... be used to produce big hollow plastic products, such as gas tank, tool box and so on. 1) Clamping device ... construction, good rigidity, the space for mold is generous and mold changing is easy.2) Die head: Adopt ... in, first out" to keep even thickness of parison and high surface quality..3) Operation is easy; servicing is ... of automation.. 120A/B industrial open-clamp series plastic moulding machine