Princeton Case Company
Extrusion and injection blow molding are both reliable methods of manufacturing plastic carrying cases, but each is different enough to warrant thought and proper choice. We use high-powered machines to blow mold precise hollow areas into formed plastic parts. Our process begins with melting down plastic materials. We then take those materials and develop them into a preform or a parison (depending on the method being used).
Blow-molded cases typically come in different shapes and sizes to meet the needs of items being carried. Although the outsides of cases are generally square or rectangle, their insides are designed to house specific products. We use custom foam inserts to ensure that carried items fit like a glove.
Blow molding is done in two main processes. Below, we will go over the two types.
Extrusion blow molding extrudes plastic into a parison after being melted. Parisons are then cooled and tightly closed inside a metal mold. Compressed air is blown into the plastic, which causes the plastic to become hollow and form into the shape of the mold.
Injection blow molding is commonly used when making products on a large-scale production. Melted plastic materials get injected into a core pin that gets rotated over-molding stations as it is cooled and inflated. The final product is a hollow piece of solid plastic that meets the specifications of the mold.
To learn about which manufacturing process is best for your unique needs, you should not hesitate to give our team a call.
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