Method and device for forming a plastic coat on a surface

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 41/00 (2006.01) B05D 1/26 (2006.01) B29C 41/12 (2006.01) B29C 41/20 (2006.01) B29C 41/36 (2006.01) B29C 43/36 (2006.01) B29C 31/04 (2006.01) B29C 43/20 (2006.01) B29C 45/00 (2006.01) B29C 47/20 (2006.01) B29C 51/16 (2006.01) B29C 69/00 (2006.01)

Patent

CA 2470854

The invention concerns a method for producing a coat (7) on a surface (6) from a liquid or viscous plastic material (8) which solidifies once the coat is formed (7). The invention is characterized in that it consists in introducing the plastic material (8) in liquid or viscous form in a variable volume reservoir (2) whereof at least part of the inner wall is defined by a portion of said surface (6); the reservoir (2) and the surface (6) are moved relatively to each other while simultaneously decreasing the volume of the reservoir (2) so as to compress the plastic material (8) and cause it to flow through a passage (9) connecting two surface portions arranged respectively inside and outside the reservoir (2), the flow rate of the plastic material (8) through the passage (9) being selected so as to form a coat (7) on one of said surface portions (6) whereof the thickness (e) is less than the height of said passage (E). The invention also concerns a device using said method as well as objects obtained by said method.

L'invention concerne un procédé de fabrication d'une couche (7) sur une surface (6) à partir d'une matière plastique liquide ou visqueuse (8) se solidifiant une fois la couche (7) formée, caractérisé par le fait que l'on introduit la matière plastique (8) sous forme liquide ou visqueuse dans un réservoir de volume variable (2) dont au moins une partie de la paroi interne est définie par une portion de ladite surface (6); le réservoir (2) et la surface (6) sont déplacés relativement l'un par rapport à l'autre en diminuant simultanément le volume du réservoir (2) de manière à comprimer et faire écouler la matière plastique (8) au travers d'un passage (9) reliant deux portions de surface disposées respectivement à l'intérieur et à l'extérieur du réservoir (2), la vitesse d'écoulement de la matière plastique (8) au travers du passage (9) étant choisie de manière à former une couche (7) sur une desdites portions de surface (6) dont l'épaisseur (e) est inférieure à la hauteur dudit passage (E). L'invention concerne également un dispositif utilisant le procédé décrit précédemment ainsi que des objets obtenus par ce même procédé.

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