3‑Layer Co‑extrusion 5000L Blow Molding Machine | Reliable Equipment for Chemical & Water Storage Tank Production

1.Overview 

Huayu 5000L 3-layer blow molding machine is a heavy-duty hollow forming equipment independently developed by Huayu Machinery with more than 20 years of experience in plastic machinery manufacturing. This model is specially designed for producing large 5000-liter multi-layer plastic storage tanks, widely used in chemical liquid storage, water treatment, environmental protection engineering and other industries. The three-layer co-extrusion structure endows finished tanks with excellent barrier performance, anti-aging property and mechanical strength. Compared with single-layer containers, it can effectively prevent liquid permeation and resist corrosion from most chemical raw materials. The machine supports continuous long-cycle production and meets the high-capacity production demands of large plastic container factories at home and abroad.

2.Core Structural Advantages 

The whole machine adopts an integrated heavy frame structure, which greatly improves rigidity and stability during high-load operation, reducing vibration and machine deformation in long-time working conditions. The three groups of extrusion systems work synchronously to realize uniform co-extrusion of three different plastic materials. Each extrusion unit is equipped with high-efficiency screw and barrel, ensuring stable plasticizing quality and consistent melt output. The mold clamping unit features large clamping force, which can tightly lock the mold when forming huge 5000L tank bodies, avoiding flash and uneven wall thickness on product edges. The mold opening and closing action runs smoothly with low noise and long service life.

3.Precision Wall Thickness Control 

Our professional wall thickness control system is the key guarantee for high-quality large tank production. It can dynamically adjust the parison thickness in real time in multiple axial points during blank extrusion. Operators can set different thickness parameters according to product requirements. The parison will be thicker at stress-bearing positions and thinner at non-key areas, saving raw materials while ensuring the overall impact resistance of the 5000L tank. This intelligent adjustment reduces material waste and lowers your production cost. Even for large-volume products, wall thickness deviation can be controlled within a reasonable range, greatly lowering product reject rate.

4.Material Compatibility & Application Fields

This 5000L three-layer blow molding machine is compatible with multiple raw materials including HDPE and modified polyethylene. Different material formulas can be matched for inner, middle and outer layers to realize differentiated functions: the inner layer can resist chemical corrosion, the middle layer can add barrier material to block solvent penetration, and the outer layer provides anti-ultraviolet and anti-aging performance for outdoor use. Finished 5000L plastic tanks are popular for chemical reagent storage, farm water storage, environmental waste liquid collection, municipal water supply projects. It is a preferred production equipment for plastic container manufacturers focusing on large-volume storage containers.

5.After-sales & Technical Support 

Huayu provides full-cycle service for overseas and domestic buyers. Before delivery, our technical team conducts machine testing and trial production to verify equipment performance. We supply installation guidance, on-site commissioning, operator training after machine arrival at your factory. We offer long-term spare parts supply and remote technical troubleshooting. Our engineers can also customize molds and adjust machine parameters according to your special product requirements. We keep optimizing equipment performance to help customers gain stable production capacity and competitive products in the plastic container market.