公开(公告)号：EP0751862B1

公开(公告)日：1998-10-21

申请号：EP95912497.5

申请日：1995-03-17

申请人： WAVIN B.V.

发明人： PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan ,  VISSCHER, Jan

IPC分类号： B29C55/30 ,  B29C55/26 ,  B29C47/90

CPC分类号： B29C55/26 ,  B29C47/0023 ,  B29C47/8835 ,  B29C47/903 ,  B29C47/908 ,  B29C55/30

摘要： Method and device for manufacturing biaxially oriented tubing from thermoplastic material. The method comprises forcing the tube over a mandrel (3) at an orientation temperature of the plastic material, which mandrel comprises an expansion part (5) which produces expansion in the circumferential direction of the tube. Downstream of the mandrel and axial pulling force is exerted on the tube, and the biaxially oriented tube is cooled down. At a distance downstream of the mandrel the tube is drawn through a calibration opening (12) bounded by calibration means, the calibration opening being such that it produces a reduction in the external dimensions of the tube. Accurate regulation of the external dimensions of the tube is provided by regulating the distance between the mandrel (3) and the calibration means (12), in particular depending on the external dimensions of the tube measured downstream of the calibration means.

公开(公告)号：EP0823873B1

公开(公告)日：1999-08-04

申请号：EP96913747.0

申请日：1996-05-02

申请人： WAVIN B.V.

发明人： VISSCHER, Jan ,  PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan

IPC分类号： B29C47/90 ,  B29C47/88

CPC分类号： B29C47/903 ,  B29C47/0023 ,  B29C47/0033 ,  B29C47/882 ,  B29C47/8835 ,  B29C47/884 ,  B29C47/8895 ,  B29C47/902 ,  B29C47/907 ,  B29C47/908

摘要： Method for treating an extruded plastic section having a hollow space and installation suitable for carrying out such a treatment. The installation comprises an extruder which has a core for forming the hollow space in the section, and, at a distance downstream from the extruder in the extrusion direction of the section, a closing means having a rigid circumferential wall. During operation of the extrusion installation the closing means is situated with its rigid circumferential wall along the section, thus closing the hollow space of the section. The installation further comprises first conduit means which open out near a supply orifice which is provided in the circumferential wall of the closing means, fluid feeder means for feeding fluid to the first conduit means, second conduit means which connect to a discharge orifice, the at least one discharge orifice being situated upstream of the at least one supply orifice, so that it is possible to provide, between the circumferential wall of the closing means and the extruded section, a film of fluid which flows opposite to the extrusion direction of the plastic section. The closing means may also be an expansion mandrel, for example for fabricating biaxially oriented tube sections.

公开(公告)号：EP0751860B1

公开(公告)日：1998-12-16

申请号：EP95912496.7

申请日：1995-03-17

申请人： WAVIN B.V.

发明人： PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan ,  VISSCHER, Jan

IPC分类号： B29C55/26 ,  B29C47/88 ,  B65H51/14

CPC分类号： B29C47/903 ,  B29C47/0023 ,  B29C47/0033 ,  B29C47/8835 ,  B29C47/908 ,  B29C55/26

摘要： Method and devices for manufacturing biaxially oriented tubing from thermoplastic material. The method comprises forcing the tube over a mandrel (4) at an orientation temperature of the plastic material, which mandrel (4) comprises an expansion part (6) which produces expansion in the circumferential direction of the tube. The forcing over the mandrel is achieved by exerting a pushing force on the tube upstream of the expansion part of the mandrel by means of pushing means (12) acting upon the outside of the tube, and by exerting a pulling force on the tube downstream of the mandrel. The pushing means (12) act upon the tube at a distance upstream of the mandrel, and the tube is supported between the place where said pushing means act and the expansion part of the mandrel.

摘要翻译： 由热塑性材料制造双轴取向管材的方法和装置。 该方法包括在塑料材料的取向温度下将管子压在心轴（4）上，该心轴（4）包括在管子的圆周方向上产生膨胀的膨胀部分（6）。 通过作用于管外侧的推动装置（12）以及通过在管的下游施加拉力，通过在心轴的扩张部分上游的管上施加推力来实现心轴上的推动力， 心轴。 推动装置（12）在心轴上游一定距离处作用在管上，并且管被支撑在所述推动装置作用的位置与心轴的扩张部分之间。

公开(公告)号：EP1913063A1

公开(公告)日：2008-04-23

申请号：EP06762947.7

申请日：2006-07-28

申请人： WAVIN B.V.

发明人： OVEREIJNDER, Hans ,  SCHUURMAN, Johan

IPC分类号： C08J9/12 ,  B29C44/34 ,  C08L27/06 ,  C08K5/00

CPC分类号： B29C44/3473 ,  B29C47/0023 ,  B29C47/20

摘要： Described is an article a pipe of polymer micro-foam material having an impact strength value measured at 0°C which is higher than 100% and up to 400% of the impact strength as required in the EN-norm of a pipe of the same dimensions and basic material in non-foamed condition. Also are described methods for producing such pipe. Also a die (1) for an extruder is described having, before the slit (2) thereof, a channel (3) which narrows to the slit with an angle alpha between 10 and 180°, preferably 10 and 90°. Further is described an extruder including a die according to the invention.

公开(公告)号：EP0823873A1

公开(公告)日：1998-02-18

申请号：EP96913747.0

申请日：1996-05-02

申请人： WAVIN B.V.

发明人： VISSCHER, Jan ,  PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan

IPC分类号： B29C47

CPC分类号： B29C47/903 ,  B29C47/0023 ,  B29C47/0033 ,  B29C47/882 ,  B29C47/8835 ,  B29C47/884 ,  B29C47/8895 ,  B29C47/902 ,  B29C47/907 ,  B29C47/908

摘要： Method for treating an extruded plastic section having a hollow space and installation suitable for carrying out such a treatment. The installation comprises an extruder which has a core for forming the hollow space in the section, and, at a distance downstream from the extruder in the extrusion direction of the section, a closing means having a rigid circumferential wall. During operation of the extrusion installation the closing means is situated with its rigid circumferential wall along the section, thus closing the hollow space of the section. The installation further comprises first conduit means which open out near a supply orifice which is provided in the circumferential wall of the closing means, fluid feeder means for feeding fluid to the first conduit means, second conduit means which connect to a discharge orifice, the at least one discharge orifice being situated upstream of the at least one supply orifice, so that it is possible to provide, between the circumferential wall of the closing means and the extruded section, a film of fluid which flows opposite to the extrusion direction of the plastic section. The closing means may also be an expansion mandrel, for example for fabricating biaxially oriented tube sections.

公开(公告)号：EP0751862A1

公开(公告)日：1997-01-08

申请号：EP95912497.0

申请日：1995-03-17

申请人： WAVIN B.V.

发明人： PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan ,  VISSCHER, Jan

IPC分类号： B29C47 ,  B29C55

CPC分类号： B29C55/26 ,  B29C47/0023 ,  B29C47/8835 ,  B29C47/903 ,  B29C47/908 ,  B29C55/30

摘要： Method and device for manufacturing biaxially oriented tubing from thermoplastic material. The method comprises forcing the tube over a mandrel (3) at an orientation temperature of the plastic material, which mandrel comprises an expansion part (5) which produces expansion in the circumferential direction of the tube. Downstream of the mandrel and axial pulling force is exerted on the tube, and the biaxially oriented tube is cooled down. At a distance downstream of the mandrel the tube is drawn through a calibration opening (12) bounded by calibration means, the calibration opening being such that it produces a reduction in the external dimensions of the tube. Accurate regulation of the external dimensions of the tube is provided by regulating the distance between the mandrel (3) and the calibration means (12), in particular depending on the external dimensions of the tube measured downstream of the calibration means.

公开(公告)号：EP0751860A1

公开(公告)日：1997-01-08

申请号：EP95912496.0

申请日：1995-03-17

申请人： WAVIN B.V.

发明人： PRENGER, Jan, Hendrik ,  SCHUURMAN, Johan ,  VISSCHER, Jan

IPC分类号： B29C47 ,  B29C55

CPC分类号： B29C47/903 ,  B29C47/0023 ,  B29C47/0033 ,  B29C47/8835 ,  B29C47/908 ,  B29C55/26

摘要： Method and devices for manufacturing biaxially oriented tubing from thermoplastic material. The method comprises forcing the tube over a mandrel (4) at an orientation temperature of the plastic material, which mandrel (4) comprises an expansion part (6) which produces expansion in the circumferential direction of the tube. The forcing over the mandrel is achieved by exerting a pushing force on the tube upstream of the expansion part of the mandrel by means of pushing means (12) acting upon the outside of the tube, and by exerting a pulling force on the tube downstream of the mandrel. The pushing means (12) act upon the tube at a distance upstream of the mandrel, and the tube is supported between the place where said pushing means act and the expansion part of the mandrel.