JPS61283512A - Manufacture of cushion with different hardnesses - Google Patents
Manufacture of cushion with different hardnessesInfo
- Publication number
- JPS61283512A JPS61283512A JP60124946A JP12494685A JPS61283512A JP S61283512 A JPS61283512 A JP S61283512A JP 60124946 A JP60124946 A JP 60124946A JP 12494685 A JP12494685 A JP 12494685A JP S61283512 A JPS61283512 A JP S61283512A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- hardness
- molding
- cushion
- shielding plates
- 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
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
- B29C44/04—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/0461—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は主として自動車用シートクッションなどに用い
られる異硬度クッション体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a cushion body of different hardness, which is mainly used for automobile seat cushions and the like.
（従来の技術）
近時、車両走行中の身体ホールド性を向上させることを
目的と・して、自動車用シートクッシ目ンに用いられる
モールドウレタンフオームなどのクッシ！！７体に関す
る異硬度化が広く行なわれてｂる。−例として、第５図
及び第６図に示す如く、中央全軟質の低硬度部１とし、
その両側に高硬度部２を設けたものがある。(Prior Art) Recently, cushions such as molded urethane foam used in automobile seat cushions have been developed with the aim of improving the body's ability to hold the body while the vehicle is in motion. ! 7. Different hardness is widely practiced. - As an example, as shown in FIGS. 5 and 6, the center is entirely soft and has a low hardness portion 1,
There is one in which high hardness portions 2 are provided on both sides.
このような異硬度シートクッションは、従来、次のよう
な方法で製造されていた。Conventionally, such seat cushions with different hardness have been manufactured by the following method.
すなわち１％開昭５８−２０９３８５号公報に示す如く
、予め成形しておいた２個の高硬度部２を成形型内に対
向させて載置し、その間に形成される空隙部に低硬度原
料を注入して製造する方法である。That is, as shown in 1% Japanese Patent Publication No. 58-209385, two pre-formed high-hardness parts 2 are placed facing each other in a mold, and a low-hardness raw material is placed in the gap formed between them. This is a method of manufacturing by injecting.
あるいは、他の方法として、成形型の内部を堰等によシ
仕切シ、仕切られたキャピテイ内に低硬度原料と高硬度
原料と全同時に注入する方法も広く行なわれている。Alternatively, as another method, a method is widely used in which the inside of the mold is partitioned by a weir or the like, and a low-hardness raw material and a high-hardness raw material are simultaneously injected into the partitioned cavity.
（発明が解決しようとする問題点）
しかしながら、前者の方法においては、予め成形された
高硬度部を所定位置にセットする際に、セットｔスによ
る品質不良が発生しやすく、また、高硬度部と低硬度部
の接着不良が発生しやすいという問題点があり、さらに
、高硬度部を予め成形するための成形設備を別個に必要
とするためコストがアップするという問題点を有してい
る。(Problems to be Solved by the Invention) However, in the former method, when setting the pre-formed high-hardness part in a predetermined position, quality defects are likely to occur due to setting errors, and the high-hardness part There is a problem in that poor adhesion is likely to occur in the low hardness portion, and furthermore, there is a problem in that the cost increases because a separate molding equipment is required to preform the high hardness portion.
一方、後者の方法においても、特性の異なる２つの原料
を同時に型内に注入するため、これらの接合部にセル洩
れ、空洞等の品質不良が発生しやすく、また、注入機を
２台必要とすること及び原料混同防止用の堰を必要とし
型形状が複雑化すること等から、前者同様にコストがア
ップするという問題点を有している。On the other hand, even in the latter method, since two raw materials with different characteristics are injected into the mold at the same time, quality defects such as cell leakage and cavities are likely to occur at the joints between them, and two injection machines are required. Similar to the former method, this method has the problem of increased costs because it requires a weir to prevent mix-up of raw materials and the shape of the mold becomes complicated.
本発明は上記事情に鑑みてなされたものであシ、その目
的とするところは、複雑な機器及び高価な設備等全付加
することなく、簡易な手順により高品質の異硬度クッシ
ョン体？得ることが可能な製造方法を提供しようとする
ことにある。The present invention has been made in view of the above circumstances, and its purpose is to provide a cushion body of different hardness of high quality by a simple procedure without adding any complicated equipment or expensive equipment. The purpose is to provide a manufacturing method that can obtain the desired results.
（問題点を解決するための手段）
本発明は上記目的を達成するための手段として、次のよ
うな構成としである。(Means for Solving the Problems) The present invention has the following configuration as a means for achieving the above object.
すなわち、まず、成形型の成形面の所定部分を遮蔽板で
覆い、この遮蔽板で覆われた個所以外の成形面に一の発
泡体原料（例えば高硬度原料）をスプレーで塗布する。That is, first, a predetermined portion of the molding surface of the mold is covered with a shielding plate, and a foam raw material (for example, a high-hardness raw material) is applied by spray to the molding surface other than the portion covered by the shielding plate.
次いで、スプレーによる塗布が終った後、遮蔽板を成形
型内から取り除くこととする。Next, after the spray coating is completed, the shielding plate is removed from the mold.
しかる後に、上記したーの発泡体原料とは硬度特性の異
なる他の発泡体原料（低硬度原料）を成形型内に注入す
るようにする。After that, another foam raw material (low hardness raw material) having different hardness characteristics from the foam raw material mentioned above is injected into the mold.
（作 用）
スプレーによる塗布は、注入機による注入のように一時
に大量の発泡体原料を成形面に供給しようとするもので
はなく、発泡層全徐々に且つ均一に蓄積させながら形成
させようとするものである。したがって、一の発泡体原
料の発泡。(Function) Spray coating does not attempt to supply a large amount of foam raw material to the molding surface at once, unlike injection using an injection machine, but instead attempts to form the entire foam layer by gradually and uniformly accumulating it. It is something to do. Therefore, foaming of one foam raw material.
硬化反応等は確実且つ円滑に行なわれることとなシ、表
面付近にセル洩れ、空洞等が生じない。The curing reaction, etc. is carried out reliably and smoothly, and no cell leakage or cavities occur near the surface.
そして、成形面の所定部分を遮蔽板で覆うことによシ、
一の発泡体原料を成形面の所望する個所のみに塗布する
ことが可能となる（注入機による注入ではこのような遮
蔽板を用いることはできない）。Then, by covering a predetermined part of the molding surface with a shielding plate,
It becomes possible to apply one foam raw material only to desired locations on the molding surface (such a shielding plate cannot be used when injecting with an injector).
次に、この遮蔽板を取り除き、一の発泡体原料による発
泡層の上に他の発泡体原料を注入すると、この発泡層の
表面には発泡ガスが抜ける際に生じた微細な小孔が散在
しているため、他の発泡体原料の微粒子がこの小孔内に
侵入して硬化する。したがって、一の発泡体原料による
発泡層と他の発泡体原料による発泡層との接合面での接
着は非常に強固なものとなる。Next, when this shielding plate is removed and another foam raw material is injected onto the foam layer made of the first foam raw material, the surface of this foam layer is scattered with minute pores that are created when the foaming gas escapes. As a result, fine particles of other foam raw materials enter the small pores and harden. Therefore, the adhesion between the foam layer made of one foam raw material and the foam layer made of the other foam raw material at the joint surface becomes very strong.
（実施例）
以下、本発明の実施例を第１図乃至第４図に基き説明す
る。(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.
第１図は、本実施例により作られた異硬度クッシＨ７体
としてのシートクッションを示すもので、中央及び両側
の一部が低硬度部１、両側の表面付近が高硬度部２によ
シ形成されている。Fig. 1 shows a seat cushion as a cushion H7 with different hardness made according to this example, in which the center and parts of both sides are made of a low hardness part 1, and the vicinity of the surfaces of both sides are made of a high hardness part 2. It is formed.
このようなシートクッションは次のような工程を経て製
造される。Such a seat cushion is manufactured through the following steps.
第２図（ａｌ〜（ｄｌはこの一連の工程を示すもので、
まず、（ａｌに示す如く、成形型である下型５の平坦な
成形面３ａの所定部分及びその両端部の上にそれぞれ遮
蔽板４．５金載置する。この遮蔽板４．５の端末部４ａ
、５．は、載置された部分から湾曲した成形面３ｂの内
側へ向かって一定寸法突出しておシ、且つ成形面３ｂへ
向かって適度な角度で折曲されている。この適度な角度
は。Figure 2 (al to (dl) shows this series of steps,
First, as shown in (al), shielding plates 4.5 gold are placed on a predetermined portion and both ends of the flat molding surface 3a of the lower die 5, which is a molding die.The ends of the shielding plates 4.5 Part 4a
,5. protrudes a certain dimension from the placed portion toward the inside of the curved molding surface 3b, and is bent at an appropriate angle toward the molding surface 3b. This is a reasonable angle.
作業結果によると、スプレーの吹付は方向に対しこれら
の端末部外面がほぼ直角になるような角度が最も好まし
いものであることが判明している。Work has shown that the spray is most preferably applied at an angle such that the outer surfaces of these ends are approximately perpendicular to the direction.
そして、（ｂｌに示す如く、スプレーガン６によシ高硬
度原料！全成形面３ｂに塗布する。このとき、スプレー
ガン６のスプレ一方向に対して端末部ｔｓＢ、５ａで覆
われている成形面３ｂの部分には、当然のことながら高
硬度原料２が塗布されない。Then, as shown in (bl), the high hardness raw material is applied to the entire molding surface 3b using the spray gun 6. Naturally, the high hardness raw material 2 is not applied to the surface 3b.
尚、高硬度原料２′としては、クリームタイム５〜２０
秒、みかけ密度７０〜１５０ｋｇ・′ぜの半硬質ウレタ
ンフオーム用原料を用いることとする。In addition, as the high hardness raw material 2', Cream Time 5 to 20
A raw material for semi-rigid urethane foam having an apparent density of 70 to 150 kg.
また、発泡・硬化速度についても４０〜６０秒程度の速
度の速いものを用いることが好ましい。Also, it is preferable to use a foaming and curing speed that is as fast as about 40 to 60 seconds.
これは、成形面付着後のタレを防止し、良好な高硬度発
泡層を得るためである。This is to prevent sagging after adhering to the molding surface and to obtain a good high hardness foam layer.
次いで、スプレーガン６による塗布が終了した後、遮蔽
板４．５を下型３円から取り除く。この作業は、高硬度
原料ｌの発泡・硬化速度が上記の如く非常に速いため、
す早く行なわなければならないが、端末部４ａ及び５ａ
に覆われている部分は原料が付着していないのでスムー
スに行うことができ、高硬度発泡層がはがれることもな
い。Next, after the coating by the spray gun 6 is completed, the shielding plate 4.5 is removed from the lower mold 3 circle. This work is necessary because the foaming and curing speed of the high-hardness raw material is extremely fast as mentioned above.
Although it must be done quickly, the terminal parts 4a and 5a
Since the raw material does not adhere to the parts covered by the , the process can be carried out smoothly, and the high hardness foam layer will not peel off.
そして、この後、（ｃｌに示す如く、注入機７によシ低
硬度原料１′ヲ下型３内へ注入する。低硬度原料１′と
してはみかけ密度２０〜６０１ｖ／ｄ程度の軟質ウレタ
ンフオーム用原料を用いる。このとき、作用の項におい
て説明したように、高硬度原料２！をスプレーで塗布し
た効果により、高硬度発泡層の発泡・硬化反応は既に停
止しているため、低硬度原料１′の発泡に悪影響を及ぼ
すことがない。したがって、前述した如く、接合部付近
にセル洩れ、空洞等の成形不良を発生することがなく、
また、微細な７４％孔が散在していることから接合部で
の接着は非常に強固なものとなる。Then, as shown in (cl), the low hardness raw material 1' is injected into the lower mold 3 by the injection machine 7.The low hardness raw material 1' is a soft urethane foam with an apparent density of about 20 to 601 v/d. At this time, as explained in the action section, the foaming and curing reaction of the high hardness foam layer has already stopped due to the effect of spraying the high hardness raw material 2!, so the low hardness raw material There is no adverse effect on the foaming of 1'.Therefore, as mentioned above, molding defects such as cell leakage and cavities do not occur near the joint, and
Furthermore, since fine 74% pores are scattered, the adhesion at the joint is extremely strong.
以上が、特徴部分を有する、本発明の基本的な実施例に
係る工程であるが、製造工程としてはこの後さらにキュ
ア工程がある。すなわち、（ｄｌに示す如く、低硬度原
料Ｖの注入終了後、下型３の上に上型８を載せ、これ全
ヒータ９が配 。The above are the steps related to the basic embodiment of the present invention having characteristic parts, but the manufacturing process further includes a curing step. That is, as shown in (dl), after the injection of the low-hardness raw material V is completed, the upper mold 8 is placed on the lower mold 3, and the heater 9 is placed on the entire upper mold.
設されたキープオーブン１０内へ投入、加熱シ、その後
に脱型を行う。The mold is put into a keep oven 10 provided, heated, and then demolded.
このようにして、第１図に示したような自動軍用シート
クッションを得ることができるが、スプレーガン６によ
る成形面３ｂでの塗布量を多くすれば、第３図に示すよ
うに両側部の大半を高硬度部２で形成することが可能と
なる。また、遮蔽板５の端末部５ａの長さ、角度を変え
れば、第４図のように両側部の側面部のみを高硬化する
ことが可能となる。その他、遮蔽板による遮蔽位置、ス
プレーによる塗布量、スプレー角度等の条件を適宜変化
させることによシ種々の形状のシートクッションヲ裂造
することができる。In this way, it is possible to obtain an automatic military seat cushion as shown in FIG. It becomes possible to form most of the part with the high hardness part 2. Furthermore, by changing the length and angle of the terminal portion 5a of the shielding plate 5, it is possible to highly harden only the side portions of both sides as shown in FIG. In addition, seat cushions of various shapes can be manufactured by appropriately changing conditions such as the shielding position of the shielding plate, the amount of spray applied, and the spray angle.
尚、実施例においては、異硬度クッション体として自動
車用シートクッションを説明しであるが、本発明は自動
車製造分野に限らず種々の分野に適用可能である。その
場合、スプレーによシ塗布される原料は、本実施例の如
くに高硬度原料に限定されるわけではなく、低硬度原料
であってもよいことはもちろんである。In the examples, an automobile seat cushion is described as a cushion body of different hardness, but the present invention is applicable not only to the automobile manufacturing field but also to various fields. In that case, the raw material to be applied by spraying is not limited to a high hardness raw material as in this embodiment, but may of course be a low hardness raw material.
（発明の効果）
以上述べたことから明らかな如く、発泡体原料が注入機
により注入されていた従来方法に対し、本発明による方
法は、遮蔽板を用いながら、スプレーによる塗布の長所
を有効に利用しようとするものである。したがって、本
発明によれば部品な平原によシ高品質の異硬度クッショ
ン体を製造することが可能となる。(Effects of the Invention) As is clear from the above description, in contrast to the conventional method in which the foam raw material was injected using an injection machine, the method according to the present invention effectively utilizes the advantages of spray application while using a shielding plate. It is intended to be used. Therefore, according to the present invention, it is possible to manufacture high-quality cushion bodies of different hardness in plain parts.
第１図は本発明の実施例に係る方法により作られた異硬
度クッション体としての自動車用シートクッションを示
す斜視図、第２図（ａ）〜（ｄ）は本発明の実施例に係
る方法の一連の工程を示す説明図、第３図及び第４図は
本発明の実施例に係る方法によシ作られた第１図以外の
形状の自動車用シートクッションを示す斜視図、第５図
及び第６図は従来技術の問題点を示すための説明図であ
る。
１・・・低硬度部
１′・−・低硬度原料（他の発泡体原料）２・・・高硬
度部
！・・・高硬度原料（一の発泡体原料）３・・・下型（
成形型） ５３．３ｂ・・・成形面４．５・・−遮蔽
板 ６・・・スプレーガン７・・・注入機
（ほか１名）
第３図 第４図
第５図 第６図FIG. 1 is a perspective view showing an automobile seat cushion as a cushion body of different hardness made by the method according to the embodiment of the present invention, and FIGS. 2(a) to 2(d) are the method according to the embodiment of the present invention. FIGS. 3 and 4 are explanatory diagrams showing a series of steps, FIGS. 3 and 4 are perspective views showing an automobile seat cushion having a shape other than that shown in FIG. and FIG. 6 are explanatory diagrams for showing the problems of the prior art. 1...Low hardness part 1'--Low hardness raw material (other foam raw materials) 2...High hardness part! ... High hardness raw material (first foam material) 3 ... Lower mold (
Molding mold) 53.3b...Molding surface 4.5...-Shielding plate 6...Spray gun 7...Injector (and 1 other person) Fig. 3 Fig. 4 Fig. 5 Fig. 6
Claims (2)
以外の成形面に一の発泡体原料をスプレーで塗布し、 次いで、この遮蔽板を成形型内から取り除 き、 しかる後、前記一の発泡体原料とは硬度特 性の異なる他の発泡体原料を成形型内に注入する、 ことを特徴とする異硬度クッション体の製造方法。(1) Cover a predetermined portion of the molding surface of the mold with a shielding plate, spray apply one foam raw material to the other molding surface, then remove this shielding plate from inside the mold, and then proceed as described above. A method for manufacturing a cushion body with different hardness, comprising: injecting into a mold another foam raw material having different hardness characteristics from the first foam raw material.
に対しほぼ直角に折曲されたものである特許請求の範囲
第１項記載の異硬度クッション体の製造方法。(2) The method for manufacturing a cushion body of different hardness according to claim 1, wherein the outer surface of the end portion of the shielding plate is bent at a substantially right angle to the direction of spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60124946A JPS61283512A (en) | 1985-06-08 | 1985-06-08 | Manufacture of cushion with different hardnesses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60124946A JPS61283512A (en) | 1985-06-08 | 1985-06-08 | Manufacture of cushion with different hardnesses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61283512A true JPS61283512A (en) | 1986-12-13 |
| JPH0511013B2 JPH0511013B2 (en) | 1993-02-12 |
Family
ID=14898110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60124946A Granted JPS61283512A (en) | 1985-06-08 | 1985-06-08 | Manufacture of cushion with different hardnesses |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61283512A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132613A (en) * | 1985-12-05 | 1987-06-15 | Inoue Mtp Co Ltd | Molding method for cushion body of various hardness |
-
1985
- 1985-06-08 JP JP60124946A patent/JPS61283512A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132613A (en) * | 1985-12-05 | 1987-06-15 | Inoue Mtp Co Ltd | Molding method for cushion body of various hardness |
| JPH0582803B2 (en) * | 1985-12-05 | 1993-11-22 | Polyurethane Kasei Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0511013B2 (en) | 1993-02-12 |
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