The process of blow molding machine is using preforms to make plastic bottles. The preforms are produced with the necks of the bottles, including threads on one end. The preforms are heated typically by infrared heater, then blown using high-pressure air
Trapezoidal roofing roll forming machine produce roofing, wall panels and door panels for building appliances and transportation. It has many advantages such as easy installation, short construction period, beautiful appearance, light weight but high stre