JPH0489213A - Manufacture of rubber bellows - Google Patents
Manufacture of rubber bellowsInfo
- Publication number
- JPH0489213A JPH0489213A JP20461990A JP20461990A JPH0489213A JP H0489213 A JPH0489213 A JP H0489213A JP 20461990 A JP20461990 A JP 20461990A JP 20461990 A JP20461990 A JP 20461990A JP H0489213 A JPH0489213 A JP H0489213A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- bellows
- mold
- sheet
- cloth
- 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
Landscapes
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、ゴム蛇腹の成形法に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of molding a rubber bellows.
（従来の技術）
従来、表面に一定の間隔を置いて山形状の突条を形成し
た型に、未加硫ゴム生地圧接固定し、さらにその表面に
布帛、網等の補強材を接着させて未加硫ゴム生地を加硫
することによって、ゴム蛇腹を成形する方法が知られて
いる。(Prior art) Conventionally, an unvulcanized rubber fabric is pressed and fixed to a mold with mountain-shaped ridges formed at regular intervals on the surface, and reinforcing materials such as cloth or netting are then bonded to the surface. A method of forming a rubber bellows by vulcanizing unvulcanized rubber dough is known.
しかしながら、成形工程が煩雑でコスト高となり、しか
も加硫後ゴム生地が収縮するためゴム生地に接着された
補強材との間に収縮差が生じ、蛇腹が変形したりその表
面に皺が発生したりして外観上好ましいものでなかった
。However, the molding process is complicated and costly, and since the rubber fabric shrinks after vulcanization, a shrinkage difference occurs between the rubber fabric and the reinforcing material bonded to it, causing deformation of the bellows and wrinkles on its surface. Therefore, the appearance was not desirable.
（発明の解決しようとする問題点）
この発明はこれ等の欠点を除去し、成形が簡単で低コス
トで外観が良好なゴム蛇腹を提供しようとするものであ
る。(Problems to be Solved by the Invention) The present invention aims to eliminate these drawbacks and provide a rubber bellows that is easy to mold, is inexpensive, and has a good appearance.
（問題点を解決するための手段）
以下この発明を長靴の胛前屈曲部に使用するゴム蛇腹の
成形に具体化した本発明の実施状態を示す図面によって
説明すれば、この発明は、未加硫ゴム生地１２を伸張し
た状態の伸縮性の布帛１１に貼り合わせて形成されたシ
ート１を、表面に一定間隔を置いて山形状の突条２１．
２１・・・を形成した型２に圧接固定して、未加硫ゴム
生地１２を加硫することを特徴とするゴム蛇腹の成形法
を発明の要旨とするものである。(Means for Solving the Problems) This invention will be explained below with reference to drawings showing an embodiment of the invention in the molding of a rubber bellows used for the front bend of boots. A sheet 1 formed by bonding a sulfur rubber fabric 12 to a stretched stretchable fabric 11 is provided with mountain-shaped ridges 21 at regular intervals on its surface.
The gist of the invention is a method for molding a rubber bellows, which is characterized in that an unvulcanized rubber dough 12 is vulcanized by pressing and fixing it to a mold 2 in which a rubber bellows 21 is formed.
この発明において伸縮性の布帛１１は、メリヤス編布、
またはゴム糸、スパンデックスなどの弾性糸層の織布ま
たは編布で構成されている。そして未加硫ゴム生地１２
は、天然ゴム、スチレンブタジェンゴム、アクリルニト
リルゴム、ブタジェンゴム、イソプレンゴム、クロロプ
レンゴム等の合成ゴムで構成されている。これ等の伸縮
性の布帛１１と未加硫ゴム生地１２は、伸縮性の布帛１
１を未加硫ゴム生地１２の加硫後の収縮率に合わせて伸
張させた状態、例えば未加硫ゴム生地１２の加硫後の収
縮率が１０％であれば、伸縮性の布帛１１を９％前後伸
張させた状態で未加硫ゴム生地１２をロールで生地だし
すると同時に積層することによって行うことができる。In this invention, the stretchable fabric 11 is a knitted fabric,
Alternatively, it is composed of a woven or knitted fabric with an elastic thread layer such as rubber thread or spandex. And unvulcanized rubber fabric 12
is composed of synthetic rubber such as natural rubber, styrene-butadiene rubber, acrylonitrile rubber, butadiene rubber, isoprene rubber, and chloroprene rubber. These stretchable fabric 11 and unvulcanized rubber fabric 12 are the stretchable fabric 1
1 is stretched according to the shrinkage rate after vulcanization of the unvulcanized rubber fabric 12, for example, if the shrinkage rate after vulcanization of the unvulcanized rubber fabric 12 is 10%, the stretchable fabric 11 This can be done by rolling out the unvulcanized rubber fabric 12 with a roll in a state where it has been stretched by about 9% and simultaneously laminating the fabric.
そして、適宜形状に裁断して蛇腹成形用シート１として
準備される。裁断に当って、伸縮性の布帛１１が、メリ
ヤス編布のように一方方向により大きく伸縮するもので
あれば、その伸縮方向が型２の表面に設けられた山形状
の突条２１．２１・・・と直交する方向形状に裁断して
おけば、成形される蛇腹の伸縮性と屈曲性がより一層改
善される。Then, it is cut into an appropriate shape and prepared as a sheet 1 for forming bellows. When cutting, if the stretchable fabric 11 is one that expands and contracts more in one direction, such as a stockinette knitted fabric, the direction of the stretch is determined by the chevron-shaped protrusions 21, 21 and 21 provided on the surface of the mold 2. If the shape is cut in a direction perpendicular to ..., the elasticity and flexibility of the bellows to be formed will be further improved.
そしてこの発明に使用される型２は、蛇腹の用途に応じ
て適宜形状に構成され、その表面には断面形状が半円乃
至三角形状の山形突条２１．２１・・・が形成されてい
る。そして突条２１．２１・・・の両端縁部にはそれぞ
れ必要によってシート１を保持させるための支持針２２
．２２・・・、２２’。The mold 2 used in the present invention is configured to have an appropriate shape depending on the use of the bellows, and has chevron-shaped protrusions 21, 21, etc. having a semicircular to triangular cross-sectional shape formed on its surface. . At both end edges of the protrusions 21, 21, there are support needles 22 for holding the sheet 1 as necessary.
．． 22..., 22'.
２２′・・・を突設しておけば、シート１を引き伸ばし
ながらその両端縁部を支持針２２．２２・・・、２２′
、２２′・・・に突き刺して型２に固定すればその収縮
力によってシート１が型２に圧接されることになり、シ
ート１の型２に対する圧接固定が簡単である。このよう
にしてシート１を型に圧接固定した後、空気圧３〜５ｋ
ｇ／ａｄ、 １２０℃〜１６０℃で３０〜９０分で加圧
、加熱すれば。22'... are provided so that the supporting needles 22, 22..., 22' are provided at both ends while stretching the sheet 1.
, 22'... and fixing it to the mold 2 causes the sheet 1 to be pressed against the mold 2 by its contraction force, making it easy to press and fix the sheet 1 against the mold 2. After the sheet 1 is pressed and fixed to the mold in this way, the air pressure is 3 to 5 k
g/ad, pressurize and heat at 120°C to 160°C for 30 to 90 minutes.
シート１を構成する未加硫ゴム生地１２が加硫され、収
縮されて型２の表面に形成されている山形状の突条２１
．２１・・・に沿ってゴム生地１２に蛇腹状の突状１０
．１０・・・が成形される。A mountain-shaped protrusion 21 is formed on the surface of the mold 2 by vulcanizing and shrinking the unvulcanized rubber material 12 constituting the sheet 1.
．． A bellows-shaped protrusion 10 is attached to the rubber fabric 12 along 21...
．． 10... are molded.
（発明の作用効果）
この発明は１以上のように予め伸縮性の布帛１１に未加
硫ゴム生地１２を貼り合わせたシート１を型２に圧接固
定して加硫するだけなので、蛇腹の成形が極めて簡便で
低コストに成形できる。また加硫後、ゴム生地が収縮し
ても伸張された状態の伸縮性の布帛１１が収縮してもと
の状態にもどるため、加硫後、ゴムシート１と伸縮性の
布帛１１間に、実質的な収縮差が生じることなく、成形
されたゴム蛇腹が変形したり、その表面に皺が発生した
りすることなく、外観が良好なゴム蛇腹を提供すること
ができる。(Operation and Effect of the Invention) As described above, in this invention, the sheet 1 in which the unvulcanized rubber fabric 12 is bonded to the stretchable fabric 11 in advance is simply fixed to the mold 2 and vulcanized, so that the bellows can be formed. It is extremely simple and can be molded at low cost. Furthermore, even if the rubber fabric contracts after vulcanization, the stretched fabric 11 will shrink and return to its original state. A rubber bellows with good appearance can be provided without causing a substantial difference in shrinkage, without deforming the molded rubber bellows, and without causing wrinkles on its surface.
第１図はゴム蛇腹の成形状態を示す見取り図であり、第
２図は第１図のＡ−Ａ線における断面図であり、第３図
は第１図のＢ−Ｂ線における断面図である。
符合の説明
１、貼り合わせシート
１２・・・未加硫ゴム生地
１１・・・伸縮性の布帛
２、型
２１・・・突条
２２．２２’・・・支持針Fig. 1 is a sketch showing the molded state of the rubber bellows, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1. . Description of codes 1, pasting sheet 12...unvulcanized rubber fabric 11...stretchable fabric 2, mold 21...projection 22.22'...support needle
Claims (1)
に貼り合わせて形成されたシート１を、表面に一定間隔
を置いて山形状の突条２１、２１・・・を形成した型２
に圧接固定して、未加硫ゴム生地１２を加硫することを
特徴とするゴム蛇腹の成形法。Stretchable fabric 11 with unvulcanized rubber fabric 12 stretched
A mold 2 in which mountain-shaped protrusions 21, 21, . . . are formed at regular intervals on the surface of a sheet 1 formed by laminating the
A method for forming a rubber bellows, which is characterized in that an unvulcanized rubber fabric 12 is vulcanized by pressing and fixing it to a rubber bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20461990A JPH0639103B2 (en) | 1990-07-31 | 1990-07-31 | Rubber bellows molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20461990A JPH0639103B2 (en) | 1990-07-31 | 1990-07-31 | Rubber bellows molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0489213A true JPH0489213A (en) | 1992-03-23 |
| JPH0639103B2 JPH0639103B2 (en) | 1994-05-25 |
Family
ID=16493479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20461990A Expired - Lifetime JPH0639103B2 (en) | 1990-07-31 | 1990-07-31 | Rubber bellows molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639103B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054567A1 (en) * | 2016-09-20 | 2018-03-29 | Contitech Luftfedersysteme Gmbh | Air spring bellows |
-
1990
- 1990-07-31 JP JP20461990A patent/JPH0639103B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054567A1 (en) * | 2016-09-20 | 2018-03-29 | Contitech Luftfedersysteme Gmbh | Air spring bellows |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0639103B2 (en) | 1994-05-25 |
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