Process of Manufacturing Plastic Sunglasses

As an experienced eyewear manufacturer, we take pride in our expertise and attention to detail at every stage of production. Our manufacturing process begins with selecting the finest materials, followed by precision cutting and shaping to create each frame. Skilled craftsmen then assemble the components, ensuring a perfect fit and finish. Finally, each pair of eyewear undergoes rigorous quality checks to meet our high standards before reaching our customers. We are committed to delivering superior products that blend style, comfort, and durability.

Raw Material Preparation

Material Selection: Choose the appropriate materials, such as metal, plastic, or composites, based on the desired product specifications.
Material Cutting: Large blocks or sheets of raw material are cut into smaller, manageable sizes suitable for the manufacturing process.

Frame Shaping

CNC Machining: Use CNC machines to precisely cut and shape metal or plastic into the basic structure of the frame.
Injection Molding: For plastic frames, plastic granules are heated and injected into molds, forming the frame's basic structure after cooling.

Surface Treatment

Polishing: Frames undergo hand or machine polishing to smooth surfaces and remove any burrs or imperfections.
Plating or Coating: Metal frames are electroplated to prevent corrosion, while plastic frames might be coated with colors or patterns to enhance appearance.

Hinge Assembly

Hinge Welding: Metal hinges are welded onto the frame, allowing the temples (arms) to fold and unfold.
Screw Attachment: Tiny screws are used to securely attach the hinges to the temples.

Lens Cutting and Grinding

Lens Cutting: Raw lens blanks are cut to fit the specific frame size and shape.
Lens Grinding: The edges of the lenses are ground down to ensure a perfect fit within the frame.

Lens Installation

Lens Mounting: The finished lenses are carefully placed into the frame and secured in position.
Frame Adjustment: Final adjustments are made to the frame to ensure the lenses are perfectly aligned and the frame is symmetrical.

Quality Control

Dimensional Inspection: Precision tools are used to check that the frame and lenses meet exact size specifications.
Optical Performance Testing: Optical instruments assess the lenses for correct prescription, clarity, and light transmission.
Strength Testing: The frame undergoes stress tests to ensure it can withstand everyday use without breaking.