A. Continous Casting and Rolling
This is a closed, continuous process including melting, casting, surface milling, and rolling. Copper cathode (Cu ≥ 99.95%) and recycled materials are melted in a single furnace. Cu-P alloy (P content 13-15%) is added at 1.8-1.9 kg per ton of copper for deoxidation. Melting capacity is about 1 ton/hour.
After casting, the mother tube has a diameter of 90 mm and a wall thickness of 23.5 mm. It is cut to a maximum length of 19 m, with each tube weighing approximately 890 kg. The tube is straightened and surface-milled; about 4% of its weight is removed and recycled back into the furnace.
The milled tube is then rolled on a planetary rolling machine. After rolling, the tube size is Ø48–50 mm with a wall thickness of 2.3–2.5 mm, at a rolling speed of 12-18 m/min, and is coiled.
B. Combined drawing
The tube is drawn on a horizontal combined drawing machine at a speed of 40–50 m/min and coiled into a material cage with a diameter of 2.2 m for the next process.
After drawing, the tube dimension is 38 mm × 1.75 mm.
This is a closed, continuous process including melting, casting, surface milling, and rolling. Copper cathode (Cu ≥ 99.95%) and recycled materials are melted in a single furnace. Cu-P alloy (P content 13-15%) is added at 1.8-1.9 kg per ton of copper for deoxidation. Melting capacity is about 1 ton/hour.
After casting, the mother tube has a diameter of 90 mm and a wall thickness of 23.5 mm. It is cut to a maximum length of 19 m, with each tube weighing approximately 890 kg. The tube is straightened and surface-milled; about 4% of its weight is removed and recycled back into the furnace.
The milled tube is then rolled on a planetary rolling machine. After rolling, the tube size is Ø48–50 mm with a wall thickness of 2.3–2.5 mm, at a rolling speed of 12-18 m/min, and is coiled.
B. Combined drawing
The tube is drawn on a horizontal combined drawing machine at a speed of 40–50 m/min and coiled into a material cage with a diameter of 2.2 m for the next process.
After drawing, the tube dimension is 38 mm × 1.75 mm.
C. Drawing the final product
After combined drawing, the material cage is transferred to the spinner block machine for final drawing. The tube passes through a mold set consisting of inner and outer dies, gradually reducing diameter and wall thickness to the final specification. The maximum drawing speed reaches 1,000 m/min, depending on tube size. The minimum achievable diameter is 4 mm.
D. Coiling the tubes into Level Wound Coil (LWC) or Pancake coil (PC)
After final drawing, tubes are moved by crane to an LWC winding machine, pancake coil (PC) machine, or a straightening machine.
Straight tubes with diameters above 22.22 mm (beyond spinner block capacity) are drawn on a straight-tube drawing machine. Input material comes from the rolling or combined drawing process. The maximum straight-tube size is Ø42 mm.
E. Annealing
LWC and PC tubes are annealed to stabilize grain structure, maintain surface color, and reduce hardness to meet customer requirements. Annealing is performed in a protective atmosphere furnace using N₂ + H₂ gas.
Straight tubes do not require annealing.
F. Packing
Packing methods vary by product type: LWC coils are packed on wooden bobbins, PC coils in carton boxes, and straight tubes are wrapped with nylon. Packing can be adjusted to meet specific customer requirements.
After combined drawing, the material cage is transferred to the spinner block machine for final drawing. The tube passes through a mold set consisting of inner and outer dies, gradually reducing diameter and wall thickness to the final specification. The maximum drawing speed reaches 1,000 m/min, depending on tube size. The minimum achievable diameter is 4 mm.
D. Coiling the tubes into Level Wound Coil (LWC) or Pancake coil (PC)
After final drawing, tubes are moved by crane to an LWC winding machine, pancake coil (PC) machine, or a straightening machine.
Straight tubes with diameters above 22.22 mm (beyond spinner block capacity) are drawn on a straight-tube drawing machine. Input material comes from the rolling or combined drawing process. The maximum straight-tube size is Ø42 mm.
E. Annealing
LWC and PC tubes are annealed to stabilize grain structure, maintain surface color, and reduce hardness to meet customer requirements. Annealing is performed in a protective atmosphere furnace using N₂ + H₂ gas.
Straight tubes do not require annealing.
F. Packing
Packing methods vary by product type: LWC coils are packed on wooden bobbins, PC coils in carton boxes, and straight tubes are wrapped with nylon. Packing can be adjusted to meet specific customer requirements.
Commitment
Quality Assurance
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Finest Material
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