Patent ID: 7311871
Filing Date: 2007-12-25
Classification: B29C,Y10T

Abstract:
1. Process for foaming around a peripheral edge area of a cover for a motor vehicle roof, comprising the steps of: placing the cover on or in a foaming tool, and feeding a single foam mass into the foaming tool such that two foam mass fronts are formed from the single mass which run around the peripheral edge area of the cover in opposite circumferential directions and merge with one another in a merging area at an opposite side of the cover from that at which the foam mass was fed into the foaming tool, said opposite side of the foaming tool being provided with a vent in the merging area, wherein, for preventing inclusion of gas bubbles into the foam mass within the merging area, a foaming cross section of the foaming tool is reduced in the merging area at a side of the foaming tool which is opposite the vented side of the foaming tool relative to a foaming cross section of areas which border the merging area, the reduction in the foaming cross section being produced in a gradual manner at both ends of the merging area and being in a direction toward the vent of the foaming tool.