Production of Hollow Articles.

Production of plastics hollow articles - containers and bottles - is reviewed with special emphasis on two manufacturing processes: extrusion-blow molding and injection-blow molding. The machining for each process is discussed in detail, and the cooling time of fabricated articles - a factor that limits the productivity of extrusion-blow molding machinery - is considered. Programming of the wall thickness (parison) of extrusions is discussed, especially with regard to the major difficulties which occur in the production of large containers. Immersion-blow molding, a comparatively new technique, is also briefly examined.