II. In-depth Analysis of the Production Process
1.Selection and Pretreatment of Raw Materials
Gypsum Raw Materials: Strictly select high-quality gypsum ore sources to ensure the purity and quality of the raw materials. Through advanced crushing and grinding equipment, the gypsum ore is processed into gypsum powder with uniform particle size and meeting the production requirements.
Auxiliary Materials: Conduct fine inspection and pretreatment of auxiliary materials such as modified starch, retarder, and foaming agent to ensure their stable performance and reliable quality. Store and transport them according to the precise formula to provide accurate raw material support for the subsequent ingredient process.
2.Precise Ingredient and Efficient Mixing
Adopt high-precision metering equipment to quantitatively measure each component of the raw material slurry (modified starch, retarder, pulp, water reducer, water), put them into the hydraulic pulper and stir them into a uniform and stable raw material slurry, and then pump it into the slurry storage tank.
Mix the foaming agent and water in a specific ratio in the foaming agent preparation tank, pump them into the foaming agent storage tank with a heating device, and maintain the temperature above 35°C to ensure the foaming effect.
The accelerator and gypsum powder are fed into the silo through the lifting and conveying equipment. During the ingredient process, the slurry, foaming agent, accelerator and gypsum powder are accurately fed into the mixer through the automatic metering device and fully mixed to form a gypsum slurry that meets the process requirements. The whole ingredient process is adjusted in real time by the intelligent control system according to the production line speed to ensure the consistency of product quality.
3.Precise Molding and Stable Solidification
The upper paper and the lower paper are respectively unrolled by the uncoiler, and then accurately enter the molding machine through equipment such as the automatic edge aligner and notching machine. The gypsum slurry output from the mixer is evenly dropped onto the lower paper on the vibration platform and enters the molding machine to be extruded and molded into a gypsum board blank of a specific specification.
The gypsum board blank completes the initial setting on the setting belt, initially solidifying its shape; and completes the final setting on the conveying roller table to reach a certain strength. Then it is cut into the set length (such as 2400mm, 3000mm or the length customized by the customer) by the fixed-length cutting machine, and then turns through the No. 1 transverse machine, adjusts the spacing through the approaching roller table, and is sent into the dryer by the distributor.
4.Efficient Drying and Energy-saving Design
The drying system adopts an advanced fuel oil type heat-conducting oil furnace as the heat source. The hot oil is converted into hot air through the fin heat exchanger and is sent into the interior of the dryer by the high-efficiency fan. The dryer is designed with two zones. According to the drying characteristics of the gypsum board, it precisely controls parameters such as temperature and wind speed to achieve efficient drying and avoid phenomena such as overburning or insufficient drying. This drying process is environmentally friendly, energy-saving, has high thermal efficiency, and effectively reduces production costs.
5.Fine Post-processing and Quality Assurance
The dried gypsum board is sent to the No. 2 transverse system by the plate discharging machine for fixed-length trimming to cut off the redundant edge parts and ensure the dimensional accuracy of the board; use automatic edge wrapping equipment to wrap the edges of the gypsum board to enhance the edge strength and aesthetic appearance of the board.
The gypsum board is sent to the automatic stacker by the finished product conveyor and stacked according to the set method. After the stacking is completed, it is transported to the packaging area by a forklift for strict quality inspection and packaging to ensure that the products leaving the factory meet high-standard requirements.