Patent ID: 6015518
Filing Date: 2000-01-18
Classification: B28B,B29C

Abstract:
A method for manufacturing a device for conducting fluid between a duct and a space comprising the steps of p1 providing first and second mating mold parts,placing in the first mold part a first mixture of curable plastic and first particles of a selected size and forming a layer from the mixture using the first and second mold parts,compacting the layer under a first compacting pressure and removing the second mold part,providing a third mold part having molding cavities for a duct connector and matable with the first mold part,covering the layer in the first mold part with a second mixture of curable plastic and second particles larger than the first particles,with the first and third mold parts, compacting the second mixture with a second compacting pressure lower than the first compacting pressure,curing the plastic,filling the duct connector molding cavities and coating an inner surface of the third mold part, and portions of the first mold part not covered by the layer, with curable plastic, andjoining the first and third mold parts and curing the plastic to form a one-piece device.