Understanding the Types of Blow Molding Machines

Start with the forming process

Blow molding describes a family of processes for making hollow plastic parts. In extrusion blow molding, an extruder forms a molten tube, or parison. A mold closes around it and air expands it against the cavity. Injection blow molding and stretch blow molding form and handle the starting shape differently; their machines should not be treated as interchangeable.

The extrusion blow molding machine

In this range, an extrusion blow molding machine combines the extrusion and die-head system, mold clamping, blowing, controls and product handling. Product size, material, wall distribution and mold dimensions determine the suitable arrangement.

Continuous extrusion and accumulator heads

The original article distinguishes continuous-extrusion configurations used for smaller bottles and containers from accumulator-head configurations used for larger hollow products. The choice depends on the product and process requirements, including the weight of material needed for the parison.

Choose around the product

A bottle, drum, panel and technical hollow part present different requirements. Define the part geometry, resin, target weight, neck or openings, required output and finished-product checks. Then review the machine, mold and auxiliary equipment together.

Next steps

Compare the published machine range and use the selection guide to prepare your enquiry.