JPH01221219A - Molding method and device of screwed uneven pipe - Google Patents
Molding method and device of screwed uneven pipeInfo
- Publication number
- JPH01221219A JPH01221219A JP63048280A JP4828088A JPH01221219A JP H01221219 A JPH01221219 A JP H01221219A JP 63048280 A JP63048280 A JP 63048280A JP 4828088 A JP4828088 A JP 4828088A JP H01221219 A JPH01221219 A JP H01221219A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- spiral
- synthetic resin
- resin material
- convex
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 27
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 25
- 239000000057 synthetic resin Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 210000002445 nipple Anatomy 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection 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
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
-
- 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
-
- 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
- B29C48/03—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
- B29C48/16—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
- 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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、螺旋状凹凸管の成形方法および装置に関する
。さらに詳しくは、成形される管強度。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for forming a spiral concavo-convex tube. More specifically, the strength of the formed tube.
成形コスト等に係る螺旋状凹凸管の成形手段の改良に関
する。This invention relates to improvements in forming means for spiral concavo-convex tubes in terms of forming costs and the like.
［従来の技術］
従来、螺旋状凹凸管の成形手段としては、例えばテープ
状の基部の中央部の長さ方向へ突起部を沿設したものを
一部重ね合せるように螺旋状に捲回して接着することが
知られている。[Prior Art] Conventionally, as a method for forming a spiral concave-convex tube, for example, a tape-shaped base part with a protrusion extending along the length of the central part is wound in a spiral shape so as to partially overlap. known to adhere.
［発明が解決しようとりる課題］
前述の従来の螺旋状凹凸管の成形手段では、テープ状の
基部の中央部の長さ方向へ突起部を沿設する工程と、こ
れを一部重ね合せるように螺旋状に捲回して接着する工
程とを必要とし、成形に手間とコストが掛るという問題
点を有している。また、一部重ね合せるように螺旋状に
捲回して接着する構造であるために、剥離等が起こりや
すく高い強度が期待できないという問題点を有している
。[Problems to be Solved by the Invention] The above-mentioned conventional means for forming a spiral concavo-convex tube includes a process of providing a protrusion along the length of the central part of a tape-shaped base, and a process of partially overlapping the protrusion. This method requires steps of spirally winding and gluing, and has the problem that molding is laborious and costly. In addition, since the structure is such that it is wound spirally and bonded so as to partially overlap, there is a problem that peeling is likely to occur and high strength cannot be expected.
本発明はこのような問題点を解決するためになされたも
のであり、その目的は、容易かつ低コストで高い強度の
螺旋状凹凸管の成形が可能な成形方法および成形装置を
提供することにある。The present invention has been made to solve these problems, and its purpose is to provide a molding method and a molding device that can easily mold a high-strength spiral concavo-convex tube at low cost. be.
［課題を解決するための手段］
前述の目的を達成するため、本発明に係る螺旋状凹凸管
の成形方法および装置は、次のような手段を採用する。[Means for Solving the Problems] In order to achieve the above-mentioned object, the method and apparatus for forming a spiral concavo-convex tube according to the present invention employs the following means.
即ち、請求項１では成形方法に係り、筒状に押出された
溶融状態の合成樹脂材の外周面に対し、内周面に螺旋状
の凹凸成形溝を有するロータリダイを回転させながら吸
引当接させて冷却固化し、筒状の合成樹脂材に螺旋状の
凹凸形状を成形することを特徴とする。That is, claim 1 relates to a molding method, in which a rotary die having spiral grooves on the inner circumferential surface is brought into suction contact with the outer circumferential surface of a molten synthetic resin material extruded into a cylindrical shape while rotating. It is characterized in that it is cooled and solidified to form a spiral uneven shape into a cylindrical synthetic resin material.
また、請求項２では成形方法に係り、請求項１の螺旋状
凹凸管の成形方法において、螺旋状の凹凸形状が成形さ
れた筒状の合成樹脂材をアウタチューブとし、ロータリ
ダイの出口端付近でインナチューブをアウタチューブと
の間にエアを送気しながらアウタチューブの内周面に溶
着することを特徴とする。Claim 2 relates to a molding method, and in the method for molding a spiral concavo-convex tube according to claim 1, a cylindrical synthetic resin material formed with a spiral concavo-convex shape is used as an outer tube, and the outer tube is near the outlet end of the rotary die. The inner tube is welded to the inner peripheral surface of the outer tube while supplying air between the inner tube and the outer tube.
また、請求項３では成形装置に係り、溶融状態の合成樹
脂材を筒状に押出す押出し部と、押出し部の出口端側に
回転可能に設けられ押出された合成樹脂を固化するロー
タリダイとからなり、ロータリダイは、その内周面にバ
キューム路が連通した螺旋状の凹凸成形溝を有し、その
周囲に冷却部を有してなる。Claim 3 also relates to a molding device, and includes an extrusion section that extrudes a molten synthetic resin material into a cylindrical shape, and a rotary die that is rotatably provided on the exit end side of the extrusion section and solidifies the extruded synthetic resin. The rotary die has a spiral concavo-convex molded groove with a vacuum passage communicating with it on its inner circumferential surface, and has a cooling section around the spiral groove.
また、請求項４では成形装置に係り、請求項３の螺旋状
凹凸管の成形装置において、ロータリダイの出口端付近
に、押出し部から押出された合成樹脂材をアウタチュー
ブとしてその内周面にインナチューブを溶着する二次押
出し部を設けてなり、この二次押出し部にはアウタチュ
ーブ、インナチューブの間にエアを送気する送気路を備
えたことを特徴とする。A fourth aspect of the present invention relates to a forming apparatus, and in the forming apparatus of a spiral concavo-convex tube according to the third aspect, the synthetic resin material extruded from the extrusion part is formed into an outer tube near the outlet end of the rotary die and formed on the inner circumferential surface thereof. A secondary extrusion part is provided for welding the inner tube, and the secondary extrusion part is provided with an air supply path for supplying air between the outer tube and the inner tube.
［作 用１
前述の請求項１．請求項３の手段によると、溶融状態で
筒状に押出された合成樹脂材が固化するのと同時に凹凸
形状が成形されるため、容易かつ低コストでの成形を可
能にするという目的が達成されることになる。さらに、
凹凸形状が筒状の合成樹脂材に接着等ではなく一体的に
成形されるため、高い強度に成形することを可能にする
という目的が達成されることになる。[Function 1 The above-mentioned claim 1. According to the means of claim 3, the concavo-convex shape is molded at the same time as the synthetic resin material extruded into a cylindrical shape in a molten state solidifies, so that the object of enabling easy and low-cost molding is achieved. That will happen. moreover,
Since the uneven shape is integrally molded onto the cylindrical synthetic resin material rather than by adhesion, the purpose of making it possible to mold with high strength is achieved.
また、請求項２．請求項４の手段によると、インナチュ
ーブを内装させるため、さらに高い強度が得られ高い強
度に成形することを可能にするという目的達成をより確
実にする。さらに、インナチューブの内装を凹凸形状の
アウタチューブと同時に成形するため、容易かつ低コス
トでの成形を可能にするという目的達成を阻害すること
にはならない。さらにまた、アウタチューブ、インナチ
ューブの間にエアを送気することで、形成された凹凸形
状が崩れるのを防止する。Also, claim 2. According to the means of claim 4, since the inner tube is installed internally, even higher strength can be obtained, and the objective of making it possible to mold to a higher strength is more reliably achieved. Furthermore, since the interior of the inner tube is molded at the same time as the uneven outer tube, this does not impede the achievement of the objective of enabling easy and low-cost molding. Furthermore, by supplying air between the outer tube and the inner tube, the formed uneven shape is prevented from collapsing.
［実施例］
以下、本発明に係る螺旋状凹凸管の成形方法および装置
の実施例を図面に基づいて説明する。[Example] Hereinafter, an example of the method and apparatus for forming a spiral concavo-convex tube according to the present invention will be described based on the drawings.
この実施例は、請求項２．請求項４に対応するものであ
る。This embodiment is defined in claim 2. This corresponds to claim 4.
この実施例では、押出し部１は円筒状のニップル１１に
押出し路１３を介して円筒状のダイ１２が１■合された
構成からなり、ニップル１１はダイ１２よりも突出した
長さを有しこの突出した部分で二次押出し部２を構成し
ている。In this embodiment, the extrusion section 1 has a configuration in which a cylindrical die 12 is fitted to a cylindrical nipple 11 via an extrusion path 13, and the nipple 11 has a length that protrudes beyond the die 12. This protruding portion constitutes the secondary extrusion portion 2.
ニップル１１は、ダイ１２から突出した部分のダイ１２
寄の部分に凹部１１ａを有し、ざらに凹部１１ａの突出
側に元の径に復した先端部１１ｂを有している。The nipple 11 is a part of the die 12 that protrudes from the die 12.
It has a concave portion 11a at the closer portion, and has a tip portion 11b that has returned to its original diameter roughly on the protruding side of the concave portion 11a.
このようなニップル１１の軸方向の全長へは中央孔１１
Ｃが開孔されており、この中央孔１１Ｇの内部にはオイ
ルポンプ（図示せず）に接続したオイル管１１ｄが配設
され、またこの中央孔１１ｃは送気路１１ｅで前記凹部
１１ａに連通している。また、ニップル１１の中央孔１
１Ｇ周りには同心円状の二次押出し路１１ｆが前記凹部
１１ａ、前記先端部１１ｂの境目まで開孔されている。The entire length of the nipple 11 in the axial direction has a central hole 11.
An oil pipe 11d connected to an oil pump (not shown) is disposed inside this central hole 11G, and this central hole 11c communicates with the recess 11a through an air supply path 11e. are doing. In addition, the center hole 1 of the nipple 11
A concentric secondary extrusion path 11f is opened around 1G to the boundary between the recess 11a and the tip 11b.
なお、前記中央孔１１Ｃにはエアポンプ（図示せず）が
接続されており、また前記オイル管１１ｄは前記先端部
１１ｂの外周面に連通ずるオイル路１１ｇに接続されて
いる。An air pump (not shown) is connected to the central hole 11C, and the oil pipe 11d is connected to an oil path 11g communicating with the outer peripheral surface of the tip 11b.
このようなニップル１１において、ダイ１２から突出し
た各部１１ａ、１１ｂ、１１ｃ、１１ｄ、１１ｅ、１１
ｆ。In such a nipple 11, each part 11a, 11b, 11c, 11d, 11e, 11 protruding from the die 12
f.
１１ｑによって二次押出し部２が構成される。The secondary extrusion section 2 is configured by 11q.
ダイ１２は押出し側の端部に小径部１２ａを有しており
、この小径部１２ａにはベアリング３を介してロータリ
ダイ４を回転可能に支持している。また、この小径部１
２ａには、オイルポンプ（図示せず）に接続したオイル
路１２ｂが連通している。The die 12 has a small diameter portion 12a at the end on the extrusion side, and a rotary die 4 is rotatably supported on the small diameter portion 12a via a bearing 3. In addition, this small diameter portion 1
2a communicates with an oil passage 12b connected to an oil pump (not shown).
ダイ１２に支持されているロータリダイ４は、その外周
面にプーリ４１が設けられて回転駆動されるようになっ
ており、その内周面には前記ベアリング３が接する部分
からダイ１２どの間にオイル路５を形成する外に波形か
らなる螺旋状の凹凸成形溝４２が設けられている。この
凹凸成形溝４２は前記ニップル１１の凹部１１ａと対面
しており、これ等の間にエア室６が形成されている。ま
た、この凹凸成形溝４１には、バキュームポンプ（図示
せず）に接続したバキューム路４３が連通している。さ
らに、この凹凸成形溝４１に対応するロータリダイ４の
外側には、注水路４４を有する冷却部４５が嵌合されて
いる。この冷却部４５は、他の冷却手段を採用すること
も可能である。The rotary die 4 supported by the die 12 is rotatably driven by a pulley 41 provided on its outer circumferential surface, and the rotary die 4 has a pulley 41 provided on its outer circumferential surface to be rotatably driven. A corrugated spiral groove 42 is provided outside the oil passage 5 . The uneven groove 42 faces the recess 11a of the nipple 11, and the air chamber 6 is formed between them. Further, a vacuum path 43 connected to a vacuum pump (not shown) is communicated with the uneven groove 41. Further, a cooling part 45 having an injection channel 44 is fitted on the outside of the rotary die 4 corresponding to the groove 41 . This cooling unit 45 may also employ other cooling means.
このような実施例によると、前記押出し路１３から溶融
状態の合成樹脂材Ａを筒状に押出すと、前記凹部１１ａ
に連通する送気路１１ｅからエア室６に送気されるエア
圧（大気圧）と凹凸成形溝４２に連通ずるバキューム路
４３から吸引されるエア圧（負圧）とにより、合成樹脂
材Ａはロータリダイ４の凹凸成形溝４２に吸引当接し波
形の凹凸形状Ａ′が形成される。この凹凸形状Ａ′はロ
ータリダイ４の回転によって螺旋状に形成されることに
なる。According to this embodiment, when the molten synthetic resin material A is extruded into a cylindrical shape from the extrusion path 13, the recess 11a
The synthetic resin material A is brought into suction contact with the concavo-convex forming groove 42 of the rotary die 4, and a wavy concavo-convex shape A' is formed. This uneven shape A' is formed in a spiral shape by the rotation of the rotary die 4.
そして、この螺旋状の凹凸形状Ａ′は、前記冷却部４５
によって固化されることになる。This spiral uneven shape A' is formed by the cooling part 45.
It will be solidified by
一方、固化される螺旋状の凹凸形状Ａ′に対しては、螺
旋状の凹凸形状Ａ′をアウタチューブとして、二次押出
し部２の二次押出し路１１ｆからさらに溶融状態の合成
樹脂材Ｂが押出されインナチューブが溶着して内装され
成形が補強される。そして、アウタチューブ、インナチ
ューブはニップル１１の先端部１１ｂに沿って押出され
固化成形されることになる。即ち、一連の押出しの流れ
において成形が行われることになる。On the other hand, for the spiral concave-convex shape A' to be solidified, the molten synthetic resin material B is further fed from the secondary extrusion path 11f of the secondary extrusion section 2 using the spiral concave-convex shape A' as an outer tube. The extruded inner tube is welded and installed inside to reinforce the molding. Then, the outer tube and the inner tube are extruded along the tip 11b of the nipple 11 and solidified. That is, molding is performed in a series of extrusion flows.
なお、前記四部１１ａに連通する送気路１１ｅからエア
室６に送気されるエア圧により、インナナ１−ブがアウ
タチューブに吸着したりアウタチューブの凹凸形状Ａ′
が変形してしまうことはない。Note that due to the air pressure supplied to the air chamber 6 from the air supply path 11e communicating with the four parts 11a, the inner tube may be attracted to the outer tube or the uneven shape A' of the outer tube may be caused.
will not be deformed.
また、前記中央孔１１ｃの端部から吐出するエアは、ア
ウタチューブ、インナチューブを内側から加圧し筒状に
保形するのに寄与する。さらに、前記オイル路ｉ１ｇ、
１２ｂ、５は、合成樹脂材料Ａ、Ｂと各部との潤滑とな
り押出しを容易にするものである。Furthermore, the air discharged from the end of the central hole 11c contributes to pressurizing the outer tube and the inner tube from the inside and maintaining their cylindrical shape. Furthermore, the oil path i1g,
12b and 5 lubricate the synthetic resin materials A and B and each part to facilitate extrusion.
以上、図示した実施例の外に、請求項１．請求項３に対
応する実施例としては、二次押出し部２に相当する部分
を除即すれば該当することになる。In addition to the illustrated embodiments, claim 1. As an embodiment corresponding to claim 3, if a portion corresponding to the secondary extrusion section 2 is removed, the embodiment corresponds to claim 3.
また、凹凸形状Ａ′は、前述のような波形に限らず第３
図、第４図に示すような角形とすることも可能であり、
ロータリダイ４（凹凸成形溝４２）を交換すれば容易に
行い得る。In addition, the uneven shape A' is not limited to the waveform as described above.
It is also possible to have a rectangular shape as shown in Fig. 4.
This can be easily done by replacing the rotary die 4 (the uneven molding groove 42).
［発明の効果］
以上のように本発明に係る螺旋状凹凸管の成形方法およ
び装置は、請求項１．請求項２．請求項３、請求項４共
通として、溶融状態で筒状に押出された合成樹脂材が固
化するのと同時に凹凸形状が成形されるため、容易かつ
低コストでの成形が可能になり、さらに凹凸形状が筒状
の合成樹脂材に接着等ではなく一体的に成形されるため
、高い強度に成形することが可能となる効果がある。さ
らに、捲回等の加圧手段を採らないため、管の径の精度
を高めることができる効果がある。さらに、ロータリダ
イ（凹凸成形溝）を交換することで、自在な凹凸形状を
成形することができる効果がある。[Effects of the Invention] As described above, the method and apparatus for forming a spiral concavo-convex tube according to the present invention is provided in claim 1. Claim 2. Common to claims 3 and 4, since the synthetic resin material extruded into a cylindrical shape in a molten state is molded into an uneven shape at the same time as it solidifies, it is possible to mold easily and at low cost. Since it is molded integrally with the cylindrical synthetic resin material rather than by adhesion, it has the effect of being able to be molded with high strength. Furthermore, since no pressure means such as winding is required, the accuracy of the diameter of the tube can be improved. Furthermore, by replacing the rotary die (grooves and grooves), it is possible to form any desired uneven shape.
また、請求項２．請求４のみに共通として、インナチュ
ーブの内装により成形強度をさらに高めることができる
効果がある。Also, claim 2. Common only to claim 4, there is an effect that the molding strength can be further increased by the interior of the inner tube.
また、請求項４のみとして、二次押出し部を改良すれば
、三層構造以上の凹凸管を成形することも可能となる効
果がある。Further, as only claim 4, if the secondary extrusion section is improved, it is possible to form a concavo-convex tube having a three-layer structure or more.
第１図は本発明に係る螺旋状凹凸管の成形方法および装
置の実施例を示寸断面図、第２図は第１図のｘ−Ｘ線断
面図、第３図、第４図は夫々本発明に係る螺旋状凹凸管
の成形方法および装置によって製造される螺旋状凹凸管
の構造例を示す断面図である。
１・・・押出し部 １１ｅ・・・送気路２・・・
二次押出し部 ４・・・ロータリダイ４２・・・凹凸
成形溝 ４３・・・バキューム路４５・・・冷却部
特許出願人 株式会社トヨックスFig. 1 is a sectional view showing an embodiment of the method and apparatus for forming a spiral concavo-convex tube according to the present invention, Fig. 2 is a sectional view taken along the line XX of Fig. 1, and Figs. 3 and 4 are respectively 1 is a cross-sectional view showing an example of the structure of a spiral concavo-convex tube manufactured by the method and apparatus for forming a concave-convex helical tube according to the present invention. 1... Extrusion part 11e... Air supply path 2...
Secondary extrusion section 4...Rotary die 42...Concave and convex molding groove 43...Vacuum path 45...Cooling section Patent applicant TOYOX Co., Ltd.
Claims (1)
対し、内周面に螺旋状の凹凸成形溝を有するロータリダ
イを回転させながら吸引当接させて冷却固化し、筒状の
合成樹脂材に螺旋状の凹凸形状を成形することを特徴と
する螺旋状凹凸管の成形方法。 ２、請求項１の螺旋状凹凸管の成形方法において、螺旋
状の凹凸形状が成形された筒状の合成樹脂材をアウタチ
ューブとし、ロータリダイの出口端付近でインナチュー
ブをアウタチューブとの間にエアを送気しながらアウタ
チューブの内周面に溶着することを特徴とする螺旋状凹
凸管の成形方法。 ３、溶融状態の合成樹脂材を筒状に押出す押出し部と、
押出し部の出口端側に回転可能に設けられ押出された合
成樹脂を固化するロータリダイとからなり、ロータリダ
イは、その内周面にバキューム路が連通した螺旋状の凹
凸成形溝を有し、その周囲に冷却部を有してなる螺旋状
凹凸管の成形装置。 ４、請求項３の螺旋状凹凸管の成形装置において、ロー
タリダイの出口端付近に、押出し部から押出された合成
樹脂材をアウタチューブとしてその内周面にインナチュ
ーブを溶着する二次押出し部を設けてなり、この二次押
出し部にはアウタチューブ、インナチューブの間にエア
を送気する送気路を備えたことを特徴とする螺旋状凹凸
管の成形装置。[Claims] 1. A rotary die having spiral grooves formed on the inner circumferential surface is brought into suction contact with the outer circumferential surface of a molten synthetic resin material extruded into a cylindrical shape while rotating to cool it. A method for forming a spiral concave-convex tube, which is characterized by solidifying and molding a spiral concave-convex shape into a cylindrical synthetic resin material. 2. In the method for forming a spiral concavo-convex tube according to claim 1, the outer tube is a cylindrical synthetic resin material formed with a helical concavo-convex shape, and the inner tube is disposed between the inner tube and the outer tube near the outlet end of the rotary die. A method for forming a spiral concavo-convex tube, which is characterized by welding it to the inner peripheral surface of an outer tube while supplying air to the outer tube. 3. An extrusion unit that extrudes a molten synthetic resin material into a cylindrical shape;
It consists of a rotary die that is rotatably provided on the exit end side of the extrusion part and solidifies the extruded synthetic resin, and the rotary die has a spiral groove formed with concave and convex grooves with a vacuum passage communicating with the inner circumferential surface thereof, A device for forming a spiral concavo-convex tube having a cooling section around it. 4. In the spiral uneven tube forming apparatus according to claim 3, a secondary extrusion section is provided near the outlet end of the rotary die, in which the synthetic resin material extruded from the extrusion section is used as an outer tube and an inner tube is welded to the inner circumferential surface of the outer tube. 1. A device for forming a spiral concavo-convex tube, characterized in that the secondary extrusion section is provided with an air supply path for supplying air between the outer tube and the inner tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63048280A JPH01221219A (en) | 1988-02-29 | 1988-02-29 | Molding method and device of screwed uneven pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63048280A JPH01221219A (en) | 1988-02-29 | 1988-02-29 | Molding method and device of screwed uneven pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01221219A true JPH01221219A (en) | 1989-09-04 |
Family
ID=12799022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63048280A Pending JPH01221219A (en) | 1988-02-29 | 1988-02-29 | Molding method and device of screwed uneven pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01221219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997022457A1 (en) * | 1995-12-19 | 1997-06-26 | E.I. Du Pont De Nemours And Company | Apparatus for shaping and cooling corrugated plastic pipes |
| KR100865863B1 (en) * | 2007-01-26 | 2008-11-03 | 김중돈 | manufacturing method of vacuum packing film and vacuum packing fil maunfacturing device |
| EP3311977A1 (en) * | 2016-10-18 | 2018-04-25 | Canlar Boru Profil Plastik Elekt.Ins.Mak.Nak.San. Ve Tic.Ltd.Sti. | Plastic pipe machine mandrel cooling and lubricating assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780028A (en) * | 1980-09-12 | 1982-05-19 | Lupke Manfred Arno Alfred | Feeding mechanism |
| JPS58219027A (en) * | 1982-06-14 | 1983-12-20 | Sajiki Akiko | Manufacture and appratus for reinforced resin pipe having outer peripheral surface of bellows form and inner peripheral surface of cylindrical form |
-
1988
- 1988-02-29 JP JP63048280A patent/JPH01221219A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780028A (en) * | 1980-09-12 | 1982-05-19 | Lupke Manfred Arno Alfred | Feeding mechanism |
| JPS58219027A (en) * | 1982-06-14 | 1983-12-20 | Sajiki Akiko | Manufacture and appratus for reinforced resin pipe having outer peripheral surface of bellows form and inner peripheral surface of cylindrical form |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997022457A1 (en) * | 1995-12-19 | 1997-06-26 | E.I. Du Pont De Nemours And Company | Apparatus for shaping and cooling corrugated plastic pipes |
| KR100865863B1 (en) * | 2007-01-26 | 2008-11-03 | 김중돈 | manufacturing method of vacuum packing film and vacuum packing fil maunfacturing device |
| EP3311977A1 (en) * | 2016-10-18 | 2018-04-25 | Canlar Boru Profil Plastik Elekt.Ins.Mak.Nak.San. Ve Tic.Ltd.Sti. | Plastic pipe machine mandrel cooling and lubricating assembly |
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