In the Injection Stretch Blow Moulding (ISBM) process, the raw material is first dried in a resin dryer, to get the desired dew point. This process is divided into two parts i.e. perform making and Blowing. There are two type of technologies:

Single stage: Single stage is a process wherein directly dried resin is passed through injection barrel from where the molten material is transferred into injection mould to make perform. Hot performs are automatically transferred to conditioning zone where performs are cooled as desired and reheated to get proper orientation from here again performs are transferred automatically to blowing zone and final product is made and shifted to ejecting station. There is no manual handling in these machines.

Two stage: Two stage is a process where injection moulding machines are used to make the preforms and in a separate blowing machines performs are fed to get the final product.

The single-stage process is usually done using one machine, where the two-stage process uses preforms that have already been made and cooled.  This allows companies to either make or buy their own performs.