Extrusion Blow Molding Process

blow molding process
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Extrusion Blow Molding Process

Plastic extrusion blow molding uses a similar process to glass blowing and can be used to produce hollow plastic containers, bellows, and parts.

Steps for Extrusion Blow Molding Products:

1. The heated die head extrudes a molten plastic tube (parison) in between two mold halves.
2. The mold closes on the parison holding it in place.
3. Air is blown into the parison inflating it into the shape of the mold.
4. Air continues to blow while the part is cooled by the mold.
5. The mold opens and the moil and tail are trimmed.
6. Part is finished and ready for packaging.

Extrusion Blow Molding Solutions

Here at North American Plastics, we offer comprehensive in-house extrusion blow molding solutions for any project from start to finish. We have a streamlined onboarding process and can begin working with you on a new or existing project at your convenience.

Learn more about what we offer below or fill out our contact form on the sidebar.


We offer a wide variety of services such as fully automated work cells, post mold machining, kitting, assembly, and other secondary operations making us your “One Stop Shop.” Learn more here.

Industries and Operations

We have over 80 years of combined experience serving a wide variety of industries. Learn more here.


Our engineers are ready to assist you with a new product design or help you adapt your existing part to extrusion blow molding. Learn more here.


View our comprehensive list of materials we commonly mold. Learn more here.

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