Method and apparatus for control of plastics tube...

B - Operations – Transporting – 29 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B29C 55/26 (2006.01) B29C 47/90 (2006.01)

Patent

CA 2521666

A continuous process for producing oriented plastic tube is disclosed having the steps of extrusion (12) of a tube to an initial extruded diameter, temperature conditioning (18), diametrical expansion (20) and cooling (30), characterised by control of the circumferential draw ratio by the step of adjusting the diameter of the extruded tube to an adjusted diameter by means of a variable diameter calibrator (13) located between said extrusion and temperature conditioning steps. A process line for carrying out the invention is also disclosed. Further embodiments of the invention include adjustment of the extruded wall thickness and compensatory adjustment of the adjusted diameter so as to effect a change in final wall thickness with unchanged draw ratio, a process for changing final product diameter and a start-up procedure for the process.

L'invention concerne un processus de production en continu de tubes en plastique orientés qui comporte les étapes d'extrusion (12) d'un tube d'un diamètre initial extrudé, de conditionnement de température (18), de dilatation diamétrale (20) et de refroidissement (30), qui se caractérisent par la maîtrise du rapport d'étirage circonférentiel lors du réglage du diamètre du tube extrudé à un diamètre ajusté à l'aide d'un appareil d'étalonnage de diamètre variable (13) placé entre lesdites étapes d'extrusion et de conditionnement de température. L'invention concerne également une chaîne de processus pertinente. D'autres modes de réalisation concernent le réglage de l'épaisseur de paroi extrudée et le réglage compensatoire du diamètre réglé de façon à effectuer une modification au niveau de l'épaisseur de paroi finale, le rapport d'étirage restant inchangé, un procédé de modification du diamètre du produit final et un mode opératoire du démarrage dudit procédé.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for control of plastics tube... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for control of plastics tube..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for control of plastics tube... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1437577

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.