What Is a Screw Feeder With Hopper?
A screw feeder with hopper, also known as a hopper screw feeder or auger feeder with hopper, is a mechanical conveying system designed for controlled feeding of powders, granules, and other bulk materials. It consists of a storage hopper, rotating screw, tubular or U-shaped housing, and motor-driven transmission system. As the screw rotates, material is continuously discharged from the hopper and conveyed to downstream equipment at a controlled rate.
Depending on material properties and operating requirements, screw diameters, motor speeds, and hopper capacities can be customized. Typical conveying angles range from 0° to 45°, with steeper inclinations requiring specific screw and drive configurations. Sanyuantang supplies carbon steel and stainless steel powder screw feeders for integration with mixers, vibrating screens, packaging machines, and other bulk material processing systems.
How Does a Screw Feeder With Hopper Work?
A hopper screw feeder uses a motor-driven auger to move powders or granules from the feed hopper through a conveying tube. The rotating screw advances the material toward the discharge outlet, providing a continuous supply to connected processing equipment.
Working Steps
- Material Loading: Powders or granules enter the feed hopper through manual loading, bag dumping, or an upstream conveying system.
- Screw Feeding & Conveying: The motor drives the screw flight, moving material through the enclosed conveying tube. Screw diameter, pitch, and rotational speed affect the feeding capacity.
- Controlled Material Discharge: Material is transferred to a mixer, vibrating screen, filling machine, or storage unit. An optional variable-speed drive allows the feeding rate to be adjusted according to production requirements.
Testing Video
Structure & Components
A screw feeder with hopper consists of a feeding hopper, rotating screw assembly, conveying tube, motor drive, discharge outlet, and supporting structure. The components are selected according to material flowability, required feeding capacity, installation height, and maintenance requirements.
| Component | Function & Features |
|---|---|
| Feed Hopper | Receives and temporarily stores materials before conveying. |
| Screw Shaft & Flight | Rotates to move powders or granules through the conveyor. |
| Conveying Tube | Encloses and guides materials toward the discharge outlet. |
| Drive Motor & Gearbox | Supplies rotational power to the screw assembly. |
| Discharge Outlet | Transfers materials to downstream processing equipment. |
| Support Frame | Supports the feeder at the specified conveying height and inclination. |
| Frequency Inverter | Optional control for adjusting screw speed and feeding rate. |
| Hopper Vibrator | Assists material discharge for suitable powders prone to bridging. |
| Hopper Safety Screen | Helps prevent oversized foreign objects from entering the screw feeder. |
Parts Details
Features of Screw Feeder With Hopper
Screw feeders with hoppers combine material loading, controlled feeding, and enclosed conveying in one compact system. Hopper design, screw configuration, and motor controls can be selected for different materials and production conditions.
Continuous Material Feeding
Supplies powders and granules to downstream processing equipment without repeated manual material transfer.
Enclosed Screw Conveying
Keeps materials inside the conveying tube, helping reduce dust escape, product spillage, and exposure to the surrounding environment.
Adjustable Feeding Rate
Optional variable-frequency control allows screw rotation speed to be adjusted to match downstream equipment requirements.
Flexible Hopper Design
Round, square, and customized hopper openings accommodate different material loading methods and feeding conditions.
Inclined Material Transfer
Moves bulk materials from lower loading points to elevated mixers, screening machines, and packaging equipment.
Production Line Compatibility
Customized discharge outlets, support frames, and electrical connections allow integration with existing processing equipment.
Screw Flight & Material Contact Surfaces
The screw flight can be configured with different diameters and pitches to suit material characteristics and feeding requirements. Stainless steel contact surfaces are available for applications requiring corrosion resistance or specific material compatibility.
Screw clearance, bearing arrangement, and cleaning access should also be considered when handling abrasive powders or materials requiring frequent product changes.
Specifications
Sanyuantang supplies screw feeding equipment in different diameters and conveying configurations. The LS Series specifications below provide reference values for screw diameter, pitch, rotational speed, and nominal conveying capacity. Final hopper size, installation angle, motor power, and actual feeding rate are confirmed according to the selected model and material conditions.
| Model | Screw Diameter (mm) | Screw Pitch (mm) | Screw Speed (rpm) | Reference Capacity (m³/h) |
|---|---|---|---|---|
| LS-100 | 100 | 100 | 140 | 2.2 |
| LS-125 | 125 | 125 | 125 | 4 |
| LS-160 | 160 | 160 | 112 | 8 |
| LS-200 | 200 | 200 | 100 | 11 |
| LS-250 | 250 | 250 | 90 | 22 |
| LS-315 | 315 | 315 | 80 | 34 |
| LS-400 | 400 | 355 | 71 | 64 |
Note: These are reference specifications for the LS Series screw conveyor range, not guaranteed capacities for every hopper feeder configuration.
Capacity & Feeding Rate Considerations
Actual feeding capacity depends on screw diameter, pitch, rotational speed, material bulk density, hopper discharge conditions, and conveying inclination. For accurate equipment selection, the required feed rate and material properties should be reviewed together.
Hopper Design & Feeding Configurations
Hopper design affects how bulk materials enter the screw feeder and how consistently they are supplied to the conveying tube. Different hopper openings, discharge shapes, and flow-assistance devices can be selected for manual loading, continuous feeding, or connections to upstream storage equipment.
Round & Square Feed Hoppers
Round hoppers provide a compact loading arrangement for suitable powders and granules. Square or rectangular hoppers offer wider openings for bag dumping and bulk material loading. Hopper dimensions and outlet geometry are selected according to the material and required feed rate.
Hopper Capacity & Material Flow
Hopper capacity should match material bulk density, consumption rate, and refilling frequency. For powders prone to bridging or compaction, hopper geometry and discharge arrangements require additional consideration.
Hopper Vibrators & Flow Assistance
Optional hopper vibrators can help suitable powders discharge more consistently into the screw inlet. For materials with poor flowability, alternative hopper designs or flow-assistance devices may be required.
Variable-Speed Screw Feeding
A frequency inverter adjusts screw rotation speed to regulate material delivery. This configuration is commonly used when a powder screw feeder supplies mixers, vibrating sifters, or packaging equipment with changing feed requirements.
Custom Screw Feeder With Hopper Types
Sanyuantang manufactures custom screw feeders with hoppers to meet different material properties, feeding capacities, installation layouts, and production requirements. We offer flexible configurations for screw design, hopper structure, conveying angle, construction materials, and discharge connections to suit standalone feeding or integrated processing lines.
Inclined Screw Feeder
Conveys powders and granules at an upward angle, typically 15°–45°, where installation height is limited.
Horizontal Screw Feeder
Provides continuous, controlled material feeding between hoppers, mixers, and processing equipment.
Vertical Screw Feeder
Lifts suitable free-flowing materials vertically in compact production layouts using a dedicated screw configuration.
Stainless Steel Screw Feeder
Available in SS304 or SS316L for food, pharmaceutical, and chemical processing applications.
Integrated Screw Feeder with Inline Vibrating Screen
Combines a hopper screw feeder and inline vibrating screen for continuous material feeding, impurity removal, and powder screening in a compact processing system.
Twin Screw Feeder
Uses two parallel screws to improve feeding consistency for cohesive, poorly flowing, or difficult-to-handle materials.
Contact Us
Need a Custom Feeding Solution?
Send us your material type, required feeding capacity (kg/h), conveying distance, installation angle, and available space. Our engineers will recommend a suitable screw feeder and hopper configuration for your production line.
Inclined Screw Feeding & Conveying Angles
Sanyuantang screw feeders with hoppers support horizontal and inclined material conveying, common installation angles ranging from 0° to 45°, depending on material properties and equipment configuration. Inclined screw feeders are commonly used to transfer powders and granules from floor-level hoppers to mixers, vibrating screens, and packaging machines.
As the conveying angle increases, material backflow may reduce feeding capacity and require adjustments to screw pitch, rotational speed, and motor power. Our engineers can customize the conveying angle, screw diameter, feeding height, and discharge position to match your production layout and required throughput.
Conveying Angle & Equipment Selection
| Configuration | Design Considerations |
|---|---|
| Horizontal Feeding | Transfers materials between equipment at similar elevations. |
| Low-Angle Inclined Feeding | Provides material elevation with relatively moderate changes in conveying conditions. |
| Steeper Inclined Feeding | Requires evaluation of material fallback, screw speed, loading, and motor power. |
| High-Lift Feeding | May require a specialized steep-incline or vertical screw conveying design. |
Conveying Height & Installation Space
The required lifting height, inclination angle, and discharge position determine the conveyor length and support structure. Where floor space is limited, alternative equipment arrangements and outlet positions can be considered.
Materials and Industrial Applications
A powder screw feeder is commonly used for continuous transfer of dry powders and fine granules to mixers, vibrating screens, filling machines, and other processing equipment. Hopper shape, screw dimensions, construction materials, and feeding speed are selected according to material properties, required throughput, and production conditions.
Food Processing
Suitable Materials: Flour, sugar, salt, seasoning powders, grain meals.
Feeds dry ingredients to mixers, vibro sifters, filling machines, and packaging equipment. Stainless steel contact parts and suitable cleaning access can be specified for food processing applications.
Chemical Processing
Suitable Materials: Resin powder, pigments, chemical additives, fertilizer granules.
Provides enclosed material transfer between storage hoppers, mixing equipment, and processing machines. Contact materials, seals, and electrical specifications are selected according to chemical compatibility and operating conditions.
Plastics & Recycling
Suitable Materials: Plastic pellets, masterbatch, recycled plastic granules.
Transfers granular plastic materials to processing machines, screening equipment, storage bins, or packaging systems. Hopper dimensions and screw configurations are selected according to particle size and required feed rate.
Feed & Agriculture
Suitable Materials: Grain meals, feed powders, premix ingredients, suitable feed granules.
Supplies bulk materials to feed mixers, blending equipment, and downstream processing systems. Adjustable feeding speed can be specified where the production process requires changes in material supply.
Minerals & Building Materials
Suitable Materials: Cement, gypsum powder, limestone powder, mineral fillers.
Supports enclosed transfer of dry mineral powders to mixing, weighing, or collection equipment. Abrasion resistance, dust containment, and screw wear should be considered during equipment selection.
Pharmaceutical & Fine Chemical Processing
Suitable Materials: Compatible dry excipients, granules, and fine chemical powders.
Suitable auger feeding systems can transfer materials between processing stages. Sanitary construction, cleaning, containment, and documentation requirements must be evaluated for regulated applications.
Screw Feeder Integration with Production Lines
Screw feeders with hoppers can be integrated with mixing, screening, weighing, and packaging equipment for continuous material processing. Sanyuantang supplies compatible screening and conveying machines, allowing feeding arrangements to be configured for new or existing production lines.
Our engineers review material feed rate, conveying height, discharge position, electrical controls, and connection dimensions to match the feeder with downstream equipment.
Powder Screening & Packaging Line
A screw feeder supplies material to a vibrating screen for impurity removal or particle classification. Screened material is then transferred to packaging or collection equipment.
System Equipment: Hopper Screw Feeder → Vibro Sifter → Packaging Machine
Powder Mixing & Feeding System
A hopper screw feeder transfers dry ingredients from the loading hopper to a powder mixer. Variable-speed feeding can be specified according to the mixing process and material consumption requirements.
System Equipment: Feed Hopper → Screw Feeder → Powder Mixer
Granule Feeding & Storage System
An inclined screw feeder transfers suitable granular materials from a low-level hopper to an elevated receiving bin or storage vessel. Conveying length, discharge height, and hopper dimensions are selected according to the production layout.
System Equipment: Feed Hopper → Inclined Screw Feeder → Receiving Bin
Integration with Existing Processing Equipment
For existing production lines, the feeder can be configured with customized discharge connections, support heights, and suitable electrical controls. Maintenance access, vibration isolation where applicable, and material flow between machines should be considered during installation.
Screw Feeder Customization Options
Sanyuantang offers customized screw feeders with hoppers for different material characteristics, feeding capacities, and installation requirements. Hopper dimensions, screw geometry, construction materials, conveying height, and electrical controls can be specified according to the operating conditions.
Available Customization Options
| Customization | Available Options |
|---|---|
| Hopper Shape & Size | Round, square, rectangular, or customized hopper |
| Hopper Loading Capacity | Selected according to bulk density and loading requirements |
| Screw Diameter & Pitch | Customized for material flow and required feeding capacity |
| Conveying Length & Angle | Horizontal or inclined arrangements |
| Construction Materials | Carbon Steel, SS304, SS316L |
| Feeding Speed Control | Fixed-speed motor or variable-frequency drive |
| Hopper Flow Assistance | Optional vibrator or suitable discharge assistance |
| Support Structure | Fixed, elevated, or mobile support frame |
| Inlet & Discharge Connections | Customized positions, dimensions, and flanges |
| Dustproof Configuration | Enclosed hopper, covers, and sealing arrangements |
| Electrical Controls | Local control panel and compatible automatic feeding functions |
Request a Custom Screw Feeding System
Share your material type, required feeding capacity, conveying height, hopper requirements, and installation layout. Our engineers will review your specifications and recommend a suitable screw feeder configuration.
Customer Installations & Feeding Projects
Below are examples of applications for Sanyuantang’s hopper-type screw feeders across various industries:
Screw Feeder With Hopper Manufacturer & Supplier
Founded in 1994, Xinxiang Sanyuantang Machine Co., Ltd. is a Chinese manufacturer of screw feeders, vibrating screening equipment, and bulk material handling systems. With over 30 years of experience, we operate approximately 8,000 m² of factory facilities, supported by CNC machining, laser cutting, welding, assembly, and quality inspection capabilities.
Sanyuantang manufactures screw feeders with hoppers in carbon steel and stainless steel, offering custom hopper sizes, screw diameters, conveying lengths, and motor configurations. Our engineers also provide feeding and conveying solutions integrated with vibrating screens, mixers, and packaging equipment.
With products supplied to over 70 countries and regions, we provide equipment selection, custom manufacturing, installation guidance, and spare parts support. Contact Sanyuantang with your material specifications, required capacity, and plant layout for a tailored solution and quotation.
Ask about technical services and after-sales support.
FEEDING & CONVEYING
Request a Screw Feeder With Hopper Quote
Send us your material type, required feeding capacity, hopper size, conveying angle, and discharge height. Our technical team will review your specifications and prepare an equipment recommendation and quotation.
Share material properties, feeding capacity and your installation layout.
Screw Feeder With Hopper FAQs
What Materials Can a Screw Feeder With Hopper Handle?
A screw feeder with hopper can convey suitable dry powders, granules, and small bulk materials, including flour, sugar, resin powder, plastic pellets, feed ingredients, and mineral fillers. Material moisture, particle size, and flowability determine the appropriate screw and hopper configuration.
What Is the Feeding Capacity of a Screw Feeder With Hopper?
Feeding capacity depends on screw diameter, pitch, rotational speed, material bulk density, and conveying angle. Sanyuantang publishes a reference capacity of 550–3,300 kg/h for its hopper feeding equipment, with actual output confirmed according to the selected configuration.
Can the Screw Feeder Speed Be Adjusted?
Yes. A screw feeder can be equipped with a variable-frequency drive to adjust screw rotation speed and regulate the material feeding rate. Actual dosing accuracy depends on material properties and the control system.
What Is the Maximum Inclination Angle of a Screw Feeder?
The maximum inclination angle depends on screw design and material characteristics. The published standard LS Series reference lists an inclination limit of 20°, while steeper conveying arrangements require a separate equipment design and capacity assessment.
What Hopper Sizes Are Available?
Round, square, and customized feed hoppers are available. Hopper dimensions and loading capacity are selected according to material bulk density, feeding method, required throughput, and available installation space.
Can a Screw Feeder Handle Wet or Sticky Materials?
Some moist or cohesive materials may cause buildup, bridging, or blockage inside the hopper and conveying tube. These applications require an engineering review and may need specialized screw geometry or alternative feeding equipment.
What Is the Difference Between a Screw Feeder and a Screw Conveyor?
A screw feeder is primarily designed to control the discharge of material from a hopper or storage vessel, while a screw conveyor mainly transfers material between locations. Both use rotating screws, but hopper loading, screw geometry, and operating controls differ according to their functions.
Can a Screw Feeder Connect to a Packaging Machine?
Yes. A hopper screw feeder can supply suitable powders or granules to packaging machines through a customized discharge connection. Feeding height, material delivery rate, and control compatibility must be matched to the packaging equipment.
Can the Hopper Be Equipped with a Vibrator?
Yes. A hopper vibrator can be installed to assist material discharge for suitable powders that tend to bridge or flow inconsistently. Its suitability depends on hopper construction and material behavior.
What Spare Parts Are Available for a Hopper Screw Feeder?
Common replacement parts include screw shafts, screw flights, drive motors, bearings, seals, and electrical components. Replacement parts should be selected according to the machine model and original equipment specifications.