II. Detailed Explanation of the Production Process
1.Raw Material Preparation
Gypsum Powder: Select high-quality natural gypsum ore and finely grind it into gypsum powder that meets the production standards to ensure the stable quality of the products.
Additives: Add modified starch, retarder, foaming agent, water reducer and other additives in precise proportions to optimize the performance of the gypsum board.
Facing Paper: Select special facing paper with high strength and good water resistance to provide good protection and decorative effects for the gypsum board.
2.Ingredient Mixing
2.1.After quantitative measurement, modified starch, retarder, pulp, water reducer, water, etc. are put into a hydraulic pulper and stirred into a uniform raw material slurry, which is then pumped into the slurry storage tank for standby.
2.2.The foaming agent and water are put into the foaming agent preparation tank in a specific ratio, stirred evenly, and then pumped into the foaming agent storage tank with a heating device (maintained above 35°C) for standby.
2.3.The accelerator and gypsum powder raw materials are fed into the silo for standby through the lifting and conveying equipment.
2.4.The slurry in the slurry storage tank is pumped into the mixer using a metering pump. The foaming agent enters the mixer after being foamed by the dynamic foaming device. The accelerator and gypsum powder enter the mixer after being metered by the automatic metering belt scale. All main and auxiliary materials are fully mixed in the mixer to form a qualified gypsum slurry. The addition of each main and auxiliary material is precisely controlled by the automatic control system and can be automatically adjusted according to the production line speed to meet the needs of large-scale and high-speed production.
3.Molding and Solidification
3.1.The upper paper is unrolled and enters the molding machine through the automatic edge aligner. The lower paper is unrolled and enters the molding machine through the automatic edge aligner, notching machine, and vibration platform. The slurry from the mixer falls onto the lower paper on the vibration platform and enters the molding machine, where the gypsum board of the required specifications is extruded.
3.2.The gypsum board completes the initial setting on the setting belt and the final setting on the conveying roller table, and then is cut into the required length (such as 2400mm, 3000mm or other customized lengths) by the fixed-length cutting machine. After turning by the No. 1 transverse machine, the two gypsum boards leave the No. 1 transverse machine at the same time. After adjusting the spacing using the approaching roller table, they are distributed into the dryer by the distributor.
4.Drying Treatment
4.1.The drying part uses a fuel oil type heat-conducting oil furnace as the heat source. The hot oil exchanges hot air through the fin heat exchanger and is sent into the interior of the dryer by the fan to complete the drying task. The dryer is divided into two zones, which can precisely match the drying curve of the gypsum board, effectively avoiding defects such as overburning and incomplete drying. This process is environmentally friendly, energy-saving, has high thermal efficiency, and the process parameters are easy to control.
5.Subsequent Processing
5.1.The dried gypsum board is sent to the No. 2 transverse system by the plate discharging machine to complete the processes of fixed-length trimming and automatic edge wrapping.
5.2.It is sent to the automatic stacker by the finished product conveyor for stacking. After the stacking is completed, it is transported to the packaging area by a forklift for inspection and packaging, and then the whole set of production processes is completed.