II. Product Features
(I) Core Advantages
1. Functional integration: The hollow structure accurately plans the layout of arc holes and long holes, which can simultaneously realize functions such as installation, weight reduction, and cable threading. For example, in mechanical equipment, it helps to lightweight equipment and integrate functions, and improve assembly efficiency.
2. Strength and protection: The ferrous metal substrate guarantees a tensile strength of ≥400MPa to resist the impact of external forces in the industrial environment; the surface treatment process (spraying/electrophoresis) forms a protective layer, which is resistant to salt spray tests for more than 480 hours and is suitable for outdoor and high humidity conditions.

3. Flexible customization: It supports customization of hollow shape (arc, special shape), size, and surface treatment color according to equipment requirements to meet the personalized design and functional adaptation of different industrial scenarios.

Features Dimension	Black metal hollow stamping parts	Conventional metal stamping parts	Application Value
Functional integration	Multifunctional hollow, suitable for assembly	Single structure	Improve equipment integration efficiency
Protection performance	480 hours salt spray protection	Weak protection	Stable in outdoor/high humidity conditions
Flexible customization	Shape and color can be customized on demand	Standardization is the main	Meet differentiated industrial design
Weight Control	Hollowing out weight reduction 10% - 25%	Heavy	Adapting to the trend of lightweight equipment

III. Product Details
(I) Process Flow
1. Mold Design: Use CAD software to accurately plan the hollow pattern and hole size. After CNC processing and heat treatment, the mold accuracy reaches ±0.03mm to ensure the consistency of stamping parts.
2. Plate Pretreatment: Flatten and level the black metal plate, remove oil stains and rust, and improve the surface roughness through sandblasting to enhance the adhesion of subsequent coatings.
3. Stamping: On a 100-600T press, blanking, hollow punching, and bending are completed at one time. The pressure is monitored in real time to avoid cracking and deformation of the plate and ensure the integrity of the hollow structure.
4. Surface treatment: Use spraying technology (optional black, gray and other colors), pre-treatment, electrostatic spraying, and high-temperature curing to form a 50-80μm thick protective layer, which is both anti-corrosive and beautiful.
(II) Applicable scenarios
 Mechanical equipment: As a mounting bracket for transmission components and a connecting piece for equipment frame, the hollow structure is suitable for cable routing, which helps the equipment to be lightweight and modularly assembled, such as automated production line equipment.
 Electronic equipment: Processing server chassis fixing seats and industrial computer heat dissipation brackets. The hollow design accelerates air circulation, while achieving precise installation of components to ensure stable operation of electronic equipment.
 Hardware frame: Used for furniture hardware and architectural decoration frames. The black metal texture and hollow aesthetics are integrated to create an industrial style appearance, such as display racks and partition brackets.
(III) Quality control
Implement "three-level quality inspection": first-piece inspection (confirming mold accuracy and process parameters), process sampling (detecting dimensions and coating thickness every 2 hours), and full inspection of finished products (three-coordinate measurement of dimensions, salt spray test to verify protective performance). Tensile testing is used to ensure that the strength meets the standard, and coating adhesion testing is used to ensure the reliability of surface processing, providing industrial equipment with core components that combine functionality and quality, enabling enterprises to produce efficiently.