IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0681849
(1984-12-11)
|
우선권정보 |
SE-0002033 (1983-04-12) |
국제출원번호 |
PCT/SE84/00128
(1984-04-09)
|
§371/§102 date |
19841211
(19841211)
|
국제공개번호 |
WO-8404070
(1984-10-25)
|
발명자
/ 주소 |
- Dziewanowski Andr (Stockholm SEX) Piotrowski Krzysztof (Sollentuna SEX) Zaremba Krzysztof (Vallentuna SEX)
|
출원인 / 주소 |
- Mats Lundberg (Sundsvall SEX 03)
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
3 |
초록
▼
A method of manufacturing extruded pipes where plasticized material, for example plastic material, is advanced to an extrusion nozzle comprising a circular gap (2). The method is especially characterized in that the material is transported axially in said gap (2) while material is moved, for example
A method of manufacturing extruded pipes where plasticized material, for example plastic material, is advanced to an extrusion nozzle comprising a circular gap (2). The method is especially characterized in that the material is transported axially in said gap (2) while material is moved, for example rotated, in the circumferential direction of the gap (2) so that the material at least partially is caused to assume an orientation deviating from the axial direction, whereby a non-axial orientation will prevail in the extruded pipe (3) and increase the strength. The invention also relates to an apparatus for carrying out the method.
대표청구항
▼
A method of manufacturing extruded pipes where plasticized material is advanced to an extrusion nozzle comprising a circular gap, the material being transported axially in said gap while material is caused to be rotationally moved in the circumferential direction of the gap so that the material at l
A method of manufacturing extruded pipes where plasticized material is advanced to an extrusion nozzle comprising a circular gap, the material being transported axially in said gap while material is caused to be rotationally moved in the circumferential direction of the gap so that the material at least partially is caused to assume an orientation deviating from the axial direction, whereby non-axial orientation will prevail in the extruded pipe and increase the strength, the material being supplied to a forming space at the outer end of the extrusion nozzle by means of at least one outlet for material which material moves continuously, by rotating or oscillating in circumferential direction of the gap characterized in that the material is caused to move in the circumferential direction of the gap (2) at least adjacent the inner (7) and outer (5) defining walls of the gap (2) by means of at least one rotary tubular body (9, 14, 15, 20, 21) comprising at least one longitudinal slit (13, 17, 18, 22, 23) extending between a feed-in space (1′), for the material, and said forming space (2′) located at the outer end (4) of the extruding nozzle, in which slit said material is fed in and from which slit material is discharged to the forming space (2′). An apparatus for manufacturing extruded pipes, comprising devices for advancing plasticized material to an extrusion nozzle included in the apparatus, which nozzle comprises a circular gap, through which material is intended to pass in an axial direction, devices (5, 7, 9, 14, 15, 20, 21) being provided for rotationally moving material substantially in the circumferential direction of the gap, so that the material at least partially is caused to assume an orientation deviating from the axial direction, whereby non-axial orientation will prevail in the extruded pipe and increase the strength, at least one outlet means for material being provided, which outlet means is located and is adapted for continuously or oscillating rotatable movement in the circumferential direction of the gap, and from which outlet means the material is intended to be supplied to a forming space located at the outer end of the extrusion nozzle, characterized in that at least one tubular body (9, 14, 15, 20, 21) is rotatably disposed in said gap (2), which tubular body is intended for moving material in the circumferential direction of the gap, said material being intended to be moved in said circumferential direction at least adjacent the inner and outer walls of the gap (2), said tubular bodies (9, 14, 15, 20, 21) comprising at least one longitudinal slit (13, 17, 18, 22, 23) extending between a feed-in space (1′) for the material and said forming space (2′) located at the outer end (4) of the extrusion nozzle.
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