JPS63120610A - Seat cushion and molding method thereof - Google Patents
Seat cushion and molding method thereofInfo
- Publication number
- JPS63120610A JPS63120610A JP61268180A JP26818086A JPS63120610A JP S63120610 A JPS63120610 A JP S63120610A JP 61268180 A JP61268180 A JP 61268180A JP 26818086 A JP26818086 A JP 26818086A JP S63120610 A JPS63120610 A JP S63120610A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- mold
- elastic support
- fibers
- elastic
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract description 25
- 238000000465 moulding Methods 0.000 title description 16
- 239000006260 foam Substances 0.000 claims abstract description 19
- 239000004619 high density foam Substances 0.000 claims abstract description 16
- 239000004620 low density foam Substances 0.000 claims abstract description 16
- 238000005187 foaming Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000010097 foam moulding Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000000806 elastomer Substances 0.000 claims description 12
- 210000004177 elastic tissue Anatomy 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 239000002759 woven fabric Substances 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 239000012209 synthetic fiber Substances 0.000 claims description 5
- 229920002994 synthetic fiber Polymers 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- -1 nets Substances 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims 1
- 238000009751 slip forming Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005192 partition Methods 0.000 description 10
- 239000002657 fibrous material Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011550 stock solution Substances 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 206010013082 Discomfort Diseases 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
- B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
- B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
Landscapes
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、薄肉シートクッションにおいても良好な着
座感の得られるシートクッションとその製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seat cushion that provides a good sitting feeling even in a thin seat cushion, and a method for manufacturing the same.
（従来の技術）
従来のシートクッションで中間層を有する系統のｂのに
は、次のような構成がある。(Prior Art) A conventional seat cushion having an intermediate layer has the following structure.
（ａ）実公昭４８−３２１０８号公報（名称、シート状
クッション）が開示されている。(a) Utility Model Publication No. 48-32108 (name, sheet-like cushion) is disclosed.
この公報の考案は、請求の範囲に記載のとおり、ｒｏ、
０２５ないし０．０３の密度を有する軟質合成樹脂発泡
体からなるシート状のクッション部材１と、このクッシ
ョン部材の片側を残して囲繞した少なくとも０．０４以
上の密度を有する合成樹脂発泡体からなるパッド部材２
と、前記クッション部材とパッド部材との間に剛性を有
し多孔性のかつ充分な可撓性をそなえたシート状の仕切
部材３を介在させて一体に形成したシート状クッション
。」を要旨とするものであるが、考案の詳細な説明によ
ると、仕切部材３は、成る程度の剛性を有する多孔性で
あって充分な可撓性をそなえたシート状材、たとえば、
合成繊維で織成された粗剛な布類ヤ合成樹脂から成形さ
れた網状体である。と説明されている。すなわち、織布
様の剛性体の＠型形状にて支持し、かつその周囲を高密
度のポリウレタンフォームで包囲して、剛性体の自由度
を抑制し、より剛性として横１ヱれをも制限するもので
ある。また、その一体形成の方法並びにその成形体の形
状について、次のように記載されている。The invention of this publication is, as stated in the claims, ro,
A sheet-like cushion member 1 made of a soft synthetic resin foam having a density of 0.25 to 0.03, and a pad made of a synthetic resin foam having a density of at least 0.04 and surrounding the cushion member except for one side. Part 2
and a sheet-like cushion integrally formed with a rigid, porous, and sufficiently flexible sheet-like partition member 3 interposed between the cushion member and the pad member. According to the detailed explanation of the invention, the partition member 3 is made of a porous sheet-like material having a certain degree of rigidity and sufficient flexibility, for example,
It is a coarse and rigid cloth woven from synthetic fibers or a mesh body molded from synthetic resin. It is explained. In other words, a woven fabric-like rigid body is supported in an @-shaped shape, and its periphery is surrounded by high-density polyurethane foam to suppress the degree of freedom of the rigid body, making it even more rigid and limiting lateral sagging. It is something to do. Further, the method of integral formation and the shape of the molded product are described as follows.
「目的の製品の形状をなしている鋳型に、半硬質のパッ
ド部材２を形成する発泡性合成樹脂原液を注入し、発泡
液が発泡しつつある液面上に仕切部材３を載置し、その
上に軟質のクッション部材１を形成する発泡性合成樹脂
原液を注入することにより、これらの３者が一体に接合
された成形物として簡単に得られる。このようにして得
られた本案シート状クッションは、垂直荷重を有効に支
持するだけでなく、自動車のクッションとして使用した
場合に、車体の水平方向への振動にもとずく横揺れに対
してもクッション部材１の周辺をとり囲む比較的高密度
のパッド部材２により、横揺れを軽減する効果的な作用
力を発揮することができる。」
すなわち、剛性で可撓性を有する多孔性シート材料を図
面に示すような椀形に埋設して、同一水平面上における
垂直方向と左右方向の変形を剛性体にて抑制することを
目的としたものでおるが、均等性の良好なりッション性
は得られないものである。``Pour the foamable synthetic resin stock solution that will form the semi-rigid pad member 2 into a mold that has the shape of the desired product, place the partition member 3 on the surface of the foaming liquid, By injecting the foamable synthetic resin stock solution that forms the soft cushion member 1 thereon, a molded product in which these three members are joined together can be easily obtained. The cushion not only effectively supports vertical loads, but also has a relatively large area surrounding the cushion member 1, which when used as a cushion for a car, can also withstand lateral vibrations caused by vibrations of the car body in the horizontal direction. The high-density pad member 2 can exert an effective force to reduce rolling motion.''In other words, a rigid and flexible porous sheet material is buried in a bowl shape as shown in the drawing. Although the purpose of this method is to suppress deformation in the vertical direction and the left and right directions on the same horizontal plane using a rigid body, it is not possible to obtain uniform cushioning properties.
以上のとおり、すなわち、軟質のクッション部材の自然
発泡の途中において、剛性を有する仕切部材を被Ｕ、そ
の側面と底面の全周囲を０．０４以上の密度のパッド部
材にて埋設した形状のシートクッションである。また、
その方法も、発泡しつつおる液面上に仕切部材を乗せて
、その仕切部材を発泡力によって押し上げながら発泡さ
せるものでおる。従って、全く一定の形状が得られるも
のでもなく、モールド成形のような所要の形状体の得ら
れるものでないばかりか、自然発泡の不定の中間形状体
しか１ｑられないもので、その上にパッド部材２を注入
成形するアイディアである。従って、実用的製品の得ら
れるものでない。As described above, in other words, in the middle of natural foaming of a soft cushion member, a rigid partition member is covered with a sheet U, and a pad member with a density of 0.04 or more is embedded all around the sides and bottom of the sheet. It's a cushion. Also,
In this method, a partition member is placed on the surface of the foaming liquid, and the partition member is pushed up by the foaming force to cause foaming. Therefore, it is not possible to obtain a completely constant shape, and it is not possible to obtain a required shape by molding, and only 1 q of naturally foamed, irregularly shaped intermediate bodies can be formed, and a pad member is placed on top of that. The idea is to injection mold 2. Therefore, a practical product cannot be obtained.
（ｂ）実開昭５７−３５１＠公報（名称、シートのクッ
ション構造）が開示されている。(b) Publication No. 57-351@ (name, seat cushion structure) is disclosed.
この公開公報のクッション構造は、請求の範囲に記載の
とおり、
［底板上に所定の形状に成形されたパッド材を載置し、
これを表皮で被覆してなるクッションにおいて、前記パ
ッド材を上下２層として下層パッドを上層パッドより硬
質にするとともに土層パッドと下層パッドの境界面を着
座者の体型に対応づ−る形状に成形し、かつ上層パッド
の前記下層パッドとの境界面に硬化層を形成したことを
特徴とするシートのクッション構造。」を要旨とするも
のであるが、考案の詳細な説明によると、硬化層は、粗
毛フェルト等の剛性繊維材料にウレタン原液の含浸硬化
した強靭な硬化層であり、また、その成形方法としては
、上層パッド２１の発泡型の底面に粗毛フェルト等の剛
性繊維材料を敷き、ウレタン原液を注入して一体発泡せ
しめる方法にて、強靭な硬化層を裏打ちした上層パッド
２１を成形し、この上層パッド２１と、別型にて成形さ
れた下層パッド２２とを重ねて、上層パッド２１と下層
パッド２２とが相互にずれることのないように表皮５で
抱持リング等で抱き締めるようにして底板１上に強固に
取り付けるものである。As stated in the claims, the cushion structure of this publication includes [a padding material formed into a predetermined shape is placed on a bottom plate;
In a cushion made by covering this with skin, the pad material is made of two layers, upper and lower, the lower layer pad is made harder than the upper layer pad, and the interface between the soil layer pad and the lower layer pad is shaped to correspond to the body shape of the seated person. A cushion structure for a seat, characterized in that the upper pad is molded and a hardened layer is formed on the interface between the upper pad and the lower pad. According to the detailed explanation of the invention, the hardened layer is a tough hardened layer made by impregnating and hardening a urethane stock solution into a rigid fiber material such as coarse wool felt, and the molding method is , the upper layer pad 21 lined with a strong hardened layer is molded by laying a rigid fiber material such as coarse wool felt on the bottom of the foam mold of the upper layer pad 21, and injecting a urethane solution and foaming it integrally. 21 and a lower layer pad 22 molded in a separate mold are stacked on top of the bottom plate 1 so that the upper layer pad 21 and the lower layer pad 22 are held together with a holding ring or the like by the outer skin 5 so that the upper layer pad 21 and the lower layer pad 22 do not shift from each other. It is firmly attached to the
以上のとあり、この公報の考案も、（ａ）と同様、剛性
繊維材料にウレタン原液を含浸した強靭な硬化層の中間
層を形成したものである。また、一体構造でなく、別の
型にて成形した上層パッドと下層パッドを重ね合わせた
構造である。As described above, the invention of this publication is also similar to (a), in which an intermediate layer of a tough hardened layer is formed by impregnating a rigid fiber material with a urethane stock solution. Moreover, it is not an integral structure, but has a structure in which an upper layer pad and a lower layer pad that are molded using separate molds are stacked on top of each other.
上記従来技術において、（ａ）の構成では、合成繊維の
織布や合成樹脂の網状体等の剛性を有する仕切部材にて
、クッションを抑制する仕組みのため、非常に伸びの少
ない剛性と、圧縮変形の非常に大ぎな変形性の発泡体と
の複合体であり、あたかも、最小の伸びと最大の伸びと
の物性の較差の組合せのため、クッション応力が掛かっ
た瞬間、２つの物性的違和感が働き不調和な着座感を与
えるものであり、特に、薄肉シートクッションにおいて
甚だしいものである。また、剛性体と発泡体との界面に
おけるクッション作動による破損性が促進される。In the above conventional technology, in the configuration (a), the cushioning is suppressed using a rigid partition member such as a synthetic fiber woven fabric or a synthetic resin net, so it has very little rigidity with little elongation and compression. It is a composite with a highly deformable foam, and due to the combination of the difference in physical properties between the minimum elongation and the maximum elongation, the moment cushion stress is applied, two physical discomforts occur. This gives an incongruous seating feeling, and is especially severe on thin seat cushions. Furthermore, breakage due to the cushioning action at the interface between the rigid body and the foam is promoted.
ざらに、仕切部材の構成が、自然発泡状態にて形成され
た形状であるため、高密度のパッド部材の厚さも一定の
形状が得られず不規則な形状を形成するため、仕切部材
も不規則な状態となり、軟質の上層パッドの厚みも当然
不規則となり、上記の違和感を与える不調和な着座感を
一層増大するものである。In general, since the structure of the partition member is a shape formed in a naturally foamed state, the thickness of the high-density pad member cannot be uniform and forms an irregular shape, so the partition member also has an irregular shape. This results in a regular state, and the thickness of the soft upper layer pad naturally becomes irregular, further increasing the incongruous sitting feeling that gives the above-mentioned discomfort.
また、（ｂ）の従来技術の構成では、上層パッド用の型
の下面に粗毛フェルト等の剛性繊維材料を敷き、ウレタ
ン原液を注入して一体発泡せしめる方法によって、ウレ
タン原液を剛性繊維材料に含浸させて強靭な硬化層を形
成し、この強靭な硬化層を裏打ちした上層パッドと、別
型にて成形した下層パッドとを積み重ねて表皮にて抱き
締めて固定したものであるため、一定の形状が得られる
ものであるが、硬化層の構成は、（ａ）の従来技術と同
様であり、特に、薄肉シートクッションの場合、不調和
な着座感を与えるものであり、その外、同様な欠点を有
するものである。In addition, in the configuration of the prior art shown in (b), a rigid fiber material such as coarse wool felt is laid on the bottom surface of the mold for the upper layer pad, and the rigid fiber material is impregnated with the urethane stock solution by a method of injecting the urethane stock solution and making it integrally foam. The upper layer pad is lined with this strong hardened layer, and the lower layer pad is molded in a separate mold, which are then stacked and held together by the outer skin to form a fixed shape. However, the structure of the hardening layer is the same as that of the prior art (a), which gives an unharmonious seating feeling, especially in the case of a thin seat cushion, and also has the same drawbacks. It is something that you have.
また、上層パッドと下層パッドとは別型にて削切に成形
されたものを積み重ねたものであるため、発泡体の下面
に剛性繊維材料を敷いて一体発泡した上層パッドの下面
の縮み代と、別型にて発泡成形した上層パッドの発泡体
の上面の縮み代とは異なり、下層パッドの上面と上層パ
ッドの下面との積み重ね部の嵌合部の寸法精度が得難い
ばかりでなく、クッション時に、両者間にはすベリ摩擦
現象を生起し、特に発泡体上でのすべりのため耐久性を
大きく低下することになる。In addition, since the upper layer pad and lower layer pad are stacked by cutting and molding with separate molds, the shrinkage allowance on the lower surface of the upper layer pad, which is integrally foamed by laying a rigid fiber material on the lower surface of the foam, Unlike the shrinkage margin of the upper surface of the foam of the upper layer pad, which is foam-molded in a separate mold, it is not only difficult to obtain dimensional accuracy of the fitting part of the stacked part of the upper surface of the lower layer pad and the lower surface of the upper layer pad, but also when cushioning. , a slippery friction phenomenon occurs between the two, and the durability is greatly reduced due to slipping especially on the foam.
囚って、発明者らは、上記（ａ）の先行技術のような一
定の形状の得られない成形方法を排除し、同一金型にて
設計どおりの各種の所要形状の中間層の成形が可能で且
つ所要の位置に全面に、または部分的に精度よく中間層
を入れる成形方法の解決と、薄肉シートクッションにお
いても、調和のとれたクッション性の良好な着座感の得
られる、従来技術の仕切部材および硬化層とは別の構想
による解決を目指すことにしたものである。Therefore, the inventors eliminated the molding method in which a fixed shape cannot be obtained, such as in the prior art (a) above, and created a method in which the intermediate layer can be molded into various desired shapes as designed using the same mold. We have developed a molding method that allows the middle layer to be placed in the desired position on the entire surface or in parts with precision, and we have developed a conventional technology that allows for a good sitting feeling with well-balanced cushioning properties even in thin seat cushions. We decided to aim for a solution based on a concept different from that of the partition member and the hardened layer.
なお、上記の部分的成形方法とは、上下２層間の界面の
部分的位置、特に側壁に連続しない中間の部分的位置に
中間層を、各種の形状に精度よく入れる成形方法であり
、従来その解決が特に望まれていた。ものである。The above-mentioned partial molding method is a molding method in which the intermediate layer is precisely inserted into various shapes at a partial position at the interface between the upper and lower layers, especially at a partial position in the middle that is not continuous with the side wall. A solution was particularly desired. It is something.
（問題点を解決するための手段）
上記従来性なわれている構成のような、最大の柔軟体と
大なる剛性体からなる極端な較差物質の組合せによる構
想では、前記のような多くの問題点が生起されるため、
柔軟体と剛性体との界面における衝撃的なりッション応
力の緩和の必要性を痛感し、特に、薄肉シートクッショ
ンにおいてはその必要性が大きい。(Means for Solving the Problems) In the conventional configuration described above, which is based on a combination of extreme materials consisting of a maximum flexibility body and a large rigidity body, many problems as described above occur. Since the point is generated,
We are keenly aware of the need to alleviate impactive stress at the interface between a flexible body and a rigid body, and this need is especially great for thin seat cushions.
因って、発明者らは、衝撃的クッション応力の緩和支持
に適切な弾性支持体を、軟質低密度フを一層と軟質高密
度フオームからなる積層体の中間層に、設計どおりに、
所望形状のモールド成形によって弾性支持体を一体に形
成した構成によって違和感を解消し、調和のとれたクッ
ション性の良好な着座感をうるようにするものである。Therefore, the inventors provided an elastic support suitable for cushioning impact cushion stress in the middle layer of a laminate consisting of one layer of soft low-density foam and one layer of soft high-density foam, as designed.
The structure in which the elastic support body is integrally formed by molding into a desired shape eliminates the discomfort and provides a good sitting feeling with balanced cushioning properties.
この中間層に使用される弾性支持体としては、天然ゴム
、合成ゴムその他常温にてゴム状弾性を有する高分子物
質である範囲を総称するエラストマーを主体とする繊維
部材やシート部材等を使用するものである。The elastic support used in this intermediate layer is a fiber material or sheet material mainly made of elastomer, which is a general term for a range of polymeric substances that have rubber-like elasticity at room temperature, such as natural rubber, synthetic rubber, etc. It is something.
たとえば、弾性繊維（エラストマー糸又はエラストマー
コード）の織物、編物、網状体、不織布またはそれらの
エクス１−マー被覆シート、貫通穴を設けた有孔■ラス
トマーシート等が適宜に選定使用される。その他、弾性
繊維と、有槻繊Ｉｆｔ（Ｍ生繊維、天然繊維、合成繊維
）または金属繊維との視合繊紺の不織布、織物、編物、
網状体等のシートから適宜に選定、または有機繊維、ま
たは、上記複合繊維材料等のエラスト・マー被覆シート
から適宜に選定使用されるものでおる。For example, woven fabrics, knitted fabrics, net-like bodies, non-woven fabrics of elastic fibers (elastomer threads or elastomer cords), ex-1-mer coated sheets thereof, perforated elastomer sheets with through holes, etc. are appropriately selected and used. In addition, non-woven fabrics, woven fabrics, and knitted fabrics made of synthetic fibers and navy blue fabrics made of elastic fibers and Aritsukisen Ift (M raw fibers, natural fibers, synthetic fibers) or metal fibers;
The material may be appropriately selected from sheets such as net-like bodies, organic fibers, or elastomer-coated sheets such as the above-mentioned composite fiber materials.
上記の有機繊維とは弾性繊維以外の非弾性の有機繊維を
指称するものである。非弾性の有機１１ｉ１ｆの場合は
、エラストマー被覆によって弾性を付与するため、密度
の粗い組織が好適であり、たとえば、ゴム被覆すだれ織
りの２プライの交差成形シート等が使用される。弾性支
持体のエラストマー被覆シートは、加熱成形によって得
られるものである。また、用途に応じてプライ数やシー
トの厚みが適宜に調整される。また、中間層の一体形成
の方法としては、所望の位置に、所望の形状が高精度で
得られるモールド成形ににつて解決するものである。The above-mentioned organic fibers refer to inelastic organic fibers other than elastic fibers. In the case of inelastic organic 11i1f, since elasticity is imparted by coating with an elastomer, a coarse-density structure is suitable, and for example, a two-ply cross-molded sheet of rubber-coated blind weave is used. The elastomer-coated sheet of elastic support is obtained by thermoforming. Further, the number of plies and the thickness of the sheet are adjusted as appropriate depending on the application. Furthermore, as a method for integrally forming the intermediate layer, a method of molding that can obtain a desired shape at a desired position with high precision is used.
すなわち、下型の周辺に、開閉可能に連結された複数の
上型を有する成形型において、所要の形状に設計さ゛れ
だ上層用上型の内面に、弾性支持体の端部をフランジ部
に鴇脱可能に固定して沿接し、下型に軟質低密度フオー
ムの発泡性配合液を注入、上層用上型を閉じ加熱発泡成
形を行ない、その発泡体のタックフリータイムの終了直
前または直後に上層用上型を開ぎ、一体成形された弾性
支持体上に軟質高密度フオームの発泡性配合液を注入し
、下層用上型を閉じ加熱発泡成形を行ない、軟質低密度
フオーム、弾性支持体、軟質高密度フオームの３者を連
続的に一体に成形するものである。That is, in a mold having a plurality of upper molds connected to each other so as to be openable and closable around the lower mold, the end of the elastic support is fastened to the flange on the inner surface of the upper mold for the upper layer, which is designed to have a desired shape. The foaming liquid is injected into the lower mold, the upper mold for the upper layer is closed, and the foam is heated and foamed. Open the upper mold for the lower layer, inject the foamable mixture of the soft high-density foam onto the integrally molded elastic support, close the upper mold for the lower layer, and perform heat foam molding to form the soft low-density foam, the elastic support, Three soft, high-density foams are continuously molded into one piece.
なお、上記の工程は、弾性支持体を、軟質低密度フＡ−
ムと軟質高密度フオームとの界面全体に挿入するもので
あるが、界面の部分的必要位置にのみ弾性支持体を挿入
する場合もある。この部分的挿入の場合は、上層用」下
型の内面の所望の部分的位置に、必らかしめ所要個数の
針状突起（ピン）をｒ＝２’＝ブ、これに弾性支持体を
差し込み、着脱可能に固定して型に沿接するか、おるい
は、容易に着脱出来る粘着剤を用いて一時的に固定沿接
する等の手段がとられる。In addition, in the above process, the elastic support is made of soft low-density fiber A-
Although the elastic support is inserted into the entire interface between the foam and the soft high-density foam, there are cases where the elastic support is inserted only at the necessary partial positions of the interface. In the case of this partial insertion, the required number of needle-like protrusions (pins) are caulked at the desired partial positions on the inner surface of the lower mold for the upper layer, and the elastic support is inserted into these. Alternatively, it may be removably fixed and attached to the mold, or it may be temporarily fixed and attached using an adhesive that can be easily attached and detached.
この発明のシートクッションは、軟質低密度フ４−ムと
軟質高密度フオームとの中間層に弾性的支持性を有する
弾性支持体が、同一金型にて、各層用の上型の加圧の下
に加熱状態にて連続的に所要の形状に形成されるため、
各層の分子間の良好な融合が行なわれ且つ位置並びに形
状において設計どおりの高精度のフオームの強力な一体
構造が得られる。In the seat cushion of the present invention, an elastic support having elastic support properties is provided as an intermediate layer between a soft low-density foam and a soft high-density foam. Because it is continuously formed into the desired shape under heating,
There is good fusion between the molecules of each layer and a strong unitary structure with a precisely designed form in position and shape is obtained.
また、フオームと弾性支持体の界面における衝撃的なり
ッション応力の緩和がｊｑられ、良好なりッション性と
界面部における破損性が抑制される。In addition, the shock stress at the interface between the foam and the elastic support is alleviated, and good cushioning properties and breakage at the interface are suppressed.
ざらに、厚肉のシートクッションはもら論のこと、特に
、薄肉のシートクッションにおいて、中間層に弾性支持
体の介在によって、底着き感や違和感のない調和のとれ
たクッション性の良好な着座感が１ｑられる。Generally speaking, thick seat cushions are a matter of course, but especially in thin seat cushions, the presence of an elastic support in the middle layer provides a good sitting feeling with harmonious cushioning without the feeling of bottoming out or discomfort. is reduced to 1q.
第１図は、この発明の中間部に弾性支持体を有するシー
トクッションの一例を示す中央縦断の端面図、
第２図は、同じく第１図と同様のシートクッション成形
品の１／２を示す中央縦断斜視図、第３図−（ａ）は、
第２図成形品の］］）ａ −ＩＩａ線断面図、
第３図−（ｂ）は、同じ＜ｍｂ−ｍｂ線断面図、第３図
−（Ｃ）は、同じ＜ｉｎｃ−ｍｃ線断面図でおる。FIG. 1 is an end view of a central longitudinal section showing an example of a seat cushion having an elastic support in the middle portion of the present invention. FIG. 2 is a half view of a molded seat cushion similar to FIG. 1. Central vertical perspective view, FIG. 3-(a),
Figure 2]])a-IIa line sectional view of the molded product; Figure 3-(b) is the same <mb-mb line sectional view; Figure 3-(C) is the same <inc-mc line sectional view. Illustrated.
図において、１は軟質低密度フオーム、本実施例では一
例として０．０４５〜０．０５５の密度を有する軟質ポ
リウレタンフォームを使用、２は軟質高密度フオームで
、本例では一例として０．０５〜０．０６５の密度を有
する軟質ポリウレタン７７ｔ −ムを使用したもので、
低密度と高密度とは両者間に密度差を設定することであ
って、用途と使用条件に応じて色々な較差密度の組合せ
が形成されるものである。３は低密度と高密度フオーム
からなる積層体の中間層に一体に形成される弾性支持体
であり、この実施例ではポリウレタン系弾性繊維を使用
、この系の弾性繊維の物性は、一般に、引張り強度０．
５〜１．０ ！；Ｉ／ｄ 、伸度４５０〜８００％、比
重１．０〜１．３程度である。ＳＦは座面、ＳＳは座面
の両側の側部で、***状に形成され、軟質低密度フオー
ム１と軟質高密度フオーム２および弾性支持体３も、第
３図の断面図に示すように、座面の両側部に沿って***
状に形成される。In the figure, 1 is a soft low-density foam, in this example, a flexible polyurethane foam having a density of 0.045 to 0.055 is used, and 2 is a soft high-density foam, in this example, a soft polyurethane foam having a density of 0.05 to 0.05 is used as an example. Made of soft polyurethane 77t-me with a density of 0.065,
Low density and high density are defined by setting a density difference between them, and various combinations of density differences are formed depending on the purpose and conditions of use. 3 is an elastic support body integrally formed in the middle layer of a laminate consisting of low density and high density foams. In this example, polyurethane elastic fibers are used, and the physical properties of this type of elastic fibers are generally tensile strength. Strength 0.
5~1.0! ; I/d, elongation of 450 to 800%, and specific gravity of about 1.0 to 1.3. SF is the seat surface, and SS is the side portions on both sides of the seat surface, which are formed in a raised shape, and the soft low-density foam 1, the soft high-density foam 2, and the elastic support 3 are also formed as shown in the cross-sectional view of FIG. , formed in a raised shape along both sides of the seat surface.
上記引例形状は一例を示したもので、形状は、用途並び
に使用条件に応じて適宜に各種の形状が使用される。The shapes cited above are merely examples, and various shapes may be used as appropriate depending on the purpose and conditions of use.
次に、上記のシートクッションの一体成形方法の手順を
説明する。Next, the procedure of the method for integrally molding the seat cushion described above will be explained.
第４図は、このシートクッションの一例の成形方法に使
用される成形型の中央断面を示す概要断面図で、第２図
のシートクッション成形品に対応る成形型である。FIG. 4 is a schematic sectional view showing a central cross section of a mold used in the method for molding this example of the seat cushion, and is a mold corresponding to the seat cushion molded product of FIG. 2.
図において、４は下型、５は軟質低密度フオーム１と弾
性支持体３と一体構成するための上層用上型で、５Ｆは
この下層用上型のフランジ部である。６は軟質高密度フ
オームを成形する下層用上型であり、７．８はヒンジ継
手で、雨上型５．６を交互に下型４に急速に嵌合および
開放するための継手である。なお、上型の開閉は油圧機
構にて自動的に行なわれる。加熱は歯色な方法が使用さ
れうるが、本例は、アルミ型を使用、鋳造時に熱媒体用
パイプを鋳込むパイプ方式を採用し、５０℃〜１００℃
の温度範囲において、使用材料の配合組成に応じて適当
な温度を選定し、熱媒体によってモールド温度を均一に
且つ精度よく副面するようにしたものである。In the figure, 4 is a lower mold, 5 is an upper mold for an upper layer for integrally forming the soft low-density foam 1 and the elastic support 3, and 5F is a flange portion of this upper mold for a lower layer. 6 is an upper mold for the lower layer for molding a soft high-density foam, and 7.8 is a hinge joint for rapidly engaging and releasing the rain upper mold 5.6 with the lower mold 4 alternately. Note that the upper mold is automatically opened and closed by a hydraulic mechanism. Although various methods can be used for heating, in this example, an aluminum mold is used, and a pipe method is adopted in which a heat medium pipe is cast during casting, and the heating temperature is 50°C to 100°C.
In this temperature range, an appropriate temperature is selected according to the composition of the materials used, and the mold temperature is controlled uniformly and precisely by the heating medium.
次に、成形手順を述べる。Next, the molding procedure will be described.
まず、成形型を６５℃に保持するように調整する。第４
図に示すように、弾性支持体３は、その端縁部をフラン
ジ部５Ｆに着脱可能に取付けて、上層用上型５の内面に
沿接するように取付け、注入ヘッド９から下型４に、軟
質低密度フオームを形成する発泡性配合液を注入し、第
５図に示すように、上層用上型５を閉じ、加熱発泡成形
を行ない、その発泡体のタックフリータイムの終了直前
または直後に、第６図に示すように上層用上型５を開き
、一体成形された弾性支持体３の」ニに、軟質高密度フ
Ａ−ムの発泡性配合液を、注入ヘッド１０から注入し、
第７図に示すように、下層用上型６を閉じ加熱発泡成形
を行ない、発泡完了後約２分間硬化を行ない下層用上型
６を開き、下型４より取り出すと、第２図、第３図に示
すような軟質低密度フオームと軟質高密度フオームとの
中間層に弾性支持体を一体に形成したシートクッション
製品が得られる。First, the mold is adjusted to be maintained at 65°C. Fourth
As shown in the figure, the elastic support 3 has its edge portion removably attached to the flange portion 5F, is attached so as to be along the inner surface of the upper mold 5 for upper layer, and is inserted from the injection head 9 into the lower mold 4. A foaming compound that forms a soft low-density foam is injected, the upper mold 5 for the upper layer is closed, and heat foaming is performed, as shown in FIG. , as shown in FIG. 6, open the upper mold 5 for the upper layer, and inject the foamable compounded liquid of the soft high-density film A into the integrally molded elastic support 3 from the injection head 10.
As shown in FIG. 7, the upper mold 6 for the lower layer is closed and heat foaming is performed, and after the foaming is completed, curing is performed for about 2 minutes, the upper mold 6 for the lower layer is opened, and when it is taken out from the lower mold 4, A seat cushion product as shown in FIG. 3 is obtained in which an elastic support is integrally formed in an intermediate layer between a soft low-density foam and a soft high-density foam.
〔発明の効果〕
この発明の成形方法によって得られる軟質低密度フオー
ムの片面にモールドにて一体発泡成形された所要形状の
弾性支持体の中間層と、軟質高密度フオームとを同一モ
ールドにて所要形状に一体に積層したシートクッション
は、前記作用項に言及したような機能を有するため、特
に、自動車のような制限されたスペースに適切な薄肉の
しかも良好なりッション着座感の得られるシートクッシ
ョンを提供することが出来るばかりでなく、その他すべ
てのシートクッションにおけるすぐれたクッション効果
が得られる。[Effects of the Invention] An intermediate layer of an elastic support having a desired shape, which is integrally foam-molded on one side of the soft low-density foam obtained by the molding method of the present invention, and the soft high-density foam can be formed in the same mold. Seat cushions that are laminated integrally into a shape have the functions mentioned in the above-mentioned function, so it is especially important to create seat cushions that are thin and provide a good cushioning and seating feeling, which is suitable for limited spaces such as automobiles. Not only can this be provided, but also an excellent cushioning effect can be obtained in all other seat cushions.
また、発泡体と弾性支持体との強力な一体構造のため、
従来のような発泡体と剛性体との大きな物性の較差に基
因する界面における局部的破壊が抑制されすぐれた耐久
性効果が得られる。In addition, due to the strong integrated structure of foam and elastic support,
Local breakage at the interface, which is caused by the large difference in physical properties between the foam and the rigid body as in the prior art, is suppressed, and excellent durability can be achieved.
さらに、この発明の成形方法は、上層部と下層部の界面
に湾曲部分や凹凸部分のある場合にも、その界面の設計
位置に、あるいは、側壁に連続しない中間の部分的位置
に、弾性支持体を精度よくしかも一体向な強力な中間層
が提供される。Furthermore, even when the interface between the upper layer and the lower layer has a curved portion or uneven portion, the forming method of the present invention provides elastic support at the designed position of the interface or at a partial intermediate position that is not continuous with the side wall. A strong intermediate layer is provided that allows the body to be precisely aligned and integrated.
第１図は、この発明のシートクッションの一例を示す中
央縦断の端面図、
第２図は、同じく中央縦断斜視図、
第３図−（ａ）は、第２図のｌａ−■ａ線断面図、
第３図−（ｂ）は、同じ＜ｍｂ−ｍｂ線断面図、第３図
−（Ｃ）は、同じ＜ＩＩＩｃ−Ｉ［１ｃ線断面図、第４
図、第５図、第６図、第７図は、この発明のシートクッ
ションの一例に使用される成形型の断面と成形手順を示
した概要断面図である。
１・・・軟質低密度フオーム
２・・・軟質高密度）ｔ−ム
３・・・弾性支持体 ４・・・下型５・・・上層用
上型 ６・・・下層用上型５Ｆ・・・上層用上型の
フランジ部
９．１０・・・注入ヘッドFig. 1 is an end view of a central longitudinal section showing an example of the seat cushion of the present invention, Fig. 2 is a perspective view of the central longitudinal section, and Fig. 3-(a) is a cross-sectional view taken along the line la-■a of Fig. 2. Figure 3-(b) is the same <mb-mb line cross-sectional view, Figure 3-(C) is the same <IIIc-I [1c line cross-sectional view,
5, 6, and 7 are schematic sectional views showing a cross section of a mold used for an example of the seat cushion of the present invention and a molding procedure. 1... Soft low density foam 2... Soft high density foam 3... Elastic support 4... Lower mold 5... Upper mold for upper layer 6... Upper mold for lower layer 5F. ... Flange part of upper mold for upper layer 9.10 ... Injection head
Claims (6)
泡成形された所要形状の弾性支持体の中間層と、軟質高
密度フォームとを同一モールドにて所要形状に一体に積
層したシートクッション。(1) A seat cushion in which an intermediate layer of an elastic support having a desired shape is integrally formed on one side of a soft low-density foam using a mold, and a soft high-density foam is integrally laminated in the desired shape using the same mold.
の厚さを２０〜８０ｍｍの薄肉シートに形成した特許請
求の範囲第１項記載のシートクッション。(2) The seat cushion according to claim 1, wherein the seat cushion is formed into a thin sheet having an overall thickness of 20 to 80 mm with an elastic support interposed therebetween.
ストマーコード）の織物、編物、網状体、不織布又はそ
れらのエラストマー被覆シート、有孔エラストマーシー
ト等の弾性体から選定される支持体である特許請求の範
囲第１項記載のシートクッション。(3) A patent claim in which the elastic support is a support selected from elastic materials such as woven fabrics, knitted fabrics, nets, nonwoven fabrics of elastic fibers (elastomer threads or elastomer cords), elastomer-coated sheets thereof, perforated elastomer sheets, etc. The seat cushion described in item 1 of the range.
再生繊維、天然繊維、合成繊維）または金属繊維との複
合繊維の不織布、織物、編物、網状体等のシートから選
定される支持体である特許請求の範囲第１項記載のシー
トクッション。(4) The elastic support consists of elastic fibers and inelastic organic fibers (
2. The seat cushion according to claim 1, wherein the seat cushion is a support selected from sheets such as nonwoven fabrics, woven fabrics, knitted fabrics, and net-like bodies made of composite fibers (regenerated fibers, natural fibers, synthetic fibers) or metal fibers.
維と、非弾性の有機繊維あるいは金属繊維との複合繊維
の不織布、織物、編物、網状体等のエラストマー被覆シ
ートから選定される支持体である特許請求の範囲第１項
記載のシートクッション。(5) The elastic support is selected from elastomer-coated sheets such as non-woven fabrics, woven fabrics, knitted fabrics, net-like bodies made of non-elastic organic fibers, or composite fibers of elastic fibers and non-elastic organic fibers or metal fibers. The seat cushion according to claim 1, which is a body.
を有する成形型において、上層用上型の内面に弾性支持
体を着脱可能に取付け、下型に軟質低密度フォーム用の
発泡性配合液を注入、上層用上型を閉じ加熱発泡成形を
行ない、その発泡体のタックフリータイムの終了直前ま
たは直後に上層用上型を開き、一体成形された弾性支持
体上に軟質高密度フォームの発泡性配合液を注入し、下
層用上型を閉じ加熱発泡成形を行ない、軟質低密度フォ
ーム、弾性支持体、軟質高密度フォームを連続的に一体
に成形することを特徴とするシートクッションの成形方
法。(6) In a mold having a plurality of upper molds connected to each other so as to be openable and closable around the lower mold, an elastic support is removably attached to the inner surface of the upper mold for the upper layer, and a flexible support for soft low-density foam is attached to the lower mold. The foaming mixture is injected, the upper mold for the upper layer is closed, and heat foaming is performed. Just before or after the end of the tack-free time of the foam, the upper mold for the upper layer is opened, and a soft high-temperature foam is placed on the integrally molded elastic support. A sheet characterized in that a flexible low density foam, an elastic support, and a flexible high density foam are continuously integrally molded by injecting a foaming compounded liquid of density foam, closing the upper mold for the lower layer, and performing heating foam molding. How to mold cushions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61268180A JPH0722932B2 (en) | 1986-11-11 | 1986-11-11 | Seat cushion and method of molding the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61268180A JPH0722932B2 (en) | 1986-11-11 | 1986-11-11 | Seat cushion and method of molding the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63120610A true JPS63120610A (en) | 1988-05-25 |
| JPH0722932B2 JPH0722932B2 (en) | 1995-03-15 |
Family
ID=17455029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61268180A Expired - Fee Related JPH0722932B2 (en) | 1986-11-11 | 1986-11-11 | Seat cushion and method of molding the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722932B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004034853A1 (en) * | 2002-10-18 | 2004-04-29 | Toyo Tire & Rubber Co., Ltd. | Cushion pad for seat, and method of manufacturing the cushion pad |
| JP2013006279A (en) * | 2011-06-22 | 2013-01-10 | Toyo Tire & Rubber Co Ltd | Method for manufacturing thermosetting resin composite and forming die for production |
| WO2015163188A1 (en) * | 2014-04-22 | 2015-10-29 | 長瀬産業株式会社 | Cushion structure, cushion structure component and cushion structure manufacturing method |
| JP2019084780A (en) * | 2017-11-09 | 2019-06-06 | トヨタ紡織株式会社 | Seat pad mold |
| JP2021049683A (en) * | 2019-09-24 | 2021-04-01 | トヨタ紡織株式会社 | Method for manufacturing interior material for vehicle and interior material for vehicle |
| CN112936705A (en) * | 2021-01-25 | 2021-06-11 | 襄阳市俭鼎玻璃钢有限责任公司 | Preparation method of high-performance environment-friendly aviation seat cushion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832108U (en) * | 1971-08-19 | 1973-04-18 | ||
| JPS5914342A (en) * | 1982-07-13 | 1984-01-25 | Sanyo Electric Co Ltd | Manufacture of rotor core |
-
1986
- 1986-11-11 JP JP61268180A patent/JPH0722932B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832108U (en) * | 1971-08-19 | 1973-04-18 | ||
| JPS5914342A (en) * | 1982-07-13 | 1984-01-25 | Sanyo Electric Co Ltd | Manufacture of rotor core |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004034853A1 (en) * | 2002-10-18 | 2004-04-29 | Toyo Tire & Rubber Co., Ltd. | Cushion pad for seat, and method of manufacturing the cushion pad |
| JP2013006279A (en) * | 2011-06-22 | 2013-01-10 | Toyo Tire & Rubber Co Ltd | Method for manufacturing thermosetting resin composite and forming die for production |
| WO2015163188A1 (en) * | 2014-04-22 | 2015-10-29 | 長瀬産業株式会社 | Cushion structure, cushion structure component and cushion structure manufacturing method |
| JP2015205611A (en) * | 2014-04-22 | 2015-11-19 | 長瀬産業株式会社 | Cushion structure, cushion structure component and manufacturing method of cushion structure |
| CN106231959A (en) * | 2014-04-22 | 2016-12-14 | 长濑产业株式会社 | Pad structure, pad structural member and the manufacture method of pad structure |
| US10632881B2 (en) | 2014-04-22 | 2020-04-28 | Nagase & Co., Ltd. | Cushion structure, cushion structure component and cushion structure manufacturing method |
| CN106231959B (en) * | 2014-04-22 | 2020-10-23 | 长濑产业株式会社 | Pad structure, pad structure member, and method for manufacturing pad structure |
| JP2019084780A (en) * | 2017-11-09 | 2019-06-06 | トヨタ紡織株式会社 | Seat pad mold |
| JP2021049683A (en) * | 2019-09-24 | 2021-04-01 | トヨタ紡織株式会社 | Method for manufacturing interior material for vehicle and interior material for vehicle |
| CN112936705A (en) * | 2021-01-25 | 2021-06-11 | 襄阳市俭鼎玻璃钢有限责任公司 | Preparation method of high-performance environment-friendly aviation seat cushion |
| CN112936705B (en) * | 2021-01-25 | 2022-06-21 | 襄阳市俭鼎玻璃钢有限责任公司 | Preparation method of high-performance environment-friendly type aviation seat cushion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0722932B2 (en) | 1995-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |