Plastic Manufacturing Processes

Injection Molding – A molding process whereby a heat-softened polymer is injected from a Plastifier into a relatively cool cavity, which gives the article the desired shape.

Primarily used in making closures & components.

(IBM) Injection Blow Molding – A molding process in which heat-softened polymer is injected from a Plastifier into a mold cavity creating a Preform, which is then transferred to a Blow Mold where air is blown into the Preform, forcing it to take the shape of the Blow Mold cavity.

Ideal for bottles up to 4oz. (120ml). Larger bottles are possible.

(ISBM) Injection Stretch Blow Molding – A molding process whereby Preforms are introduced into a cavity, stretched axially by a Stretch Rod, and then blow circumferentially to the shape of the Blow Mold cavity.

Ideal for bottles 4oz (120ml) & larger.

(EBM) Extrusion Blow Molding – A molding process whereby heat-softened polymer is forced into the shape of a hollow tube. While still soft, a mold closes around the tube, pinching the top and bottom of the tube closed. A Blow Pin is introduced, and air is forced through the pin forcing the tube to take the shape of the Blow Mold cavity.

Ideal for bottles 4oz (120ml) & larger.