JPS63302009A - Manufacture of urethane molded product - Google Patents
Manufacture of urethane molded productInfo
- Publication number
- JPS63302009A JPS63302009A JP62137917A JP13791787A JPS63302009A JP S63302009 A JPS63302009 A JP S63302009A JP 62137917 A JP62137917 A JP 62137917A JP 13791787 A JP13791787 A JP 13791787A JP S63302009 A JPS63302009 A JP S63302009A
- Authority
- JP
- Japan
- Prior art keywords
- resin sheet
- urethane foam
- mold
- urethane
- molded product
- 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
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 49
- 239000011347 resin Substances 0.000 claims abstract description 49
- 239000006260 foam Substances 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 238000005187 foaming Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000006116 polymerization reaction Methods 0.000 abstract description 7
- 229920005749 polyurethane resin Polymers 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 22
- 238000007666 vacuum forming Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ウレタン成形品の製造方法に係り、特にその
表面の美観の向」二対策等に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a urethane molded product, and particularly to measures for improving the appearance of its surface.
（従来の技術）
従来より、ウレタンフオームの表面に樹脂ンートを一体
に接合してなるウレタン成形品は広〈実施化されている
。このようなウレタンフオームの表面に樹脂シートで覆
ってなるウレタン成形品を製造方法する場合、例えば特
開昭６１−２４６０５６号公報等に開示されるものでは
、第５図に示すように、」−型にと下型ｅとの間に所定
の空間（キャビティ）を有する真空成形用型の下型ｅの
」二で樹脂シートｆを加熱軟化して、下型ｅに設けられ
た多数の孔ｇ・・・から真空引きにより該樹脂シートｆ
を下型ｅに密着させ成形した後、」二型にとの所定の空
間１にウレタンフオーム用原料を流し込んで発泡させ、
樹脂シートとウレタンフオームとが一体化した成形品を
得ようとする方法が知られている。(Prior Art) Urethane molded products made by integrally bonding a resin piece to the surface of a urethane foam have been widely used. When manufacturing a urethane molded product in which the surface of such a urethane foam is covered with a resin sheet, for example, in the method disclosed in JP-A-61-246056, etc., as shown in FIG. The resin sheet f is heated and softened in the lower mold e of a vacuum forming mold having a predetermined space (cavity) between the mold and the lower mold e, and a large number of holes g are formed in the lower mold e. The resin sheet f is vacuumed from...
After molding by bringing it into close contact with the lower mold e, the raw material for urethane foam is poured into a predetermined space 1 of the second mold and foamed.
A method for obtaining a molded product in which a resin sheet and a urethane foam are integrated is known.
（発明が解決しようとする問題点）
しかしながら、上記従来の方法では、樹脂シートｆを真
空成形するには加熱および真空引きのための設備が必要
で、製造コストが高くつく。また、真空成形を行うため
の下型ｅ側には、」−記のように、多数の孔ｇ・・・が
設けられており、製品の表面にこの孔ｇ・・・の跡が残
って表面の美観を損ねるという問題かあった。(Problems to be Solved by the Invention) However, in the conventional method described above, equipment for heating and evacuation is required to vacuum form the resin sheet f, resulting in high manufacturing costs. In addition, on the side of the lower die e for vacuum forming, there are many holes g... as shown in "-", and the marks of these holes g... remain on the surface of the product. There was a problem that it spoiled the aesthetic appearance of the surface.
本発明は斯かる点に鑑みてなされたものであり、その目
的は、ウレタン原料の発泡時の特性を活用して、真空成
形を行うことなく樹脂シートを上方からの圧力で下型に
密着させることにより、下型の真空引きのための孔を無
くし、表面の美観の向上を図るとともに、製造設備の低
廉化を図ることにある。The present invention was made in view of the above, and its purpose is to make use of the foaming properties of urethane raw materials to tightly adhere a resin sheet to a lower mold by applying pressure from above without performing vacuum forming. By doing so, the purpose is to eliminate the hole for evacuation of the lower mold, improve the aesthetic appearance of the surface, and reduce the cost of manufacturing equipment.
（問題点を解決するための手段） ′上記目的を
達成するため、本発明の解決手段は、ウレタンフオーム
用原料の重合反応時の高い発泡圧力と反応温度とを利用
して、樹脂シートを下型面に密着させることに特徴があ
る。(Means for Solving the Problems) 'In order to achieve the above object, the solution of the present invention utilizes the high foaming pressure and reaction temperature during the polymerization reaction of raw materials for urethane foam to lower the resin sheet. It is characterized by its close contact with the mold surface.
具体的には、本発明のウレタン成形品の製造方法として
、注入型の上下型間に樹脂シートをセットして、該」二
型と下型との間の空間にウレタンフオーム用樹脂原利を
注入し、該ウレタンフオーム用原料を発泡させて、その
発泡圧により」−記樹脂シートを下型の型面に圧着させ
つつ、ウレタンフオームと一体化成形するものである。Specifically, as the method for manufacturing a urethane molded product of the present invention, a resin sheet is set between the upper and lower molds of an injection mold, and a resin base material for urethane foam is placed in the space between the second mold and the lower mold. The resin sheet is injected, the raw material for the urethane foam is foamed, and the resin sheet is pressed against the mold surface of the lower mold by the foaming pressure, and integrally molded with the urethane foam.
本発明に使用されるウレタンフオーム用原料は、分子、
中にＯＨ基を有するポリオールおよび分子中に複数のＮ
ＧＯ基を有するイソシアネートを主原料とし、それらに
重合反応促進用触媒、および水。The raw materials for urethane foam used in the present invention are molecules,
Polyols with OH groups in them and multiple N in the molecule
The main raw materials are isocyanate having GO groups, a catalyst for promoting the polymerization reaction, and water.
フロン等の発泡剤などを添加したものである。It contains foaming agents such as fluorocarbons.
また、本発明に使用される樹脂シートとしては、ポリ塩
化ビニル、ポリエチレン、ポリプロピレン等の熱可塑性
樹脂かあり、ウレタンフオーム用原料の反応熱と樹脂の
軟化温度との兼ね合いで選択するのか望ましい。Further, the resin sheet used in the present invention may be a thermoplastic resin such as polyvinyl chloride, polyethylene, polypropylene, etc., and it is preferable to select it based on the reaction heat of the raw material for the urethane foam and the softening temperature of the resin.
（作用）
以上の方法により、本発明では、注入型の」−型と樹脂
シートとの間に注入されたウレタンフオーム原料が重合
反応して発泡し、その高い発泡圧力および反応温度によ
り樹脂シートを下型に密着させるので、真空成形を行う
ことなく、樹脂シートとウレタンフオームとが一体に成
形されたウレタン成形品が得られることになり、真空成
形用の設備が不要となる。また、従来の方法のように真
空成形用下型に設けられた真空引き用の孔の跡かウレタ
ン成形品の樹脂シート側表面に残ることがな（、表面の
美観が向上する。(Function) According to the above method, in the present invention, the urethane foam raw material injected between the mold of the injection mold and the resin sheet polymerizes and foams, and the resin sheet is formed by the high foaming pressure and reaction temperature. Since it is brought into close contact with the lower mold, a urethane molded product in which the resin sheet and urethane foam are integrally molded can be obtained without performing vacuum forming, and vacuum forming equipment is not required. In addition, unlike conventional methods, no traces of the vacuum holes provided in the lower mold for vacuum forming remain on the surface of the resin sheet side of the urethane molded product (the aesthetic appearance of the surface is improved).
（実施例）
以下、本発明の実施例について、第１図ないし第４図に
基づき説明する。(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 4.
第１図は、本発明方法の実施例で使用するウレタン成形
品製造設備の概略構成を示し、１は下型２と上型３とか
らなる注入型であって、」−２下型２は成形後の製品を
ル出すために２つの分離型２ａ、２ｂに分割されている
とともに、その境界４が空気抜きを兼ねている。また、
」−配下型２と上型３との間には、ウレタン成形品を成
形すべき所定の形状を有する空間５が形成されている。FIG. 1 shows a schematic configuration of the urethane molded product manufacturing equipment used in the embodiment of the method of the present invention, in which 1 is an injection mold consisting of a lower mold 2 and an upper mold 3; It is divided into two separate molds 2a and 2b for ejecting the molded product, and the boundary 4 between the molds also serves as an air vent. Also,
- A space 5 having a predetermined shape in which a urethane molded product is to be formed is formed between the lower mold 2 and the upper mold 3.
６は該空間５に連通ずる原料の注入口で、該注入口６に
は、高圧（例えば３０ｋｇ／ｃｄ程度の注入圧力）で原
料を注入する注入機７が取付けられている。Reference numeral 6 denotes a raw material injection port communicating with the space 5, and an injection machine 7 for injecting the raw material at high pressure (for example, injection pressure of about 30 kg/cd) is attached to the injection port 6.
８ａ、８ａは該注入機７にウレタンフオーム成形用の一
方の原料ポリオール（Ａ液）を供給するための配管、ｓ
ｂ、ｇｂはもう一方の原料イソシアネート（Ｂ液）を供
給するための配管である。また、９・・・は注入型１の
温度を調節する温調水を流−八 −
通させるための温調水路である。8a, 8a are pipes for supplying one raw material polyol (liquid A) for urethane foam molding to the injection machine 7;
b and gb are piping for supplying the other raw material isocyanate (liquid B). Further, 9... is a temperature control waterway through which temperature control water for controlling the temperature of the injection mold 1 flows.
次に、ウレタン成形品の製造方法を説明するに、まず、
第１図に示すように、樹脂シート１０を下型２の上側に
載置した状態で上型３を下型２に係合させて樹脂シート
１０を注入型１にセットする。Next, to explain the manufacturing method of urethane molded products, first,
As shown in FIG. 1, with the resin sheet 10 placed above the lower mold 2, the upper mold 3 is engaged with the lower mold 2, and the resin sheet 10 is set in the injection mold 1.
このとき、上型３の型面３ａには剥離剤を、樹脂シート
１０の上面１０ａ側には接着剤をそれぞれ塗布する。ま
た、注入型１は温調水により４０〜５０℃に調節されて
いる。At this time, a release agent is applied to the mold surface 3a of the upper mold 3, and an adhesive is applied to the upper surface 10a of the resin sheet 10. Further, the injection mold 1 is adjusted to a temperature of 40 to 50°C using temperature-controlled water.
この後、第２図に示すように、上記注入機７により高圧
でポリウレタン樹脂原料である上記Ａ液と１１１１とを
混合しながら、上記樹脂シート１０と上型３との間の空
間５内に注入する。After that, as shown in FIG. 2, the injection machine 7 mixes the polyurethane resin raw materials A and 1111 at high pressure into the space 5 between the resin sheet 10 and the upper mold 3. inject.
そして、この注入により、第３図に示すように、ウレタ
ンフオーム用原料の重合反応および発泡が開始して、そ
のときに発生する高い発泡圧力により樹脂シート１０を
下型２の型面２ａに圧着しながら、樹脂シート１０の上
面側にはウレタンフオーム１１が形成される。As a result of this injection, as shown in FIG. 3, the polymerization reaction and foaming of the raw material for the urethane foam starts, and the high foaming pressure generated at that time presses the resin sheet 10 onto the mold surface 2a of the lower mold 2. Meanwhile, a urethane foam 11 is formed on the upper surface side of the resin sheet 10.
このとき、上記樹脂シート１０と下型２との間の空間５
の空気は、−１−記境界４からＡ部に排出される。また
、高い反応熱（１００〜１２０℃程度）により樹脂シー
ト１０は塑性変形を生しているのて、下型２の型面２ａ
に確実に密着する。At this time, the space 5 between the resin sheet 10 and the lower mold 2
The air of -1- is discharged from boundary 4 to section A. In addition, since the resin sheet 10 is plastically deformed due to the high reaction heat (about 100 to 120°C), the mold surface 2a of the lower mold 2
firmly adheres to.
そして、重合反応終了後、成形品および注入型１を温調
水で充分冷却して注入型１から成形品を取出して、トリ
ミング加工することにより、第４図に示すように、樹脂
シート１０とウレタンフオーム１１とて構成されたウレ
タン成形品１２を得る。After the polymerization reaction is completed, the molded product and the injection mold 1 are sufficiently cooled with temperature-controlled water, and the molded product is taken out from the injection mold 1 and trimmed to form a resin sheet 10 as shown in FIG. A urethane molded product 12 made of a urethane foam 11 is obtained.
したがって、上記実施例では、樹脂シートＪＯかウレタ
ンフオーム用原料の重合反応時の高い発泡圧力によりド
型２に密着され、さらに高い反応熱により十分塑性変形
して残留応力が除去されるので、従来のように樹脂シー
トを高い温度に加熱するだめの加熱設備および真空引き
のための真空ポンプ等の設備は不要である。よって、製
造設備の低廉化を図ることかできる。Therefore, in the above embodiment, the resin sheet JO or the raw material for the urethane foam is brought into close contact with the mold 2 by the high foaming pressure during the polymerization reaction, and is sufficiently plastically deformed by the high reaction heat to remove the residual stress. There is no need for equipment such as heating equipment for heating the resin sheet to a high temperature and equipment such as a vacuum pump for vacuuming. Therefore, it is possible to reduce the cost of manufacturing equipment.
また、樹脂シート１０を真空成形する場合には、変形し
た樹脂シート１０で真空引き用の孔か塞かれ易いので、
真空引きのための多数の孔を下型２に設ける必要がある
が、」−記のような発泡圧力を利用する場合には、その
ような恐れかほとんどなく、極めて僅かの空気抜き孔で
済む（上記実施例のような形状の製品の場合は分割型の
境界４にできるわずかな隙間だけでよい）。よって、製
造されたウレタン成形品１１の樹脂シーｌ・１０側表面
に多数の孔の跡が残らず、美観に勝れたウレタン成形品
１１を得ることができる。In addition, when vacuum forming the resin sheet 10, the holes for vacuuming are likely to be blocked by the deformed resin sheet 10.
It is necessary to provide a large number of holes in the lower mold 2 for evacuation, but when using foaming pressure as described above, there is almost no such fear, and only a very small number of air vent holes are needed ( In the case of a product shaped like the above example, only a small gap formed at the boundary 4 of the divided molds is required). Therefore, a urethane molded product 11 with excellent appearance can be obtained without leaving traces of many holes on the surface of the resin seal 1/10 side of the manufactured urethane molded product 11.
なお、上記実施例では、おもに２種類のウレタンフオー
ム用原料を別々に供給するようにしたか、予め混合した
ものを供給する方法も可能であることはいうまでもない
。In the above embodiments, the two types of raw materials for urethane foam were supplied separately, or it goes without saying that a method of supplying a mixture in advance is also possible.
（具体例） 次に、本発明の詳細な説明する。(Concrete example) Next, the present invention will be explained in detail.
ウレタンフオーム用原料として、下記組成のＡ液および
Ｂ液を調整した。Solutions A and B having the following compositions were prepared as raw materials for urethane foam.
（Ａ液）
イソシアネート（単体）
（Ｂ液）
ポリオール １．００重量部
シリコーン ２小量部
水 ０，３重量部
触媒 １．５重は部
フレオン ５重量部
そして、上記実施例の方法により、」二記Ａ液とＢ液と
を樹脂シート」二にパック率１１１５〜１１／８で注入
して発泡させると、約５ｋｇ／ｃＪの発泡圧力で樹脂シ
ートを注入型１の下型２に密着さゼるとともに、該樹脂
ンート１０と一体にウレタンフオームを形成することが
でき、所定の形状と優れた表面の美観とを有するウレタ
ン成形品を得た。(Liquid A) Isocyanate (single substance) (Liquid B) Polyol 1.00 parts by weight Silicone 2 small parts Water 0.3 parts by weight Catalyst 1.5 parts Freon 5 parts by weight And, by the method of the above example, When liquid A and liquid B are injected into the resin sheet 2 at a packing ratio of 1115 to 11/8 and foamed, the resin sheet is brought into close contact with the lower mold 2 of the injection mold 1 with a foaming pressure of approximately 5 kg/cJ. At the same time, a urethane foam could be formed integrally with the resin cartridge 10, and a urethane molded product having a predetermined shape and excellent surface appearance was obtained.
（発明の効果）
以」二説明したように、本発明のウレタン成形品の製造
方法によれは、ウレタンフオーム用原料の重合反応によ
る発泡圧力および反応熱を利用して、ウレタンフオーム
とその表面の樹脂ンートとｔ 一体に成形するようにし
たので、真空成形を行う必要がなく、よって、設備の低
廉化と製品表面の美観の向上とを図ることかできる。(Effects of the Invention) As explained below, the method for producing a urethane molded product of the present invention utilizes the foaming pressure and reaction heat generated by the polymerization reaction of the raw material for urethane foam to form a urethane foam and its surface. Since the resin tube and the t are integrally molded, there is no need to perform vacuum forming, thereby making it possible to reduce the cost of equipment and improve the appearance of the product surface.
第１図ないし第４図は本発明の実施例を示し、第１図は
注入型に樹脂ンートをセットするＴ−程を示す断面図、
第２図はウレタンフオーム用原料を注入する工程を示す
断面図、第３図はウレタンフオーム原料を発泡させる工
程を示す断面図、第４図は最終製品の断面図である。第
５図は従来の製造方法を示す図である。
１・・・注入型、２・・・下型、２ａ・・・型面、３・
・・１−型、１０・・・樹脂シート、１２・・・ウレタ
ン成形品。
特 許 出 願 人 西川化成株式会社 −１、
代 理 人 弁理士 前 １） 弘□−１〇
−
第３図
第４図1 to 4 show embodiments of the present invention, and FIG. 1 is a cross-sectional view showing the T-step of setting the resin cartridge in the injection mold;
FIG. 2 is a cross-sectional view showing the step of injecting the raw material for urethane foam, FIG. 3 is a cross-sectional view showing the step of foaming the raw material for urethane foam, and FIG. 4 is a cross-sectional view of the final product. FIG. 5 is a diagram showing a conventional manufacturing method. 1... Injection mold, 2... Lower mold, 2a... Mold surface, 3.
...1-type, 10...resin sheet, 12...urethane molded product. Patent applicant Nishikawa Kasei Co., Ltd. -1,
Agent Patent Attorney Front 1) Hiro□-1〇 - Figure 3 Figure 4
Claims (1)
した後、該樹脂シートと上型との間に高発泡圧を有する
ウレタンフォーム用原料を注入し、該ウレタンフォーム
用原料を発泡させて、その発泡圧により上記樹脂シート
を下型の型面に圧着させつつ、ウレタンフォームと一体
に接合することを特徴とするウレタン成形品の製造方法
。(1) After setting a resin sheet between the lower mold and the upper mold of the injection mold, a urethane foam raw material having a high foaming pressure is injected between the resin sheet and the upper mold, and the urethane foam raw material A method for manufacturing a urethane molded product, which comprises foaming the resin sheet, and using the foaming pressure to press the resin sheet onto the mold surface of a lower mold, and joining the resin sheet integrally with the urethane foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62137917A JPS63302009A (en) | 1987-06-01 | 1987-06-01 | Manufacture of urethane molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62137917A JPS63302009A (en) | 1987-06-01 | 1987-06-01 | Manufacture of urethane molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63302009A true JPS63302009A (en) | 1988-12-08 |
Family
ID=15209704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62137917A Pending JPS63302009A (en) | 1987-06-01 | 1987-06-01 | Manufacture of urethane molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63302009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015054419A (en) * | 2013-09-10 | 2015-03-23 | デルタ工業株式会社 | Method for manufacturing integrated foam molding and integrated foam molding |
-
1987
- 1987-06-01 JP JP62137917A patent/JPS63302009A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015054419A (en) * | 2013-09-10 | 2015-03-23 | デルタ工業株式会社 | Method for manufacturing integrated foam molding and integrated foam molding |
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