JP2787338B2 - Focusing and fixing of small diameter resin tube - Google Patents
Focusing and fixing of small diameter resin tubeInfo
- Publication number
- JP2787338B2 JP2787338B2 JP16852689A JP16852689A JP2787338B2 JP 2787338 B2 JP2787338 B2 JP 2787338B2 JP 16852689 A JP16852689 A JP 16852689A JP 16852689 A JP16852689 A JP 16852689A JP 2787338 B2 JP2787338 B2 JP 2787338B2
- Authority
- JP
- Japan
- Prior art keywords
- resin tube
- small
- diameter
- resin
- fixing
- 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.)
- Expired - Fee Related
Links
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14614—Joining tubular articles
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は自動車、或は各種機械装置等に給油、給気等
のために各種配管として使用される複数本の細径樹脂チ
ューブを基体に対して取付けが便利なように或いは間隔
を一定に保つように一括集中的に配管し得るようにする
ための集束固定方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention uses a plurality of small-diameter resin tubes, which are used as various pipes for lubricating and supplying air to an automobile or various mechanical devices, as a base. The present invention relates to a convergence fixing method for enabling piping to be collectively concentrated so that attachment is convenient or the interval is kept constant.
（従来の技術） 従来、この種の各種配管の多くは金属製の細径管が使
用されているが、このような細径金属管を集中配管する
ための集束固定体を得る方法としては、複数本の細径金
属管を治具上に並列的にセットし、隣接する金属管相互
の直接鑞付けするかまたは適宜の取付け金具を配してこ
れに鑞付けすることによって行なわれていた。また、並
列する複数本の金属管を適宜形状を空腔を有する金型内
に挿通させておいて、溶融樹脂を金型内に射出成形し取
付け片の成形と金属管の固定とを同時に行なわせる方法
も広く行なわれていた。(Prior art) Conventionally, many kinds of such pipes use metal thin pipes. However, as a method of obtaining a focusing fixed body for concentrating such thin metal pipes, It has been carried out by setting a plurality of small diameter metal tubes in parallel on a jig and directly brazing the adjacent metal tubes to each other or brazing them with an appropriate mounting bracket. In addition, a plurality of parallel metal tubes are inserted into a mold having a cavity with an appropriate shape, and the molten resin is injection-molded into the mold to simultaneously form a mounting piece and fix the metal tube. Widespread methods were also used.
（発明が解決すべき課題） しかしながら、近年軽量化の要求から適宜の合成樹脂
によって作られた樹脂チューブを細径管として採用する
機運が高まりつゝあり、上記したような細径管の集束固
定方法は配管が金属管によって形成されている場合には
それなりの成果が得られているが、配管が樹脂チューブ
である場合には前者の方法は全く採用することは出来
ず、また後者の方法はブラケット、スペーサー等のチュ
ーブ取付け片の成形とこれへの樹脂チューブの取付け固
定が一挙に行なえるので極めて合理的な方法であると云
えるが、実際に射出成形によって得られた集束固定体に
おける樹脂チューブの孔径が一定せず実用上問題があっ
た。(Problems to be Solved by the Invention) However, in recent years, there has been an increasing tendency to adopt a resin tube made of an appropriate synthetic resin as a small-diameter tube due to a demand for weight reduction. In the method, some results have been obtained when the pipe is formed of a metal pipe, but when the pipe is a resin tube, the former method cannot be adopted at all, and the latter method cannot be used. It can be said that this is an extremely rational method because the molding of the tube mounting pieces such as brackets and spacers and the mounting and fixing of the resin tube to this can be performed at once, but the resin in the bundle fixed body actually obtained by injection molding is considered. There was a problem in practice because the hole diameter of the tube was not constant.
本発明は細径樹脂チューブの集束固定を行なうに際し
ての上記問題点を解決し、射出成形によって取付け片の
成形と樹脂チューブの固定とを同時に行なって、しかも
樹脂チューブの潰れ等によって径の変化を来すことがな
いような樹脂チューブの集束固定方法を提供することを
目的とするものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in performing the focusing and fixing of a small-diameter resin tube, and simultaneously performs the molding of the mounting piece and the fixing of the resin tube by injection molding, and furthermore, the change in diameter due to the collapse of the resin tube or the like. It is an object of the present invention to provide a method for focusing and fixing a resin tube that does not come.
（課題を解決するための手段） 本発明者は上記の問題点について鋭意検討した結果次
のことが判かった。即ち、自動車等の給油、給気等に用
いる配管には外径20mm程度以下の極めて細径の樹脂チュ
ーブが使用されるが、射出成形に際して樹脂チューブが
例え厚肉であっても、加熱溶融した熱可塑性樹脂の金型
への射出に際して、該樹脂の保有する熱と射出圧によっ
て容易に樹脂チューブが軟化変形し、管路が潰れたり、
また潰れるまでに至らなくても変形によって所定の孔径
を保つことが困難となる。(Means for Solving the Problems) The present inventors have conducted intensive studies on the above problems and found the following. That is, a very thin resin tube having an outer diameter of about 20 mm or less is used for pipes used for oil supply, air supply, and the like of automobiles and the like. Upon injection of the thermoplastic resin into the mold, the resin tube is easily softened and deformed by the heat and injection pressure of the resin, and the conduit is crushed,
In addition, it is difficult to maintain a predetermined hole diameter due to deformation even if the hole does not collapse.
そこで本発明者は熱可塑性樹脂の金型への射出に先立
って細径樹脂チューブ内に空気、水、ブライン等の冷媒
を流通させておいて射出成形を行なうことによって、上
記問題点を解決することに成功した。Therefore, the present inventor solves the above-mentioned problems by performing injection molding by circulating a refrigerant such as air, water, or brine in a small-diameter resin tube prior to injection of a thermoplastic resin into a mold. Succeeded.
即ち本発明は適宜の間隔をもって並列的に集合配列し
た複数本の細径樹脂チューブを、所望の形状の取付け片
が形成されるような空腔を有する金型内にその所定部位
が載置されるようにして挿通配置し、各樹脂チューブ内
に適宜の冷媒を流通させつつ、該金型内に加熱溶融状態
の熱可塑性樹脂を射出した後、これを冷却固化させて取
付け片を形成するとともに並列した樹脂チューブを該取
付け片に密着固定することを特徴とする細径樹脂チュー
ブの集束固定方法である。That is, in the present invention, a predetermined portion of a plurality of small-diameter resin tubes arranged in parallel at appropriate intervals is placed in a mold having a cavity in which a mounting piece of a desired shape is formed. As described above, the thermoplastic resin in a heated and melted state is injected into the mold while the appropriate cooling medium is circulated in each resin tube, and then cooled and solidified to form an attachment piece. A method for converging and fixing a small-diameter resin tube, wherein a resin tube arranged in parallel is fixedly attached to the mounting piece.
（作 用） 以下に本発明の詳細及びその作用について、添付の図
面に基いて説明すると、第１図は本発明による細径樹脂
チューブの集束固定方法に係る金型における熱可塑性樹
脂の射出後の状態を示すものの横断面図であって、図に
おいて、１は油、気体等それぞれ異なる流路を形成する
細径樹脂チューブであり、２、２′は内部にスペーサ
ー、ブラケット等の適宜形状の空腔３を形成した金型で
ある。金型２、２′には熱可塑性樹脂の射出口４及び冷
却水の流通路５が配設されていて、空腔３内に射出口４
から射出充填された熱可塑性樹脂６による取付け片が空
腔３内で速やかに冷却固化されるよう形成されている。(Operation) The details of the present invention and the operation thereof will be described below with reference to the accompanying drawings. FIG. 1 shows a state after injection of a thermoplastic resin in a mold according to the method for converging and fixing a small-diameter resin tube according to the present invention. FIG. 1 is a cross-sectional view of the state shown in FIG. 1, in which 1 is a small-diameter resin tube which forms different flow paths for oil, gas, etc., and 2 and 2 ′ have appropriately shaped spacers, brackets and the like inside. This is a mold in which the cavity 3 is formed. The molds 2 and 2 ′ are provided with an injection port 4 for thermoplastic resin and a flow path 5 for cooling water.
The mounting piece made of the thermoplastic resin 6 injected and filled from above is formed so as to be quickly cooled and solidified in the cavity 3.
本発明において細径樹脂チューブ１の集束固定を行な
うに際しては、先ず集束固定しようとする複数本の細径
樹脂チューブ１を所望の間隔を隔てゝ平面状又は立体状
に並列して配列させ、必要に応じて適当な治具等によっ
てその並列状態を保つように仮止めしておいて、その所
望の部位を金型２、２′内に幅方向に一括的に挾持され
るように挿通配置する。次いで各樹脂チューブ１の両端
部に冷媒流通用の配管を接続して水、空気、ブライン等
の適宜の冷媒を樹脂チューブ内に流通させ、射出口４か
ら加熱溶融した熱可塑性樹脂を金型２、２′に形成され
た空腔３内に射出し、これを空腔３に充填させるととも
に冷却水流通路５に冷却水を供給して金型内の熱可塑性
樹脂を冷却固化させる。このようにすることによって、
熱可塑性樹脂は細径樹脂チューブ１の周囲に融着するよ
うにして固化し、取付け片6a、6bに細径樹脂チューブ１
を固定した集束固定体が得られる。In the present invention, when performing the focusing and fixing of the small-diameter resin tube 1, first, a plurality of small-diameter resin tubes 1 to be focused and fixed are arranged in a plane or three-dimensionally in parallel at a desired interval. The jigs are temporarily fixed so as to maintain the juxtaposed state by appropriate jigs and the like, and the desired portions are inserted and arranged in the molds 2 and 2 'so as to be collectively clamped in the width direction. . Next, pipes for refrigerant distribution are connected to both ends of each resin tube 1 to flow an appropriate refrigerant such as water, air, and brine through the resin tube, and the thermoplastic resin heated and melted from the injection port 4 is injected into the mold 2. 2 'is injected into the cavity 3 formed therein, and is filled into the cavity 3 and, at the same time, cooling water is supplied to the cooling water flow passage 5 to cool and solidify the thermoplastic resin in the mold. By doing this,
The thermoplastic resin is solidified by fusing around the small-diameter resin tube 1 and attached to the mounting pieces 6a and 6b.
Is obtained.
本発明の細径樹脂チューブの集束固定方法は上記した
如くして行なうものであるから、細径樹脂チューブ１を
並列的に挾持した金型２、２′中の空腔３内に高温に融
解された熱可塑性樹脂を射出した場合に、細径樹脂チュ
ーブ１内を流通する冷媒の冷却作用によって樹脂チュー
ブ１の軟化が防止され、これとともに冷媒流通によって
生ずるチューブの内圧によって細径樹脂チューブ１は射
出圧によって潰れて管路が閉塞したり、径が変化したり
するようなことがなく、取付け片6a、6bの成形とともに
並列状の細径樹脂チューブ１の取付け片6a、6bへの固定
が確実に行なわれる。Since the method for converging and fixing the small-diameter resin tube of the present invention is performed as described above, the small-diameter resin tube 1 is melted at a high temperature in the cavity 3 in the molds 2 and 2 'holding the small-diameter resin tube 1 in parallel. When the injected thermoplastic resin is injected, the cooling of the refrigerant flowing through the small-diameter resin tube 1 prevents the resin tube 1 from softening, and at the same time, the small-diameter resin tube 1 is formed by the internal pressure of the tube caused by the refrigerant flow. The pipes are not collapsed by the injection pressure and the pipes are not closed or the diameter is not changed, and the fixing of the parallel small-diameter resin tubes 1 to the mounting pieces 6a and 6b together with the formation of the mounting pieces 6a and 6b can be performed. It is done reliably.
従って本発明において細径樹脂チューブ内を流通させ
る冷媒は空気、水、ブラインなどの可及的高圧に加圧状
態にすることが望ましいが、余り圧力が高過ぎるとその
内圧によって、却って樹脂チューブの変形を招くことに
なるのでチューブ内圧がチューブの降伏応力未満となる
ように調整する必要がある。Therefore, in the present invention, it is desirable that the refrigerant flowing through the small-diameter resin tube is pressurized to the highest possible pressure, such as air, water, and brine. Since this causes deformation, it is necessary to adjust the internal pressure of the tube to be less than the yield stress of the tube.
次に本発明による細径樹脂チューブの集束固定方法に
ついての実施例を示す。Next, an example of a method for focusing and fixing a small-diameter resin tube according to the present invention will be described.
（実施例） それぞれ所望の長さに切断した内径6.0mm、外径8.0mm
の３本のナイロン（PA 11）製細径樹脂チューブ1aと、
内径8.0mm、外径10.0mmの１本の細径樹脂チューブ1bと
を第２図に示すように中央部にブラケット状の取付け片
6a、また両端部付近にスペーサー状の取付け片6bを配し
て取付けた集束固定体を得るに際し、各細径樹脂チュー
ブを所定の間隔をもって並列させ、その所定の部位をそ
れぞれブラケット形状及びスペーサー形状の空腔部を形
成させた射出成形用の金型２、２′に挾持させ、次いで
各細径樹脂チューブ1a、1bの両端部に接続した冷媒流通
配管の一方からそれぞれ20℃、7kgf/cm2の高圧空気を各
細径樹脂チューブ内に強制流通させておいて、金型２、
２′の射出口４から165℃の温度に溶融したポリプロピ
レン（PP）樹脂を金型内圧250kgf/cm2でもって空腔３内
に射出充填し、引続き金型の通水路５に冷却水を供給す
ることによって空腔内に射出した溶融ポリプロピレン樹
脂を冷却固化させた後、金型の冷却及び各細径樹脂チュ
ーブの冷媒の流通を停止し、細径樹脂チューブに接続し
た冷媒配管を取外して得られた集束固定体を金型から取
出した。(Example) Inner diameter 6.0mm, outer diameter 8.0mm cut to desired length respectively
Nylon (PA 11) thin resin tube 1a
A small resin tube 1b with an inner diameter of 8.0 mm and an outer diameter of 10.0 mm is attached to the center of the bracket as shown in FIG.
In order to obtain a fixed bundle attached with 6a and spacer-shaped mounting pieces 6b arranged near both ends, each small-diameter resin tube is arranged in parallel at a predetermined interval, and the predetermined parts are respectively shaped as brackets and spacers And 2 kg, respectively, at 20 ° C. and 7 kgf / cm from one of the refrigerant flow pipes connected to both ends of each of the small-diameter resin tubes 1a and 1b. 2 high-pressure air is forced to flow through each small-diameter resin tube,
A polypropylene (PP) resin melted at a temperature of 165 ° C. is injected and filled into the cavity 3 at a mold internal pressure of 250 kgf / cm 2 from the 2 ′ injection port 4, and cooling water is subsequently supplied to the water passage 5 of the mold. After cooling and solidifying the molten polypropylene resin injected into the cavity, the cooling of the mold and the flow of the refrigerant in each small-diameter resin tube are stopped, and the refrigerant pipe connected to the small-diameter resin tube is removed. The obtained fixed focusing body was removed from the mold.
得られた集束固定体の各細径樹脂チューブはそれぞれ
の取付け片6a及び6bに確実に固定されており、またそれ
ぞれその内径は何れの箇所においても略一定に保たれて
いて管路に殆んど変形ないことが確認された。Each small-diameter resin tube of the obtained focusing fixed body is securely fixed to each of the mounting pieces 6a and 6b, and the inner diameter of each tube is maintained substantially constant at any point, and almost all of the tubes are connected to the conduit. It was confirmed that no deformation occurred.
（発明の効果） 以上述べたように、本発明の方法によるときは射出成
形法を利用して、ブラケット等の取付け片の成形と細径
樹脂チューブの取付け片への集束固定とを行なうに際し
て、金型内に配置する細径樹脂チューブに冷媒配管を接
続し、樹脂チューブ内に水、空気、ブライン等の冷媒を
好ましくは高圧の状態で流通させながら射出成形を行な
うことによって、射出成形作業の実施による樹脂チュー
ブの変形を未然に防止することが出来る上に、これによ
って生産性の向上も期待することが出来るので極めて効
果的な発明であると云える。(Effects of the Invention) As described above, when the method of the present invention is used to form a mounting piece such as a bracket and to fix and fix a small-diameter resin tube to the mounting piece using an injection molding method, A refrigerant pipe is connected to a small-diameter resin tube arranged in a mold, and water, air, and a coolant such as brine are preferably injected in the resin tube while flowing in a high-pressure state. Since the deformation of the resin tube due to the embodiment can be prevented beforehand, and the productivity can be expected to be improved by this, it can be said that the invention is extremely effective.
第１図は本発明の細径樹脂チューブの集束固定方法にお
ける射出成形状態の金型内状況を示すものゝ横断面図、
第２図は本発明の細径樹脂チューブの集束固定方法によ
って得られた集束固定体の１例を示すものゝ平面図であ
る。 １、1a,1b……細径樹脂チューブ、２、２′……金型、
３……空腔部、４……射出口、５……冷却水流通路、６
……熱可塑性樹脂、6a、6b……取付け片。FIG. 1 shows a state inside a mold in an injection molding state in a method for converging and fixing a small-diameter resin tube according to the present invention.
FIG. 2 is a plan view showing an example of a convergence fixing body obtained by the convergence fixing method for a small-diameter resin tube of the present invention. 1, 1a, 1b: small resin tube, 2, 2 ': mold,
3 ... cavity, 4 ... injection port, 5 ... cooling water flow passage, 6
... Thermoplastic resin, 6a, 6b ... Mounting piece.
Claims (2)
複数本の細径樹脂チューブを、所望の形状の取付け片が
形成されるような空腔部を有する金型内にその所定部位
が載置されるようにして挿通配置し、各樹脂チューブ内
に適宜の冷媒を流通させつゝ、該金型内に加熱溶融状態
の熱可塑性樹脂を射出した後、これを冷却固化させて取
付け片を形成するとともに並列した樹脂チューブを該取
付け片に密着固定することを特徴とする細径樹脂チュー
ブの集束固定方法。1. A predetermined portion of a plurality of small-diameter resin tubes arranged in parallel at an appropriate interval is placed in a mold having a cavity for forming a mounting piece of a desired shape. While injecting and distributing an appropriate refrigerant in each resin tube while injecting the thermoplastic resin in a heated and molten state into the mold, this is cooled and solidified to form a mounting piece. A method for converging and fixing a small-diameter resin tube, wherein the formed and parallel resin tubes are closely fixed to the mounting piece.
させる請求項１記載の細径樹脂チューブの集束固定方
法。2. The method for converging and fixing a small-diameter resin tube according to claim 1, wherein the refrigerant is circulated in the resin tube in a pressurized state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16852689A JP2787338B2 (en) | 1989-06-30 | 1989-06-30 | Focusing and fixing of small diameter resin tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16852689A JP2787338B2 (en) | 1989-06-30 | 1989-06-30 | Focusing and fixing of small diameter resin tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0334825A JPH0334825A (en) | 1991-02-14 |
| JP2787338B2 true JP2787338B2 (en) | 1998-08-13 |
Family
ID=15869655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16852689A Expired - Fee Related JP2787338B2 (en) | 1989-06-30 | 1989-06-30 | Focusing and fixing of small diameter resin tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2787338B2 (en) |
-
1989
- 1989-06-30 JP JP16852689A patent/JP2787338B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0334825A (en) | 1991-02-14 |
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