Case Study: Fine Powder Sieving Machine for Matcha Powder | Ultrasonic Sieve

Case Overview

A Japanese high-end food and tea powder processing company specializes in producing premium matcha powder. During production, the company faced issues with unstable sieving performance and low output, which seriously affected product quality and production efficiency. After contacting us through our independent website, Sanyuantang Machinery, we provided a targeted solution based on a fine powder sieving machine system.

Problems Faced by the Customer

Due to the natural properties of matcha powder, the following issues occurred during screening:

• Severe mesh clogging: Matcha contains natural oils and moisture, making it easy for fine particles to adhere to the screen surface, causing mesh blockage and reducing screening efficiency.
• Low passing efficiency: Conventional screening equipment cannot effectively overcome particle adhesion, resulting in poor throughput and unstable particle size consistency.
• Strict hygiene requirements: As a food-grade material, the customer requires equipment compliance with GMP and FDA standards, including SS316L stainless steel construction, mirror-polished surfaces with no dead corners, and food-grade silicone sealing rings.
• Material loss risk: During sieving, powder agglomeration and scattering may occur, leading to yield loss and potential cross-contamination.

This type of application typically requires a food powder sieving machine with anti-blocking performance and high sanitary standards.

Problem Diagnosis Process

We conducted a full technical evaluation through multiple communication methods:

• The customer sent matcha powder samples to our laboratory for testing using the ultrasonic vibrating sieve model SYC-800-1S.
• We conducted live video demonstrations of the sieving process to show material flow behavior and mesh permeability.
• Detailed email communication was used to understand production conditions, existing equipment parameters, and technical requirements.
• For hygiene validation, we provided material certification documents and confirmed the internal dead-zone-free structure through video inspection.

Solution Provided

Based on the customer’s requirements of 60 mesh / 150 mesh screening, 80 kg/h capacity, single-layer operation, and an additional spare screen frame, we customized the SYC-800-1S ultrasonic vibrating sieve system.

The core of this solution is to convert high-frequency electrical energy into vertical mechanical vibration waves, transmitted directly through the stainless steel mesh frame. Under ultrasonic acceleration, ultra-fine green tea powder remains in a suspended state on the screen surface. This effectively breaks electrostatic adsorption and agglomeration, eliminating clogging factors such as adhesion, friction, and particle wedging.

This makes it a highly efficient matcha powder sieving solution for fine and sticky powder materials.

Customized Configuration & Technical Parameters

• Equipment Model: SYC-800-1S ultrasonic vibrating sieve (single layer, dual outlet design)
• Material Specification: All product-contact parts and machine body are made of high-grade SS316L stainless steel with excellent corrosion resistance
• Surface Treatment: Full mirror polishing (Ra ≤ 0.4μm), ensuring no residue or dead corners
• Sealing System: FDA-certified food-grade transparent silicone sealing rings and high-elastic V-type sealing strips to prevent dust leakage and contamination
• Screen Frame Design: Single-layer reinforced ultrasonic screen frame, plus an additional spare screen frame delivered for quick replacement, minimizing downtime during cleaning or mesh change

Product reference:
SYC-800-1S Ultrasonic Vibrating Sieve
https://sanyuantangcn.com/products/ultrasonic-vibrating-screen

Equipment Parameters

Before vs After Comparison

Before (Conventional Screening Machine)

Green tea powder began to severely clog the mesh within 10 minutes of operation. Operators had to frequently stop the machine for manual cleaning. Due to powder adhesion, screening efficiency was extremely low, with actual output only reaching 30–45 kg/h. In addition, occasional oversized particles entered the final product.

After (SYC-800-1S Ultrasonic Vibrating Sieve)

After activating the ultrasonic system, the green tea powder remained in a fluidized suspended state on the screen surface. The mesh stayed fully open without blockage. The system achieved continuous 24-hour stable operation, with actual output reaching 100–120 kg/h, significantly exceeding the customer’s target of 80 kg/h. The final product achieved a 99.8% qualification rate.

Achievements

• Production efficiency increased by more than 150% for the fine green tea powder sieving process
• Significant reduction in manual cleaning and maintenance downtime
• Passed strict food hygiene inspection required by Japanese regulatory standards
• Established long-term trust, and the customer has selected Sanyuantang Machinery as a preferred supplier for future expansion projects

This case demonstrates the effectiveness of a food powder sieving machine designed for high-hygiene, high-precision applications.

Engineering Recommendations for Fine Powder Sieving Machine Applications

1. Control feeding speed and uniformity strictly
   Fine tea powder has low density. Continuous and stable feeding using a vacuum feeder or electromagnetic feeder is recommended to avoid local overload on the screen surface.
2. Use dual-screen frames for cleaning and rotation management
   The spare screen frame should be cleaned using compressed air or ultrasonic cleaning equipment and must be fully dried before reuse to prevent moisture-induced clumping.
3. Regular inspection of the ultrasonic transducer and cable sealing
   High-pressure water washing of ultrasonic components must be strictly avoided to prevent frequency drift or damage.
4. Monitor ultrasonic generator load and heat condition
   The controller should be placed in a well-ventilated cabinet. An abnormal current increase may indicate mesh tension issues or frame resonance problems.
5. Use a high-tension screen mesh bonding process
   For 150 mesh and finer applications, high-tension stainless steel mesh with food-grade epoxy bonding is recommended to ensure uniform ultrasonic energy distribution.

Conclusion

In this project, the ultrasonic vibrating sieve technology successfully solved the key challenges of matcha powder—high oil content, strong adhesion, and fine particle screening difficulty.

The result achieved stable high-capacity production, high-precision separation, and strict food-grade hygiene compliance, providing a reliable continuous production solution for the customer’s production line.

This project is a typical application of a fine powder sieving machine in high-end food powder processing.

Extended Industry Applications of Ultrasonic Vibrating Sieve

Contact Us

For testing, customization, or technical consultation, please contact:

Sanyuantang Machinery
Professional provider of fine powder sieving machine solutions
Custom design / process optimization / lab testing / global delivery

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