1、 Precision steel plate forming process 1. Stamping forming Using a 900 ton hydraulic stamping machine, cold-rolled steel plates with a thickness of 3-5mm are pressed into the basic shapes of coffin lids, side plates, and bottom plates. The precision of stamping molds reaches ± 0.1mm, ensuring the flatness of the edges of the sheet metal. For example, the coffin lid needs to be bent twice at a 90 degree angle to form a double-layer reinforced structure, increasing its load-bearing capacity by 40%. 2. Automated folding and welding By using a CNC bending machine to complete the four sided folding process, the long side is bent twice at a 90 degree angle to form a U-shaped groove, and the short side is simultaneously bent to form a closed cavity. TIG argon arc welding technology is used in the welding process, with a weld strength of over 85% of the base metal, and X-ray inspection is conducted to ensure no porosity or cracks. 2、 Surface treatment and waterproofing system 1. Electrostatic powder spraying The paint booth is equipped with 20 automatic spray guns for spraying epoxy resin powder coating. By using electrostatic adsorption technology, powder particles are uniformly attached to the metal surface, and the coating thickness is controlled at 80-100 μ m. After high-temperature curing at 200 ℃, a corrosion-resistant and scratch resistant protective layer is formed. 2. Hot melt adhesive sealing technology Apply food grade hot melt adhesive at the joint of the coffin body, with a melting point of 120 ℃, and form an elastic sealing tape after curing. The waterproof test adopts the immersion method, placing the coffin in a 1-meter deep pool for 24 hours to ensure no leakage. This process achieves a waterproof rating of IPX7 for coffins. 3、 Lining system and hardware configuration 1. High temperature setting lining Polyester fiber wrinkled silk is used to form three-dimensional folds through a 220 ℃ hot pressing machine. After cutting the inner lining into different types, ultrasonic stitching technology is used to stitch them together, avoiding the risk of traditional suture detachment. The inner lining and coffin body are fixed with Velcro for easy cleaning and maintenance. 2. Intelligent lifting bed frame The bed frame is made of 304 stainless steel material and equipped with a hydraulic lifting system, with a load-bearing capacity of up to 300kg. Through extendable support rods, it can achieve 0-45 ° angle adjustment to meet the viewing needs. The mattress is made of high-density memory cotton, covered with waterproof leather, and has fixed buckles at the edges. 4、 Quality Control and Delivery Standards 1. Three level inspection system Process inspection: After each process is completed, size, weld seam, and coating thickness are checked Finished product inspection: Conduct sealing, load-bearing, and hardware function tests Factory inspection: simulated transportation vibration test to ensure packaging integrity 2. Customized services We offer over 20 color options and support laser engraving of personalized patterns. Hardware accessories include gold-plated handles, silent hinges, sealing strips, etc. The packaging is made of shockproof wooden boxes with built-in humidity control bags to ensure safe long-distance transportation. Hebei Xubing International Trade Co., Ltd. has exported its metal coffin products to Europe, America, Southeast Asia and other regions through the combination of standardized production processes and personalized customization services. The company continues to invest in research and development, further improving service efficiency.