DE2525561C2 - Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre - Google Patents
Verfahren zur kontinuierlichen Herstellung wärmeisolierter LeitungsrohreInfo
- Publication number
- DE2525561C2 DE2525561C2 DE2525561A DE2525561A DE2525561C2 DE 2525561 C2 DE2525561 C2 DE 2525561C2 DE 2525561 A DE2525561 A DE 2525561A DE 2525561 A DE2525561 A DE 2525561A DE 2525561 C2 DE2525561 C2 DE 2525561C2
- Authority
- DE
- Germany
- Prior art keywords
- crosslinking
- crosslinking agent
- agent
- blowing agent
- heat
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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
- B29C48/03—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
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating 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
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
- B29K2301/10—Thermosetting resins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Description
Das Treibmittel sollte in einer solchen Menge zugegeben werden, daß der erzeugte Schaum ein Raumgewicht zwischen 50 und 300 kg/m3 hat. Die Zersetzungstemperatur des Vernetzungsmittels ist unterhalb der Zersetzungstemperatur des Treibmittels zu wählen. Dadurch beginnt die Anvernetzung frühe" als die Schäumung. Weiterhin ist es zweckmäßig, die äußere Oberfläche der Wärmeisolierschicht zu glätten und zu verdichten. Dies kann beispielsweise dadurch geschehen, daß man die expandierte Isolierschicht durch eine erhitzte Matrize schickt oder aber, was besonders günstig ist.
Claims (6)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2525561A DE2525561C2 (de) | 1975-06-07 | 1975-06-07 | Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre |
CH1255375A CH589252A5 (de) | 1975-06-07 | 1975-09-26 | |
IT48348/76A IT1057271B (it) | 1975-06-07 | 1976-03-01 | Procedimento per la produzione continua di condutture termicamente isolate |
AT186876A AT357749B (de) | 1975-06-07 | 1976-03-15 | Verfahren zur kontinuierlichen herstellung waermeisolierter leitungsrohre |
JP51030016A JPS51149376A (en) | 1975-06-07 | 1976-03-22 | Method of producing continuously heat insulating conductor tube |
DK141576A DK147372C (da) | 1975-06-07 | 1976-03-30 | Fremgangsmaade ved kontinuerlig fremstilling af varmeisolerede ledningsroer |
FR7612458A FR2313198A2 (fr) | 1975-06-07 | 1976-04-27 | Procede pour la fabrication en continu de conduits calorifuges |
GB22078/76A GB1480324A (en) | 1975-06-07 | 1976-05-27 | Method of continuously producing thermally insulated piping and piping produced thereby |
NL7606018A NL7606018A (nl) | 1975-06-07 | 1976-06-03 | Werkwijze voor het continu vervaardigen van warmtegeisoleerde leidingen. |
BE167652A BE842625R (fr) | 1975-06-07 | 1976-06-04 | Procede de fabrication continue de tuyaux de canalisation calorifuges |
SE7606344A SE420690B (sv) | 1975-06-07 | 1976-06-04 | Sett att kontinuerligt framstella vermeisolerande ledningsror |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2525561A DE2525561C2 (de) | 1975-06-07 | 1975-06-07 | Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2525561A1 DE2525561A1 (de) | 1976-12-23 |
DE2525561C2 true DE2525561C2 (de) | 1985-11-07 |
Family
ID=5948600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2525561A Expired DE2525561C2 (de) | 1975-06-07 | 1975-06-07 | Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS51149376A (de) |
AT (1) | AT357749B (de) |
BE (1) | BE842625R (de) |
CH (1) | CH589252A5 (de) |
DE (1) | DE2525561C2 (de) |
DK (1) | DK147372C (de) |
FR (1) | FR2313198A2 (de) |
GB (1) | GB1480324A (de) |
IT (1) | IT1057271B (de) |
NL (1) | NL7606018A (de) |
SE (1) | SE420690B (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2628883A1 (de) * | 1976-06-26 | 1978-01-05 | Kabel Metallwerke Ghh | Verfahren zum herstellen einer umhuellung aus aufgeschaeumtem kunststoff |
DE2806560B2 (de) * | 1978-02-16 | 1981-05-07 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre |
NL8005255A (nl) * | 1980-09-19 | 1982-04-16 | Wavin Bv | Kunststofbuisdeel voorzien van een kunststofschuimisolatielaag. |
GB9025923D0 (en) * | 1990-11-28 | 1991-01-09 | Textilver Sa | Improvements in and relating to tubing |
EP1029615A1 (de) * | 1991-03-29 | 2000-08-23 | Asahi Tec Corporation | Verfahren zur Herstellung eines verlorenen Modells |
EP3216579A1 (de) | 2016-03-11 | 2017-09-13 | Halcor S.A. | Vernetzter schlauchförmiger schaum |
US20210018094A1 (en) * | 2017-04-18 | 2021-01-21 | R & D Plastics Of Hickory, Ltd. | Ring dam and method for manufacturing a ring dam |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1504355A1 (de) * | 1962-10-15 | 1969-09-25 | Hercules Inc | Formgegenstaende aus Polypropylenschaumstoffen mit Zellstruktur und Verfahren zur Herstellung derselben |
DE1629367A1 (de) * | 1966-08-11 | 1971-02-04 | Dynamit Nobel Ag | Verfahren zur kontinuierlichen Herstellung von vernetzten Polyolefin-Schaumstoffen |
DE1629455A1 (de) * | 1966-09-06 | 1971-01-28 | Kabel Metallwerke Ghh | Verfahren zum Vulkanisieren oder Vernetzen von thermoplastischen Isolierstoffschichten |
-
1975
- 1975-06-07 DE DE2525561A patent/DE2525561C2/de not_active Expired
- 1975-09-26 CH CH1255375A patent/CH589252A5/xx not_active IP Right Cessation
-
1976
- 1976-03-01 IT IT48348/76A patent/IT1057271B/it active
- 1976-03-15 AT AT186876A patent/AT357749B/de not_active IP Right Cessation
- 1976-03-22 JP JP51030016A patent/JPS51149376A/ja active Pending
- 1976-03-30 DK DK141576A patent/DK147372C/da not_active IP Right Cessation
- 1976-04-27 FR FR7612458A patent/FR2313198A2/fr active Granted
- 1976-05-27 GB GB22078/76A patent/GB1480324A/en not_active Expired
- 1976-06-03 NL NL7606018A patent/NL7606018A/xx not_active Application Discontinuation
- 1976-06-04 SE SE7606344A patent/SE420690B/xx not_active Application Discontinuation
- 1976-06-04 BE BE167652A patent/BE842625R/xx active
Also Published As
Publication number | Publication date |
---|---|
CH589252A5 (de) | 1977-06-30 |
AT357749B (de) | 1980-07-25 |
DK147372B (da) | 1984-07-09 |
NL7606018A (nl) | 1976-12-09 |
BE842625R (fr) | 1976-12-06 |
FR2313198B2 (de) | 1980-04-30 |
SE420690B (sv) | 1981-10-26 |
IT1057271B (it) | 1982-03-10 |
GB1480324A (en) | 1977-07-20 |
SE7606344L (sv) | 1976-12-08 |
ATA186876A (de) | 1979-12-15 |
JPS51149376A (en) | 1976-12-22 |
DE2525561A1 (de) | 1976-12-23 |
DK147372C (da) | 1985-01-07 |
FR2313198A2 (fr) | 1976-12-31 |
DK141576A (da) | 1976-12-08 |
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Legal Events
Date | Code | Title | Description |
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AF | Is addition to no. |
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D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8340 | Patent of addition ceased/non-payment of fee of main patent |