JPS6036143A - Manufacture of double wall pipe with joint section - Google Patents
Manufacture of double wall pipe with joint sectionInfo
- Publication number
- JPS6036143A JPS6036143A JP58145200A JP14520083A JPS6036143A JP S6036143 A JPS6036143 A JP S6036143A JP 58145200 A JP58145200 A JP 58145200A JP 14520083 A JP14520083 A JP 14520083A JP S6036143 A JPS6036143 A JP S6036143A
- Authority
- JP
- Japan
- Prior art keywords
- double
- pipe
- peripheral wall
- double wall
- wall pipe
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/18—Pleated or corrugated hoses
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
- B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
- B29C48/0016—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die using a plurality of extrusion dies
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D24/00—Producing articles with hollow walls
- B29D24/001—Producing articles with hollow walls formed of hollow ridges or ribs, e.g. separate ridges; continuous corrugated structure
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
-
- 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
- B29L2023/18—Pleated or corrugated hoses
- B29L2023/186—Pleated or corrugated hoses having a smooth internal wall
Abstract
Description
【発明の詳細な説明】
本発明は、排水管などに好適に使用される継手部を有し
た二重壁パイプの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a double-walled pipe having a joint portion suitable for use in drainage pipes and the like.
本出願人は、先に実願昭５８−８４１６８号において二
重壁パイプの製造装置を提案し、その中で、円筒状の内
周壁面の外側に連続した凹凸付き外周壁面を形成した二
重壁パイプを製造する方法を開示した。The present applicant previously proposed a double-walled pipe manufacturing apparatus in Utility Application No. 58-84168, in which a double-walled pipe in which a continuous uneven outer peripheral wall surface was formed on the outside of a cylindrical inner peripheral wall surface. A method of manufacturing a wall pipe is disclosed.
Ｌ７かし、この提案に係る装置によって製造された二重
壁パイプを実際に使用する場合には、所定寸法に切断さ
れたパイプ同士を専用のソケットなどを用いて継ぎ足し
て使用するという面倒さを有していた。L7 However, when actually using the double-walled pipe manufactured by the device according to this proposal, it is difficult to use the troublesome method of connecting pipes that have been cut to predetermined dimensions using a special socket or the like. had.
本発明は、このような事情に鑑がみてなされたもので、
押出成形時より継手部を有した二重壁パイプを連続して
製造する方法を提供することを目的としたものである。The present invention was made in view of these circumstances, and
The object of the present invention is to provide a method for continuously manufacturing a double-walled pipe having a joint portion from the time of extrusion molding.
以下、本発明方法について製造装置の一例を例に採って
詳細に説明する。Hereinafter, the method of the present invention will be explained in detail by taking an example of a manufacturing apparatus as an example.
本発明方法を実施するための製造装置の第−例は、第１
図に示すようなものである。The first example of the manufacturing apparatus for carrying out the method of the present invention is
It is as shown in the figure.
即ち、押出成形機工の先部に溶融樹脂を押し出す樹脂押
出部１０を形成してあり、この樹脂押出部１０の側方に
は樹脂押出部１０を外側から包み込むように上下一対が
合致して樹脂の押出方向に連続駆動される断面が半円形
状の一対の外周壁形成用割型２，２が上下に配設されて
いる。That is, a resin extrusion part 10 for extruding molten resin is formed at the tip of the extrusion molding machine, and a pair of upper and lower parts are fitted on the sides of this resin extrusion part 10 so as to wrap around the resin extrusion part 10 from the outside. A pair of outer circumferential wall forming split molds 2, 2 each having a semicircular cross section and continuously driven in the extrusion direction are disposed above and below.
これらの上下の割型２は、いずれも第２図に示すように
、規則正しい環状の凹凸の内周溝２１ａを周設した多数
の凹凸付外周壁成形ブロック２１−と、ピッチ幅の大き
い凹部２２ｂを含んだ凹凸内周溝２２ａを周設した継手
郭成形ブロック２２とをキヤタピラ・チェーン状に回転
自在にエンドレスに連結して形成されており、継手部形
成ブロック２２は、第１図に示すように上下の位置を合
致させて、複数個連結された成形ブロック２工の中に所
定間隔をもって含まれるように配設されている。As shown in FIG. 2, these upper and lower split molds 2 each have a large number of uneven outer peripheral wall molding blocks 21- having a regular annular uneven inner peripheral groove 21a, and a recessed part 22b having a large pitch width. The joint forming block 22 is rotatably connected endlessly in a caterpillar chain shape, and the joint forming block 22 is provided with an uneven inner peripheral groove 22a including a groove 22a.As shown in FIG. The molded blocks are arranged so that the upper and lower positions thereof coincide with each other, and are included at a predetermined interval in a plurality of connected molded blocks.
また、上記樹脂押出部１０には第１の凹段面１１と第２
の凹段面１２とがそれぞれ外周面を切欠して形成しであ
る。第１の凹段面１１はその外側に第１の環状ノズル３
のノズル口を開口し、また内側に圧縮ガス吐出口１３を
開口しており、第２の凹段面１２はその内側に第２の環
状ノズル５のノズル口を開口し、外側にガス抜き口１４
を開口しである。図中１５は膨出部で、第１の凹段面１
１の基部から先端側が側方に開口するよう延設されてお
り、膨出部１５の先端には上記外周壁形成用割型２の内
周溝との間に微小間隙を形成するた封止面１６を形成し
である。Further, the resin extrusion portion 10 has a first concave step surface 11 and a second concave stepped surface 11.
The concave step surfaces 12 are formed by cutting out the outer circumferential surface. The first concave step surface 11 has a first annular nozzle 3 on the outside thereof.
The second concave stepped surface 12 has a nozzle opening of the second annular nozzle 5 opened inside, and a compressed gas discharge opening 13 opened on the inside, and a gas vent opening on the outside. 14
It is open. In the figure, 15 is a bulge, and the first concave stepped surface 1
A sealing member is provided at the distal end of the bulging portion 15 to form a minute gap with the inner circumferential groove of the split mold 2 for forming the outer circumferential wall. A surface 16 is formed.
したがって、この膨出部１５と第１の凹段面１１及び割
型２との間には略密閉な空間１７が形成されることにな
り、二重壁パイプＡの外周壁を形成するために第１の環
状ノズル３から押出された溶融樹脂は、圧縮ガス吐出口
１３から吐出された高圧ガスに押されて割型２の内周溝
に密着状態に（＝Ｊ着されて凹凸段付外周壁４が連続し
て形成される。なお、ガス吐出口１３より吐出されるガ
スとしては、実施例では通常の圧縮エアーを想定してい
るが、溶融樹脂と反応しないものであればその種類は問
わない。Therefore, a substantially sealed space 17 is formed between this bulging portion 15, the first recessed stepped surface 11, and the split mold 2, and is used to form the outer circumferential wall of the double-walled pipe A. The molten resin extruded from the first annular nozzle 3 is pushed by the high-pressure gas discharged from the compressed gas discharge port 13 and is brought into close contact with the inner circumferential groove of the split mold 2 (=J adhered to the uneven stepped outer circumference). The wall 4 is formed continuously.In the embodiment, normal compressed air is assumed as the gas discharged from the gas discharge port 13, but any type of gas may be used as long as it does not react with the molten resin. No question.
次いで、このようにして形成される凹凸段付外周壁４が
割型２の駆動に伴って樹脂の押出方向に送られると、今
度は、第２の環状ノズル５より押出された溶融樹脂が凹
凸段付外周壁４の各凹部内周面に押出されて二重壁パイ
プＡの内周壁６が形成される。Next, when the uneven stepped outer peripheral wall 4 formed in this way is sent in the resin extrusion direction as the split mold 2 is driven, the molten resin extruded from the second annular nozzle 5 becomes uneven. The inner peripheral wall 6 of the double-walled pipe A is formed by being extruded onto the inner peripheral surface of each recess of the stepped outer peripheral wall 4.
樹脂押出部１０の先端部と第２の凹段面１２及び割型２
との間には密閉な空間１日が形成されているが、第２の
環状ノズル５から押出された溶融樹脂が凹凸段付外周壁
４に付着した溶融樹脂の各凹部の内周面に溶着する前に
、この空間１８内の加圧ガスをガス抜き口１４より外部
へ抜き出して空間１８、ずなわち凹凸段付外周壁４の内
面と後述する内周壁６とによって囲まれた空間のガス圧
が減じられる。The tip of the resin extrusion part 10, the second concave stepped surface 12, and the split mold 2
Although a sealed space is formed between the two, the molten resin extruded from the second annular nozzle 5 is welded to the inner peripheral surface of each recess of the molten resin attached to the uneven stepped outer peripheral wall 4. Before this, the pressurized gas in this space 18 is extracted to the outside from the gas vent port 14 to drain the gas in the space 18, that is, the space surrounded by the inner surface of the uneven stepped outer peripheral wall 4 and the inner peripheral wall 6, which will be described later. pressure is reduced.
この空間１８内のガス圧、つまり、溶融状態にある上記
した両樹脂を分離保持しているガス圧が高い場合にはそ
の外周壁４の内周面に付着されるべき内周壁６が間に介
在したガス圧により剥離されやすくなり、逆にこの空間
１８内のガス圧が低ずぎる場合には内周壁６が外周壁４
側に吸引されて凹んだ状態に変形しやず（なるのでこの
ようなガス圧を適切に調整することは重要である。When the gas pressure in this space 18, that is, the gas pressure that separates and holds the above-mentioned two resins in a molten state, is high, the inner peripheral wall 6 to be attached to the inner peripheral surface of the outer peripheral wall 4 is in between. The intervening gas pressure causes the peeling to occur easily, and conversely, if the gas pressure in this space 18 is too low, the inner peripheral wall 6 will peel off from the outer peripheral wall 4.
It is important to properly adjust the gas pressure to prevent it from being sucked to the side and deforming into a concave state.
一方、第２の環状ノズル５の樹脂押出方向側の樹脂押出
部１０の先端には内部に水や空気等の冷媒を循環させた
冷却部７を設けである。On the other hand, a cooling section 7 in which a coolant such as water or air is circulated is provided at the tip of the resin extrusion section 10 on the resin extrusion direction side of the second annular nozzle 5.
この冷却部７は、第３図に示すように、その外径が上記
二重壁パイプＡの内周壁６の内径と略等しく設定された
円筒状に形成されている。As shown in FIG. 3, the cooling section 7 is formed into a cylindrical shape with an outer diameter set approximately equal to the inner diameter of the inner circumferential wall 6 of the double-walled pipe A.
冷却部７の外側には冷却管７１が鯉旋状に巻いζあり、
特に本実施例では冷却管７１は送り管７２と返送管７３
とを交互に配設して形成されている。On the outside of the cooling section 7, there is a cooling pipe 71 wound in a carp spiral shape.
In particular, in this embodiment, the cooling pipe 71 includes a feed pipe 72 and a return pipe 73.
and are arranged alternately.
また、樹脂押出部１０内には二重パイプ１０１が通して
あり、中心側には冷媒の供給管１０２が、外側には冷媒
の排管１０３がそれぞれ設けである。Further, a double pipe 101 is passed through the resin extrusion section 10, and a refrigerant supply pipe 102 is provided on the center side, and a refrigerant exhaust pipe 103 is provided on the outside.
このような構成によれば、供給管１０２から送られて来
た冷媒をまず送り管７２内に送って冷却部７の最先端に
まで送り、次に返送管７３内を通って排管１０３より外
部へ排出することにより、冷印部７内に冷媒を循環させ
て効率良く冷却部７を冷却できる。According to such a configuration, the refrigerant sent from the supply pipe 102 is first sent into the feed pipe 72 and sent to the leading edge of the cooling section 7, and then passes through the return pipe 73 and is sent from the exhaust pipe 103. By discharging the coolant to the outside, the coolant can be circulated within the cold stamp part 7 and the cooling part 7 can be efficiently cooled.
また、上記排管１０３の外側には潤滑剤供給管１０４が
設けてあり、この潤滑剤供給管１０４は断熱材１０５を
排管１０３の外周と樹脂押出部ＩＯの内周との間に間隔
をもって挿填することにより形成されており、上記二重
パイプ１０１を断熱化している。Further, a lubricant supply pipe 104 is provided outside the exhaust pipe 103, and the lubricant supply pipe 104 is provided with a heat insulating material 105 with a space between the outer periphery of the exhaust pipe 103 and the inner periphery of the resin extrusion part IO. It is formed by inserting the double pipe 101 into heat insulation.
潤滑剤供給管１０４内に挿填される潤滑剤８としては、
ステアリン酸、シリコン油等を用いることができ、潤滑
剤供給管１０４内を通って送られて来た潤滑剤８を第２
の環状ノズル５と冷却部７と、の間に形成された潤滑剤
吐出口１０５より吐出して冷却部７と二重壁パイプＡの
内周壁６との間に供給すれば、二重壁パイプＡは、割型
２の駆動により樹脂の押出方向に送られる際に、冷却部
７との間で擦れることなくスムーズに送られ、その際二
重壁パイプＡは冷却部７により内方つまり、内周壁６の
内側より強制的に冷却されて保形される。The lubricant 8 inserted into the lubricant supply pipe 104 includes:
Stearic acid, silicone oil, etc. can be used, and the lubricant 8 sent through the lubricant supply pipe 104 is
If the lubricant is discharged from the annular nozzle 5 and the cooling part 7, and is supplied between the cooling part 7 and the inner circumferential wall 6 of the double-walled pipe A, the double-walled pipe When pipe A is sent in the extrusion direction of the resin by driving the split mold 2, it is sent smoothly without rubbing against the cooling part 7, and at this time, the double wall pipe A is inwardly clogged by the cooling part 7. It is forcibly cooled from the inside of the inner circumferential wall 6 to maintain its shape.
かくして冷却された二重壁パイプＡは、上下一対の割型
２の駆動に伴い外部に送出される。The thus cooled double-walled pipe A is sent out to the outside as the pair of upper and lower split molds 2 are driven.
このように、本発明方法によれば、第１の環状ノズル３
から押出された溶融樹脂で二重壁パイプＡの凹凸段付外
周壁４を形成し、第２の環状ノズル５から押出された溶
融樹脂で二重壁パイプＡの内周壁６を形成することにな
り、得られる二重壁パイプＡの外周壁４は第４図＜ａ＞
に示ずように、ピッチ幅の大きい凸部４２を所定間隔毎
に含む凹凸面４１を有した形状となる。Thus, according to the method of the present invention, the first annular nozzle 3
The molten resin extruded from the second annular nozzle 5 forms the stepped outer peripheral wall 4 of the double-walled pipe A, and the molten resin extruded from the second annular nozzle 5 forms the inner peripheral wall 6 of the double-walled pipe A. The outer peripheral wall 4 of the double-walled pipe A obtained is shown in FIG. 4<a>.
As shown in , the shape has an uneven surface 41 including convex portions 42 having a large pitch width at predetermined intervals.
したがって、このようにして製造された二重壁パイプＡ
をピッチ幅の大きい一条の凸部４２を含む面、例えば第
４図（ａ）に示すｘ −ｘ’線で切断し、さらにこの切
断した凸部４２の内方に囲まれた内周壁６Ｉを第４ Ｔ
Ｉ！Ｊ（ｂ ） ニ示ｔ Ｙ ＹＩＭニ沿ッて切除すれ
ば、この内周壁６１の切除された一条の凸部４２−・一
部分は、第４図（Ｃ）に示すようにいずれも外周壁４よ
り径大な開口を有した継手部４３となって、最後に継手
部を有した二重壁パイプＢが得られる。Therefore, the double-walled pipe A produced in this way
is cut along a plane including a single convex portion 42 with a large pitch width, for example, along the line x-x' shown in FIG. 4th T
I! If the cut is made along the direction shown in FIG. A joint portion 43 having a larger diameter opening is obtained, and finally a double-walled pipe B having a joint portion is obtained.
かくして得られた二重壁パイプＢは、その継手部４３内
に他の同様な二重壁パイプＢの一端を第５図に示すよう
に挿嵌し、必要に応じて接着剤などを介して連結して使
用される。The thus obtained double-walled pipe B has one end of another similar double-walled pipe B inserted into the joint part 43 as shown in FIG. used in conjunction.
なお、このようにして製造された継手部を有した二重壁
パイプＢの凹凸段付外周壁４の継手部４３の内周面に第
６図に示すような係合突起４３ａを適宜間隔を保持して
突設しておけば、パイプ同士Ｂ、Ｂが挿嵌接続された後
は、挿嵌された方のパイプＢの凹凸面４１の凸部が、こ
れら突起４２ａと弾性係合してその抜は止めを防止でき
る効果もある。Furthermore, on the inner peripheral surface of the joint part 43 of the uneven stepped outer peripheral wall 4 of the double wall pipe B having the joint part manufactured in this way, engaging protrusions 43a as shown in FIG. 6 are provided at appropriate intervals. If the pipes are held and protruded, after the pipes B and B are inserted and connected, the projections of the uneven surface 41 of the inserted pipe B will elastically engage with these protrusions 42a. It also has the effect of preventing it from being removed.
この第６図に示ずような係合突起４３ａを継手部４３に
形成した二重壁パイプＢは、凹凸部の継手部を形成する
ことになる外周壁形成割型２の内周溝に形成されたピン
チ幅の大きい凹部２２ｂに、係合突起４３ａの形状に対
応した凸部（不図示）を形成すれば容易に得られるもの
である。The double-walled pipe B in which the engaging protrusion 43a as shown in FIG. This can be easily achieved by forming a convex portion (not shown) corresponding to the shape of the engaging protrusion 43a in the concave portion 22b having a large pinch width.
本発明方法を実施するにあたって、以上に詳述した製造
装置を用いれば、押出成形直後の熱くて変形し易い二重
壁パイプＡを、樹脂押出部１０の先端に設けられた内部
に冷媒を循環させた冷却部７を通じて、その内方より強
制的に冷却できるので、効率良く冷却して保形すること
ができ、しかも、押出成形直後に潤滑剤吐出口１０５か
ら冷却部７と内周壁６との間に供給された潤滑剤８で、
二重壁パイプＡを割型２，２の駆動に伴って冷却部７の
外周にスムーズに移動させることができるので割型２，
２の駆動速度を速くしても二重壁パイプＡが製造直後に
熱で変形するということがなく、二重壁パイプＡの生産
性を著しく向上できる利点がある。In carrying out the method of the present invention, if the manufacturing apparatus described in detail above is used, a refrigerant is circulated inside the double-walled pipe A, which is hot and easily deformed immediately after extrusion molding, provided at the tip of the resin extrusion section 10. Since cooling can be forcibly performed from the inside through the cooling part 7, it is possible to efficiently cool and maintain the shape.Moreover, immediately after extrusion, the cooling part 7 and the inner peripheral wall 6 can be cooled from the lubricant outlet 105. With the lubricant 8 supplied during
The double wall pipe A can be smoothly moved to the outer periphery of the cooling section 7 as the split molds 2, 2 are driven.
Even if the driving speed of 2 is increased, the double-walled pipe A will not be deformed by heat immediately after production, and there is an advantage that the productivity of the double-walled pipe A can be significantly improved.
なお、本発明方法は、前述した第１図に示した装置以外
にも、実施゛可能なもので、その−例としては、冷却部
７の構成を省略した第７図に示すものがあげられる。It should be noted that the method of the present invention can be implemented in devices other than the device shown in FIG. 1 described above, such as the device shown in FIG. .
すなわち、このものは、第１．第２の環状ノズル３．５
を有した樹脂押出部１０を有しており、第１の環状ノズ
ル３は、第１図に示す本発明装置と同様に、凹凸内周面
を形成した成形ブロック２１．２２を上下に配設して、
各々をエンドレスに連結させた外周壁形成用割型２によ
って、外側から包み込むように配設されており、これら
上下に配設された凹凸内周面を有した形成ブロック２１
の中には、継手部を形成するためにピッチ幅の大きい凹
部２２ｂを形成した凹凸内周溝２２８を周設した継手部
形成ブロック２２が所定間隔をもって上下の一対が合致
するように配設されている。That is, this one is the first one. Second annular nozzle 3.5
The first annular nozzle 3 has molded blocks 21 and 22 each having an uneven inner peripheral surface disposed above and below, similar to the apparatus of the present invention shown in FIG. do,
A forming block 21 is arranged so as to be wrapped from the outside by outer peripheral wall forming split molds 2 which are connected to each other endlessly, and has an uneven inner peripheral surface arranged above and below.
Inside, a joint forming block 22 having a concave and convex inner circumferential groove 228 in which a recess 22b with a large pitch width is formed in order to form a joint is disposed so that the upper and lower pairs coincide with each other at a predetermined interval. ing.
なお、この装置において、ａは、押出成形部】０の先端
部に形成された空洞部す内に芯棒Ｃを介してガス供給管
ｄの先端に形成した密閉栓であり、二重壁パイプＡは、
割型２、密閉栓ａ、及び加圧ガスなどで冷却され、割型
２の駆動に伴って密閉栓ａと割型２との隙間より連続し
て外部に取出されるような構成になっている。In this device, a is a sealing plug formed at the tip of the gas supply pipe d via a core rod C in a cavity formed at the tip of the extrusion molded part 0, and is a double-walled pipe. A is
It is configured such that it is cooled by the split mold 2, the sealing plug a, pressurized gas, etc., and is continuously taken out from the gap between the sealing plug a and the split mold 2 as the split mold 2 is driven. There is.
この装置のその他の部分で第１図に示す装置のものと同
一の対応部分の説明については、同一の符号を付してそ
の説明を省略している。Other parts of this apparatus that correspond to the same parts as those of the apparatus shown in FIG. 1 are given the same reference numerals, and the description thereof is omitted.
以上に詳述したように、本発明方法によれば、継手部を
有した二重壁パイプを押出成形を用いて連続して効率良
く量産できるものである。As detailed above, according to the method of the present invention, double-walled pipes having joints can be continuously and efficiently mass-produced using extrusion molding.
第１図は、本発明方法を実施するための装置の一例を示
す縦断面図、
第２図は、外周壁形成用割型の詳細を示す図、第３図は
、同上の装置の樹脂押出部の構造を示す横断面図、
第４図は、本発明方法による二重壁パイプの製造工程を
示す図、
第５図は、本発明方法によって製造された継手部を有し
た二重壁パイプの一実施例図で、その連結状態を示す図
、
第６図は、同上の二重壁パイプの他の実施例図で、その
連結状態を示す図、
第７図は、本発明方法を実施する装置の他側を示す縦断
面図である。
（符号の説明）
２は外周壁形成用割型、３は第１の環状ノズル５は第２
の環状ノズルであり、
Ａは押出成形によって連続して形成された二重壁パイプ
、Ｂは本発明方法によって製造された継手部を有する二
重壁パイプ、４はその凹凸段付外周壁、４３はその継手
部、６は内周壁である。
特許出願人 タキロン株式会社
代表者 八木 隆太部FIG. 1 is a longitudinal sectional view showing an example of an apparatus for implementing the method of the present invention, FIG. 2 is a view showing details of a split mold for forming an outer peripheral wall, and FIG. 3 is a resin extrusion diagram of the same apparatus. Figure 4 is a diagram showing the manufacturing process of a double wall pipe by the method of the present invention; Figure 5 is a double wall pipe with a joint part manufactured by the method of the present invention. FIG. 6 is a diagram showing another embodiment of the same double-walled pipe, showing its connected state; FIG. 7 is a diagram showing the connected state of the same double-walled pipe; FIG. FIG. 3 is a vertical sectional view showing the other side of the device. (Explanation of symbols) 2 is a split mold for forming an outer peripheral wall, 3 is a first annular nozzle 5 is a second mold
4 is an annular nozzle, A is a double wall pipe continuously formed by extrusion molding, B is a double wall pipe having a joint part manufactured by the method of the present invention, 4 is an uneven stepped outer peripheral wall thereof, 43 6 is the joint portion thereof, and 6 is the inner circumferential wall. Patent applicant: Ryutabe Yagi, representative of Takiron Co., Ltd.
Claims (1)
チ幅の大きい凹部を所定間隔毎に含む凹凸内周溝を周設
した断面半円形状のエンドレスな外周壁形成用割型の内
周溝に密着状態に付着させ、さらに第２の環状ノズルよ
り押出した溶融樹脂を上記外周壁形成用割型に付着させ
た溶融樹脂に内方より溶着させて、ピッチ幅の大きい一
条の凸部を所定間隔毎に形成した凹凸段付外周壁の各凹
部の内周面に円筒状の内周壁を溶着させた二重壁パイプ
を連続して形成し、 しかる後に、上記連続した二重壁パイプを、上記ピッチ
幅の大きい一条の凸部を含む面で切断し、この凸部に囲
まれた内周壁を切除して継手部を有した二重壁パイプを
製造する方法。(1) The molten resin extruded from the first annular nozzle is applied to the inner periphery of a split mold for forming an endless outer peripheral wall with a semicircular cross section, which is provided with uneven inner peripheral grooves including concave portions with a large pitch width at predetermined intervals. The molten resin is adhered tightly to the groove, and the molten resin extruded from the second annular nozzle is welded from the inside to the molten resin adhered to the split mold for forming the outer peripheral wall to form a single convex portion with a large pitch width. Continuously form a double-walled pipe in which a cylindrical inner peripheral wall is welded to the inner peripheral surface of each concave portion of the stepped outer peripheral wall with unevenness formed at predetermined intervals, and then the continuous double-walled pipe is A method of manufacturing a double-walled pipe having a joint portion by cutting along a plane including a single convex portion having a large pitch width and cutting off an inner circumferential wall surrounded by the convex portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58145200A JPS6036143A (en) | 1983-08-08 | 1983-08-08 | Manufacture of double wall pipe with joint section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58145200A JPS6036143A (en) | 1983-08-08 | 1983-08-08 | Manufacture of double wall pipe with joint section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6036143A true JPS6036143A (en) | 1985-02-25 |
| JPS636348B2 JPS636348B2 (en) | 1988-02-09 |
Family
ID=15379723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58145200A Granted JPS6036143A (en) | 1983-08-08 | 1983-08-08 | Manufacture of double wall pipe with joint section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6036143A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3513708A1 (en) | 1985-04-12 | 1986-10-16 | Rainer Isolierrohrfabrik Max Drossbach, 8852 Rain | METHOD AND DEVICE FOR PRODUCING DOUBLE-WALLED TUBES |
| JPH02122513U (en) * | 1989-03-14 | 1990-10-08 | ||
| EP0600214A1 (en) * | 1992-12-01 | 1994-06-08 | Wilhelm Hegler | Method and apparatus for the continuous manufacturing of a composite pipe having a substantially smooth external wall portion |
| CN104385545A (en) * | 2014-10-15 | 2015-03-04 | 北京化工大学 | Making apparatus of phase changing and temperature adjusting plastic and wood laminated composite board |
-
1983
- 1983-08-08 JP JP58145200A patent/JPS6036143A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3513708A1 (en) | 1985-04-12 | 1986-10-16 | Rainer Isolierrohrfabrik Max Drossbach, 8852 Rain | METHOD AND DEVICE FOR PRODUCING DOUBLE-WALLED TUBES |
| JPH02122513U (en) * | 1989-03-14 | 1990-10-08 | ||
| JPH055792Y2 (en) * | 1989-03-14 | 1993-02-16 | ||
| EP0600214A1 (en) * | 1992-12-01 | 1994-06-08 | Wilhelm Hegler | Method and apparatus for the continuous manufacturing of a composite pipe having a substantially smooth external wall portion |
| CN104385545A (en) * | 2014-10-15 | 2015-03-04 | 北京化工大学 | Making apparatus of phase changing and temperature adjusting plastic and wood laminated composite board |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636348B2 (en) | 1988-02-09 |
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