A hand blow molding machine is a specialized piece of machinery used to create plastic bottles through a labor-intensive, manual process. In order to mould a plastic preform into the proper container, this procedure involves blowing compressed air into it. When there is a very little amount of production and the labor cost advantage surpasses the inefficiencies of manual operation, these machines are chosen. 

Each step of the blow molding process requires a lot of physical labor when using a hand blow molding machine. It is appropriate for small-scale enterprises, low-volume production, and circumstances where automation would not be financially viable.