WO1999067558A2 - Procede et dispositif permettant de former une mousse calorifuge sur un tuyau - Google Patents

Procede et dispositif permettant de former une mousse calorifuge sur un tuyau Download PDF

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Publication number
WO1999067558A2
WO1999067558A2 PCT/KR1999/000322 KR9900322W WO9967558A2 WO 1999067558 A2 WO1999067558 A2 WO 1999067558A2 KR 9900322 W KR9900322 W KR 9900322W WO 9967558 A2 WO9967558 A2 WO 9967558A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
foam
force
preliminary granular
heat insulating
Prior art date
Application number
PCT/KR1999/000322
Other languages
English (en)
Other versions
WO1999067558A3 (fr
Inventor
Kyu-Tae Yoon
Original Assignee
Mipo Chemicals 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 Mipo Chemicals Co., Ltd. filed Critical Mipo Chemicals Co., Ltd.
Priority to AU46548/99A priority Critical patent/AU4654899A/en
Publication of WO1999067558A2 publication Critical patent/WO1999067558A2/fr
Publication of WO1999067558A3 publication Critical patent/WO1999067558A3/fr

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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/129—Enhancing adhesion to the preformed part using an interlayer
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/35—Component parts; Details or accessories
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/51—Screws with internal flow passages, e.g. for molten 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints

Definitions

  • the present invention relates to a method an method and apparatus for forming heat insulating foam on pipe, and more particularly to a method and apparatus for forming successively heat insulating foam on the outer surface of the pipe, by which it is unnecessary to carry out the heat treatment process after the piping process using the pipe, thus working efficiency is enhanced, piping expenses are minimized, and heat insulating efficiency is enlarged.
  • a heat insulating treatment of the pipe which is used in various kinds of piping, comprises putting a heat insulating material on the outer surface of the pipe after the piping process is finished, and taping the outer surface of the pipe.
  • the heat insulating treatment must be carried out only after the piping process is finished.
  • a finishing process of the ceiling or a finishing process of the walls can not be carried out before the heat insulating process is finished after the piping process, thus the entire working process is delayed.
  • a method for forming heat insulating foam on the outer surface of a pipe comprising: forming a foaming chamber constituted by a tubular body; transferring by force preliminary granular foam into the foaming chamber by means of a screw conveyor; feeding a pipe to the foaming chamber by means of a feeding roller; filling the preliminary granular foam between the pipe and the foaming chamber; heating directly the preliminary granular foam, which is transferred by force by the screw conveyor and filled, with dry vapor of the temperature ranged between 110 °C to 140 °C, to foam it; discharging by force the dry vapor among the preliminary granular foam such that any blowhole is not created in the heat insulating foam; and heating indirectly the pipe at the temperature of 70 °C to 120 °C for a prescribed time period, and further comprising applying adhesives on the outer surface of the pipe fed into the foaming chamber for promoting the combining force between the outer surface of the pipe and the preliminary granular foam.
  • Fig. 1 is a side sectional view of a preferred embodiment according to the present invention
  • Fig. 2 is a detailed cross-sectional view showing an adhesives guiding duct shown in Fig. 1;
  • Fig. 3 is a side sectional view showing the operation in accordance with the present invention.
  • Fig. 1 is a side sectional view of a preferred embodiment according to the present invention
  • Fig. 2 is a detailed cross-sectional view showing an adhesives guiding duct shown in Fig. 1
  • Fig. 3 is a side sectional view showing the operation in accordance with the present invention.
  • an apparatus for forming successively the heat insulating foam on the outer surface of the pipe As shown in Fig.
  • an apparatus comprises: a foaming means 20 constituted by a tubular body for forming a heat insulating foam 51 on the outer surface of the pipe 50 fed by a feeding roller 41; a transferring means 10 connected to the front end of the foaming means 20 for transferring by force the preliminary granular foam 52 into a foaming chamber 21 such that the preliminary granular foam 52 is filled uniformly on the outer surface of the pipe 50; and an adhesives applying means 30 for applying the adhesives on the outer surface of the pipe 50 in order that the combining force is promoted between the outer surface of the pipe 50 and the preliminary granular foam 52 filled in the foaming chamber 21 by the transferring means 10 for transferring by force the preliminary granular foam.
  • the foaming means 20 which is connected at the front end thereof to the transferring means 10 for transferring by force the preliminary granular foam, comprises a foaming chamber 21 constituted by a tubular body including a passage 26 which a fluidic heat medium of the temperature ranged between 70 °C to 120 °C is circulated through, a heater and a heating means; a dry vapor supplying port 23 arranged at the inner circumferential edge of the foaming chamber 21 for supplying a dry vapor of the temperature ranged between 110 °C to 140 °C to heat directly the preliminary granular foam 52, the dry vapor being supplied through a dry vapor supplying tube 22; and an air discharging port 25 arranged at the inner circumferential edge of the dry vapor supplying port 23 for discharging by force any air among the preliminary granular foam 52 through an air discharging tube 24 connected to a vacuum pump which is not shown in the drawings, to prevent formation of the blowhole in the heat insulating foam 51.
  • the transferring means 10 for transferring by force the preliminary granular foam comprises a screw conveyor 11 for transferring by force the preliminary granular foam 52, a supplying tube 13 for supplying the preliminary granular foam 52 from the hopper to the screw conveyor 11, and a driving motor 12 for driving the screw conveyor 11.
  • the screw conveyor 11 is in configuration of a truncated cone with a central hollow portion.
  • the screw conveyor 11 is provided at the outer side with a gear 11a engaged with a pinion 12a of the driving motor 12. And the screw conveyor 11 is connected to the foaming chamber 21 via a bearing.
  • the adhesives applying means 30 comprises an adhesives applying port 33 connected to the inner side of the transferring means 10 for transferring by force the preliminary granular foam, for discharging the adhesives to the inner side end, and an adhesives guiding duct 32 for guiding the adhesives from an adhesives supplying tube 31 to the adhesives applying port 33.
  • a well-known coating means for promoting combining force between the heat insulating foam and the pipe which the foam is arranged on and forming an protection layer. It is also preferable to provide a well-known clothing means for closing synthetic resin film, fabric sheet, foil, etc.
  • reference numeral 42 designates a feeding roller.
  • the apparatus for forming heat insulating foam on the pipe comprising transferring means 10 for transferring by force the preliminary granular foam, the foaming means 20, and the adhesives applying means 30, the adhesives is discharged from the adhesives applying port 33 of the adhesives applying means 30 when the pipe is transferred by the feeding roller 41 driven by an ordinary control means.
  • the transferring means 10 transfers by force into the foaming chamber 21 the preliminary granular foam 52 supplied through the supplying tube 13 for supplying the preliminary granular foam by the screw conveyor 11.
  • the fluidic heat medium is circulated along the passage 26 of the foaming chamber 21 to heat the foaming chamber 21 at the temperature of 70 °C to 120 °C.
  • a dry vapor of the temperature ranged between 110 °C to 140 °C is supplied into the foaming chamber 21 through the dry vapor supplying port 23.
  • the air in the foaming chamber 21 is discharged through the air discharging port 25.
  • the adhesives are applied on the pipe 50 transferred to the apparatus of the present invention by the adhesives applying port 33 of the adhesives applying means 30, and the preliminary granular foam 52 is attached on the outer surface of the pipe, the preliminary granular foam 52 being transferred by force into the foaming chamber 21 by means of the screw conveyor 11.
  • the preliminary granular foam 52 which is attached to the outer surface of the pipe 50 and filled in the foaming chamber 21, is heated directly by the dry vapor supplied through the dry vapor supplying port 23 to effect the foaming formation of the preliminary granular foam.
  • the preliminary granular foam 52 is further heated by means of the fluidic heat medium circulated in the passage 26 or the heating means such as a heater, and foamed in the foaming chamber 21 in which the temperature is maintained constantly, and subsequently matured. Furthermore, the air discharging port 25 discharges by force any air among the preliminary granular foam 52 through the dry vapor supplying port 23, to prevent formation of the blowhole in the heat insulating foam 51 and to promote the filling process of the preliminary granular foam 52. Through the process as described above, obtained is the pipe 50 with the heat insulating foam 51 on.
  • the piping work can be carried out very quickly as additional heat insulating process is not required in connection with the piping work.
  • the forming process according to the present invention is carried out successively, thus productivity is enlarged and the manufacturing costs are reduced.
  • combining force is increased between the heat insulating foam and the pipe as the adhesives is applied on the outer surface of the pipe to form a heat insulating foam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif qui permettent de former une mousse calorifuge sur un tuyau. Le dispositif permettant de former ladite mousse à la surface externe d'un tuyau comprend : un moyen de moussage (20), constitué d'un corps tubulaire, qui forme une mousse calorifuge (51) à la surface externe du tuyau (50) amené par un rouleau d'alimentation (41); un moyen de transport (10), relié à l'extrémité avant du moyen de moussage (20), qui pousse la mousse granulaire préliminaire (52) dans une chambre de moussage (21), de façon que ladite mousse recouvre uniformément la surface externe du tuyau (50); et un moyen d'application (30) d'adhésifs, qui applique les adhésifs à la surface externe du tuyau (50) de façon à accroître la force de liaison entre le tuyau (50) et la mousse granulaire préliminaire (52). L'invention permet d'effectuer très rapidement la pose des tuyaux du fait qu'elle ne nécessite pas de procédé d'isolation thermique supplémentaire. Le procédé de formation de la présente invention peut être utilisé immédiatement, ce qui augmente la productivité et réduit les coûts de production. Il permet notamment d'accroître la force de liaison entre la mousse calorifuge et le tuyau, du fait que l'on applique des adhésifs à la surface externe de ce dernier afin de former ladite mousse.
PCT/KR1999/000322 1998-06-20 1999-06-19 Procede et dispositif permettant de former une mousse calorifuge sur un tuyau WO1999067558A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46548/99A AU4654899A (en) 1998-06-20 1999-06-19 Method and apparatus for forming heat insulating foam on pipe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1998/023297 1998-06-20
KR1019980023297A KR19980065057A (ko) 1998-06-20 1998-06-20 파이프의 발포단열층 성형방법 및 장치

Publications (2)

Publication Number Publication Date
WO1999067558A2 true WO1999067558A2 (fr) 1999-12-29
WO1999067558A3 WO1999067558A3 (fr) 2000-10-12

Family

ID=19540190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1999/000322 WO1999067558A2 (fr) 1998-06-20 1999-06-19 Procede et dispositif permettant de former une mousse calorifuge sur un tuyau

Country Status (3)

Country Link
KR (1) KR19980065057A (fr)
AU (1) AU4654899A (fr)
WO (1) WO1999067558A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832667A1 (fr) * 2001-11-27 2003-05-30 Claude Ailleau Procede et installation de fabrication de pieces poreuses par agglomeration de granules en matiere thermoplastique
CN111688093A (zh) * 2020-05-09 2020-09-22 山东劳动职业技术学院（山东劳动技师学院） 一种步进式机械管件外保温层发泡机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100901793B1 (ko) * 2007-12-05 2009-06-11 주식회사 젠트로 중공체 피복장치 및 방법

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002353A1 (fr) * 1989-02-10 1992-02-20 Oy Muotekno Ab Procede de revetement par extrusion d'un tube d'acier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281618A (ja) * 1988-09-19 1990-03-22 Sumitomo Metal Ind Ltd 断熱被覆金属管の製造方法
JPH07241914A (ja) * 1994-03-04 1995-09-19 Sekisui Chem Co Ltd 表皮フィルム付き押出発泡保温筒の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002353A1 (fr) * 1989-02-10 1992-02-20 Oy Muotekno Ab Procede de revetement par extrusion d'un tube d'acier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN & JP 07 241 914 A (SEKUSUI CHEM CO LTD) 19 September 1995 *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 276 (M-984) & JP 02 081 618 A (SUMITOMO METAL IND LTD) 14 June 1990 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832667A1 (fr) * 2001-11-27 2003-05-30 Claude Ailleau Procede et installation de fabrication de pieces poreuses par agglomeration de granules en matiere thermoplastique
CN111688093A (zh) * 2020-05-09 2020-09-22 山东劳动职业技术学院（山东劳动技师学院） 一种步进式机械管件外保温层发泡机

Also Published As

Publication number Publication date
KR19980065057A (ko) 1998-10-07
WO1999067558A3 (fr) 2000-10-12
AU4654899A (en) 2000-01-10

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