Patent ID: 8463017

Claim:
A method for minimizing shrinkage and warpage of rotomoulded parts comprising: subjecting an external surface of a rotomoulded part to three-dimensional analysis by optical digitisation; subjecting the external surface and an internal surface of the rotomoulded part to three-dimensional analysis by Rx digitization; subjecting the internal surface to three-dimensional analysis by optical digitisation; subjecting the internal and external surfaces to three-dimensional analysis by Rx digitisation; keying the rotomoulded part into the mould; mapping a volume between the mould and rotomoulded part point by point; creating banks of maps for parameters by: creating a bank of maps using different resins: creating a bank of maps using different oven temperatures; and creating a bank of maps using different cooling rates; and selecting the parameters of creating a hank of maps that give a predetermined level of deformations, wherein Rx digitisation comprises computed tomography.