3. DESIGNING CONTAINERS
SPECIAL SHAPES
Of course, in addition to the traditional round bottle, any other shape is acceptable provided that it can come out of the mold, which, as we have seen, normally consists of two half molds that rotate on a fixed hinge. In the case of single gobs, the maximum mold opening radius is 65°C with a minimum distance from the rotation hinge of 165.1 mm (see diagram A). In the case of a double gob on a 4”1/4 I.S. machine, the maximum opening radius is 65°C with a minimum distance from the rotation hinge of 111.1 mm for the inner mold and 219.1 mm for the outer mold (see drawing B on page 112). In the case of double gobs on a 5”1/2 I.S. machine, the maximum opening radius is 65°C with a minimum distance from the rotation fulcrum of 127.5 mm for the inner mold and 266.5 mm for the outer mold (see diagram C on page 112). We also include some drawings (cross-sections) of shaped bottles, in which you can see that in some cases the axis of the opening of the mold passes through the horizontal axis of the cross-section of the bottle. In the case of a square or rectangular bottle, it passes through the diagonal, partly in order to avoid leaving join marks on the flat surfaces and therefore to improve the part of the bottle on which the label can be applied (page 80).
DIAGRAM A I.S. MACHINE SINGLE GOB 4”1/4
BOTTLE
MOLD
A 65°C
111