The editor has listed a few points about purchasingMixing granulatorA few opinions are for your reference only.

1. Choose a sandwich pot.

Due to the easy shaking and instability of single-layer pots during production, while sandwich pots can heat and cool certain special materials, which can better meet production requirements. At the same time, the bottom is not easily deformed during long-term pharmaceutical processes. Step drying products are designed as sandwich pots. The design period is 10 years without deformation.

2. The gap between the mixing blade and the bottom of the pot.

The national standard stipulates that this gap is 2mm. In actual production, especially when making Chinese medicine extracts and high viscosity Chinese medicine extracts, a gap of 2mm is prone to bottoming out, which is very difficult to remove after bottoming out, making it impossible to repair the pot after deformation. Foreign companies have set this gap to within 0.5mm, while our equipment has achieved an accuracy of within 1mm, better solving the problems of material accumulation and uneven mixing in similar products. The design parameters are 10 years without deformation.

3. Transmission system

Many wet granulation machine power systems use V-belts and pulleys for transmission (low cost), resulting in insufficient stirring power and easy slippage during long-term production processes. Choosing synchronous belts and pulleys for transmission can ensure full power during long-term production and manufacturing processes, and better meet production requirements. The step drying equipment adopts imported or domestically produced synchronous belt synchronous wheel (model as listed in the accessory list) transmission, which can provide full power. The design parameters are 8 years without replacement.

4. Variable frequency control system

During the granulation process, the speed requirements for the stirring blades vary at different time periods. Using only a dual speed motor for control cannot meet production requirements. Using a frequency converter for control can meet various production processes and achieve good granulation effects. The mixing blade for step drying is controlled by Schneider's frequency converter from France, which can better ensure the production of different types of traditional Chinese medicine and Western medicine. The design capability is 8 years without replacement.

5. Sealing and cleaning system

If black spots or spots are generated during the granulation process, the entire pot of materials should be scrapped. The stirring blade shaft of the step drying equipment adopts air seal and water cleaning. The cutting blade spindle adopts a double-layer protection of air seal and metal hard seal (i.e. mechanical seal) to ensure the sealing effect, and water cleaning is used for cleaning. If a regular rubber sealing system is used, serious leakage problems will inevitably occur, resulting in material scrap. The sealing and cleaning system is also the key to this equipment. Please pay attention to this point among the reviewing experts. The design capacity for step drying is 8 years without replacement.

6. Details of the "R" corner at the bottom of the pot

The coordination between the stirring blade and the R-angle inside the bottom of the pot is also crucial. If the R angle is too small, the material cannot roll normally from bottom to top to form a suitable R angle, which is crucial for the uniform mixing of the material. The R angle has very high manufacturing process requirements during the manufacturing process. The bottom R-angle of the step drying is manufactured using stretching technology, which is different from the welding technology of other manufacturers. The R-angle connection made by welding is long in contact with materials, water, and other corrosive materials, making it easy to penetrate and leak.