using two or more parallel screws, e.g. twin screw extruders

Full Title

Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor > Component parts, details or accessories; Auxiliary operations > Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die > using screws surrounded by a cooperating barrel, e.g. single screw extruders > using two or more parallel screws, e.g. twin screw extruders

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL

Subclass:

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

Child Classifications

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• B29C 48/405 Intermeshing co-rotating screws
• B29C 48/41 Intermeshing counter-rotating screws
• B29C 48/415 and having partially non-intermeshing screws
• B29C 48/42 Non-identical or non-mirrored screws
• B29C 48/425 using three or more screws
• B29C 48/435 Sub-screws