JPS62104709A - Flexible mandrel for preparing curvy rubber hose - Google Patents

Flexible mandrel for preparing curvy rubber hose

Info

Publication number
JPS62104709A
JPS62104709A JP24461785A JP24461785A JPS62104709A JP S62104709 A JPS62104709 A JP S62104709A JP 24461785 A JP24461785 A JP 24461785A JP 24461785 A JP24461785 A JP 24461785A JP S62104709 A JPS62104709 A JP S62104709A
Authority
JP
Japan
Prior art keywords
flexible tube
flexible
mandrel
circumferential surface
outer circumferential
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
Application number
JP24461785A
Other languages
Japanese (ja)
Other versions
JPH0422124B2 (en
Inventor
Naoyuki Ito
尚之 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP24461785A priority Critical patent/JPS62104709A/en
Publication of JPS62104709A publication Critical patent/JPS62104709A/en
Publication of JPH0422124B2 publication Critical patent/JPH0422124B2/ja
Granted legal-status Critical Current

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  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

PURPOSE:To enable to prepare easily a hose having a multi-dimensional curvy part or a large curvature by constituting a freely deforming flexible tube having a wavy contour and a pipe-shaped covering having gaps between the bottom parts of the valley parts of the outer surface of the flexible tube and the covering. CONSTITUTION:A flexible mandrel is constituted of a flexible tube 1 and a pipe-shaped covering 2. The outer circumferential surface 10 of the flexible tube 1 have a wavy contour where peaks 10a and valleys 10b successively and alternatively continue at the cross section along the axis line X. The pipe- shaped covering 2 covers the outer circumferential surface 10 of the flexible tube 1 in such a way that it covers the peaks 10a and the valleys 10b of the outer circumferential surface 10 of the flexible tube 1 and constitutes gaps 3 between the bottom parts of the valley parts 10b of the outer surface 10 of the flexible tube 1 and the covering. When the mandrel is bent in a large curvature or multi-dimensionally, the parts of the pipe-shaped covering 2 which are inside of the bent parts thereby flow to the gaps and the shapes of the gaps 3 deform as the result.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ゴムホースなどを？Ｊ造する際に使用するマ
ンドレルに関する。マンドレルは芯体であり、ゴムホー
ス等の中央孔を形成する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to rubber hoses, etc. Concerning the mandrel used in J-building. The mandrel is a core and forms the central hole of a rubber hose or the like.

本発明は、例えば、多次元的に曲成された曲成部をもつ
ゴムホースを製造する際に芯体として利用づ−ることが
できる。The present invention can be used, for example, as a core body when manufacturing a rubber hose having a multidimensionally curved section.

［従来の技術］ 従来より、曲成部をもつゴムホースを製造プるにあたっ
ては、アルミ製や鉄製等の丸棒を予め所定の形状に曲成
して形成したマンドレルを使用し、この曲成したマンド
レルを、未加硫状態のゴムで形成したホース内に挿入し
、その状態でホースを加硫温度以上に加熱して加硫し、
その後、加硫後のホースからマンドレルを抜き取ってい
た。[Prior Art] Traditionally, when manufacturing rubber hoses with bent parts, a mandrel is used, which is made by bending a round bar made of aluminum or iron into a predetermined shape. Insert the mandrel into a hose made of unvulcanized rubber, heat the hose to a temperature above the vulcanization temperature, and vulcanize it.
Thereafter, the mandrel was removed from the vulcanized hose.

しかしながら、曲成されたマンドレルをホースに挿入し
たり、加１ｉ！ｌ（Ｕにホースからマンドレルを抜き取
る作業は容易ではなかった。そのため、製造するボース
の曲げ形状、曲率なとはＬ＋Ｊ約されたものであった。However, if a curved mandrel is inserted into the hose, it may be difficult to insert it into the hose. It was not easy to remove the mandrel from the hose. Therefore, the bending shape and curvature of the manufactured bose were approximately L+J.

故に、多次元的な曲成部をもつホース、曲率の大きな（
曲げ度合が大きいという意味）ホースを製造することは
容易ではなかった。Therefore, hoses with multidimensional curved parts, large curvature (
It was not easy to manufacture hoses (meaning a large degree of bending).

［発明が解決しようとする問題点］ 本発明は上記した実情に鑑みなされたものであり、その
目的は、多次元的な曲成部をもつホース、曲げ度合が人
さく曲率の大きなホースを製造する際に有利なマンドレ
ルを提供するに：ある。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to manufacture a hose with a multidimensional bent portion, a hose with a large bending degree, and a hose with a large curvature. To provide an advantageous mandrel:

□ □ ［Ｂ　￥１　ａ　ｅ　’Ｉｆ　２１１６１＝“０１り本
発明に係る曲管ゴムホース製造用フレキシブルマンドレ
ルは、 軸芯に沿う断面で少なくとも外周面が山部と谷部と交互
に連続する波形状をなす撓み変形自在な可撓管と、 可撓材料で形成され、該可撓管の該外周面の該山部及び
該谷部を覆うように該可撓管の該外周面に被覆され、該
可撓管の該外周面の谷部の底部との間に空隙部をもつ筒
状被覆部と、 で構成されたものである。□ □ [B ￥1 ae 'If 21161="01" The flexible mandrel for manufacturing a curved rubber hose according to the present invention has at least the outer circumferential surface in a cross section along the axis having a wave shape in which peaks and troughs continue alternately. a flexible tube capable of bending and deforming, formed of a flexible material and coated on the outer circumferential surface of the flexible tube so as to cover the peaks and valleys of the outer circumferential surface of the flexible tube; and a cylindrical covering portion having a gap between the outer circumferential surface of the flexible tube and the bottom of the trough portion.

以下構成要素に分けて説明する。The components will be explained below.

可撓管の少なくとも外周面の一部は、軸芯に沿う断面で
、山部と谷部と交互に連続する波形状をなしている。波
形状は、山部および谷部が円弧で形成された同波形状が
好ましいが、円弧をもたない又は円弧を一部しかもたな
い矩形波形状でもよい。このように少なくとも外周面の
一部が波形状をなす可撓管は、軸芯と交わる方向に撓み
変形自在である。ここで、山部および谷部は、可撓管の
周方向に１周する構成でもよく、又、スパイラル状に連
続する構成Ｃもよい。可撓管の可撓性を充分確保ゴるた
めには、可撓管の内周面は、通常、山部と谷部と交互に
連続する波形状が好ましいが、特殊な例では、山部、谷
部を有しない平滑面とすることｂ−ｒきる。可撓管の撓
み吊は大きい方が好ましい。可撓性の）尭み吊を調整す
るには、一般に、山部や谷部の大きさ、山部や谷部の曲
：邸などを調整する。可１尭管【よ、帯状の薄肉金属板
をスパイラル状に巻回して構成してもよいし、あるいは
、成形型により金属筒をこれの方向に押圧して膨出加工
することにより構成してもよい。可撓管は同−材料で該
可撓管の長ざ方向に一体的に形成されていることが好ま
しい。可撓管を形成する材料は、通常、金属であり、特
にステンレス鋼、ｒＡ素鋼、アルミ、アルミ合金、銅合
金などが好ましい。強度やｉｌＮ食性確保等の而で有利
だからである。可撓管の平均内ｔｐは、可撓管の撓みＭ
などに応じて適宜選択するが、一般に０．２〜Ｑ、４Ｉ
１ｍ程度とすることができる。At least a part of the outer circumferential surface of the flexible tube has a wavy shape in which peaks and valleys are alternately continuous in a cross section along the axis. The wave shape is preferably the same wave shape in which peaks and troughs are formed by circular arcs, but it may also be a rectangular wave shape having no circular arcs or only a portion of circular arcs. In this way, the flexible tube, in which at least a portion of the outer circumferential surface has a corrugated shape, is flexible and deformable in a direction intersecting the axis. Here, the crests and troughs may have a configuration in which they go around once in the circumferential direction of the flexible tube, or they may have a configuration C in which they continue in a spiral shape. In order to ensure sufficient flexibility of a flexible tube, it is usually preferable that the inner circumferential surface of the flexible tube has a wave shape with alternating peaks and troughs, but in special cases, the peaks and troughs , it should be a smooth surface with no valleys. It is preferable that the flexure of the flexible tube is large. In order to adjust the tuck (flexibility), generally the size of the crests and troughs, the curvature of the crests and troughs, etc. are adjusted. It may be constructed by winding a strip-shaped thin metal plate in a spiral shape, or it may be constructed by pressing a metal cylinder in this direction with a mold to bulge it. Good too. Preferably, the flexible tubes are integrally formed of the same material in the longitudinal direction of the flexible tubes. The material forming the flexible tube is usually metal, and stainless steel, RA steel, aluminum, aluminum alloy, copper alloy, etc. are particularly preferred. This is because it is advantageous in terms of strength and edibility. The average internal tp of the flexible tube is the deflection M of the flexible tube.
Although it is selected as appropriate depending on the
It can be about 1 m.

筒状被覆部は、可撓管の外周面の山部および谷部を覆う
ように可撓管の外周面に被覆されている。The cylindrical covering part covers the outer circumferential surface of the flexible tube so as to cover the peaks and valleys of the outer circumferential surface of the flexible tube.

筒状被覆部は、可撓材料で形成されており、特に加硫し
たゴム材料、あるいは軟質樹脂材料が好ましい。ゴム材
料としては、クロロプレンゴ１１系、ニトリルゴム系を
用いることができる。筒状被覆部の平均肉厚は、７ンド
レルの種類に応じて適宜選択づるが、一般に１．０〜２
．Ｑｍｍ程度とすることができる。The cylindrical covering part is made of a flexible material, and particularly preferably a vulcanized rubber material or a soft resin material. As the rubber material, chloroprenego 11 type and nitrile rubber type can be used. The average wall thickness of the cylindrical covering part is selected appropriately depending on the type of 7-drel, but is generally 1.0 to 2.
．． It can be about Qmm.

筒状被覆部は、可撓管の外周面の谷部の底部との間に空
隙部をもつ。空隙部の寸法、形状イ【どはマンドレルの
種類に応じて適宜選択する。例えば、空隙部の寸法は、
マンドレルの径方向の平均寸法で、可撓管の谷部の底部
から該可撓管の山部の頂部までの径方向寸法を１００と
したとき、２０〜３０程度と覆ることができる。The cylindrical covering has a gap between it and the bottom of the valley on the outer circumferential surface of the flexible tube. The size and shape of the cavity are selected as appropriate depending on the type of mandrel. For example, the dimensions of the void are
When the average radial dimension of the mandrel from the bottom of the valley of the flexible tube to the top of the peak of the flexible tube is 100, it can range from about 20 to 30.

筒状１！１１頂部の内周面は、これの軸芯に沿う断面で
、山部と谷部と交互に連続する波形状をなしていること
が好ましい。この場合、第１図に例示したように、筒状
被覆部の該内周面の山部は、可撓管の外周面の谷部とほ
ぼ同一ビッヂで形成されていることが好ましい。このよ
うにづれば、筒状被覆部の該内周面の山部は可Ｆｒ４管
の外周面の該谷部に嵌合し、該筒状被覆部の内周面の該
山部の頂部と可撓管の外周面の谷部の底部との間に、空
隙部を形成することができる。The inner circumferential surface of the top of the cylindrical 1!11 preferably has a wavy shape in which peaks and troughs are alternately continuous in a cross section along its axis. In this case, as illustrated in FIG. 1, it is preferable that the peaks on the inner circumferential surface of the cylindrical covering part be formed with substantially the same bits as the valleys on the outer circumferential surface of the flexible tube. In this way, the peaks on the inner circumferential surface of the cylindrical covering fit into the valleys on the outer circumferential surface of the flexible Fr4 tube, and the peaks of the peaks on the inner circumferential surface of the tubular covering fit into the valleys on the outer circumferential surface of the flexible Fr4 pipe. A gap can be formed between the outer circumferential surface of the flexible tube and the bottom of the valley.

又特殊な例では、前記空隙部を形成づるにあたっては、
可撓管の外周面の谷部を覆う筒状被覆部の部位を、気泡
をもつ材料、例えば発泡ゴム月利で形成することもでき
る。この場合には発泡ゴム材料中の気泡が空隙部を形成
覆る。In a special case, when forming the void,
The portion of the cylindrical covering portion that covers the troughs on the outer circumferential surface of the flexible tube can also be made of a material with bubbles, such as foamed rubber. In this case, the air bubbles in the foamed rubber material form and cover the voids.

筒状被覆部の外周面は平８１面であることが好ましい。It is preferable that the outer circumferential surface of the cylindrical covering part is a flat 81 plane.

ホースにマンドレルを挿入したり、ホースからマンドレ
ルを抜き取るのに有利だからである。This is because it is advantageous for inserting the mandrel into the hose and removing the mandrel from the hose.

筒状被覆部の外周面は必要に応じて断熱層で覆うことも
できる。このようにすれば筒状被覆部の劣化防止等に有
利である。The outer circumferential surface of the cylindrical covering part can be covered with a heat insulating layer if necessary. This is advantageous in preventing deterioration of the cylindrical covering portion.

なお筒状被覆部の内周面と可撓管の外周面とは、互いに
接着されていてもよいし、あるいは接着されていなくて
もよい。フレキシブルマンドレルの曲げ性を充分確保づ
るという意味では、一般に、筒状被覆部と可撓管とは非
接着であることが好ましい。可撓管の外周面に形成され
た山部および谷部がスパイラル状に連続する場合には、
筒状被覆部の内周面の山部および谷部もスパイラル状に
連続して形成する。そして、筒状被覆部をまわしながら
、筒状被覆部の内周面の山部および谷部を可撓性の外周
面の谷部および山・部に嵌合させ、以て筒状被覆部を可
撓管に非接着で被覆できる。Note that the inner circumferential surface of the cylindrical covering portion and the outer circumferential surface of the flexible tube may or may not be bonded to each other. In order to ensure sufficient bendability of the flexible mandrel, it is generally preferable that the cylindrical covering part and the flexible tube are not bonded to each other. When the peaks and valleys formed on the outer circumferential surface of the flexible tube are continuous in a spiral shape,
The peaks and valleys on the inner circumferential surface of the cylindrical covering part are also formed continuously in a spiral shape. Then, while turning the cylindrical covering part, the peaks and troughs on the inner circumferential surface of the cylindrical covering part are fitted into the troughs and peaks/parts on the flexible outer circumferential surface, thereby tightening the cylindrical covering part. Can be coated on flexible tubes without adhesive.

［作用］ 内周面が平滑な筒状被覆部を可撓管の外周面に被覆した
だけの構成のフレキシブルマンドレルも考えられる。こ
の場合には、該マンドレルを曲成づると、曲成したマン
ドレルの内側部にしわが生じ易い。このようにしわが生
じると、マンドレルの可撓性を損い、マンドレルを多次
元的に曲成しにくいし、その曲率も低下しがちで曲げに
くくなりがちである。この点本発明に係るフレキシブル
マンドレルでは筒状被覆部は、可撓管の外周面の谷部の
底部との間に空隙部をもつ構成である。そのため、フレ
キシブルマンドレルを多次元的に又大きな曲率で曲成し
曲げ度合を大きくした場合であっても、筒状被覆部の部
分が空隙部に流動し、空隙部の形状が変形する。よって
フレキシブルマンドレルの曲成部の内側に上記しわが生
じにくくなる。そのため、フレキシブルマンドレルを曲
成する際の可撓性の低下の問題解決に有利である。[Function] A flexible mandrel can also be considered in which the outer peripheral surface of a flexible tube is simply coated with a cylindrical covering portion having a smooth inner peripheral surface. In this case, when the mandrel is bent, wrinkles are likely to occur on the inner side of the bent mandrel. When such wrinkles occur, the flexibility of the mandrel is impaired, making it difficult to bend the mandrel multidimensionally, and its curvature tends to decrease, making it difficult to bend. In this regard, in the flexible mandrel according to the present invention, the cylindrical covering part has a gap between it and the bottom of the valley on the outer circumferential surface of the flexible tube. Therefore, even when the degree of bending is increased by bending the flexible mandrel multidimensionally and with a large curvature, a portion of the cylindrical covering portion flows into the gap, deforming the shape of the gap. Therefore, the wrinkles are less likely to form inside the curved portion of the flexible mandrel. Therefore, it is advantageous in solving the problem of decreased flexibility when bending a flexible mandrel.

次に、本発明に係るフレキシブルマンドレルの代表的な
使用方法を説明する。まず、未加硫ゴムホース内にフレ
キシブルマンドレルを挿入し、その状態でフレキシブル
マンドレルと共にホースを所定の形状に曲成づる。その
状態でボースを加硫氾麿に達づる程に加熱し、ホースを
加硫する。次に、フレキシブルマンドレルを挿入した状
態のホースの曲成を戻し、例えばほぼ−直線状に戻し、
ホースからフレキシブルマンドレルを汰きとる。Next, a typical method of using the flexible mandrel according to the present invention will be explained. First, a flexible mandrel is inserted into an unvulcanized rubber hose, and in this state, the hose is bent into a predetermined shape together with the flexible mandrel. In this state, heat the hose to the point where it reaches the vulcanization level and vulcanize the hose. Next, the hose with the flexible mandrel inserted is unbent, for example, returned to an approximately straight line;
Vacuum the flexible mandrel from the hose.

すると、フレキシブルマンドレルを抜きとられたホース
は、自己の弾性により、所定の曲成形状に戻る。Then, the hose from which the flexible mandrel has been removed returns to its predetermined bent shape due to its own elasticity.

［発明の効果］ 本発明に係るフレキシブルマンドレルでは、筒状被覆部
は、可撓管の外周面の谷部の底部との間に空隙部をもつ
構成である。故に本発明に係るフレキシブルマンドレル
を用いれば、マンドレルを多次元的に曲成した場合であ
っても、又マンドレルを大きな曲率で曲成し曲げ度合を
大きくした場合であっても、該マンドレルの曲成部の内
側部にしわは生じにくい。よってマンドレルを曲成した
ときの、該マンドレルの可撓性の低下、マンドレルの曲
成曲率の低下といった問題の解決に有利である。勿論マ
ンドレルを多次元的に曲成することも容易である。従っ
て、曲率の大きな曲成部をもつホース、多次元的な曲成
部をもつホースの製造に右利である。[Effects of the Invention] In the flexible mandrel according to the present invention, the cylindrical covering portion has a gap between it and the bottom of the valley on the outer circumferential surface of the flexible tube. Therefore, by using the flexible mandrel according to the present invention, even if the mandrel is bent multidimensionally, or even if the mandrel is bent with a large curvature and the degree of bending is increased, the bending of the mandrel can be improved. Wrinkles are less likely to form on the inner part of the inner part. Therefore, it is advantageous to solve problems such as a decrease in the flexibility of the mandrel and a decrease in the bending curvature of the mandrel when the mandrel is bent. Of course, it is also easy to bend the mandrel multidimensionally. Therefore, it is advantageous for manufacturing hoses with curved parts with large curvatures and hoses with multidimensional curved parts.

［実施例］ （第１実施例） 本発明に係る第１実施例を第１図およびｆ１２図に示す
。[Example] (First Example) A first example according to the present invention is shown in Fig. 1 and Fig. f12.

本実施例に係るフレキシブルマンドレルは、可撓管１と
筒状被覆部２とで構成されている。可撓管１の外周面１
ｏは、第１図に示すように、軸芯Ｘに沿う断面で、山部
１０ａおよび谷部１０ｂが交りに連続する波形状をなし
ている。特に本実施例では山部１０ａおよび谷部１０ｂ
が円弧をもつ同波形状をなしている。又、可撓管１の内
周面１１も、第１図に承りように、軸芯Ｘに沿う断面で
、円弧をもつ山部１１ａおよび谷部１１ｂが交互に連続
する波形状をなしている。従って可撓管１は、軸芯Ｘと
交わる方向に、即ち、第１図に示す矢印方向に撓み変形
自在である。なお可撓管１の厚みはＱ２ｍｍ桿”’　（
’あり、可撓管１を形成する材料はステンレス講である
。The flexible mandrel according to this embodiment is composed of a flexible tube 1 and a cylindrical covering part 2. Outer peripheral surface 1 of flexible tube 1
As shown in FIG. 1, o is a cross section taken along the axis X, and has a wave shape in which peaks 10a and valleys 10b are continuous and intersect. In particular, in this embodiment, the peak portion 10a and the valley portion 10b
has the same wave shape with an arc. Furthermore, as shown in FIG. 1, the inner circumferential surface 11 of the flexible tube 1 also has a wavy shape in which arcuate peaks 11a and troughs 11b are alternately continuous in a cross section along the axis X. . Therefore, the flexible tube 1 is flexible and deformable in the direction intersecting the axis X, that is, in the direction of the arrow shown in FIG. The thickness of the flexible tube 1 is Q2mm rod"' (
Yes, the material forming the flexible tube 1 is stainless steel.

筒状被覆部２は、加硫した高ニトリルゴム材料で形成さ
れている。筒状被覆、ＩＳ２は、可撓管１の外周面１０
の山部１０ａおよび谷部１０ｂ＠覆うＪ、うに、可撓管
１の外周面１０に被覆されている。The cylindrical covering portion 2 is made of a vulcanized high nitrile rubber material. The cylindrical covering IS2 is the outer circumferential surface 10 of the flexible tube 1.
The outer circumferential surface 10 of the flexible tube 1 is coated with the crests 10a and troughs 10b of the flexible tube 1.

ここで、第２図に示すように、筒状′！＆１部２の内周
面２０は、これの軸芯に沿う断面で、円弧をもつ１１１
部２０ａＪ５よび谷部２０ｂが交互に連続する波形状を
なしている。筒状被覆部２の内周面２０の山８Ｂ　２０
　ａと可撓管１の外周面１０の谷部１０ｂとはほぼ同一
ピッチで形成されている。そして、筒状１＆覆部２の内
周面２０の山部２０ａは、可撓管１の外周面１０の谷部
１０ｂに第２図に示すように部分的に１医合している。Here, as shown in FIG. 2, a cylindrical '! &1 The inner circumferential surface 20 of part 2 is a cross section along the axis of this, and has a circular arc 111
The portions 20aJ5 and the valley portions 20b form a continuous wave shape. Peak 8B 20 on the inner circumferential surface 20 of the cylindrical covering part 2
a and the troughs 10b of the outer circumferential surface 10 of the flexible tube 1 are formed at substantially the same pitch. The peaks 20a of the inner circumferential surface 20 of the cylindrical tube 1 and the cover 2 are partially aligned with the valleys 10b of the outer circumferential surface 10 of the flexible tube 1, as shown in FIG.

この結果、筒状被覆部２の内周面２０の山部２０ａと可
撓管１の外周面１０の谷部１０ｂの底部との間には、空
隙部３が形成されている。ここで第２図に示す空隙部３
の径方向の最大寸法りは、可撓管１の外周面１０の谷部
１０ｂの底部から山部１０ａの頂部までの径方向寸法１
」を１００としたとき、２０〜３０程麿である。As a result, a gap 3 is formed between the peak 20a of the inner peripheral surface 20 of the cylindrical covering 2 and the bottom of the trough 10b of the outer peripheral surface 10 of the flexible tube 1. Here, the cavity 3 shown in FIG.
The maximum radial dimension of the flexible tube 1 is the radial dimension 1 from the bottom of the valley 10b to the top of the peak 10a of the outer circumferential surface 10 of the flexible tube 1.
” is 100, it is about 20 to 30 times.

上記フレキシブルマンドレルの製造方法を以下に説明す
る。即ち、ゴム押出機により連続して押出すゴムを可撓
管１の外周面に被覆する。次に加ｔｕ９［ｉａ度以上に
加熱してゴムを加硫し、以て筒状被覆部２を形成する。The method for manufacturing the above flexible mandrel will be explained below. That is, the outer peripheral surface of the flexible tube 1 is coated with rubber that is continuously extruded by a rubber extruder. Next, the rubber is vulcanized by heating to a temperature of tu9[ia degree or higher, thereby forming the cylindrical covering portion 2.

上記のように本実施例に係るフレキシブルマンドレルで
は、筒状？！！！覆部２は、可撓管１の外周面１０の谷
部１０ｂの底部との間に空隙部３をもつ構成である。そ
のためマンドレルを大きな曲率で曲成し曲げ度合を大き
くした場合、又、マンドレルを多次元的に曲成した場合
には、曲成された部位の内側の筒状被覆部２の部分が空
隙部３に流動づる。よって、空隙部３の形状が変形する
。従ってしわは生じにくくなる。そのため、マンドレル
を曲成したときのマンドレルの可撓性の低下、マンドレ
ルの曲成曲率の低下といった問題の解決に右利である。As mentioned above, the flexible mandrel according to this embodiment has a cylindrical shape? ! ! ! The cover 2 has a gap 3 between it and the bottom of the valley 10b of the outer peripheral surface 10 of the flexible tube 1. Therefore, when the mandrel is bent with a large curvature and the degree of bending is increased, or when the mandrel is bent multidimensionally, the part of the cylindrical covering part 2 inside the bent part becomes the cavity 3. The flow is flowing. Therefore, the shape of the cavity 3 is deformed. Therefore, wrinkles are less likely to occur. Therefore, it is useful for solving problems such as a decrease in the flexibility of the mandrel when the mandrel is bent and a decrease in the bending curvature of the mandrel.

勿論マンドレルを多次元的に曲成するときにも有利て・
ある。Of course, it is also advantageous when bending mandrels multidimensionally.
be.

次に、本実施例に係るフレキシブルマンドレルの代表的
な使用方法を説明する。まず、第３図に示づように未加
硫ゴム製のホース１００内に７レヤシブルマンドレルを
挿入し、その状態でフレキシブルマンドレルと共にホー
ス１００を所定の形状に曲成し、その状態で、第３図に
示ずように保持貝２００にホース１００を保持する。そ
して加硫温度に達する程にフレキシブルマンドレルと共
にホース１００を加熱し、ホース１００を加硫する。加
ｔｉＩ！１ｍには、フレキシブルマンドレルを挿入した
状態のホース１００をほぼ一直線状に戻し、ホース１０
０からフレキシブルマンドレルを抜きとる。Next, a typical method of using the flexible mandrel according to this embodiment will be explained. First, as shown in FIG. 3, a 7-flexible mandrel is inserted into a hose 100 made of unvulcanized rubber, and in this state, the hose 100 is bent into a predetermined shape together with the flexible mandrel. 3, the hose 100 is held in the holding shell 200. Then, the hose 100 is heated together with the flexible mandrel until the vulcanization temperature is reached, and the hose 100 is vulcanized. KatiI! 1 m, the hose 100 with the flexible mandrel inserted is returned to almost a straight line, and the hose 10
Pull out the flexible mandrel from 0.

上記した実施例では、空隙部３の形状が変形するため、
マンドレルを曲成したとき曲成部は偏平になりにくい。In the embodiment described above, since the shape of the cavity 3 is deformed,
When the mandrel is bent, the bent portion is less likely to become flat.

従って製造したホースの偏肉も極めて小さいという利点
が生じ、ホースの流量損失、ホースの耐圧性能の確保の
而で有利である。Therefore, there is an advantage that the thickness deviation of the manufactured hose is extremely small, which is advantageous in terms of reducing the flow loss of the hose and ensuring the pressure resistance performance of the hose.

（第２実施例） 本発明に係るフレキシブルマンドレルの第２実施例を第
４図に示す。第２実施例に係るフレキシブルマンドレル
では、基本的には第１実施例とほぼ同一の構成であり、
従ってほぼ同一の作用効果を果たす。ただし第２実施例
では、筒状被覆部２は、断熱層６でｉ！！Ｉ覆されてい
る。このように断熱層６で被覆づれば、筒状被覆部２の
劣化防止に有利である。又断熱層６を摩ｒＭ係数の小さ
な材料で形成すれば、マンドレルをボース１００から扱
きとる際に、摩擦係数が少なくなって俵ぎ取り作業を容
易ならしめ得る。(Second Embodiment) FIG. 4 shows a second embodiment of the flexible mandrel according to the present invention. The flexible mandrel according to the second embodiment basically has almost the same configuration as the first embodiment,
Therefore, they achieve almost the same effect. However, in the second embodiment, the cylindrical covering part 2 has i! ! I have been overturned. Covering with the heat insulating layer 6 in this manner is advantageous in preventing deterioration of the cylindrical covering portion 2. Furthermore, if the heat insulating layer 6 is formed of a material with a small coefficient of friction rM, the coefficient of friction will be reduced when the mandrel is handled from the boce 100, making the bale removal work easier.

（第３実施例） 本発明に係るフレキシブルマンドレルの第３実施例を第
５図に示す。第３実施例では、空隙部７は筒状被覆部２
の内周面２０の山部２０ａに内在されている。(Third Embodiment) A third embodiment of the flexible mandrel according to the present invention is shown in FIG. In the third embodiment, the cavity 7 is formed by the cylindrical covering part 2.
It is included in the peak portion 20a of the inner circumferential surface 20 of.

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

第１図および第２図は本発明の第１実施例を示し、第１
図は第１実施例に係るフレキシブルマンドレルの要部の
縦断側面図であり、第２図は第１図の主要部の拡大断面
図であり、第３図はマンドレルの使用状態を示す斜視図
である。 第４図は本発明の第２実施例を示し、上半分を示す要部
の１ｉ１１！ｌｉ側面図である。第５図は本発明の第３
実施例を示し、要部の縦断側面図である。 図中、１は可撓管、１０は可撓管の外周面、１０ａは山
部、１０ｂは谷部、７７は可撓管の内周面、１１ａは山
部、１１ｂは谷部、２は筒状被覆部、３は空隙部をそれ
ぞれ示す。 第１図 第２図1 and 2 show a first embodiment of the present invention;
The figure is a vertical sectional side view of the main part of the flexible mandrel according to the first embodiment, FIG. 2 is an enlarged sectional view of the main part of FIG. be. FIG. 4 shows a second embodiment of the present invention, showing the upper half of the main part 1i11! li side view. FIG. 5 shows the third embodiment of the present invention.
FIG. 2 is a longitudinal cross-sectional side view of a main part of the embodiment. In the figure, 1 is a flexible tube, 10 is an outer circumferential surface of the flexible tube, 10a is a peak, 10b is a valley, 77 is an inner circumferential surface of the flexible tube, 11a is a peak, 11b is a valley, and 2 is a In the cylindrical covering portion, 3 indicates a cavity. Figure 1 Figure 2

Claims (6)

【特許請求の範囲】[Claims] （１）軸芯に沿う断面で少なくとも外周面の一部が山部
と谷部と交互に連続する波形状をなす撓み変形自在な可
撓管と、 可撓材料で形成され、該可撓管の該外周面の該山部及び
該谷部を覆うように該可撓管の該外周面に被覆され、該
可撓管の該外周面の谷部の底部との間に空隙部をもつ筒
状被覆部と、 で構成された曲管ゴムホース製造用フレキシブルマンド
レル。(1) A flexible tube that is flexibly deformable and has at least a part of its outer peripheral surface in a wave shape with alternating peaks and troughs in a cross section along the axis, and the flexible tube is made of a flexible material. a cylinder that is coated on the outer circumferential surface of the flexible tube so as to cover the peaks and the valleys of the outer circumferential surface of the flexible tube, and has a gap between the outer circumferential surface of the flexible tube and the bottom of the valley; A flexible mandrel for manufacturing curved rubber hoses, consisting of a shaped covering part and. （２）筒状被覆部の内周面は、これの軸芯にそう断面で
山部と谷部と交互に連続する波形状をなし、該筒状被覆
部の該内周面の該山部は、可撓管の谷部とほぼ同一ピッ
チで形成され、該可撓管の該外周面の該谷部に嵌合して
おり、 該筒状被覆部の該内周面の該山部の頂部と該可撓管の該
外周面の該谷部の該底部との間に空隙部が形成されてい
る特許請求の範囲第１項記載の曲管ゴムホース製造用フ
レキシブルマンドレル。(2) The inner circumferential surface of the cylindrical covering part has a wavy shape in which crests and troughs are alternately continuous in a cross section along the axis thereof, and the crests on the inner periphery of the cylindrical covering part are formed at approximately the same pitch as the troughs of the flexible tube, and fit into the troughs on the outer circumferential surface of the flexible tube, and fit into the troughs on the inner circumferential surface of the cylindrical covering part. 2. The flexible mandrel for manufacturing a curved rubber hose according to claim 1, wherein a gap is formed between the top and the bottom of the valley on the outer circumferential surface of the flexible tube. （３）筒状被覆部は、加硫したゴム材料で形成されてい
る特許請求の範囲第１項記載の曲管ゴムホース製造用フ
レキシブルマンドレル。(3) The flexible mandrel for manufacturing a curved rubber hose according to claim 1, wherein the cylindrical covering portion is formed of a vulcanized rubber material. （４）筒状被覆部の外周面は平滑面である特許請求の範
囲第１項記載の曲管ゴムホース製造用フレキシブルマン
ドレル。(4) The flexible mandrel for manufacturing a curved rubber hose according to claim 1, wherein the outer peripheral surface of the cylindrical covering portion is a smooth surface. （５）可撓管は、これの長さ方向に一体的に同一材料で
形成されている特許請求の範囲第１項記載の曲管ゴムホ
ース製造用フレキシブルマンドレル。(5) The flexible mandrel for manufacturing a bent rubber hose according to claim 1, wherein the flexible tube is integrally formed of the same material in the length direction thereof. （６）可撓管はステンレス鋼で形成されている特許請求
の範囲第１項記載の曲管ゴムホース製造用フレキシブル
マンドレル。(6) A flexible mandrel for manufacturing a curved rubber hose according to claim 1, wherein the flexible tube is made of stainless steel.
JP24461785A 1985-10-31 1985-10-31 Flexible mandrel for preparing curvy rubber hose Granted JPS62104709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24461785A JPS62104709A (en) 1985-10-31 1985-10-31 Flexible mandrel for preparing curvy rubber hose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24461785A JPS62104709A (en) 1985-10-31 1985-10-31 Flexible mandrel for preparing curvy rubber hose

Publications (2)

Publication Number Publication Date
JPS62104709A true JPS62104709A (en) 1987-05-15
JPH0422124B2 JPH0422124B2 (en) 1992-04-15

Family

ID=17121402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24461785A Granted JPS62104709A (en) 1985-10-31 1985-10-31 Flexible mandrel for preparing curvy rubber hose

Country Status (1)

Country Link
JP (1) JPS62104709A (en)

Also Published As

Publication number Publication date
JPH0422124B2 (en) 1992-04-15

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