JPS581654B2 - Extrusion die for the production of plastic tubes - Google Patents

Extrusion die for the production of plastic tubes

Info

Publication number
JPS581654B2
JPS581654B2 JP52105950A JP10595077A JPS581654B2 JP S581654 B2 JPS581654 B2 JP S581654B2 JP 52105950 A JP52105950 A JP 52105950A JP 10595077 A JP10595077 A JP 10595077A JP S581654 B2 JPS581654 B2 JP S581654B2
Authority
JP
Japan
Prior art keywords
mandrel
nozzle
extrusion die
extrusion
production
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
Application number
JP52105950A
Other languages
Japanese (ja)
Other versions
JPS5334861A (en
Inventor
アントン・アンゲル
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EESUTERAIHISHE SHIFUSUERUFUTEN AG RINTSUUKO RUNOIBURUKU
Original Assignee
EESUTERAIHISHE SHIFUSUERUFUTEN AG RINTSUUKO RUNOIBURUKU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EESUTERAIHISHE SHIFUSUERUFUTEN AG RINTSUUKO RUNOIBURUKU filed Critical EESUTERAIHISHE SHIFUSUERUFUTEN AG RINTSUUKO RUNOIBURUKU
Publication of JPS5334861A publication Critical patent/JPS5334861A/en
Publication of JPS581654B2 publication Critical patent/JPS581654B2/en
Expired legal-status Critical Current

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
    • 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
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • B29C48/25—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
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (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】 本発明は、外ハウジングとマンドレル片とをもつ押出し
ノズルを有する押出しダイの出口環状間隙の幅が、円錐
状に狭くなるハウジング開口中におけるノズルマンドレ
ルの軸線方向移動により調節可能である、プラスチック
管の製造用押出しダイに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method in which the width of the outlet annular gap of an extrusion die having an extrusion nozzle with an outer housing and a mandrel piece is adjusted by axial movement of the nozzle mandrel in a conically narrowing housing opening. The present invention relates to an extrusion die for the production of plastic tubes, which is possible.

この種の公知の押出しダイは、大抵の場合、プラスチッ
ク材料を可塑化して送るスクリュ押出し機の押出しヘッ
ドと共に用いられる。Known extrusion dies of this type are mostly used in conjunction with extrusion heads of screw extruders for plasticizing and feeding plastic material.

管およびチューブは、環状間隙を適当な形状にして、丸
くまたは角ばらせて製造することができる。Tubes and tubes can be made rounded or squared, with the annular gap appropriately shaped.

押出しノズルのマンドレル片全体あるいはマンドレル片
中に出入り可能に支持されたノズルマンドレルのみを、
空気圧や液圧により、あるいは機械的操作機構たとえば
ねじ駆動機構あるいはベルクランク機構を介して、外部
から軸線方向に移動可能に設けることができる。The entire mandrel piece of the extrusion nozzle or only the nozzle mandrel supported in and out of the mandrel piece,
It can be provided to be movable in the axial direction from the outside by pneumatic or hydraulic pressure or via a mechanical actuation mechanism, such as a screw drive mechanism or a bell crank mechanism.

原則的には、円錐状に狭くなるハウジング開口と共に管
の肉厚を定めるこれまでのノズルマンドレル端部も、同
様に円錐状に形成され、したがってハウジング開口の円
錐状部分に対して平行に延びている。In principle, the conventional nozzle mandrel end, which together with the conically narrowing housing opening defines the wall thickness of the tube, is likewise conically shaped and therefore runs parallel to the conical part of the housing opening. There is.

マンドレル片またはノズルマンドレルのこの円錐面は、
運転中押出されるプラスチック材料の作用を受けるので
、マンドレル片に作用する軸線方向推力が生ずる。This conical surface of the mandrel piece or nozzle mandrel is
During operation, an axial thrust is created which acts on the mandrel piece as it is acted upon by the extruded plastic material.

吹込み成形品たとえばびんの製造用パリソンとして用い
られるチューブの製造では、比較的低い圧力でプラスチ
ック材料の加工が行なわれ、いずれにしてもチューブは
パリソンとしてさらに加工されるので、このチューブの
精確な直径および精確な肉厚の維持は、ほとんど問題と
ならない。In the production of tubes used as parisons for the manufacture of blow-molded products, for example bottles, the plastic material is processed at relatively low pressures, and in any case the tubes are further processed as parisons, so that the precision of this tube is very important. Maintaining diameter and accurate wall thickness is of little concern.

これに対し、たとえば温水設備および冷水設備、水道管
、温水暖房設備等に使用される管の製造では、たとえば
高価なポリ塩化ビニルあるいはポリエチレンを押出し加
工するとき、高い圧力で加工を行なわねばならない。On the other hand, in the manufacture of pipes for use in hot and cold water equipment, water pipes, hot water heating equipment, etc., for example, when extruding expensive polyvinyl chloride or polyethylene, processing must be carried out at high pressures.

この高い圧力では、最初にあげた種類のこれまでの押出
しダイは使用できない。At this high pressure, conventional extrusion dies of the first type mentioned cannot be used.

種々の肉厚を設定するため、押出しダイ全体あるいは少
なくともハウジングまたはマンドレルを交換して、所望
の肉厚を得るのが普通である。To set various wall thicknesses, it is common to change the entire extrusion die or at least the housing or mandrel to obtain the desired wall thickness.

このようなダイでは、間隙の壁は、出口ノズルの終端範
囲で、中心軸線に対し平行に延びている。In such dies, the walls of the gap extend parallel to the central axis in the end region of the outlet nozzle.

このダイを使用して、連続する押出し材料の肉厚を変化
せねばならない場合、たとえば管端で肉厚を増大して、
後で厚い材料から取付け片を成形できるようにする場合
、引出し装置に管を通し、そこで引出し速度の変化によ
りマンドレル上あるいは水冷フオーミングダイ中で変形
せねばならないが、それにより連続する押出し品の速度
変化や材料の組織変化が変形区域に生ずる。This die can be used when the wall thickness of successive extruded material has to be varied, for example by increasing the wall thickness at the end of the tube.
If the attachment piece can later be formed from a thick material, the tube must be passed through a drawing device where it is deformed on a mandrel or in a water-cooled forming die due to changes in the drawing speed, thereby increasing the successive extrudates. Velocity changes and material texture changes occur in the deformed area.

そのうえ装置が高価になる。Moreover, the equipment becomes expensive.

本発明の課題は、使用圧力および加工温度が高い高圧ス
クリュ押出し機に使用しても、運転中も肉厚変化を可能
にする前述のような押出しダイを提供することにある。An object of the present invention is to provide an extrusion die as described above, which allows the wall thickness to be changed during operation even when used in a high-pressure screw extruder with high working pressures and high processing temperatures.

この課題を解決するため本発明によれば、マンドレル片
中に一端を支持されかつ円錐状に狭くなるハウジング開
口へ入り込むように軸線方向に移動可能なノズルマンド
レルの押出し材料に接する外周が、その自由端に至るま
で円柱状に形成されている。In order to solve this problem, the invention provides that the outer periphery of the nozzle mandrel, which is supported at one end in the mandrel piece and is movable in the axial direction so as to enter the conically narrowed housing opening, is in contact with the extruded material. It is cylindrical in shape all the way to the end.

本発明による構成では、加工される材料のノズルマンド
レルに作用する圧力は、移動装置により打勝つべき軸線
方向推力を生じない。In the arrangement according to the invention, the pressure acting on the nozzle mandrel of the material to be processed does not create an axial thrust that must be overcome by the displacement device.

したがって移動装置は、ノズルマンドレルへの接着力に
打勝ちさえすればよい。Therefore, the moving device only needs to overcome the adhesion forces to the nozzle mandrel.

ノズルマンドレルの自由端がハウジング開口の中へ入る
ように、ノズルマンドレルが移動せしめられると、出口
環状間隙が増大する。When the nozzle mandrel is moved such that the free end of the nozzle mandrel enters the housing opening, the exit annular gap increases.

環状間隙中においてできる管は、ノズルマンドレルの端
部を越えて張出すハウジング開口の円錐状部分で、わず
かに弾性変形せしめられる。The tube formed in the annular gap is slightly elastically deformed with the conical portion of the housing opening extending beyond the end of the nozzle mandrel.

しかし肉厚は環状間隙により決定される。However, the wall thickness is determined by the annular gap.

押出し機は高い正圧で動作するので、肉厚と共に増大す
る量の材料は、成形管の出口速度を低下することなく、
供給することができる。Since the extruder operates at high positive pressure, the amount of material that increases with wall thickness can be handled without reducing the exit velocity of the formed tube.
can be supplied.

したがって成形管の出て行く速度は、設定される肉厚に
関係なく、またプラスチック材料の強さを低下すること
なく、一定に保たれる。The exit speed of the forming tube is thus kept constant regardless of the set wall thickness and without reducing the strength of the plastic material.

図面について本発明を以下に説明する。The invention will be explained below with reference to the drawings.

第１図には、原理的に公知の構造をもつ押出しヘッドが
示されている。FIG. 1 shows an extrusion head with a construction known in principle.

この押出しヘッドは、互いに接合される３つの部分１，
２．３からなるハウジングをもち、このハウジングの前
方部分１は、フランジ４により、図示してないスクリュ
押出し機の口金に接続することができる。This extrusion head consists of three parts 1, which are joined together
2.3, the front part 1 of which can be connected by means of a flange 4 to the mouthpiece of a screw extruder, not shown.

環状ハウジング部分２は、スパイダ５の所にトーピード
状マンドレル片６を保持している。The annular housing part 2 holds a torpedo-shaped mandrel piece 6 at the spider 5.

部分３には、保持環７により、保持フランジ９をもつ押
出しノズルハウジング８が取付けられている。An extrusion nozzle housing 8 with a retaining flange 9 is attached to the part 3 by means of a retaining ring 7 .

実施例では、このハウジング８の貫通開口１０がノズル
外端の所まで円錐状に狭くなっている。In the exemplary embodiment, the through opening 10 of this housing 8 narrows conically to the outer end of the nozzle.

ノズル開口１０内には同心的にノズルマンドレル１１が
設けられ、このノズルマンドレル１１は、実施例では円
柱状であり、マンドレル片６の対応する穴１２内に、軸
線方向へ移動可能に案内されている。Concentrically arranged in the nozzle opening 10 is a nozzle mandrel 11, which is cylindrical in the exemplary embodiment and is guided so as to be axially movable in a corresponding hole 12 in the mandrel piece 6. There is.

ノズルマンドレル１１は、ナット１４によりピストン棒
１３上に取付けられている。The nozzle mandrel 11 is mounted on the piston rod 13 by a nut 14.

このピストン棒１３はシリンダ空間１６内の動作ピスト
ン１５に移行し、一方この動作ピストン１５は、スパイ
ダ５を通して導かれる管路を介して、両側に選択的に流
体圧を受け、かつ固定され得るようになっている。This piston rod 13 passes into a working piston 15 in a cylinder space 16, which, via a line led through the spider 5, can selectively receive fluid pressure on both sides and be fixed. It has become.

ノズルマンドレル１１の右方への繰出し位置は、ピスト
ン１５が空間１６の端部へ当ることによって、規定され
る。The rightward payout position of the nozzle mandrel 11 is determined by the impingement of the piston 15 against the end of the space 16.

外部から調節可能な止め片１７によって、ノズルマンド
レル１１の左方への移動を制限することができる。A leftward movement of the nozzle mandrel 11 can be limited by an externally adjustable stop piece 17.

第２図と第３図を比較するとわかるように、管の肉厚を
決定する環状間隙１８が、第２図の位置では、第３図に
よる位置におけるより小さい。As can be seen by comparing FIGS. 2 and 3, the annular gap 18, which determines the wall thickness of the tube, is smaller in the position according to FIG. 2 than in the position according to FIG.

所望の最終直径を精確に維持するために、ノズルの後で
、内圧（圧縮空気）を使用して、場合によっては冷却さ
れるフオーミングダイに管を通して導くことができる。After the nozzle, internal pressure (compressed air) can be used to guide the tube through a forming die, which is optionally cooled, in order to precisely maintain the desired final diameter.

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

第１図は本発明による押出しダイを備えたスクリュ押出
し機の押出しヘッドの縦断面図、第２図および第３図は
異なる調節位置における押出しダイの出口端の拡大断面
図である。 １，２，３，８・・・・・・ハウジンク、６・・・・・
・マンドレル片、１０・・・・・・開口、１１・・・・
・・ノズルマンドレノレ。FIG. 1 is a longitudinal sectional view of the extrusion head of a screw extruder with an extrusion die according to the invention, and FIGS. 2 and 3 are enlarged sectional views of the outlet end of the extrusion die in different adjustment positions. 1, 2, 3, 8...Housing, 6...
・Mandrel piece, 10... Opening, 11...
... Nozzle mandrel.

Claims (1)

【特許請求の範囲】[Claims] １ 外ハウジングとマンドレル片とをもつ押出しノズル
を有する押出しダイの出口環状間隙の幅が、円錐状に狭
くなるハウジング開口中におけるノズルマンドレルの軸
線方向移動により調節可能である押出しダイにおいて、
マンドレル片６中に一端を支持されかつ円錐状に狭くな
るハウジング開口へ入り込むように軸線方向へ移動可能
なノズルマンドレル１１の押出し材料に接触する外周が
、その自由端に至るまで円柱状に形成されていることを
特徴とする、プラスチック管の製造用押出しダイ。1. An extrusion die having an extrusion nozzle with an outer housing and a mandrel piece, the width of the outlet annular gap being adjustable by axial movement of the nozzle mandrel in a conically narrowing housing opening,
The outer periphery of the nozzle mandrel 11, which is supported at one end in the mandrel piece 6 and is movable in the axial direction so as to enter the conically narrowed housing opening, which contacts the extruded material, is cylindrically shaped up to its free end. An extrusion die for the production of plastic pipes, characterized by:
JP52105950A 1976-09-07 1977-09-05 Extrusion die for the production of plastic tubes Expired JPS581654B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0663376A AT363669B (en) 1976-09-07 1976-09-07 SPRAY HEAD FOR THE PRODUCTION OF PLASTIC TUBES

Publications (2)

Publication Number Publication Date
JPS5334861A JPS5334861A (en) 1978-03-31
JPS581654B2 true JPS581654B2 (en) 1983-01-12

Family

ID=3588285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52105950A Expired JPS581654B2 (en) 1976-09-07 1977-09-05 Extrusion die for the production of plastic tubes

Country Status (9)

Country Link
JP (1) JPS581654B2 (en)
AT (1) AT363669B (en)
CH (1) CH623506A5 (en)
DE (1) DE2739892A1 (en)
ES (1) ES462179A1 (en)
FR (1) FR2363424A1 (en)
GB (1) GB1552528A (en)
IT (1) IT1084739B (en)
SE (1) SE7709999L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013123A (en) * 1983-07-01 1985-01-23 Meisei Kogyo Kk Structure of basement
JPH0442365Y2 (en) * 1985-12-04 1992-10-06

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197129A (en) * 1981-05-29 1982-12-03 Sekisui Chem Co Ltd Extrusion molding apparatus of tubular object
GB2153279B (en) * 1984-02-01 1987-07-29 Atomic Energy Authority Uk A method and apparatus for extrusion
FR2626811B1 (en) * 1988-02-04 1990-08-24 Bertho Patrick DEVICE FOR VARIATION IN MASSES OF EXTRUDED ARTICLES
EP0444224B1 (en) * 1990-02-27 1994-12-14 Nederlandse Pillo-Pak Maatschappij B.V. Extrusion head regulator
EP0683629A1 (en) * 1992-12-18 1995-11-29 The Pillsbury Company Extrusion die with changeable face plate
CN108047609A (en) * 2017-12-30 2018-05-18 四川省广元市康康医疗器械有限公司 A kind of mesohigh connecting tube formula and mesohigh connecting tube extruded mould
CN110328822A (en) * 2019-08-06 2019-10-15 江苏塑之源机械制造有限公司 A kind of insulating tube and its extrusion die and manufacturing method
CN116604795B (en) * 2023-06-30 2023-10-20 扬州华通橡塑有限公司 Sealing member extrusion die
CN117818009B (en) * 2024-02-22 2024-08-20 河北鑫鹏通信设备有限公司 PE pipe processing die based on port structure convenient to detach

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE601334C (en) * 1931-07-21 1934-08-18 Inh Heinrich Supthut Device and production of hollow bodies closed on all sides or on five sides on extrusion
DE595923C (en) * 1931-11-11 1934-04-24 Paul Thomas Process for the production of hollow bodies closed on all sides or on five sides on extrusion presses
FR978528A (en) * 1942-12-17 1951-04-16 Specialites Mecaniques Soc D Improvement in extrusion machines
FR1385115A (en) * 1964-03-06 1965-01-08 Union Carbide Corp Method and apparatus for making hollow articles from thermoplastic material
US3357050A (en) * 1966-03-11 1967-12-12 Owens Illinois Inc Apparatus for extruding plasticized material
FR1546322A (en) * 1967-12-04 1968-11-15 Ball Brothers Co Inc Method and apparatus for forming defect-free tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013123A (en) * 1983-07-01 1985-01-23 Meisei Kogyo Kk Structure of basement
JPH0442365Y2 (en) * 1985-12-04 1992-10-06

Also Published As

Publication number Publication date
SE7709999L (en) 1978-03-08
GB1552528A (en) 1979-09-12
AT363669B (en) 1981-08-25
JPS5334861A (en) 1978-03-31
CH623506A5 (en) 1981-06-15
ATA663376A (en) 1981-01-15
IT1084739B (en) 1985-05-28
FR2363424A1 (en) 1978-03-31
DE2739892A1 (en) 1978-03-09
ES462179A1 (en) 1978-06-16

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