How is Rubri MgO board made
- Time of issue:2020-01-20 13:55
How is Rubri MgO board made
- Time of issue:2020-01-20 13:55
Rubri MgO board is a new type of non-combustible decorative material made of magnesium oxide, magnesium sulfate, water, non-organic minerals, bonders and fibre mesh composites. The product has the characteristics of heat insulation, fire resistance, corrosion resistance, high strength, good sound insulation, waterproof, shockproof, odorless, non-toxic, non-freezing, energy saving and environmental protection.
It has a light weight and convenient construction and long service life, and is mainly used for interior decoration, mobile board rooms and lining boards for indoor non-load-bearing internal partition walls.
The raw materials for the production of magnesium oxide board are some inorganic, environmental protection and energy saving materials. For raw materials, wood/straw chips and perlite are used as auxiliary fillers to mix and stir, and bonders and fiber mesh are used as reinforcement and toughening materials.
Other additives can be added; produced by rolling and extrusion equipment in a slurry line, under the conditions of natural temperature (10-35℃ is the best), an exothermic reaction occurs and a substance is solidified.
Note: ① ingredients are the key process
② Primary curing and secondary curing are special processes
Standards production process and operations:
1. Ingredient :
Put the measured raw materials into the mixer first, fully dissolve it with water, adjust it to use Baume, and leave it for about 24 hours (usually use between 20 ~~ 26 Baume, according to climate, temperature, plate changes, process requirements) Etc. appropriate adjustments).
Before the machine is turned on, first check that the power supply and equipment are normal (make sure that the power supply is normal, and idle the board making machine first), and adjust the gap between the rollers according to the thickness of the technical requirements to meet the requirements.
3. Board Making
Adjust the cutting saw according to the production size and prepare the mold. The mold must be intact, clean, and free of sticky materials. Mix the release agent according to the proportion and stir evenly. Place the glass fiber cloth evenly on both sides.
After preparation, according to the requirements, select the formula in the automatic control program, start the program, measure the ingredients, and accurately transfer it to the blender for stirring by the automatic transmission system.
After the material is finished, open the discharge door to discharge the material and start the plate making machine. Run slowly and measure the thickness with a caliper. After everything is normal, increase the speed and drive at a uniform speed to transport the plate to the forming frame. The board should be flat, free of raw materials, air bubbles, cloth folds, curtains, etc .; the release agent should be applied evenly.
4. Primary curing
The forming frame filled with sheet material is sent to the primary curing workshop (conservation room) for conserving and curing.The quality of the single-time curing of the board will directly affect the product quality, which is especially important. The temperature of the primary curing workshop (conservation room) is generally controlled between 10-35 ° C, and the relative humidity is preferably between 50 ﹪ and 75 ，, which can make the board fully exothermic. It is necessary to always monitor the room temperature and humidity. Too high, exceeding the requirements to take heating or cooling measures.
In general, the temperature of primary curing workshop (conservation room) is 10-25 ℃, relative humidity is 30 ﹪ -50 ﹪, demolding time is 24h; temperature is 25-35 ℃, relative humidity is 50 ﹪-60 ﹪, demolding time is 12h (according to actual condition).
Check that the demolding equipment is normal, check that the plate is solidified, and can demould; send the cured panel forming frame to the demolding elevator, and turn on the equipment to demould.
Pay attention to the product from damage and the protection of trays and molds when demoulding. Each board must be stamped with the team seal and date stamp.
Check the product quality one by one when demolding, whether there are pores, molds, stickies, shelf pressure, stains, cracks, and length, etc. If unqualified, clearly identify and put them separately and analyze the reasons; report any problems if found If necessary, it can be analyzed and resolved jointly by quality inspection, production and technology, and measures are taken to ensure the smooth production of the following.
6 . Secondary curing
Placing the stripped plates neatly, clearly marked, and transported to the secondary curing workshop for secondary curing and curing.
Secondary curing is an important stage of secondary heating of magnesium oxychloride cement. The cycle is about 7 days (must be more than 6 days).
Secondary curing products should be neatly stacked, and the temperature of the plate should be controlled below 80 ° C. Exceeding this temperature will affect the quality of the product, causing non-aging resistance, premature crushing, etc .; therefore, if the temperature exceeds 80 ° C, the plate should be separated and separated Floor or blower cooling.
After the board has cured for 7 days, the temperature will drop to room temperature, so you can mount it for immersion. Handle it with care during loading, and pay attention to protect the board.
Soaking should be soaked first in batches and soaked in each pool. After 4 shelves are filled in each pool, the next pool can be soaked.
Check the magnesium content of the water after each soak, it must not exceed 3 degrees, otherwise the water must be changed.
Soaking is generally about 12 ~ 16 hours (depending on the thickness of the plate and the formula), soaking will directly affect the whiteness of the plate and whether it will return to halogen.
Make sure to soak first and dry first in batches. Handle with care, and protect the board to avoid damaging the board.
When drying, you must dry before you can collect the board. If necessary, measure the moisture or test saw. The surface of the board has no watermark, the cutting surface is white, and the dust does not stick.
Dry the boards that need to be dried into the drying room, turn on the warm air, and gradually increase the temperature from low to high. If the temperature is rising too fast, the boards will be degraded and cracked due to rapid cooling and heat. Adjust and control the temperature according to the requirements of the process, not higher than 50 ° C (adjusted according to the thickness of the sheet). Excessively high temperatures will also cause the sheet to deform and crack.
Check that the cutting saw is intact, and turn on the cutting saw to cut.
Put the collected plate neatly on the cutting saw for cutting. Do not overload when cutting, and the cutting height should not exceed 5cm;
The forward speed is about 25hz; the reverse speed is about 50hz.
Operators must operate according to process requirements, and are not allowed to randomly adjust various data.
The cutting size shall be cut according to the size assigned by the production task; the length and width deviation is generally ± 1mm. The diagonal deviation is generally ± 3mm (according to standards or customer requirements).
Clean the dust on the surface of the cut sheet and arrange it neatly according to the grade classification code; and identify the product specifications, quantity, grade, cutting personnel, date, etc. for easy inspection. After the inspection is qualified, the inspector will mark the package before packaging.
The operators of each process conduct self-inspection first, and the director or team leader conducts the first inspection. The quality inspector is responsible for the inspection, according to the inspection standards and regulations.
Sampling supervision; each process operator, as the quality inspector of the previous process, is responsible for product quality.
According to the packing regulations, it should be neatly arranged, vertical up and down, without burrs, the steel belts should be tight, the trademark certificate should be pasted flat and standardized.
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