Production Process of Container Houses
The production process of container houses mainly includes steel pre-treatment, frame welding, enclosure panel installation, surface anti-corrosion treatment, and other processes, while establishing a full-process inspection system to ensure quality.
Steel Pre-treatment: After the steel arrives at the factory, it needs to be straightened, descaled, and cut. Straightening can eliminate the bending deformation that occurs during steel transportation, ensuring that its straightness meets the requirements. Descaling removes impurities such as rust and oxide scale on the surface of the steel, improving the adhesion between the steel and subsequent coatings. Cutting involves cutting the steel into appropriate sizes and shapes according to design requirements to prepare for subsequent processing.
Frame Welding: Automatic welding equipment is used to combine section steels such as channel steels and square tubes into a box frame. The welding quality of the frame is crucial as it directly determines the overall rigidity of the house. To ensure welding quality, the factory is equipped with weld inspection instruments for sampling inspections. Non-destructive testing methods are used to check for internal defects in the welds, such as pores and cracks.
Enclosure Panel Installation: After the frame is completed, the floor, wall, and roof panels are installed. These panels are usually made of fire-resistant rock wool sandwich panels, which have both thermal insulation and flame-retardant properties. Some manufacturing processes are relatively complex. For example, in floor panel production, wooden frames are formed by nailing chair legs to the floor panels made of polyurethane boards. Glass fiber is laid as floor insulation, followed by covering with rough flooring. Tile adhesive is applied, and then floor tiles or wooden floors are laid. In wall panel production, upright rods are nailed every 40 centimeters on the prepared sol panels. Crossbars are used to reserve space for windows. A large number of steel nails are used to strengthen the structural strength. Adhesive is sprayed, and plywood is bonded to the lower part of the box wall structure. Steel nails are driven in to make it permanently firm, forming the box wall.
Surface Anti-corrosion Treatment: Anti-rust primers and topcoats are sprayed on the steel components to form a double-layer anti-corrosion coating. This step can effectively cope with moisture and rain and snow erosion in outdoor environments, extending the service life of container houses.
Other Processes: According to different needs, in some container house manufacturing processes, more crossbeams are added inside the containers, and the bottom and one side are cut away. When the house consists of two floors, the first floor is formed by the对接 (butt joint, you may need to find a more appropriate English term based on the actual situation, here just keep the original Chinese pinyin for reference, maybe 'butt-jointing') of two boxes. Horizontal steel beams are added to the bottom of the boxes, and ultra-strong adhesive is used to bond and reinforce the gaps in the middle to prevent rain leakage and water seepage. The adhesive at this position needs to be applied three times repeatedly. To cope with cold winters, 10cm-thick polyurethane insulation panels (extra-hard foam boards) are added to the exterior walls, and manufacturers add fire-resistant raw materials during manufacturing.
In terms of quality control, container house manufacturers usually establish a full-process inspection system from raw materials to finished products to ensure that product quality meets standards.
