Our company has devoted to manufacture sugar coating machine for many years, supply good quality sugar coating machine. The nuts coating machine can be widely used to coat many nuts such as peanut, almond, walnut etc. Here will introduce more about the nuts sugar coating machine.
1, coating equipment
There are three main types of equipment to choose from, namely traditional coating pan, efficient coating machine, fluidized bed. Traditional coating pan also known as sugar-coated pan. Efficient coating machine sub-perforated coated pan and non-perforated coating pan two. Holes coated efficient pan stainless steel closed structure, the wall of the pot has vents, hot air through the material bed after the discharge from the exhaust wall of the pot. No hole coating pan pot wall without vents, hot air outlet in the material bed, through the material bed after the exhaust vent from the rear of the pot. Both of these ways increase the drying efficiency. The dry gas stream can pass through the tablet bed from top to bottom or from bottom to top. Such equipment is currently the main equipment for film coating production. Fluidized beds are commonly used for water-soluble or organic solvent coatings of small particles, granules or pellets. However, due to its strong mechanical force. Drug tablets easy to wear, it is not commonly used.
2, coating operation
First preheat the coating pan, and then set the core in the pot, start the exhaust and dust removal device. At the same time with the hot air preheater core, so that the core heating evenly, and suction off the adsorption of fine powder on the tablets. Open the compression pump, adjust the air volume and flow, the prepared coating material solution evenly sprayed on the surface of the core while using hot air drying, the core surface quickly form a smooth, smooth surface film.
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5, film coating process often encountered problems and solutions
1, too wet and wet is due to the jet speed relative to the drying efficiency is too fast, spray and drying did not reach a balance between. This phenomenon is more likely to occur in water-soluble coatings because water is more difficult to dry than organic solvents, sticking to the walls of the pot due to over-wetting, or sticking to each other. This will result in membrane damage, uneven. To avoid over-wet phenomenon, you must control the speed of liquid spray. And increase the inlet air temperature. In addition, adding talc or magnesium stearate to the coating solution can improve this.
2, the surface roughness is not smooth After drying the film appears dark and rough surface coating, powder off phenomenon, if the core surface lettering marks, easy to accumulate dry scored coating powder. Causes, in most cases due to improper spray drying. Droplets can not spread due to drying too fast. In addition, the dried polymer particles adhere to the surface of the core. Easy to create clothing film rough. This condition can be improved by increasing the speed of the spray, lowering the temperature of the intake air or shortening the distance between the spray gun and the material bed.
3, orange peel phenomenon refers to the bright and rough phenomenon of the core surface, due to lack of atomization pressure, the coating solution can not be uniformly dispersed into the mist particles, and too coarse liquid particles spilled on the core. The solution is to increase the atomization pressure, or to adjust the solids content of the coating solution and reduce the viscosity of the coating solution. Good control of the main process parameters.
Contact information:
Skype: serenayan666
Email: serena@machinehall.com
Whatsapp/Mobile: +8618595717505
Nuts Machine 