JPS6030541B2 - Air bladder manufacturing method - Google Patents

Description

【発明の詳細な説明】 本発明は第１図に示す如く２枚の加硫ゴムシート１，１
′にて空気を封入する部分ａ（以下空気封入ゾーンと称
す）と封入した空気が外に漏れないように周囲をシール
した部分ｂ（以下シールゾーンと称す）とを構成し、空
気封入ゾーンに空気を流通させることにより第２図、第
３図に示す如く脹らませたり、菱めたりして用いる空気
袋の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION As shown in FIG.
′ consists of a part a that encloses air (hereinafter referred to as the air entrapment zone) and a part b whose surroundings are sealed to prevent the enclosed air from leaking outside (hereinafter referred to as the seal zone). This invention relates to a method of manufacturing an air bag which is used by inflating or deflating it as shown in FIGS. 2 and 3 by circulating air.

従来か）る空気袋の製造方法として２枚の未加硫ゴムシ
ートの間に中金型を介在させて金型内で加圧加硫する方
法が一般に行なわれている。As a conventional method for producing air bags, a method is generally used in which a middle mold is interposed between two unvulcanized rubber sheets and the rubber sheets are pressurized and vulcanized in the mold.

ところが、かかる方法は空気袋の各サイズに応じた中金
型を準備しなくてはならず、又連続成型に不向きで製品
コストが高価につく欠点がある。又か）る方法にて製造
した空気袋は中金型の取り出しの関係上、製品の口元が
大きなものしか製造出来ない欠点がある。However, this method has the drawback that it is necessary to prepare an inner mold according to each size of the air bag, and it is not suitable for continuous molding, resulting in high product cost. Furthermore, air bags manufactured by the above method have the disadvantage that only products with large openings can be manufactured due to the need to take out the inner mold.

そこで本発明者は連続成型が出来、しかも製品の口元が
小さな空気袋の製造を可能にするため、中金型に代えて
離型粉、離型液或は離型シートを用いて空気袋を製造す
ることを試みた。Therefore, in order to make it possible to manufacture air bags that can be continuously molded and have a small opening for the product, the inventor developed an air bag using mold release powder, mold release liquid, or mold release sheet instead of a middle mold. I tried to manufacture it.

ところが離型粉や離型液を用いた時には空気封入ゾーン
ａにおけるゴムシート間が部分的に接着した部分が生じ
るばかりか空気封入ゾーンａとシールゾーンｂとの境界
線がジグザグ状となったり、空気袋を構成するゴムシー
トの厚みの不揃い等を生じ耐久性の悪い空気袋しか製造
出来ない欠点があった。又離型シートとしてセロフアン
紙或は離型粉を塗布した紙を用いた時には前記欠点はほ
とんど解決出来たが成型時に機型シートと未加硫ゴムシ
ートとの間に巻き込まれる空気、或は禾加硫ゴムシート
中に含まれた空気が離型シート上の一箇所に集中し易く
、これが加硫時の加熱により膨張して脹れてあばた部を
形成し、不良品の発生が多く、均一の肉質を有する空気
袋を製造出来ない欠点があった。又か）る方法によって
得た空気袋は繰り返し使用中に離型シートが空気袋の出
入口を塞いだりする欠点もあった。そこで本発明者は離
型性を有する雛型シートに代えて雛型性を有しない紙を
未加硫ゴムシート中に挟んで加熱加圧し加硫した後、紙
を中心に両側に加硫ゴムシートを引き裂いたところ、加
硫したゴムシートの両面に１枚の紙をセパレートした如
き薄膜状の紙層を接着形成出来ることに着眼し、この原
理を応用して空気袋の製造方法を提供せんとするものあ
る。However, when mold release powder or mold release liquid is used, not only do parts of the rubber sheets in the air encapsulation zone a become partially adhered, but also the boundary line between the air encapsulation zone a and the sealing zone b becomes zigzag-like. This method has the drawback that the thickness of the rubber sheet constituting the air bag may be uneven, and only air bags with poor durability can be manufactured. Furthermore, when cellophane paper or paper coated with mold release powder was used as the mold release sheet, most of the above-mentioned drawbacks could be solved; The air contained in the vulcanized rubber sheet tends to concentrate in one place on the release sheet, and this expands and swells due to the heating during vulcanization, forming pock marks, which often results in defective products and is not uniform. There was a drawback that it was not possible to manufacture an air bag with a flesh quality of . Furthermore, the air bags obtained by the method described above also have the disadvantage that the release sheet sometimes blocks the entrance and exit of the air bag during repeated use. Therefore, the present inventor proposed that instead of a template sheet with mold releasability, paper without template properties was sandwiched between unvulcanized rubber sheets, heated and pressurized to vulcanize, and then vulcanized rubber was placed on both sides centering on the paper. When the sheet was torn apart, they noticed that a thin film-like paper layer, similar to that of a separate sheet of paper, could be formed on both sides of a vulcanized rubber sheet, and by applying this principle, they provided a method for manufacturing air bags. There are some that do.

即ち先ず第４図に示す如く離型性を有しない紙、例えば
事務用紙、新聞紙等よりなる厚み４仏〜１００仏よりな
る紙にて袋状部２と空気挿入路３とを型取った紙型Ｋを
作成し、この紙型Ｋを２枚の未加硫ゴムシート間にサン
ドイッチ状に挟しだ未加稀の成型物を得る。That is, first, as shown in FIG. 4, the bag-shaped portion 2 and the air insertion passage 3 are molded from paper that does not have releasability, such as office paper, newspaper, etc., and has a thickness of 4 mm to 100 mm. A mold K is prepared, and this paper mold K is sandwiched between two unvulcanized rubber sheets to obtain an uncured molded product.

次に第５図に示す如く未加流の成形物をプレスにて加熱
加圧して加硫し、ゴムシートー間に前記紙型Ｋを一体に
形成した加稀した成型物を得る。次に第６図に示す如く
紙型Ｋの周囲に適宜中のシールゾーンｂを成型加工する
と共に空気挿入用パイプを取り付けるため、紙型Ｋの空
気挿入路３の端面３ａを一部露出させて成型加工する。
又、空気挿入用パイプを第８図に示す如くリング状金具
５にて固定するため空気挿入路３の周囲に切欠き４を設
ける。しかる後第７図に示す如く空気挿入路３の端面３
ａに空気挿入用パイプ６の端面をねじ込むと、空気挿入
路３は紙型Ｋを中心に容易に両側のゴムシート１，１′
にハク鱗出来、介在した紙型の約半分の厚みにセパレー
トされた如く薄紙７を接着状態にてゴムシートー，１′
の両面に形成出来、空気挿入用パイプ６の装着を簡単に
行なうことが出来た。次に第８図に示す如く空気挿入用
パイプ６をリング状金具５にて固定して空気挿入用パイ
プ６より空気を送入し脹らますと紙型Ｋは全面にわたっ
て空気挿入路同様約半分の厚みにセパレートされた如く
、加硫ゴムシート１，１′の両面に紙型Ｋの厚み約半分
が各々加硫ゴムシート１，１′の両面に接した袋状部に
形成した空気袋を製造することが出来た。Next, as shown in FIG. 5, the uncured molded product is vulcanized by heating and pressing in a press to obtain a molded product in which the paper mold K is integrally formed between the rubber sheets. Next, as shown in FIG. 6, a seal zone b is formed around the paper pattern K as appropriate, and in order to attach an air insertion pipe, a portion of the end surface 3a of the air insertion path 3 of the paper pattern K is exposed. Process the molding.
Further, a notch 4 is provided around the air insertion path 3 in order to fix the air insertion pipe with a ring-shaped metal fitting 5 as shown in FIG. After that, as shown in FIG.
When the end face of the air insertion pipe 6 is screwed into a, the air insertion path 3 can be easily inserted into the rubber sheets 1, 1' on both sides centering on the paper mold K.
The thin paper 7 is glued to the rubber sheet 1' so that the thin paper 7 has a thickness of about half that of the intervening paper mold.
The air insertion pipe 6 could be easily attached. Next, as shown in Fig. 8, the air insertion pipe 6 is fixed with the ring-shaped metal fitting 5, and air is introduced from the air insertion pipe 6 to inflate it, so that the paper mold K covers about half of the entire surface like the air insertion path. As shown in FIG. I was able to manufacture it.

前記製造方法において雛型性を有しない紙型Ｋとして２
００〜５００仏の厚紙等について種々と実験した結果に
おいても前記同機、紙型Ｋを約半分づつの厚みにセパレ
ートした如く、厚紙の厚み約半分を加硫ゴムシートの両
面に接着して袋状部を形成した空気袋を製造することが
出来た。2 as the paper type K that does not have template properties in the above manufacturing method.
As a result of various experiments with 00 to 500 French cardboard, etc., it was found that in the same machine, paper type K was separated into approximately half the thickness, and about half the thickness of the cardboard was glued to both sides of the vulcanized rubber sheet to form a bag. We were able to manufacture an air bag with a section formed therein.

何故この様に１枚の紙がセパレートしてゴムシートの両
面に接着するかは確かではないが、紙中の空気又はゴム
シートと紙との間にまき込まれる空気或はゴムシート中
に含まれる空気や水分を毛細管現象にて紙が吸収し、未
加硫ゴムシート加硫時の加熱によってこの空気が紙をセ
パレートし易くするためではないかと思われる。尚、ゴ
ムシートは耐久性に応じ補強層を埋入したものであって
もよい。It is not clear why a piece of paper separates and adheres to both sides of the rubber sheet in this way, but it is possible that air in the paper, air caught between the rubber sheet, or air contained in the rubber sheet. It is thought that this is because the paper absorbs the air and moisture contained in the paper by capillary phenomenon, and this air makes it easier to separate the paper by heating during vulcanization of the unvulcanized rubber sheet. Note that the rubber sheet may have a reinforcing layer embedded therein depending on its durability.

本発明の空気袋の製造方法は上述の如くゴムシートとゴ
ムシートとの間に介在させる中金型として雛型性を有せ
ず且つ１枚の紙型を用いたことにより、この１枚の紙型
が未加硫ゴムシート間になじみ易いので、未加流成型物
の成型時に未加硫ゴムシート間に巻き込む空気を最も少
なく出来ると共に、巻き込んだ空気が紙型全面にわたっ
て分散され易いので、空気眼くれや、空気袋の内面にア
バタが生じ難くなり、肉厚の均一な耐久性の良い空気袋
を提供することが出来る。As described above, the method for producing an air bag of the present invention uses a single paper mold without having a template property as the inner mold interposed between the rubber sheets. Since the paper mold easily fits between the unvulcanized rubber sheets, it is possible to minimize the amount of air trapped between the unvulcanized rubber sheets during molding of the uncured molded product, and the trapped air is easily dispersed over the entire surface of the paper mold. It is possible to provide a highly durable air bag with a uniform wall thickness and less possibility of air bulge and avatars on the inner surface of the air bag.

又、離型性を有しない紙にて袋状部と空気挿入路を型取
った紙型を中金型として用い、この紙型をセパレート状
に空気袋の両面のゴムシートに接着して製造出来るので
空気袋製造後紙型を取り出す必要もなく又、使用中に空
気挿入路を塞ぐ欠点も全くない。又、紙型を製造後取り
出す必要がないので空気挿入路の口元を小さく出来、空
気挿入路口元まで前記紙型をセパレートした紙をゴムシ
ートの両面に形成出来るので、空気挿入用パイプの挿着
時の力は紙と金属又はプラスチックとの摩擦力となり、
ゴムと金属又はプラスチックの摩擦力に比らべ小さく（
静止摩擦係数の比は約１／２）スムーズとなる。更に中
金型に紙型を使用しているので屈曲性を有し、製造後取
り出す必要もないので連続成型加流が可能で安価に製造
出来る。In addition, a paper mold with a bag-shaped part and an air insertion path made of paper that does not have mold releasability is used as the middle mold, and this paper mold is adhered separately to rubber sheets on both sides of the air bag. Therefore, there is no need to take out the paper mold after manufacturing the air bag, and there is no problem of blocking the air insertion path during use. In addition, since there is no need to take out the paper pattern after production, the opening of the air insertion path can be made smaller, and paper with the paper pattern separated up to the opening of the air insertion path can be formed on both sides of the rubber sheet, making it easier to insert the air insertion pipe. The force of time becomes the frictional force between paper and metal or plastic.
Smaller than the frictional force between rubber and metal or plastic (
The ratio of static friction coefficients is approximately 1/2) and is smooth. Furthermore, since a paper mold is used for the middle mold, it has flexibility and there is no need to take it out after manufacturing, so continuous molding can be carried out and manufacturing can be done at low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の空気袋の一例を示す平面図、第２図は第
１図の空気袋が萎んだ状態を示す側断面図、第３図は第
１図の空気袋が脹らんだ状態を示す側断面図。 第４図は本発明の空気袋製造用の中型として用いる紙型
の平面図、第５図〜第７図は本発明の空気袋の製造過程
を説明するための平面図、第８図は空気挿入用パイプの
取り付け状態を示す部分断面図。１・…・・ゴムシート
、２・・・・・・紙型に型取った袋状部、３・・・…紙
型に型取った空気挿入路、４・・・・・・切欠き、５・
・・・・・リング状金具、６・・・・・・空気挿入用パ
イプ、７・・・・・・薄紙、ａ…・・・空気封入ゾーン
、ｂ・・・・・・シールゾーン、Ｋ・…・・紙型。 第１図 第２図 第３図 第４図 第５図 第６図 第７図 第８図Fig. 1 is a plan view showing an example of a conventional air bag, Fig. 2 is a side sectional view showing the air bag shown in Fig. 1 in a deflated state, and Fig. 3 is a state in which the air bag shown in Fig. 1 is inflated. FIG. FIG. 4 is a plan view of a paper mold used as a medium mold for manufacturing the air bag of the present invention, FIGS. 5 to 7 are plan views for explaining the manufacturing process of the air bag of the present invention, and FIG. FIG. 3 is a partial cross-sectional view showing how the insertion pipe is attached. 1...Rubber sheet, 2...Bag-shaped part made into a paper mold, 3...Air insertion path made into a paper pattern, 4...Notch, 5.
...Ring-shaped metal fitting, 6 ...Pipe for air insertion, 7 ... Thin paper, a ... Air sealing zone, b ... Seal zone, K ...Paper type. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

【特許請求の範囲】[Claims] １ 未加硫ゴムシートと未加硫ゴムシートとの間に袋状
部と空気挿入路を型取つた離型性を有しない１枚の紙型
を挾んで成型した未加硫成型物を、加熱加圧して加硫し
、しかる後空気挿入路にパイプを挿着固定し、空気を入
れて膨らませて袋状部を形成したことを特徴とする空気
袋の製造方法。1. An unvulcanized molded product made by sandwiching a sheet of paper molding with a bag-shaped part and an air insertion path and having no releasability between the unvulcanized rubber sheets, A method for manufacturing an air bag, which comprises vulcanizing it by heating and pressurizing it, then inserting and fixing a pipe into an air insertion path, and inflating it with air to form a bag-shaped part.