JPS63224924A - Molding method and device for tubular body - Google Patents
Molding method and device for tubular bodyInfo
- Publication number
- JPS63224924A JPS63224924A JP5796387A JP5796387A JPS63224924A JP S63224924 A JPS63224924 A JP S63224924A JP 5796387 A JP5796387 A JP 5796387A JP 5796387 A JP5796387 A JP 5796387A JP S63224924 A JPS63224924 A JP S63224924A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- tubular body
- strip
- strips
- roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000465 moulding Methods 0.000 title description 8
- 239000004831 Hot glue Substances 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims description 25
- 230000001070 adhesive effect Effects 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 206010008631 Cholera Diseases 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 1
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、可撓性の帯状体を複数層に重合接着して管状
体に連続成形する方法及びその装置に関し、特に耐圧性
に優れた管状体の連続成形方法及びその装置に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method and an apparatus for continuously forming a flexible band-like body into a tubular body by polymerizing and adhering multiple layers. The present invention relates to a method for continuously forming a tubular body and an apparatus therefor.
（従来の技術）
従来、この種のものとして特公昭６０−３５２５４号公
報で提案された管状体の成形方法が知られている。(Prior Art) Conventionally, a method of forming a tubular body proposed in Japanese Patent Publication No. 60-35254 is known as this type of method.
この方法にあっては、可撓性の複数の帯状体を、それら
の側縁が階段状になるように互に側方にずらして重合し
、こうして重ねた帯状体を初めにそれらの両側縁の中間
に位置する狭い幅の領域においてのみ接着し、これら帯
状体を同時にマンドレルの周囲に沿って次第に曲げて管
状となすと共に重合する帯状体の前記接着領域の幅を両
側縁が接合するまで両側縁に向って次第に増大し、次い
で互いに位置がずれている帯状体の前記両側縁を接合し
て完全な管状体に形成するものである。In this method, a plurality of flexible strips are stacked while being shifted laterally so that their side edges are stepped, and the stacked strips are first stacked on both sides of the strips. These strips are simultaneously gradually bent around the mandrel to form a tubular shape and polymerized. The two side edges of the band-shaped body, which gradually increase in size toward the edge and which are offset from each other, are then joined to form a complete tubular body.
このようにして、管状体を形成する際に、接着領域を次
第に拡大して成形することは、各帯状体の接着領域にし
わなどが生じるのを防止することができる点で優れてい
る。In this way, when forming a tubular body, the adhesive area is gradually expanded and molded, which is advantageous in that it is possible to prevent wrinkles from forming in the adhesive area of each strip.
また、次第に接着領域を拡大する際に、用いる接着剤が
水溶性の接着剤であるときには、接着したのち比較的に
長い間、接着剤が液状であるため、接着された各帯状体
の間で互にずれることができるので、次第に接着領域を
拡大するとしても、接着作業にさほどの配慮をする必要
がない。In addition, when the adhesive used is a water-soluble adhesive when gradually expanding the bonded area, the adhesive remains liquid for a relatively long time after bonding, so the bonding area between the bonded strips remains Since they can be shifted from each other, even if the bonding area is gradually expanded, there is no need to pay much attention to the bonding work.
しかし、このような水溶性の接着剤を用いる時には、接
着剤が乾燥するまでに長時間を必要とする。However, when such a water-soluble adhesive is used, it takes a long time for the adhesive to dry.
また、成形された管状体を液体を収容する容器に用いる
時に、その最内層や最外層に防水層を設ける必要があり
その場合には接着剤の乾燥がきわめて困難となる。この
ような場合に、乾燥を必要としないホットメルト接着剤
を用いることが好ましい。Further, when the molded tubular body is used as a container for storing liquid, it is necessary to provide a waterproof layer on the innermost layer or outermost layer, and in this case, it becomes extremely difficult to dry the adhesive. In such cases, it is preferable to use a hot melt adhesive that does not require drying.
しかしながら、このような成形方法に接着剤としてホッ
トメルト接着剤を用いる時には、帯状体が接着すると同
時に各帯状体が強固に固定されてしまうために、一度、
部分的にでも接着の際に各帯状体において均一な接着が
行われないと、各帯状体の間にしわが生じ、未接着部分
が発生し、管状体の耐圧強度を低下させるため、単に接
着領域を次第に拡大するだけでは、高品質の管状体を形
成することはできない。However, when hot melt adhesive is used as an adhesive in such a molding method, each strip is firmly fixed at the same time as the strips are bonded.
If uniform adhesion is not performed on each strip even partially, wrinkles will occur between each strip, resulting in unbonded areas and reducing the pressure resistance of the tubular body. It is not possible to form a high-quality tubular body simply by gradually expanding the size of the tube.
（解決しようとする問題点）
本発明は、かかる従来の不都合を解消し、ホットメルト
接着剤を用いて管状体に形成する各帯状体を均一に接着
して耐圧強度に優れた管状体を製造する連続成形方法及
びその装置を提供することを目的とする。(Problems to be Solved) The present invention eliminates such conventional inconveniences, and manufactures a tubular body with excellent pressure resistance by uniformly bonding each band formed into a tubular body using a hot melt adhesive. The purpose of the present invention is to provide a continuous molding method and apparatus for the same.
（問題点を解決するための手段）
本発明の第１発明は、かかる目的を達成するために、可
撓性材料からなる複数の長尺帯状体を、それらの側縁が
階段状になるように互に位置をずらして′重合して供給
し、マンドレルに沿って次第に曲げ前記帯状体の間に介
在させた接着剤により接着して管状体に形成すると共に
互にずれている両側縁を接合して完全な管状体に形成す
る方法において、少なくとも片面に溶融状態のホットメ
ルト接着剤を備えた複数の長尺帯状体を互に間隔を存し
て長手方向に張力を与えて連続供給する工程と、各帯状
体の間隔を互に接着する直前まで保持し、最内の帯状体
の両側縁の中間位置において該帯状体の長手方向に配設
したマンドレルに前記帯状体を押圧する力を該マンドレ
ルの周方向に連続して線状に転移させて管状体に形成す
る工程とからなることを特徴とする特本発明の第２発明
は、可撓性材料からなる複数の長尺帯状体を、それらの
側縁が階段状になるように互に位置をずらして重合して
供給し、マンドレルに沿って次第に曲げて前記帯状体の
間に介在させた接着剤により接着して管状体に形成する
と共に互にずれている両側縁を接合して完全な管状体に
形成する装置において、少なくとも片面に溶融状態のホ
ットメルト接着剤を備えた複数の長尺帯状体を互に間隔
を存して長手方向に張力を与えて連続供給する装置と、
最内の帯状体の両側縁の中間位置において該帯状体の長
手方向に配設したマンドレルと、該マンドレルの外周面
に沿った形状の複数のローラをマンドレルの長手方向に
位置をずらし且つこれらの１つのローラを基準としてマ
ンドレルの周方向に互に位置を一部重合させて連続して
全周にわたり配設すると共に各ローラで前記帯状体をマ
ンドレルに圧接する装置と、前記帯状体のホットメルト
接着剤を少なくとも前記ローラ群に到達するときまでに
溶融状態に加熱保持する装置とからなることを特徴とす
る。(Means for Solving the Problems) In order to achieve the above object, the first aspect of the present invention is to provide a plurality of elongated strips made of a flexible material so that the side edges thereof are stepped. The strips are polymerized and supplied at different positions, and then gradually bent along the mandrel and bonded with an adhesive interposed between the strips to form a tubular body, and the edges on both sides which are shifted from each other are joined. in a method of forming a complete tubular body by continuously supplying a plurality of elongated strips having a molten hot melt adhesive on at least one side while applying tension in the longitudinal direction at intervals from each other. The spacing between the strips is maintained until just before they are bonded to each other, and a force is applied to press the strips against a mandrel disposed in the longitudinal direction of the innermost strip at a midpoint between both edges of the innermost strip. A second aspect of the present invention is characterized in that it comprises a step of forming a tubular body by continuous linear transfer in the circumferential direction of a mandrel. , the side edges of the strips are staggered and superimposed, and then gradually bent along the mandrel and bonded with an adhesive interposed between the strips to form a tubular body. In this apparatus, a plurality of elongated strips each having a hot melt adhesive in a molten state on at least one side are spaced apart from each other in an apparatus for forming a complete tubular body by joining the two side edges which are offset from each other. A device that applies tension in the longitudinal direction and continuously supplies the material;
A mandrel disposed in the longitudinal direction of the innermost strip at an intermediate position between both side edges of the innermost strip and a plurality of rollers shaped along the outer peripheral surface of the mandrel are shifted in the longitudinal direction of the mandrel and A device for continuously arranging the belt-shaped body over the entire circumference of the mandrel with one roller as a reference, partially overlapping each other in the circumferential direction of the mandrel, and pressing the belt-shaped body against the mandrel with each roller; and a hot melting device for the belt-shaped body. and a device that heats and maintains the adhesive in a molten state at least until it reaches the roller group.
本発明で用いる可撓性の帯状体は、紙、プラスッチク金
属箔などの材料からなる。また、これらの材料を組み合
わせて用いてもよい。特に、重合される帯状体の最内層
及び最外層が防水処理されたものであるときに本発明は
好適である。The flexible strip used in the present invention is made of a material such as paper or plastic metal foil. Moreover, you may use these materials in combination. In particular, the present invention is suitable when the innermost and outermost layers of the strip to be polymerized are waterproofed.
該帯状体は、連続した長尺のシート材からなり、形成さ
れた管状体は、適宜、所定の寸法に裁断されて用いる。The belt-shaped body is made of a continuous long sheet material, and the formed tubular body is appropriately cut into predetermined dimensions for use.
本発明で用いるホットメルト接着剤は、公知の常用のも
のであってよ（、ポリエチレン単体、エチレン及びエチ
レン共重合体、エチレン酢酸ビニル共重合体、エチレン
メチルメタアクリレート共重合体、エチレンエチルアク
リレート共重合体、エチレンメチルアクリレート共重合
体、エチレンエチルアクリレート無水マレイン酸共重合
体、エチレンアクリル酸共重合体、エチレンメタアクリ
ル酸共重合体、アイオノマー樹脂、ポリアミド系樹脂、
ポリエステル系樹脂、ナイロン系樹脂、ポリプロピレン
系樹脂、酢酸ビニル共重合体系樹脂、ポリメチルメタク
リート系樹脂などの単独または混合したものを用いる。The hot melt adhesive used in the present invention may be a known and commonly used adhesive (polyethylene alone, ethylene and ethylene copolymer, ethylene vinyl acetate copolymer, ethylene methyl methacrylate copolymer, ethylene ethyl acrylate copolymer, etc.). Polymer, ethylene methyl acrylate copolymer, ethylene ethyl acrylate maleic anhydride copolymer, ethylene acrylic acid copolymer, ethylene methacrylic acid copolymer, ionomer resin, polyamide resin,
Polyester resins, nylon resins, polypropylene resins, vinyl acetate copolymer resins, polymethyl methacrylate resins, and the like may be used alone or in combination.
帯状体の少なくとも片面にホットメルト接着剤を塗布形
成して用いる。中間の層を構成する帯状体には、両面に
ホットメルト接着剤を塗布形成してもよい。このホット
メルト接着剤は、予め帯状体に塗布形成しておき、管状
体を成形する工程の直前で再加熱して溶融状態としても
、また、管状体を成形する際に、溶融状態のホットメル
ト接着剤を塗布形成してもよい。このホットメルト接着
剤が、管状体の成形工程まで溶融状態を維持するように
加熱しておく必要がある。A hot melt adhesive is applied and formed on at least one side of the strip. A hot melt adhesive may be applied to both surfaces of the strip forming the intermediate layer. This hot melt adhesive can be applied to a strip in advance and reheated just before the step of forming a tubular object to melt it, or it can be used to melt the hot melt adhesive when forming a tubular object. It may be formed by applying an adhesive. It is necessary to heat this hot melt adhesive so that it remains molten until the process of forming the tubular body.
この溶融状態のホットメルト接着剤を備えた複数の帯状
体を、これらの側縁が階段状になるように互に位置をず
らし且つ互に間隔を与えて重合させた状態とし、各帯状
体に長手方向に張力を与えて連続して供給する。このよ
うな張力を与えて連続供給する時には、管状体に成形す
る直前まで各帯状体の間隔を保持するのに役立つ。A plurality of strips provided with the molten hot-melt adhesive are stacked at different positions and spaced from each other so that their side edges become step-like, and each strip is Continuously feed by applying tension in the longitudinal direction. When continuously supplied under such tension, it helps to maintain the spacing between the strips until just before they are formed into a tubular body.
このように連続供給される帯状体の最内層の両側縁の中
間位置に、その長手方向に管状体の形状を規定する外形
を備えたマンドレルを配設し、これに、帯状体を、その
周面に沿って曲げて管状体に成形する。この際、マンド
レルに沿って折り曲げるために帯状体に加える押圧力を
、該マンドレルの周方向に連続して線状に転移させてマ
ンドレルの全周にわたり与えて、帯状体を管状体に成形
することが重要である。A mandrel having an outer shape that defines the shape of the tubular body in the longitudinal direction is disposed at the intermediate position between both edges of the innermost layer of the strip-shaped body that is continuously supplied in this way, and the strip-shaped body is Bend it along the plane and form it into a tubular body. At this time, the pressing force applied to the band-shaped body for bending along the mandrel is continuously transferred linearly in the circumferential direction of the mandrel and applied over the entire circumference of the mandrel, thereby forming the band-shaped body into a tubular body. is important.
（作用）
本発明は、各帯状体に塗布形成したホットメルト接着剤
を各帯状体が接着されるまで溶融状態に保持し、また、
各帯状体に、その長手方向に張力を与えて各帯状体が接
着される直前まで互に間隔を保持するようにして、最内
層の長手方向に配設したマンドレルに各帯状体を押圧す
る力を該マンドレルの周方向に連続して線状に転移させ
て加えて管状体に成形するので、各帯状体が接着される
領域は帯状体のある横断位置でみれば、帯状体の進行に
従って次第に全幅に拡大する一方、帯状体の長手方向で
みるときには、マンドレルのある周面位置から全周面に
向かって次第に拡大するため、接着されていない各帯状
体の領域が各帯状体の幅方向に向って、また、帯状体の
長手方向にマンドレルのある周面位置から全周面に向か
って次第に減少し、その間、接着領域から自由である。(Function) The present invention maintains the hot melt adhesive applied to each strip in a molten state until each strip is bonded, and
A force that applies tension to each strip in the longitudinal direction and maintains the distance from each other until just before the strips are bonded, and then presses each strip against a mandrel arranged in the longitudinal direction of the innermost layer. is continuously transferred linearly in the circumferential direction of the mandrel and formed into a tubular body, so that the area where each strip is bonded gradually increases as the strip progresses, as seen from the transverse position of the strip. When viewed in the longitudinal direction of the strip, it gradually expands from the circumference position of the mandrel toward the entire circumference, so that the area of each strip that is not bonded extends in the width direction of each strip. On the other hand, it also decreases gradually in the longitudinal direction of the strip from a certain circumferential position of the mandrel towards the entire circumferential surface, during which it is free from the adhesive area.
そして、この押圧力により押圧領域がマンドレルの周方
向に転移していくときに各帯状体に生じるしわなどをそ
の側縁に逃がしながら各帯状体を接着する。Then, each strip is bonded while the wrinkles and the like that occur on each strip when the pressing area is shifted in the circumferential direction of the mandrel due to this pressing force are released to the side edges thereof.
このような接着は、マンドレルの外周面に沿った形状の
複数のローラをマンドレルの長手方向に位置をずらし且
つこれらの１つのローラを基準としてマンドレルの周方
向に互に位置を一部重合させ連続して全周にわたり配設
すると共に各ローラを帯状体を介してマンドレルに圧接
することにより可能である。特に、成形する管状体が断
面円形乃至楕円形状であり、従って、マンドレルの断面
形状が円形乃至楕円であり、各ローラの圧接面をマンド
レルの外周面に沿う円弧面とし、そして、各ローラの回
転軸をマンドレルの軸線と直交させて設け、該円弧面中
間位置をもってマンドレルに前記帯状体を介して圧接す
ることにより有効に行われる。Such adhesion is achieved by shifting the positions of a plurality of rollers shaped along the outer peripheral surface of the mandrel in the longitudinal direction of the mandrel and partially overlapping each other in the circumferential direction of the mandrel with one roller as a reference. This is possible by arranging the rollers over the entire circumference and pressing each roller against the mandrel via a strip. In particular, the tubular body to be molded has a circular or elliptical cross section, the mandrel has a circular or elliptical cross section, the pressing surface of each roller is an arcuate surface along the outer peripheral surface of the mandrel, and the rotation of each roller This is effectively carried out by providing a shaft perpendicular to the axis of the mandrel and pressing the mandrel at an intermediate position of the arcuate surface through the band-shaped body.
（実施例）
本発明の実施の一例を示す図面に従って更に詳説すれば
次の通りである。(Example) A more detailed explanation will be given below with reference to the drawings showing an example of implementation of the present invention.
第１図及び第２図は、本発明の成形方法を実施する実施
装置の一例の概略図である。1 and 2 are schematic diagrams of an example of an implementation apparatus for implementing the molding method of the present invention.
Ａは４枚の紙製帯状体１を連続して繰り出す繰出装置、
Ｂは繰り出された各帯状体１を加熱して均一に乾燥する
予備加熱装置、Ｃは各帯状体１を、これらの各側縁が階
段状になるように互に位置をずらし重合するように位置
決めする位置決め装置、Ｄは各帯状体ｌにホットメルト
接着剤を塗布形成する接着剤塗布装置、Ｅは各帯状体１
に塗布された接着剤を溶融状態に保つための加熱手段を
備えた加熱装置、Ｆはマンドレルに各帯状体を沿わせて
曲げて管状体に形成する成形装置、Ｇは成形された管状
体を引き出す引出装置、Ｈは引き出された管状体を適宜
な長さに切断する切断装置である。A is a feeding device that continuously feeds out four paper strips 1;
B is a preheating device that heats and uniformly dries each of the strips 1 that have been fed out, and C is a preheating device that heats each of the strips 1 that have been fed out and dries them uniformly; D is a positioning device for positioning, D is an adhesive application device for applying hot melt adhesive to each strip 1, and E is a positioning device for each strip 1.
F is a heating device equipped with a heating means to keep the adhesive applied to the adhesive in a molten state; F is a forming device that bends each strip along a mandrel to form a tubular body; A drawing device H is a cutting device that cuts the drawn tubular body into an appropriate length.
各帯状体１は、成形したのちの供出装置Ｇにより成形装
置Ｆに到達するまでその長手方向に張力を加えられてい
る。After each strip 1 is shaped, tension is applied in its longitudinal direction by the dispensing device G until it reaches the shaping device F.
第３図は、前記加熱装置Ｅを示し、ヒータを内蔵したノ
ズル２から加熱された空気を各帯状体１の間隙に噴射さ
せて、各帯状体１に塗布されたホットメルト接着剤を溶
融状態に保つ、そして、第４図示のように成形装置Ｆで
曲げられて成形される各帯状体１のホットメルト接着剤
が、接着される直前に確実に溶融された状態にあるよう
に複数のノズル２を設けた。FIG. 3 shows the heating device E, which injects heated air from a nozzle 2 containing a heater into the gap between each strip 1 to melt the hot melt adhesive applied to each strip 1. And as shown in the fourth figure, a plurality of nozzles are used to ensure that the hot melt adhesive of each strip 1 to be bent and formed by the forming device F is in a melted state immediately before being bonded. 2 was established.
第５図及び第６図は、成形装置Ｆを示し、連続供給され
る各帯状体（図示しない）の最内層に位置する帯状体の
両側縁の中間位置に、該帯状体の長手方向に延び、前記
引出装置Ｇ及び前記切断装置Ｈまで延びる断面円形状の
マンドレル３を備える。5 and 6 show a forming apparatus F, in which a molding device F is provided which extends in the longitudinal direction of each continuously supplied strip (not shown) at an intermediate position between both side edges of the strip located in the innermost layer of the strip. , a mandrel 3 having a circular cross section and extending to the drawing device G and the cutting device H.
該マンドレル３の周囲には各帯状体を該マンドレル３の
外周面に沿って曲げて管状体に成形するための複数のロ
ーラ４〜１５を帯状体の進行方向に位置をずらして備え
る。該ローラ４〜１５は、基本的にいずれもマンドレル
３の外周面の周方向の形状の一部に対応した円弧状面を
有し、その回転軸を、いずれもマンドレル３の軸線に対
して直交して配設した。Around the mandrel 3, a plurality of rollers 4 to 15 are provided with positions shifted in the direction of movement of the belt-like bodies for bending each belt-like body along the outer peripheral surface of the mandrel 3 and forming it into a tubular body. Each of the rollers 4 to 15 basically has an arcuate surface corresponding to a part of the circumferential shape of the outer peripheral surface of the mandrel 3, and each of the rollers has a rotation axis perpendicular to the axis of the mandrel 3. and installed it.
そして、該ローラ４〜１５は、第６図及びローラの配置
を略図する第７図に示すように、帯状体をマンドレル３
に最初に圧接するローラ４を最内層の帯状体１ａの両側
縁の中間位置に対応させて設けた。そして、該ローラ４
の下流にあるローラ５．６をマンドレル３の両局方向に
それぞれの圧接面がローラ４の圧接面の一部に重合する
位置に設けた。また、該ローラ５．６の下流にあるロー
ラ７を該ローラ５と、また、ローラ８を該ローラ６とそ
れぞれの圧接面が互の一部で重合するように設けた。更
に、該ローラ７．８の下流にあるローラ９をローラ７と
、また、ローラ１０をローラ８と、それぞれの圧接面が
互に一部で重合するように設け、他のローラ１１〜１５
も同様にして設け、各ローラ、４〜１５に圧接面がマン
ドレル３の全周にわたるように設けた。The rollers 4 to 15 move the strip onto the mandrel, as shown in FIG. 6 and FIG. 7, which schematically shows the arrangement of the rollers.
A roller 4 that first comes into pressure contact with the innermost layer strip 1a was provided at a position midway between both side edges of the innermost layer strip 1a. Then, the roller 4
Rollers 5 and 6 located downstream of the mandrel 3 were provided in both directions of the mandrel 3 at positions where their respective pressing surfaces overlapped with a portion of the pressing surface of the roller 4. Furthermore, a roller 7 downstream of the roller 5.6 was provided so that the pressure contact surfaces of the roller 5 and the roller 8 overlapped with the roller 6 at a portion of each other. Further, a roller 9 downstream of the roller 7.8 is provided with the roller 7, and a roller 10 with the roller 8 are provided so that their pressure contact surfaces partially overlap each other, and the other rollers 11 to 15
The rollers 4 to 15 were provided in the same manner so that the pressure contact surfaces of the rollers 4 to 15 covered the entire circumference of the mandrel 3.
各ローラ４〜１５は、各円弧状の圧接面の中央をマンド
レル３に向かって圧接するシリンダ１６〜２７を備える
。２８は、成形装置Ｆで成形された管状体を支持案内す
る支持ローラである。Each of the rollers 4 to 15 includes cylinders 16 to 27 that press the center of each arc-shaped pressing surface toward the mandrel 3. 28 is a support roller that supports and guides the tubular body molded by the molding device F.
このように構成するときには、前記ローラ４〜１５は、
ローラ４を基準としてマンドレル３に各帯状体を押圧す
る力を該マンドレル３の周方向に連続して線状に転移さ
せて加えることが可能となる。When configured in this way, the rollers 4 to 15 are
With the roller 4 as a reference, it is possible to apply a force that presses each strip to the mandrel 3 in a continuous linear manner in the circumferential direction of the mandrel 3.
更に、管状体の成形の過程を第７図に従って説明する。Furthermore, the process of forming the tubular body will be explained with reference to FIG.
まず、第７図（Ａ）示のように、各帯状体１は、ローラ
４によりマンドレル３に圧接されて介在するホットメル
ト接着剤により重合接着される。このとき、ローラ４の
圧接面の中心領域４ａの押圧力が最大であり、該圧接面
の側縁に向かって押圧力は弱くなる。従って、中心領域
４ａでは各帯状体ｌは強固に接着され側縁に向かって接
着が次第に不十分となる。First, as shown in FIG. 7(A), each strip 1 is pressed against a mandrel 3 by a roller 4 and polymerized and bonded with an intervening hot melt adhesive. At this time, the pressing force in the central region 4a of the pressing surface of the roller 4 is maximum, and the pressing force becomes weaker toward the side edges of the pressing surface. Therefore, in the central region 4a, each strip 1 is firmly adhered, but the adhesion gradually becomes insufficient toward the side edges.
次いで、第７図ＣＢ）示のように、各帯状体１は、前記
ローラ４で接着された部分以外は互に間隔を保持しなが
ら、ローラ５．６により押圧されて接着領域を拡大する
。このときに、ローラ５．６は、その圧接面の中心領域
５ａ、６ａがマンドレル３の両局方向にずれているので
、前記ローラ４で接着が不十分であった領域を完全に接
着させながら接着領域を拡大する。同様にして第７図（
Ｃ）〜（Ｅ）示のように、ローラ８〜１２により次第に
各帯状体１の両側縁に向かって押圧力を線状に転移させ
て各帯状体ｌを曲げてマンドレル３に沿う形状に成形す
る。Next, as shown in FIG. 7CB), each strip 1 is pressed by a roller 5.6 to enlarge the bonded area while maintaining a distance from each other except for the portion bonded by the roller 4. At this time, since the central areas 5a and 6a of the pressing surfaces of the rollers 5.6 are shifted in the direction of both sides of the mandrel 3, the rollers 4 are able to completely adhere the areas where the adhesion was insufficient. Expand the adhesive area. Similarly, Figure 7 (
As shown in C) to (E), the rollers 8 to 12 gradually linearly transfer the pressing force toward both side edges of each strip 1 to bend each strip 1 and form it into a shape along the mandrel 3. do.
このとき、ローラ１１で各帯状体１の一側縁側を他側縁
より早くマンドレル３に当接するように折り曲げ、その
後、第７図（Ｆ）〜（Ｈ）示のように、ローラ１３〜１
５により他側縁を重合して接着し完全に接着された管状
体を成形する。At this time, one side edge of each strip 1 is bent by the roller 11 so as to contact the mandrel 3 earlier than the other side edge, and then, as shown in FIGS. 7(F) to (H), the rollers 13 to 1
5, the other side edge is overlapped and bonded to form a completely bonded tubular body.
（効果）
本発明によれば、少なくとも片面に溶融状態のホントメ
ルト接着剤を備えた複数の長尺帯状体を、その最内層の
帯状体の両側縁の中間位置に該帯状体の長手方向に設け
たマンドレルに沿って次第に曲げて互に接着して管状体
を成形するときに、該帯状体をその長手方向に張力を与
えて互に間隔を保持して連続供給し、また、ホットメル
ト接着剤を接着位置までその溶融状態を保持し、各帯状
体の接着領域を次第に拡大しながら接着するにあたり、
マンドレルに帯状体を押圧する力を該マンドレルの周方
向に連続して転移させて加えることにより、ホットメル
ト接着剤を用いても支障なく管状体を成形することがで
き、各帯状体が均一に接着された耐圧強度に優れた管状
体を得ることができる。(Effects) According to the present invention, a plurality of elongated strips each having a molten true-melt adhesive on at least one side are placed in the middle of both side edges of the innermost layer of the strip in the longitudinal direction of the strip. When forming a tubular body by gradually bending it along a provided mandrel and adhering it to each other, tension is applied to the belt-shaped body in its longitudinal direction to maintain a distance from each other and the belt-shaped body is continuously fed, and hot-melt adhesive is also used. The adhesive is maintained in a molten state until the bonding position is reached, and the bonding area of each strip is gradually expanded while bonding.
By applying the force that presses the strip onto the mandrel by continuously transferring it in the circumferential direction of the mandrel, it is possible to form the tubular body without any trouble even using hot melt adhesive, and each strip can be formed uniformly. A bonded tubular body with excellent pressure resistance can be obtained.
また、マンドレルの外周面に沿った形状の複数のローラ
をマンドレルの長手方向に位置をずらし且つコレラの１
つのローラを基準としてマンドレルの周方向に互に位置
を一部重合させて連続して全周にわたり配設すると共に
各ローラを前記帯状体を介してマンドレルに圧接する装
置を用いることにより、ホットメルト接着剤で各帯状体
を均一に接着した管状体を成形することができる。In addition, a plurality of rollers shaped along the outer peripheral surface of the mandrel are shifted in the longitudinal direction of the mandrel, and the cholera
By using a device in which two rollers are arranged continuously over the entire circumference of the mandrel in a manner that partially overlaps each other in the circumferential direction of the mandrel, and each roller is pressed against the mandrel through the strip, the hot melt A tubular body can be formed by uniformly bonding each strip with adhesive.
【図面の簡単な説明】
第１図乃至第７図は、本発明の実施の一例を示すもので
、第１図はその平面図、第２図は正面図、第３図は加熱
装置の平面図、第４図は加熱装置によるホットメルト接
着剤の加熱工程を説明するための線図、第５図は成形装
置の正面図、第６図は第５図のＶｌ−ＶＩ線断面図、第
７図は成形工程を説明するための線図である。
１・・・帯状体 ３・・・マンドレル４〜１５・
・・ローラ[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 to Fig. 7 show an example of the implementation of the present invention, in which Fig. 1 is a plan view thereof, Fig. 2 is a front view, and Fig. 3 is a plan view of the heating device. Figure 4 is a diagram for explaining the heating process of hot melt adhesive by a heating device, Figure 5 is a front view of the molding device, Figure 6 is a sectional view taken along the line Vl-VI in Figure 5, FIG. 7 is a diagram for explaining the molding process. 1... Band-shaped body 3... Mandrel 4-15.
··roller
Claims (1)
側縁が階段状になるように互に位置をずらして重合して
供給し、マンドレルに沿って次第に曲げ前記帯状体の間
に介在させた接着剤により接着して管状体に形成すると
共に互にずれている両側縁を接合して完全な管状体に形
成する方法において、少なくとも片面に溶融状態のホッ
トメルト接着剤を備えた複数の長尺帯状体を互に間隔を
存して長手方向に張力を与えて連続供給する工程と、各
帯状体の間隔を互に接着する直前まで保持し、最内の帯
状体の両側縁の中間位置において該帯状体の長手方向に
配設したマンドレルに前記帯状体を押圧する力を該マン
ドレルの周方向に連続して線状に転移させて管状体に形
成する工程とからなることを特徴とする管状体の成形方
法 ２、可撓性材料からなる複数の長尺帯状体を、それらの
側縁が階段状になるように互に位置をずらして重合して
供給し、マンドレルに沿って次第に曲げ前記帯状体の間
に介在させた接着剤により接着して管状体に形成すると
共に互にずれている両側縁を接合して完全な管状体に形
成する装置において、少なくとも片面に溶融状態のホッ
トメルト接着剤を備えた複数の長尺帯状体を互に間隔を
存して長手方向に張力を与えて供給する装置と、最内の
帯状体の両側縁の中間位置において該帯状体の長手方向
に配設したマンドレルと、該マンドレルの外周面に沿っ
た形状の複数のローラをマンドレルの長手方向に位置を
ずらし且つこれらの１つのローラを基準としてマンドレ
ルの周方向に互に位置を一部重合させて連続して全周に
わたり配設すると共に各ローラで前記帯状体をマンドレ
ルに圧接する装置と、前記帯状体のホットメルト接着剤
を少なくとも前記ローラ群に到達するときまでに溶融状
態に加熱保持する装置とからなることを特徴とする管状
体の成形装置 ３、前記マンドレルの断面形状が円形乃至楕円形状であ
り、前記ローラの圧接面がマンドレルの外周面に沿う円
弧面であると共に該ローラの回転軸がマンドレルの軸線
と直交するものであり、該円弧面中間位置をもってマン
ドレルに前記帯状体を圧接することを特徴とする特許請
求の範囲第２項記載の管状体の成形装置 ４、前記マンドレルと前記ローラのうち最初に帯状体を
マンドレルに圧接するローラとを、前記帯状体のうち最
内の帯状体の両側縁の中間位置に対設したことを特徴と
する特許請求の範囲第２項記載の管状体の成形装置[Claims] 1. A plurality of long strips made of flexible material are stacked and supplied with their side edges staggered so that they are gradually moved along a mandrel. In the method of bending, the band-shaped body is bonded with an adhesive interposed between the strips to form a tubular body, and the mutually offset side edges are joined to form a complete tubular body. A process of continuously supplying a plurality of long strips with melt adhesive while applying tension in the longitudinal direction at intervals, and holding the intervals between the strips until just before they are bonded to each other. Forming a tubular body by continuously linearly transferring the force that presses the strip to a mandrel disposed in the longitudinal direction of the strip in the circumferential direction of the mandrel at an intermediate position between both side edges of the strip. 2, a method for forming a tubular body characterized by comprising the steps of: a plurality of elongated strips made of a flexible material are stacked with their positions shifted from each other so that their side edges become step-like; In an apparatus for forming a tubular body by gradually bending the strip along a mandrel and gluing it with an adhesive interposed between the strips, and joining the mutually shifted side edges to form a complete tubular body. , a device for supplying a plurality of elongated strips each having a hot melt adhesive in a molten state on at least one side while applying tension in the longitudinal direction at a distance from each other; A mandrel disposed in the longitudinal direction of the strip and a plurality of rollers shaped along the outer peripheral surface of the mandrel are shifted in the longitudinal direction of the mandrel, and the circumferential direction of the mandrel is shifted with respect to one of these rollers as a reference. a device for continuously arranging the strips over the entire circumference with their positions partially overlapping each other and pressing the strips against the mandrel with each roller; and a device for applying the hot melt adhesive of the strips to at least the roller group. A device for forming a tubular body (3) characterized by comprising a device for heating and maintaining the tubular body in a molten state, wherein the mandrel has a circular or elliptical cross-sectional shape, and the pressure contact surface of the roller is along the outer circumferential surface of the mandrel. The tubular body according to claim 2, wherein the roller has an arcuate surface and a rotation axis of the roller is perpendicular to the axis of the mandrel, and the strip is pressed against the mandrel at an intermediate position of the arcuate surface. The body forming device 4 is characterized in that the mandrel and the roller that first presses the strip against the mandrel are disposed opposite to each other at intermediate positions between both edges of the innermost strip among the strips. A device for forming a tubular body according to claim 2
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5796387A JPH0796262B2 (en) | 1987-03-14 | 1987-03-14 | Method and apparatus for forming tubular body |
| US07/167,863 US4875960A (en) | 1987-03-14 | 1988-03-14 | Apparatus and method for manufacturing tubular member |
| EP19880302201 EP0283229A3 (en) | 1987-03-14 | 1988-03-14 | Apparatus for manufacturing a tubular member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5796387A JPH0796262B2 (en) | 1987-03-14 | 1987-03-14 | Method and apparatus for forming tubular body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224924A true JPS63224924A (en) | 1988-09-20 |
| JPH0796262B2 JPH0796262B2 (en) | 1995-10-18 |
Family
ID=13070665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5796387A Expired - Lifetime JPH0796262B2 (en) | 1987-03-14 | 1987-03-14 | Method and apparatus for forming tubular body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796262B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493224A (en) * | 1990-08-08 | 1992-03-26 | Kido Gijutsu Kenkyusho:Kk | Manufacturing device of underground pipe |
| US20160082686A1 (en) * | 2013-04-22 | 2016-03-24 | PAKEA SASU (Société par actions simplifiée unipersonnelle) | Machine for the continuous manufacture of tubular box bodies, notably based on cardboard or the like |
-
1987
- 1987-03-14 JP JP5796387A patent/JPH0796262B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493224A (en) * | 1990-08-08 | 1992-03-26 | Kido Gijutsu Kenkyusho:Kk | Manufacturing device of underground pipe |
| US20160082686A1 (en) * | 2013-04-22 | 2016-03-24 | PAKEA SASU (Société par actions simplifiée unipersonnelle) | Machine for the continuous manufacture of tubular box bodies, notably based on cardboard or the like |
| JP2016516614A (en) * | 2013-04-22 | 2016-06-09 | パケア | Machine for continuous production of tubular box, especially based on cardboard |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0796262B2 (en) | 1995-10-18 |
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