The process involves placing plastic material into the injection unit and heating to a molten stage. The hot molten plastic is then forced into a mold; a short phase is allowed between the injection and the cooling of the object into its solid form to ensure that the mold cavities are completely filled before cooling begins. - See more at: http://www.interfix.co.za/main/moulding-plastic-pros-and-cons-of-injection-moulding.html#sthash.NMbRbsxz.dpuf