CONTINUOUS VENTING OF A COVERING SHEET FOR AN IN-SITU LAMINATION PROCESS

A method of venting a rear facer sheet (200) for lamination is accomplished by continuously drawing the rear facer sheet (200) through a perforating device (206) which creates conical apertures in the rear facer. Two metal rails (91) affixed to opposing edges of a front facer (33) are continuously d...

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Bibliographische Detailangaben
Hauptverfasser:	DAVIDSON, DEWAYNE J, KRIDEL, MICHAEL D, SWASEY, JR., RICHARD H
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of venting a rear facer sheet (200) for lamination is accomplished by continuously drawing the rear facer sheet (200) through a perforating device (206) which creates conical apertures in the rear facer. Two metal rails (91) affixed to opposing edges of a front facer (33) are continuously drawn into a laminator (204) after first having an expanding foam material (239) continuously deposited onto the upper surface of the front facer (33). The perforated rear facer is continuously drawn into the laminator (204) and affixed to the two metal rails (91), creating an enclosed volume in which the expanding foam is located. The apertures (208) in the rear facer allow for the escape of gasses and air during lamination, promoting even flow and uniform density of the foam material (239). The perforating device (206) has an upper and a lower rotating cylinder (210,212), the lower cylinder (210) being equipped with piercing elements and the upper cylinder (212) being equipped with grooves corresponding to the piercing elements. L'invention porte sur un procédé de ventilation d'une feuille de surface arrière (200) pour une lamination, qui est accompli par l'aspiration en continu de la feuille de surface arrière (200) à travers un dispositif de perforation (206) qui crée des ouvertures coniques dans la surface arrière. Deux rails métalliques (91) fixés à des bords opposés d'une surface avant (33) sont aspirés en continu à l'intérieur d'un laminateur (204) après avoir tout d'abord amené un matériau de mousse expansible (239) à être déposé en continu sur la surface supérieure de la surface avant (33). La surface arrière perforée est aspirée en continu à l'intérieur du laminateur (204) et fixée aux deux rails métalliques (91), créant un volume fermé dans lequel la mousse expansible est située. Les ouvertures (208) dans la surface arrière permettent l'échappement de gaz et d'air pendant la lamination, favorisant un écoulement régulier et une densité uniforme du matériau en mousse (239). Le dispositif de perforation (206) a des cylindres tournants supérieur et inférieur (210, 212), le cylindre inférieur (210) étant équipé d'éléments de perçage et le cylindre supérieur (212) étant équipé de rainures correspondant aux éléments de perçage.