JPS58201620A - Manufacture of flexible synthetic resin conduit tube - Google Patents

Manufacture of flexible synthetic resin conduit tube

Info

Publication number
JPS58201620A
JPS58201620A JP57085182A JP8518282A JPS58201620A JP S58201620 A JPS58201620 A JP S58201620A JP 57085182 A JP57085182 A JP 57085182A JP 8518282 A JP8518282 A JP 8518282A JP S58201620 A JPS58201620 A JP S58201620A
Authority
JP
Japan
Prior art keywords
rib
pipe
resin
extruding
port
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
Application number
JP57085182A
Other languages
Japanese (ja)
Inventor
Yasuo Negishi
根岸　靖夫
Toshiichi Nakaya
仲谷　敏一
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP57085182A priority Critical patent/JPS58201620A/en
Publication of JPS58201620A publication Critical patent/JPS58201620A/en
Pending 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
    • B29C48/16—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
    • B29C48/001—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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow 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
    • B29C48/13—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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacturing Of Electric Cables (AREA)

Abstract

PURPOSE:To obtain the titled conduit tube light in weight and excellent in bendability and pressure resistance, by a method wherein a rib formed from a synthetic resin by extrusion, a sheath is extruded thereon, and the sheath is brought into close contact with the rib by drawing vacuum to obtain a corrugated configuration. CONSTITUTION:A resin for forming a rib is poured into a pouring port A for the resin, the rib is extruded through a rib-extruding port 3' in a string form, is placed into a rib-feeding screw 6, a rib-extruding rotary die 3 and the screw 6 are synchronously rotated in the same direction, a rib-feeding guide 7 is rotated in the reverse direction to form the rib 1a into a coil shape, and the rib 1a is fed out forward. On the other hand, a resin 1 melted in an extruder is poured through a pouring port B for the resin 1 for forming a pipe, the pipe 1b is extruded through a pipe-extruding port 5' of a pipe-extruding fixed die 5, is fed forwards while making close contact with the rib 1a, and vacuum is drawn through a evacuating port C utilizing an evacuating pipe 9 provided at a central part of an inside mandrel 10 to obtain the objective corrugated pipe 1b.

Description

【発明の詳細な説明】 本発明は軽量かつ屈曲性、耐圧性にすぐれた合成樹脂筒
とう電線管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin cylindrical electrical conduit that is lightweight, has excellent flexibility and pressure resistance.

合成樹脂よりなる管は、通信ケーブル、電カケープルの
保護管等に使用されているが、その一般的構造は単に円
管状あるいは、波形形状を有するものである。Tubes made of synthetic resin are used for communication cables, protection tubes for power cables, etc., but their general structure is simply circular or wavy.

上記の波形形状の合成樹脂筒とう電線管（以下電線管と
略す）を製造するには波形成形用の金型を用いるので、
型締め、成形並びに型外し時間がどうしても必要となり
、製造速度に限界を生じていた。In order to manufacture the above-mentioned wave-shaped synthetic resin conduit (hereinafter referred to as conduit), a mold for wave-forming is used.
The mold clamping, molding, and mold removal time were unavoidably required, which placed a limit on manufacturing speed.

本発明の電線管の製造方法は上記の点に鑑みなされたも
ので、その特徴はリブを押出し成形し、その上にシース
を押出し被せ、真空引きによりシースをリブに密着させ
て波形形状に成形することにある。The method for manufacturing electrical conduits of the present invention was developed in view of the above points, and its characteristics include extrusion molding of ribs, extrusion and covering of the sheath over the ribs, and forming the sheath into a wavy shape by applying a vacuum to bring the sheath into close contact with the ribs. It's about doing.

本発明の電線管の製造方法を第１図に基づいて説明する
。The method for manufacturing a conduit according to the present invention will be explained based on FIG. 1.

押出機（図示省略）より溶融した樹脂をリブ用樹脂注入
口Ａより注入する。Molten resin from an extruder (not shown) is injected from rib resin injection port A.

注入された樹脂１がリブ押出し用回転ダイス６の円周方
向の／ケ所に設けられているリブ押出口６′より紐状に
リブ１ａを押出してこれをリプ送り用スクリュー６に入
れる。なお２はリブ押出し用芯金である。The injected resin 1 extrudes ribs 1a in the form of a string from rib extrusion ports 6' provided at / in the circumferential direction of the rotating die 6 for extruding ribs, and the ribs 1a are introduced into the screw 6 for feeding the ribs. Note that 2 is a core metal for extruding ribs.

−リブ押出し用回転ダイス６とリブ送り用スクリュー６
は、同一方向に同期回転させ、リブ送り用ガイド７を逆
方向に回転させているため、リブ送り用スクリュー６に
入ったリブ１ａはコイル状に成形されて前方に送り出さ
れる。-Rotating die 6 for extruding ribs and screw 6 for feeding ribs
are rotated synchronously in the same direction and the rib feeding guide 7 is rotated in the opposite direction, so that the rib 1a that has entered the rib feeding screw 6 is formed into a coil shape and sent forward.

次にパイプの成形について説明する。Next, forming the pipe will be explained.

押出４＠（図示省略）より溶融した樹脂をパイプ用樹脂
注入口Ｂより注入する。Extrusion 4 (not shown) melted resin is injected from pipe resin injection port B.

注入された樹脂１がパイプ押出し用固定ダイス５の円周
方向の全周に設けられているパイプ押出口５′よりパイ
プ１ｂを押出し、これが前記のリブ１ａに密着するよう
になる。（４はパイプ押出し用芯金） この状態で前方へパイプ１ｂとリブ１ａとが送り出され
て行き、インサイドマンドレル１０の中央部に設けられ
ている真空引管９を用い真空引口Ｃより真空引きするた
め、図示の如くパイプ１ｂが波形に真空成形されること
になる。The injected resin 1 extrudes the pipe 1b from the pipe extrusion opening 5' provided around the entire circumference of the fixed die 5 for extruding the pipe, and the pipe 1b comes into close contact with the rib 1a. (4 is a core metal for pipe extrusion) In this state, the pipe 1b and the rib 1a are sent forward, and the vacuum is drawn from the vacuum port C using the vacuum pipe 9 provided in the center of the inside mandrel 10. Therefore, the pipe 1b is vacuum formed into a corrugated shape as shown in the figure.

前述の如く、コイル状に成形されたリブ１ａにパイプ１
ｂが密着し、この状態で前方に送り出されるとともに真
空引きされ、パイプがリブに沿って真空成形され、この
パイプの内径はインサイドマンドレル１０の外径で規制
されて内径の寸法が定まる。As mentioned above, the pipe 1 is attached to the coiled rib 1a.
b are in close contact with each other, and in this state they are sent forward and evacuated to form a pipe along the ribs.

また、インサイドマンドレル１０の中央部に設けられて
いる冷却管８に冷却水を冷却水注入口りより注入し循環
させることで真空成形したパイプ並びにリブを冷却して
所定の形状寸法に定めることができる。In addition, by injecting cooling water from a cooling water inlet into the cooling pipe 8 provided in the center of the inside mandrel 10 and circulating it, the vacuum-formed pipe and ribs can be cooled and defined into a predetermined shape and size. can.

本発明の電線管製造方法の利点は ｉｌｌ　　金型を用いないので、型締め、成形並びに型
外し時間が不要となる。The advantage of the electric conduit manufacturing method of the present invention is that it does not use an ill mold, so there is no need for mold clamping, molding, or mold removal time.

（２１＋１１の理由により、製造速度が向上し、金型不
要のため設備費も安くなる。(Due to the 21+11 reason, manufacturing speed is improved and equipment costs are reduced because no molds are required.

等である。etc.

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

第１図は本発明に係る電線管製造方法の説明図である。 １・・・樹脂、１ａ・・・リブ、１ｂ・・・パイプ、２
・・・リブ押出し用芯金、６・・・リブ押出し用回転ダ
イス、６′・・・リブ押出し口、４・・・パイプ押出し
用芯金、５・・・パイ・プ押出し用回転ダイス、５′・
・・パイプ押出し口、６・・・リブ送り用スクリュー、
７・・・リプ送り用ガイド、８・・・冷却管、９・・・
真空引管、１０・・・インサイドマンドレル、Ａ・・・
リブ用樹脂注入口、Ｂ・・・パイプ用樹脂注入口、Ｃ・
・・真空引口、Ｄ・・・冷却水注入口。FIG. 1 is an explanatory diagram of a method for manufacturing a conduit according to the present invention. 1... Resin, 1a... Rib, 1b... Pipe, 2
... Core metal for extruding ribs, 6... Rotating die for extruding ribs, 6'... Rib extrusion port, 4... Core metal for extruding pipes, 5... Rotating die for extruding pipes, 5'・
...Pipe extrusion port, 6...Rib feeding screw,
7... Lip feed guide, 8... Cooling pipe, 9...
Vacuum tube, 10...Inside mandrel, A...
Resin injection port for ribs, B...Resin injection port for pipes, C.
...Vacuum inlet, D...Cooling water inlet.

Claims (1)

【特許請求の範囲】[Claims] １、　らせん状の波形形状を有し、内側にらせん状リブ
を設けている合成樹脂よりなる町とう電線管を製造する
に、リブを紐状に押出した後、このリブを等ピッチのら
せん状に成形し、この上にシースを押出して被せ、この
シースを真空引きしてらせん状のリブに密着させて波形
形状に成形することを特徴とする合成樹脂筒とう電線管
の製造方法。1. To manufacture a town power conduit made of synthetic resin that has a spiral waveform shape and has spiral ribs on the inside, the ribs are extruded into a string shape, and then the ribs are shaped into a spiral shape with an equal pitch. A method for manufacturing a synthetic resin cylindrical electric conduit, which is characterized by forming a synthetic resin cylindrical conduit into a corrugated shape, extruding a sheath to cover the conduit, and evacuating the sheath to bring it into close contact with a spiral rib to form a corrugated shape.
JP57085182A 1982-05-19 1982-05-19 Manufacture of flexible synthetic resin conduit tube Pending JPS58201620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57085182A JPS58201620A (en) 1982-05-19 1982-05-19 Manufacture of flexible synthetic resin conduit tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57085182A JPS58201620A (en) 1982-05-19 1982-05-19 Manufacture of flexible synthetic resin conduit tube

Publications (1)

Publication Number Publication Date
JPS58201620A true JPS58201620A (en) 1983-11-24

Family

ID=13851511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57085182A Pending JPS58201620A (en) 1982-05-19 1982-05-19 Manufacture of flexible synthetic resin conduit tube

Country Status (1)

Country Link
JP (1) JPS58201620A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528770U (en) * 1975-07-04 1977-01-21
JPS55139229A (en) * 1979-04-19 1980-10-30 Torii Kasei Kk Preparation of spiral tube reinforced with rib

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528770U (en) * 1975-07-04 1977-01-21
JPS55139229A (en) * 1979-04-19 1980-10-30 Torii Kasei Kk Preparation of spiral tube reinforced with rib

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