Family
ID=17228789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1251846A Expired - Fee Related JP2941311B2 (en) | 1989-09-29 | 1989-09-29 | Casting method for synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2941311B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2713977A1 (en) * | 1993-12-20 | 1995-06-23 | First Materiels Equipements Sa | Polymethylmethacrylate moulding of objects, e.g. busts or effigies |
| DE69725380T2 (en) * | 1996-05-16 | 2004-08-26 | Teijin Seiki Co. Ltd. | Light curable composition, process for producing a light cured molded article, mold and process for vacuum die casting and urethane acrylate |
| SG55351A1 (en) * | 1996-07-17 | 1998-12-21 | Asahi Chemical Ind | Photosensitive resin composition for photocast-molding |
| JP3772243B2 (en) | 1996-09-25 | 2006-05-10 | 湘南デザイン株式会社 | Molding method of duplicate product |
| JP3417230B2 (en) * | 1996-09-25 | 2003-06-16 | 信越化学工業株式会社 | Photocurable liquid silicone rubber composition for mold making |
| JPH10119066A (en) * | 1996-10-24 | 1998-05-12 | Shonan Design Kk | Vacuum cast molding machine |
| SG65682A1 (en) | 1997-01-31 | 1999-06-22 | Shonan Design Co Ltd | Form for manufacturing resin mold and clamping jig for resin mold |
| WO2008051031A1 (en) * | 2006-10-27 | 2008-05-02 | Lg Chem, Ltd. | Method of manufacturing seamless silicon roll having pattern and seamless silicon roll produced by the same |
| JP5796461B2 (en) * | 2010-11-23 | 2015-10-21 | Jsr株式会社 | Rubber mold for light irradiation molding |
| EP2744634B1 (en) * | 2011-08-18 | 2021-02-24 | Momentive Performance Materials GmbH | Irradiation and forming unit |
| WO2015104064A1 (en) * | 2014-01-13 | 2015-07-16 | Abb Research Ltd. | Electromagnetic radiation transparent polymer mould and method for manufacturing the same |
-
1989
- 1989-09-29 JP JP1251846A patent/JP2941311B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03114711A (en) | 1991-05-15 |
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