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Aluminum Round Bar Making Equipment

1. Melting Furnace

  • Purpose: Melts aluminum ingots or scrap into molten aluminum for casting.
  • Type:
    • Induction Furnace: Uses electromagnetic induction for efficient, uniform melting. Capacity: 500–2000 kg, suitable for medium-scale production.
    • Gas-Fired Reverberatory Furnace: Common in larger operations, with capacities up to 50 tons.
  • Specifications:
    • Temperature: 660–750°C (melting point of aluminum is 660°C).
    • Power: 150–500 kW for induction furnaces.
  • Relevance: Ensures a consistent molten aluminum supply for casting 7-inch round bars.

2. Casting Equipment (Hot-Top Casting System)

  • Purpose: Casts molten aluminum into round bar shapes (e.g., 7-inch diameter).
  • Components (as used in Foshan, e.g., by Nanhai Boqiang Machinery):
    • Casting Platform:
      • Upper Platform: Steel structure with refractory lining, includes a distribution launder to guide molten aluminum.
      • Crystallizer (Mold): Forms the 7-inch diameter bar; made of copper or graphite for high thermal conductivity and durability.
      • Dummy Bar (Ingot Puller): Supports and pulls the solidifying aluminum bar downward.
    • Cooling System: Enclosed water chamber with cooling water (flow rate: 50–100 L/min) to solidify the aluminum bar rapidly, minimizing defects like porosity.
    • Accessories: Graphite rings, transition plates, and distribution launders ensure uniform aluminum flow.
  • Specifications:
    • Mold Diameter: 177.8 mm (7 inches).
    • Casting Speed: 50–150 mm/min, adjustable based on alloy and diameter.
    • Output: Can produce 10–50 bars per cast, depending on platform size.
  • Relevance: Hot-top casting, as offered by companies in Foshan, is ideal for producing high-quality 7-inch aluminum round bars with minimal internal defects.

3. Extrusion Press (Alternative Forming Method)

  • Purpose: Forms aluminum round bars by extruding heated billets through a die, often used for smaller diameters or when casting isn’t preferred.
  • Components:
    • Billet Heater: Heats aluminum billets to 450–500°C.
    • Extrusion Press: 1000–2500 ton capacity, forces the billet through a 7-inch round die.
    • Run-Out Table: Cools and straightens the extruded bar.
  • Specifications:
    • Extrusion Ratio: 10:1 to 40:1, depending on die design.
    • Speed: 5–20 m/min.
  • Relevance: Extrusion is widely used for 6061-T6 aluminum round bars (as noted in prior market data), offering tight tolerances and smooth surfaces. However, for 7-inch bars, casting is more common due to size constraints in extrusion.

4. Cutting and Finishing Equipment

  • Purpose: Cuts the cast or extruded bars to desired lengths (e.g., 2.6 m to match your steel pipe lengths) and improves surface quality.
  • Components:
    • Circular Saw: Cuts bars to length with precision (±1 mm tolerance).
    • Surface Treatment:
      • Brushing Machine: Removes surface oxides or defects.
      • Anodizing Line (Optional): Adds a 10–25 µm oxide layer for corrosion resistance, critical for humid environments like Ecuador (70–90% humidity in Guayaquil).
  • Specifications:
    • Saw Blade: Carbide-tipped, 500–800 mm diameter.
    • Anodizing Tank: 5–10 m long, uses sulfuric acid electrolyte.
  • Relevance: Ensures the 7-inch aluminum round bars meet your length and surface quality requirements for export or equipment manufacturing.

5. Quality Control Equipment

  • Purpose: Ensures the round bars meet mechanical and dimensional standards.
  • Components:
    • Ultrasonic Tester: Detects internal defects like porosity or inclusions.
    • Hardness Tester: Measures Brinell hardness (e.g., 95 HB for 6061-T6).
    • Spectrometer: Verifies alloy composition (e.g., 6061: 0.8–1.2% Mg, 0.4–0.8% Si).
  • Relevance: Critical for ensuring the bars’ tensile strength (310 MPa for 6061-T6) and suitability for your applications (e.g., machining into equipment parts).

6. Auxiliary Equipment

  • Degassing Unit: Removes hydrogen gas from molten aluminum to reduce porosity in the final bar.
  • Filtration System: Uses ceramic foam filters to remove impurities, improving bar quality.
  • Cooling Water System: Recirculates water (200–500 L/min) to maintain mold temperature during casting.

Environmental and Operational Considerations

  • Corrosion Resistance: Equipment should have protective coatings (e.g., epoxy or galvanized) for durability in humid environments like Ecuador.
  • Power Supply: 380V/50Hz, 3-phase, common in China; adjustable to 120/240V, 60Hz for Ecuador.
  • Safety Features: Emergency stops, protective guards, and temperature sensors to prevent overheating.

Sourcing in Foshan, China

  • Recommended Supplier: Foshan Nanhai Boqiang Machinery Equipment Co., Ltd. (as previously identified) provides hot-top casting systems tailored for 7-inch aluminum round bars.
    • Location: Nanhai District, Foshan, Guangdong, China.
    • Contact: Phone: 0757-85850560, Email: qiang134@126.com.
  • Logistics: Equipment can be shipped from Guangzhou or Shenzhen Port to Guayaquil Port, avoiding U.S. tariffs (e.g., Trump’s 79% tariff on Chinese goods as of April 2025).

Practical Implications for Your Use Case

  • Application: The 7-inch aluminum round bars can be used to machine components for your steel strapping production line (e.g., rollers for the straightening machine or supports for the uncoiler/pallet mover [Previous Artifacts]).
  • Export: The equipment ensures high-quality bars for export to Ecuador or Algeria, suitable for humid conditions when anodized.
  • Integration: Can be paired with your existing production setup in Tianjin, enhancing your ability to produce or utilize aluminum components alongside steel strapping and pipes.

If you need detailed schematics, a supplier comparison, or integration plans, I can assist further!

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