Device for degassing and filtering plastic melts
April 24, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References RE23880 3874090 Extrusion process and single-, dual- or multiple-screw extruder Degassing extruder Apparatus for filtering and extruding synthetic plastic scrap material Apparatus for degassing thermoplastic synthetic plastics material Process for removing moisture and volatiles from pellets in single screw extruders Method for extruding polycarbonate of low bulk density Process and device for monitoring the degree of wear of a compression worm conveying plasticized material Patent #: 6406174 InventorAssigneeApplicationNo. 12298248 filed on 04/24/2007US Classes:366/75With specified vent meansExaminersPrimary: Soohoo, Tony GAssistant: Bui, Dung Attorney, Agent or FirmForeign Patent References
International ClassA21C 1/10AbstractThe invention relates to a device for the extrusion of thermoplastic synthetic material featuring an extruder screw (2) which is mounted on a housing (1) including a plasticizing section (P) at the inlet side, a degassing section which is mounted upstream on a discharge section (A) and a conveying outlet (3) operating in the opposite direction which is located between the plasticizing section (P) and the degassing section (E). A flow channel (5) that contains a melt filter (4) is bridged over by at least one of the conveying outlets (3) in the opposite direction. To create favorable production conditions, the extruder screw (2) forms a similar conveying outlet (7) operating in the same direction between the conveying outlet (3) in the opposite direction and the downstream port (6) of the flow channel (5). The housing (1) has at least one degassing vent (8) at the transition area of the conveying outlet (3) operating in the opposite direction and the conveying outlet (7) operating in the same direction.Field of SearchCentrifugal typeImpeller or screw on rotating shaft With separate and distinct gas withdrawal chamber Plural means being diverse, or parallel and intermeshing or concentric Agitator or kneader comprises means rotating about a horizontal axis With specified vent means Stirrer is through-pass screw conveyor And downstream breaker plate or screen Including sections of different pitch Notched, apertured, or interrupted thread 425/28 | |
