Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. DE000010144748 - Method for processing recycled polyethylene terephthalate bottles, uses multishaft extruders with screws rotating in same direction and specific ratios of housing and screw surfaces and screw diameter

Office
Allemagne
Numéro de la demande 10144748
Date de la demande 11.09.2001
Numéro de publication 000010144748
Date de publication 28.05.2003
Type de publication A1
CIB
B29C 47/4
B29B 7/48
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
29TRAVAIL DES MATIÈRES PLASTIQUES; TRAVAIL DES SUBSTANCES À L'ÉTAT PLASTIQUE EN GÉNÉRAL
BPRÉPARATION OU PRÉTRAITEMENT DES MATIÈRES À FAÇONNER; FABRICATION DE GRANULÉS OU DE PRÉFORMES; RÉCUPÉRATION DES MATIÈRES PLASTIQUES OU D'AUTRES CONSTITUANTS DES DÉCHETS CONTENANT DES MATIÈRES PLASTIQUES
7Mélange; Malaxage
30continu, avec dispositifs mécaniques de mélange ou de malaxage
34avec dispositifs de mélange ou de malaxage mobiles
38rotatifs
46avec plus d'un arbre
48à dispositifs à engrènement, p.ex. à vis qui s'engrènent
CPC
B29C 48/03
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
B29C 48/405
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
395using screws surrounded by a cooperating barrel, e.g. single screw extruders
40using two or more parallel screws ; or at least two parallel non-intermeshing screws; , e.g. twin screw extruders
405Intermeshing co-rotating screws
B29C 48/69
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
50Details of extruders
69Filters or screens for the moulding material
B29C 48/76
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
50Details of extruders
76Venting ; , drying; means; Degassing means
B29C 48/80
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
80at the plasticising zone, e.g. by heating cylinders
B29C 48/832
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
80at the plasticising zone, e.g. by heating cylinders
83Heating or cooling the cylinders
832Heating
Déposants BUEHLER AG
Inventeurs STURM ACHIM PHILIPP
SCHWEIKLE JUERGEN
CHRISTEL ANDREAS
NAEF CHRISTOPH
INNEREBNER FEDERICO
Titre
(DE) Verfahren zur Durchfürung kontinuierlicher Misch-und Aufbereitungsprozesse
(EN) Method for processing recycled polyethylene terephthalate bottles, uses multishaft extruders with screws rotating in same direction and specific ratios of housing and screw surfaces and screw diameter
Abrégé
(DE)

Die Erfindung betrifft ein Verfahren, in welchem Kunststoffe und Elastomere (wie z. B. PET oder Kautschuk) in möglichst schonender Weise und mit möglichst hoher Durchsatzmenge verarbeitet werden können, um die Qualität des Endproduktes zu erhöhen und die Wirtschaftlichkeit des ganzen Prozesses zu steigern. Erfindungsgemäß können Prozessaufgaben wie Mischen, Kühlen/Heizen (Wärmeaustausch) und Entgasen (Stoffaustausch) gleichzeitig und mit hoher Effizienz ausgeführt werden.

(EN)

Method for processing a product uses multishaft extruders with self-cleaning screws rotating in the same direction with a processing chamber which has a housing with internal surface Am and a free volume Vf. The extruder screws have an outer diameter Da and an inner diameter Di. Some or all of the processing zone has ratio Am<3>/Vf<2> = 1020 - 3050 for two-screw extruders and 2000 -7300 for three-screw extruders, with a ratio Da/Di = 1.3 - 1.7. An Independent claim is included for a method for processing a product using multishaft extruders with self-cleaning screws rotating in the same direction with a processing chamber which has a screw surface Az and a free volume Vf. The extruder screws have an outer diameter Da and an inner diameter Di. Some or all of the processing zone has ratio Az<3>/Vf<2> = 0.5 - 2.11 for two-screw extruders and 0.02 - 1.5 for three-screw extruders, with a ratio Da/Di = 1.3 - 1.7