The laboratory dry granulator is a small dry granulator for laboratory research and development. It is suitable for laboratory, intermediate experimental equipment and small-scale production. It can be shaped by only about 80 grams of dry powder. According to the principle of mechanical extrusion granulation process, the dry powdered or fine crystalline material with a certain crystal water is arranged and extruded into a thin sheet, and then through a granulation system, a granule of a desired size is formed through a sieve. The raw materials can be fed into the hopper by hand or vacuum feeder, conveyed and compressed by the vertically placed feeding screw, and pushed to the bite angle of the two squeeze rollers; the raw material is extruded into a sheet by a horizontally placed pressure roller (pressure The speed of the rolls determines the time the material stays in the roll zone; the pressure required for the material is transferred linearly to the press rolls by hydraulic means, and the vertically aligned rolls ensure consistent material density. The machine is easy to assemble and disassemble and clean.
Troubleshooting method 1. Dry granulator roll is easy to break
The material of the dry granulator roll is generally made of stainless steel iron 2Gr13, the surface is treated with gas nitriding technology, the surface hardness HV10 is above 1000°, and the nitriding hardened layer depth is above 0.15mm, so that the roll surface has strong wear resistance. And anti-fatigue strength, and has good corrosion resistance. The surface structure of the dry granulator roll, the main size parameters are the number of circumferential teeth, the width of the tooth surface groove, and the depth of the tooth opening surface. Different roll surface structures have different pressing effects on the suitability of materials. According to different material characteristics, they can be generally divided into three kinds of pressure wheels: western medicine type, traditional Chinese medicine type and special material type.
2, the problem of the misalignment of the dry granulator roll
This is actually a problem that occurs when the manufacturing pressure is not high due to the high pressure.
3. Dry granulator leaks cooling water
The inside of the dry granulator roll is provided with cooling water, and the rotating roll and the static cooling water pipe have a dynamic sealing device, but after a long time of use, under a large pressure, there is a problem of leakage. At present, some manufacturers have improved the roll structure, so that the cooling water directly reaches the surface of the pressure roller, which can effectively reduce the surface temperature of the roll and greatly reduce the possibility of leakage. It should be said that it is an improvement.
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