FR2150714A1 - Extruder nozzle - for expanded polymertubes - Google Patents
Extruder nozzle - for expanded polymertubesInfo
- Publication number
- FR2150714A1 FR2150714A1 FR7227643A FR7227643A FR2150714A1 FR 2150714 A1 FR2150714 A1 FR 2150714A1 FR 7227643 A FR7227643 A FR 7227643A FR 7227643 A FR7227643 A FR 7227643A FR 2150714 A1 FR2150714 A1 FR 2150714A1
- Authority
- FR
- France
- Prior art keywords
- nozzle
- tube
- expanded
- polymertubes
- extruder nozzle
- 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.)
- Withdrawn
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
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
- B29C44/507—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The extruder has a nozzle with an annular orifice through which polymer sheet is extruded in tube form and subsequently expanded, and is provided with cooling tubes placed immediately in front of the nozzle directly at the external and/or internal peripheries of the tube or the nozzle, so as to cool the tube by contact. The use of direct cooling immediately the tube leaves the nozzle stiffens the surfaces and prevents creases developing. The cooling tubes pref. have an anti-friction coating, e.g. of PTFE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19717132890U DE7132890U (en) | 1971-08-28 | 1971-08-28 | EXTRUDER NOZZLE |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2150714A1 true FR2150714A1 (en) | 1973-04-13 |
Family
ID=6623528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7227643A Withdrawn FR2150714A1 (en) | 1971-08-28 | 1972-08-01 | Extruder nozzle - for expanded polymertubes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE7132890U (en) |
FR (1) | FR2150714A1 (en) |
IT (1) | IT962220B (en) |
-
1971
- 1971-08-28 DE DE19717132890U patent/DE7132890U/en not_active Expired
-
1972
- 1972-08-01 FR FR7227643A patent/FR2150714A1/en not_active Withdrawn
- 1972-08-25 IT IT52350/72A patent/IT962220B/en active
Also Published As
Publication number | Publication date |
---|---|
DE7132890U (en) | 1971-11-18 |
IT962220B (en) | 1973-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |