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Used Extrusion Blow Molding in Jiangsu, China

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Overview

Extrusion blow molding machines make hollow plastic parts by extruding a parison (a tubular melt) and inflating it inside a cooled mold. Common for bottles, drums, tanks and other seamless containers, they handle high volumes and many thermoplastics like HDPE, PET and PP. Used machines vary by clamp size, parison control and automation level — suited to manufacturers needing efficient, repeatable production of durable hollow parts.

FAQ

What should I inspect when buying a used extrusion blow molding machine?

Check extruder condition, screw/barrel wear, parison control system, clamps, hydraulic/pneumatic systems, electrical controls, cycle history and mold interfaces. Request maintenance logs and test runs with representative material.

How important is parison control and what options exist?

Parison control is critical for wall-thickness consistency. Look for variable-speed extruders, accumulator heads or computer-controlled parison programming depending on part complexity and quality needs.

What are typical shipping considerations?

Account for machine weight, dimensions, disassembly needs (extruder, hopper, molds), crating, lift points and local transport permits. Use heavy-equipment carriers experienced with plastics machinery.

How do I prepare the machine for shipping?

Drain fluids, lock moving parts, secure wiring, remove or secure molds and hoses, pack fragile controls, and document serial numbers. Label components and provide handling instructions to the carrier.

What routine maintenance keeps an extrusion blow molder reliable?

Regularly inspect screws/barrels, replace wear liners, check heater zones and thermocouples, maintain hydraulics and seals, calibrate parison control and service molds (venting, polishing, alignment). Follow OEM schedules and monitor production metrics.