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In the processing and laboratory analysis of traditional Chinese medicinal materials, the fineness and uniformity of samples directly affect the accuracy of subsequent testing results. Conventional grinding methods often suffer from low efficiency and uneven particle size. The Ultra Centrifugal Mill WUCM-20, with its high-speed impact and shearing mechanism, has become an ideal solution for laboratory sample preparation.

1. Objective

To grind traditional Chinese medicinal materials into fine and uniform powder, followed by sieving through a No. 4 sieve to meet experimental requirements.

2. Equipment

Ultra Centrifugal Mill WUCM-20

24-tooth stainless steel rotor blade and sieve ring

3. Experimental Procedure

Before starting, connect the power supply and ensure the system is properly assembled. The WUCM-20 features a modular design, allowing quick installation of blades and sieve rings.

Parameter Setting
Set the rotation speed to 12,000 rpm and the grinding time to 60 seconds. The instrument supports an adjustable speed range from 0 to 20,000 rpm, enabling flexible adaptation to different sample types.

Sample Feeding and Grinding
After starting the program, feed the medicinal material gradually in small portions. Under high-speed rotation, the sample is rapidly ground through the combined action of impact and shear forces between the blade and the sieve ring.

Sample Collection
After grinding, the powder passes directly through the sieve ring into the collection tray, enabling immediate discharge and minimizing sample retention or contamination.

Post-processing
Collect the powder and proceed with sieving and inspection to confirm that the particle size meets the required standard.

4. Results

The processed samples exhibit a fine and uniform powder consistency, fully meeting the No. 4 sieve requirements, with excellent reproducibility.

5. Key Advantages of WUCM-20

5.1 Advantages of the Operating Principle

Immediate input and output for high efficiency

Especially suitable for soft, elastic, and fibrous samples such as herbal materials

Ensures consistent and required fineness of the final sample

5.2 Versatile Accessory System

The system offers multiple configurations to meet diverse application needs:

Blades of various specifications and materials (6-tooth / 12-tooth / 24-tooth)

Sieve rings with different aperture sizes for precise particle size control

Collection trays made from different materials

The 24-tooth blade is particularly suitable for fine and delicate grinding applications like traditional Chinese medicine.

5.3 Flexible Parameter Control

Adjustable speed range: 0–20,000 rpm (customizable)

Controllable output particle size

Suitable for both small-scale laboratory use and large-batch processing

5.4 User-Friendly Design Features

Overload indicator display for safe operation

Plug-and-play design for blades and sieve rings

Anti-splash funnel to reduce sample loss

Safety lock mechanism for enhanced operational safety

6. Precautions

To ensure optimal performance and safety during operation:

Feed samples in small quantities and multiple batches to avoid overload

Be cautious of the temperature of the collection tray after grinding to prevent burns

Clean the collection tray with a brush after use and reinstall it properly

7. Conclusion

This experiment demonstrates that the Ultra Centrifugal Mill WUCM-20 can efficiently grind traditional Chinese medicinal materials while ensuring uniform particle size and consistent fineness. With its flexible parameter control, versatile accessories, and user-friendly design, it is widely applicable in pharmaceutical research, herbal processing, and laboratory sample preparation.

For laboratories requiring high precision and efficiency in sample grinding, the WUCM-20 is a reliable and advanced choice.