JPH0357847B2 - - Google Patents
Info
- Publication number
- JPH0357847B2 JPH0357847B2 JP58175597A JP17559783A JPH0357847B2 JP H0357847 B2 JPH0357847 B2 JP H0357847B2 JP 58175597 A JP58175597 A JP 58175597A JP 17559783 A JP17559783 A JP 17559783A JP H0357847 B2 JPH0357847 B2 JP H0357847B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical fabric
- cylindrical
- fabric
- mandrel
- tip
- 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 - Lifetime
Links
- 239000004744 fabric Substances 0.000 claims description 75
- 238000001125 extrusion Methods 0.000 claims description 31
- 229920003002 synthetic resin Polymers 0.000 claims description 24
- 239000000057 synthetic resin Substances 0.000 claims description 24
- 239000011247 coating layer Substances 0.000 claims description 21
- 229920001169 thermoplastic Polymers 0.000 claims description 13
- 239000004416 thermosoftening plastic Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004033 plastic 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
- B29C48/15—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
- B29C48/09—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
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、筒状の布帛の外面に合成樹脂よりな
る気密性の被覆層を形成するための、方法及び装
置に関するものであつて、本発明によつて形成さ
れた被覆層を有する筒状布帛は、ガス管、水道管
等の、主として地中に埋設された管路に内張りす
るための内張り材として使用することができ、ま
たこれを裏返すことにより、内面に合成樹脂皮膜
を有する消防用等の、ホースを得ることができる
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for forming an airtight coating layer made of synthetic resin on the outer surface of a cylindrical fabric, and The cylindrical fabric with the coating layer can be used as a lining material for lining pipes buried underground, such as gas pipes and water pipes, and by turning it inside out, it can be It is possible to obtain hoses for fire fighting, etc., which have a resin film.
上記のような、管路の内張り材や消防用等のホ
ースにおいては、被覆層は気密性を有しており、
且つ、筒状布帛に対して強固に接着されているこ
とが必要であり、また、被覆層を接着したことに
より、筒状布帛が硬くなることがあつてはならな
い。 In the above-mentioned pipe lining materials and fire hoses, the coating layer has airtightness.
In addition, it must be firmly adhered to the cylindrical fabric, and the cylindrical fabric must not become hard due to adhesion of the covering layer.
而して前記のような筒状布帛の外面に合成樹脂
の被覆層を形成する方法としては、筒状布帛をラ
テツクス液等に浸漬し、これを乾燥して被覆とす
る方法が知られているが、この方法は合成樹脂の
被覆を形成する方法としては適しておらず、また
ラテツクスが筒状布帛の繊維の中に深く侵入し、
筒状布帛が硬くなる欠点がある。 As a method for forming a synthetic resin coating layer on the outer surface of a cylindrical fabric as described above, a method is known in which the cylindrical fabric is immersed in a latex liquid or the like and then dried to form a coating. However, this method is not suitable for forming a synthetic resin coating, and the latex penetrates deeply into the fibers of the tubular fabric.
The drawback is that the tubular fabric becomes stiff.
また筒状布帛の外側に押出成型法により合成樹
脂チユーブを成型し、該チユーブ筒状布帛に貼付
けて被覆層を形成する方法も知られている。しか
しながらこの方法においては、筒状布帛と被覆層
との密着強さが充分でなく、剥がれ易い。出願人
は先に特願昭58−108413号において、押出された
合成樹脂チユーブ内を減圧して筒状布帛に密着さ
せる方法及び装置を発明し、出願したが、この発
明においても充分な密着強さを得ることができな
かつた。 Also known is a method in which a synthetic resin tube is molded on the outside of a cylindrical fabric by extrusion molding, and the tube is attached to the cylindrical fabric to form a coating layer. However, in this method, the adhesion strength between the cylindrical fabric and the coating layer is not sufficient and the coating layer is likely to peel off. The applicant had previously invented and applied for a method and device for reducing the pressure inside an extruded synthetic resin tube and bringing it into close contact with a cylindrical fabric in Japanese Patent Application No. 58-108413. I couldn't get it to work.
本発明はかかる事情に鑑がみなされたものであ
つて、筒状布帛の外面に合成樹脂の被覆層を形成
し、該被覆層の筒状布帛に対する密着力を向上さ
せることを目的とするものである。 The present invention has been made in view of the above circumstances, and an object of the present invention is to form a synthetic resin coating layer on the outer surface of a cylindrical fabric, and to improve the adhesion of the coating layer to the cylindrical fabric. It is.
すなわち、第一の発明は、筒状布帛を上方から
下方に一定の速度で進行させつつ押出しヘツド内
を通過せしめ、該押出しヘツドの先端部におい
て、前記筒状布帛内に、該筒状布帛の内径にほゞ
等しいか又はそれよりやゝ小さい外径の円筒状の
マンドレルチツプを挿入して筒状布帛を円筒状に
保持し、該円筒状の筒状布帛の外方において、前
記押出しヘツドから前記筒状布帛の外径にほゞ等
しいか又はそれよりやゝ大きい内径の熱可塑性合
成樹脂チユーブを押出し、前記マンドレルチツプ
より下方の筒状布帛を内側から数箇所において間
欠的に支持して断面をほゞ円形に保持しつつ、当
該支持部分の間において筒状布帛内を減圧するこ
とにより、前記熱可塑性合成樹脂チユーブを前記
筒状布帛の外面に密着被覆させることを特徴とす
るものであり、第二の発明は、下方に向かつて円
筒状の熱可塑性合成樹脂チユーブを押出すことが
でき、且つその中心軸に沿つて空洞を形成した押
出しヘツドと、外押出しヘツドの先端部の空洞内
に、前記押出しヘツドとの間に筒状布帛が通過し
得る間〓を置いて支持されたマンドレルチツプ
と、該マンドレルチツプを貫いて上下に延びる吸
引シヤフトと、前記マンドレルチツプの下方にお
いて前記吸引シヤフトに固定して設けられた、前
記マンドレルチツプと同径の複数の拡開円盤と、
前記吸引シヤフトの上端に設けられた、前記マン
ドレルチツプと同径の二個のシール部材と、前記
シール部材間を減圧する吸引部材とよりなり、前
記吸引シヤフトは管状であつて、前記シール部材
間の部分並びに前記マンドレルチツプと拡開円盤
との間及び前記拡開円盤間の部分には、管内に通
じる透孔が形成されており、前記筒状布帛を前記
シール部材、マンドレルチツプ及び拡開円盤によ
り断面略円形に膨らませつつ、前記押出ヘツドの
空洞内を一定の速度で通過せしめ、前記押出しヘ
ツドの先端において、その外周部において前記押
出ヘツドから円筒状の熱可塑性合成樹脂チユーブ
を押出し、前記拡開円盤間の空気を前記吸引シヤ
フトを介して吸引部材で吸引して減圧し、その減
圧により前記合成樹脂チユーブを筒状布帛の外面
に被覆するようにしたことを特徴とするものであ
る。 That is, in the first invention, the cylindrical fabric is made to pass through an extrusion head while advancing from above to below at a constant speed, and the cylindrical fabric is inserted into the cylindrical fabric at the tip of the extrusion head. A cylindrical mandrel tip having an outer diameter approximately equal to or slightly smaller than the inner diameter is inserted to hold the cylindrical fabric in a cylindrical shape, and the extrusion head is inserted into the cylindrical fabric from the extrusion head on the outside of the cylindrical fabric. A thermoplastic synthetic resin tube having an inner diameter approximately equal to or slightly larger than the outer diameter of the cylindrical fabric is extruded, and the cylindrical fabric below the mandrel tip is intermittently supported from the inside at several points to form a cross-section. The thermoplastic synthetic resin tube is tightly coated on the outer surface of the cylindrical fabric by holding the cylindrical fabric in a substantially circular shape and reducing the pressure within the cylindrical fabric between the support portions. The second invention includes an extrusion head capable of extruding a cylindrical thermoplastic synthetic resin tube in a downward direction and having a cavity formed along its central axis, and a cavity at the tip of the external extrusion head. a mandrel tip supported at a distance from the extrusion head through which the cylindrical fabric can pass; a suction shaft extending vertically through the mandrel tip; and a suction shaft below the mandrel tip. a plurality of expansion disks having the same diameter as the mandrel tip, fixedly provided on the mandrel tip;
The suction shaft includes two seal members having the same diameter as the mandrel tip, which are provided at the upper end of the suction shaft, and a suction member that reduces pressure between the seal members. A through hole communicating with the inside of the tube is formed in a portion between the mandrel tip and the expansion disk, and a portion between the expansion disk. While inflating it to a substantially circular cross section, the tube is passed through the cavity of the extrusion head at a constant speed, and at the tip of the extrusion head, a cylindrical thermoplastic synthetic resin tube is extruded from the extrusion head at its outer periphery. The air between the open discs is sucked and depressurized by a suction member through the suction shaft, and the synthetic resin tube is coated on the outer surface of the cylindrical fabric by the depressurization.
以下、図面に従つて本発明の実施例を説明す
る。第１図は、本発明の装置の一実施例を示すも
のである。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the apparatus of the present invention.
１は押出し装置であつて、その先端には押出し
ヘツド２が下向きに取付けられている。押出しヘ
ツド２は、外殻体３と芯体４とよりなり、その間
に樹脂通路５が形成されており、該樹脂通路５の
先端には、環状の吐出口６が形成されている。ま
た前記芯体４の中心部には、空洞７が形成され、
該空洞７の後部には、吸引部材８が設けられてい
る。空洞７の下端部と内径は、筒状布帛Ａの外径
にほゞ等しいか、又はそれよりもやゝ大きいもの
となつている。 1 is an extrusion device, and an extrusion head 2 is attached to the tip thereof facing downward. The extrusion head 2 consists of an outer shell 3 and a core 4, with a resin passage 5 formed therebetween, and an annular discharge port 6 formed at the tip of the resin passage 5. Further, a cavity 7 is formed in the center of the core body 4,
A suction member 8 is provided at the rear of the cavity 7. The lower end and inner diameter of the cavity 7 are approximately equal to or slightly larger than the outer diameter of the cylindrical fabric A.
９は、マンドレチツプであつて、その外径が前
記筒状布帛Ａの内径にほゞ等しいか又は、それよ
りも僅かに小さい円筒形であつて、前記押出しヘ
ツド２の空洞７の下端に、該空洞７の内面との間
に若干の間隙をおいて、位置せしめられている。 Reference numeral 9 denotes a mandre tip, which has a cylindrical shape whose outer diameter is approximately equal to or slightly smaller than the inner diameter of the cylindrical fabric A, and is placed at the lower end of the cavity 7 of the extrusion head 2. It is positioned with a slight gap between it and the inner surface of the cavity 7.
該マンドレルチツプ９を貫いて、吸引シヤフト
１０が設けられ、該吸引シヤフト１０は前記マン
ドレルチツプ９の下方及び上方に伸びている。而
して前記マンドレルチツプ９の下方の吸引シヤフ
ト１０には、前記マンドレルチツプ９とほゞ同径
の拡開円盤１１が複数取付けられている。また前
記吸引シヤフト１０の上端部には二つのシール部
材１２が設けれており、該シール部材１２は、前
記吸引部材８内に位置している。 A suction shaft 10 is provided through the mandrel tip 9 and extends below and above the mandrel tip 9. A plurality of expansion disks 11 having substantially the same diameter as the mandrel tip 9 are attached to the suction shaft 10 below the mandrel tip 9. Further, two seal members 12 are provided at the upper end of the suction shaft 10, and the seal members 12 are located within the suction member 8.
前記吸引シヤフト１０は中空の管状であつて、
前記シール部材１２間の部分、並びにマンドレル
チツプ９と拡開円盤１１との間及び拡開円盤１１
間の部分に、それぞれ透孔１３，１５が穿設され
ており、前記吸引部材８にはシール部材１２間の
位置に吸引口１６が形成され、バキユームポンプ
に接続されている。 The suction shaft 10 has a hollow tubular shape, and
The portion between the sealing members 12, and between the mandrel tip 9 and the expansion disk 11 and the expansion disk 11
Through-holes 13 and 15 are respectively formed in the portions between them, and a suction port 16 is formed in the suction member 8 at a position between the seal members 12, and is connected to a vacuum pump.
また前記吸引シヤフト１０の後部にはロツド１
７が取付けられて上方に伸びている。ロツド１７
の上端には、断面略砲弾状のホルダー１８が取付
けられており、該ホルダー１８の両肩部には、小
ローラー１９が回転自在に軸支され、支持ローラ
ー２０によつて支持されている。 Further, a rod 1 is installed at the rear of the suction shaft 10.
7 is attached and extends upward. rod 17
A holder 18 having a generally bullet-shaped cross section is attached to the upper end of the holder 18 . Small rollers 19 are rotatably supported on both shoulders of the holder 18 and supported by support rollers 20 .
２２は予熱炉であつて、熱風吹込み口２３から
熱風を吹込み、該予熱炉内を加熱するようになつ
ている。２１は筒状布帛を下方に送る送り込み装
置である。 Reference numeral 22 denotes a preheating furnace, which blows hot air through a hot air blowing port 23 to heat the inside of the preheating furnace. 21 is a feeding device that feeds the cylindrical fabric downward.
前記押出しヘツド２の下方には、ウオーターバ
ス２４が設けられており、該ウオーターバス２４
内には、反転ローラー２５が回転自在に軸支され
ている。２６はガイドローラーであり、２７は引
取り装置である。 A water bath 24 is provided below the extrusion head 2.
A reversing roller 25 is rotatably supported inside. 26 is a guide roller, and 27 is a take-off device.
而して、筒状布帛Ａは、偏平に折畳まれた状態
でリール２８に巻回されており、該リール２８か
ら引出されて、誘導ローラー２９を経て装置の上
方から供給される。而して筒状布帛Ａは、前記ホ
ルダー１８の外側に被さり、小ローラー１９と支
持ローラー２０との間を通つて下方に進行し、送
り込み装置２１により、さらに下方に送られる。 The cylindrical fabric A is wound around a reel 28 in a flat folded state, and is pulled out from the reel 28 and fed from above the apparatus via a guide roller 29. The cylindrical fabric A is placed over the outside of the holder 18, passes between the small roller 19 and the support roller 20, moves downward, and is sent further downward by the feeding device 21.
そして筒状布帛Ａは、先ず焼熱炉２２内に進入
し、ここで熱風により加熱される。続いて筒状布
帛Ａは、押出しヘツド２の空洞７内に進入せしめ
られる。さらに筒状布帛Ａは前記シール部材１２
の外側に被さり、断面円形の状態で該シール部材
１２と吸引部材８との間を通り、押出しヘツド２
の空洞７内を通過し、その下端において前記マン
ドレルチツプ９に被さり、該マンドレルチツプ９
と、前記押出しヘツド２の下端との間の間隙を通
つて、さらに前記拡開円盤１１によつて断面円形
の状態を保持されつつ下方に進行する。 The cylindrical fabric A first enters the firing furnace 22, where it is heated by hot air. Subsequently, the tubular fabric A is introduced into the cavity 7 of the extrusion head 2. Further, the cylindrical fabric A is attached to the sealing member 12.
The extrusion head 2 passes between the sealing member 12 and the suction member 8 with a circular cross section.
passes through the cavity 7 of the mandrel chip 9 and covers the mandrel chip 9 at its lower end.
and the lower end of the extrusion head 2, and further advances downward while being held in a circular cross-sectional state by the expansion disk 11.
一方、前記押出し機１から押出された熱可塑性
合成樹脂は、押出しヘツド２内の樹脂通路５を通
り、押出しヘツド２の先端において、吐出口６か
ら熱可塑性合成樹脂チユーブＢとなつて押出され
る。 On the other hand, the thermoplastic synthetic resin extruded from the extruder 1 passes through the resin passage 5 in the extrusion head 2, and is extruded from the discharge port 6 at the tip of the extrusion head 2 as a thermoplastic synthetic resin tube B. .
このとき、前記吸引口１６から吸引され、透孔
１３から吸引シヤフト１０を介して透孔１５から
空気が吸引され、マンドレルチツプ９と拡開円盤
１１との間及び拡開円盤１１間の筒状布帛Ａ内が
減圧されているので、熱可塑性合成樹脂チユーブ
Ｂ内の空気も、筒状布帛Ａの布目の間を通つて吸
引され、減圧されている。従つて熱可塑性合成樹
脂チユーブＢは、内部を減圧されるので径が収縮
する。このときには熱可塑性合成樹脂チユーブＢ
は、押出された直後で未だ温度が高く、塑性変形
性を有する状態であるので、前記筒状布帛Ａの外
表面に密着し、強固に接着され、被覆層３を形成
するのである。 At this time, air is sucked from the suction port 16, air is sucked from the through hole 15 through the suction shaft 10, and air is sucked from the through hole 15 through the suction shaft 10, and the air is sucked from the through hole 15 through the suction shaft 10, and air is sucked from the through hole 15 through the suction shaft 10. Since the pressure within the fabric A is reduced, the air within the thermoplastic synthetic resin tube B is also sucked through the grains of the cylindrical fabric A, and the pressure is reduced. Therefore, the inside of the thermoplastic synthetic resin tube B is reduced in pressure, so that its diameter shrinks. In this case, thermoplastic synthetic resin tube B
Immediately after being extruded, the material is still at a high temperature and has plastic deformability, so it closely adheres to the outer surface of the cylindrical fabric A and is firmly adhered to form the covering layer 3.
続いて、外表面に被覆層を形成した筒状布帛Ｃ
は、拡開円盤１１により断面円形に拡開されつつ
下方に進行する。外表面に被覆層を形成した筒状
布帛Ｃの内部は前述のように減圧されているの
で、マンドレルチツプ９を通り過ぎた被覆層を有
する筒状布帛Ｃを、このまま下方に進行させる
と、内張り材１は外圧により急激に押し潰され、
扁平に折畳まれるため、被覆層を有する筒状布帛
Ｃ内が充分に減圧されにくい。本発明によれば被
覆層を有する筒状布帛Ｃは拡開円盤１１で拡開さ
れているので、充分長い距離に亘つて充分に減圧
されるので、合成樹脂チユーブＢは長時間に亘つ
て筒状布帛Ａに圧着され、充分な密着力を発揮し
得るのである。 Subsequently, a cylindrical fabric C with a coating layer formed on the outer surface
is expanded into a circular cross section by the expansion disk 11 and advances downward. Since the inside of the cylindrical fabric C with the coating layer formed on its outer surface is under reduced pressure as described above, if the cylindrical fabric C with the coating layer that has passed the mandrel tip 9 is allowed to proceed downward as it is, the lining material 1 is suddenly crushed by external pressure,
Since it is folded flat, it is difficult to sufficiently reduce the pressure inside the cylindrical fabric C having the coating layer. According to the present invention, since the cylindrical fabric C having the coating layer is expanded by the expansion disk 11, the pressure is sufficiently reduced over a sufficiently long distance, so that the synthetic resin tube B remains cylindrical for a long time. It is crimped onto the shaped fabric A and can exhibit sufficient adhesion.
実施例においては、シール部材１２及びマンド
レルチツプ９の外周にシールリング３２が嵌合さ
れ、上下からの空気の洩れを阻止している。また
このようにしても筒状布帛Ａの繊維の間を通して
シール部から空気が洩れ、空洞７内が減圧される
ことがあるので、実施例においてはシール部材１
２とマンドレルチツプ９との間の空洞７に通気口
３０を形成し、空洞７内が過度に減圧されるのを
防止している。外面に被膜層を形成した筒状布帛
Ｃは、前記複数の拡開部剤１１を通り抜けて下方
に進行し、扁平に折畳まれ、ウオーターバス２４
内に進入し、ここで全体に充分に冷却される。そ
してウオーターバス２４内で反転ローラー２５に
より進行方向を反転せしめられ、引取り装置２７
により引取られ、巻取リール３１に巻きとられ
る。 In the embodiment, a seal ring 32 is fitted around the outer periphery of the seal member 12 and the mandrel chip 9 to prevent air from leaking from above and below. Further, even if this is done, air may leak from the sealing part through between the fibers of the cylindrical fabric A, and the pressure inside the cavity 7 may be reduced. Therefore, in the embodiment, the sealing member 1
A vent hole 30 is formed in the cavity 7 between the mandrel tip 2 and the mandrel chip 9 to prevent the inside of the cavity 7 from being excessively depressurized. The cylindrical fabric C having a coating layer formed on its outer surface passes through the plurality of expansion parts 11, advances downward, is folded flat, and is placed in the water bath 24.
inside, where it is thoroughly cooled. Then, the direction of movement is reversed by a reversing roller 25 in the water bath 24, and the take-up device 27
is taken up and wound onto a take-up reel 31.
実施例においては、筒状布帛Ａ及び被覆層を有
する筒状布帛Ｃは、送込み装置２１と引取り装置
２７とによつて進行せしめられる。この両者の、
筒状布帛Ａ及び被覆層を有する筒状布帛Ｃに対す
る、送込み及び引取りの速度は、ほゞ等速とする
のがよく、引取り装置２７による引取り速度が、
送込み装置２１による送込み速度よりも若干速く
てもよい。引取り装置２７による引取り速度が過
度に速いと、筒状布帛Ａとマンドレルチツプ９や
拡開円盤１１との、摩擦抵抗が大きくなるので好
ましくない。逆に送込み装置２１による筒状布帛
Ａの送込み速度が大きいと、筒状布帛Ａにたるみ
が生じ、均一な被覆層を有する筒状布帛Ｃが得ら
れない。また送込み装置２１は、必ずしも必要で
はなく、筒状布帛を引取り装置２７のみによつて
進行させることも可能である。 In the embodiment, the cylindrical fabric A and the cylindrical fabric C having the coating layer are advanced by a feeding device 21 and a take-off device 27. Both of these
The feeding and taking-off speeds for the tubular fabric A and the tubular fabric C having the coating layer are preferably approximately constant, and the taking-up speed by the taking-off device 27 is as follows:
The feeding speed may be slightly faster than the feeding speed by the feeding device 21. If the take-up speed by the take-off device 27 is too high, the frictional resistance between the cylindrical fabric A and the mandrel tip 9 and the expansion disk 11 will increase, which is not preferable. On the other hand, if the feeding speed of the cylindrical fabric A by the feeding device 21 is high, the cylindrical fabric A will sag, making it impossible to obtain the cylindrical fabric C having a uniform coating layer. Further, the feeding device 21 is not necessarily required, and it is also possible to advance the cylindrical fabric only by the take-up device 27.
本発明においては、前述のように、被覆層を有
する筒状布帛Ｃが拡開円盤１１で拡開されて、断
面がほゞ円形に保持された状態で内部が減圧され
ているので、合成樹脂チユーブＢは充分に筒状布
帛Ａに圧着され、大きな密着力が得られると共
に、被覆層を有する筒状布帛Ｃが、被覆層が未だ
柔らかい間に急激に折畳まれることがなく、強い
折畳みくせが形成されるのを防止することができ
るのである。 In the present invention, as described above, the cylindrical fabric C having the coating layer is expanded by the expansion disk 11 and the internal pressure is reduced while the cross section is maintained in a substantially circular shape. Tube B is sufficiently crimped onto tubular fabric A to obtain a large adhesion force, and tubular fabric C having a covering layer is not folded suddenly while the covering layer is still soft, resulting in strong folding. This can prevent the formation of curls.
また前述の従来例においては、マンドレルチツ
プよりも上方の空所７を減圧し、筒状布帛Ａの空
隙を伝つてマンドレルチツプ９の下方を減圧して
いるので、合成樹脂チユーブＢが押出された直後
において第２図に示すように急角度で内方に移行
し、前記芯体４の先端面に貼り付いたり、筒状布
帛Ａの表面に沿つて上方に吸込まれたりして損傷
する恐れがあるが、本発明においては、マンドレ
ルチツプ９より下方のみが減圧され、上方はほと
んど減圧されないので、第３図に示すように、合
成樹脂チユーブＢは滑かに径を縮小し、筒状布帛
Ａの表面に密着するのである。 In addition, in the conventional example described above, the pressure is reduced in the space 7 above the mandrel tip, and the pressure is reduced below the mandrel tip 9 through the gap in the cylindrical fabric A, so that the synthetic resin tube B is extruded. Immediately afterward, as shown in FIG. 2, it moves inward at a steep angle and may stick to the tip end surface of the core 4 or be sucked upward along the surface of the cylindrical fabric A, causing damage. However, in the present invention, the pressure is reduced only below the mandrel tip 9, and the pressure is hardly reduced above the mandrel tip 9. As shown in FIG. It adheres closely to the surface.
従つて、本発明によれば、極めて優れた消防用
等のホース及び、管路の内張り剤が得られるので
ある。 Therefore, according to the present invention, extremely excellent hoses for fire fighting, etc., and lining agents for pipes can be obtained.
第１図は、本発明の装置の一実施例を示す中央
縦断面図である。第２図は、従来例における押出
しヘツドの先端部の拡大断面図であり、第３図
は、本発明における押出しヘツドの先端部の拡大
断面図である。
Ａ……筒状布帛、Ｂ……合成樹脂チユーブ、２
……押出しヘツド、３……被覆層、７……空洞、
８……吸引部材、９……マンドレルチツプ、１０
……吸引シヤフト、１１……拡開円盤、１２……
シール部材、１３，１５……透孔、１６……吸引
口。
FIG. 1 is a central vertical sectional view showing an embodiment of the device of the present invention. FIG. 2 is an enlarged sectional view of the tip of an extrusion head in a conventional example, and FIG. 3 is an enlarged sectional view of the tip of an extrusion head in the present invention. A...Tubular fabric, B...Synthetic resin tube, 2
...Extrusion head, 3...Covering layer, 7...Cavity,
8... Suction member, 9... Mandrel tip, 10
...Suction shaft, 11... Expansion disk, 12...
Seal member, 13, 15...through hole, 16...suction port.
Claims (1)
させつつ押出しヘツド内を通過せしめ、該押出し
ヘツドの先端部において、前記筒状布帛内に、該
筒状布帛の内径にほゞ等しいか又はそれよりやゝ
小さい外径の円筒状のマンドレルチツプを挿入し
て筒状布帛を円筒状に保持し、該円筒状の筒状布
帛の外方において、前記押出しヘツドから前記筒
状布帛の外径にほゞ等しいか又はそれよりやゝ大
きい内径の熱可塑性合成樹脂チユーブを押出し、
前記マンドレルチツプより下方の筒状布帛を内側
から数箇所において間欠的に支持して断面をほゞ
円形に保持しつつ、当該支持部分の間において筒
状布帛内を減圧することにより、前記熱可塑性合
成樹脂チユーブを前記筒状布帛の外面に密着被覆
させることを特徴とする、筒状布帛の外面に気密
性の被覆層を形成する方法。 ２ 下方に向かつて円筒状の熱可塑性合成樹脂チ
ユーブを押出すことができ、且つその中心軸に沿
つて空洞を形成した押出しヘツドと、該押出しヘ
ツドの先端部の空洞内に、前記押出しヘツドとの
間に筒状布帛が通過し得る間〓を置いて支持され
たマンドレルチツプと、該マンドレルチツプを貫
いて上下に延びる吸引シヤフトと、前記マンドレ
ルチツプの下方において前記吸引シヤフトに固定
して設けられた、前記マンドレルチツプと同径の
複数の拡開円盤と、前記吸引シヤフトの上端に設
けられた、前記マンドレルチツプと同径の二個の
シール部材と、前記シール部材間を減圧する吸引
部材とよりなり、前記吸引シヤフトは管状であつ
て、前記シール部材間の部分並びに前記マンドレ
ルチツプと拡開円盤との間及び前記拡開円盤間の
部分には、管内に通じる透孔が形成されており、
前記筒状布帛を前記シール部材、マンドレルチツ
プ及び拡開円盤により断面略円形に膨らませつ
つ、前記押出しヘツドの空洞内を一定の速度で通
過せしめ、前記押出しヘツドの先端において、そ
の外周部において前記押出しヘツドから円筒状の
熱可塑性合成樹脂チユーブを押出し、前記拡開円
盤間の空気を前記吸引シヤフトを介して吸引部材
で吸引して減圧し、その減圧により前記合成樹脂
チユーブを筒状布帛の外面に被覆するようにした
ことを特徴とする、筒状布帛の外面に気密性の被
覆層を形成する装置。[Scope of Claims] 1. A cylindrical fabric is caused to pass through an extrusion head while advancing from above to below at a constant speed, and at the tip of the extrusion head, the inner diameter of the cylindrical fabric is inside the cylindrical fabric. A cylindrical mandrel tip having an outer diameter approximately equal to or slightly smaller than is inserted to hold the cylindrical fabric in a cylindrical shape, and from the extrusion head to the outer side of the cylindrical fabric. extruding a thermoplastic synthetic resin tube with an inner diameter approximately equal to or slightly larger than the outer diameter of the cylindrical fabric;
By intermittently supporting the cylindrical fabric below the mandrel tip from the inside at several locations to maintain a substantially circular cross section, and reducing the pressure inside the cylindrical fabric between the supported portions, the thermoplastic A method for forming an airtight coating layer on the outer surface of a cylindrical fabric, the method comprising closely covering the outer surface of the cylindrical fabric with a synthetic resin tube. 2. An extrusion head capable of extruding a cylindrical thermoplastic synthetic resin tube in a downward direction and having a cavity formed along its central axis; a mandrel chip supported with a space therebetween through which a cylindrical fabric can pass; a suction shaft extending vertically through the mandrel chip; and a suction shaft fixed to the suction shaft below the mandrel chip. Further, a plurality of expansion disks having the same diameter as the mandrel tip, two seal members having the same diameter as the mandrel tip and provided at the upper end of the suction shaft, and a suction member for reducing pressure between the seal members. The suction shaft has a tubular shape, and a through hole communicating with the inside of the tube is formed in a portion between the sealing members, between the mandrel tip and the expansion disk, and in a portion between the expansion disks. ,
The cylindrical fabric is inflated into a substantially circular cross section by the sealing member, mandrel tip, and expanding disc, and is passed through the cavity of the extrusion head at a constant speed, so that the extrusion is carried out at the outer periphery at the tip of the extrusion head. A cylindrical thermoplastic synthetic resin tube is extruded from the head, and the air between the expansion discs is sucked and depressurized by a suction member through the suction shaft, and the depressurization causes the synthetic resin tube to be attached to the outer surface of the cylindrical fabric. 1. An apparatus for forming an airtight coating layer on the outer surface of a cylindrical fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175597A JPS6064823A (en) | 1983-09-21 | 1983-09-21 | Method and apparatus for forming airtight covering layer on outer surface of cylindrical fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175597A JPS6064823A (en) | 1983-09-21 | 1983-09-21 | Method and apparatus for forming airtight covering layer on outer surface of cylindrical fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6064823A JPS6064823A (en) | 1985-04-13 |
| JPH0357847B2 true JPH0357847B2 (en) | 1991-09-03 |
Family
ID=15998865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58175597A Granted JPS6064823A (en) | 1983-09-21 | 1983-09-21 | Method and apparatus for forming airtight covering layer on outer surface of cylindrical fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6064823A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5559933A (en) * | 1978-10-30 | 1980-05-06 | Idemitsu Kosan Co Ltd | Coating of member |
-
1983
- 1983-09-21 JP JP58175597A patent/JPS6064823A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5559933A (en) * | 1978-10-30 | 1980-05-06 | Idemitsu Kosan Co Ltd | Coating of member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6064823A (en) | 1985-04-13 |
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