... 3.low mould cost 4.mould material aluminum A356 decorative lighting rotational moulding shellRotational moulding or Roto Molding which is a ... , low volume, low pressure thermoplastic forming process .It mainly suite for producing hollow, one piece parts such as large oil or ... products we had developed have Music Box, Oil Box, Toys for Children, Water Tank, Clothes Cart, Cone Barrel, Dividing road cone ...