Production Process of Finished Mobile Toilets
The production process of finished mobile toilets mainly includes six stages: material selection, material preprocessing, modular assembly, installation of internal facilities, surface treatment, and finished product inspection.
Material Selection: Three main materials are used: fiberglass, stainless steel, and metal embossed panels. Fiberglass is laminated with resin and glass fibers, with a hollow interior structure facilitating the filling of polyurethane foam for insulation. Stainless steel sheets undergo surface passivation treatment to prevent chemical corrosion. Metal embossed panels are based on aluminum-zinc-coated steel sheets, which are formed into three-dimensional patterns using embossing equipment and then combined with polyurethane cores.
Material Preprocessing: This involves two stages: cutting and forming. CNC plasma cutting machines divide the sheets into wall modules according to 3D drawings, with cutting accuracy controlled within ±0.5 millimeters. Bending is performed using hydraulic bending machines, with the bending angle adjusted by calculating the springback coefficient. For curved components, mold hot pressing is required, and for fiberglass materials, the addition ratio of curing agents and ambient temperature must be controlled during this process.
Modular Assembly: A production line mode is adopted. The floor assembly is the first to enter the assembly station, where anti-slip aluminum plates and moisture-proof pads are bonded with structural adhesive. Wall modules are connected to the floor using special fasteners, and polyurethane foam is injected at the joints for sealing and reinforcement. The piping system is embedded within the wall cavities, adopting a same-floor drainage design to reduce the risk of blockages. Ventilation ducts are hidden within the ceiling cavity and equipped with backflow preventers to stop odors.
Installation of Internal Facilities: This follows the principle of functional zoning. Washbasins are made of one-piece ceramic bowls and fixed to stainless steel brackets with mechanical fasteners. Toilets are installed differently depending on their type; water-saving direct-flush toilets require precise calibration of the drainage pipe slope, while composting toilets need the installation of biological decomposition chambers and ventilation devices. The cables for the intelligent control system are laid along pre-embedded pipelines, with human body sensors and lighting systems integrated onto a unified circuit board.
Surface Treatment: This includes both protective and decorative processes. Metal surfaces undergo a six-step spraying process: after degreasing and phosphating, an epoxy primer is sprayed, followed by electrophoretic coating to form a uniform layer, and finally, a fluorocarbon topcoat is applied to enhance weather resistance. Internal walls are treated with an antibacterial coating containing silver ions to inhibit microbial growth. All joints are sealed with silicone sealant for secondary waterproofing.
Finished Product Inspection: This is divided into performance testing and safety verification. Airtightness testing is conducted using a positive pressure detection method, with 150 pascals of pressure applied inside to monitor for leaks. The drainage system undergoes continuous flushing tests, with the standard requiring no leakage after 200 consecutive flushes. Load testing applies a uniformly distributed load of 100 kilograms per square meter to the roof, with the structural deformation not exceeding 1/300 of the span. Electrical safety testing includes insulation resistance testing and measurement of the response time of leakage protection devices.
