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Qingdao Hailong Machinery Technology Co., Ltd. is one of the leading manufacturers and suppliers of die cast door frame in China, featured by quality products and good service. Welcome to buy durable die cast door frame made in China here and get pricelist from our factory. Also, customized service is available.

Core Product Features

Lightweight Material & Energy Efficiency: Adopts ADC12/A356/A6061 high-performance aluminum alloy with density only 2.7g/cm³, 40%-50% lighter than traditional steel frames, single set weight ranges from 3-8kg, effectively reducing vehicle fuel consumption and carbon emissions, meeting the lightweight needs of new energy vehicles; tensile strength ≥280MPa, yield strength ≥220MPa, and impact resistance meets standards.
Precision Die-Casting & Accurate Dimensions: High-pressure die-casting process, dimensional tolerance ≤±0.1mm/m, flatness of key assembly surfaces ≤0.05mm/m, hole tolerance ≤±0.03mm; integrated die-casting forming without welding, avoiding stress concentration, structural strength far exceeding stamping and welding frames, door opening and closing life ≥100,000 times without deformation.
Optimized Structure & Performance Adaptation: 
Safety Protection: Built-in anti-collision reinforcing beam structure in the frame, torsional stiffness ≥1500N·m/rad, which can effectively disperse impact force during side collision and protect passengers' safety;
Sealing Adaptation: Frame design fits window glass and sealing strips, pre-reserved precise installation slots, sealing gap ≤0.5mm, excellent waterproof, dustproof and sound insulation effects (sound insulation ≥35dB);
Easy Assembly: Integrates door lock mounting seat, hinge connection position, glass guide rail and other integrated structures, reducing the number of parts and improving assembly efficiency by 30%.
Corrosion & Wear Resistance & Longevity: Surface treated with anodizing/electrophoresis/powder coating, salt spray test ≥500 hours without rust, strong weather resistance, adapting to complex service environments such as high temperature, high humidity and dust, service life synchronized with the vehicle (≥10 years).
Full-scenario Adaptation & Strong Customization: Adapts to various models such as sedans, SUVs, MPVs and light trucks, supports customization of front door, rear door and tailgate frames, can accurately develop contour dimensions, installation interfaces and functional holes according to customer body drawings, compatible with electric/manual windows, intelligent door locks and other configurations.

Core Process Advantages

Independent Mold Development: In-house high-precision mold workshop, adopting CAD/CAE simulation optimization design, supporting customization of frame structure, reinforcing rib layout and assembly interfaces according to vehicle parameters, reducing prototyping cycle by 25%
Full-process Quality Control: Raw material spectral inspection → die-casting temperature/pressure monitoring → X-ray flaw detection → dimensional accuracy testing → surface treatment inspection, providing complete test reports for each batch, quality traceable
Cross-process Collaboration: Direct connection to machining and surface treatment workshops after die-casting, one-time processing of key assembly surfaces and holes, avoiding precision deviation caused by secondary transportation, improving delivery efficiency by 30%

Application Scenarios

Passenger Cars: Supporting front doors, rear doors and tailgates of sedans, SUVs and MPVs
Commercial Vehicles: Core frame components of doors for light trucks, vans and buses
New Energy Vehicles: Lightweight door system customization for pure electric and hybrid vehicles
Special Vehicles: Customized door frames for modified cars and RVs

Typical Application Cases

Passenger Car - New Energy SUV Supporting: Customized A356 aluminum alloy die-casting door frames (single set weight 5.2kg) for a well-known new energy vehicle enterprise, adapted to medium-sized SUVs, 45% lighter than steel frames, has been batch supporting 150,000 complete vehicles, 100% smooth door opening and closing rate, no deformation feedback.

Commercial Vehicle - Light Truck Door Frame: Supplied ADC12 aluminum alloy die-casting frames (single set weight 7.8kg) for 3.5-ton light trucks, torsional stiffness up to 1800N·m/rad, bump-resistant and impact-resistant, applied in more than 8,000 vehicles, service life ≥8 years under harsh road conditions.

Passenger Car - Family Car Supporting: Customized A6061 aluminum alloy lightweight door frames (single set weight 3.6kg) for compact sedans, integrating glass guide rails and door lock mounting seats, assembly efficiency improved by 35%, supporting a best-selling model of an automaker, annual supply volume over 200,000 sets.

Quality Assurance

Test Reports: Provide raw material quality reports, mechanical property test reports, dimensional accuracy reports, X-ray flaw detection reports, salt spray test reports
After-sales Commitment: Free replacement of unqualified products within 24 months for non-human damage; provide lifelong technical consultation and assembly adaptation guidance
Quality Standards: Strictly comply with GB/T 15114-2021 Aluminum Alloy Die Castings Standard, ISO 643-2018 Die Castings Dimensional Tolerance Standard

Main Technical Specifications (Standard Models)

Parameter Type	Specification Range
Material Grade	ADC12, A356, A6061 Aluminum Alloy
Single Set Weight	3kg-8kg (Customizable)
Dimensional Tolerance	≤±0.1mm/m
Key Accuracy	Flatness ≤0.05mm/m; Hole Tolerance ≤±0.03mm; Sealing Gap ≤0.5mm
Mechanical Properties	Tensile Strength ≥280MPa; Yield Strength ≥220MPa; Torsional Stiffness ≥1500N·m/rad
Corrosion Resistance	Salt Spray Test ≥500 Hours (No Rust)
Sound Insulation Effect	≥35dB
Service Life	≥10 Years (Synchronized with Vehicle)
Adaptable Models	Sedans, SUVs, MPVs, Light Trucks, etc. (Customized by Drawings)