In automated assembly processes, screws—being fundamental fastening components—have surface cleanliness that directly affects assembly quality. If screws carry oil, metal debris, or dust, it may interfere with torque stability during tightening, and in electronic products, impurities could even cause short circuits. To address this issue, Danikor’s step-type screw feeder incorporates a multi-stage cleaning design, creating a full-process cleanliness solution that minimizes the impact of contaminants on assembly from the source.

1. Hopper Pre-Screening: Controlling Particles at the Source

The screw feeding stage is the starting point of the cleaning process. Traditional vibratory bowls tend to generate metal debris due to friction between the screws and the bowl. In contrast, Danikor’s step-type feeder uses a hopper design without vibration sources. Screws are conveyed smoothly via a stepped track, reducing friction and collision. A built-in dust collection box gathers loose dust and debris, while a vacuum suction component removes residual particles in real time, preventing secondary contamination. This design not only reduces noise but also extends equipment lifespan.

2. Track Conveying: Deep Cleaning of Individual Screws

Once screws enter the conveying track, an independent cleaning module performs surface treatment on each screw. For example, built-in brushes or air nozzles can remove stubborn stains from thread gaps. In cases of heavy oil contamination, an optional solvent spray module can be used for pre-cleaning. At this stage, screw positioning accuracy and conveying speed are optimized to synchronize cleaning actions with the feeding rhythm, ensuring no incomplete cleaning due to timing mismatches.

3. Post-Sorting Vacuum Dust Removal: Fine-Grained Cleaning

After the sorting unit completes screw separation, an independent vacuum dust removal module is activated. Using negative pressure suction, it removes residual dust and micro-particles from the surface of each screw. The module can adjust suction strength based on screw material (e.g., aluminum or galvanized screws) to avoid damaging surface coatings. For instance, softer aluminum screws use low-intensity pulsed suction, while steel screws can handle higher-intensity cleaning parameters.

4. Dynamic Suction During Tightening: Ensuring Final Cleanliness

In the final tightening stage, the suction tube and tightening module work together. The suction tube contains a micro-filter that captures surface dust while holding the screw. Some models also support compressed air blowing to further clean impurities in thread grooves. Additionally, the system monitors tightening torque in a closed loop, indirectly reflecting the screw’s surface condition. If torque fluctuates abnormally, it may indicate residual contaminants, triggering a stop-and-inspect mechanism.

5. Scalable Functions for Diverse Applications

To meet the needs of different industries, the solution offers flexible expansion options:

• Electronics Industry: Adds anti-static modules to prevent dust attraction due to static electricity.

• Automotive Welding: Adapts to large screws (e.g., M14), using the 4L model to handle screws with a length-to-diameter ratio less than 1.

• Food Machinery: Uses food-grade cleaning agent circulation systems, meeting hygiene and safety standards.

The system also supports barcode traceability, recording cleaning parameters and inspection results for each batch of screws, providing data support for process optimization.

Danikor’s step-type screw feeder, with its multi-level cleaning solution, combines physical isolation, dynamic suction, and intelligent monitoring to achieve full-process cleanliness management—from coarse screening to fine treatment. This staged, modular design not only solves the problem of debris generation in traditional vibratory bowls but also adapts to the stringent requirements of various industrial scenarios through scalable configurations, providing a stable foundation for automated assembly.