HUAYU 3‑Layer 220L Double L‑Ring Drum Blow‑Molding Machine adopts three‑layer co‑extrusion technology for chemical drum production. It supports independent layer‑thickness adjustment, high‑precision wall‑thickness control, energy‑saving servo‑hydraulic drive and heavy‑duty clamping structure. The equipment runs stably, operates easily and has a long service life, which is an ideal solution for mass‑production of 220L double L‑ring HDPE chemical drums. Applicable material HDPE