The production methods and processes of mineral wool sound-absorbing panels have been continuously developed and improved. There are mainly two methods of semi-dry production and wet production. Most of them use the wet fourdrinier wire copying process. Semi-dry production has a long history, the products have natural patterns, and the sound absorption coefficient is above 0.5, but the variety is relatively simple, the production method is relatively primitive, the degree of automation is low, and the slurry concentration is about 50%, which is intermittent production. The raw material starch needs to be gelatinized in advance before batching and stirring, which has high cost and low production efficiency. This production method is gradually being replaced by the wet production line. The production method and forming equipment of wet-laid rotary screen copying are mainly transformed by the production technology of asbestos products. The product quality is stable, but it is not a continuous molding production, and the production efficiency is lower than that of the fourdrinier wire copying production method. Therefore, manufacturers in various countries have also Eliminate this molding method. Wet-laid fourdrinier wire copying production process is the main molding method for producing mineral wool sound-absorbing panels at present. This production process is mainly transformed from paper production technology. The slurry concentration of this production process is about 5%, the copying speed is fast, the production efficiency is high, the production thickness is not limited by the equipment, the product thickness can be adjusted arbitrarily between 7-20mm, and various raw materials can be changed and adjusted. Various formulas can produce mineral wool sound-absorbing panels with certain special requirements. It should be said that the production process of wet-laid fourdrinier wire is the current popular and advanced production process of mineral wool sound-absorbing panels. It has the advantages of high automation and production efficiency, strong product formula transformation ability, low production cost and high product strength. The entire production process is completed through a series of processes such as pulping, fourdrinier wire copying, dehydration, slitting, drying, slitting, spraying, and finishing.
Mineral wool sound-absorbing panels are produced by wet process. First, various raw materials are mixed and processed into substrate panels, and decorative processing is also required. The processing of the base material is to process the mineral wool into a basic board, add water and stir the mineral wool raw material to separate the cotton and the slag ball, etc., the slag ball and other sundries sink to the bottom, remove the mineral wool, and then mix the adhesive and water repellent. Additives such as flocculant, flocculant, etc. are mixed with granular cotton according to the proportion and stirred to form a slurry, which is formed on a fourdrinier wire machine. substrate. Decorative processing is to process the decorative properties of mineral wool sound-absorbing panels, and can be divided into blind hole processing, grooved panel processing, printing panel processing, and embossed panel processing. Blind hole processing is to use mineral wool substrates to roll out impervious holes of different sizes, shapes and depths to increase sound absorption and decorative effects. Some require special milling equipment to machine the grooves in the vertical and horizontal directions, or mill out a circle, then color and dry, which is the processing of the grooved plate. Some semi-finished mineral wool boards are coated with pre-prepared paint through the template on the printing machine, so that various patterns can be printed, and then fine sand is sprinkled on the patterns and dried, which greatly increases the efficiency of the production process. Decorative properties of sound-absorbing panels. After some semi-finished products are colored, various embossed patterns are pressed out by a press equipped with embossed templates, and then they are made by cutting and tenoning. Embossed sound-absorbing panels have high processing costs and high technical requirements, and are relatively high-end products.
