JPS61238201A - Production of shoe outer sole - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、熱可塑性ゴム又はプラスチックを使用して、
簡単に、発泡した靴外底を製造する方法に関する。Detailed description of the invention (a) Industrial application field The present invention uses thermoplastic rubber or plastic to
The present invention relates to a simple method of manufacturing a foamed shoe outsole.

（ロ）従来の技術 従来、前記のような靴外底の製造法としては、例えば、
次のような方法が実施されていた。以下その方法を図面
により説明する。(b) Conventional technology Conventionally, as a method for manufacturing the above-mentioned shoe outsole, for example,
The following methods were implemented: The method will be explained below with reference to the drawings.

所要の発泡剤、充填剤、架橋割当を混合した熱可塑性１
．２ポリブタジエンゴム等の混合物を、下型の平滑面よ
りなる長方体状空窩部（図示せず）に充填し、上型を載
置しく図示せず）、加圧加熱し、第１図に示すようにシ
ート（１）を得る。Thermoplastic 1 mixed with required blowing agents, fillers and crosslinking quotas
．． 2 A mixture of polybutadiene rubber and the like is filled into a rectangular cavity (not shown) consisting of a smooth surface of the lower mold, and the upper mold is placed (not shown) and heated under pressure. A sheet (1) is obtained as shown in .

シート（１）は、例えば、体積が４倍程度になるように
発−泡させるのが普通であるが、歪みをなくし、縮まな
いようにするために一日間室温で放置後、刃型を用い点
線（２）の部分で切断し、第２図にしめずような靴外底
よりやや小さくしかも厚い成形物を得、これに剥き加工
を施し、第３図及び第４図に示すような略最終形状に近
い靴外底（４）を得る。The sheet (1) is usually foamed to about four times its volume, but in order to eliminate distortion and prevent shrinkage, the sheet (1) is left at room temperature for one day and then foamed using a blade mold. Cut along the dotted line (2) to obtain a molded product that is slightly smaller and thicker than the outsole of a shoe, as shown in Figure 2, and then peeled to form a molded product as shown in Figures 3 and 4. A shoe outsole (4) close to the final shape is obtained.

このような表面平滑な靴外底を第５図に示すように、彫
刻された面（５）を存する下型（６−１）の靴外底形状
空窩部（７−１）に充填し、上型（８−１）を載置し、
加圧・加熱し、体積がシート（１）を基準とすれば２．
５倍になるように厚み方向に押圧し縦、横方向に押し広
げて、第６図に示すような意匠面（５）を有する靴外底
（９）が製造されていた。As shown in FIG. 5, such a shoe outsole with a smooth surface is filled into the shoe outsole shaped cavity (7-1) of the lower mold (6-1) which has the carved surface (5). , place the upper mold (8-1),
Pressurize and heat, and if the volume is based on sheet (1), 2.
A shoe outsole (9) having a designed surface (5) as shown in FIG. 6 was manufactured by pressing in the thickness direction so as to increase the thickness by five times and spreading it out in the vertical and horizontal directions.

（ハ）発明が解決しようとする問題点 前記従来の製造法は、シート（１）を、歪みをとり縮ま
ないようにするために、−日間放置しなければならず、
その上刃型で切断し、その成形物（３）に剥き加工を施
さなければならないため、時間、手間を要し、コストア
ップの原因となっていた。本発明は、このような従来の
製造法が有していた欠点を解決しようとするものである
。(c) Problems to be solved by the invention In the conventional manufacturing method, the sheet (1) must be left for - days in order to avoid distortion and shrinkage.
The molded product (3) must be cut with the upper blade die and peeled, which requires time and effort and causes an increase in costs. The present invention aims to solve the drawbacks of such conventional manufacturing methods.

（ニ）問題を解決するための手段 本発明は、下型の平滑面よりなる靴外底形状空窩部に、
発泡剤その他の所要の配合剤が混合された熱可塑性ゴム
又はプラスチック混練物を充填し、上型を載置し、加圧
・加熱し、混練物を発泡・成形させ所定形状の成形物を
得る工程と、前記工程で得られた成形物を熱いまま直ち
に、成形物と略同一形状で彫刻された面よりなる下型の
靴外底形状空窩部に充填し、上型に載置し、加圧・加熱
し、成形物の表面に彫刻面を形成する工程とよりなるこ
とを特徴とするものである。(d) Means for solving the problem The present invention provides a hollow part in the shape of the outer sole made of the smooth surface of the lower mold.
A thermoplastic rubber or plastic kneaded product mixed with a blowing agent and other necessary ingredients is filled, an upper mold is placed, pressure is applied and heated, and the kneaded product is foamed and molded to obtain a molded product of a predetermined shape. Immediately filling the molded product obtained in the above step while hot into a cavity in the shape of a shoe outer sole of a lower mold, which is made of a surface engraved with substantially the same shape as the molded product, and placing it on an upper mold; This process is characterized by the process of applying pressure and heating to form a carved surface on the surface of the molded product.

熱可塑性ゴム又はプラスチックとしては、１゜２ポリブ
タジエンゴム、エチレン−酢酸ビニル共重合体が使用さ
れる。As the thermoplastic rubber or plastic, 1.degree.2 polybutadiene rubber and ethylene-vinyl acetate copolymer are used.

又、前段の工程で混練物を発泡・成形させて得られた成
形物は、後段の工程で、下型の靴外底形状空窩部に作業
中容易に充填し易いような大きさのものでなければなら
ず、その上、上型を載置して加圧・加熱したときに厚み
方向に押圧され、縦、横方向に押し広げられ、所定の彫
刻面が確実に現出されるように、後段工程で使用される
下型の靴外底形状空窩部の深さよりも相当大きな厚さを
有するものでなければならない。In addition, the molded product obtained by foaming and molding the kneaded material in the first step is of a size that can be easily filled into the hollow part of the outer sole shape of the lower mold during the work in the second step. In addition, when the upper mold is placed and pressed and heated, it will be pressed in the thickness direction and expanded in the vertical and horizontal directions, ensuring that the desired carved surface will appear. In addition, it must have a thickness considerably greater than the depth of the hole in the outer sole shape of the lower mold used in the subsequent process.

（ホ）実施例 先ず、下記配合に従い、ゴム混練物をつくる。(e) Examples First, a rubber kneaded product is prepared according to the following formulation.

熱可塑性１．２ポリブタジエンゴム　　　　１００　重
を部ホワイトカーボン　　　　　　２０〃 第三ブチル・クル；・パーオキサイド　　　　　　　　
　　０．７　　〃アゾジカルボンアシド　　　　　６　
〃第７図に示すように、この混練物を平滑面（１１）よ
りなる下型（６−２）の空窩部（７−２）に入れ、上型
（８−２）を載置し、１５５℃の温度で１２分間プレス
加硫を行い、下型（６−２）よりとり出し、混練物（１
０）の体積の４倍になるように発泡・成形させる。この
成形物は、第３図及び第４図に示すように、略最終形状
に近く、最終形状よりも縦、横方向のサイズは小さく、
厚みは大きい、表面平滑な靴外底（４）となっている。Thermoplastic 1.2 polybutadiene rubber 100 parts White carbon 20 Tertiary butyl chloride peroxide
0.7 Azodicarbonic acid 6
〃As shown in Fig. 7, this kneaded material is put into the cavity (7-2) of the lower mold (6-2) made of a smooth surface (11), and the upper mold (8-2) is placed on it. , Press vulcanization was performed at a temperature of 155°C for 12 minutes, taken out from the lower mold (6-2), and the kneaded material (1
It is foamed and molded to have a volume four times that of 0). As shown in FIGS. 3 and 4, this molded product is close to the final shape, and the size in the vertical and horizontal directions is smaller than the final shape.
The outer sole (4) is thick and has a smooth surface.

このような表面平滑な靴外底（４）を、熱いまま（約１
５０℃）、第５図に示すように、彫刻された面（５）を
有する下型（６−１）の靴外底形状空窩部（７−１）に
充填し、１６０’Ｃの温度で１分間加圧・加熱し、体積
が混合物（１０）の２．５倍になるように、厚み方向に
押圧し、縦、横方向に十分押し広げると、第６図に示す
ような意匠面（５）を有する靴外底（９）〔比重０．３
５、硬さ６５（Ｃタイプ）、引張強さ２３ｋｇ／　ｃｆ
ｆｌ、伸び２５０％〕が製造される。この工程で、第３
図および第４図に示すような略最終形状に近い靴外底（
４）が有していた歪もなくなり、いわゆる縮みとりの作
用も果たす。Heat such a smooth outer sole (4) while it is still hot (approximately 1
As shown in Fig. 5, the shoe outer sole shaped cavity (7-1) of the lower mold (6-1) having the engraved surface (5) is filled, and the temperature is 160'C. Press and heat for 1 minute, press in the thickness direction so that the volume is 2.5 times that of mixture (10), and spread it sufficiently in the vertical and horizontal directions to form a designed surface as shown in Figure 6. (5) Shoe outsole (9) [specific gravity 0.3
5. Hardness 65 (C type), tensile strength 23 kg/cf
fl, elongation 250%] is manufactured. In this process, the third
The outer sole of the shoe (which is close to the final shape as shown in Figures and Figure 4)
The distortion that 4) had is also eliminated, and it also functions as a so-called shrinkage remover.

くべ）効果 従来の方法の場合に於ては、熱可塑性ゴム又はプラスチ
ックを使用して発泡した靴外底を製造するには、体積が
４倍程度になるように発泡したシートを歪をなくし縮ま
ないようにするために一日放置しなければならず、しか
も、その後刃型で打抜き、しかもそれに剥き加工を施し
、略最終形状に近くなるように手間をかけなければなら
ないが、本発明の方法で靴外底を製造した場合には、最
初のプレス加硫時に略最終形状る近くなるように発泡成
形し、それを直ちに、次の成形工程（意匠等を付与する
加圧・加熱する工程）に移すので、放置する時間と剥き
加工とが不要となり、時間と手間とが大幅に省けた。Effects: In the case of conventional methods, in order to manufacture foamed outsoles using thermoplastic rubber or plastic, a sheet that has been foamed to about four times its volume is undistorted and shrunk. However, the method of the present invention requires leaving it for a day to ensure that it does not form, and then punching it with a cutting die and then peeling it to make it almost the final shape. When the outsole of a shoe is manufactured, it is foam-molded during the first press vulcanization so that it approximates the final shape, and it is immediately followed by the next molding process (the process of pressurizing and heating to add designs, etc.). Since the material is transferred to a container, there is no need to leave it for a while and there is no need for peeling, which greatly saves time and effort.

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

第１図は従来の靴外底の製造法に於て使用する発泡した
シートの斜視図、第２図は第１図のシートより切断して
得られた成形物の斜視図、第３図は第２図のシートを剥
き加工して得られた、又は、本発明の最初の工程で得ら
れた、略最終形状に近い全表面平滑な靴外底の斜視図、
第４図は第３図のＡ−Ａ線断面図、第５図は従来のそし
て本発明の靴外底の製造法に於ける最終工程を示す断面
図、第６図は従来のそして本発明の靴外底の製造法で得
られた靴外底の斜視図、第７図は本発明の靴外底の製造
法の最初の工程を示す断面図である。 １・・・シート、２・・・切断個所を示す線、３・・・
シート（１）を（２）で切断して得られた成形物、４・
・・全表面平滑な略最終形状の靴外底、５・・・彫刻さ
れた面、６・・・下型、７・・・空窩部、８・・・上型
、９・・・意匠面等を有する靴外底、１０・・・熱可塑
性ゴム又はプラスチック混練物、１１・・・平滑面。Figure 1 is a perspective view of a foamed sheet used in the conventional manufacturing method for outsole of shoes, Figure 2 is a perspective view of a molded product obtained by cutting the sheet of Figure 1, and Figure 3 is A perspective view of an outsole of a shoe whose entire surface is smooth, which is close to the final shape, obtained by peeling the sheet shown in FIG. 2 or obtained in the first step of the present invention;
FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3, FIG. 5 is a cross-sectional view showing the final step in the manufacturing method of the conventional shoe outsole and the present invention, and FIG. 6 is the conventional method and the present invention. FIG. 7 is a perspective view of a shoe outsole obtained by the method of manufacturing an outsole of the present invention, and FIG. 7 is a sectional view showing the first step of the method of manufacturing an outsole of the present invention. 1... Sheet, 2... Line indicating the cutting location, 3...
Molded product obtained by cutting sheet (1) at (2), 4.
・・Outsole of the shoe having a substantially final shape with a smooth entire surface, 5: Carved surface, 6: Lower mold, 7: Hollow part, 8: Upper mold, 9: Design 10: Thermoplastic rubber or plastic kneaded material; 11: Smooth surface.

Claims (1)

【特許請求の範囲】[Claims] 下型の平滑面よりなる靴外底形状空窩部に、発泡剤その
他の所要の配合剤が混合された熱可塑性ゴム又はプラス
チック混練物を充填し、上型を載置し、加圧・加熱し、
混練物を発泡・成形させ所定形状の成形物を得る工程と
、前記工程で得られた成形物を熱いまま直ちに、成形物
と略同一形状で彫刻された面よりなる下型の靴外底形状
空窩部に充填し、上型に載置し、加圧・加熱し、成形物
の表面に彫刻面を形成する工程とよりなることを特徴と
する靴外底の製造法。A thermoplastic rubber or plastic kneaded material mixed with a foaming agent and other necessary compounding agents is filled into the hollow part of the shoe outsole formed by the smooth surface of the lower mold, and the upper mold is placed on it, and then pressurized and heated. death,
A process of foaming and molding the kneaded material to obtain a molded product of a predetermined shape, and immediately molding the molded product obtained in the above process while still hot, forming a shoe outer sole shape of a lower mold having a surface engraved with substantially the same shape as the molded product. A method for manufacturing a shoe outsole, which comprises the following steps: filling a cavity, placing it on an upper mold, pressurizing and heating it, and forming a carved surface on the surface of the molded product.