JPH0795971B2 - Method of molding polyurethane sheet pad - Google Patents
Method of molding polyurethane sheet padInfo
- Publication number
- JPH0795971B2 JPH0795971B2 JP2339913A JP33991390A JPH0795971B2 JP H0795971 B2 JPH0795971 B2 JP H0795971B2 JP 2339913 A JP2339913 A JP 2339913A JP 33991390 A JP33991390 A JP 33991390A JP H0795971 B2 JPH0795971 B2 JP H0795971B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- foaming
- liquid
- pad
- hardness
- 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
Landscapes
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、自動車の座席シート等に使用されるポリウレ
タンシートパッドの成形方法に関し、更に詳述すると、
腰掛部の両側又はその周縁部に上記腰掛部より異硬度の
土手部が形成されたポリウレタンシートパッドを成形す
る方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for molding a polyurethane sheet pad used for a seat of an automobile, and the like.
The present invention relates to a method for molding a polyurethane sheet pad in which a bank portion having different hardness is formed on both sides of the seat portion or a peripheral portion of the seat portion.
[従来の技術及び発明が解決しようとする課題] 近年、自動車等の座席シートの製法として、腰掛部の両
側に土手部が設けられたポリウレタンシートパッド(詰
めもの)を表皮材で被覆する方法が多用されており、こ
の場合上記ポリウレタンシートパッドとしては全体が均
一な硬度に形成されたものも用いられるが、両土手部の
硬度を腰掛部の硬度より高くした土手部異硬度ウレタン
シートパッドが体のサポート性向上、表皮材張り上がり
の見栄えの向上等の点で好ましく使用されている。[Prior Art and Problems to be Solved by the Invention] In recent years, as a method of manufacturing a seat for an automobile or the like, a method of covering a polyurethane sheet pad (stuffing) having a bank on both sides of a seat with a skin material has been proposed. It is widely used, and in this case, the polyurethane sheet pad having a uniform hardness as a whole is also used, but a bank portion different hardness urethane sheet pad in which the hardness of both bank portions is higher than the hardness of the sitting portion is used. It is preferably used from the standpoints of improving the supportability and improving the appearance of the upholstery material.
従来、上述した土手部異硬度ポウレタンシートパッドの
製法としては、第13,14図に示す方法が知られている。
即ち、第13図に示す方法は、金型aにキャビティの上記
腰掛部に対応するセンター部bと上記土手部に対応する
サイド部c,cとの境に堰板dを突設し、センター部bに
低硬度の発泡体を得るための発泡原料であるA液、両サ
イド部c,cに高硬度の発泡体を得るための発泡原料であ
るB液をそれぞれ注入し、これらを発泡させる方法であ
る。また、第14図に示す方法は、第13図の金型aにおい
て、両サイド部c,cの底部にそれぞれ金属製の仕切板e,e
を一体に突設するか、発泡樹脂製の仕切板e,eを配置
し、この仕切板e,eの内側にA液、外側にB液をそれぞ
れ注入して発泡を行わせる方法であり、金属製の仕切板
を突設した場合には発泡後にこの仕切板がパッドから除
去され、発泡樹脂製の仕切板を用ちいた場合はこの仕切
板がポリウレタンフォームに固着してパッドに残存する
ものである。Conventionally, a method shown in FIGS. 13 and 14 is known as a method for manufacturing the above-mentioned bank portion different hardness polyurethane sheet pad.
That is, in the method shown in FIG. 13, a weir plate d is projected on a boundary between a center portion b corresponding to the seat portion of the cavity and side portions c and c corresponding to the bank portion in the mold a, Liquid A, which is a foaming raw material for obtaining a foam having a low hardness, is injected into the part b, and liquid B, which is a foaming raw material for obtaining a foam having a high hardness, is injected into both side parts c and c to foam these. Is the way. In addition, the method shown in FIG. 14 is such that, in the mold a of FIG. 13, metal partition plates e, e are provided on the bottoms of both side parts c, c, respectively.
Or the partition plates e, e made of foamed resin are arranged, and the liquid A is injected into the inside of the partition plates e and e, and the liquid B is injected into the outside to perform foaming. When a metal partition plate is projected, this partition plate is removed from the pad after foaming, and when a foam resin partition plate is used, this partition plate sticks to the polyurethane foam and remains on the pad. Is.
しかし、上述した従来の土手部異硬度ウレタンシートパ
ッドの製造方法は、それぞれ次に述べる欠点を有するも
のであった。However, the above-mentioned conventional methods for manufacturing the urethane sheet pad with different hardness of the bank portion have the following drawbacks, respectively.
即ち、第13図の方法で得られたパッドは、第15図に示す
ように土手部f全体が高硬度となるため、着座時にこの
硬い土手部fが腿に当たり、違和感が生じて座り心地が
悪い上、高硬度フォームと低硬度フォームとの接合面が
剥離し易い。また、第14図の方法で得られたパッドは、
土手部fの頂部に第16図に示すように仕切板の抜き取り
溝gが残存したり、第17図に示すように発泡樹脂製の仕
切板eが残存したりするため、着座者が抜き取り溝gや
仕切板eを腿等に感じてしまい、やはり違和感が生じて
座り心地が悪い上、高硬度フォームと低硬度フォームと
の境界面で破れ易い。更に、第14図の方法では、発泡時
にA液及びB液の一部がそれぞれ仕切板e,eを乗り越え
て反対側に移動し、このため高硬度部と低硬度部との境
界が不明瞭となり、品質的にも不安定になると共に、B
液がパッドの裏側部分(第16,17図中hで示す部分)に
十分広がらないため、サポート性、表皮材張り上がり性
の点で不十分になり、しかもA液及びB液の注入のタイ
ミングが難しく、タイミングが合わないと一方の液が仕
切板e,eを乗り越えて反対側に多量に流れてしまい、適
切な品質のパッドを得ることができない。That is, in the pad obtained by the method of FIG. 13, the entire bank portion f has a high hardness as shown in FIG. In addition, the joint surface between the high hardness foam and the low hardness foam is easily peeled off. Also, the pad obtained by the method of FIG.
Since the removal groove g of the partition plate remains on the top of the bank portion f as shown in FIG. 16 or the partition plate e made of foamed resin remains as shown in FIG. The g and the partition plate e are felt on the thighs and the like, which also causes a feeling of strangeness and makes it uncomfortable to sit on. Further, in the method shown in FIG. 14, during foaming, part of the liquids A and B move over the partition plates e, e and move to the opposite side, so that the boundary between the high hardness portion and the low hardness portion is unclear. And becomes unstable in terms of quality, and B
Since the liquid does not spread sufficiently to the back side of the pad (the part indicated by h in Fig. 16 and 17), it becomes insufficient in terms of supportability and skin material swelling, and the timing of injecting A and B liquids. However, if the timing is not correct, one of the liquids will pass over the partition plates e, e and flow in a large amount to the other side, so that a pad of appropriate quality cannot be obtained.
また、上述した土手部異硬度ポリウレタンシートパッド
の別の製法として、金型内の両側壁に発泡ポリスチレン
からなる容器を取り付け、この容器にB液、他の部分に
A液をそれぞれ注入して発泡させると共に、外部加熱や
発泡の反応熱により上記容器を収縮させてA液のポリウ
レタンフォームとB液のポリウレタンフォームとを一体
化する方法も提案されている(特開昭63−25008号公
報)。As another method for manufacturing the above-mentioned embankment part different hardness polyurethane sheet pad, a container made of expanded polystyrene is attached to both side walls in the mold, and liquid B is injected into this container and liquid A is injected into the other parts to foam. At the same time, a method has also been proposed in which the container A is contracted by external heating or the heat of foaming reaction to integrate the polyurethane foam of liquid A and the polyurethane foam of liquid B (JP-A-63-25008).
この製造方法によれば、上記座り心地やサポート性、表
皮材張り上がり性等の問題は改善し得るものの、以下の
欠点を残している。According to this manufacturing method, the above-mentioned problems such as sitting comfort, supportability, and skin material swelling property can be improved, but the following drawbacks remain.
(1)発泡原液中には通常メチレンクロライド等の有機
溶剤が発泡剤として含まれているが、かかる場合、この
溶剤成分により容器を構成する発泡ポリスチレンシート
が原液注入後瞬時に溶解してしまい、発泡原液が容器外
へ流出して原液AとBとを分ける目的を十分に達成し得
ない場合がある。また、この場合液漏れを生じないまで
も容器が極端に軟化してしまい、発泡終了時まで容器を
所定の形状に保持することが困難で、安定的にシートパ
ッドを形成することができない場合が生じる。(1) The foaming stock solution usually contains an organic solvent such as methylene chloride as a foaming agent. In such a case, the foaming polystyrene sheet constituting the container is dissolved by this solvent component immediately after the stock solution is injected, In some cases, the foaming undiluted solution flows out of the container and the purpose of separating the undiluted solutions A and B cannot be sufficiently achieved. Further, in this case, the container is extremely softened even if liquid leakage does not occur, it is difficult to hold the container in a predetermined shape until the end of foaming, and it may be impossible to stably form the seat pad. Occurs.
更に、成形品を成形する場合、原料はモールド内へノズ
ルを通して供給するが、ノズルは原料の供給毎にメチレ
ンクロライド等の有機溶剤で洗浄する。この際、洗浄で
使用した有機溶剤で容器が損傷される場合がある。Further, when molding a molded product, the raw material is supplied into the mold through a nozzle, and the nozzle is washed with an organic solvent such as methylene chloride each time the raw material is supplied. At this time, the container may be damaged by the organic solvent used for cleaning.
(2)また、上記方法では、発泡ポリスチレン容器を熱
収縮させるが、熱収縮した後の容器は、ポリウレタンフ
ォームと同等の可撓性を有していることが好ましい。し
かし、熱収縮後にこのような良好な可撓性が得られるよ
うに調製した発泡ポリスチレンシートで容器を構成した
場合、この容器は熱収縮前の強度が低く、自己支持性が
乏しく、このため発泡原料の注入時等に所定の形状を維
持することが困難である。一方、原料の注入時に十分な
自己支持性が得られるように調製した発泡ポリスチレン
シートで容器を構成した場合、このような容器は、熱収
縮後極めて硬く脆性的なものになってしまい、可撓性や
シートパッドに必要な弾力性が損なわれるだけでなく、
大きな力や変形を受けた時に割れや折れが生じる場合も
ある。(2) Further, in the above method, the expanded polystyrene container is heat-shrinked, but it is preferable that the container after heat-shrinking has flexibility equivalent to that of polyurethane foam. However, when a container is made of expanded polystyrene sheet prepared so that such good flexibility can be obtained after heat shrinkage, the container has low strength before heat shrinkage and poor self-supporting property. It is difficult to maintain a predetermined shape when the raw material is injected. On the other hand, when a container is made of a foamed polystyrene sheet prepared so that sufficient self-supporting property is obtained at the time of injecting the raw material, such a container becomes extremely hard and brittle after heat shrinkage, and is flexible. Not only the elasticity and elasticity required for the seat pad are impaired,
When it receives a large force or deformation, it may crack or break.
本発明は、上記事情に鑑みなされたもので、土手部異硬
度ポリウレタンシートパッドを製造する場合において、
常にポリウレタンフォームと同等の可撓性及びフィーリ
ングを有する液溜め容器を用い、土手部の腿に当たる部
分を柔らかく形成することができ、かつ土手部の頂部に
仕切板の抜き取り溝や仕切板を残存させることがなく、
良好な座り心地が得られ、更に発泡原料の特性を良好に
発揮させることができると共に、硬質部と軟質部とを良
好に接着一体化し得、またこれら異質部間の境界を違和
感なく明瞭かつ安定的に形成するポリウレタンシートパ
ッドの成形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, in the case of manufacturing a bank portion different hardness polyurethane sheet pad,
By using a liquid storage container that always has the same flexibility and feel as polyurethane foam, the part of the embankment that touches the thighs can be formed softly, and the partitioning groove and the partition plate remain on the top of the embankment. Without letting
Good sitting comfort can be obtained, and the characteristics of the foaming raw material can be exhibited satisfactorily, and the hard part and the soft part can be well bonded and integrated, and the boundary between these different parts is clear and stable without a feeling of discomfort. It is an object of the present invention to provide a method for molding a polyurethane sheet pad that is formed in a uniform manner.
[課題を解決するための手段及び作用] 本発明は、上記目的を達成するため、腰掛部の両側又は
周縁部に土手部を有するポリウレタンシートパッドをキ
ャビティに上記腰掛部に対応するセンター部と上記土手
部に対応するサイド部とを有する発泡成形型を用いて成
形する方法において、上記発泡成形型の各サイド部内に
それぞれ発泡ポリプロピレン又は発泡ポリエチレンから
なる液溜め容器を取り付け、これら液溜め容器の間のキ
ャビティに低硬度の発泡体を得るための発泡原液を注入
すると共に、上記液溜め容器に高硬度の発泡体を得るた
めの発泡原液を注入して発泡を行わせることにより、上
記液溜め容器がそのまま内部に残存したポリウレタンシ
ートパッドを得ることを特徴とするポリウレタンシート
パッドの成形方法を提供する。[Means and Actions for Solving the Problems] In order to achieve the above-mentioned object, the present invention uses a polyurethane sheet pad having a bank portion on both sides or a peripheral portion of a seat portion as a cavity and a center portion corresponding to the seat portion and the above. In a method of molding using a foaming mold having a side part corresponding to a bank part, a liquid reservoir made of foamed polypropylene or foamed polyethylene is mounted in each side part of the foaming mold, and a space between these liquid reservoirs is attached. Injecting the undiluted foaming liquid to obtain a low-hardness foam into the cavity, and injecting the undiluted foaming liquid to obtain the high-hardness foam into the liquid reservoir container to cause foaming, A method for molding a polyurethane sheet pad, characterized in that the polyurethane sheet pad remaining inside as is is obtained.
本発明においては、キャビティのサイド部内に発泡ポリ
プロピレン又は発泡ポリエチレンの液溜め容器を設け、
各サイド部の液溜め容器の間のキャビティに低硬度発泡
体用の発泡原液を注入すると共に、上記液溜め容器に高
硬度発泡体用の発泡原液を注入するようにしたので、サ
イド部の底部には低硬度発泡体の原液が流入し、従って
シートパッドの土手部の腿に当たる内側及び頂部が腰掛
部と同様に低硬度発泡体によって形成されるため、腿が
土手部に当たっても硬い感触を与えることがない。ま
た、液溜め容器はパッドの土手部内にそのまま残存し、
頂部には残存しないので、着座者に残存した容器を感じ
させることがない。更に、容器によって両原液が混ざり
あうことが防止され、パッドの高硬度部と低硬度部とが
液溜め容器によって区画されるため、これら高硬度部と
低硬度部との境が所定の位置に明瞭に形成され、品質的
にも安定する。また、液溜め容器の材質を発泡ポリプピ
レン又は発泡ポリエチレンとしたことにより、熱収縮さ
せる必要なく、硬質部と軟質部とを良好に接着一体化す
ることができ、かつこれらの材質からなる容器は適度な
柔軟性と剛性とを兼ね備えているので大きな力や変形を
受けた時でも割れや折れを生じることなく、シートパッ
ドに良好な弾力性を常に与えることができ、しかも製品
に埋設された際に違和感を与えるようなことがない。ま
た、これらの材質からなる容器はメチレンクロライド等
の有機溶剤にも安定であり、発泡原液の配合成分等が制
限されることもなく、所望の発泡原料を用いることがで
き、発泡原料の特性を製品に十分反映させることができ
るものである。In the present invention, a polypropylene polypropylene or polyethylene foam liquid reservoir is provided in the side portion of the cavity,
Since the foaming stock solution for low hardness foam is injected into the cavities between the liquid reservoirs of each side part, and the foaming stock solution for high hardness foam is injected into the above liquid reservoir container, the bottom part of the side part The undiluted solution of low-hardness foam flows into the space. Therefore, the inside and top of the seat pad that touches the thigh is formed by the low-hardness foam as well as the seat. Never. Also, the liquid storage container remains in the bank of the pad,
Since it does not remain on the top, the seated person does not feel the remaining container. Further, the container prevents both undiluted liquids from being mixed with each other, and the high hardness portion and the low hardness portion of the pad are partitioned by the liquid storage container, so that the boundary between the high hardness portion and the low hardness portion is located at a predetermined position. Clearly formed and stable in quality. Further, by using foamed polypropylene or foamed polyethylene as the material of the liquid reservoir, it is possible to satisfactorily bond and integrate the hard part and the soft part without heat shrinking, and a container made of these materials is suitable. Since it has both excellent flexibility and rigidity, it can always give good elasticity to the seat pad without cracking or breaking even when subjected to a large force or deformation, and when it is embedded in the product There is no feeling of strangeness. Further, the container made of these materials is stable to an organic solvent such as methylene chloride, the compounding ingredients of the foaming stock solution are not limited, and a desired foaming raw material can be used. It can be fully reflected in the product.
更に、この液溜め容器の大きさ、形状、板厚、取り付け
位置等を適宜設定することにより高硬度部と低硬度部と
の境界線の形状、位置等を種々変化させることができ、
このためサポート性等のパッドの性能をモールドを何ら
改造することなく任意に調整することができると共に、
液溜め容器の容積を大きくすることにより発泡原液を容
器中に多く溜めることができ、このため発泡原液の注入
タイミングや注入量の精度を緩和することができるもの
である。Further, by appropriately setting the size, shape, plate thickness, mounting position, etc. of this liquid storage container, it is possible to variously change the shape, position, etc. of the boundary line between the high hardness portion and the low hardness portion,
Therefore, the performance of the pad such as support can be adjusted arbitrarily without modifying the mold at all.
By increasing the volume of the liquid storage container, a large amount of the foaming stock solution can be stored in the container, so that the accuracy of the injection timing and the injection amount of the foaming stock solution can be eased.
以下、本発明の一実施例につき図面を参照して説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
[実施例] まず、第1,2図に示すように、キャビティ1にシートパ
ッドの腰掛部に対応するセンター部2と土手部に対応す
るサイド部3,3とを有する発泡成形型4の上記各サイド
部3,3内にそれぞれ発泡ポリプロピレン又は発泡ポリエ
チレンからなる液溜め容器5,5をこれらサイド部3,3の最
低面と離間させた状態で取り付ける。なお、6,6はセン
ター部2とサイド部3,3との境に突設された堰板を示
す。この場合、発泡成形型としては、第1,2図に示した
ようなセンター部2の互いに対向する一方の両側方にサ
イド部3,3が設けられたもの以外に、センター部2の上
記一方両側方に加えて互いに対向する他方の両サイド部
を有する成形型を使用することもでき、この場合上記他
方の両サイド部にも液溜め容器を取り付けることができ
る。また、第3図に示すように上型4a及び下型4bからな
るクローズドモールド4を用い、上型4aに容器5,5を取
り付けることもできる。[Embodiment] First, as shown in FIGS. 1 and 2, the above-described foam molding die 4 having a center portion 2 corresponding to a seat portion of a seat pad and side portions 3 and 3 corresponding to a bank portion is provided in a cavity 1. Liquid reservoirs (5, 5) made of expanded polypropylene or expanded polyethylene are installed in the side parts (3, 3) in a state of being separated from the lowest surfaces of these side parts (3, 3). In addition, 6 and 6 show the weir board which protruded in the boundary of the center part 2 and the side parts 3,3. In this case, as the foaming mold, in addition to the one in which the side portions 3 and 3 are provided on both sides of the center portion 2 facing each other as shown in FIGS. It is also possible to use a molding die which has not only both sides but also the other side portions facing each other, and in this case, the liquid reservoir can be attached to the other both side portions. Further, as shown in FIG. 3, the closed mold 4 including the upper mold 4a and the lower mold 4b may be used, and the containers 5 and 5 may be attached to the upper mold 4a.
ここで、上記液溜め容器5の形状としては、特に制限さ
れるものではないが、底部がアーチ状に形成されたもの
を用いることが好ましい。即ち、第4図のように底部が
アーチ状の中空半球形容器5を用いてシートパッド7を
成形した場合と、第5図のように底部がフラット状の容
器5を用いてシートパッド7を成形した場合とを比較す
ると、境界層8の幅、ボリュームが等しくても第4図の
ものは第5図のものに比べて外力Fに対する抵抗力が強
く、従ってサポート性が高くなる。Here, the shape of the liquid reservoir 5 is not particularly limited, but it is preferable to use a container having an arched bottom. That is, as shown in FIG. 4, the seat pad 7 is formed by using the hollow hemispherical container 5 having an arch-shaped bottom, and when the seat pad 7 is formed by using the container 5 having a flat bottom as shown in FIG. Comparing with the case of molding, even if the width and volume of the boundary layer 8 are the same, the one of FIG. 4 has a stronger resistance to the external force F than the one of FIG. 5, and therefore the supportability becomes higher.
この液溜め容器としては、第1,2図の容器のように液溜
め部5aと取り付け部5bとが連設されたものを用いること
が好適で、これにより容器5をサイド部3の外側壁に容
易に取り付けることができるが、第6図(A),(B)
に示すように液溜め部5aのみからなる容器又は液溜め部
5aに小さな取り付け片5cを連設した容器をピン等を用い
て成形型のモールド内に取り付けることもできる。即
ち、第7図(A),(B)に示したように成形型4のサ
イド部3の外側壁に配設された取り付けピン3a,3a,3aに
液溜め容器5の一側部を取り付けると共に、取り付け片
5cを堰板6上に突設されたピン6aに取り付けることによ
り容器5を成形型のモールド内に取り付けたり、又は第
8図に示したようにサイド部3の中央部に支え棒3bを配
設し、この支え棒3b先端部に突設されたピン3cに液溜め
部5aを取り付けることにより容器5をモールド内に取り
付けることができる。更にこの場合、取り付け片5cを設
けたときは、この取り付け片5cを第7図に示したものと
同様に堰板6のピン6aに取り付けることができる。As this liquid storage container, it is preferable to use a container in which a liquid storage part 5a and a mounting part 5b are connected in series like the container shown in FIGS. Can be easily attached to, but Fig. 6 (A), (B)
As shown in Figure 5, a container or liquid reservoir consisting only of the liquid reservoir 5a
It is also possible to mount a container in which a small mounting piece 5c is connected to 5a in a mold of a molding die using a pin or the like. That is, as shown in FIGS. 7A and 7B, one side portion of the liquid reservoir 5 is attached to the attachment pins 3a, 3a, 3a arranged on the outer wall of the side portion 3 of the molding die 4. With the mounting piece
The container 5 is mounted in the mold of the molding die by attaching 5c to the pin 6a protruding on the barrier plate 6, or the support rod 3b is arranged in the central portion of the side portion 3 as shown in FIG. The container 5 can be mounted in the mold by mounting the liquid reservoir 5a on the pin 3c protruding from the tip of the support rod 3b. Further, in this case, when the attachment piece 5c is provided, the attachment piece 5c can be attached to the pin 6a of the dam plate 6 as in the case shown in FIG.
また、第9図に示したように、取り付け部5bと取り付け
片5cとの両方を有する容器5を用い、その取り付け部5b
をクローズドモールド4のインロー部(すり合わせ部)
4cに設けられたピン3dに取り付け、かつ取り付け片5cを
堰板6に設けられたピン6aに取り付けて容器5をサイド
部3内に配設することもできる。この場合、容器5は柔
軟性に優れる発泡ポリプロピレン又は発泡ポリエチレン
で形成されているので、取り付け部5bがモールドのイン
ロー部4cに挟まってもクローズドモールドのシール性を
損なうことはない。Further, as shown in FIG. 9, the container 5 having both the mounting portion 5b and the mounting piece 5c is used, and the mounting portion 5b is used.
The spigot part of the closed mold 4 (grinding part)
It is also possible to mount the container 5 in the side portion 3 by attaching it to the pin 3d provided on the 4c and attaching the attaching piece 5c to the pin 6a provided on the barrier plate 6. In this case, since the container 5 is made of expanded polypropylene or expanded polyethylene having excellent flexibility, the sealing property of the closed mold is not impaired even if the mounting part 5b is sandwiched between the spigot parts 4c of the mold.
この容器取り付けの際、容器5はサイド部3の外側壁と
離間して配設することができ、これによって第10図に示
すように容器5がパッド7の外側面に現れないようにす
ることができるが、このとき容器5の横ずれや容器5が
外側壁に接触するのを防止するため、第7図(B)に示
したように支え棒9aや支え片9bをサイド部3内に配設す
ることができる。なお、上記取り付けピン3a,6a及び支
え棒9aや支え片9bは、針状又は細棒状であるので、座り
心地を損なうような大きな穴や溝を形成するようなこと
はない。At the time of mounting the container, the container 5 can be arranged apart from the outer wall of the side portion 3 so that the container 5 does not appear on the outer surface of the pad 7 as shown in FIG. However, in order to prevent lateral displacement of the container 5 and contact of the container 5 with the outer wall at this time, the support rod 9a and the support piece 9b are arranged in the side portion 3 as shown in FIG. 7 (B). Can be installed. Since the mounting pins 3a and 6a and the support rod 9a and the support piece 9b are needle-shaped or thin rod-shaped, they do not form a large hole or groove that impairs sitting comfort.
更に、容器5としては、第1図に示すように液溜め部5a
の幅lがサイド部の全幅の20〜100%、特に40〜80%、
深さmがサイド部の全深さの10〜100%、特に30〜80
%、板厚が1〜6mm、特に1〜4mmのものが好ましく、こ
れによりサポート性を向上させることができる。なお、
容器5の取り付け位置は、サイド部3の底部と容器5下
端との距離nを0〜6cm、特に1〜6cm、更に好ましくは
2〜6cmとすることがサポート性の点で望ましい。Further, as the container 5, as shown in FIG.
Width l is 20-100% of the total width of the side part, especially 40-80%,
The depth m is 10 to 100% of the total depth of the side part, especially 30 to 80
%, And a plate thickness of 1 to 6 mm, especially 1 to 4 mm is preferable, and thereby supportability can be improved. In addition,
Regarding the mounting position of the container 5, the distance n between the bottom of the side part 3 and the lower end of the container 5 is preferably 0 to 6 cm, particularly 1 to 6 cm, and more preferably 2 to 6 cm from the viewpoint of supportability.
また容器の容積は0.8〜2.5lとすることが好適で、これ
により発泡原液の注入タイミング、注入量の精度を緩和
し、生産性を向上させることができる。更に、容器の内
外表面に凹凸加工を施し、表面積を増加させてウレタン
フォームとの接着強度をより良好なものとすることもで
きる。Further, the volume of the container is preferably 0.8 to 2.5 liters, whereby the accuracy of the injection timing and the injection amount of the foaming stock solution can be relaxed and the productivity can be improved. Further, the inner and outer surfaces of the container may be processed to have an uneven surface to increase the surface area, thereby improving the adhesive strength with the urethane foam.
次に、液溜め容器5,5間のキャビティに低硬度発泡体用
の発泡原液(以下A液という)を注入すると共に、液溜
め容器5,5に高硬度発泡体用の発泡原液(以下B液とい
う)を注入して発泡を行わせる。Next, a foaming stock solution for low-hardness foam (hereinafter referred to as "A liquid") is injected into the cavity between the liquid storage containers 5, 5, and a foaming stock solution for high-hardness foam (hereinafter referred to as B solution) is placed in the liquid storage containers 5, 5. It is called liquid and is injected to cause foaming.
この場合、A液は第11図に示すように堰板6の上方から
センター部2及びサイド部3に流すようにしてもよく、
第12図に示すようにセンター部2とサイド部3に別々に
注入するようにしてもよい。In this case, the liquid A may be caused to flow from above the dam plate 6 to the center portion 2 and the side portion 3 as shown in FIG.
As shown in FIG. 12, the center portion 2 and the side portion 3 may be separately injected.
また、発泡原液としては軟質、半硬質、硬質ポリウレタ
ンフォームの発泡原料として公知の組成のものを使用で
き、メチレンクロライド等の有機溶剤が発泡剤として配
合されたものも好適に使用し得るが、特にA液は発泡後
のプッシュプルゲージ(アイコーエンジニアリング社
製)による硬度が10〜20kg/φ200となるもの,B液は発泡
後の同硬度が1.8〜4kg/φ200となるものを用いることが
望ましく、これによりサポート性を高めることができ
る。Further, as the foaming undiluted solution, soft, semi-rigid, those having a known composition as a foaming raw material of rigid polyurethane foam can be used, and those in which an organic solvent such as methylene chloride is blended as a foaming agent can also be preferably used, It is desirable to use liquid A which has a push-pull gauge (made by Aiko Engineering Co., Ltd.) of 10 to 20 kg / φ200 after foaming, and liquid B which has the same hardness of 1.8 to 4 kg / φ200 after foaming. This can enhance supportability.
このように発泡ポリプロピレン又は発泡ポリエチレンか
らなる液溜め容器5を発泡成形型4のサイド部3,3内に
配設し、この容器5内にB液、容器5以外のキャビティ
1内にA液を注入し、これらを発泡させることにより、
硬質部と軟質部とが良好に一体化し、しかもこれら異質
部間の境界が明瞭かつ安定的に形成されたうえ、座り心
地も良好で、しかも発泡原料の特性が良好に発揮された
土手部位異硬度ポリウレタンシートパッドを確実に製造
することができる。In this way, the liquid reservoir container 5 made of expanded polypropylene or expanded polyethylene is arranged in the side parts 3, 3 of the foaming mold 4, and the liquid B is placed in the container 5 and the liquid A is placed in the cavity 1 other than the container 5. By injecting and foaming these,
The hard part and the soft part are well integrated, and the boundary between these different parts is formed clearly and stably, and the sitting comfort is good, and the characteristics of the foaming raw material are good. The hardness polyurethane sheet pad can be reliably manufactured.
即ち、上記製造方法によれば、成形型4のサイド部3底
部には低硬度発泡体用のA液が流入してシートパッドの
土手部の腿に当たる内側部及び頂部が腰掛部と同様に低
硬度発泡体によって形成されるため、腿が土手部に当た
っても硬い感触を与えることがなく、かつ容器5はパッ
ドの土手部内に残存し、頂部には残存しないので、着座
者に残存した容器を感じさせることがなく、しかも容器
5によって発泡原料のA液とB液とが混ざりあうことが
防止され、パッドの高硬度部と低硬度部とが容器5によ
って確実に区画されて両硬度部の境が所定の位置に明瞭
に形成され、品質的にも安定する。しかも、容器5が発
泡ポリプロピレン又は発泡ポリエチレンで形成されてい
るので、この容器5を熱収縮させることなく高硬度部と
低硬度部とが良好に接着一体化し、かつこの容器5は適
度な剛性と柔軟性とを兼ね備えているので、大きな力や
変形を受けた時でも割れや折れ等を生じることなく、シ
ートパッドの土手部に良好な弾力性を常に与えることが
できる。また、この容器5は有機溶剤にも安定で、発泡
原液の配合成分等が制限されることもなく、所望の発泡
原料を用い、その発泡原料(A液,B液)の特性を製品に
十分反映し得るものである。更に、容器5を発泡ポリエ
チレンにて形成した場合には、上記効果に加え、従来の
発泡ポリスチレン製容器を用いた製造方法に比べてコス
ト点にも有利となる。That is, according to the above-described manufacturing method, the liquid A for low hardness foam flows into the bottom of the side portion 3 of the molding die 4, and the inner portion and the top portion which hit the thigh of the bank portion of the seat pad are as low as the seat portion. Since it is formed of a hardness foam, the thigh does not give a hard feel even when it hits the bank, and the container 5 remains in the bank of the pad and not at the top, so the seated person can feel the remaining container. In addition, it is possible to prevent the A liquid and the B liquid of the foaming raw material from being mixed with each other by the container 5, and the high hardness portion and the low hardness portion of the pad are surely partitioned by the container 5 so that the boundary between the both hardness portions is high. Is clearly formed at a predetermined position, and the quality is stable. Moreover, since the container 5 is formed of expanded polypropylene or expanded polyethylene, the high hardness portion and the low hardness portion are well bonded and integrated without heat shrinking the container 5, and the container 5 has an appropriate rigidity. Since it also has flexibility, good elasticity can always be given to the bank portion of the seat pad without cracking or breaking even when subjected to a large force or deformation. Further, this container 5 is stable to an organic solvent, and the components to be mixed in the foaming stock solution are not limited. A desired foaming raw material is used, and the characteristics of the foaming raw material (liquid A, liquid B) are sufficient for the product. It can be reflected. Further, when the container 5 is made of expanded polyethylene, in addition to the above effects, it is more advantageous in terms of cost than the conventional manufacturing method using a expanded polystyrene container.
なお、本発明のポリウレタンシートパッドの成形方法
は、上記実施例に限定されるものではなく、例えば上記
実施例では、各サイド部に1個づつ液溜め容器を設けた
が、必要に応じ各サイド部にそれぞれ2個以上の液溜め
容器を設け、これら複数の液溜め容器にそれぞれ同じ発
泡原液を注入したり、互いに特性の異なる発泡原液を注
入したりすることもでき、更に液溜め容器の形状や成形
型の形状等は本発明の要旨の範囲内において種々変更し
てさしつかえない。The method for molding the polyurethane sheet pad of the present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, one liquid reservoir container is provided at each side portion, but if necessary, each side container is provided. It is also possible to provide two or more liquid reservoirs in each part, and to inject the same foaming raw liquid into these plural liquid reservoirs, or to inject the foaming raw liquids having different characteristics from each other. The shape and the like of the molding die may be variously modified within the scope of the present invention.
[発明の効果] 以上説明したように、本発明は下記効果を奏する。[Effects of the Invention] As described above, the present invention has the following effects.
土手部の腿に当たる内側部及び頂部が柔らかく、座
り心地の良いシートパッドを得ることができる。It is possible to obtain a seat pad that has a soft inner portion and a top portion that touch the thighs of the bank portion and that is comfortable to sit on.
残存した液溜め容器を着座者に感じさせず、違和感
を与えることのないシートパッドを得ることができる。It is possible to obtain a seat pad that does not give an uncomfortable feeling to a seated person without making the seated person feel the remaining liquid storage container.
高硬度発泡体原液と低硬度発泡体原液とが互いに混
ざりあうことを防止できるため、高硬度部と低硬度部と
の境界を明瞭に、かつ所定の位置に安定して形成するこ
とができ、従って品質の安定したシートパッドを得るこ
とができる。Since it is possible to prevent the high-hardness foam undiluted solution and the low-hardness foam undiluted solution from being mixed with each other, the boundary between the high-hardness portion and the low-hardness portion can be clearly formed and stably formed at a predetermined position, Therefore, a seat pad with stable quality can be obtained.
高硬度部と低硬度部とが良好に接着一体化したシー
トパッドが得られる。It is possible to obtain a seat pad in which the high hardness portion and the low hardness portion are well bonded and integrated.
液溜め容器の形状、大きさ、板厚、取り付け位置を
適宜設定することにより、サポート性等のシートパッド
の性能を任意に調節することができる。By appropriately setting the shape, size, plate thickness, and mounting position of the liquid storage container, the performance of the seat pad such as supportability can be arbitrarily adjusted.
液溜め容器の容積を大きくすることにより発泡原液
の注入タイミング及び注入量の精度を緩和することがで
き、従って生産性を向上させることができる。By increasing the volume of the liquid storage container, the accuracy of the injection timing and the injection amount of the foaming stock solution can be relaxed, and therefore the productivity can be improved.
上記,の調節は、モールドを何ら改造すること
なく容器の形状を変えるだけで容易に行うことができ
る。The above adjustment can be easily performed by changing the shape of the container without modifying the mold.
パッド側端部を硬くすることにより、パッドの輪郭
を明瞭にし、かつシート表皮張り上がり外観を向上させ
ることができる。By making the pad side end portion hard, the contour of the pad can be clarified and the appearance of the seat skin can be improved.
発泡原料の配合成分が制限されることはなく、所望
の原料を用いることができると共に、液溜め容器内に注
入した発泡原料の特性を良好に製品に反映させることが
できる。There is no limitation on the blending component of the foaming raw material, a desired raw material can be used, and the characteristics of the foaming raw material injected into the liquid storage container can be well reflected in the product.
液溜め容器に容易に割れや折れが生じるようなこと
がなく、安定した弾力性及び良好な座り心地を確実に得
ることができる。It is possible to surely obtain stable elasticity and good sitting comfort without causing the liquid reservoir container to be easily cracked or broken.
第1図は本発明の実施に用いる成形型の一例を示す断面
図、第2図は同成形型の平面図、第3図は成形型の他の
例を示す断面図、第4図及び第5図はそれぞれ本発明に
より得られたシートパッドを示す一部省略断面図、第6
図(A),(B)は容器の他の例を示す斜視図、第7図
(A),(B)乃至第9図はそれぞれ液溜め容器の取り
付け態様を示すもので第7図(A)は部分平面図、第7
図(B)は第7図(A)のB−B線に沿った断面図、第
8図及び第9図はそれぞれ他の取り付け態様を示す断面
図、第10図はパッドの他の例を示す断面図、第11図及び
第12図はそれぞれ本発明において発泡原液を注入する状
態を示す説明図、第13図及び第14図はそれぞれ従来の成
形方法を示す説明図、第15〜17図はそれぞれ従来法で得
られたシートパッドを示す一部省略断面図である。 1……キャビティ、2……センター部、3……サイド
部、4……発泡成形型、5……液溜め容器。FIG. 1 is a sectional view showing an example of a molding die used for carrying out the present invention, FIG. 2 is a plan view of the molding die, FIG. 3 is a sectional view showing another example of the molding die, FIG. 4 and FIG. FIG. 5 is a partially omitted sectional view showing a seat pad obtained by the present invention, respectively.
Figures (A) and (B) are perspective views showing other examples of the container, and Figures 7 (A), (B) to 9 show the mounting mode of the liquid reservoir, respectively. ) Is a partial plan view, 7th
7B is a sectional view taken along line BB in FIG. 7A, FIGS. 8 and 9 are sectional views showing other mounting modes, and FIG. 10 is another example of a pad. Sectional views showing, FIG. 11 and FIG. 12 are explanatory views showing a state of injecting a foaming stock solution in the present invention, FIG. 13 and FIG. 14 are explanatory views showing a conventional molding method, respectively, and FIGS. FIG. 3 is a partially omitted sectional view showing a seat pad obtained by a conventional method. 1 ... Cavity, 2 ... Center part, 3 ... Side part, 4 ... Foaming mold, 5 ... Liquid reservoir.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B29L 31:58 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29L 31:58
Claims (1)
ポリウレタンシートパッドをキャビティに上記腰掛部に
対応するセンター部と上記土手部に対応するサイド部と
を有する発泡成形型を用いて成形する方法において、上
記発泡成形型の各サイド部内にそれぞれ発泡ポリプロピ
レン又は発泡ポリエチレンからなる液溜め容器を取り付
け、これら液溜め容器の間のキャビティに低硬度の発泡
体を得るための発泡原液を注入すると共に、上記液溜め
容器に高硬度の発泡体を得るための発泡原液を注入して
発泡を行わせることにより、上記液溜め容器が内部にそ
のまま残存したポリウレタンシートパッドを得ることを
特徴とするポリウレタンシートパッドの成形方法。1. A polyurethane sheet pad having a bank on both sides or a peripheral edge of a stool is molded in a cavity using a foaming mold having a center part corresponding to the stool and a side part corresponding to the bank. In the method described above, a liquid storage container made of expanded polypropylene or expanded polyethylene is attached in each side part of the foaming mold, and a foaming stock solution for obtaining a low-hardness foam is injected into a cavity between the liquid storage containers. At the same time, a polyurethane sheet pad in which the liquid storage container remains as it is inside is obtained by injecting a raw foaming liquid for obtaining a high-hardness foam into the liquid storage container to perform foaming. Sheet pad molding method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2339913A JPH0795971B2 (en) | 1989-12-08 | 1990-11-30 | Method of molding polyurethane sheet pad |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1-319986 | 1989-12-08 | ||
JP31998689 | 1989-12-08 | ||
JP2339913A JPH0795971B2 (en) | 1989-12-08 | 1990-11-30 | Method of molding polyurethane sheet pad |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03261410A JPH03261410A (en) | 1991-11-21 |
JPH0795971B2 true JPH0795971B2 (en) | 1995-10-18 |
Family
ID=26569902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2339913A Expired - Lifetime JPH0795971B2 (en) | 1989-12-08 | 1990-11-30 | Method of molding polyurethane sheet pad |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0795971B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06126755A (en) * | 1992-10-15 | 1994-05-10 | Bridgestone Corp | Method for molding polyurethane sheet pad |
JP4235930B2 (en) * | 1999-07-27 | 2009-03-11 | 株式会社イノアックコーポレーション | Foam mold and sheet pad manufacturing method using the foam mold |
JP5117161B2 (en) * | 2007-10-26 | 2013-01-09 | 株式会社イノアックコーポレーション | Foam molding method |
JP7042813B2 (en) * | 2017-05-16 | 2022-03-28 | 株式会社ブリヂストン | Foam molding mold and manufacturing method of foam molded body |
-
1990
- 1990-11-30 JP JP2339913A patent/JPH0795971B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03261410A (en) | 1991-11-21 |
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