Prefabricated House Integrated Molding Method

The prefabricated house integrated molding method is a technical system that enables rapid house construction through modular design, industrial production, standardized assembly, and the combination of multiple processes. The core processes and technical points are as follows:

I. Technical Principles and Modular Design Prefabricated houses adopt a modular design concept, breaking down the house into standardized functional modules (such as walls, floors, roofs, etc.). Each module adheres to uniform size moduli and interface standards, enabling a "plug-and-play" assembly approach. During the design phase, Building Information Modeling (BIM) technology is used to integrate data throughout the entire process, simulating the spatial relationships and connection nodes between modules in advance to avoid construction conflicts and ensure precise module alignment.

II. Main Materials and Structural System The main body of the house is supported by a steel structure, providing high-strength support. The walls are made of color-steel composite panels, with a polyurethane sandwich layer that achieves efficient thermal insulation. In some processes, the steel structure framework is integrally cast with lightweight composite materials (such as polyurethane, rock wool, or foamed cement) to form composite walls that combine structural strength with thermal insulation, further enhancing house performance.

III. Full Manufacturing Process

1. Factory Prefabrication Stage: Wall modules are produced on automated production lines, using a lightweight steel structure as the framework, covered with galvanized steel sheets on the outer layer, and filled with polyurethane sandwich panels inside. Electrical and water lines are pre-embedded in prefabricated channels to avoid damaging the structure through on-site trenching.
2. Transportation Phase: Module dimensions are strictly controlled within 6 meters × 3 meters × 3 meters to fit standard container transportation. Oversized modules are transported in segments and assembled on-site to reduce logistics costs.
3. On-Site Assembly:
   • Main Frame Construction: Prefabricated steel columns and beams are assembled into a spatial structure using bolts or connectors, with an error margin controlled within ±3mm to ensure overall stability.
   • Wall and Roof Panel Installation: A water-flow-direction splicing process is used, with waterproof troughs and sealing strips added at the joints to achieve an IPX4 waterproof rating, effectively preventing leakage.
   • Installation of Supporting Facilities: Window and door frames are connected to wall modules via pre-embedded parts, and electrical lines are protected by metal wire trays, balancing safety and aesthetics.

IV. Other Key Processes Modular mold forming technology uses large presses to stamp or hot-press metal sheets or composite materials into complete wall units with pre-formed window and door openings in a single operation, reducing on-site processing steps and improving construction efficiency.