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1. 发明专利

BR8804231A 未知
公开(公告)号：BR8804231A
公开(公告)日：1990-04-10
申请号：BR8804231
申请日：1988-08-19
申请人： RHODIA
发明人： DOLLHOPF RUEDIGER , NANDZIK BERND
IPC分类号： B29C47/40 , B29C48/455 , B29C48/74 , B29C48/76 , B29C47/76 , B29C47/46 , B29C47/10 , B29C47/74
摘要： Method of extruding and a single, twin or multiscrew extruder. … In the extruder, the thread of the screw or of each of the screws is partly left-handed and partly right-handed, so that the material to be processed is in part conveyed in a direction A and in another part conveyed in an opposite direction B. … The method is a venting extrusion method and the extruder is a vented extruder: the following are provided… - a back venting arrangement (7, 22) at the end (8, 19) of the screw (1, 16) or screws (1, 16), if the material to be processed is led away from this end (8, 19),… and/or… - a back venting arrangement (41, 52) at the point between the thread sections of the screw (1, 16) or screws (1, 16) from where the material to be processed is led away in opposite directions B and A. … According to the invention,… - continuous operation is possible,… - no dead zones and breakaway edges are formed,… - the back venting arrangement (7, 22, 41, 52) can be easily sealed against ingress of oxygen,… - thermally and oxidatively sensitive products, such as nylon 66, can also be processed without detriment and in continuous operation (example: synthetic fibre extrusion spinning). … …

2. 发明专利

DD282195A5 未知
公开(公告)号：DD282195A5
公开(公告)日：1990-09-05
申请号：DD31885088
申请日：1988-08-11
申请人： RHODIA AG
发明人： DOLLHOPF RUEDIGER , NANDZIK BERND
IPC分类号： B29C47/40 , B29C48/455 , B29C48/74 , B29C48/76 , B29C47/46
摘要： Method of extruding and a single, twin or multiscrew extruder. … In the extruder, the thread of the screw or of each of the screws is partly left-handed and partly right-handed, so that the material to be processed is in part conveyed in a direction A and in another part conveyed in an opposite direction B. … The method is a venting extrusion method and the extruder is a vented extruder: the following are provided… - a back venting arrangement (7, 22) at the end (8, 19) of the screw (1, 16) or screws (1, 16), if the material to be processed is led away from this end (8, 19),… and/or… - a back venting arrangement (41, 52) at the point between the thread sections of the screw (1, 16) or screws (1, 16) from where the material to be processed is led away in opposite directions B and A. … According to the invention,… - continuous operation is possible,… - no dead zones and breakaway edges are formed,… - the back venting arrangement (7, 22, 41, 52) can be easily sealed against ingress of oxygen,… - thermally and oxidatively sensitive products, such as nylon 66, can also be processed without detriment and in continuous operation (example: synthetic fibre extrusion spinning). … …

3. 发明专利

ZA887098B EXTRUSION PROCESS AND SINGLE-,DUAL-OR MULTIPLE-WORM EXTRUDER 未知
公开(公告)号：ZA887098B
公开(公告)日：1989-05-30
申请号：ZA887098
申请日：1988-09-22
申请人： RHODIA
发明人： DOLLHOPF RUEDIGER , RUEDIGER DOLLHOPF , NANDZIK BERND , BERND NANDZIK
IPC分类号： B29C47/40 , B29C48/455 , B29C48/74 , B29C48/76 , B29C
摘要： Method of extruding and a single, twin or multiscrew extruder. … In the extruder, the thread of the screw or of each of the screws is partly left-handed and partly right-handed, so that the material to be processed is in part conveyed in a direction A and in another part conveyed in an opposite direction B. … The method is a venting extrusion method and the extruder is a vented extruder: the following are provided… - a back venting arrangement (7, 22) at the end (8, 19) of the screw (1, 16) or screws (1, 16), if the material to be processed is led away from this end (8, 19),… and/or… - a back venting arrangement (41, 52) at the point between the thread sections of the screw (1, 16) or screws (1, 16) from where the material to be processed is led away in opposite directions B and A. … According to the invention,… - continuous operation is possible,… - no dead zones and breakaway edges are formed,… - the back venting arrangement (7, 22, 41, 52) can be easily sealed against ingress of oxygen,… - thermally and oxidatively sensitive products, such as nylon 66, can also be processed without detriment and in continuous operation (example: synthetic fibre extrusion spinning). … …

4. 发明专利

CA1314675C EXTRUSION PROCESS AND SINGLE, DUAL OR MULTIPLE-WORM EXTRUDER 未知
公开(公告)号：CA1314675C
公开(公告)日：1993-03-23
申请号：CA575319
申请日：1988-08-22
申请人： RHODIA AG
发明人： DOLLHOPF RUEDIGER , NANDZIK BERND
IPC分类号： B29C47/40 , B29C48/455 , B29C48/74 , B29C48/76 , B29C47/76
摘要： In the case of the extruder, the thread of the worm, or that of the worms, is partly left-handed and partly right-handed, so that one part of the material to be processed is conveyed in direction A, while the other part is conveyed in the opposite direction B. The process is a degasifying-extrusion-process and the extruder is a degasifying extruder: the following are provided: a reverse-degasifying arrangement at the end of the worm, or worms, if the material to be processed is carried away from this end, and/or a reverse-degasifying arrangement at the location between the threaded sections of the worm, or worms, whence the material to be processed is carried away in opposite directions B and A. According to the invention: continuous operation is possible, no dead areas and breakaway edges are formed, the reverse-degasifying arrangement is easily sealed off against any ingress of oxygen, and products sensitive to heat and oxidation, such as polyamide66, may also be produced, without damage, in continuous operation; example: synthetic-fibre extrusion-spinning.

5. 发明专利

ZA8807098B EXTRUSION PROCESS AND SINGLE-,DUAL-OR MULTIPLE-WORM EXTRUDER 未知
公开(公告)号：ZA8807098B
公开(公告)日：1989-05-30
申请号：ZA8807098
申请日：1988-09-22
申请人： RHODIA
发明人： DOLLHOPF RUEDIGER , RUEDIGER DOLLHOPF , NANDZIK BERND , BERND NANDZIK
IPC分类号： B29C47/46 , B29C47/40 , B29C47/74 , B29C47/76 , B29C
CPC分类号： B29C47/745 , B29C47/0009 , B29C47/76

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