By automatic continuous sandwich composite molding machine, the outer layer is a high-strength material (eg, color galvanized steel, stainless steel plate), the inner layer is a lightweight insulation material (flame retardant polystyrene, mineral wool, polyurethane, etc.) through automatic molding machines, high-strength adhesive bond between the roof fire rock wool board, pressurized, trimming, slotting, blanking from sheet metal. Sandwich only has good insulation, thermal insulation and moisture and other physical properties, but also has good mechanical properties of shear, as a contemporary popular new building materials. Please use rock wool fire retardant plate (glass wool) color steel sandwich. Caigangyanmian sandwich panel and its production process to achieve at the factory by automated equipment will rock wool and steel complex as a whole, new fire rock wool board, rock wool plate thus changing the previous required field complex way, fire rock wool board, to meet the building insulation, sound insulation, fire rock wool board wholesale, fire and other requirements of the premise, but also reached a high quality, efficient, reliable, safe target. The product is widely used in Europe after already mature sound.