JP2003094452A - Molding method for seat cushion pad, and molding die used for the same - Google Patents
Molding method for seat cushion pad, and molding die used for the sameInfo
- Publication number
- JP2003094452A JP2003094452A JP2001289123A JP2001289123A JP2003094452A JP 2003094452 A JP2003094452 A JP 2003094452A JP 2001289123 A JP2001289123 A JP 2001289123A JP 2001289123 A JP2001289123 A JP 2001289123A JP 2003094452 A JP2003094452 A JP 2003094452A
- Authority
- JP
- Japan
- Prior art keywords
- molding region
- molding
- seat cushion
- cushion pad
- region
- 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.)
- Withdrawn
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として自動車を
初めとする車両用シートに用いられるシートクッション
パッドの成形方法及びその成形に使用する成形型に関す
る。詳しくは、センターサポート部の幅方向両側に該セ
ンターサポート部の表面よりも前方へ向けて隆起するサ
イドサポート部が連設されてなるシートクッションパッ
ドの成形方法であって、サイドサポート部のうちそれの
外端縁側に臨み略円弧状に湾曲する表面を有する外側サ
ポート部が高硬度に、かつ、センターサポート部及びサ
イドサポート部のうちセンターサポート部に隣接する内
側サポート部が中硬度になるように、それら各部を形成
する成形型の各成形領域に、予め硬度の異なる成分に調
整配合されたポリウレタン原液等の液状発泡性樹脂材料
を各別に注入し発泡することにより、内外に異硬度部分
を持つシートクッションパッドを一体に成形するシート
クッションパッドの成形方法及びその成形に使用される
成形型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 molding a seat cushion pad mainly used for vehicle seats including automobiles and a molding die used for the molding. Specifically, it is a method for forming a seat cushion pad, in which side support portions that are bulged toward the front of the surface of the center support portion are continuously provided on both sides in the width direction of the center support portion, and the method is a method for forming a seat cushion pad. The outer support part having a surface which is curved in an arc shape facing the end edge side has high hardness, and the inner support part adjacent to the center support part of the center support part and the side support parts has medium hardness. A seat cushion pad having different hardness parts inside and outside by injecting liquid foamable resin materials such as polyurethane stock solution, which are preliminarily adjusted and blended into components having different hardness, into the respective molding regions of the molding die for forming and foaming. The present invention relates to a method for molding a seat cushion pad for integrally molding a tire and a molding die used for the molding. That.
【０００２】[0002]
【従来の技術】図４は、乗員の下半身をホールドするシ
ートクッションパッド４０を例示するもので、このシー
トクッションパッド４０は、基本的に乗員の着座時に臀
部が接触するセンターサポート部４１とその幅方向両側
に配置されセンターサポート部４１の表面４１ａよりも
前方（上方）へ向けて隆起するサイドサポート部４２，
４２とからなる。このようなシートクッションパッド４
０において、たとえばコーナリング走行時等に乗員が左
右方向に揺れ動かないような安定よい着座姿勢を保つサ
イドサポート性を高めるために、上記両サイドサポート
部４２，４２のうち、それの外端縁側に臨み略円弧状に
湾曲する表面４２ａを有する外側サポート部４２Ａ，４
２Ａ（図４の斜線挿入部分）は高硬度成分の発泡性樹脂
材料により発泡成形され、それ以外のセンターサポート
部４１及び両サイドサポート部４２，４２のうち、セン
ターサポート部４１に隣接する内側サポート部４２Ｂ，
４２Ｂは中硬度成分の発泡性樹脂材料により発泡成形さ
れる。2. Description of the Related Art FIG. 4 illustrates a seat cushion pad 40 for holding the lower body of an occupant. The seat cushion pad 40 basically has a center support portion 41 and a width thereof which a buttocks come into contact with when the occupant is seated. Side support portions 42 arranged on both sides in the direction and protruding forward (upward) from the surface 41a of the center support portion 41,
42 and. Such a seat cushion pad 4
At 0, for example, in order to improve side support properties for maintaining a stable sitting posture such that the occupant does not swing in the left-right direction when cornering, etc., the side end portions of the both side support portions 42, 42 are exposed to the outer edge side thereof. Outer support portions 42A, 4 having a surface 42a curved in an arc shape
2A (the hatched portion in FIG. 4) is foam-molded with a foaming resin material having a high hardness component, and of the other center support portion 41 and both side support portions 42, 42, the inner support portion adjacent to the center support portion 41. 42B,
42B is foam-molded with a foaming resin material having a medium hardness component.
【０００３】ところで、上記したような異硬度部分を持
つシートクッションパッド４０を成形するにあたって使
用される従来一般の成形型５０は、図５に示すように、
中子型５８を備えた上型５１と下型５２とを型閉め及び
型開き可能に構成してなる。そのうち下型５２は、図６
に示すように、シートクッションパッド４０を構成する
センターサポート部４１及び両サイドサポート部４２，
４２の形状に合致するキャビティ５３が形成されている
とともに、センターサポート部４１と両サイドサポート
部４２，４２の境界部分に図示省略の表皮材を引張り固
定するための溝４３，４３（図４参照）を形成する突片
部５４，５４が上方に向けて突出形成されており、これ
ら突片部５４，５４により、上記キャビティ５３がセン
ターサポート部４１を形成する第１成形領域５５と両サ
イドサポート部４２，４２を形成する二つの第２成形領
域５６，５６に区画形成されている。By the way, as shown in FIG. 5, a conventional general molding die 50 used for molding the seat cushion pad 40 having the different hardness portion as described above, is shown in FIG.
An upper die 51 and a lower die 52 each having a core die 58 are configured to be mold-closeable and mold-openable. The lower mold 52 is shown in FIG.
As shown in, the center support portion 41 and both side support portions 42, which constitute the seat cushion pad 40,
A cavity 53 conforming to the shape of 42 is formed, and grooves 43, 43 for pulling and fixing a skin material (not shown) at the boundary between the center support portion 41 and the side support portions 42, 42 (see FIG. 4). Projecting portions 54, 54 forming the above are formed so as to project upward, and by these projecting piece portions 54, 54, the cavity 53 forms the center support portion 41 and the first molding region 55 and both side support portions 42. , 42 forming two second molding regions 56, 56.
【０００４】また、上記二つの第２成形領域５６，５６
の略中央部には、これら第２成形領域５６，５６を、シ
ートクッションパッド４０の高硬度外側サポート部４２
Ａ，４２Ａを形成する外側成形領域５６Ａ，５６Ａと中
硬度内側サポート部４２Ｂ，４２Ｂを形成する内側成形
領域５６Ｂ，５６Ｂとに区画する縦断面直線形の仕切り
壁５７，５７が第２成形領域５６，５６の長手方向に沿
いほぼ直線状態に延在させてキャビティ底面に突設され
ている。Further, the two second molding regions 56, 56 are also provided.
These second molding regions 56, 56 are provided at substantially the center of the high hardness outer support portion 42 of the seat cushion pad 40.
A, 42A forming outer molding regions 56A, 56A and inner hardness forming inner support regions 42B, 42B forming inner molding regions 56B, 56B partition wall 57, 57 having a vertical cross-section, the second molding region 56. , 56 extending in a substantially straight line along the longitudinal direction of the ridges 56, and protrudingly provided on the bottom surface of the cavity.
【０００５】そして、上記成形型５０における下型５２
の第２成形領域５６，５６のうちの外側成形領域５６
Ａ，５６Ａには、注入装置の注入ヘッド６１を介して予
め高硬度成分に調整配合されたポリウレタン原液等の液
状発泡性樹脂材料を、かつ、第１成形領域５５及び第２
成形領域５６，５６のうちの内側成形領域５６Ｂ，５６
Ｂには、注入装置の注入ヘッド６２を介して予め中硬度
成分に調整配合されたポリウレタン原液等の液状発泡性
樹脂材料を、時間的に相前後して各別に注入し発泡する
ことにより、図４に示したような異硬度部分を持つシー
トクッションパッド４０を一体に成形する。Then, the lower mold 52 in the molding mold 50.
Outer molding region 56 of second molding regions 56, 56 of
A and 56A are liquid foamable resin materials, such as a polyurethane stock solution, which have been adjusted and blended into high hardness components in advance via the injection head 61 of the injection device, and the first molding region 55 and the second molding region 55.
Inner molding regions 56B and 56 of the molding regions 56 and 56
In B, a liquid foamable resin material such as a polyurethane stock solution which has been adjusted and blended into a medium hardness component in advance through an injection head 62 of an injection device is injected separately and foamed in chronological order. The seat cushion pad 40 having the different hardness portion as shown in 4 is integrally molded.
【０００６】しかしながら、上記のような成形型５０を
用いる従来一般のシートクッションパッドの成形方法に
よる場合は、シートクッションパッド４０の両サイドサ
ポート部４２，４２の外周端縁部が長手方向に沿って大
きく湾曲した形状であるために、下型５２のキャビティ
５３の外側面上半部分が外側成形領域５６Ａ，５６Ａを
覆い被さるように型内方へ延出した形状を呈している。
このため、図７に明示するように、下型５２の上部開口
縁部５２ｅと仕切り壁５７との横方向の間隔寸法Ｗが注
入ヘッド６１の直径Ｄよりも小さくなり、従って、下型
５２の上部開口縁部５２ｅとの干渉を回避する位置に注
入ヘッド６１を下降させて外側成形領域５６Ａに高硬度
成分の液状発泡性樹脂材料Ｕを注入する際、注入ヘッド
６１の一部が内側成形領域５６Ｂにはみ出すために、注
出された液状発泡性樹脂材料Ｕの一部がその内側成形領
域５６Ｂへ流入して中硬度成分の液状発泡性樹脂材料と
の混在部分が発生し、その結果、高硬度部分と中硬度部
分との境界が不明確になるだけでなく、注入ヘッド６１
からは予め設定された一定量の高硬度成分の液状発泡性
樹脂材料Ｕが外側成形領域５６Ａへ向けて注出されたに
もかかわらず、実際の注入量は減量されて品質的にも形
状的にも所定どおりの高硬度外側サポート部４２Ａを成
形することができないという不都合がある。However, in the case of the conventional general seat cushion pad forming method using the forming die 50 as described above, the outer peripheral edge portions of the side support portions 42, 42 of the seat cushion pad 40 are large along the longitudinal direction. Due to the curved shape, the upper half of the outer surface of the cavity 53 of the lower mold 52 has a shape extending inwardly of the mold so as to cover the outer molding regions 56A and 56A.
Therefore, as clearly shown in FIG. 7, the lateral dimension W between the upper opening edge portion 52e of the lower die 52 and the partition wall 57 becomes smaller than the diameter D of the injection head 61, and thus the lower die 52 has a smaller diameter. When the injection head 61 is lowered to a position that avoids interference with the upper opening edge 52e and the liquid foamable resin material U having a high hardness component is injected into the outer molding region 56A, a part of the injection head 61 is inside the molding region. In order to squeeze out into 56B, a part of the poured liquid foamable resin material U flows into the inner molding region 56B, and a mixed portion with the liquid foamable resin material having a medium hardness component is generated. Not only the boundary between the hard portion and the medium hardness portion becomes unclear, but also the injection head 61
Although the liquid foamable resin material U of a predetermined fixed amount having a high hardness component was poured toward the outer molding region 56A from FIG. In addition, there is a disadvantage that the high hardness outer side support portion 42A cannot be molded as desired.
【０００７】このような不都合を解消するために、例え
ば特開２００１−３８７４７公報に開示されているよう
な成形型を用いた成形方法（以下、先行技術という）が
提案されている。この先行技術で使用されている成形型
は、図８及び図９に示すように、外側成形領域５６Ａと
内側成形領域５６Ｂとを区画する仕切り壁５７のうち注
入ヘッド６１による注入ポイントに対応する仕切り壁部
分５７ａの上半部が上方へ向かうにつれて下型５２の上
部開口縁部５２ｅから遠ざかる側に漸次変位するような
傾斜壁部５７ｂに形成されたものであり、このような下
型５２を用いることによって、外側成形領域５６Ａの開
口幅Ｗ１を注入ヘッド６１の直径Ｄよりも大きく設定し
て外側成形領域５６Ａに高硬度成分の液状発泡性樹脂材
料Ｕを注入する際、その液状発泡性樹脂材料Ｕの一部が
内側成形領域５６Ｂへ流入することを防いで製品（異硬
度部分を持つシートクッションパッド４０）の品質低下
等の原因となる上述したような不都合の発生を回避して
いる。In order to eliminate such inconvenience, a molding method using a molding die as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-38747 (hereinafter referred to as prior art) has been proposed. As shown in FIGS. 8 and 9, the molding die used in this prior art is a partition wall 57 which divides an outer molding region 56A and an inner molding region 56B and corresponds to a partition corresponding to an injection point by an injection head 61. The upper half portion of the wall portion 57a is formed in the inclined wall portion 57b that gradually displaces toward the side away from the upper opening edge portion 52e of the lower mold 52 as it goes upward, and such a lower mold 52 is used. Thus, when the opening width W1 of the outer molding region 56A is set to be larger than the diameter D of the injection head 61 and the liquid foamable resin material U having a high hardness component is injected into the outer molding region 56A, the liquid foamable resin material A part of U is prevented from flowing into the inner molding region 56B and causes the quality deterioration of the product (the seat cushion pad 40 having the different hardness portion) and the like as described above. Thereby avoiding the occurrence.
【０００８】[0008]
【発明が解決しようとする課題】しかし、上記したよう
な先行技術の場合は、高硬度成分の液状発泡性樹脂材料
の一部が内側成形領域５６Ｂへ流入することによる不都
合の発生は回避できるものの、仕切り壁５７の局所に急
激に傾斜した傾斜壁部５７ｂが存在して引っ掛かりやす
いことから、成形後のシートクッションパッドの脱型を
容易にするために、成形型の全内面に離型剤を塗布する
にあたり、その傾斜壁部５７ｂの下面への離型剤の塗布
がやりずらく他の部分に比べて塗布量が不足するといっ
たように、離型剤の塗布が不均一になるだけでなく、シ
ートクッションパッドの脱型時に傾斜壁部５７ｂ及びそ
れに対応するシートクッションパッドの局部に大きな力
が働いて繰り返し成形するとき、傾斜壁部５７ｂが変形
したり、シートクッションパッドの一部が剥落したりす
る不具合がある。また、離型剤の塗布が不均一になるこ
とに起因して脱型の容易性を確保できないとともに、脱
型時に傾斜壁部５７ｂの下面に離型剤が付着残留して型
汚れを生じやすく、さらに、その型汚れをなくするため
に清掃するにしても、狭く入り込んだ箇所であるゆえ
に、清掃もやりづらいといった問題があった。However, in the case of the above-described prior art, it is possible to avoid the inconvenience caused by a part of the liquid foamable resin material having a high hardness component flowing into the inner molding region 56B. Since the inclined wall portion 57b that is steeply inclined locally exists on the partition wall 57 and is easily caught, a mold release agent is provided on the entire inner surface of the molding die in order to facilitate the demolding of the seat cushion pad after molding. In applying the release agent, it is difficult to apply the release agent to the lower surface of the inclined wall portion 57b, and the application amount is insufficient compared to other portions. When the seat cushion pad is released from the mold, a large force acts on the inclined wall portion 57b and the corresponding local portion of the seat cushion pad, and when the seat cushion pad is repeatedly formed, the inclined wall portion 57b may be deformed or the seat cushion pad may be deformed. Part of the Deployment pad there is a problem or to peel off. Further, since the release agent is not uniformly applied, the ease of releasing the mold cannot be secured, and the mold releasing agent is likely to remain on the lower surface of the inclined wall portion 57b during the mold releasing to cause mold contamination. Furthermore, even if the cleaning is performed to eliminate the mold stains, there is a problem that it is difficult to clean because it is a narrowly invaded part.
【０００９】本発明は上記実情に鑑みてなされたもの
で、脱型の容易性を確保し、かつ、下型の局部変形ある
いはシートクッションパッドの一部剥落という不具合の
発生を防止しつつ、高硬度成分の液状発泡性樹脂材料の
一部が内側成形領域へ流入することに伴う品質低下等を
回避することができるシートクッションパッドの成形方
法及びそれに使用する成形型を提供することを目的とし
ている。The present invention has been made in view of the above circumstances, and it is easy to remove the mold from the mold, and at the same time, it is possible to prevent the local deformation of the lower mold or the partial peeling of the seat cushion pad from occurring. An object of the present invention is to provide a molding method for a seat cushion pad and a molding die used for the same, which can avoid quality deterioration and the like due to a part of the liquid foamable resin material of the hardness component flowing into the inner molding region. .
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１に係るシートクッションパッドの
成形方法は、センターサポート部を形成する第１成形領
域及びその幅方向両側に配置されセンターサポート部の
表面よりも前方へ向けて隆起するサイドサポート部を形
成する二つの第２成形領域を有するとともに、両側の第
２成形領域には、サイドサポート部をそれの外端縁側に
臨み略円弧状に湾曲する表面を有する外側サポート部を
形成する外側成形領域とセンターサポート側に隣接する
内側サポート部を形成する内側成形領域とに区画する仕
切り壁が第２成形領域の長手方向に沿ってキャビティ底
面に突設されてなる成形型における下型の第１成形領域
及び第２成形領域のうちの内側成形領域に中硬度成分の
液状発泡性樹脂材料を、かつ、第２成形領域のうちの外
側成形領域に高硬度成分の液状発泡性樹脂材料を各別に
注入し発泡することにより、内外に硬度差のある部分を
持つシートクッションパッドを一体に成形するシートク
ッションパッドの成形方法であって、上記第２成形領域
を外側成形領域と内側成形領域に区画する仕切り壁のう
ち、少なくとも外側成形領域への液状発泡性樹脂材料の
注入ポイトンに対応する仕切り壁部分が、外側サポート
部の湾曲外表面を形成するための外側成形領域の最外周
縁に対応する下型の湾曲部内面もしくはその湾曲部内面
の入口部を通る接線に対して平行または略平行な姿勢に
設定されていることを特徴とするものである。In order to achieve the above object, a method of molding a seat cushion pad according to a first aspect of the present invention is directed to a first molding region forming a center support portion and both sides thereof in the width direction. The center support part has two second molding regions forming a side support part that bulges forward from the surface of the center support part, and the second molding regions on both sides have the side support parts facing the outer edge side thereof and have a substantially circular shape. A partition wall that divides an outer molding region forming an outer support portion having an arcuately curved surface and an inner molding region forming an inner support portion adjacent to the center support side has a cavity along the longitudinal direction of the second molding region. Liquid foamable resin material of medium hardness component in the inner molding region of the first molding region and the second molding region of the lower mold in the molding die protrudingly provided on the bottom surface. In addition, by separately injecting a liquid foamable resin material having a high hardness component into the outer molding region of the second molding region and foaming the same, a seat cushion pad having a difference in hardness inside and outside is integrally molded. A method for molding a seat cushion pad, comprising: a partition wall partitioning the second molding region into an outer molding region and an inner molding region, the partition corresponding to at least an injection poiton of a liquid foamable resin material into the outer molding region. The wall portion is parallel or substantially parallel to a tangent line passing through the inner surface of the lower mold or the inner surface of the lower mold that corresponds to the outermost peripheral edge of the outer molding region for forming the outer curved surface of the outer support. It is characterized by being set in different postures.
【００１１】また、本発明の請求項４に係るシートクッ
ションパッドの成形型は、センターサポート部を形成す
る第１成形領域及びその幅方向両側に配置されセンター
サポート部の表面よりも前方へ向けて隆起するサイドサ
ポート部を形成する二つの第２成形領域を有するととも
に、両側の第２成形領域には、サイドサポート部をそれ
の外端縁側に臨み略円弧状に湾曲する表面を有する外側
サポート部を形成する外側成形領域とセンターサポート
側に隣接する内側サポート部を形成する内側成形領域と
に区画する仕切り壁が第２成形領域の長手方向に沿って
キャビティ底面に突設されてなる下型を備え、この下型
の第１成形領域及び第２成形領域のうちの内側成形領域
に中硬度成分の液状発泡性樹脂材料を、かつ、第２成形
領域のうちの外側成形領域に高硬度成分の液状発泡性樹
脂材料を各別に注入し発泡することにより内外に硬度差
のある部分を持つシートクッションパッドを一体に成形
するシートクッションパッドの成形型であって、上記下
型における第２成形領域を外側成形領域と内側成形領域
に区画する仕切り壁のうち、少なくとも外側成形領域へ
の液状発泡性樹脂材料の注入ポイトンに対応する仕切り
壁部分を、外側サポート部の湾曲外表面を形成するため
の外側成形領域の最外周縁に対応する湾曲部内面もしく
はその湾曲部内面の入口部を通る接線に対して平行また
は略平行な姿勢に設定していることを特徴とするもので
ある。Further, according to a fourth aspect of the present invention, there is provided a mold for seat cushion pads, wherein a first molding region forming a center support portion and both sides in a width direction of the molding region are arranged forward of a surface of the center support portion. There are two second molding regions that form a raised side support portion, and an outer support portion that has a surface that curves in a substantially arc shape facing the outer edge of the side support portion is formed in the second molding regions on both sides. A partition wall partitioning an outer molding region and an inner molding region forming an inner support portion adjacent to the center support side is provided on the bottom surface of the cavity along the longitudinal direction of the second molding region, A liquid foamable resin material having a medium hardness component is used in the inner molding region of the first molding region and the second molding region of the lower mold, and outside of the second molding region. A mold for a seat cushion pad, which integrally molds a seat cushion pad having a difference in hardness inside and outside by injecting and foaming a liquid foamable resin material having a high hardness component into the shape region separately. Among the partition walls that divide the second molding region in the mold into the outer molding region and the inner molding region, at least the partition wall portion corresponding to the injection poiton of the liquid foamable resin material into the outer molding region is not curved outside the outer support portion. Characterized by being set in a posture parallel or substantially parallel to a tangent line passing through an inner surface of the curved portion corresponding to the outermost peripheral edge of the outer molding region for forming the surface or an inlet portion of the inner surface of the curved portion. Is.
【００１２】ここで、上記少なくとも外側成形領域への
液状発泡性樹脂材料の注入ポイトンに対応する仕切り壁
部分は、請求項２及び請求項５に記載のように、下型の
湾曲部内面と同一または略同一の曲率を有する曲線状の
姿勢に屈曲形成される、または、請求項３及び請求項６
に記載のように、型の湾曲部内面の入口部を通る接線に
対して平行または略平行な断面直線状の姿勢の形成され
るのいずれであってもよい。Here, the partition wall portion corresponding to the injection poiton of the liquid foamable resin material into at least the outer molding region is the same as the inner surface of the curved portion of the lower mold as described in claims 2 and 5. Or bent and formed into a curved posture having substantially the same curvature, or claim 3 and claim 6
As described in (3) above, it may be formed in a posture of a straight-line cross section that is parallel or substantially parallel to the tangent line passing through the inlet of the inner surface of the curved portion of the mold.
【００１３】上記のような特徴を有する請求項１及び請
求項４の本発明によれば、成形すべきシートクッション
パッドのサイドサポート部を形成する第２成形領域を高
硬度成分の液状発泡性樹脂材料が注入される外側成形領
域と中硬度成分の液状発泡性樹脂材料が注入される内側
成形領域とに区画するためにキャビティ底面に突設され
た仕切り壁のうち、開口幅の狭い側の外側成形領域への
注入ポイントに対応する仕切り壁部分を、下型の湾曲部
内面もしくはその湾曲部内面の入口部を通る接線に対し
て平行または略平行な姿勢に設定して局部的な入り込み
部を設けることなく、外側成形領域の開口幅を注入ヘッ
ドの直径よりも大きくしているので、高硬度成分の液状
発泡性樹脂材料の一部が内側成形領域に流入することを
防いで高、中硬度成分の樹脂材料が混在することに伴う
品質低下等の不都合の発生を回避することが可能である
のはもとより、注入ポイントに局部的な入り込み部が形
成されないので、成形前に下型の内面全域に脱型を容易
化するための離型剤を塗布するに際して、上記の注入ポ
ンイトに対応する仕切り壁部分にも他の部分と同様に均
一に離型剤を塗布することが可能である。その結果、成
形後のシートクッションパッドの脱型の容易性を確保し
て型汚れを非常に少なくすることができるとともに、局
部的な入り込み部がないために型汚れに対する清掃も非
常に容易に行うことができる。According to the present invention having the above-mentioned features, the second molding region forming the side support portion of the seat cushion pad to be molded has a high hardness component liquid foamable resin material. Of the partition wall protruding on the bottom surface of the cavity for partitioning the outer molding region into which the liquid is injected and the inner molding region into which the liquid foamable resin material of medium hardness component is injected, on the side with the narrower opening width. The partition wall portion corresponding to the injection point to the region is set in a posture parallel or substantially parallel to the tangent line passing through the inner surface of the lower mold bending portion or the inner surface of the bending portion to provide a local entrance. Since the opening width of the outer molding area is made larger than the diameter of the injection head, it prevents a part of the liquid foamable resin material of high hardness component from flowing into the inner molding area, thus providing high and medium hardness. It is possible to avoid the occurrence of inconvenience such as deterioration of quality due to the mixing of resin material for the same amount, and since there is no local intrusion part at the injection point, the entire inner surface of the lower mold is formed before molding. When applying the release agent for facilitating the demolding, it is possible to apply the release agent uniformly to the partition wall portion corresponding to the above-mentioned injection point as in the other portions. As a result, the ease of demolding the seat cushion pad after molding can be ensured, and the mold stain can be greatly reduced, and since there is no local intrusion part, cleaning against the mold stain is also very easy. be able to.
【００１４】また、脱型時にシートクッションパッドと
下型とが引っ掛かることがほとんどないので、仕切り壁
やシートクッションパッドに無理な力をかけないでスム
ーズに脱型することが可能であり、同じ下型を繰り返し
成形に使用しても下型の仕切り壁を局部的に変形すると
か、シートクッションパッドの一部を剥落するとかいっ
た成形品質の低下や成形形状の変化の原因となる不具合
の発生も防止し、常に高品質かつ所定形状のシートクッ
ションパッドを安定よく成形することが可能である。Further, since the seat cushion pad and the lower mold are hardly caught at the time of releasing the mold, it is possible to smoothly remove the mold without applying excessive force to the partition wall or the seat cushion pad. Even if the mold is used for repeated molding, defects such as locally deforming the partition wall of the lower mold or peeling off a part of the seat cushion pad may cause deterioration of molding quality and change of molding shape. It is also possible to always form a seat cushion pad having a high quality and a predetermined shape with stability.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態を図面
にもとづいて説明する。図１は本発明に係るシートクッ
ションパッドの成形方法に使用される成形型における下
型の実施例を示す要部拡大平面図、図２はその縦断面図
である。ここで使用する成形型全体の基本構成は図５に
示すものと同一であり、その成形型を使用して成形され
るシートクッションも図４に例示したものと同一である
ため、それらについての図示はそれぞれ省略し、かつ、
各構成要素及び部位については図５〜図９の説明に使用
したものと同一の符号を用いて、従来技術及び先行技術
と相違する点を中心にして図１及び図２に基づいて説明
する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged plan view of an essential part showing an embodiment of a lower mold in a molding die used in the method for molding a seat cushion pad according to the present invention, and FIG. 2 is a longitudinal sectional view thereof. The basic structure of the entire molding die used here is the same as that shown in FIG. 5, and the seat cushion molded using the molding die is also the same as that illustrated in FIG. Are omitted, and
The same reference numerals as those used in the description of FIGS. 5 to 9 are used for the respective components and parts, and the points different from the conventional technology and the prior art will be mainly described with reference to FIGS. 1 and 2.
【００１６】図１及び図２において、成形型５０におけ
る下型５２には、シートクッションパッド４０における
センターサポート部４１を形成する平坦状の第１成形領
域５５とこの第１成形領域５５に対し下方に略円弧状に
湾曲突出してシートクッションパッド４０における二つ
のサイドサポート部４２を形成する第２成形領域５６が
突片部５４により区画形成されているとともに、下型５
２の第２成形領域５６の略中央部には、これら第２成形
領域５６をシートクッションパッド４０の高硬度外側サ
ポート部４２Ａを形成する外側成形領域５６Ａと中硬度
内側サポート部４２Ｂを形成する内側成形領域５６Ｂと
に区画する仕切り壁５７が第２成形領域５６の長手方向
に沿いほぼ直線状態に延在させてキャビティ５３底面に
突設されている。In FIGS. 1 and 2, the lower die 52 of the forming die 50 has a flat first forming area 55 forming the center support portion 41 of the seat cushion pad 40 and a lower portion of the first forming area 55. A second molding region 56, which is curved and protrudes in a substantially arc shape to form the two side support portions 42 of the seat cushion pad 40, is defined by the projecting piece portion 54, and the lower mold 5 is also formed.
The second molding regions 56 are formed substantially at the center of the second molding regions 56. The outer molding regions 56A form the high-hardness outer support portions 42A of the seat cushion pad 40 and the inner molding regions form the medium-hardness inner support portions 42B. A partition wall 57, which is divided into the molding region 56B, extends in a substantially linear state along the longitudinal direction of the second molding region 56 and is projected from the bottom surface of the cavity 53.
【００１７】上記成形型５０における下型５２におい
て、外側成形領域５６Ａと内側成形領域５６Ｂとを区画
する仕切り壁５７のうち、外側成形領域５６Ａに高硬度
成分の液状発泡性樹脂材料Ｕを注入ヘッド６１を介して
注入する注入ポイントに対応する仕切り壁部分５７ｃの
全体を、図２に明示するように、外側成形領域５６Ａの
最外周縁に対応する下型５２の略円弧状湾曲部５２Ｃの
内面５２ｃと同一または略同一の曲率を有する曲線状に
湾曲形成することにより、該仕切り壁部分５７ｃと湾曲
部内面５２ｃとを平行または略平行な姿勢に設定してい
る。In the lower mold 52 of the molding die 50, the liquid foamable resin material U having a high hardness component is injected into the outer molding region 56A of the partition wall 57 which divides the outer molding region 56A and the inner molding region 56B. As shown in FIG. 2, the entire inner surface of the partition wall portion 57c corresponding to the injection point for injecting via 61 is the inner surface of the substantially arc-shaped curved portion 52C of the lower mold 52 corresponding to the outermost peripheral edge of the outer molding region 56A. The partition wall portion 57c and the curved portion inner surface 52c are set in a parallel or substantially parallel posture by being curved and formed in a curved shape having the same or substantially the same curvature as that of 52c.
【００１８】上記のような構造の下型５２を備えた成形
型５０を用い、その下型５２の第２成形領域５６のうち
の外側成形領域５６Ａに注入装置の注入ヘッド６１を介
して予め高硬度成分に調整配合されたポリウレタン原液
等の液状発泡性樹脂材料を、かつ、第１成形領域５５及
び第２成形領域５６のうちの内側成形領域５６Ｂに注入
装置の注入ヘッド６２を介して予め中硬度成分に調整配
合されたポリウレタン原液等の液状発泡性樹脂材料を、
時間的に相前後して各別に注入し発泡することにより、
図４に示したような異硬度部分４２Ａ，４２Ｂを持つシ
ートクッションパッド４０を一体に成形する。Using the molding die 50 having the lower mold 52 having the above structure, the outer molding region 56A of the second molding region 56 of the lower mold 52 is preliminarily elevated through the injection head 61 of the injection device. A liquid foamable resin material such as a polyurethane stock solution that is adjusted and blended into the hardness component is preliminarily placed in the inner molding region 56B of the first molding region 55 and the second molding region 56 via the injection head 62 of the injection device. Liquid foamable resin materials such as polyurethane undiluted solution adjusted and blended into the hardness component,
By injecting and foaming separately one after another in time,
The seat cushion pad 40 having the different hardness portions 42A and 42B as shown in FIG. 4 is integrally molded.
【００１９】かかる成形時において、外側成形領域５６
Ａの開口幅Ｗ１は、上記仕切り壁部分５７ｃが湾曲部内
面５２ｃと平行または略平行な姿勢に設定されているこ
とから、注入ヘッド６１の直径Ｄよりも大きい。したが
って、外側成形領域５６Ａに高硬度成分の液状発泡性樹
脂材料Ｕを注入する際、その液状発泡性樹脂材料Ｕの一
部が内側成形領域５６Ｂへ流入することを防ぎ、高硬度
成分の液状発泡性樹脂材料Ｕの一部が内側成形領域５６
Ｂに流入して高、中硬度成分の樹脂材料が混在すること
に伴い境界が不鮮明になったり、外側成形領域５６Ａに
おける高硬度成分の液状発泡性樹脂材料Ｕの実質注入量
が不足して外側成形領域５６Ａで成形される外側サポー
ト部４２Ａの形状や品質が低下する等の不都合を回避す
ることが可能である。During such molding, the outer molding region 56
The opening width W1 of A is larger than the diameter D of the injection head 61 because the partition wall portion 57c is set in a posture parallel or substantially parallel to the curved portion inner surface 52c. Therefore, when the liquid foamable resin material U having a high hardness component is injected into the outer molding region 56A, a part of the liquid foamable resin material U is prevented from flowing into the inner molding region 56B, and the liquid foaming material having a high hardness component is foamed. Of the resin material U is part of the inner molding region 56.
The boundary becomes unclear due to the mixture of resin materials of high and medium hardness components flowing into B, or the substantial injection amount of the liquid foamable resin material U of high hardness components in the outer molding region 56A is insufficient and the outside It is possible to avoid inconveniences such as deterioration of the shape and quality of the outer support portion 42A molded in the molding region 56A.
【００２０】また、上記仕切り壁部分５７ｃ全体を湾曲
部内面５２ｃと平行または略平行な姿勢に設定すること
で、注入ポイントに局部的な入り込み部を形成しないの
で、成形前に下型５２の内面全域に脱型を容易化するた
めの離型剤を塗布するに際して、上記注入ポンイトに対
応する仕切り壁部分５７ｃにも他の部分と同様に均一に
離型剤を塗布することが可能となり、その結果、成形後
のシートクッションパッド４０の脱型を容易にして型汚
れを非常に少なくすることができるとともに、局部的な
入り込み部がないために型汚れに対する清掃も非常に容
易に行うことができる。By setting the entire partition wall portion 57c in a posture parallel or substantially parallel to the inner surface 52c of the curved portion, a local entrance portion is not formed at the injection point. When applying a release agent for facilitating demolding over the entire area, it becomes possible to apply the release agent evenly to the partition wall portion 57c corresponding to the injection point like other portions. As a result, it is possible to easily remove the molded seat cushion pad 40 from the mold and reduce the mold stain very much, and it is also possible to clean the mold stain very easily because there is no local entrance. .
【００２１】加えて、脱型時にシートクッションパッド
４０と下型５２とが引っ掛かることがほとんどないの
で、仕切り壁５７やシートクッションパッド４０の局所
に無理な力をかけないでスムーズに脱型することが可能
であり、同じ下型５２を繰り返し成形に使用しても下型
５２の仕切り壁５７が局部的に変形されたり、シートク
ッションパッド４０の一部が剥落したりするといった成
形品質の低下や成形形状の変化の原因となる不具合の発
生も防止し、常に高品質かつ所定形状のシートクッショ
ンパッド４０を安定よく成形することが可能である。In addition, since the seat cushion pad 40 and the lower mold 52 are hardly caught at the time of releasing the mold, the mold can be smoothly released from the partition wall 57 and the seat cushion pad 40 without applying an excessive force locally. Even if the same lower mold 52 is repeatedly used for molding, the partition wall 57 of the lower mold 52 is locally deformed or a part of the seat cushion pad 40 is peeled off. It is possible to prevent the occurrence of a defect that causes a change in the molding shape and always stably mold the seat cushion pad 40 having a high quality and a predetermined shape.
【００２２】図３は本発明に係るシートクッションパッ
ドの成形方法に使用される成形型における下型の他の実
施例を示す要部の拡大縦断面図である。この他の実施例
における下型５２では、外側成形領域５６Ａと内側成形
領域５６Ｂとを区画する仕切り壁５７のうち、外側成形
領域５６Ａに高硬度成分の液状発泡性樹脂材料Ｕを注入
ヘッド６１を介して注入する注入ポイントに対応する仕
切り壁部分５７ｃの全体を、外側成形領域５６Ａの最外
周縁に対応する下型５２の略円弧状湾曲部５２Ｃの内面
５２ｃで、その入口部を通る接線ａに対して平行または
略平行な断面直線状に形成することにより、該仕切り壁
部分５７ｃと湾曲部内面５２ｃの入口部を通る接線ａと
を平行または略平行な姿勢に設定したものである。FIG. 3 is an enlarged vertical cross-sectional view of the essential parts showing another embodiment of the lower mold in the molding die used in the method for molding a seat cushion pad according to the present invention. In the lower mold 52 in the other embodiment, the liquid foamable resin material U having a high hardness component is injected into the outer molding region 56A of the partition wall 57 which divides the outer molding region 56A and the inner molding region 56B by the injection head 61. The entire partition wall portion 57c corresponding to the injection point injected via the inner surface 52c of the substantially arcuate curved portion 52C of the lower mold 52 corresponding to the outermost peripheral edge of the outer molding region 56A is tangential line a passing through the inlet portion. The partition wall portion 57c and the tangent line a passing through the inlet portion of the curved portion inner surface 52c are set to be in a parallel or substantially parallel posture by being formed in a straight line shape that is parallel or substantially parallel to the.
【００２３】この図３に示すような構造の他の実施例の
下型５２を用いる場合も、上記実施例の下型を用いる場
合と同様に、高硬度成分の液状発泡性樹脂材料Ｕの一部
が内側成形領域５６Ｂに流入することに起因して境界が
不鮮明になったり、外側成形領域５６Ａへの高硬度成分
の液状発泡性樹脂材料Ｕの実質注入量不足によって外側
サポート部４２Ａの形状や品質が低下する等の不都合を
回避することができるだけでなく、離型剤の全面均一塗
布を可能として、シートクッションパッド４０の脱型の
容易性、型汚れの減少、型汚れに対する清掃の容易性を
確保するとともに、脱型時のシートクッションパッド４
０と下型５２との引っ掛かりをほとんどなくしてスムー
ズな脱型を可能とし、繰り返し使用にかかわらず、仕切
り壁５７の局部的な変形やシートクッションパッド４０
の一部剥落といった成形品質の低下や成形形状の変化の
原因となる不具合の発生も防止し、高品質かつ所定形状
のシートクッションパッド４０を安定よく成形すること
が可能である。Even when the lower mold 52 of another embodiment having the structure shown in FIG. 3 is used, as in the case of using the lower mold of the above embodiment, one of the liquid foamable resin materials U of high hardness component is used. The boundary becomes unclear due to the portion flowing into the inner molding region 56B, or the shape of the outer support portion 42A due to a substantial lack of the injection amount of the liquid foamable resin material U having a high hardness component into the outer molding region 56A. Not only can inconveniences such as deterioration of quality be avoided, but also the release agent can be applied uniformly over the entire surface, so that the seat cushion pad 40 can be easily removed from the mold, the mold stain can be reduced, and the mold stain can be easily cleaned. And seat cushion pad 4 at the time of demolding
0 and the lower mold 52 are hardly caught, and smooth mold release is possible, and local deformation of the partition wall 57 and seat cushion pad 40 are achieved regardless of repeated use.
It is also possible to prevent the occurrence of defects such as deterioration of the molding quality such as partial peeling of the sheet and changes in the molding shape, and it is possible to stably mold the seat cushion pad 40 having a high quality and a predetermined shape.
【００２４】[0024]
【発明の効果】以上のように、本発明によれば、成形す
べきシートクッションパッドのサイドサポート部を形成
する第２成形領域を高硬度成分の液状発泡性樹脂材料が
注入される外側成形領域と中硬度成分の液状発泡性樹脂
材料が注入される内側成形領域とに区画するために設け
れた仕切り壁のうち、開口幅の狭い側の外側成形領域へ
の注入ポイントに対応する仕切り壁部分を、その下側に
局部的な入り込み部が形成されないように下型の湾曲部
内面もしくはその湾曲部内面の入口部を通る接線に対し
て平行または略平行な姿勢に設定することにより、外側
成形領域の開口幅を注入ノズルの直径よりも大きくして
高硬度成分の液状発泡性樹脂材料の一部が内側成形領域
に流入することによる異硬度部分の境界の不鮮明さ及び
高、中硬度成分の樹脂材料の混在に伴う品質低下等の不
都合の発生を回避することができるだけでなく、成形前
における離型剤の塗布を下型内面の全域に亘り均一化し
てシートクッションパッドの脱型の容易性、型汚れの減
少及び型汚れに対する清掃の容易性を確保することがで
きる。As described above, according to the present invention, the second molding region forming the side support portion of the seat cushion pad to be molded is the outer molding region into which the liquid foamable resin material having the high hardness component is injected. Of the partition wall provided to partition the inner molding region into which the liquid foamable resin material of medium hardness component is injected, the partition wall portion corresponding to the injection point to the outer molding region on the side with the narrow opening width , The outer molding region by setting a posture parallel or substantially parallel to the tangent line passing through the inner surface of the lower curved portion or the inlet of the inner surface of the curved portion so that a local indented portion is not formed on the lower side. The width of the opening is larger than the diameter of the injection nozzle and a part of the liquid foamable resin material of high hardness component flows into the inner molding region. In addition to avoiding inconveniences such as deterioration in quality due to the mixture of oily materials, the release agent can be applied evenly over the entire inner surface of the lower mold before molding, and the seat cushion pad can be easily removed from the mold. It is possible to reduce mold stains and ensure the ease of cleaning against mold stains.
【００２５】しかも、脱型時におけるシートクッション
パッドと下型との引っ掛かりをほとんどなくして、仕切
り壁やシートクッションパッドに無理な力をかけないス
ムーズな脱型を可能とし、繰り返し成形時にも下型の仕
切り壁が局部的に変形したり、シートクッションパッド
の一部が剥落したりする成形品質の低下や成形形状の変
化の原因となる不具合の発生も防止し、常に高品質かつ
所定形状のシートクッションパッドを安定よく成形する
ことができるという効果を奏する。Moreover, the seat cushion pad and the lower mold are hardly caught at the time of releasing the mold, which enables smooth mold releasing without exerting an excessive force on the partition wall or the seat cushion pad, and the lower mold can be repeatedly formed. The partition wall of the seat is locally deformed and part of the seat cushion pad is peeled off. The cushion pad can be molded with good stability.
【図１】本発明に係るシートクッションパッドの成形方
法に使用される成形型における下型の実施例を示す要部
の拡大平面図である。FIG. 1 is an enlarged plan view of a main part showing an embodiment of a lower mold in a mold used in a method for molding a seat cushion pad according to the present invention.
【図２】図１のＸ−Ｘ線に沿う縦断面図である。FIG. 2 is a vertical sectional view taken along line XX of FIG.
【図３】本発明に係るシートクッションパッドの成形方
法に使用される成形型における下型の他の実施例を示す
要部の拡大縦断面図である。FIG. 3 is an enlarged vertical cross-sectional view of essential parts showing another embodiment of the lower mold in the molding die used in the method for molding the seat cushion pad according to the present invention.
【図４】成形されたシートクッションパッドの一例を示
す概略斜視図である。FIG. 4 is a schematic perspective view showing an example of a molded seat cushion pad.
【図５】従来一般のシートクッションパッドの成形型を
示す縦断面図である。FIG. 5 is a vertical cross-sectional view showing a conventional mold for a general seat cushion pad.
【図６】従来一般のシートクッションパッドの成形型に
おける下型の平面図である。FIG. 6 is a plan view of a lower mold of a conventional mold for forming a general seat cushion pad.
【図７】図６のＹ−Ｙ線に沿う拡大縦断面図である。FIG. 7 is an enlarged vertical sectional view taken along the line YY of FIG.
【図８】先行技術における下型の要部の拡大平面図であ
る。FIG. 8 is an enlarged plan view of a main part of a lower mold according to the prior art.
【図９】図８のＺ−Ｚ線に沿う縦断面図である。9 is a vertical cross-sectional view taken along the line ZZ of FIG.
４０ シートクッションパッド ４１ センターサポート部 ４２ サイドサポート部 ４２Ａ 外側サポート部 ４２Ｂ 内側サポート部 ５０ 成形型 ５２ 下型 ５２Ｃ 略円弧状湾曲部 ５２ｃ 湾曲部内面 ５２ｅ 開口縁部 ５３ キャビティ ５５ 第１成形領域 ５６ 第２成形領域 ５６Ａ 外側成形領域 ５６Ｂ 内側成形領域 ５７ 仕切り壁 ５７ｃ 注入ポイントに対応する仕切り壁部分 ６１，６２ 注入ヘッド 40 seat cushion pad 41 Center Support Department 42 Side support section 42A Outer support part 42B Inner support part 50 Mold 52 Lower mold 52C substantially arc-shaped curved portion 52c curved surface 52e Opening edge 53 cavity 55 First molding area 56 Second molding area 56A Outside molding area 56B Inner molding area 57 partition walls 57c Partition wall corresponding to injection point 61,62 injection head
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６８Ｇ 7/02 Ｂ６８Ｇ 7/02 // Ｂ２９Ｋ 105:04 Ｂ２９Ｋ 105:04 Ｂ２９Ｌ 31:58 Ｂ２９Ｌ 31:58 (72)発明者 佐々木 敬之 大阪府大阪市西区江戸堀１丁目17番18号 東洋ゴム工業株式会社内 Ｆターム(参考） 3B084 CA04 4F202 AC06 AG20 AG27 AG28 AH26 CA01 CB01 CK01 CK23 CK90 4F204 AA42 AG20 AG28 AH26 EA01 EA04 EB01 EF27 EK24 EK25─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B68G 7/02 B68G 7/02 // B29K 105: 04 B29K 105: 04 B29L 31:58 B29L 31:58 ( 72) Inventor Noriyuki Sasaki 1-17-18 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Toyo Tire & Rubber Co., Ltd. F-term (reference) 3B084 CA04 4F202 AC06 AG20 AG27 AG28 AH26 CA01 CB01 CK01 CK23 CK90 4F204 AA42 AG20 AG28 AH26 EA01 EA04 EB01 EF27 EK24 EK25
Claims (6)
領域及びその幅方向両側に配置されセンターサポート部
の表面よりも前方へ向けて隆起するサイドサポート部を
形成する二つの第２成形領域を有するとともに、両側の
第２成形領域には、サイドサポート部をそれの外端縁側
に臨み略円弧状に湾曲する表面を有する外側サポート部
を形成する外側成形領域とセンターサポート側に隣接す
る内側サポート部を形成する内側成形領域とに区画する
仕切り壁が第２成形領域の長手方向に沿ってキャビティ
底面に突設されてなる成形型における下型の第１成形領
域及び第２成形領域のうちの内側成形領域に中硬度成分
の液状発泡性樹脂材料を、かつ、第２成形領域のうちの
外側成形領域に高硬度成分の液状発泡性樹脂材料を各別
に注入し発泡することにより、内外に硬度差のある部分
を持つシートクッションパッドを一体に成形するシート
クッションパッドの成形方法であって、 上記第２成形領域を外側成形領域と内側成形領域に区画
する仕切り壁のうち、少なくとも外側成形領域への液状
発泡性樹脂材料の注入ポイトンに対応する仕切り壁部分
が、外側サポート部の湾曲外表面を形成するための外側
成形領域の最外周縁に対応する下型の湾曲部内面もしく
はその湾曲部内面の入口部を通る接線に対して平行また
は略平行な姿勢に設定されていることを特徴とするシー
トクッションパッドの成形方法。1. A first molding region for forming a center support portion and two second molding regions for forming side support portions which are disposed on both sides in the width direction thereof and which are bulged toward the front side of the surface of the center support portion. In the second molding regions on both sides, an outer molding region is formed that has a side support portion facing the outer end edge side thereof and has a curved surface in a substantially arc shape, and an inner support portion that is adjacent to the center support side is formed. The inner molding region of the first molding region and the second molding region of the lower mold in the molding die in which the partition wall which is divided into the inner molding region and the partition wall which projects along the longitudinal direction of the second molding region Liquid foamable resin material of medium hardness component and liquid foamable resin material of high hardness component are separately injected into the outer molding region of the second molding region to foam. A method of forming a seat cushion pad, wherein a seat cushion pad having a portion having a difference in hardness between the inside and the outside is integrally formed by the method of: forming a second forming region into an outer forming region and an inner forming region; , A partition wall portion corresponding to at least the injection poiton of the liquid foamable resin material into the outer molding region, the lower curved portion corresponding to the outermost peripheral edge of the outer molding region for forming the curved outer surface of the outer support portion. A method for molding a seat cushion pad, wherein the seat cushion pad is set in a posture parallel or substantially parallel to a tangent line passing through an inlet portion of an inner surface or an inner surface of a curved portion thereof.
泡性樹脂材料の注入ポイトンに対応する仕切り壁部分
が、下型の湾曲部内面と同一または略同一の曲率を有す
る曲線状の姿勢に屈曲形成されている請求項１に記載の
シートクッションパッドの成形方法。2. A partition wall portion corresponding to an injection poiton of the liquid foamable resin material into at least the outer molding region is bent and formed in a curvilinear posture having the same or substantially the same curvature as the inner surface of the curved portion of the lower mold. The method for forming a seat cushion pad according to claim 1, wherein the seat cushion pad is formed.
泡性樹脂材料の注入ポイトンに対応する仕切り壁部分
が、下型の湾曲部内面の入口部を通る接線に対して平行
または略平行な断面直線状の姿勢に形成されている請求
項１に記載のシートクッションパッドの成形方法。3. A cross-section straight line in which a partition wall portion corresponding to an injection poiton of the liquid foamable resin material into at least the outer molding region is parallel or substantially parallel to a tangent line passing through the inlet portion of the inner surface of the curved portion of the lower mold. The method for forming a seat cushion pad according to claim 1, wherein the seat cushion pad is formed in a substantially posture.
領域及びその幅方向両側に配置されセンターサポート部
の表面よりも前方へ向けて隆起するサイドサポート部を
形成する二つの第２成形領域を有するとともに、両側の
第２成形領域には、サイドサポート部をそれの外端縁側
に臨み略円弧状に湾曲する表面を有する外側サポート部
を形成する外側成形領域とセンターサポート側に隣接す
る内側サポート部を形成する内側成形領域とに区画する
仕切り壁が第２成形領域の長手方向に沿ってキャビティ
底面に突設されてなる下型を備え、この下型の第１成形
領域及び第２成形領域のうちの内側成形領域に中硬度成
分の液状発泡性樹脂材料を、かつ、第２成形領域のうち
の外側成形領域に高硬度成分の液状発泡性樹脂材料を各
別に注入し発泡することにより内外に硬度差のある部分
を持つシートクッションパッドを一体に成形するシート
クッションパッドの成形型であって、 上記下型における第２成形領域を外側成形領域と内側成
形領域に区画する仕切り壁のうち、少なくとも外側成形
領域への液状発泡性樹脂材料の注入ポイトンに対応する
仕切り壁部分を、外側サポート部の湾曲外表面を形成す
るための外側成形領域の最外周縁に対応する湾曲部内面
もしくはその湾曲部内面の入口部を通る接線に対して平
行または略平行な姿勢に設定していることを特徴とする
シートクッションパッドの成形型。4. A first molding region for forming a center support part and two second molding regions for forming side support parts which are arranged on both sides in the width direction of the center support part and which bulge forward from the surface of the center support part. In the second molding regions on both sides, an outer molding region is formed that has a side support portion facing the outer end edge side thereof and has a curved surface in a substantially arc shape, and an inner support portion that is adjacent to the center support side is formed. A lower mold having a partition wall which is divided into an inner molding region and a bottom wall protruding along the longitudinal direction of the second molding region on the bottom surface of the cavity, and the first molding region and the second molding region of the lower mold are provided. Liquid foamable resin material of medium hardness component is injected into the inner molding region and liquid foamable resin material of high hardness component is separately injected into the outer molding region of the second molding region to foam. A mold for a seat cushion pad integrally molding a seat cushion pad having a difference in hardness between the inside and the outside, which is a partition wall for partitioning the second molding region of the lower mold into an outer molding region and an inner molding region. Among them, at least the partition wall portion corresponding to the injection poiton of the liquid foamable resin material to the outer molding region, the curved portion inner surface corresponding to the outermost peripheral edge of the outer molding region for forming the curved outer surface of the outer support portion. Alternatively, a seat cushion pad molding die is set to be in a posture parallel or substantially parallel to a tangent line passing through an inlet portion of the inner surface of the curved portion.
泡性樹脂材料の注入ポイトンに対応する仕切り壁部分
が、下型の湾曲部内面と同一または略同一の曲率を有す
る曲線状の姿勢に屈曲形成されている請求項４に記載の
シートクッションパッドの成形型。5. A partition wall portion corresponding to an injection poiton of the liquid foamable resin material into at least the outer molding region is bent and formed in a curvilinear posture having the same or substantially the same curvature as the inner surface of the curved portion of the lower mold. The mold for the seat cushion pad according to claim 4, which is provided.
泡性樹脂材料の注入ポイトンに対応する仕切り壁部分
が、下型の湾曲部内面の入口部を通る接線に対して平行
または略平行な断面直線状の姿勢に形成されている請求
項４に記載のシートクッションパッドの成形型。6. A cross-section straight line in which a partition wall portion corresponding to an injection poiton of the liquid foamable resin material into at least the outer molding region is parallel or substantially parallel to a tangent line passing through the inlet of the inner surface of the curved portion of the lower mold. The mold for a seat cushion pad according to claim 4, wherein the mold is formed in a uniform posture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001289123A JP2003094452A (en) | 2001-09-21 | 2001-09-21 | Molding method for seat cushion pad, and molding die used for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001289123A JP2003094452A (en) | 2001-09-21 | 2001-09-21 | Molding method for seat cushion pad, and molding die used for the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003094452A true JP2003094452A (en) | 2003-04-03 |
Family
ID=19111664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001289123A Withdrawn JP2003094452A (en) | 2001-09-21 | 2001-09-21 | Molding method for seat cushion pad, and molding die used for the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003094452A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005084493A1 (en) * | 2004-03-05 | 2005-09-15 | Kurabe Industrial Co., Ltd. | Ventilator |
| JP2012061092A (en) * | 2010-09-15 | 2012-03-29 | Toyo Tire & Rubber Co Ltd | Seat cushion pad and method for manufacturing the same |
| KR20150080685A (en) * | 2014-01-02 | 2015-07-10 | 대원산업 주식회사 | Molding apparatus for vehicle seat pad having different hardness |
| JP2016221738A (en) * | 2015-05-28 | 2016-12-28 | 株式会社ブリヂストン | Production device of foaming molded body, production method of foaming molded body, and foaming molded body |
| US10377283B2 (en) | 2017-06-27 | 2019-08-13 | Hyundai Motor Company | Method of manufacturing slim foam pad for vehicle seats and slim foam pad for vehicle seats manufactured using the same |
-
2001
- 2001-09-21 JP JP2001289123A patent/JP2003094452A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005084493A1 (en) * | 2004-03-05 | 2005-09-15 | Kurabe Industrial Co., Ltd. | Ventilator |
| JP2012061092A (en) * | 2010-09-15 | 2012-03-29 | Toyo Tire & Rubber Co Ltd | Seat cushion pad and method for manufacturing the same |
| KR20150080685A (en) * | 2014-01-02 | 2015-07-10 | 대원산업 주식회사 | Molding apparatus for vehicle seat pad having different hardness |
| KR101579425B1 (en) * | 2014-01-02 | 2015-12-22 | 대원산업 주식회사 | Molding apparatus for vehicle seat pad having different hardness |
| JP2016221738A (en) * | 2015-05-28 | 2016-12-28 | 株式会社ブリヂストン | Production device of foaming molded body, production method of foaming molded body, and foaming molded body |
| US10377283B2 (en) | 2017-06-27 | 2019-08-13 | Hyundai Motor Company | Method of manufacturing slim foam pad for vehicle seats and slim foam pad for vehicle seats manufactured using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0866572A (en) | Head rest and its production | |
| JP5037148B2 (en) | Cushion pad manufacturing method | |
| JP2003094452A (en) | Molding method for seat cushion pad, and molding die used for the same | |
| FR2638389A1 (en) | MOLD FOR MANUFACTURING A PLASTIC FOAM ARTICLE COATED WITH AN ENVELOPE AND HAVING AN OPENING | |
| JP5064770B2 (en) | Cushion pad and foam molding die thereof | |
| JP2003117930A (en) | Molding method of seat cushion pad | |
| JP2003094453A (en) | Molding method for seat cushion pad, and molding die to be used for the same | |
| JP2003094451A (en) | Molding method for seat cushion pad | |
| JP5090124B2 (en) | Seat pad, manufacturing method thereof, and manufacturing method of sheet component | |
| JP4235930B2 (en) | Foam mold and sheet pad manufacturing method using the foam mold | |
| JP2006198818A (en) | Mold for molding seat pad and manufacturing method of seat pad | |
| JP4745781B2 (en) | Seat pad, mold and manufacturing method thereof | |
| JP4899739B2 (en) | Foam forming mold and sheet pad manufacturing method | |
| JP2005153293A (en) | Foaming mold and molding method of foamed molded product | |
| JP2006001147A (en) | Manufacturing method of seat pad | |
| JP2007098776A5 (en) | ||
| JP3831224B2 (en) | Seat cushion | |
| JP2000313019A (en) | Method for integral foam molding of pad material of sheet | |
| JP6130820B2 (en) | Seat pad | |
| JP3388253B2 (en) | Integral foam mold for pad material of vehicle seats | |
| JP2006095778A (en) | Foaming mold and method for producing pad for sheet using the mold | |
| JPH0911252A (en) | Production of integrally foamed product in seat for car | |
| JP2010125657A (en) | Foam molding mold and method for molding different hardness pad using the same | |
| JP2024005535A (en) | Seat pad and molding die | |
| WO2022264448A1 (en) | Seat pad and method for manufacturing seat pad |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20081202 |