Abstract: A mold base for a blow- or stretch-blow molding of thermoplastic containers having a petaloid base with 5 stems which are separated by radiating troughs with convex radially curvilinear base, the base being connected to a body with a diameter ? of 85 to 95 mm; the base includes 5 cavities separated by radiating ridge lines with concave radial ridge having a radius of 2 to 5 mm; the bases of the cavities have each a width of 1.5 to 3.5 mm and are distributed over a circular contour of diameter of base D of 60 to 66 mm; the height of the ridge line is 16.5 to 18 mm; the flanks of the ridge lines are axially concave and the tangent planes at origin form an angle of 52° to 88°.

Abstract: The invention concerns a mold base (1) for a blow- or stretch-blow molding of thermoplastic containers having a petaloid base with 5 stems which are separated by radiating troughs with convex radially curvilinear base, said base being connected to a body with a diameter ? of 85 to 95 mm; the base comprises 5 cavities (11) separated by radiating ridge lines (13) with concave radial ridge (4) having a radius of 2 to 5 mm; the bases (15) of the cavities (11) have each a width of 1.5 to 3.5 mm and are distributed over a circular contour (16) of diameter of base D of 60 to 66 mm; the height (H) of the ridge line is 16.5 to 18 mm; the flanks (17) of the ridge lines are axially concave and the tangent planes at origin form an angle of 52° to 88°.