What techniques create hollow, lightweight forms in PVC monumental sculptures?

Creating hollow, lightweight forms in PVC monumental sculptures involves several specialized techniques to ensure both structural integrity and artistic expression. One common method is rotational molding, where PVC material is evenly distributed inside a mold as it rotates, forming a hollow shell. Another approach is vacuum forming, where heated PVC sheets are stretched over a mold and suctioned into shape, resulting in lightweight yet sturdy forms.

Additionally, sculptors often use PVC foam boards or layered PVC sheets, which are carved and bonded to create intricate hollow designs. Internal support structures, such as aluminum or fiberglass frames, can be added to reinforce the sculpture without adding significant weight. These techniques allow artists to produce large-scale, durable PVC sculptures that are easier to transport and install while maintaining visual impact.

By combining these methods, artists can achieve innovative designs that balance aesthetics, functionality, and practicality in monumental PVC art.