JPH01247123A - Preparation of hollow product - Google Patents
Preparation of hollow productInfo
- Publication number
- JPH01247123A JPH01247123A JP7569988A JP7569988A JPH01247123A JP H01247123 A JPH01247123 A JP H01247123A JP 7569988 A JP7569988 A JP 7569988A JP 7569988 A JP7569988 A JP 7569988A JP H01247123 A JPH01247123 A JP H01247123A
- Authority
- JP
- Japan
- Prior art keywords
- core
- mold
- injection molding
- raw materials
- hollow
- 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
- 239000002994 raw material Substances 0.000 claims abstract description 43
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 13
- 239000004945 silicone rubber Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000010107 reaction injection moulding Methods 0.000 claims description 19
- 229920001296 polysiloxane Polymers 0.000 abstract description 10
- 230000009257 reactivity Effects 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 150000002009 diols Chemical class 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 abstract description 3
- -1 polysiloxane Polymers 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 23
- 238000000465 moulding Methods 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 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ＲＩ Ｍ （Ｒｅａｃｔｉｏｎ Ｉｎｊｅｃｔ
ｉｏｎ Ｍｏｌｄｉｎｇ）あるいはＲ−ＲＩ Ｍ （Ｒ
ｅｉｎｆｏｒｃｅｄ−ＲＩＭ）成形などの反応射出成形
法において使用される原料（以下、反応射出成形用原料
という）を利用して中空製品を製造する方法に関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to RIM (Reaction Inject).
ion Molding) or R-RI M (R
The present invention relates to a method for manufacturing hollow products using raw materials used in reaction injection molding methods such as einforced-RIM molding (hereinafter referred to as raw materials for reaction injection molding).
［従来の技術］
ＲＩＭあるいはＲ−ＲＩＭＪｉ形法と呼ばねている反応
射出成形法においては、それに使用される原料の粘度が
低いため、原料の射出圧力が低い場合でも、型内での原
料の流動性が良く、表面積の大きい製品や中空製品など
複雑な形状の製品を製造する時に使用されている。[Prior art] In the reaction injection molding method, which is often referred to as RIM or R-RIMJi molding method, the viscosity of the raw material used is low, so even when the injection pressure of the raw material is low, the raw material in the mold is It has good fluidity and is used when manufacturing products with complex shapes such as products with large surface areas or hollow products.
［発明が解決しようとする課題］
反応射出成形用原料を使用して中空製品を製造する場合
、通常、射出成形などと同様、型に製品の中空部と同形
状の中子を設置し、成形終了後、製品から中子を何等か
の手段で取外す方法が行われている。しかし、反応射出
成形用原料の反応性を損なわないようにするため、中子
の材質には制約があり、中空部の構造が簡単な場合でも
中子の製作に時間がかかり、製作費用も高いなどの欠点
があった。また、中空部の形状が複雑な場合や抜き勾配
が負となるような形状の場合は、中子の製作が困難で、
中空製品を一体で製造することができなかった。[Problem to be solved by the invention] When manufacturing hollow products using raw materials for reaction injection molding, normally, as in injection molding, a core of the same shape as the hollow part of the product is installed in a mold, and the molding After finishing, the core is removed from the product by some means. However, in order not to impair the reactivity of raw materials for reaction injection molding, there are restrictions on the material of the core, and even if the hollow structure is simple, it takes time to manufacture the core and the manufacturing cost is high. There were drawbacks such as. In addition, if the shape of the hollow part is complex or the draft angle is negative, it is difficult to manufacture the core.
It was not possible to manufacture hollow products in one piece.
従来、反応射出成形用原料を使用した中空製品を製造す
る方法では上記のような欠点を改良する具体的な提案は
されていないが、射出成形、注型成形などでは次のよう
な提案かある。Conventionally, there have been no concrete proposals to improve the above-mentioned drawbacks in the method of manufacturing hollow products using raw materials for reaction injection molding, but the following proposals have been made for injection molding, cast molding, etc. .
例えば、特公昭５２−１８２２６号公報では、中子に融
解塩で被覆した不活性の材料を使用する方法か開示され
ている。この方法で使用する中子は水を流出させること
により取除かれるか、中子の除去作業工程が煩雑であり
、その都度中子か破壊されるので、中子の繰返し使用が
できないなどの欠点があった。For example, Japanese Patent Publication No. 52-18226 discloses a method in which the core is coated with an inert material coated with molten salt. The core used in this method is removed by draining water, or the process of removing the core is complicated, and the core is destroyed each time, so the core cannot be used repeatedly. was there.
また特開昭５１−１１１２６号公報では、中子として中
空の可撓性のある材料を使用する方法が提案されている
。しかし、この方法には具体的な材料の提案がなく、ま
た、中子の作成法についても不明である。反応射出成形
用原料は高い反応性があり、成形時に高温になるという
特徴を有しているか、通常、可撓性を有する材料の多く
は耐薬品性や耐熱性に劣るため、反応射出成形用原料の
反応性を阻害したり、高温によって変形したりするため
、この方法をそのまま反応射出成形用原料を使用する方
法に適用することは困難であった。Furthermore, Japanese Patent Application Laid-Open No. 51-11126 proposes a method of using a hollow flexible material as the core. However, there are no proposals for specific materials for this method, and the method for making the core is also unclear. Raw materials for reaction injection molding are highly reactive and have the characteristics of being heated to high temperatures during molding, and many flexible materials usually have poor chemical resistance and heat resistance. It has been difficult to apply this method directly to a method using raw materials for reaction injection molding because the reactivity of the raw materials is inhibited or the raw materials are deformed by high temperatures.
特開昭５４−１５６０８０号公報では、低融点合金から
なる中子を使用した方法か開示されている。この方法で
は製品を型から取出した後、中子を溶融・除去するが、
中子の溶融に長時間を必要とし、また中子を溶融させる
ため繰返し使用かできないなど生産性が悪いだけでなく
、低融点合金の回収率が悪く、製造費も高くなるという
欠点があった。JP-A-54-156080 discloses a method using a core made of a low melting point alloy. In this method, the core is melted and removed after the product is removed from the mold.
Not only did it take a long time to melt the core, and because the core was melted, it could only be used repeatedly, resulting in poor productivity, but also had the drawbacks of poor recovery of low melting point alloys and high manufacturing costs. .
さらに特開昭６１−２０５１０８号公報では、中子に脆
性破壊する材料を使用する方法を提案している。この方
法では、製品を型から取出した後、中子を破壊・粉砕し
て除去するが、粉砕工程が繁雑となり、また中子を繰返
し使用できないなどの欠点があった。Furthermore, Japanese Patent Application Laid-Open No. 61-205108 proposes a method of using a material that causes brittle fracture in the core. In this method, after the product is removed from the mold, the core is destroyed and crushed to be removed, but the crushing process is complicated and the core cannot be used repeatedly.
従って本発明の目的は、反応射出成形用原料を使用して
中空製品を製造するに際し、反応射出成形用原料の反応
性を阻害せず、製品からの取出しが容易で、且つ繰返し
使用が可能である他、作製が容易であるなどの特徴を有
する中子を用いて中空製品を製造する方法を提供するこ
とにある。Therefore, an object of the present invention is to produce a hollow product using raw materials for reaction injection molding without inhibiting the reactivity of the raw materials for reaction injection molding, which can be easily removed from the product, and which can be used repeatedly. Another object of the present invention is to provide a method for manufacturing a hollow product using a core that is easy to manufacture.
［課題を解決するための手段］
そこで本発明者は種々検討した結果、特定の引張強度と
伸びを有する室温加硫型シリコーンゴムで作成した中子
を使用すると上記目的達成のために好適であることを見
出し、本発明を完成した。[Means for Solving the Problems] Therefore, as a result of various studies, the present inventor found that using a core made of room temperature vulcanizable silicone rubber having a specific tensile strength and elongation is suitable for achieving the above object. They discovered this and completed the present invention.
即ち、本発明は、成形型に中空製品の中空部と同形状の
中子を設置し、次いで該型内に反応射出成形用原料を入
れて成形した後、該中子を取外すことにより中空製品を
製造する方法において、引張強度が２５ ｋｇ／ｃｍ２
以上で、且つ伸びが１３０％以上である室温加硫型シリ
コーンゴム酸の中子を使用することからなる中空製品の
製造方法を提供するものである。That is, in the present invention, a core having the same shape as the hollow part of a hollow product is installed in a mold, a raw material for reaction injection molding is put into the mold and molded, and then the core is removed. In the method for manufacturing, the tensile strength is 25 kg/cm2
The present invention provides a method for manufacturing a hollow product which uses a room temperature vulcanizable silicone rubber acid core having an elongation of 130% or more.
本発明において中子として使用する室温加硫型シリコー
ンゴムは、引張強度が２５ ｋｇ／ｃｍ２以上で、且つ
伸びか１３０％以上、より好ましくは、引張強度が３５
ｋｇ／ｃｍ２以上で、且つ伸びが２００％以上の特性
を有するもので、硬化剤の作用によってポリシロキサン
ジオールを硬化させてつくることかできる。このシリコ
ーンゴムには、ミルドガラスなどのガラス繊維やカーボ
ン繊維などの繊維状強化材、粉末シリカ、金属粉などの
充填剤か配合されていても良い。引張強度や伸びか上記
の数値より低い場合には、製品から中子を取除く際、中
子が切断などによって破損するため、繰返し使用するこ
とか困難となり、本発明の目的に使用できない。上記特
性を有するシリコーンゴムの具体例としては、信越化学
社、東しシリコーン社などから販売されてい二液型室温
加硫（ＲＴＶ）シリコーンゴムを硬化させたものなどが
ある。The room temperature vulcanizable silicone rubber used as the core in the present invention has a tensile strength of 25 kg/cm2 or more and an elongation of 130% or more, more preferably a tensile strength of 35 kg/cm2 or more.
kg/cm2 or more and has an elongation of 200% or more, and can be made by curing polysiloxane diol by the action of a curing agent. This silicone rubber may contain a fibrous reinforcing material such as glass fiber such as milled glass or carbon fiber, or a filler such as powdered silica or metal powder. If the tensile strength or elongation is lower than the above values, the core will be damaged by cutting when removed from the product, making it difficult to use it repeatedly, and it cannot be used for the purpose of the present invention. Specific examples of silicone rubbers having the above characteristics include cured two-component room temperature vulcanization (RTV) silicone rubbers sold by Shin-Etsu Chemical Co., Toshi Silicone Co., Ltd., and the like.
上記シリコーンゴムを使用した中子は、中空部と同一の
形状をした型の中に、ポリシロキサンジオールと所定量
の硬化剤（触媒）との均一混合物を流し込み、２５°Ｃ
で７０時間以上（１００°Ｃては約１０時間以上）放置
し、硬化させることにより容易に製作できる。The core using silicone rubber is made by pouring a homogeneous mixture of polysiloxane diol and a predetermined amount of curing agent (catalyst) into a mold with the same shape as the hollow part, and heating it at 25°C.
It can be easily manufactured by leaving it at a temperature of 70 hours or more (approximately 10 hours or more at 100°C) and curing it.
本発明で使用するシリコーンゴムは所定の強度と柔軟性
を有するため、中子形状か複雑な場合ても、型から容易
に堆出すことができ、繰返し使用も可壱である。また、
反応射出成形用原料の反応性を阻害することもなく、耐
熱性も優れている。Since the silicone rubber used in the present invention has a predetermined strength and flexibility, even if the core shape is complex, it can be easily deposited from a mold and can be used repeatedly. Also,
It does not inhibit the reactivity of raw materials for reaction injection molding and has excellent heat resistance.
製作された中子はその強度を低下させない範囲で中子内
部を空洞にしても良い。この場合は、製品からの中子の
取出しがより容易となり好ましい。The produced core may be hollow within the range that does not reduce its strength. In this case, the core can be more easily removed from the product, which is preferable.
本発明で使用される反応射出成形用原料のうち、ＲＩＭ
原料としては、ポリウレタンＲＩＭ原料、ナイロンＲＩ
Ｍ原料、エポキシＲＩＭ原料、不飽和ポリエステルＲＩ
Ｍ原料、ジシクロペンタジェンＲＩＭ原料、ボリュリア
ＲＩＭ原料、アクリラメ−）−ＲＩＭ原料などがある。Among the raw materials for reaction injection molding used in the present invention, RIM
Raw materials include polyurethane RIM raw materials, nylon RI
M raw material, epoxy RIM raw material, unsaturated polyester RI
Examples include M raw materials, dicyclopentadiene RIM raw materials, Voluria RIM raw materials, and acrylame-RIM raw materials.
ポリウレタンＲＩＭ原料の具体例としては、ウレタンＲ
ＩＭ ＰＵＣ５０１−Ｒ（大日精化工業社製）が、ナ
イロンＲＩＭ原料の具体例としては、ＵＢＥナイロンＲ
ＩＭ （宇部興産社製）、ＮＹＲＩＭ （ＤＳＭ社製）
が、ジシクロペンタジェンＲＩＭ原料の具体例としては
、メトン（音大社製）が、アクリラメートＲＩＭ原料の
具体例としては、アリマックス（アッシュランド・ケミ
カル社製）がある。Specific examples of polyurethane RIM raw materials include urethane R
IM PUC501-R (manufactured by Dainichiseika Chemical Industry Co., Ltd.) is a specific example of the nylon RIM raw material, which is UBE nylon R.
IM (manufactured by Ube Industries), NYRIM (manufactured by DSM)
However, a specific example of the dicyclopentadiene RIM raw material is Metone (manufactured by Ontaisha), and a specific example of the acrylamate RIM raw material is Arimax (manufactured by Ashland Chemical Co.).
また、本発明で用いられる反応射出成形用原料のうち、
Ｒ−ＲＩ Ｍ原料としては、上記ＲＩＭ原料にミルドガ
ラス、繊維状マグネシウム化合物、鉱物繊維、グラファ
イト繊維、ボロンｍ雄、炭酸カルシウム、ワラストナイ
ト、カオリン、黒鉛、カーボンブラック、二硫化モリブ
デンなどの強化材や充填剤を添加したものである。これ
らの強化材や充填剤の添加量は、ＲＩＭ原料ｉｏｏ重量
部に対して５〜１２０重量部であることが好ましい。Furthermore, among the raw materials for reaction injection molding used in the present invention,
As R-RIM raw materials, the above RIM raw materials are reinforced with milled glass, fibrous magnesium compounds, mineral fibers, graphite fibers, boron m-mole, calcium carbonate, wollastonite, kaolin, graphite, carbon black, molybdenum disulfide, etc. Added materials and fillers. The amount of these reinforcing materials and fillers added is preferably 5 to 120 parts by weight based on ioo parts by weight of the RIM raw material.
本発明における中空製品の製造は、前記方法で作成した
中子を設置した成形型を所定温度に調節した後、該型内
へ反応射出成形用原料を反応射出成形機または注型成形
機にて入れることにより行なわれる。成形終了後、型よ
り取出した製品から本発明の中子は容易に引抜くことが
でき、直ちに、次の成形に使用することができる。これ
らにより製造される中空製品の具体例としては、自動車
のエンジン回りの三次元構造の中空パイプなどがある。In the production of the hollow product in the present invention, after adjusting the mold in which the core prepared by the above method is installed to a predetermined temperature, raw materials for reaction injection molding are poured into the mold using a reaction injection molding machine or a cast molding machine. This is done by putting it in. After completion of molding, the core of the present invention can be easily pulled out from the product taken out of the mold, and can be immediately used for the next molding. Specific examples of hollow products manufactured using these methods include three-dimensionally structured hollow pipes around automobile engines.
［発明の効果］
以上説明したように、本発明によれば、中空製品を反応
射出成形用原料を使用して製造するに際し、引張強度か
２５ ｋｇ／ｃ−２以上で、且つ伸びが１３０％以上で
ある室温加硫型シリコーンゴム製中子を使用することに
より１反応射出成形用原料の反応性が阻害されることが
なく、製品からの中子除去が容易で、中子の繰返し使用
が可能となり、生産性良く中空製品を製造することが可
能となる。また、室温加硫型シリコーンゴムの使用によ
り、中子製作も容易となるという利点がある。[Effects of the Invention] As explained above, according to the present invention, when manufacturing a hollow product using raw materials for reaction injection molding, the tensile strength is 25 kg/c-2 or more and the elongation is 130%. By using the room temperature vulcanizable silicone rubber core described above, the reactivity of the raw material for one-reaction injection molding is not inhibited, the core can be easily removed from the product, and the core can be used repeatedly. This makes it possible to manufacture hollow products with high productivity. Furthermore, the use of room temperature vulcanizable silicone rubber has the advantage that core production is facilitated.
［実施例］
以下、実施例によって本発明を更に詳細に説明するが、
本発明はこれら実施例に限られるものではない。[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples.
The present invention is not limited to these examples.
（実施例１）
信越シリコーン型取り用ＲＴＶゴム、ＫＥ１３００（信
越化学社製、硬化後の引張強度４５ｋｇ／ｃｍ２、伸び
３００％）に所定量の付属触媒を均一に混合し、減圧に
より脱泡した後、内部が第１図に示す中子３と同一の形
状をした型の中へ流し込み、２５℃で７２時間放置して
、第１図に示す中子３を作製した。この中子３を第１図
のように型に設置し、型温な１３０℃に昇温した。この
型へ１００℃に加熱したＵＢＥナイロンＲＩＭ原料ＵＸ
−Ｃ（宇部興産社製）を注入口５より注入した。３分後
型を開き、製品を取出した。この製品から中子は容易に
引抜くことが出来た。この中子は変形しておらず、引続
き、次の成形に使用できた。(Example 1) Shin-Etsu silicone mold-making RTV rubber, KE1300 (manufactured by Shin-Etsu Chemical Co., Ltd., tensile strength after curing: 45 kg/cm2, elongation: 300%) was uniformly mixed with a predetermined amount of the attached catalyst, and defoamed under reduced pressure. Thereafter, it was poured into a mold whose interior had the same shape as the core 3 shown in FIG. 1, and left at 25° C. for 72 hours to produce the core 3 shown in FIG. 1. This core 3 was placed in a mold as shown in FIG. 1, and the mold temperature was raised to 130°C. UBE nylon RIM raw material UX heated to 100℃ into this mold
-C (manufactured by Ube Industries, Ltd.) was injected from injection port 5. After 3 minutes, the mold was opened and the product was taken out. The core could be easily pulled out from this product. This core was not deformed and could be used for subsequent molding.
（比較例１）
信越シリコーン型取り用ＲＴＶゴム、ＫＥ１３００の代
わりに、信越シリコーン型取り用ＲＴＶゴム、ＫＥ３０
（信越化学社製、硬化後の引張強度２０ ｋｇ／ｃｍ２
、伸び１００％）を使用した以外は実施例１と同一の方
法で実施した。その結果、中子は製品から引抜くときに
切断し、取り出すことができなかった。(Comparative Example 1) Shin-Etsu silicone mold-making RTV rubber, KE30, was used instead of Shin-Etsu silicone mold-making RTV rubber, KE1300.
(Manufactured by Shin-Etsu Chemical Co., Ltd., tensile strength after curing: 20 kg/cm2
, elongation 100%) was used in the same manner as in Example 1. As a result, the core was cut when being pulled out from the product and could not be taken out.
（比較例２）
信越シリコーン型取り用ＲＴＶゴム、ＫＥ１３００の代
わりに、工業モデル用ウレタン樹脂ＲＡ−８０（日本ゼ
オン社製、硬化後の引張強度１７５ ｋｇ／ｃｍ２、伸
び２００％）を使用した以外は実施例１と同一の方法で
実施した。その結果、ウレタン製の中子は製品の中で変
形し、製品から取出すことかてきなかった。(Comparative Example 2) Shin-Etsu silicone RTV rubber for mold making, except that urethane resin RA-80 for industrial models (manufactured by Nippon Zeon Co., Ltd., tensile strength after curing 175 kg/cm2, elongation 200%) was used instead of KE1300. was carried out in the same manner as in Example 1. As a result, the urethane core was deformed within the product and could not be removed from the product.
（実施例２）
信越シリコーン型取り用ＲＴＶゴム、ＫＥ１３００の代
わりに、信越シリコーン型取り用ＲＴＶゴム、ＫＥ１４
００（信越化学社製、硬化後の引張強度４０ ｋｇ／ｃ
ｍ２、伸び２５０％）を使用した以外は実施例１と同一
の方法で実施した。その結果、中子は容易に引抜くこと
かでき、良好な製品を得ることかできた。(Example 2) Shin-Etsu silicone mold-making RTV rubber, KE14 was used instead of Shin-Etsu silicone mold-making RTV rubber, KE1300.
00 (manufactured by Shin-Etsu Chemical Co., Ltd., tensile strength after curing 40 kg/c
The same method as in Example 1 was used except that 250% of elongation was used. As a result, the core could be easily pulled out and a good product could be obtained.
（実施例３）
ＵＢＥナイロンＲＩＭ原料ＵＸ−Ｃの代わりに、ＵＢＥ
ナイ０ンＲＩ Ｍ原料ＵＸ−ＣＬ （宇部興産社製、ミ
ルドガラス２０ ｗ ｔ％添加クレード）を使用した他
は実施例１と同様に実施した。その結果、中子は容易に
引抜くことかできた。(Example 3) Instead of UBE nylon RIM raw material UX-C, UBE
The same procedure as in Example 1 was carried out except that Nyon RIM raw material UX-CL (manufactured by Ube Industries, Ltd., milled glass 20 wt% added clade) was used. As a result, the core could be easily pulled out.
（実施例４）
ＵＢＥナイロンＲＩＭ原料ＵＸ−Ｃの代わりに、ウレタ
ンＲＩＭ用原料（大日精化工業社製、ＰＵＣ５０１−Ｒ
）を使用し、型温な８０°Ｃにした以外は、実施例１と
同一の方法て実施した。その結果、中子は容易に引抜く
ことかできた。(Example 4) Instead of UBE nylon RIM raw material UX-C, urethane RIM raw material (manufactured by Dainichiseika Kagyo Co., Ltd., PUC501-R
) was used, and the same method as in Example 1 was carried out, except that the mold temperature was 80°C. As a result, the core could be easily pulled out.
【図面の簡単な説明】
第１図は本発明に使用する中子を型内に挿入・設置した
状態を示す断面図である。
ｌ・・・上型、２・・・下型、３・・・中子、４・・・
製品、５・・・注入口。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a state in which a core used in the present invention is inserted and installed in a mold. l...upper mold, 2...lower mold, 3...core, 4...
Product, 5... Inlet.
Claims (1)
いで該型内に反応射出成形用原料を入れて成形した後、
該中子を取外すことにより中空製品を製造する方法にお
いて、引張強度が２５ｋｇ／ｃｍ＾２以上で、、且つ伸
びが１３０％以上である室温加硫型シリコーンゴム製の
中子を使用することを特徴とする中空製品の製造方法。A core with the same shape as the hollow part of the hollow product is installed in a mold, and then raw materials for reaction injection molding are put into the mold and molded, and then
In the method of manufacturing hollow products by removing the core, it is recommended to use a core made of room temperature vulcanizable silicone rubber with a tensile strength of 25 kg/cm^2 or more and an elongation of 130% or more. Features: A manufacturing method for hollow products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7569988A JPH01247123A (en) | 1988-03-29 | 1988-03-29 | Preparation of hollow product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7569988A JPH01247123A (en) | 1988-03-29 | 1988-03-29 | Preparation of hollow product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01247123A true JPH01247123A (en) | 1989-10-03 |
Family
ID=13583725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7569988A Pending JPH01247123A (en) | 1988-03-29 | 1988-03-29 | Preparation of hollow product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01247123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005059347A (en) * | 2003-08-11 | 2005-03-10 | Nichirin Co Ltd | Resin or rubber mandrel for manufacturing hose |
| JP2006187975A (en) * | 2005-01-07 | 2006-07-20 | Dogu:Kk | Reactive injection mold |
| JP2011011477A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding prepreg molding for hollow structure and method for molding composite material molding |
-
1988
- 1988-03-29 JP JP7569988A patent/JPH01247123A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005059347A (en) * | 2003-08-11 | 2005-03-10 | Nichirin Co Ltd | Resin or rubber mandrel for manufacturing hose |
| JP2006187975A (en) * | 2005-01-07 | 2006-07-20 | Dogu:Kk | Reactive injection mold |
| JP2011011477A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding prepreg molding for hollow structure and method for molding composite material molding |
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