JPH0645174B2 - Method for manufacturing plastic tubular body - Google Patents

Method for manufacturing plastic tubular body

Info

Publication number
JPH0645174B2
JPH0645174B2 JP61061544A JP6154486A JPH0645174B2 JP H0645174 B2 JPH0645174 B2 JP H0645174B2 JP 61061544 A JP61061544 A JP 61061544A JP 6154486 A JP6154486 A JP 6154486A JP H0645174 B2 JPH0645174 B2 JP H0645174B2
Authority
JP
Japan
Prior art keywords
cooling liquid
tubular body
cylindrical body
liquid tank
cooled
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
Application number
JP61061544A
Other languages
Japanese (ja)
Other versions
JPS62216721A (en
Inventor
卓三 高田
克之 茂木
泰平 細川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to JP61061544A priority Critical patent/JPH0645174B2/en
Publication of JPS62216721A publication Critical patent/JPS62216721A/en
Publication of JPH0645174B2 publication Critical patent/JPH0645174B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0027—Cutting off

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は容器等に使用されるプラスチックの筒状体を製
造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a method for producing a plastic cylinder used for a container or the like.

〔従来の技術〕[Conventional technology]

従来、プラスチック筒状体の製造方法として特開昭４９
−１２０９５７号公報がある。Conventionally, as a method for producing a plastic tubular body, JP-A-49
There is a publication of -120957.

前記公報に記載された合成樹脂未配向パイプの製造法
は、押出機の環状ダイより樹脂を筒状体にして押し出
し、この筒状体を冷却水槽内に垂下し、この筒状体の下
部を水中ピンチローラで挟んで閉塞し、この閉塞した筒
状体の上部に筒内圧調節循環装置から水等の封入物を送
り込み、筒状体を内外から冷却し、さらに、この筒状体
の引取ピンチローラで挟んで冷却水槽の外に引き出し、
切断装置で適宜の長さに切断するパイプの製造法であ
る。The method for producing a synthetic resin unoriented pipe described in the above-mentioned publication is that a resin is extruded into a tubular body from an annular die of an extruder, the tubular body is hung down in a cooling water tank, and the lower portion of the tubular body is It is sandwiched by underwater pinch rollers to close it, and an enclosed material such as water is sent from the in-cylinder pressure adjustment circulation device to the upper part of this closed cylindrical body, the cylindrical body is cooled from inside and outside, and the take-up pinch of this cylindrical body Nip it with a roller and pull it out of the cooling water tank,
This is a method for producing a pipe that is cut into an appropriate length by a cutting device.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

前記従来のパイプの製造法は、環状ダイより押し出した
筒状体を冷却水槽内に垂下し、この筒状体を、筒状体の
内外から冷却して、肉厚の偏らないものに形成するとと
もに、筒状体の内外の冷却を均一に、しかも短時間で冷
却できて優れた製造法である。In the conventional method for manufacturing a pipe, a tubular body extruded from an annular die is hung in a cooling water tank, and the tubular body is cooled from inside and outside of the tubular body to form a wall thickness with no deviation. At the same time, the inside and outside of the tubular body can be cooled uniformly and in a short time, which is an excellent manufacturing method.

しかしながら、前記パイプの製造法は、筒状体の固化し
た部分を水中ピンチローラで挟んでつぶし、筒状体を閉
塞し、また、引取ピンチローラで挟んで閉塞し、冷却水
槽の外で筒状体を切断した際、筒状体内の封入物が外部
に排出されないようにしているので、筒状体は或る程度
柔軟性を有するものに限定される。However, in the method for manufacturing the pipe, the solidified portion of the tubular body is crushed by sandwiching it with an underwater pinch roller to close the tubular body, and also sandwiched with a take-up pinch roller to close the tubular body outside the cooling water tank. When the body is cut, the inclusions inside the tubular body are prevented from being discharged to the outside, so the tubular body is limited to a certain degree of flexibility.

本発明は前記事項に鑑みなされたものであり、柔軟性に
乏しい筒状体であっても、筒状体の内面を冷却した液が
冷却水槽の外部に排出されないようにすることを技術的
課題とする。The present invention has been made in view of the above matters, and it is a technical problem to prevent the liquid, which has cooled the inner surface of the tubular body, from being discharged to the outside of the cooling water tank even in the case of the tubular body having poor flexibility. And

〔問題点を解決するための手段〕[Means for solving problems]

第一の発明は、押出機１のダイ３より溶融プラスチック
を筒状体６にして垂直下方に押し出し、この押し出した
筒状体６を冷却液槽７内に垂下し、筒状体６の下端の開
口６ａで、前記筒状体６内を前記冷却液槽７内と連通さ
せるとともに、前記筒状体６内の冷却液の液面付近から
昇温した冷却液を排液管11で排出し、筒状体６の内面及
び外面を冷却液で冷却して前記筒状体６を固化させ、こ
の固化した筒状体６を前記冷却液槽７内の下部に引き取
り、この筒状体６を前記冷却液槽７内で適宜の長さに切
断して冷却液槽７外に搬出できるようにした。The first invention is that the molten plastic is extruded vertically downward from the die 3 of the extruder 1 into a tubular body 6, and the extruded tubular body 6 is hung in the cooling liquid tank 7 to form the lower end of the tubular body 6. Through the opening 6a, the inside of the cylindrical body 6 is communicated with the inside of the cooling liquid tank 7, and the cooling liquid heated up from near the liquid surface of the cooling liquid in the cylindrical body 6 is discharged through the drain pipe 11. The inner and outer surfaces of the tubular body 6 are cooled with a cooling liquid to solidify the tubular body 6, and the solidified tubular body 6 is drawn into the lower portion of the cooling liquid tank 7 to remove the tubular body 6. The cooling liquid tank 7 was cut to an appropriate length so that it could be carried out of the cooling liquid tank 7.

第二の発明は、押出機１のダイ３より溶融プラスチック
を筒状体６にして垂直下方に押し出し、この押し出した
筒状体６を冷却液槽７内に垂下し、筒状体６の下端の開
口６ａで、前記筒状体６内を前記冷却液槽７内と連通さ
せるとともに、前記筒状体６内の冷却液の液面付近に給
液管10で冷却液を供給し、かつ、前記筒状体６内の前記
液面付近から昇温した冷却液を排液管11で排出し、筒状
体６の内面及び外面を冷却液で冷却して前記筒状体６を
固化させ、この固化した筒状体６を前記冷却液槽７内の
下部に引き取り、この筒状体６を前記冷却液槽７内で適
宜の長さに切断して冷却液槽７外に搬出できるようにし
た。The second invention is that the molten plastic is extruded vertically downward from the die 3 of the extruder 1 into a tubular body 6, and the extruded tubular body 6 is hung in the cooling liquid tank 7 to form the lower end of the tubular body 6. Through the opening 6a, the inside of the cylindrical body 6 is communicated with the inside of the cooling liquid tank 7, and the cooling liquid is supplied to the vicinity of the liquid surface of the cooling liquid in the cylindrical body 6 by the liquid supply pipe 10, and The cooling liquid heated up from the vicinity of the liquid level in the tubular body 6 is discharged through the drainage pipe 11, and the inner surface and the outer surface of the tubular body 6 are cooled by the cooling liquid to solidify the tubular body 6. The solidified tubular body 6 is drawn into the lower portion of the cooling liquid tank 7, and the tubular body 6 is cut into an appropriate length in the cooling liquid tank 7 so that it can be carried out of the cooling liquid tank 7. did.

〔作用〕[Action]

押出機１のダイ３より溶融プラスチックを筒状体６にし
て垂直下方に押し出し、この押し出した筒状体６を冷却
液槽７内に垂下させ、筒状体６の下端の開口６ａで、前
記筒状体６内を前記冷却液槽７内と連通させるととも
に、前記筒状体６内の冷却液の液面付近から昇温した冷
却液を排出管11で排出すると、筒状体６は内面及び外面
を冷たい冷却液に浸され、急速に冷却される。Molten plastic is extruded vertically downward from the die 3 of the extruder 1 into a tubular body 6, and the extruded tubular body 6 is hung in a cooling liquid tank 7, and the opening 6a at the lower end of the tubular body 6 When the inside of the cylindrical body 6 is communicated with the inside of the cooling liquid tank 7 and the cooling liquid whose temperature has risen from near the liquid surface of the cooling liquid in the cylindrical body 6 is discharged through the discharge pipe 11, the cylindrical body 6 has an inner surface. And the outer surface is dipped in cold cooling liquid to be cooled rapidly.

そして、筒状体６の内外は等圧となり、外側から押圧さ
れないので所定の外径を保持するとともに、筒状体６は
垂直に保持されているので、軸方向に直角な外力（重
力）が加わることなく冷却することができ、そして、筒
状体６内に圧力がかからないのでダイ３より押し出され
た筒状体６が膨張することがない。Then, the inside and outside of the tubular body 6 are at equal pressure and are not pressed from the outside, so that a predetermined outer diameter is maintained, and since the tubular body 6 is held vertically, an external force (gravitational force) perpendicular to the axial direction is applied. It can be cooled without being applied, and since no pressure is applied to the tubular body 6, the tubular body 6 extruded from the die 3 does not expand.

また、第二の発明では、さらに、筒状体６内の冷却液の
液面付近に冷却液を供給しているので、筒状体６をいっ
そう急速に冷却する。Further, in the second invention, since the cooling liquid is supplied to the vicinity of the liquid surface of the cooling liquid in the tubular body 6, the tubular body 6 is cooled more rapidly.

〔実施例〕〔Example〕

第１図は本発明の実施に使用されるプラスチック筒状体
の製造装置の一例を示すものである。以下、第１図に基
づいて実施例を説明する。FIG. 1 shows an example of an apparatus for manufacturing a plastic cylindrical body used for carrying out the present invention. An embodiment will be described below with reference to FIG.

すなわち、第一の発明の実施例は押出機１でポリエチレ
ンテレフタレートを加熱溶融し、ダイ３より筒状体６に
して垂直下方に押し出し、この押し出した筒状体６を５
℃のエチレングリコール水溶液が満たされた上面開放型
の冷却液層７内に垂下させ、筒状体６の下端の開口６ａ
で、前記筒状体６内を前記冷却液層７内と連通させると
ともに、前記筒状体６内の冷却液の液面付近から昇温し
た冷却液を、押出機１のダイ３に設けた排液管11で排出
すると、筒状体６は内面及び外面を冷たい冷却液に浸さ
れ、急速に冷却される。That is, in the embodiment of the first invention, polyethylene terephthalate is heated and melted in the extruder 1 to form a cylindrical body 6 from the die 3 and extruded vertically downward.
C., and the opening 6a at the lower end of the cylindrical body 6 is hung down into the cooling liquid layer 7 having an open top surface filled with an aqueous solution of ethylene glycol at .degree.
Then, the inside of the tubular body 6 is communicated with the inside of the cooling liquid layer 7, and the cooling liquid heated up from near the liquid surface of the cooling liquid in the tubular body 6 is provided in the die 3 of the extruder 1. When the tubular body 6 is discharged through the drainage pipe 11, the inner surface and the outer surface of the tubular body 6 are immersed in cold cooling liquid, and are rapidly cooled.

そして、冷却して固化した筒状体６を引取機２８で２m/
分の速度で冷却液槽７の下部に引き取り、外径18mm・内
径12mmの透明な筒状体６となし、この筒状体６をカッタ
ー12で所望の長さに切断し、バケットコンベヤ20で冷却
液槽７の外に取り出す。Then, the cooled and solidified tubular body 6 is 2 m /
It is drawn into the lower part of the cooling liquid tank 7 at a speed of a minute to form a transparent tubular body 6 with an outer diameter of 18 mm and an inner diameter of 12 mm. The tubular body 6 is cut with a cutter 12 to a desired length, and the bucket conveyor 20 is used. It is taken out of the cooling liquid tank 7.

また、第二の発明の実施例は、前記製造方法において、
押出機１のダイ３に給液管10を設け、筒状体６内の冷却
液の液面において冷却液を供給し、筒状体６内の冷却液
が一層高温にならないようにした。Further, the embodiment of the second invention, in the manufacturing method,
A liquid supply pipe 10 was provided in the die 3 of the extruder 1 and the cooling liquid was supplied at the liquid level of the cooling liquid in the tubular body 6 so that the cooling liquid in the tubular body 6 did not reach a higher temperature.

〔発明の効果〕〔The invention's effect〕

第一の発明は、押出機１のダイ３より溶融プラスチック
を筒状体６にして垂直下方に押し出し、この押し出した
筒状体６は下端の開口６ａで、前記筒状体６内を前記冷
却液槽７内とを連通させるとともに、前記筒状体６内の
冷却液の液面付近から昇温した冷却液を排液管11で排出
しているので、筒状体６は内面及び外面を冷却液に浸さ
れ、急速に冷却される。In the first invention, molten plastic is extruded vertically downward from a die 3 of an extruder 1 into a cylindrical body 6, and the extruded cylindrical body 6 has an opening 6a at a lower end, and the inside of the cylindrical body 6 is cooled. While communicating with the inside of the liquid tank 7 and discharging the cooling liquid whose temperature has risen from near the liquid surface of the cooling liquid in the tubular body 6 through the drainage pipe 11, the tubular body 6 has an inner surface and an outer surface. Immersed in cooling liquid and cooled rapidly.

そして、筒状体６は内外が等圧となっているので、筒状
体６は冷却液槽７内で水圧により押されて収縮すること
がなく、また、ダイ３より押し出された直後の筒状体６
も内圧により膨張することがない。Further, since the inside and outside of the tubular body 6 are at equal pressure, the tubular body 6 is not pressed by water pressure in the cooling liquid tank 7 and does not contract, and the tubular body immediately after being pushed out from the die 3 is used. Form 6
Does not expand due to internal pressure.

そして、筒状体６は冷却液槽７内で切断されるので、筒
状体６の内面を冷却した冷却液は冷却水槽７の外に排出
されず、筒状体６を閉塞する必要もなく、筒状体６が柔
軟性に乏しいものであっても、筒状体６の内外を冷却す
ることができる。さらに、筒状体６は垂直状態で冷却さ
れるので、軸方向に直角な外力（重力）が加わることが
なく、真っ直ぐな筒状体６を得ることができる。Since the tubular body 6 is cut in the cooling liquid tank 7, the cooling liquid that has cooled the inner surface of the tubular body 6 is not discharged to the outside of the cooling water tank 7, and it is not necessary to close the tubular body 6. Even if the tubular body 6 is poor in flexibility, the inside and outside of the tubular body 6 can be cooled. Furthermore, since the tubular body 6 is cooled in the vertical state, an external force (gravity) perpendicular to the axial direction is not applied, and the straight tubular body 6 can be obtained.

第二の発明は前記事項に加えて、筒状体６内の液面付近
に冷却液を供給しているので、筒状体６を一層急速に冷
却できる。In the second invention, in addition to the above matters, the cooling liquid is supplied to the vicinity of the liquid surface in the tubular body 6, so that the tubular body 6 can be cooled more rapidly.

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

第一図は本発明の実施に使用されるプラスチック筒状体
製造装置の一例を示す図である。 １……押出機、３……ダイ、 ６……筒状体、６ａ……下端の開口、 ７……冷却液槽、10……給液管、 11……排液管。FIG. 1 is a diagram showing an example of a plastic tubular body manufacturing apparatus used for carrying out the present invention. 1 ... Extruder, 3 ... Die, 6 ... Cylindrical body, 6a ... Opening at the lower end, 7 ... Cooling liquid tank, 10 ... Liquid supply pipe, 11 ... Drainage pipe.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】押出機１のダイ３より溶融プラスチックを
筒状体６にして垂直下方に押し出し、この押し出した筒
状体６を冷却液槽７内に垂下し、筒状体６の下端の開口
６ａで、前記筒状体６内を前記冷却液槽７内と連通させ
るとともに、前記筒状体６内の冷却液の液面付近から昇
温した冷却液を排液管11で排出し、筒状体６の内面及び
外面を冷却液で冷却して前記筒状体６を固化させ、この
固化した筒状体６を前記冷却液槽７内の下部に引き取
り、この筒状体６を前記冷却液槽７内で適宜の長さに切
断するプラスチック筒状体の製造方法。1. A molten plastic is extruded vertically downward from a die 3 of an extruder 1 into a cylindrical body 6, and the extruded cylindrical body 6 is suspended in a cooling liquid tank 7 to At the opening 6a, the inside of the cylindrical body 6 is communicated with the inside of the cooling liquid tank 7, and the cooling liquid heated up from near the liquid surface of the cooling liquid in the cylindrical body 6 is discharged by the drain pipe 11, The inner surface and the outer surface of the cylindrical body 6 are cooled with a cooling liquid to solidify the cylindrical body 6, and the solidified cylindrical body 6 is drawn into the lower portion of the cooling liquid tank 7, and the cylindrical body 6 is A method for manufacturing a plastic cylindrical body, which is cut into an appropriate length in the cooling liquid tank 7. 【請求項２】押出機１のダイ３より溶融プラスチックを
筒状体６にして垂直下方に押し出し、この押し出した筒
状体６を冷却液槽７内に垂下し、筒状体６の下端の開口
６ａで、前記筒状体６内を前記冷却液槽７内と連通させ
るとともに、前記筒状体６内の冷却液の液面付近に給液
管10で冷却液を供給し、かつ、前記筒状体６内の前記液
面付近から昇温した冷却液を排液管11で排出し、筒状体
６の内面及び外面を冷却液で冷却して前記筒状体６を固
化させ、この固化した筒状体６を前記冷却液槽７内の下
部に引き取り、この筒状体６を前記冷却液槽７内で適宜
の長さに切断するプラスチック筒状体の製造方法。2. The molten plastic is extruded vertically downward from the die 3 of the extruder 1 into a cylindrical body 6, and the extruded cylindrical body 6 is drooped into the cooling liquid tank 7 and the lower end of the cylindrical body 6 is removed. At the opening 6a, the inside of the cylindrical body 6 is communicated with the inside of the cooling liquid tank 7, and the cooling liquid is supplied to the vicinity of the liquid level of the cooling liquid in the cylindrical body 6 by the liquid supply pipe 10, and The cooling liquid heated up from the vicinity of the liquid level in the tubular body 6 is discharged through the drain pipe 11, and the inner surface and the outer surface of the tubular body 6 are cooled by the cooling liquid to solidify the tubular body 6. A method for producing a plastic tubular body, in which the solidified tubular body 6 is drawn into the lower portion of the cooling liquid tank 7 and the tubular body 6 is cut into an appropriate length in the cooling liquid tank 7.
JP61061544A 1986-03-19 1986-03-19 Method for manufacturing plastic tubular body Expired - Lifetime JPH0645174B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61061544A JPH0645174B2 (en) 1986-03-19 1986-03-19 Method for manufacturing plastic tubular body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61061544A JPH0645174B2 (en) 1986-03-19 1986-03-19 Method for manufacturing plastic tubular body

Publications (2)

Publication Number Publication Date
JPS62216721A JPS62216721A (en) 1987-09-24
JPH0645174B2 true JPH0645174B2 (en) 1994-06-15

Family

ID=13174166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61061544A Expired - Lifetime JPH0645174B2 (en) 1986-03-19 1986-03-19 Method for manufacturing plastic tubular body

Country Status (1)

Country Link
JP (1) JPH0645174B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100773046B1 (en) * 2006-03-24 2007-11-02 김현순 The making device a multiplex floor rib pipe and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9187269B2 (en) 2012-10-12 2015-11-17 Chevron Phillips Chemical Company Lp Polymeric pipe loading

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49120957A (en) * 1973-03-23 1974-11-19
JPS50121067U (en) * 1974-03-19 1975-10-03
JPS5971834A (en) * 1982-10-18 1984-04-23 Toyobo Co Ltd Method and apparatus for forming plastic pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100773046B1 (en) * 2006-03-24 2007-11-02 김현순 The making device a multiplex floor rib pipe and method

Also Published As

Publication number Publication date
JPS62216721A (en) 1987-09-24

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