How to Make Prefabricated Parts for Mobile Homes

The production of prefabricated parts for mobile homes requires a systematic process, with core steps including design decomposition, material processing, module assembly, and quality inspection. For container-type homes, additional steps such as steel pre-treatment and composite wall fabrication are required.

1. Preliminary Design and Module Decomposition

Designers need to decompose the overall building into transportable module units based on the home's purpose (e.g., residential or office) and structural requirements. During this phase, it is crucial to consider the interface compatibility of the load-bearing system, insulation layer, waterproof layer, and electrical conduits to ensure precise alignment between modules. The design process involves using 3D modeling software for structural calculations to verify dimensional accuracy and connection reliability, thereby avoiding on-site assembly errors. For example, bolt holes must be reserved at the connection points between walls and floors, and the thickness of the wall panels must match the window and door frames.

2. Material Preparation and Frame Processing

Mobile homes primarily use lightweight steel structures as their main framework. Processing plants achieve automated production using steel beam cutting machines and welding robots. Steel is cut to specified lengths according to design drawings and then assembled into frames using carbon dioxide gas shielded welding. Critical welds undergo non-destructive testing to ensure strength. Meanwhile, wall panels (such as sandwich panels and OSB boards) are cut to module dimensions on another production line and pre-drilled for fixing screws. For container-type homes, an additional steel pre-treatment step is required: the steel is first cleaned of surface oxide scale using a shot blasting line and then sequentially coated with primer, intermediate coat, and topcoat to form a corrosion-resistant layer.

3. Module Assembly and Interior Construction

Workers complete module assembly in a sequential manner on an assembly line: first, wall panels are installed and filled with insulation material (such as rock wool or polyurethane foam), followed by fixing window and door frames and performing waterproof sealing. Strong and weak electrical conduits are embedded within the walls or floors, and ventilation ducts are installed simultaneously with the water and electricity systems to ensure that modules only require interface connections upon arrival at the site. Some processing plants use robots to spray wall surfaces, improving construction efficiency and uniformity. The walls of container homes adopt a 'sandwich' structure: the inner and outer layers are colored steel plates or galvanized steel plates, with flame-retardant rock wool filled in between, fixed using high-strength adhesives and mechanical interlocking to balance strength and insulation performance.

4. Quality Inspection and Debugging

Assembled modules undergo multiple inspections: structural strength tests verify the load-bearing capacity of the frame, airtightness checks ensure no air leaks, water and electricity conduits undergo pressure tests to prevent leakage, and the flatness of the finished surfaces must meet standards. Some factories have simulated environment test chambers to verify module performance under extreme temperatures (e.g., -30°C to 50°C) or humidity (above 90%RH). Only modules that pass all inspections are marked as qualified products and enter the finished product storage area for shipping.