JPH0545408B2 - - Google Patents
Info
- Publication number
- JPH0545408B2 JPH0545408B2 JP60034637A JP3463785A JPH0545408B2 JP H0545408 B2 JPH0545408 B2 JP H0545408B2 JP 60034637 A JP60034637 A JP 60034637A JP 3463785 A JP3463785 A JP 3463785A JP H0545408 B2 JPH0545408 B2 JP H0545408B2
- Authority
- JP
- Japan
- Prior art keywords
- urethane
- paint
- semi
- mold
- cavity
- 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
Links
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000003973 paint Substances 0.000 claims description 20
- 150000001412 amines Chemical class 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000011550 stock solution Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen compound Chemical class 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- DAZXVJBJRMWXJP-UHFFFAOYSA-N n,n-dimethylethylamine Chemical compound CCN(C)C DAZXVJBJRMWXJP-UHFFFAOYSA-N 0.000 description 1
- GNVRJGIVDSQCOP-UHFFFAOYSA-N n-ethyl-n-methylethanamine Chemical compound CCN(C)CC GNVRJGIVDSQCOP-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000010107 reaction injection moulding Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Instrument Panels (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Steering Controls (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、半硬質ウレタン自動車部品例えば
ステアリングホイール、インストルメントパネ
ル、アームレスト、コンソールボツクス、バンパ
ー、スポイラー等の内外装飾部品の製造法に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for manufacturing semi-rigid urethane automobile parts such as interior and exterior decorative parts such as steering wheels, instrument panels, armrests, console boxes, bumpers, and spoilers.
従来の技術
従来の半硬質ウレタン自動車用部品は、反応射
出成形（以下RIM成形という）で製造され、金
型キヤビテイ面に塗料を塗布してから、該キヤビ
テイ内にウレタン原液を注入して成形し、成形品
表面に表皮を一体に形成するインモールドコーテ
イング法が行なわれている。この際、製品の外
観、品質を保持するため、塗膜は通常の厚さ10〜
15μに対し、30〜50μとかなり厚く形成しなけれ
ばならない。又、塗膜の耐久性、耐薬品性、耐摩
耗性等の要請に応えるために化学反応によつて硬
化する塗膜を形成することも求められている。Conventional technology Conventional semi-rigid urethane automotive parts are manufactured by reaction injection molding (hereinafter referred to as RIM molding), in which paint is applied to the surface of a mold cavity, and then urethane stock solution is injected into the cavity. An in-mold coating method is used in which a skin is integrally formed on the surface of a molded product. At this time, in order to maintain the appearance and quality of the product, the coating film should be kept at the normal thickness of 10~
It must be formed considerably thicker, 30 to 50μ compared to 15μ. Furthermore, in order to meet the requirements for coating film durability, chemical resistance, abrasion resistance, etc., it is also required to form a coating film that hardens through a chemical reaction.
発明が解決しようとする問題点
上記従来の技術において、厚い塗膜を化学反応
によつて硬化させるとなると、長い化学反応時間
（硬化時間）を要したり、成形温度より遥かに高
い硬化温度を要したりするために、成形サイクル
が長くなつたり、金型温度管理に多大の工数、コ
ストを要したりする欠点がある。この欠点を克服
するために反応速度の速い塗料を使用する方法も
あるが、そうすると塗料の可使時間が短くなり、
作業上の困難や塗料損失量の増大という問題を引
き起す。Problems to be Solved by the Invention In the conventional techniques described above, when a thick coating film is cured by a chemical reaction, a long chemical reaction time (curing time) is required, or a curing temperature far higher than the molding temperature is required. This has disadvantages in that the molding cycle becomes longer and mold temperature control requires a large amount of man-hours and costs. One way to overcome this drawback is to use paints with a fast reaction rate, but this will shorten the pot life of the paint.
This causes problems in terms of operational difficulties and increased paint loss.
可使時間の短い反応性の速い塗料に対しては、
特殊２頭ガン塗装機の使用によつて、塗布直前
に、２液を必要量だけ混合する方式もあるが、こ
の方式には混合不良、ノズルの詰まり、洗浄シン
ナーの使用量が多いこと、急激な反応熱放出に伴
なうピンホールの形成、塗装設備が高コストであ
ること、タンク中の原液量管理ミスによる１液欠
落の危険等の問題があつた。 For highly reactive paints with short pot life,
There is also a method that uses a special two-gun paint sprayer to mix the required amount of two liquids immediately before application, but this method has problems such as poor mixing, nozzle clogging, the use of a large amount of cleaning thinner, and rapid There were problems such as the formation of pinholes due to the release of reaction heat, the high cost of coating equipment, and the risk of missing one liquid due to mismanagement of the amount of stock solution in the tank.
問題点を解決するための手段
この発明は、このような従来の技術における問
題点を解決するためになされたもので、予熱され
た金型のキヤビテイ面に２液型ウレタン系塗料を
塗布し、型閉状態の該キヤビテイ内にアミン系雰
囲気を導入して前記塗料を迅速に硬化させ、つい
で該金型キヤビテイ内に半硬質ウレタン原液を注
入し、前記ウレタン系塗膜を表皮とし、前記半硬
質ウレタンを芯体とする表皮付一体成形物を成形
することを特徴とする半硬質ウレタン自動車部品
の製造法である。Means for Solving the Problems This invention was made to solve the problems in the conventional technology, and involves applying a two-component urethane paint to the cavity surface of a preheated mold. An amine-based atmosphere is introduced into the mold cavity in a closed state to quickly cure the paint, and then a semi-hard urethane stock solution is injected into the mold cavity, the urethane-based paint film becomes a skin, and the semi-hard This is a method for manufacturing semi-rigid urethane automobile parts, which is characterized by molding an integrally molded product with a skin made of urethane as a core.
すなわちこの発明では、２液型ウレタン系塗料
の硬化乾燥に当り、アミン系雰囲気を触媒として
導入することにより、比較的低温で迅速に硬化さ
せることにより上記の問題点を解決したものであ
る。 That is, the present invention solves the above-mentioned problems by introducing an amine atmosphere as a catalyst in curing and drying a two-component urethane paint to rapidly cure it at a relatively low temperature.
本発明に使用する２液型ウレタン系塗料として
は、下記の各種変性が可能である。 The two-component urethane paint used in the present invention can be modified in various ways as described below.
１ ウレタン変性アクリルポリエステル
２ ウレタン変性ポリエステル
３ ウレタン変性エポキシ
４ ウレタン変性アクリル・エポキシ
５ ウレタン変性アクリル
アミン系雰囲気としては、トリメチルアミン、
エチルジメチルアミン、メチルジエチルアミン、
ジメチルエタノールアミン等の気体状もしくは蒸
気状のものが用いられる。1 Urethane-modified acrylic polyester 2 Urethane-modified polyester 3 Urethane-modified epoxy 4 Urethane-modified acrylic/epoxy 5 Urethane-modified acrylic The amine atmosphere includes trimethylamine,
ethyldimethylamine, methyldiethylamine,
A gas or vapor form such as dimethylethanolamine is used.
作 用
２液型ウレタン系塗料のイソシアネート基がア
ミン系雰囲気に遭遇すると、イソシアネートの炭
素原子にアミンの窒素原子が接近して、イソシア
ネートとアミンのコンプレツクスを作る。そこに
水酸基が存在すると水酸基のもつ活性水素化合物
が反応してウレタン結合を形成する。Effect When the isocyanate group of a two-component urethane paint encounters an amine atmosphere, the nitrogen atom of the amine approaches the carbon atom of the isocyanate, creating a complex between the isocyanate and the amine. When a hydroxyl group is present there, the active hydrogen compound of the hydroxyl group reacts to form a urethane bond.
このように２液型ウレタン系塗料を塗布したあ
とで、アミン雰囲気にさらすことで、アミンが塗
膜中に浸透し触媒効果を示して塗料を迅速に硬化
させる。 After applying the two-component urethane paint in this way, by exposing it to an amine atmosphere, the amine penetrates into the paint film and exhibits a catalytic effect, causing the paint to harden quickly.
実施例 以下、この発明を実施例によつて説明する。Example The present invention will be explained below with reference to Examples.
約50℃に予熱したRIM成形金型を型開きし、
そのキヤビテイ面にスプレーガンで離型剤を塗布
し、過剰に塗布された分をウエスで拭き取つてか
ら、さらに第２のスプレーガンで事前に混合され
た２液型ウレタン系塗料であるハイソリツドウレ
タン塗料を該キヤビテイ面に30〜50μの厚みに塗
布して型閉し、型キヤビテイ内を減圧してから、
アミン系蒸気例えばジエタノールアミンを1000〜
2000ppmの濃度になるように導入して、キヤビテ
イ面の塗膜と反応硬化させる。硬化時間は約１分
である。次いで半硬質発泡ウレタン原液を該型キ
ヤビテイ内に導入してRIM成形し、型開きして
成形品を取出せば、該ウレタン塗膜を表皮とし、
該半硬質発泡ウレタンを芯体とする一体成形品を
得る。 Open the RIM mold that has been preheated to approximately 50℃,
A mold release agent is applied to the cavity surface using a spray gun, the excess applied is wiped off with a rag, and then a second spray gun is used to apply a pre-mixed two-component urethane paint called Hysol. Apply urethane paint to a thickness of 30 to 50μ on the cavity surface, close the mold, reduce the pressure inside the mold cavity, and then
Amine vapor such as diethanolamine 1000~
It is introduced at a concentration of 2000 ppm and cured by reaction with the coating film on the cavity surface. Curing time is about 1 minute. Next, a semi-rigid urethane foam stock solution is introduced into the mold cavity for RIM molding, and when the mold is opened and the molded product is taken out, the urethane coating film becomes the skin.
An integrally molded product having the semi-rigid urethane foam as a core is obtained.
効 果
以上説明してきたようにこの発明によれば、金
型キヤビテイ面に２液型ウレタン系塗料を塗布
し、型閉状態の該キヤビテイ内にアミン系雰囲気
を触媒として導入する方式としたため、耐久性、
耐薬品性、耐摩耗性等のすぐれた、化学反応硬化
タイプの比較的厚い塗膜を迅速に低温で形成する
ことができ、表皮付き半硬質ウレタン自動車部品
の成形サイクルを短縮し、生産性を向上させると
いう効果が得られる。又、有害アミン系雰囲気は
閉じた金型のキヤビテイ内へ導入されて、型外へ
の洩出が抑制されるので作業環境の汚染が防止さ
れる。Effects As explained above, according to the present invention, a two-component urethane paint is applied to the surface of the mold cavity, and an amine atmosphere is introduced as a catalyst into the cavity when the mold is closed. sex,
Relatively thick chemical reaction-curing coatings with excellent chemical resistance and abrasion resistance can be quickly formed at low temperatures, shortening the molding cycle for semi-rigid urethane auto parts with skins and increasing productivity. This has the effect of improving. Further, the harmful amine atmosphere is introduced into the cavity of the closed mold, and leakage to the outside of the mold is suppressed, thereby preventing contamination of the working environment.
Claims (1)
タン系塗料を塗布し、型閉状態の該キヤビテイ内
にアミン系雰囲気を導入して前記塗料を迅速に硬
化させ、ついで該金型キヤビテイ内に半硬質ウレ
タン原液を注入し、前記ウレタン系塗膜を表皮と
し、前記半硬質ウレタンを芯体とする表皮付一体
成形物を成形することを特徴とする半硬質ウレタ
ン自動車部品の製造法。1. Apply a two-component urethane paint to the cavity surface of a preheated mold, introduce an amine atmosphere into the closed cavity to quickly cure the paint, and then apply it inside the mold cavity. A method for manufacturing a semi-rigid urethane automobile part, which comprises injecting a semi-rigid urethane stock solution, forming an integrally molded product with a skin having the urethane coating film as a skin and the semi-rigid urethane as a core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60034637A JPS61193813A (en) | 1985-02-25 | 1985-02-25 | Manufacture of auto motive parts of semirigid urethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60034637A JPS61193813A (en) | 1985-02-25 | 1985-02-25 | Manufacture of auto motive parts of semirigid urethane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61193813A JPS61193813A (en) | 1986-08-28 |
| JPH0545408B2 true JPH0545408B2 (en) | 1993-07-09 |
Family
ID=12419924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60034637A Granted JPS61193813A (en) | 1985-02-25 | 1985-02-25 | Manufacture of auto motive parts of semirigid urethane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61193813A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5945200A (en) * | 1997-05-23 | 1999-08-31 | Kabushiki Kaisha Inoac Corporation | Molded plastic product with pad and method of manufacturing same |
-
1985
- 1985-02-25 JP JP60034637A patent/JPS61193813A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61193813A (en) | 1986-08-28 |
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