Panel of roofing shingles
View Patent ↗A roofing panel, a roof, an array of roofing panels, and a method of manufacturing a roofing panel by transporting a capstock layer of the roofing panel through a moving belt mold, and forming a polymeric material in situ against the outer layer while in a mold cavity of the moving belt mold. The capstock layer is vacuum formed to shape and form a plurality of roofing shingles and to impress the shingles with surface topography features simulating natural materials.
1. A method of manufacturing a panel of roofing shingles having a capstock layer of polymeric material and a base layer of polymeric foam material, comprising:
extruding the polymeric foam material separate from a precursor of the capstock layer by extruding a separate polymeric foam material;
extruding the precursor of the capstock layer separate from the polymeric foam material, by extruding a separate precursor with a nailing edge and an L-shaped cross section in which a short side of the L-shaped cross section forms the separate precursor having butt edges of the shingles, and a long side of the L-shaped cross section forms the separate precursor having multiple roofing shingles of different lengths and different heights to simulate randomly arranged shingles of different lengths and height, wherein each of the shingles is formed with substantially the same volume of the capstock layer to receive and fill with adequate polymeric material to avoid voids in the polymeric material caused by inadequate filling, followed by;
combining the separate precursor with the separate polymeric foam material within a belt mold;
transporting the precursor and the polymeric foam material within the belt mold, while one half of the belt mold forms and shapes the precursor to form the capstock layer with a shape and surface topography of multiple roofing shingles; and
heating the polymeric foam material within the belt mold, while foaming and shaping the polymeric foam material within the belt mold in situ against the capstock layer, and while bonding together the polymeric foam material and the capstock layer within the belt mold to form the panel of roofing shingles.
2. The method of claim 1 , further comprising:
cutting the precursor to a desired length prior to introducing the precursor into the belt mold.
3. The method of claim 1 , further comprising:
cutting the panel of roofing shingles to a desired length.
4. The method of claim 1 , further comprising:
forming an R-value thickness of the polymeric foam material within the belt mold.
5. The method of claim 1 , wherein, said bonding together the capstock layer and foam polymer material includes forming a melt bond of the capstock layer and the foam polymeric layer at a melt temperature of the foam polymeric material below the melt temperature of the capstock layer.
6. The method of claim 1 , wherein, said bonding together the capstock layer and the foam polymeric material includes melt bonding the capstock layer and the polymeric material while both are in the belt mold.
7. The method of claim 1 , further comprising:
drawing the precursor against the belt mold by a vacuum.
8. The method of claim 1 , further comprising:
indenting the previously extruded capstock layer with projections that extend into the belt mold to form fastener receiving recesses in the capstock layer.