Shaping process for producing moldings with at least one...

B - Operations – Transporting – 29 – C

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B29C 70/64 (2006.01) B08B 17/06 (2006.01)

Patent

CA 2478834

The invention relates to shaping methods for producing shaped bodies with at least one surface (X), which has self-cleaning properties and elevations formed by microparticles (P), by thermally shaping materials containing organic compounds by means of a shaping tool, and additionally relates to shaped bodies produced in this manner. According to the inventive method, surfaces having self-cleaning properties are produced by applying microparticles to the inner surfaces of the shaping tool before the thermal shaping, whereupon the shaping is carried out during which the microparticles are pressed into and anchored in the surface of the shaped body that is not yet solidified. The inventive method can be used in thermal shaping methods selected among blow molding, extrusion blow molding, extrusion stretch blow molding, injection blow molding, injection stretch blow molding, thermoforming, stretch forming using negative pressure, stretch forming using positive pressure, and rotational thermoforming. This method is suited for producing three-dimensional objects such as bottles, housing parts, barrels and many other objects.

La présente invention concerne un procédé de formage pour produire des corps moulés qui présentent au moins une surface (X) dotée de propriétés autonettoyantes et présentant des parties en saillies formées par des microparticules (P), par formage thermique de matières présentant des composés organiques, au moyen d'un outil de moulage, ainsi que des corps moulés ainsi obtenus. Selon le procédé de l'invention, des surfaces dotés de propriétés autonettoyantes sont produites, grâce à une application, avant formage thermique, de microparticules sur la surface intérieure de l'outil de moulage, puis à un formage au cours duquel les microparticules sont comprimées et ancrées dans la surface pas encore solidifiée du corps moulé. Le procédé de l'invention peut être mis en oeuvre dans le cadre de procédés de formage thermique qui peuvent être le soufflage, l'extrusion-soufflage, l'extrusion-étirage-soufflage, l'injection-soufflage, l'injection-étirage-soufflage, l'emboutissage, l'étirage à basse pression, l'étirage à haute pression, et l'emboutissage rotatif. Le procédé convient à la production d'objets tridimensionnels tels que des bouteilles, des pièces de boîtier, des barils, et de bien d'autres objets.

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