JPH0542585A - Manufacturing device of corrugated pipe - Google Patents
Manufacturing device of corrugated pipeInfo
- Publication number
- JPH0542585A JPH0542585A JP3226579A JP22657991A JPH0542585A JP H0542585 A JPH0542585 A JP H0542585A JP 3226579 A JP3226579 A JP 3226579A JP 22657991 A JP22657991 A JP 22657991A JP H0542585 A JPH0542585 A JP H0542585A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- corrugated pipe
- spiral
- protrusion
- contact
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000465 moulding Methods 0.000 claims abstract description 85
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 229920005992 thermoplastic resin Polymers 0.000 claims description 15
- 238000000071 blow moulding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000694 effects Effects 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
- B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
- B29C49/04102—Extrusion blow-moulding extruding the material continuously
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性熱可塑性樹脂
を円筒状に押し出すと共に、キャタピラ・チェーン状に
形成される外周面成型用割型によってその外周面に螺旋
状の凹凸を成型するコルゲート管の製造装置に係り、特
に前記外周面成型用割型を構成するモールディング・ブ
ロックの耐久性が高いコルゲート管の製造装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugate in which a thermoplastic resin is extruded in a cylindrical shape, and spiral ruggedness is formed on the outer peripheral surface by a split mold for forming the outer peripheral surface formed in the shape of a caterpillar chain. The present invention relates to a pipe manufacturing apparatus, and more particularly to a corrugated pipe manufacturing apparatus in which a molding block that constitutes the outer peripheral surface molding split die has high durability.
【０００２】[0002]
【従来の技術】従来、この種のコルゲート管の製造装置
としては、特公昭６３−３７８５号公報に示されるよう
な多数の成型ブロック（モールディング・ブロック）を
連結してキャタピラ・チェーン状に形成された外周面成
型用割型を備えるものが知られている。前記コルゲート
管の製造装置は、前記外周面成型用割型に隣設された押
出成型機により管状に押し出された熱可塑性樹脂の外周
面を前記モールディング・ブロックに当接させブロー成
型することにより前記外周面に螺旋状の凹凸を成型する
ものである。2. Description of the Related Art Conventionally, as a corrugated pipe manufacturing apparatus of this type, a large number of molding blocks (molding blocks) as shown in Japanese Patent Publication No. 63-3785 are connected to form a caterpillar chain. It is known to have a split mold for molding the outer peripheral surface. The manufacturing apparatus of the corrugated pipe, by blow molding the outer peripheral surface of the thermoplastic resin extruded in a tubular shape by an extrusion molding machine provided adjacent to the outer peripheral surface molding split mold to bring the outer peripheral surface into contact with the molding block. The outer peripheral surface is formed with spiral irregularities.
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来のモー
ルディング・ブロックにはコルゲート管成型面に螺旋状
の凹部，凸部が形成されることから、図３に示すように
所定間隔で直線的に分割されると、当該分割された面
（モールディング・ブロック同士の接触端面）の端縁に
位置する上記成型面の凸部の肉厚が薄くなると共に鋭利
なものとなり、これにより装置運転中に当該凸部が欠け
たり曲がったりしてコルゲート管を所定の精度で製造で
きなくなるだけでなくモールディング・ブロック自体の
耐久性が低く寿命が短いという課題があった。However, since the conventional molding block has spiral recesses and projections formed on the corrugated pipe molding surface, it is divided linearly at predetermined intervals as shown in FIG. Then, the thickness of the convex portion of the molding surface located at the edge of the divided surface (the contact end surface between the molding blocks) becomes thin and sharp. There is a problem that the corrugated pipe cannot be manufactured with a predetermined accuracy due to a lack of a part or a bend, and the molding block itself has a low durability and a short life.
【０００４】したがって、本発明の目的は上記従来の製
造装置における諸種の課題を解決すべく発明されたもの
であって、上記モールディング・ブロックの凸部端縁の
肉厚を一定にし且つ鋭利な部分をなくして経時的変化に
よっても所定の精度でコルゲート管を製造でき、前記モ
ールディング・ブロック自体の耐久性が高く寿命の長い
コルゲート管の製造装置を提供することにある。Therefore, an object of the present invention was invented to solve various problems in the above-mentioned conventional manufacturing apparatus, in which the wall thickness of the convex edge of the molding block is constant and sharp. Accordingly, it is an object of the present invention to provide a corrugated pipe manufacturing apparatus which can manufacture a corrugated pipe with a predetermined accuracy even if it is eliminated, and has a long durability and a long life of the molding block itself.
【０００５】[0005]
【課題を解決する手段】本発明は上記に鑑み発明された
ものであって、成型面に螺旋状の凹部，凸部を備えるモ
ールディング・ブロックを当該凹部，凸部が連続するよ
うにキャタピラ・チェーン状に連設した外周面成型用割
型の２個を、相対向させて略筒状の成型部を有するコル
ゲート管の製造装置であって、前記成型部の内部に管状
の熱可塑性樹脂を押し出して当該熱可塑性樹脂の外周面
を前記螺旋状の凹部，凸部に当接させブロー成型するこ
とにより前記外周面に螺旋状の凹凸を成型するコルゲー
ト管の製造装置において、上記モールディング・ブロッ
ク同士が互いに接触し合う接触端面を前記凹部，凸部の
螺旋方向に沿うように傾斜させて形成する一方、前記凹
部，凸部とは交差する段差を形成したことを特徴とする
コルゲート管の製造装置である。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a molding block having a spiral concave portion and a convex portion on a molding surface is provided in a caterpillar chain so that the concave portion and the convex portion are continuous. An apparatus for manufacturing a corrugated pipe having two substantially cylindrical outer peripheral surface molding split dies opposed to each other and having a substantially cylindrical molding portion, wherein a tubular thermoplastic resin is extruded into the molding portion. In the corrugated pipe manufacturing apparatus for molding spiral irregularities on the outer peripheral surface by contacting the outer peripheral surface of the thermoplastic resin with the spiral concave and convex portions and blow molding the molding blocks, The corrugated pipe is manufactured by inclining contact end surfaces which are in contact with each other along the spiral direction of the concave portion and the convex portion, and forming a step intersecting with the concave portion and the convex portion. It is a device.
【０００６】ここで、上記モールディング・ブロックの
接触端面は、上記成型面にある螺旋状の凹部，凸部の螺
旋方向に沿うように傾斜を付けて形成され、これにより
螺旋状に連続して突出する凸部の接触端面付近の肉厚を
一定にするものである。なお、接触端面全てを傾斜させ
る必要はなく、少なくとも螺旋状の凹部、凸部が設けら
れている成型面端縁にある接触端面のみに傾斜を設けれ
ば前記凸部の端縁の肉厚が略一定になるのは勿論のこと
である。Here, the contact end surface of the molding block is formed so as to be inclined along the spiral direction of the spiral concave portion and the convex portion on the molding surface, so that the spiral projection continuously occurs. The thickness of the convex portion near the contact end surface is made constant. Note that it is not necessary to incline all the contact end surfaces, and at least the contact end surface at the edge of the molding surface on which the spiral concave portion and the convex portion are provided is inclined, the wall thickness of the edge of the convex portion is reduced. Of course, it will be almost constant.
【０００７】前記接触端面において前記凹部，凸部と交
差する段差は、前記接触端面を前記螺旋方向に沿わせた
だけでは永久に端面が形成されてしまうため、所定の位
置で前記凹部，凸部を区切るものである。また、当該段
差が設けられる位置は、螺旋状に突出する前記凸部の肉
厚を一定にするものであれば前記接触端面のいずれの位
置を選択してもよいが、前記モールディング・ブロック
が動かされて互いに当接・離脱される都合上、重心の位
置を鑑み前記接触端面の略中央部が好ましい。なお、当
該段差は上記モールディング・ブロックの接触面同士の
当接・離脱の際に障害とならない段差であることは勿論
である。[0007] A step which intersects the concave portion and the convex portion on the contact end surface is permanently formed only by aligning the contact end surface in the spiral direction, so that the concave portion and the convex portion are formed at predetermined positions. To separate the. The position where the step is provided may be any position on the contact end surface as long as the thickness of the protrusion protruding in a spiral shape is constant, but the molding block does not move. In consideration of the position of the center of gravity, the substantially central portion of the contact end surface is preferable for the convenience of being brought into and out of contact with each other. Needless to say, the step is a step that does not cause an obstacle when the contact surfaces of the molding blocks are brought into contact with each other or separated from each other.
【０００８】[0008]
【作用】本発明は、上記モールディング・ブロック同士
が互いに接触する接触端面を上記成型面の螺旋方向に沿
わせる一方、当該接触端面に前記螺旋方向と交差する段
差を配設し、前記成型面の凸部の肉厚を一定に形成して
いるため、装置運転時におけるモールディング・ブロッ
ク同士の当接・離脱の作用があっても前記凸部の肉厚の
薄い部分がなくなり当該モールディング・ブロックの端
部が欠けたり曲がったりしない。According to the present invention, the contact end surfaces of the molding blocks which come into contact with each other are arranged along the spiral direction of the molding surface, while the contact end surface is provided with a step which intersects with the spiral direction. Since the protrusions have a uniform thickness, even if the molding blocks are brought into contact with or separated from each other during operation of the device, the thin portions of the protrusions disappear and the ends of the molding block concerned. The part does not chip or bend.
【０００９】[0009]
【実施例】以下、本発明を図面に示す実施例に基づいて
詳細に説明する。図１は、本発明に係るコルゲート管の
製造装置の一実施例を模式的に示した説明図であり、モ
ールディング・ブロックの背後から成型面側に向かって
見た時の図である。また、図２は本発明に係るコルゲー
ト管の製造装置に用いられるモールディング・ブロック
の一実施例を示した斜視図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is an explanatory view schematically showing an embodiment of a corrugated pipe manufacturing apparatus according to the present invention, as viewed from the back of the molding block toward the molding surface side. FIG. 2 is a perspective view showing an embodiment of a molding block used in the corrugated pipe manufacturing apparatus according to the present invention.
【００１０】本実施例のコルゲート管の製造装置は、成
型面４に螺旋状の凹部５，凸部６を備えるモールディン
グ・ブロック３が前記凹部５，凸部６が連続するように
連結されてキャタピラ・チェーン状に形成された外周面
成型用割型２の２個を、相対向させて略筒状の成型部１
と、前記成型部１内部に管状の熱可塑性樹脂Ｐを押し出
す熱可塑性樹脂押出部（図示省略）と、前記熱可塑性樹
脂押出部の前部に配設される冷却部（図示省略）から主
要部が構成されるものである。In the corrugated pipe manufacturing apparatus of this embodiment, a molding block 3 having spiral recesses 5 and projections 6 on a molding surface 4 is connected so that the recesses 5 and projections 6 are continuous with each other. -Two of the split molds 2 for molding the outer peripheral surface, which are formed in a chain shape, are made to face each other and have a substantially cylindrical molding portion 1.
A thermoplastic resin extruding part (not shown) for extruding a tubular thermoplastic resin P into the molding part 1; and a cooling part (not shown) arranged in front of the thermoplastic resin extruding part Is configured.
【００１１】ここで、上記モールディング・ブロック３
は、図２に示すように、成型面４に螺旋状の凹部５，凸
部６を設け、当該モールディング・ブロック３同士が互
いに接触し合う接触端面７を前記成型面４の螺旋方向に
沿うように形成する一方、当該接触端面７に前記螺旋方
向と交差する段差８を形成したものである。Here, the molding block 3 is used.
As shown in FIG. 2, a spiral concave portion 5 and a convex portion 6 are provided on the molding surface 4, and the contact end surface 7 where the molding blocks 3 contact each other is arranged along the spiral direction of the molding surface 4. On the other hand, the contact end surface 7 is formed with a step 8 that intersects the spiral direction.
【００１２】なお、本実施例にあっては、モールディン
グ・ブロック３がキャタピラ・チェーン状に構成されて
いる点やその駆動装置などを開示していないが、従来の
コルゲート管の製造装置と同様な構成によるものである
ことから説明を省略する。In this embodiment, although the molding block 3 is formed in the shape of a caterpillar chain and its driving device is not disclosed, it is similar to the conventional corrugated pipe manufacturing device. The description is omitted because it depends on the configuration.
【００１３】以上の実施例に係るコルゲート管の製造装
置は、以下のように作用する。まず、成型部１内部にあ
る図示外の熱可塑性樹脂押出部から熱可塑性樹脂Ｐが管
状に押し出される。当該熱可塑性樹脂Ｐの外周面Ｐ１
は、当該熱可塑性樹脂Ｐの押出速度と同一に進行する外
周面成型用割型２の成型面４に当接され、前記成型面４
の螺旋状の凹部５，凸部６の形にブロー成型される。成
型された熱可塑性樹脂Ｐは図示外の冷却部によって冷却
されて安定化が図られる。The corrugated pipe manufacturing apparatus according to the above-described embodiment operates as follows. First, the thermoplastic resin P is extruded into a tubular shape from a thermoplastic resin extruding portion (not shown) inside the molding unit 1. Outer peripheral surface P1 of the thermoplastic resin P
Is brought into contact with the molding surface 4 of the split mold 2 for molding the outer peripheral surface, which advances at the same speed as the extrusion speed of the thermoplastic resin P.
It is blow-molded into the shape of the spiral concave portion 5 and convex portion 6. The molded thermoplastic resin P is cooled and stabilized by a cooling unit (not shown).
【００１４】以上のような作用において、上記外周面成
型用割型２は、成型部１の位置においては上記モールデ
ィング・ブロック３同士が互いに接触し合って直線的に
連結されるものであるが、キャタピラの折り返される地
点では当該モールディング・ブロック３同士は所定の間
隔を開けて移動させられるものであり、当該モールディ
ング・ブロック３同士の当接・離脱の作用が生じてい
る。In the above operation, in the outer peripheral surface molding split mold 2, the molding blocks 3 come into contact with each other at the position of the molding portion 1 and are linearly connected. At the point where the caterpillar is folded back, the molding blocks 3 are moved with a predetermined gap therebetween, so that the molding blocks 3 come into contact with and separate from each other.
【００１５】本実施例にあっては、上記モールディング
・ブロック同士が互いに接触する接触端面を上記成型面
の螺旋方向に沿わせる一方、当該接触端面に前記螺旋方
向と交差する段差を配設し、前記成型面の螺旋状凸部の
肉厚を一定に形成しているため、装置運転時におけるモ
ールディング・ブロック同士の当接・離脱の作用があっ
ても前記凸部端縁が欠けたり曲がったりしない。また、
前記モールディング・ブロックの接触端面の略中央部に
段差を設けており、従来のモールディング・ブロックと
同様に重心が略中央部に位置し、これにより前記モール
ディング・ブロック同士が当接・離脱されても安定的に
移動でき、装置自体も安定的な運転をすることができ
る。In this embodiment, the contact end surfaces of the molding blocks contacting each other are arranged along the spiral direction of the molding surface, while the contact end surfaces are provided with a step crossing the spiral direction. Since the thickness of the spiral convex portion of the molding surface is formed to be constant, the edge of the convex portion is not chipped or bent even when the molding blocks are brought into contact with or separated from each other during operation of the device. .. Also,
A step is provided in the substantially central portion of the contact end surface of the molding block, and the center of gravity is located in the substantially central portion as in the conventional molding block, so that even if the molding blocks are brought into contact with each other or separated from each other. It can be moved stably, and the device itself can be operated stably.
【００１６】[0016]
【発明の効果】本発明は、コルゲート管の製造装置のモ
ールディング・ブロックの接触端面を成型面にある凹
部，凸部の螺旋方向に沿って傾斜させて形成する一方、
当該接触端面に前記螺旋方向と交差する段差を形成して
いるため、装置運転時におけるモールディング・ブロッ
ク同士の当接・離脱の作用があっても前記凸部の端縁が
欠けたり曲がったりしなくなり当該モールディング・ブ
ロックが経時的変化に対して強くなり、長寿命化が図
れ、ひいては、コルゲート管の製造装置自体の高品質化
が図れるという効果を有する。According to the present invention, the contact end surface of the molding block of the corrugated pipe manufacturing apparatus is formed by inclining along the spiral direction of the concave portion and the convex portion on the molding surface.
Since a step is formed on the contact end surface that intersects the spiral direction, the edge of the convex portion will not be chipped or bent even when the molding blocks are brought into contact with each other or separated from each other during operation of the device. The molding block is resistant to changes over time, and has a long service life, which in turn has the effect of improving the quality of the corrugated pipe manufacturing apparatus itself.
【図１】本発明に係るコルゲート管の製造装置の一実施
例を模式的に示した説明図であり、モールディング・ブ
ロックの背後から成型面側に向かって見た時の説明図で
ある。FIG. 1 is an explanatory view schematically showing an embodiment of a corrugated pipe manufacturing apparatus according to the present invention, as viewed from the back of a molding block toward the molding surface side.
【図２】本発明に係るコルゲート管の製造装置に用いら
れるモールディング・ブロックの一実施例を示した斜視
図である。FIG. 2 is a perspective view showing an embodiment of a molding block used in the corrugated pipe manufacturing apparatus according to the present invention.
【図３】従来のコルゲート管の製造装置を模式的に示し
た説明図であり、モールディング・ブロックの背後から
成型面側に向かって見た時の説明図である。FIG. 3 is an explanatory diagram schematically showing a conventional corrugated pipe manufacturing apparatus, and is an explanatory diagram when viewed from the back of the molding block toward the molding surface side.
１ 成型部 ２ 外周面成型用割型 ３ モールディング・ブロック ４ 成型面 ５ 凹部 ６ 凸部 ７ 接触端面 ８ 段差 Ｐ 熱可塑性樹脂 Ｐ１ 外周面 DESCRIPTION OF SYMBOLS 1 Molding part 2 Split mold for outer peripheral surface molding 3 Molding block 4 Molding surface 5 Recessed portion 6 Protruding portion 7 Contact end surface 8 Step difference P Thermoplastic resin P1 Outer peripheral surface
Claims (1)
えるモールディング・ブロック３を当該凹部５，凸部６
が連続するようにキャタピラ・チェーン状に連設した外
周面成型用割型２の２個を、相対向させて略筒状の成型
部１を有するコルゲート管の製造装置であって、前記成
型部１の内部に管状の熱可塑性樹脂Ｐを押し出して当該
熱可塑性樹脂Ｐの外周面Ｐ１を前記螺旋状の凹部５，凸
部６に当接させブロー成型することにより前記外周面Ｐ
１に螺旋状の凹凸を成型するコルゲート管の製造装置に
おいて、上記モールディング・ブロック３同士が互いに
接触し合う接触端面７を前記凹部５，凸部６の螺旋方向
に沿うように傾斜させて形成する一方、前記凹部５，凸
部６とは交差する段差８を形成したことを特徴とするコ
ルゲート管の製造装置。1. A molding block 3 having a spiral concave portion 5 and a convex portion 6 on a molding surface 4 is provided with the concave portion 5 and the convex portion 6.
1. A corrugated pipe manufacturing apparatus having two substantially cylindrical outer peripheral surface molding split dies 2 arranged in a caterpillar chain so as to be continuous with each other and having a substantially cylindrical molding portion 1, 1. A tubular thermoplastic resin P is extruded into the inner periphery of the outer peripheral surface 1 and the outer peripheral surface P1 of the thermoplastic resin P is brought into contact with the spiral concave portions 5 and the convex portions 6 to perform blow molding.
In a corrugated pipe manufacturing apparatus for molding a spiral corrugated portion into 1, a contact end face 7 where the molding blocks 3 contact each other is formed by inclining along the spiral direction of the concave portion 5 and the convex portion 6. On the other hand, the corrugated pipe manufacturing apparatus is characterized in that a step 8 is formed so as to intersect with the concave portion 5 and the convex portion 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22657991A JP3189183B2 (en) | 1991-08-12 | 1991-08-12 | Corrugated pipe manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22657991A JP3189183B2 (en) | 1991-08-12 | 1991-08-12 | Corrugated pipe manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0542585A true JPH0542585A (en) | 1993-02-23 |
| JP3189183B2 JP3189183B2 (en) | 2001-07-16 |
Family
ID=16847384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22657991A Expired - Fee Related JP3189183B2 (en) | 1991-08-12 | 1991-08-12 | Corrugated pipe manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3189183B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001002155A1 (en) * | 1999-06-30 | 2001-01-11 | Byun Moo Won | Apparatus for producing multiple channel duct assembly and method thereof |
| JP2021133540A (en) * | 2020-02-25 | 2021-09-13 | 扶桑産業株式会社 | Cylindrical component molding apparatus, and method for manufacturing cylindrically molded component |
-
1991
- 1991-08-12 JP JP22657991A patent/JP3189183B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001002155A1 (en) * | 1999-06-30 | 2001-01-11 | Byun Moo Won | Apparatus for producing multiple channel duct assembly and method thereof |
| AU761343B2 (en) * | 1999-06-30 | 2003-06-05 | Moo-Won Byun | Apparatus for producing multiple channel duct assembly and method thereof |
| US6676881B1 (en) | 1999-06-30 | 2004-01-13 | Moo-Won Byun | Apparatus for producing multiple channel duct assembly and method thereof |
| JP2021133540A (en) * | 2020-02-25 | 2021-09-13 | 扶桑産業株式会社 | Cylindrical component molding apparatus, and method for manufacturing cylindrically molded component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3189183B2 (en) | 2001-07-16 |
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