JPH0295822A - Manufacture of bent hose - Google Patents
Manufacture of bent hoseInfo
- Publication number
- JPH0295822A JPH0295822A JP24835788A JP24835788A JPH0295822A JP H0295822 A JPH0295822 A JP H0295822A JP 24835788 A JP24835788 A JP 24835788A JP 24835788 A JP24835788 A JP 24835788A JP H0295822 A JPH0295822 A JP H0295822A
- Authority
- JP
- Japan
- Prior art keywords
- hose
- bent
- continuous
- flexible mandrel
- shape
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000009751 slip forming Methods 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 39
- 238000004073 vulcanization Methods 0.000 claims description 14
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000005060 rubber Substances 0.000 claims description 9
- 238000007796 conventional method Methods 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/08—Bending or folding of tubes or other profiled members
- B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
- B29K2105/246—Uncured, e.g. green
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分針〉
この発明はゴムまたは合成ゴムよりなる曲りホースの製
造方法に関する＝
〈従来の技術〉
従来、ゴムまたは合成ゴムよりなる曲りホースの製造方
法には、次のような方法がある。[Detailed Description of the Invention] <Industrial Application Minute Hand> This invention relates to a method for manufacturing a bent hose made of rubber or synthetic rubber = <Prior Art> Conventionally, a method for manufacturing a bent hose made of rubber or synthetic rubber has , there are the following methods.
（１）未加硫状態のホースからマンドレルを抜取り、そ
のホースを切断してから、製品ごとの曲げマンドレルを
、切断した各ホースに挿入して加硫する方法。(1) A method in which a mandrel is removed from an unvulcanized hose, the hose is cut, and a bent mandrel for each product is inserted into each cut hose and vulcanized.
（２）−次加硫（半加硫）したホースからマンドレルを
抜取り、そのホースを切断してから、製品ごとの曲げマ
ンドレルを、切断した各ホースに挿入して２次加硫する
方法。(2) - A method in which a mandrel is removed from a post-vulcanized (semi-vulcanized) hose, the hose is cut, and a bending mandrel for each product is inserted into each cut hose for secondary vulcanization.
〈発明が解決しようとする課題〉
しかし、上述した従来の曲りホースの製造方法にあって
は、下記のような問題点がある。<Problems to be Solved by the Invention> However, the above-described conventional method for manufacturing a bent hose has the following problems.
即ち、（１）の方法では、ホースからマンドレルを抜取
るとき、マンドレルが長尺の場合、ホースが未加硫のた
めホースにふくれ等の塑性変形が発生して、正常なマン
ドレルの抜取りができないという問題があった。That is, in method (1), when the mandrel is removed from the hose, if the mandrel is long, plastic deformation such as blistering occurs in the hose because the hose is unvulcanized, and the mandrel cannot be removed normally. There was a problem.
また、（２）の方法においては、半加硫状態で形状を出
して２次加硫を行うため、２次加硫後にスプリングバッ
クが発生し、製品ごとの曲げ形状がばらつくという問題
があった。In addition, in method (2), since the shape is created in a semi-vulcanized state and secondary vulcanization is performed, springback occurs after secondary vulcanization, resulting in variations in the bent shape of each product. .
この発明は上記にかんがみなされたものであり、曲りホ
ースの湾曲形状が繰返して連続形成された連続曲げ成形
器を用いて、フレキシブルマンドレルを挿着した長尺の
未加硫状態のホースを加硫することにより、均一な形状
品質を有する曲りホースを効率的に得ることができる曲
りホースの製造方法の提供を目的とするものである。This invention has been made in view of the above, and uses a continuous bending machine in which the curved shape of the bent hose is repeatedly and continuously formed to vulcanize a long unvulcanized hose with a flexible mandrel inserted therein. It is an object of the present invention to provide a method for manufacturing a curved hose that can efficiently obtain a curved hose having uniform shape quality.
＜ｉｎを解決するための手段〉
この発明は上記目的を達成するためになされたものであ
り、
フレキシブルマンドレルを使ってゴムホースを押出し成
形し、上記フレキシブルマンドレルを挿着したままの長
尺の未加硫状態のホースを、少なくともｔ４位の曲りホ
ースの形状に対応する湾曲形状が繰返して連続形成され
た曲げ成形溝を有する連続曲げ成形器に嵌装して加硫を
行い、加硫後に上記フレキシブルマンドレルを抜取り、
そのホースを上記１単位の長さに切断して行う曲りホー
スの製造方法である。<Means for Solving In> The present invention has been made to achieve the above object, and involves extrusion molding a rubber hose using a flexible mandrel, and forming a long unprocessed rubber hose with the flexible mandrel inserted. Vulcanization is performed by fitting the sulfurized hose into a continuous bending machine having a bending groove in which a curved shape corresponding to the shape of the curved hose at position t4 is repeatedly formed, and after vulcanization, the flexible Remove the mandrel,
This is a method for manufacturing a curved hose, in which the hose is cut into lengths of one unit.
〈実施例〉 以下、この発明の一実施例を説明する。<Example> An embodiment of this invention will be described below.
まず、可撓性の大きい弾性高分子材料（例えばＥＰＤＭ
等）からなる棒状体のフレキシブルマンドレル１へ、弾
性高分子材料（例えばＭＢＲ等）を押出し成形によりカ
バーリングし、内管ゴム層３を形成する。更に、常法に
より補強繊維をブレードし繊維補強層４を形成する。そ
の上に弾性高分子材料（例えばＥＣＯ，ＣＲ等）を押出
し成形によりカバーリングして、外管ゴム層５を形成し
、フレキシブルマンドレル１を挿着した長尺の未加硫状
態のホース２ｂを製造する（第４図参照）、この長尺の
ホース２ｂは、例えば、全長４０ｍ程度の長さを１押出
し単位として押出し成形される。First, a highly flexible elastic polymer material (e.g. EPDM) is used.
An elastic polymer material (for example, MBR, etc.) is covered by extrusion molding onto a flexible mandrel 1 in the form of a rod, which is made of a rubber mandrel (such as MBR), thereby forming an inner tube rubber layer 3. Furthermore, the reinforcing fibers are braided using a conventional method to form the fiber reinforcing layer 4. Thereon, an elastic polymer material (e.g. ECO, CR, etc.) is covered by extrusion molding to form an outer tube rubber layer 5, and a long unvulcanized hose 2b with a flexible mandrel 1 inserted therein. The long hose 2b to be manufactured (see FIG. 4) is extruded, for example, with a total length of about 40 m as one extrusion unit.
次いで、このホース２ｂをフレキシブルマンドレル１を
挿着したまま連続曲げ成形器６Ａに嵌装する。Next, this hose 2b is fitted into a continuous bending machine 6A with the flexible mandrel 1 attached thereto.
第１図はその連続曲げ成形器６Ａの平面図を示し、第２
図は同側面図、第３図は同拡大断面図である。FIG. 1 shows a plan view of the continuous bending machine 6A, and the second
The figure is a side view of the same, and FIG. 3 is an enlarged sectional view of the same.
図に示すように、連続曲げ成形器６Ａは、実施例では円
形平板状の基板７の上面に曲げ成形溝１０Ａが設けられ
ている。この曲げ成形溝１０Ａはホース２ｂを収容可能
な長さを有するとともに、ホース２ｂが略埋没する深さ
のＵ字状断面に形成されて、基板７の外周部から中央部
にかけて渦巻キ状に配設されている。そして、曲げ成形
溝１０Ａの形状は、最終製品としての曲りホース２の１
個の形状に対応する湾曲形状を１単位として、その湾曲
形状が多数繰返して連続形成されているなお、７は連続
曲げ成形器６Ａの積重ね用のスペーサであり、９は積重
ね時の軸貫通用の貫通孔である。As shown in the figure, in the embodiment of the continuous bending machine 6A, a bending groove 10A is provided on the upper surface of a circular flat plate-shaped substrate 7. The bending groove 10A has a length capable of accommodating the hose 2b, is formed in a U-shaped cross section deep enough to substantially bury the hose 2b, and is arranged in a spiral shape from the outer periphery to the center of the substrate 7. It is set up. The shape of the bending groove 10A is the same as that of the bent hose 2 as a final product.
The curved shape corresponding to the shape of each piece is regarded as one unit, and the curved shape is repeated many times to form a continuous unit. In addition, 7 is a spacer for stacking the continuous bending machine 6A, and 9 is a spacer for passing through the shaft when stacking. This is a through hole.
この連続曲げ成形器６Ａの曲げ成形溝１０Ａに、長尺の
ホース２ｂを埋没させるように嵌装した後（第３図参照
）、その連続曲げ成形器６Ａを１ないし複数個積重ねて
、常法によって加硫を行う加硫が終ったら、フレキシブ
ルマンドレル１を挿着した状態の長尺のホース２ｂを、
連続曲げ成形器６Ａより取出し、そのホース２ｂより、
フレキシブルマンドレル１を水圧抜取り機等によって抜
取る。これにより、第５図に示すように曲りホース２を
１単位Ａとして、その単位Ａが繰返して連続するホース
２ａが得られる。After fitting the long hose 2b so as to bury it in the bending groove 10A of the continuous bending machine 6A (see Fig. 3), one or more continuous bending machines 6A are stacked one on top of the other, and then After the vulcanization is completed, the long hose 2b with the flexible mandrel 1 inserted is
Take it out from the continuous bending machine 6A, and from the hose 2b,
The flexible mandrel 1 is extracted using a hydraulic extractor or the like. As a result, as shown in FIG. 5, the bent hose 2 is made into one unit A, and the hose 2a in which the unit A is repeated and continuous is obtained.
次いで、このホース２ａを単位Ａの長さ、即ち第５図の
切断線１１で切断して、所定の曲りホース２を得ること
かできる。Next, this hose 2a is cut to a length of unit A, that is, along the cutting line 11 in FIG. 5, to obtain a predetermined curved hose 2.
このように製造された曲りホース２は、フレキシブルマ
ンドレル１を挿着したままのホース２ｂが、連続曲げ成
形器６Ａの曲げ成形溝１０ Ａの周壁に拘束されて加硫
成形されるので、フレキシブルマンドレル１の抜取り時
の塑性変形がない。しかも、スプリングバックの発生が
なく、均一な形状品質を有する曲りホース２が得られた
。また、上述の抜取られた長尺のフレキシブルマンドレ
ル１は、次の曲りホース製造作業に再使用されることと
なる。The bent hose 2 manufactured in this way is vulcanized while the hose 2b with the flexible mandrel 1 still attached thereto is restrained by the peripheral wall of the bending groove 10A of the continuous bending machine 6A. 1. There is no plastic deformation during extraction. Furthermore, a bent hose 2 with uniform shape quality and no springback was obtained. Further, the long flexible mandrel 1 that has been pulled out will be reused in the next bending hose manufacturing operation.
なお、この発明は上述の実施例に限定されるものではな
く、例えば、異なった湾曲形状を有する２単位以上の曲
りホースを、同時に曲げ成形することができる。Note that the present invention is not limited to the above-described embodiments, and for example, two or more units of curved hoses having different curved shapes can be simultaneously bent and formed.
その−例をあげれば第７図に示すように、２単位の湾曲
形状からなる曲げ成形溝１０Ｂを有する連続曲げ成形器
６Ｂを用いて製造が行われる。この曲げ成形溝１０Ｂは
、第８図に示す一方の曲りホースに対応した単位Ｂの湾
曲形状と、他方の曲りホースに対応した単位Ｃの湾曲形
状とが、交互に繰返して連続する形状に形成される。こ
の曲げ成形溝１０Ｂにより、長尺のホース１２ａが成形
され、切断線１１で切断されて、単位Ｂ、Ｃに相当する
２単位の曲りホースを得ることができる。For example, as shown in FIG. 7, manufacturing is performed using a continuous bending machine 6B having a bending groove 10B having two units of curved shape. This bending groove 10B is formed into a continuous shape in which a curved shape of unit B corresponding to one curved hose shown in FIG. 8 and a curved shape of unit C corresponding to the other curved hose are repeated alternately. be done. A long hose 12a is formed by the bending groove 10B and cut along the cutting line 11 to obtain two units of bent hose corresponding to units B and C.
同様にして、更に多数単位の曲りホースを同時に製造す
ることもできる。Similarly, it is also possible to simultaneously manufacture many units of bent hoses.
また、曲げ成形溝１０Ａは２次元形状のものを示したが
、３次元形状として立体的に湾曲した曲りホースを成形
すること゛もできる。Further, although the bending groove 10A is shown as having a two-dimensional shape, it is also possible to form a three-dimensionally curved curved hose as a three-dimensional shape.
更に、連続曲げ成形器６Ａの基板７の外形は、角形状で
あってもよく、特にその形状は限定されるものではない
。Furthermore, the outer shape of the substrate 7 of the continuous bending machine 6A may be angular, and the shape is not particularly limited.
また、曲りホース２の層形成、およびその材質は特に限
定されないことは勿論である。Moreover, it goes without saying that the layer formation of the curved hose 2 and the material thereof are not particularly limited.
〈発明の効果〉
以上説明したように、この発明の曲りホースの製造方法
は、フレキシブルマンドレルを使ってゴムホースを押出
し成形し、フレキシブルマンドレルを挿着したままの長
尺の未加硫状態のホースを、少なくとも１１１位の曲り
ホースの形状に対応する湾曲形状が繰返して連続形成さ
れた曲げ成形溝を有する連続曲げ成形器に嵌装して加硫
を行い、加硫後にフレキシブルマンドレルを抜取り、そ
のホースを１単位の長さに切断して行う方法であるから
、従来例のように未加硫状態のホースから、フレキシブ
ルマンドレルを抜取ることによるホースのふくれ等の型
性変形の発生がなくなる。<Effects of the Invention> As explained above, the method for manufacturing a curved hose of the present invention involves extrusion molding a rubber hose using a flexible mandrel, and producing a long unvulcanized hose with the flexible mandrel inserted. , vulcanization is performed by inserting the flexible mandrel into a continuous bending machine having a bending groove in which a curved shape corresponding to the shape of the curved hose at least 111th position is repeatedly and continuously formed, and after vulcanization, the flexible mandrel is pulled out and the hose is Since this method is performed by cutting the hose into one unit length, it is possible to eliminate mold deformation such as blistering of the hose due to removing the flexible mandrel from the unvulcanized hose as in the conventional example.
また、連続曲げ成形器の曲げ成形溝で曲げ形状を規定し
て加硫成形するので、半加硫状態で形状を出した後、２
次加硫した場合に生ずるスプリングバックがなくなり、
均一な形状品質を有する曲りホースを得ることができる
。In addition, since the bending shape is defined by the bending groove of the continuous bending machine and vulcanization is performed, after the shape is formed in a semi-vulcanized state,
Eliminates springback that occurs during subsequent vulcanization.
A bent hose with uniform shape quality can be obtained.
更に、ホースが長尺の状態で、多数の湾曲形状が成形さ
れるとともに、その長尺状態でフレキシブルマンドレル
が抜取りできるので、曲りホース１個ごとの曲げマンド
レルの挿入、抜取りの手間が省け、また、１次、２次加
硫の必要がなく、効率的に曲りホースを製造できる効果
を奏する。Furthermore, since a large number of curved shapes are formed while the hose is long, and the flexible mandrel can be removed while the hose is in the long state, the effort of inserting and removing the bending mandrel for each bent hose can be saved. , there is no need for primary and secondary vulcanization, and it is possible to efficiently manufacture bent hoses.
第１図はこの発明の曲りホースの製造方法の実施例に使
用する連続曲げ成形器の平面図、第２図は同じく一部破
断側面図、
第３図は連続曲げ成形器にホースを嵌装した状態を示す
拡大断面図、
第４図はフレキシブルマンドレルを挿着したままの長尺
のホースを示す一部切欠説明図、第５図は加硫後にフレ
キシブルマンドレルが抜取られた長尺のホースの一部を
示す外形図、第６図はこの発明の方法により得られた曲
りホースを示す外形図、
第７図は他の連続曲げ成形器の一例を示す平面図、
第８図は第７図の連続曲げ成形器を用いて加硫されフレ
キシブルマンドレルが抜取られた状態の長尺のホースの
一部を示す外形図である。
１・・・フレキシブルマンドレル、
２・・・曲りホース、
２ａ、２ｂ、１２ａ−ホース、
６Ａ、６Ｂ・・・連続曲げ成形器、
１０Ａ、ＩＯＢ・・・曲げ成形溝。
特 許 出 願 人
豊田合成株式会社
第
図
第
図
第
図Fig. 1 is a plan view of a continuous bending machine used in an embodiment of the method for manufacturing a bent hose of the present invention, Fig. 2 is a partially cutaway side view of the same, and Fig. 3 is a view of a hose fitted into the continuous bending machine. Figure 4 is a partially cutaway explanatory view showing the long hose with the flexible mandrel still attached, and Figure 5 is the long hose with the flexible mandrel removed after vulcanization. FIG. 6 is an outline diagram showing a bent hose obtained by the method of the present invention; FIG. 7 is a plan view showing an example of another continuous bending machine; FIG. 8 is a diagram showing FIG. FIG. 2 is an external view showing a part of a long hose that has been vulcanized using a continuous bending machine and has a flexible mandrel removed. DESCRIPTION OF SYMBOLS 1...Flexible mandrel, 2...Bending hose, 2a, 2b, 12a-hose, 6A, 6B...Continuous bending machine, 10A, IOB...Bending forming groove. Patent application Toyoda Gosei Co., Ltd.
Claims (1)
形し、前記フレキシブルマンドレルを挿着したままの長
尺の未加硫状態のホースを、少なくとも１単位の曲りホ
ースの形状に対応する湾曲形状が繰返して連続形成され
た曲げ成形溝を有する連続曲げ成形器に嵌装して加硫を
行い、加硫後に前記フレキシブルマンドレルを抜取り、
そのホースを前記１単位の長さに切断して曲りホースを
製造することを特徴とする曲りホースの製造方法。A rubber hose is extrusion-molded using a flexible mandrel, and a curved shape corresponding to the shape of at least one unit of curved hose is continuously formed by repeatedly forming a long unvulcanized hose with the flexible mandrel inserted therein. Vulcanization is performed by inserting the flexible mandrel into a continuous bending machine having a bending groove, and after vulcanization, the flexible mandrel is pulled out,
A method for manufacturing a curved hose, characterized in that the hose is cut into the length of one unit to produce a curved hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24835788A JPH0295822A (en) | 1988-09-30 | 1988-09-30 | Manufacture of bent hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24835788A JPH0295822A (en) | 1988-09-30 | 1988-09-30 | Manufacture of bent hose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0295822A true JPH0295822A (en) | 1990-04-06 |
Family
ID=17176898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24835788A Pending JPH0295822A (en) | 1988-09-30 | 1988-09-30 | Manufacture of bent hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0295822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2048064A2 (en) * | 1991-10-11 | 1994-03-01 | Vincke S A | Procedure for the manufacture of rubber tubes with straight and curved sections. |
-
1988
- 1988-09-30 JP JP24835788A patent/JPH0295822A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2048064A2 (en) * | 1991-10-11 | 1994-03-01 | Vincke S A | Procedure for the manufacture of rubber tubes with straight and curved sections. |
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