Screw Conveyor

A screw conveyor (also called an auger conveyor) is a mechanical device used to move bulk materials like powders, grains, granules, or semi-solids from one place to another using a rotating helical screw inside a tube or trough.

Working Principle :

Material is fed into the inlet hopper

The screw rotates inside the casing

As it rotates, it pushes material forward

Material moves continuously to the outlet

👉 Works similar to a rotating

screw pushing material along its length

Types of Screw Conveyor :

1. Horizontal Screw Conveyor

Most common

Used for short-distance transport

2. Inclined Screw Conveyor

Moves material at an angle

Efficiency reduces with steep angles

3. Vertical Screw Conveyor

Lifts material vertically

Requires higher power

4. Shaftless Screw Conveyor

No central shaft

Ideal for sticky or fibrous materials

5. Flexible Screw Conveyor

Uses flexible tubing

Good for small industries

Applications

Screw conveyors are widely used in:

🍛 Food industry → flour, sugar, spices

🌾 Agriculture → grains, seeds

🧪 Chemical industry → powders, pellets

🧱 Construction → cement, sand

💊 Pharma → powder transfer

👉 Commonly used with

machines like Ribbon Blender

for material feeding

Key Features

Continuous material handling

Compact design

Dust-free operation (closed system)

Can handle different materials

Low maintenance

👍 Advantages

Easy to install and operate

Controlled material flow

Works in horizontal, inclined, vertical positions

Good for bulk handling