1️⃣ Challenges in Powder Conveying Lines
In powder conveying systems, problems such as poor flow or unstable feeding frequently occur.
This is because the behavior of powders varies greatly depending on their type and characteristics.
Especially for materials with high hygroscopicity, cohesiveness, or fine particle size,
the installation position and connection method of the screw feeder have a major impact on performance.
2️⃣ Basic Principles for Screw Feeder Placement
There are three basic principles when installing a screw feeder in a powder conveying line.
① Utilize Gravity
Install the feeder directly under a hopper or in a position where powder can fall naturally.
This prevents bridging and ratholing, ensuring smooth discharge and stable feeding.
② Eliminate Steps at Connection Points
When connecting the screw feeder outlet to a conveying line,
any gaps or steps can cause powder buildup and clogging.
Keeping the transition as flat and seamless as possible ensures a consistent flow.
③ Secure Maintenance Space
Regular cleaning is essential in powder-handling equipment.
If the feeder is installed too close to walls or other machines, disassembly and cleaning become difficult.
Providing enough space for maintenance is a key part of proper installation.
3️⃣ Seiwa Giken’s Design Approach
At Seiwa Giken, screw feeders are designed not as standalone devices but as integrated components of the entire conveying system.
① Agitator Hopper Design
A gently rotating agitator inside the hopper prevents bridging and uneven discharge,
maintaining a stable feeding flow.
② Polished Contact Surfaces
All powder-contact parts are mirror-polished,
minimizing powder adhesion and preventing buildup during conveying.
③ Selecting Between Standard and Mini Screw Feeders
- Standard Screw Feeder (20L Hopper Type):
Ideal for production lines and large-volume feeding.
Delivers excellent stability, especially when combined with an air vibrator. - Mini Screw Feeder:
Best suited for small-quantity or experimental setups.
Compact design allows flexible installation in limited spaces.
4️⃣ Examples of Installation Optimization
Proper placement can significantly improve overall system performance.
For example:
- Upstream of a mixer – ensures consistent and accurate powder dosing.
- Under a dust collector or filter – prevents clogging and accumulation.
- In liquid mixing processes – enables precise powder addition control.
For long-distance conveying systems, adding intermediate feeders can help maintain powder flowability and prevent blockages.
5️⃣ Conclusion
A screw feeder is more than just a feeding device —
it is a critical element that determines the flow and stability of the entire powder conveying line.
By optimizing installation layout, manufacturers can achieve both stable operation and consistent product quality.
Seiwa Giken provides layout proposals and feeding tests
to determine the best feeder configuration for each type of powder.
👉 Learn more about Seiwa Giken’s Screw Feeders↓↓
