Large items of plastic processing machinery utilise heat and moving parts, making them potentially dangerous. This is why plexi-glass covers are used for observing plastic transformation processes.
Modern machines are CNC-controlled, which means their production runs are programmed into a computer in advance. As well as blow moulding, injection moulding and expansion, the latest plastic processing equipment performs tasks such as milling, bonding and welding. While some machines are intended for one specific form of plastic processing, others are capable of performing several.
There are many products and component parts made with plastics processing equipment of different sizes and configurations. For instance, bottles for carbonated drinks, milk and cleaning agents are made with thermoplastic processing equipment that "blows" the raw material into shape under heat. The plastic then hardens and retains its shape as it cools.