Plate cutting and forming: Use a five axis CNC machine to cut wood into coffin lid, side plate, bottom plate and other components, with an error accuracy controlled within ± 0.5mm. The coffin lid is usually designed in an arc shape, and the wooden board is bent into a smooth curved surface through a hot press molding machine to enhance visual aesthetics.
Mortise and tenon connection: The side panel and bottom panel are connected using "dovetail tenons" or "right angle tenons" to ensure structural stability; The coffin lid and the box are connected by hidden hinges for easy opening and closing.
Sealing treatment: Fill waterproof sealing strips in the mortise and tenon groove to prevent liquid penetration; The edge of the coffin lid is embedded with a silicone sealing strip to ensure long-term sealing. Some high-end products will be covered with moisture-proof film inside the coffin and filled with moisture absorbing materials to extend the storage time of the body.
Surface treatment: The surface treatment process of American coffins, from basic polishing to artistic decoration, is divided into two stages: basic coating and decorative treatment, emphasizing both practicality and artistic expression.
Basic coating process: Polishing and hole filling: Use sandpaper to gradually polish from coarse to fine (80 mesh to 400 mesh), ensuring a smooth and burr free surface. For hardwood with thicker wood conduits (such as oak), it is necessary to mix sawdust and glue to fill the holes, and then polish them flat.
Primer coating: First layer of water-based penetrating primer: Open wood conduit to enhance adhesion; Two layer polyurethane filling primer: Build a flat base surface and fill in subtle defects;
Three layer nitro wear-resistant primer: forms a scratch resistant layer to protect the surface of wood.
Topcoat coating: High gloss or matte polyester paint is used, and the final paint film thickness is controlled within the range of 120-150 μ m through a three coat and three bake process (with each layer having a thickness of 40-50 μ m). Some products will use UV curing paint to shorten drying time and improve surface hardness.
Decorative treatment:
Hand carving: Carving religious symbols (such as crosses, angels), floral patterns, or family badges on coffin lids or side panels, using relief or line carving techniques, with a depth of up to 3-5mm.
Metal accessory inlay: Coffin corners, handles, or locks are made of copper, silver, or gold-plated metal pieces, fixed by screws or welding. Some high-end products may be inlaid with gemstones or enamel decorations.
Interior Decoration: The coffin is lined with velvet, silk, or synthetic suede, with deep red, dark blue, or black as the main colors. The edges are designed with pleats or lace to enhance the sense of luxury.
