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As one of the core components of lighting fixtures, the lampshade not only provides physical protection but also plays a vital role in optimizing light distribution.
Aluminum circles, as one of the primary raw materials for lampshades, offer excellent electrical and thermal conductivity, corrosion resistance, and high reflectivity.

In the lighting manufacturing industry, aluminum circles are typically processed through deep drawing and spinning to form various lampshades and reflectors, widely used in recessed lighting, industrial lighting, street lamps, and traffic signal reflectors.

1070 Continuous Cast Aluminum Circles

The 1070 aluminum circle for lampshades is a high-reflectivity lighting material made from high-purity 1070 aluminum.
With an aluminum content exceeding 99.7%, it exhibits excellent light reflection, heat conduction, and surface finish.

1070 aluminum circle discs are extensively used in LED lampshades, reflectors, ceiling lamp bases, downlight housings, and energy-saving lamp trays.
Compared with traditional materials, 1070 aluminum circles not only have outstanding formability but can also achieve 85%-95% light reflectivity after surface treatments such as mirror polishing, anodizing, or coating, effectively improving lighting brightness and energy efficiency.

Lampshade Aluminum Circle Specifications

Performance Characteristics of 1070 Aluminum Discs

1. Lightweight Design

Due to aluminum’s inherently low density, 1070 aluminum circles significantly reduce the overall weight of lighting fixtures, making installation and transportation more convenient.

2. Corrosion Resistance

1070 aluminum naturally forms a dense oxide film in air, providing excellent corrosion resistance and ensuring that lampshades maintain their optical performance and surface quality under various environmental conditions.

3. High Reflectivity

The surface of 1070 pure aluminum, after proper polishing treatment, achieves over 85% visible light reflectivity, maximizing the lighting system's luminous efficiency.

4. Thermal Reflection and Heat Dissipation

1070 aluminum provides superior thermal reflectivity and thermal conductivity, effectively reducing heat accumulation in lighting fixtures, thereby extending the lifespan of LED chips and electrical components.

5. Excellent Formability

With a Brinell hardness of 20-30, 1070 aluminum has excellent cold formability, suitable for manufacturing various stamped and drawn lighting parts.

Typical Applications

• LED lampshades and downlight reflectors

• Ceiling light bases and commercial lighting reflectors

• Pendant lamps, industrial and stage lighting reflectors

• Advertising light boxes and reflective panels

• Precision spun parts, cookware, and metal trays

1070 Aluminum Continuous Casting Process

1. Aluminum ingot / master alloy

2. Melting furnace

3. Holding furnace

4. Direct casting machine

5. Slab

6. Hot rolling mill

7. Cold rolling mill

8. Blanking (circle punching)

9. Annealing furnace (coil unwinding)

10. Final inspection

11. Packaging

12. Delivery

In this process, the continuous casting and rolling (CC) method plays a decisive role in determining the material's properties.
By precisely controlling the hot rolling temperature (casting billet heating 420-520°C, finishing not below 300°C), the process produces aluminum sheets with excellent dimensional accuracy and surface quality.

Lampshade Aluminum Circle Forming Processes

1. Deep Drawing

1070 aluminum circles possess excellent deep-drawing performance, suitable for manufacturing lampshades of various shapes.
During the drawing process, the material undergoes plastic deformation without significant thickness reduction, ensuring uniform wall thickness, structural integrity, and consistent optical performance.

2. Spinning

For symmetrical lampshade designs, metal spinning is an efficient and precise forming process.
With an elongation rate of 30%-40%, 1070 aluminum is highly suitable for spinning applications.
This technique allows manufacturers to produce lampshades ranging from simple conical forms to complex curved designs, meeting diverse lighting distribution requirements.