JP3100188B2 - Manufacturing method of molded molded products - Google Patents
Manufacturing method of molded molded productsInfo
- Publication number
- JP3100188B2 JP3100188B2 JP03199342A JP19934291A JP3100188B2 JP 3100188 B2 JP3100188 B2 JP 3100188B2 JP 03199342 A JP03199342 A JP 03199342A JP 19934291 A JP19934291 A JP 19934291A JP 3100188 B2 JP3100188 B2 JP 3100188B2
- Authority
- JP
- Japan
- Prior art keywords
- molded
- nonwoven fabric
- thickness
- mold
- 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.)
- Expired - Fee Related
Links
Landscapes
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はモ−ルド成形品の製造方
法に関し、特に自動車用や家具用クッションなどのモ−
ルド成形品の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a molded molded article, and more particularly to a molded article for automobiles and furniture.
The present invention relates to a method for manufacturing a molded product.
【０００２】[0002]
【従来の技術】従来、自動車用や家具用のクッションと
しては、弾性、保温性、軽量性に優れたポリウレタンフ
ォ−ムが用いられ、かかるポリウレタンフォ−ムは例え
ばモ−ルド用型にポリウレタン発泡原液を注入して発泡
成形することにより製造されていた。2. Description of the Related Art Conventionally, polyurethane foams having excellent elasticity, heat retaining property and light weight have been used as cushions for automobiles and furniture. It was manufactured by injecting a stock solution and foam molding.
【０００３】ところで、こうしたクッションとなるウレ
タンフォ−ムは、通常その裏面にバネやフレ−ムなどを
あててアッセンブリするが、使用中の振動や着座時にウ
レタンフォ−ムとバネやフレ−ムなどがこすれて異音が
発生することが多い。この原因は、ウレタンフォ−ムの
表面に形成されるスキンやウレタンフォ−ム自体の摩擦
抵抗が大であるからである。[0003] By the way, such a urethane foam as a cushion is usually assembled by applying a spring or a frame to the back surface thereof. However, the urethane foam and the spring or the frame are used during vibration or seating during use. Scratches often cause abnormal noise. This is because the skin formed on the surface of the urethane foam and the urethane foam itself have a large frictional resistance.
【０００４】こうしたことから、異音を防止するために
上型又は中型に粗毛フェルトや不織布を取り付け、一体
発泡させることも行われている。図３はこうした方法に
より得られたモ−ルド成形品の一例を示し、１はパッド
（クッション本体），２はこのクッション本体１の裏面
に一体的に形成されたフェルト，３はバネ，４はフレ−
ムを示す。[0004] For this reason, in order to prevent abnormal noise, a coarse felt or a non-woven fabric is attached to an upper mold or a middle mold and foamed integrally. FIG. 3 shows an example of a molded molded product obtained by such a method, wherein 1 is a pad (cushion main body), 2 is a felt integrally formed on the back surface of the cushion main body 1, 3 is a spring, and 4 is a spring. Frame
Show the system.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
た従来技術によれば、発泡圧が高く原液が図４のように
裏面まで浸み出すため、完全に異音を防止することがで
きない。このため、図５のようにフレ−ムと当接する位
置に後加工にて粗毛フェルト５を糊付けしたりしている
が、これでは作業性が低下する。However, according to the above-mentioned prior art, since the foaming pressure is high and the undiluted solution infiltrates to the back surface as shown in FIG. 4, abnormal noise cannot be completely prevented. For this reason, as shown in FIG. 5, the coarse felt 5 is glued by post-processing at the position where it comes into contact with the frame, but this reduces the workability.
【０００６】本発明は上記事情に鑑みてなされたもの
で、所定の第１・第２長繊維不織布シ−ト間に適宜な熱
可塑性樹脂不織布シ−トを介在させた３層構造の不織布
を、２ツ割りのモ−ルド型の場合は上型に、３ツ割りの
モ−ルド型の場合は中型に取り付けた後、ポリウレタン
発泡原液を注入，発泡させて一体成形することにより、
バネ，フレ−ム，パイプ等の鋼材とクッション体とのこ
すれに起因する異音を著しく減少しえるモ−ルド成形品
の製造方法を提供することを目的とする。The present invention has been made in view of the above circumstances, and provides a three-layer nonwoven fabric having a suitable thermoplastic resin nonwoven sheet interposed between predetermined first and second long-fiber nonwoven sheets. By attaching it to the upper mold in the case of a two-piece mold type, to the middle mold in the case of a three-piece mold type, injecting and foaming a polyurethane foam stock solution to form an integral mold,
It is an object of the present invention to provide a method of manufacturing a molded molded article capable of significantly reducing abnormal noise caused by rubbing of a cushion, such as a steel material such as a spring, a frame, or a pipe.
【０００７】[0007]
【課題を解決するための手段】本発明は、目付量８０〜
１６０ｇ／ｍ2 ，厚さ１．０〜３．０ｍｍの熱可塑性樹
脂よりなる第１・第２長繊維不織布シ−トと、前記第１
・第２長繊維不織布シ−ト間に配置され目付量３０〜６
０ｇ／ｍ2 ，厚さ０．１〜１．０ｍｍの熱可塑性樹脂不
織布シ−トとからなる３層構造の不織布を、２ツ割りの
モ−ルド型の場合は上型に、３ツ割りのモ−ルド型の場
合は中型に取り付けた後、ポリウレタン発泡原液を注入
し、モ−ルド型を閉じて発泡させて一体成形することを
特徴とするモ−ルド成形品の製造方法である。According to the present invention, a basis weight of 80 to 80 is provided.
160 g / m 2 A first and a second long-fiber non-woven fabric sheet made of a thermoplastic resin having a thickness of 1.0 to 3.0 mm;
.Placed between the second long-fiber nonwoven sheets, the basis weight is 30 to 6
0 g / m 2 A three-layer non-woven fabric made of a thermoplastic resin non-woven fabric sheet having a thickness of 0.1 to 1.0 mm, and an upper mold in the case of a two-piece mold type, and a three-piece mold. In the case of a mold, this is a method for producing a molded molded product, which comprises injecting an undiluted polyurethane foam solution after attaching to a middle mold, closing the molded mold, foaming the molded product, and integrally molding the molded product.
【０００８】本発明において、長繊維不織布シ−トの目
付量，厚みを上記のように限定するのは、以下の通りで
ある。上記範囲の長繊維不織布シ−トは通気性が十分で
あり柔軟性をもち金型に取り付ける場合形状になじみ易
い。又、ウレタン原液が含浸して硬化した場合、製品裏
面の感触が硬くなり過ぎない。In the present invention, the basis weight and thickness of the long-fiber nonwoven fabric sheet are limited as described above as follows. The long-fiber nonwoven fabric sheet in the above range has sufficient air permeability, has flexibility, and easily fits into a shape when attached to a mold. Further, when the urethane stock solution is impregnated and cured, the feel of the back surface of the product does not become too hard.
【０００９】目付量と厚みの関係もあるが、この範囲以
下の場合はウレタン原液の含浸が多く、製品裏面の感触
が著しく硬くなる。また、ウレタン原液が部分的に裏面
に浸み出すため、本来の目的が達っせられない。更に、
以上になると、オ−バ−クオリティだけでなく重量が重
くなってしまう。There is also a relationship between the basis weight and the thickness, but below this range, the urethane stock solution is often impregnated, and the feel of the back surface of the product becomes extremely hard. In addition, since the urethane undiluted solution partially seeps into the back surface, the original purpose cannot be achieved. Furthermore,
Above, not only the over quality but also the weight becomes heavy.
【００１０】本発明において、３層構造の不織布は、第
１・第２長繊維不織布シ−トと熱可塑性樹脂不織布シ−
トを短時間（１〜２秒）加熱圧縮することにより、厚さ
はほとんど変化なく接着できる。また、少し時間をかけ
て加熱圧縮することにより、厚さを減少できる。このよ
うに、温度と時間によって厚さの調整が可能であるが、
元の厚さの５０％以内に止めるのが良い。In the present invention, the nonwoven fabric having a three-layer structure includes a first and a second long-fiber nonwoven fabric sheet and a thermoplastic resin nonwoven fabric sheet.
By heating and compressing the sheet for a short time (1-2 seconds), the thickness can be adhered with almost no change. Further, the thickness can be reduced by heating and compressing for a short time. In this way, the thickness can be adjusted by temperature and time,
It is better to stop within 50% of the original thickness.
【００１１】本発明において、不織布シ−トを構成する
熱可塑性樹脂としては、例えばポリエチレン，ポリスチ
レン，ポリ塩化ビニルなどのビニル樹脂、ポリアミドな
どの鎖状高分子セルロイド等が挙げられる。In the present invention, examples of the thermoplastic resin constituting the nonwoven fabric sheet include vinyl resins such as polyethylene, polystyrene and polyvinyl chloride, and chain polymer celluloids such as polyamide.
【００１２】本発明において、熱可塑性不織布シ−トを
上記のように限定したのは次の通りである。即ち、これ
により通気性を適度におさえ、ウレタン原液の浸み出し
をおさえる。０．１ｍｍ未満の場合は裏面に浸み出して
しまう。１．０ｍｍを越えると、泡ガスの抜けが悪くな
り、モ−ルド品に亀裂やエア溜り等の不具合がを発生さ
せることが多い。In the present invention, the thermoplastic nonwoven sheet is limited as described above as follows. In other words, the air permeability is moderately controlled by this, and the exudation of the urethane stock solution is suppressed. If it is less than 0.1 mm, it will seep out to the back surface. If the thickness exceeds 1.0 mm, the escape of bubble gas becomes poor, and the molded product often suffers from defects such as cracks and air pockets.
【００１３】[0013]
【作用】本発明によれば、所定の第１・第２長繊維不織
布シ−ト間に適宜な熱可塑性樹脂不織布シ−トを介在さ
せた３層構造の不織布を用いることにより、発泡の際発
生するガスがこの不織布からスム−ズに抜け、発泡圧が
従来と比べてかなり減少し、発泡原液が不織布の表面に
浸み出すことを防止できる。従って、モ−ルド成形品の
使用時にクッション体がフレ−ムやバネなどの鋼材と接
触しても、異音が生じることを防止することができる。According to the present invention, a non-woven fabric having a three-layer structure in which an appropriate thermoplastic resin non-woven fabric sheet is interposed between predetermined first and second long-fiber non-woven fabric sheets is used for foaming. The generated gas escapes smoothly from the nonwoven fabric, the foaming pressure is considerably reduced as compared with the conventional one, and it is possible to prevent the undiluted foam solution from seeping into the surface of the nonwoven fabric. Therefore, even when the cushion body comes into contact with a steel material such as a frame or a spring during use of the molded molded product, it is possible to prevent generation of abnormal noise.
【００１４】[0014]
【実施例】以下、本発明の一実施例を図１，図２を参照
して説明する。ここで、図１はモ−ルド成形品の断面
図、図２は図１の部分拡大図を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a sectional view of a molded molded product, and FIG. 2 is a partially enlarged view of FIG.
【００１５】図中の１１は、例えばウレタンフォ−ムか
らなるクッション体を示す。このクッション体１１の裏
面には、３層構造の不織布１２がクッション体１１と一
体に形成されている。ここで、不織布１２は、図２で拡
大して示すように、目付量１２０ｇ／ｍ2 ，厚さ２ｍｍ
の熱可塑性樹脂よりなる第１・第２長繊維不織布シ−ト
１３ａ，１３ｂと、これらの長繊維不織布シ−ト間に配
置された目付量４０ｇ／ｍ2 ，厚さ０．３５ｍｍの熱可
塑性樹脂不織布シ−ト１４とから構成されている。な
お、図中の１５はバネ、１６はフレ−ムを示す。こうし
た構成のモ−ルド成形体は、例えば２ツ割りのモ−ルド
型を用いて次のように製造する。Reference numeral 11 in the drawing denotes a cushion body made of, for example, urethane foam. On the back surface of the cushion body 11, a three-layer nonwoven fabric 12 is formed integrally with the cushion body 11. Here, as shown in an enlarged manner in FIG. 2, the nonwoven fabric 12 has a basis weight of 120 g / m 2. , Thickness 2mm
The first and second long-fiber non-woven fabric sheets 13a and 13b made of the above-mentioned thermoplastic resin, and the weight per unit area of 40 g / m 2 disposed between these long-fiber non-woven fabric sheets , A thermoplastic resin non-woven fabric sheet 14 having a thickness of 0.35 mm. In the drawing, reference numeral 15 denotes a spring, and 16 denotes a frame. A molded molded body having such a configuration is manufactured as follows using, for example, a two-piece molded mold.
【００１６】(1) まず、予め上型の内面に取り付ける３
層構造の不織布１２を用意する。この不織布は、目付量
１２０ｇ／ｍ2 ，厚さ２ｍｍの熱可塑性樹脂よりなる第
１・第２長繊維不織布シ−ト１３ａ，１３ｂ間に、目付
量４０ｇ／ｍ2 ，厚さ０．３５ｍｍの熱可塑性樹脂不織
布シ−ト１４を１〜２秒程度加熱圧縮することにより得
られる。(1) First, 3 to be attached to the inner surface of the upper mold beforehand
A nonwoven fabric 12 having a layer structure is prepared. This nonwoven fabric has a basis weight of 120 g / m 2. The weight between the first and second long-fiber nonwoven fabric sheets 13a and 13b made of a thermoplastic resin having a thickness of 2 mm is 40 g / m 2. , Obtained by heating and compressing a thermoplastic resin nonwoven fabric sheet 14 having a thickness of 0.35 mm for about 1 to 2 seconds.
【００１７】(2) 次に、前記不織布１２を上型の内面に
取り付け、更にフレ−ム１６，バネ１５などをセットす
る。つづいて、下型内にポリウレタン発泡原液を注入し
た後、モ−ルド型を閉じる。更に、この状態で発泡さ
せ、クッション体１１の裏面に不織布１２が一体に形成
され、かつフレ−ム１６，バネ１５が一体化したモ−ル
ド成形品を製造した。(2) Next, the nonwoven fabric 12 is attached to the inner surface of the upper mold, and the frame 16, the spring 15 and the like are set. Subsequently, after injecting the polyurethane foam stock solution into the lower mold, the mold is closed. Further, foaming was performed in this state to produce a molded molded product in which the nonwoven fabric 12 was integrally formed on the back surface of the cushion body 11, and the frame 16 and the spring 15 were integrated.
【００１８】しかして、上記実施例に係るモ−ルド成形
品の製造方法によれば、３層構造の不織布１２を上型内
面に取り付けて発泡を行うため、発泡の際発生するガス
がこの不織布１２からスム−ズに抜ける。従って、発泡
圧が従来と比べてかなり減少し、発泡原液が不織布１２
の表面（第２長繊維不織布シ−ト１３ｂ表面）に浸み出
すことなく、せいぜい中間に位置する熱可塑性樹脂不織
布シ−ト１４に止めることができる。このため、モ−ル
ド成形品の使用時にクッション体１１がフレ−ム１６や
バネ１５と接触しても、異音が生じることを防止するこ
とができる。また、重量も軽く、更に従来の改良例のよ
うにフェルトを貼る等の後加工が不必要となり工数を削
減できる。According to the method for manufacturing a molded molded article according to the above embodiment, since the nonwoven fabric 12 having a three-layer structure is attached to the inner surface of the upper mold and foamed, the gas generated during foaming is generated by the nonwoven fabric. Exit from 12 smoothly. Therefore, the foaming pressure is considerably reduced as compared with the conventional one, and the foaming stock solution becomes nonwoven fabric 12.
At the middle of the thermoplastic resin nonwoven sheet 14 without leaching on the surface (the surface of the second long-fiber nonwoven sheet 13b). Therefore, even when the cushion body 11 comes into contact with the frame 16 or the spring 15 during use of the molded molded product, it is possible to prevent the generation of abnormal noise. Further, the weight is light, and post-processing such as attaching a felt as in the conventional improved example is not required, so that the number of steps can be reduced.
【００１９】[0019]
【発明の効果】以上詳述した如く本発明方法によれば、
所定の第１・第２長繊維不織布シ−ト間に適宜な熱可塑
性樹脂不織布シ−トを介在させた３層構造の不織布を、
２ツ割りのモ−ルド型の場合は上型に、３ツ割りのモ−
ルド型の場合は中型に取り付けた後、ポリウレタン発泡
原液を注入，発泡させて一体成形することにより、バ
ネ，フレ−ム，パイプ等の鋼材とクッション体とのこす
れに起因する異音を完全に減少しえ、更に軽重量で、か
つ工数の削減が可能なモ−ルド成形品をえることができ
る。According to the method of the present invention as described in detail above,
A three-layer nonwoven fabric having an appropriate thermoplastic resin nonwoven fabric sheet interposed between predetermined first and second long-fiber nonwoven fabric sheets;
In the case of a two-part mold type, the upper part is used, and a three-part mold is used.
In the case of the mold type, after installing it in the middle size, the polyurethane foam stock solution is injected, foamed and integrally molded to completely reduce the noise caused by the rubbing between the cushion, the steel material such as springs, frames and pipes. Thus, a molded molded product having a lighter weight and capable of reducing the number of steps can be obtained.
【図１】本発明の一実施例に係るモ−ルド成形品の断面
図。FIG. 1 is a sectional view of a molded molded product according to an embodiment of the present invention.
【図２】図１の要部の拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図３】従来のモ−ルド成形品の断面図。FIG. 3 is a cross-sectional view of a conventional molded product.
【図４】従来の問題点の説明図。FIG. 4 is an explanatory diagram of a conventional problem.
【図５】従来のモ−ルド成形品の改良に関する説明図。FIG. 5 is an explanatory view related to improvement of a conventional molded product.
１１…クッション体、１２…不織布、１３ａ，１３ｂ…
長繊維不織布シ−ト、１４…熱可塑性樹脂不織布シ−
ト、１５…バネ、１６…フレ−ム。11: cushion body, 12: non-woven fabric, 13a, 13b ...
Long fiber non-woven fabric sheet, 14 ... thermoplastic resin non-woven fabric sheet
G, 15 ... spring, 16 ... frame.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｋ 105:08 Ｂ２９Ｌ 31:58 (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 39/10 - 39/12 B29C 39/22 - 39/24 B32B 5/26,27/12 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 identification code FI B29K 105: 08 B29L 31:58 (58) Investigated field (Int.Cl. 7 , DB name) B29C 39/10-39/12 B29C 39/22-39/24 B32B 5 / 26,27 / 12
Claims (1)
０〜３．０ｍｍの熱可塑性樹脂よりなる第１・第２長繊
維不織布シ−トと、前記第１・第２長繊維不織布シ−ト
間に配置され目付量３０〜６０ｇ／ｍ2 ，厚さ０．１〜
１．０ｍｍの熱可塑性樹脂不織布とからなる３層構造の
不織布を、２ツ割りのモ−ルド型の場合は上型に、３ツ
割りのモ−ルド型の場合は中型に取り付けた後、ポリウ
レタン発泡原液を注入し、モ−ルド型を閉じて発泡させ
て一体成形することを特徴とするモ−ルド成形品の製造
方法。1. Weight per unit area of 80 to 160 g / m 2 , Thickness 1.
First and second long-fiber non-woven fabric sheets made of a thermoplastic resin having a thickness of 0 to 3.0 mm, and a weight per unit area of 30 to 60 g / m 2 disposed between the first and second long-fiber non-woven fabric sheets. , Thickness 0.1 ~
After attaching a nonwoven fabric of a three-layer structure composed of a 1.0 mm thermoplastic resin nonwoven fabric to an upper mold in the case of a two-piece mold type, to a middle size in the case of a three-piece mold type, A method for producing a molded molded product, comprising: injecting a polyurethane foam stock solution, closing the molded mold, foaming the molded product, and integrally molding the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03199342A JP3100188B2 (en) | 1991-08-08 | 1991-08-08 | Manufacturing method of molded molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03199342A JP3100188B2 (en) | 1991-08-08 | 1991-08-08 | Manufacturing method of molded molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0542551A JPH0542551A (en) | 1993-02-23 |
| JP3100188B2 true JP3100188B2 (en) | 2000-10-16 |
Family
ID=16406188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03199342A Expired - Fee Related JP3100188B2 (en) | 1991-08-08 | 1991-08-08 | Manufacturing method of molded molded products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3100188B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337061B1 (en) | 1993-07-30 | 2002-01-08 | Nittetsu Mining Co., Ltd. | Method for reclaiming metal sulfate-containing waste sulfuric acid |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2502920Y2 (en) * | 1991-09-13 | 1996-06-26 | ミサワホーム株式会社 | Jigs for self-supporting foundation beams |
| KR102236141B1 (en) * | 2017-09-15 | 2021-04-05 | 주식회사 두올 | Cushion cover sheet for car seat |
-
1991
- 1991-08-08 JP JP03199342A patent/JP3100188B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337061B1 (en) | 1993-07-30 | 2002-01-08 | Nittetsu Mining Co., Ltd. | Method for reclaiming metal sulfate-containing waste sulfuric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542551A (en) | 1993-02-23 |
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