Extrusion blow molding is a process for manufacturing hollow plastic bottles and cans by using the machines extruder, die head, clamping unit, blowing unit and mold. Usually used for production of bigger units (weight of 350g and more).

How extrusion blow molding (EBM) machine  works?

In extrusion blow molding a plastic material is fed through a hopper onto a feeding screw, what feeds material into a blow molding die that directs the material flow to create an extruded hollow tube ("parison"). This parison drops with gravity until it is a process-specific length, which triggers the mold to close around it and seal the bottom edge. A cutting knife slices the open top of the parison and a blow pin moves to the top of the tool and inflates the parison against the walls of the tool cavity. The cooled tool walls solidify the molding and after a preset time it is ejected and the process repeats with the newly extruded parison. 

Adventages:

• Large quantities production;
• Big-size products can be produced;
• Low cost comparing with IBM or ISBM methods;
• Multilayer extrusion blow moulding is available;

Disadvantages:

• Dimensional accuracy is not as well controlled;
• Polymer selection for blow molding requires good melt strength, uniform swell characteristics and stiffness. PET and standard PP homopolymers are impossible to process;
• Long cooling time;
• Production waste;

Where to buy reliable extrusion blow molding (EBM) machines from China, Taiwan (R.O.C.), Korea?

On our website you can profitably buy any extrusion blow molding (EBM) machines from well known world manufacturers with delivery to your region. All our machines have low cost, high quality, reliability and productivity. We provide commissioning service, training, warranty and post-warranty maintenance, as well as supplying machine tool accessories and spare parts.