Chen Way Machinery — Types of Extrusion Systems in Blow Molding

Blow molding extrusion systems are primarily divided into two categories: Continuous Extrusion and Accumulator Die Head Extrusion. The critical factors in choosing between them depend on the product's dimensions and weight, as well as the required shot size.

Continuous extrusion is ideal for smaller, lightweight products. In contrast, the accumulator die head system stores molten plastic in the head before extruding it at high speeds, making it well-suited for large-scale or elongated parts.

When calculating the actual shot size, it is essential to account for the product's net weight, dimensions, and flash/trim waste to guarantee molding stability and optimal production efficiency.