IT1291979B1 - Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component - Google Patents
Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive componentInfo
- Publication number
- IT1291979B1 IT1291979B1 ITMI971207A IT1291979B1 IT 1291979 B1 IT1291979 B1 IT 1291979B1 IT MI971207 A ITMI971207 A IT MI971207A IT 1291979 B1 IT1291979 B1 IT 1291979B1
- Authority
- IT
- Italy
- Prior art keywords
- cleaning member
- polymer
- reactive component
- chemically reactive
- fed
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title abstract 8
- 229920001730 Moisture cure polyurethane Polymers 0.000 title abstract 3
- 229920002635 polyurethane Polymers 0.000 title abstract 3
- 239000004814 polyurethane Substances 0.000 title abstract 3
- 239000000203 mixture Substances 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
Abstract
Polyurethane mixture is produced from at least a total pre-polymer and a chemically reactive component in a self cleaning mixer having a mixing chamber (22) into which the pre-polymer is injected via radially oriented nozzles (23,24) and the reactive component is injected via an axial duct (41), in a cleaning member (27), opening into the bottom of the mixing chamber. The cleaning member (27) is axially movable between a retracted position, in which the injection nozzles (23,24) open into the mixing chamber (22) and an advanced position in which the injection nozzles (23,24) are closed. Also claimed is the apparatus for performing the method above in which, in the advanced position of the cleaning member (27), the polyurethane components are recycled via longitudinally extending recycling grooves (39,44) in the cleaning member (27), the grooves being separated by a sealing zone (27c); and the above apparatus which includes a valving member (52) slidable in the axial duct of th e cleaning member (27) with a fluid actuated control system (28,29,56) connected to the valving member (52) and the cleaning member (57).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97MI001207 IT1291979B1 (en) | 1997-05-22 | 1997-05-22 | Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component |
DE69809119T DE69809119T2 (en) | 1997-05-22 | 1998-05-20 | Self-cleaning mixing device and method for producing polyurethane mixtures |
EP98109146A EP0879685B1 (en) | 1997-05-22 | 1998-05-20 | Self-cleaning, mixing apparatus and method for the production of polyurethane mixtures |
US09/082,725 US6079867A (en) | 1997-05-22 | 1998-05-21 | Self-cleaning, mixing apparatus and method for the production of polyurethane formulations |
JP14179998A JP3703625B2 (en) | 1997-05-22 | 1998-05-22 | Self-cleaning mixing apparatus and method for producing a polyurethane mixture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97MI001207 IT1291979B1 (en) | 1997-05-22 | 1997-05-22 | Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI971207A0 ITMI971207A0 (en) | 1997-05-22 |
ITMI971207A1 ITMI971207A1 (en) | 1998-11-22 |
IT1291979B1 true IT1291979B1 (en) | 1999-01-25 |
Family
ID=11377199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT97MI001207 IT1291979B1 (en) | 1997-05-22 | 1997-05-22 | Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1291979B1 (en) |
-
1997
- 1997-05-22 IT IT97MI001207 patent/IT1291979B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITMI971207A0 (en) | 1997-05-22 |
ITMI971207A1 (en) | 1998-11-22 |
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Legal Events
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