12-04-2012 дата публикации
Номер: US20120086148A1
A process for molding a beading particularly on the periphery of a window or for molding a plastic window, in which a constituent plastic of said beading, or of said plastic window, respectively, is introduced into a molding cavity in which at least one insert, such as a trim, has been positioned beforehand, wherein said insert is held in position in said molding cavity, while said plastic is being introduced, by suction through a plurality of fine holes emerging on the internal surface of said molding cavity. 1. A process for molding a beading particularly on the periphery of a window or for molding a plastic window , in which a constituent plastic of said beading , or of said plastic window , respectively , is introduced into a molding cavity in which at least one insert , such as a trim , has been positioned beforehand , wherein said insert is held in position in said molding cavity , while said plastic is being introduced , by suction through a plurality of fine holes emerging on the internal surface of said molding cavity.2. The molding process as claimed in claim 1 , wherein said holes have claim 1 , on the inner surface of the molding cavity claim 1 , a width of between 0.2 and 1 mm claim 1 , or even between 0.01 and 0.5 mm.3. The molding process as claimed in claim 1 , wherein said holes are separated on the inner surface of the molding cavity by an edge-to-edge distance in two perpendicular directions of between 1 and 50 mm claim 1 , or even between 2 and 30 mm.4. The molding process as claimed in claim 1 , wherein said holes have a depth of between 2 and 30 mm claim 1 , or even between 5 and 20 mm.5. The molding process as claimed in claim 1 , wherein the vacuum applied upstream of the holes is around 50 to 100 kPa claim 1 , or even around 70 to 95 kPa.6. The molding process as claimed in claim 1 , wherein the suction starts before the start of injection of the constituent plastic of said beading or of said plastic window respectively and the suction stops ...
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