IT1274248B - Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agent - Google Patents
Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agentInfo
- Publication number
- IT1274248B IT1274248B ITMI950218A ITMI950218A IT1274248B IT 1274248 B IT1274248 B IT 1274248B IT MI950218 A ITMI950218 A IT MI950218A IT MI950218 A ITMI950218 A IT MI950218A IT 1274248 B IT1274248 B IT 1274248B
- Authority
- IT
- Italy
- Prior art keywords
- expansion agent
- high pressure
- polyurethane components
- mixing
- equipment
- Prior art date
Links
- 239000003795 chemical substances by application Substances 0.000 title abstract 5
- 229920002635 polyurethane Polymers 0.000 title abstract 4
- 239000004814 polyurethane Substances 0.000 title abstract 4
- 239000007788 liquid Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agent; the polyurethane components are fed at high pressure and injected into a mixing chamber where they are mixed with a metered quantity of a liquid pre- expansion agent; the pre-expansion agent is first injected into the flow of at least one of the components at a point close to the injection nozzle for the said component. A constant feed pump supplies metered quantities of the pre-expansion agent in overlapping cycles synchronised with the polyurethane components to a high pressure mixing head chamber equipped with means for throttling the flow in order to maintain a mixing pressure above atmospheric pressure in that chamber. <IMAGE>
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI950218A IT1274248B (en) | 1995-02-07 | 1995-02-07 | Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI950218A IT1274248B (en) | 1995-02-07 | 1995-02-07 | Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agent |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITMI950218A0 ITMI950218A0 (en) | 1995-02-07 |
| ITMI950218A1 ITMI950218A1 (en) | 1996-08-07 |
| IT1274248B true IT1274248B (en) | 1997-07-15 |
Family
ID=11370458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITMI950218A IT1274248B (en) | 1995-02-07 | 1995-02-07 | Process and equipment for the high pressure mixing of polyurethane components with a liquid pre-expansion agent |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1274248B (en) |
-
1995
- 1995-02-07 IT ITMI950218A patent/IT1274248B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI950218A0 (en) | 1995-02-07 |
| ITMI950218A1 (en) | 1996-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |