Page 359 - Plastics Engineering
P. 359
342 Processing of Plastics
K and the thermal diffusivity and conductivity of aluminium may be taken as 8.6 x lo-’ m2/s
and 230.1 J/m.s.K respectively.
4.16 A billet of PVC weighing 150 g is to be compression moulded into a long playing record
of diameter 300 mm. If the maximum force which the press can apply is 100 kN estimate the time
needed to fill the mould. The density and viscosity of the the PVC may be taken as 1200 kg/m3
and 10 Ndm2 respectively.
