blow molding

Blow molding technology provides extra performance in maintaining package integrity and durability.

Single-wall parts that are molded in one piece can be produced with CDF's unique large-part extrusion process, in the 30 to 55 gallon range.

Since thickness and design can be carefully controlled, we regularly produce designs that meet demanding DOT standards.

The blow molding process allows us to manipulate and control such variables as wall thickness and lip design. With this technology:

• Components are typically cylindrical, but square or rectangular shapes can be made.

• A wide range of products can be produced from open or closed top light-weight liners to heavy composite bottles.

• Fittings can be added during production or molded in post-production.

Why choose cdf?

CDF has been providing blow-molded inserts since 1996. Our MACO 100-point advanced digital programmer provides precise control of material distribution and allows us to manipulate and control wall thickness and lip design more precisely than any of our competitors.

Additionally, CDF prides itself on our ability to work closely with our customers to provide cost-effective, customized container solutions.

extrusion blow-molding

In Extrusion Blow Molding (EBM), plastic is melted and extruded into a hollow tube (a parison). This parison is then captured by closing it into a cooled metal mold. Air is then blown into the parison, inflating it into the shape of the hollow bottle, container or part. After the plastic has cooled sufficiently, the mold is opened and the part is ejected.

EBM processes may be either continuous (constant extrusion of the parison) or intermittent.

Compared to injection molding, blow molding is a low pressure process, with typical blow air pressures of 25 to 150 psi. This low pressure process allows the production of economical low-force clamping stations, while parts can still be produced with textured surface finishes. The resulting low stresses in the molded parts also help make the containers resistant to strain and environmental stress cracking.