Senieer’s pin mill is a high-speed impact precision grinding mill, which can process various types of materials. The minimum particle size of processed materials can reach 5μm (largely influenced by material characteristics). It has strong versatility, occupies less space, and produces materials with concentrated particle size distribution and good fluidity.
Features of Pin Mill
- Various design of milling device available,to mill different mater
- Modular design of the entire machine to prevent dust leakage
- Very easy to dismantle and clean
- CIP/SIP design available(at your choice)
- Cooling recycling system available(at your choice)
Browse Chapter
- Chapter 1:What is a pin mill and its working principle?
- Chapter 2: What is the use of pin mill?
- Chapter 3: Why is pin mill called pin mill?
- Chapter 4: What are the disadvantages of using a pin mill?
Chapter 1:What is a pin mill and its working principle?
The pin mill consists primarily of a rotating disc, a stationary disc, and a feeding system. The feeding system uniformly delivers the material into the grinding chamber. The material is then subjected to high-speed rotation by the rotating disc, where the needles between the rotating and stationary discs collide to achieve pulverization.
Driven by the twin-screw mechanism, the material enters the crushing chamber at a constant speed. The central feed port houses a rotating needle disc rotor and stationary needle disc stator. The annular needle bars of both discs alternately engage, with the rotor’s high-speed rotation generating centrifugal force. As the material enters through the stator’s center, it is propelled through the needle bar arrays at high velocity under centrifugal force. Intense material-to-material and material-to-needle bar collisions achieve effective crushing. During this process, the material’s linear velocity can reach up to 200 m/s, yielding a minimum particle size of 5 μm (D90).
Chapter 2: What is the use of pin mill?
Pin mill is mainly used to perform fine crushing, deagglomeration, and low-temperature crushing. It is widely used in industries such as pharmaceuticals, nutrition, veterinary medicine, food, and crops.
The structural flexibility of the Pin Mill enables it to switch among multiple functions of fine grinding – depolymerization – low-temperature grinding by adjusting parameters such as rotation speed, gap, and temperature. It can meet the processing requirements of different materials without replacing the equipment:
- For ordinary active pharmaceutical ingredients: Directly achieve the required particle size through fine grinding. If slight agglomeration occurs, the rotation speed can be decreasedto switch to the depolymerization mode to break up the agglomerates.
- For heat- sensitive active pharmaceutical ingredients: Turn on the low – temperature grinding mode to achieve refinement while protecting the activity of the materials. If there is agglomeration after grinding, low – temperature depolymerization can be carried out simultaneously to ensure the powder quality.
Chapter 3:Why is pin mill called pin mill?
The main reason is that its core component is pin, and many small metal rods are densely installed on the disc, which looks like a pin.
Chapter 4:What are the disadvantages of using a pin mill?
- Not suitable for materials with high hardness or toughness, such as high – hardness minerals, metals, and rubber.
- After wear, the maintenance cost is high, and there are numerous pins that need to be checked and replaced regularly.
- Compared with hammer mill, the yield of a pin mill is low.
- The material needs to be pretreated, and the grinding of ultrafine powder cannot be completed. Only ajet mill can be used.
