1. Frame System

? A. Window Frame

• The fixed part installed into the wall opening.

• Supports the sash and holds the window in place.

• Made from extruded aluminum profiles, often with Thermal Break (断桥结构).

? B. Window Sash

• The operable part of the window that opens and closes.

• It is hinged on the side and swings outward (or sometimes inward).

• Typically also aluminum, with integrated thermal insulation strips.

? 2. Thermal Break Structure

• A layer of polyamide or PVC strips inserted between the inner and outer aluminum layers.

• Prevents heat transfer, improving thermal insulation.

• Essential in energy-efficient or cold-climate applications.

? 3. Glazing Unit

• Usually double-glazed or triple-glazed insulating Glass units (IGUs).

• May include Low-E coatings, argon gas filling, and laminated or tempered glass for safety and energy efficiency.

• Held in place with glazing beads and rubber gaskets.

? 4. Hardware System

Essential for the window’s operability, security, and durability.

• Hinges – Usually stainless steel, supports the sash's weight and movement.

• Friction stays – Keeps the sash open at various angles.

• Handle – Used to lock/unlock and operate the window.

• Multipoint locking system – Enhances security and sealing performance.

• Limit stays or restrictors – Controls how far the sash can open, for safety.

• Optional: Child locks, anti-fall devices, etc.

?️ 5. Sealing System

• Rubber gaskets / sealing strips – Usually made of EPDM or silicone rubber.

• Provide air and water tightness, reduce noise and heat loss.

• Located around the sash and between the sash/frame interface.

? 6. Drainage System

• Includes hidden drainage channels inside the frame profile.

• Directs water away from the frame to avoid leakage.

• Important for exterior-opening casement designs.

?️ 7. Installation Accessories

• Expansion bolts, foam sealant, anchor brackets – Used during on-site installation.

• Flashings, sill pans – Additional protection against water infiltration.

Optional Features

• Insect screens – Can be fixed or removable, often mounted separately.

• Blinds or shutters – Sometimes integrated within the glazing unit.

• Smart sensors or remote-control systems – For modern intelligent window systems.

• aluminum alloy Casement Windows are widely used in modern buildings. Their core advantages are strong structure, good sealing performance, energy saving and environmental protection. It is composed of multiple precision components such as window frames, window sashes, glass, hardware accessories, sealing systems, thermal insulation structures and drainage designs, forming a highly integrated system.
• Each component not only plays a functional role, but also directly affects the air tightness, water tightness, sound insulation and thermal insulation performance of the entire window. Therefore, high-quality aluminum alloy casement windows are not only door and window products, but also a set of systematic and stable performance building solutions.