IT1254438B - Procedimento per la fabbricazione di poliuretano espanso - Google Patents
Procedimento per la fabbricazione di poliuretano espansoInfo
- Publication number
- IT1254438B IT1254438B ITMI920287A ITMI920287A IT1254438B IT 1254438 B IT1254438 B IT 1254438B IT MI920287 A ITMI920287 A IT MI920287A IT MI920287 A ITMI920287 A IT MI920287A IT 1254438 B IT1254438 B IT 1254438B
- Authority
- IT
- Italy
- Prior art keywords
- mixing
- polyurethane
- manufacture
- polyol
- isocyanate
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/424—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with conical screw surrounded by conical casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/40—Mixers with shaking, oscillating, or vibrating mechanisms with an axially oscillating rotary stirrer
- B01F31/401—Mixers with shaking, oscillating, or vibrating mechanisms with an axially oscillating rotary stirrer for material flowing continuously axially therethrough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7404—Mixing devices specially adapted for foamable substances
- B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
- B29B7/7414—Mixing devices specially adapted for foamable substances with supply of gas with rotatable stirrer, e.g. using an intermeshing rotor-stator system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/802—Constructions or methods for cleaning the mixing or kneading device
-
- 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
- B29C44/3442—Mixing, kneading or conveying the foamable material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Polyurethanes Or Polyureas (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Procedimento per la fabbricazione di poliuretano espanso formato da miscele di isocianato e poliolio che reagiscono con il poliuretano con un dispositivo di miscelazione, che presenta una vite senza fine di miscelazione conica, spostabile nella direzione assiale, rispetto all'apertura di uscita, fra una posizione di pulizia avanzata. Nel detto procedimento l'isocianato e il poliolio nella posizione di miscelazione e di uscita vengono miscelati con un numero dì giri della vite senza fine di miscelazione compreso fra circa 5000 e circa 10000 giri al minuto, la miscele viene introdotta in una forma e successivamente il poliuretano di reazione che si trova nella posizione di pulizia viene proiettato sulla parete interna del dispositivo con un numero di giri della vite senza fine di miscelazione da circa 15000 fino e circa 20000 giri al minuto, e contemporaneamente i residui della miscela vengono eliminati delle volute della vite senza fine. (FIG. 1).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4111458A DE4111458C1 (it) | 1991-04-09 | 1991-04-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI920287A0 ITMI920287A0 (it) | 1992-02-12 |
ITMI920287A1 ITMI920287A1 (it) | 1993-08-12 |
IT1254438B true IT1254438B (it) | 1995-09-25 |
Family
ID=6429145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI920287A IT1254438B (it) | 1991-04-09 | 1992-02-12 | Procedimento per la fabbricazione di poliuretano espanso |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE4111458C1 (it) |
DK (1) | DK173953B1 (it) |
FR (1) | FR2675147A1 (it) |
GB (1) | GB2254570B (it) |
IT (1) | IT1254438B (it) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1302527B1 (it) * | 1998-12-10 | 2000-09-05 | Main Group Spa | Dispositivo per lo stampaggio di materie plastiche per colata. |
ITPD20040120A1 (it) * | 2004-05-11 | 2004-08-11 | Main Group Spa | Dispositivo di pulitura per una camera di miscelazione in bassa pressione particolarmente per poliuretano |
EP4041512A1 (de) | 2019-10-08 | 2022-08-17 | Covestro Intellectual Property GmbH & Co. KG | Vorrichtung zur vermischung reaktiver komponenten |
EP4001335A1 (de) | 2020-11-18 | 2022-05-25 | Covestro Deutschland AG | Verfahren zur herstellung von polyurethan-schaumstoffen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1191548B (de) * | 1956-07-31 | 1965-04-22 | United Shoe Corp | Maschine zum Vermischen von Schaumstoffe bildenden Fluessigkeiten |
AT316850B (de) * | 1969-12-17 | 1974-07-25 | Semperit Ag | Vorrichtung zum chargenweisen Mischen und Fördern |
-
1991
- 1991-04-09 DE DE4111458A patent/DE4111458C1/de not_active Revoked
-
1992
- 1992-02-12 IT ITMI920287A patent/IT1254438B/it active
- 1992-03-19 FR FR9203291A patent/FR2675147A1/fr active Granted
- 1992-03-30 GB GB9206880A patent/GB2254570B/en not_active Expired - Fee Related
- 1992-04-08 DK DK199200476A patent/DK173953B1/da not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2254570B (en) | 1994-08-03 |
ITMI920287A0 (it) | 1992-02-12 |
FR2675147A1 (fr) | 1992-10-16 |
DK47692A (da) | 1992-10-10 |
GB2254570A (en) | 1992-10-14 |
DK173953B1 (da) | 2002-03-04 |
FR2675147B1 (it) | 1994-04-22 |
ITMI920287A1 (it) | 1993-08-12 |
DK47692D0 (da) | 1992-04-08 |
DE4111458C1 (it) | 1992-08-13 |
GB9206880D0 (en) | 1992-05-13 |
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