In injection moulding, meeting the increasing requirements concerning the surface quality and dimensional accuracy poses a real challenge. Processors demand tension-free and non-deforming workpieces that provide excellent moulding ac-curacy and seamless perfect surfaces in high polish quality. Since the early 1990s, the main innovation driver has been the microsystem technology with its demand for micro components. While moulding accuracy remains the main concern, the focus has gradually shifted towards improved surface quality, dimensional accuracy and efficiency. These requirements were the driving forces for the initial development of variothermal temperature control. Innovative mould technologies and valve designs have enabled manufacturers to opt for efficient variothermal temperature control in serial production, introducing the technology in the automotive and consumer goods industries, including the production of flat screen TVs.