JPH0374622B2 - - Google Patents
Info
- Publication number
- JPH0374622B2 JPH0374622B2 JP59216876A JP21687684A JPH0374622B2 JP H0374622 B2 JPH0374622 B2 JP H0374622B2 JP 59216876 A JP59216876 A JP 59216876A JP 21687684 A JP21687684 A JP 21687684A JP H0374622 B2 JPH0374622 B2 JP H0374622B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- laminated
- diameter portion
- outer periphery
- core
- 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
Links
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 15
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 15
- 241001330002 Bambuseae Species 0.000 claims description 15
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 15
- 239000011425 bamboo Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
Description
〔産業上の利用分野〕
本発明は、節目の美しい合成樹脂模造竹筒の製
造法に関するものである。
〔従来技術の問題点および解決すべき課題〕
合成樹脂模造竹筒を製造する場合には、第３図
に示すように長尺筒芯体W1の外周に表皮層W2を
形成すると共に、長手方向に所定の間隔をもつて
節目W3付けが行われる。
かゝる製造法としては、例えば特公昭54−1747
号公報記載の方法が提案されているが、長尺筒芯
体W1と表皮層W2の積層筒Ｗを押出した後、節目
W3に相当する外周部分に樹脂を盛付けるため、
盛付工程にある間、積層筒Ｗの押出しは一時停止
を余儀無くされる上に、かゝる方法では節目の外
観が如何にも安つぽく、模造竹としての商品性が
今一歩不充分であつた。
本発明は、簡単な設備で、自然な竹筒外観を呈
する合成樹脂模造竹筒を量産出来る方法を提供す
ることを目的とするものである。
〔課題を解決する手段〕
本発明は、細径部RSと太径部RLとからなる中
芯１７に対して、クロスヘツドから押出された直
後の未硬化の積層筒Ｗを挿通すると同時に、細径
部RSにおいて、一対の節様凹部１２ａを有する
プレス金型１２・１２にて当該積層筒Ｗの外周を
緩衝的に包囲しつつ同速で太径部RLに押出方向
へ移動させ、太径部RLに位置して内方から強制
膨出される積層筒Ｗ外周部を、プレス金型１２・
１２の節様凹部１２ａ・１２ａ内に噛込ませて節
付けを行うことによつて自然竹に見紛うばかりの
模造竹量産方法を実現したものである。
以下、更に詳しくは、添附図面に基いて説明す
る。
図面において、１は芯体W1を押出す押出機で、
２は表皮層W2を押出す押出機であつてクロスヘ
ツドダイ３に連通している。このクロスヘツドダ
イ３から押出される積層筒Ｗは、以下に述べるプ
レス装置４にて節付けされた後、冷却装置５で冷
却されて硬化し、引取装置６を介して引取られ、
後方の切断装置７にて所定寸法に切断される。
プレス装置４は、支持台１６上を進退シリンダ
１５により一定周期で進退動作を繰返すフレーム
１３に搭載されている。このプレス装置４には、
昇降シリンダ１１・１１によつて積層筒Ｗを上下
から挟包可能な節様凹部１２ａ・１２ａを有する
一対の半円筒形状のプレス金型１２・１２が内蔵
されている。
また、クロスヘツドダイ３の先端には、押出方
向に延びる固定軸１８が装着されており、更にこ
の固定軸１８の先端に細径部RSと太径部RLとを
有する中芯１７が接続されている。
上記プレス装置４においては、クロスヘツドダ
イ３から押出されてくる積層筒Ｗは、固定軸１８
に沿つて移動されるものであり、未硬化の塑性変
形可能な柔軟状態で中芯１７を細径部RS→太径
部RLと移行する。
しかして、積層筒Ｗが中芯１７を通過しようと
するとき、中芯１７の細径部RSにおいて、一対
のプレス金型１２・１２が細径部RSに位置する
部位を挟包するように積層筒Ｗを取囲む。ここで
は、プレス金型１２・１２は積層筒外表面に緩衝
的作用をもつて当接するだけで、積層的に細径部
RS対し押圧力を与えることはない。
かゝる状態でプレス金型１２・１２を積層筒Ｗ
と同速で移動させ、積層筒Ｗの節様凹部１２ａ・
１２ａで挟包された部分が太径部RLに至ると、
積層筒Ｗは内方から強制膨出されるのに対し、そ
れを挟包するプレス金型１２・１２は若干太径部
RLに従つて広がるけれども、一定限度以上は拡
がらない。これにより、プレス金型１２の節様凹
部１２ａ・１２ａに積層筒外表面が噛込み、噛込
んだ部位は筒Ｗの周囲に節様の凹凸条W3を形成
することになる。
その後は、プレス金型１２・１２を開き、細径
部RSA位置に後退させ、再び閉じ、太径部RLB
位置に移動させて開く動作を繰返すと、所定の間
隔をもつて節目が形成される。
〔製造例〕
上記構成の設備を使用し、50ｍ／ｍ芯筒用押出
機１から、下記組成の樹脂を下記条件下に押出す
ると共に、30ｍ／ｍ表層用押出機２から、下記組
成の樹脂を下記条件下に押出し、節付け後冷却切
断して、管外径（25ｍ／ｍ）、節部外径（26.5
ｍ／ｍ）節間隔225mm、長さ４ｍ、管内径2.3mm、
被覆部0.5mmの模造竹筒を得る。
[Industrial Application Field] The present invention relates to a method for manufacturing a synthetic resin imitation bamboo tube with beautiful joints. [Problems in the Prior Art and Issues to be Solved ] When manufacturing a synthetic resin imitation bamboo tube, as shown in FIG . Joints W3 are attached at predetermined intervals in the direction. Examples of such manufacturing methods include, for example, the Japanese Patent Publication Act of 1747
The method described in the publication has been proposed, but after extruding the laminated tube W consisting of the long tube core W 1 and the skin layer W 2 ,
In order to apply resin to the outer periphery corresponding to W 3 ,
During the plating process, the extrusion of the laminated tube W has to be temporarily stopped, and with such a method, the appearance of the joints looks very cheap, and the marketability of the imitation bamboo is inadequate. It was hot. An object of the present invention is to provide a method for mass-producing synthetic resin imitation bamboo tubes exhibiting a natural bamboo tube appearance using simple equipment. [Means for Solving the Problems] The present invention provides for inserting an uncured laminated cylinder W that has just been extruded from a crosshead into the core 17 consisting of a small diameter portion RS and a large diameter portion RL, and at the same time In the section RS, the outer periphery of the laminated tube W is surrounded in a cushioning manner by the press molds 12 having a pair of joint-like recesses 12a, and moved at the same speed in the extrusion direction to the large diameter section RL. The outer periphery of the laminated cylinder W, which is located at RL and forcibly expanded from the inside, is pressed into a press mold 12.
By inserting the bamboo into twelve knot-like recesses 12a and performing knotting, a method for mass-producing imitation bamboo that can be easily mistaken for natural bamboo has been realized. More details will be described below with reference to the accompanying drawings. In the drawing, 1 is an extruder that extrudes the core W 1 ,
2 is an extruder for extruding the skin layer W 2 and is connected to a crosshead die 3 . The laminated tube W extruded from this crosshead die 3 is knotted in a press device 4 described below, cooled and hardened in a cooling device 5, and taken off via a take-off device 6.
It is cut into a predetermined size by a cutting device 7 at the rear. The press device 4 is mounted on a frame 13 that moves forward and backward on a support table 16 at regular intervals by a cylinder 15 that moves forward and backward. This press device 4 includes
A pair of semi-cylindrical press molds 12, 12 having knot-like recesses 12a, 12a, which can hold the laminated cylinder W from above and below by means of lifting cylinders 11, 11, are built-in. Further, a fixed shaft 18 extending in the extrusion direction is attached to the tip of the crosshead die 3, and a center core 17 having a small diameter portion RS and a large diameter portion RL is connected to the tip of the fixed shaft 18. ing. In the press device 4, the laminated tube W extruded from the crosshead die 3 is attached to the fixed shaft 18.
The center core 17 is moved from the small diameter portion RS to the large diameter portion RL in an unhardened, plastically deformable, flexible state. Therefore, when the laminated tube W is about to pass through the core 17, the pair of press molds 12, 12 are arranged to sandwich the portion located in the narrow diameter portion RS of the core 17. It surrounds the laminated tube W. Here, the press molds 12, 12 are only in contact with the outer surface of the laminated cylinder with a buffering effect, and the small diameter portion is laminated.
No pressing force is applied to RS. In such a state, the press molds 12 and 12 are stacked in the stacked cylinder W.
The joint-like recesses 12a and 12a of the laminated tube W are moved at the same speed as the
When the part wrapped by 12a reaches the large diameter part RL,
While the laminated tube W is forcibly expanded from the inside, the press molds 12 that enclose it are slightly thicker in diameter.
Although it spreads according to RL, it does not spread beyond a certain limit. As a result, the outer surface of the laminated cylinder is bitten into the joint-like recesses 12a, 12a of the press mold 12, and a knot-like uneven strip W3 is formed around the tube W at the bittened portion. After that, the press molds 12 and 12 are opened, retracted to the small diameter part RSA position, closed again, and the large diameter part RLB
By repeating the movement and opening operation, joints are formed at predetermined intervals. [Production Example] Using the equipment configured as above, a resin with the following composition is extruded from a 50 m/m core tube extruder 1 under the following conditions, and a resin with the following composition is extruded from a 30 m/m surface layer extruder 2. was extruded under the following conditions, cooled and cut after knotting, and the pipe outer diameter (25 m/m) and knot outer diameter (26.5
m/m) node spacing 225mm, length 4m, pipe inner diameter 2.3mm,
Obtain an imitation bamboo tube with a covering portion of 0.5 mm.
以上説明したとおり、本発明によれば積層筒材
の押出速度で移動するプレス金型を、中芯の細径
部から太径部に移動する未硬化の積層筒材に作用
させ、積層筒材の膨出作用を利用して押出速度に
同調して移動するプレス金型で連続的に節付加工
を施してゆくので、その生産性は従来法に比して
頗るアツプされる。しかもまた、従来の盛付けに
よる節付法と異なり、前述の方式で節付けを行う
ので、形式される節目も自然竹に見紛うばかりの
美しい立体形状が現出される。
更に、押出された積層筒Ｗを冷却前に中芯を通
過させると同時に、プレス金型で包囲し、同速で
スライドさせればよいので、簡単な装置をもつて
実施出来る利点がある。
As explained above, according to the present invention, a press die that moves at the extrusion speed of the laminated cylindrical material is made to act on the uncured laminated cylindrical material that moves from the narrow diameter part to the large diameter part of the core, and the laminated cylindrical material Since the knotting process is performed continuously using a press mold that moves in synchronization with the extrusion speed by utilizing the swelling effect of the extruder, the productivity is significantly increased compared to the conventional method. Moreover, unlike the conventional method of knotting by arranging the bamboo, knotting is done using the method described above, so that the knots are formed into a beautiful three-dimensional shape that can easily be mistaken for natural bamboo. Furthermore, the extruded laminated cylinder W is allowed to pass through the core before being cooled, and at the same time it is surrounded by a press mold and slid at the same speed, so there is an advantage that it can be carried out using a simple device.
第１図は本発明に係る模造竹の製造方法を実施
するための全体設備を示す概要図、第２図はその
要部である−線断面図、第３図は合成模造竹
筒の斜視図である。
１・２……押出機、３……クロスヘツドダイ、
４……プレス材、１２……プレス金型、１７……
中芯。
Fig. 1 is a schematic diagram showing the overall equipment for carrying out the method for producing imitation bamboo according to the present invention, Fig. 2 is a cross-sectional view taken along the line 1-2, showing the main parts thereof, and Fig. 3 is a perspective view of a synthetic imitation bamboo tube. be. 1/2...Extruder, 3...Crosshead die,
4...Pressed material, 12...Press mold, 17...
Center core.
Claims (1)
と共に、長手方向に所定間隔にて節目W3を形成
して、合成樹脂模造竹筒を製造するにあたり、 芯体W1と表皮層W2とをクロスヘツドダイ３か
ら同時押出して一体成形した後、この押出積層筒
Ｗが硬化する前に、その中筒部W3へ、細径部RS
と太径部RLとからなる中芯１７外周を挿通する
と同時に、細径部RSにおいて緩衝的に外周を包
囲する一対の節様凹部１２ａを有するプレス金型
１２・１２を、前記積層筒Ｗの移動速度を同速で
移動させ、太径部RLにおいて内方から強制膨出
される積層筒Ｗの外周部をプレス金型１２・１２
の節様凹部１２ａ・１２ａに噛込ませて節付けを
行うことを特徴とする合成樹脂模造竹筒の製造
法。[Claims] 1. In producing a synthetic resin imitation bamboo tube by layering a skin layer W 2 on the outer periphery of a long tube core W 1 and forming joints W 3 at predetermined intervals in the longitudinal direction. , After the core body W 1 and the skin layer W 2 are simultaneously extruded from the crosshead die 3 and integrally molded, before the extruded laminated tube W hardens, the narrow diameter portion RS is transferred to the middle tube portion W 3 of the extruded laminated tube W.
A press mold 12 having a pair of knot-like recesses 12a that is inserted through the outer periphery of the core 17 consisting of a large diameter portion RL and a large diameter portion RL, and at the same time surrounds the outer periphery in a cushioning manner in a small diameter portion RS is inserted into the laminated tube W. The outer periphery of the laminated cylinder W, which is forced to bulge from the inside at the large diameter part RL, is moved at the same speed as the press molds 12.
A method for producing a synthetic resin imitation bamboo tube, characterized in that knots are made by biting into knot-like recesses 12a, 12a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59216876A JPS6194744A (en) | 1984-10-15 | 1984-10-15 | Manufacture of imitation bamboo cylinder made of synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59216876A JPS6194744A (en) | 1984-10-15 | 1984-10-15 | Manufacture of imitation bamboo cylinder made of synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6194744A JPS6194744A (en) | 1986-05-13 |
| JPH0374622B2 true JPH0374622B2 (en) | 1991-11-27 |
Family
ID=16695295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59216876A Granted JPS6194744A (en) | 1984-10-15 | 1984-10-15 | Manufacture of imitation bamboo cylinder made of synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6194744A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990073498A (en) * | 1999-07-19 | 1999-10-05 | 한웅남 | method of manufacturing bamboo shaped pipe |
| CN2691725Y (en) * | 2004-02-04 | 2005-04-13 | 谢忠栗 | Bamboo joint tubular shaped furniture structure |
-
1984
- 1984-10-15 JP JP59216876A patent/JPS6194744A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6194744A (en) | 1986-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |