For an automatic screw-driving machine to run continuously, screws must be fed in a stable and repeatable way.  

Today’s machines are generally divided into two feeding principles:

• Blow-feed: compressed air blows the screw directly under the screwdriver bit; the bit then travels downward and drives the screw into the product hole.

• Vacuum-pick: the bit uses vacuum to pick up one screw, moves to the hole, and drives the screw.  The cycle time depends on travel distance and axis speed.

Danikor has introduced a new feeding device—the “blow + suction” tightening module—that eliminates the drawbacks of the two traditional methods (screw tumbling, mis-feeds, jams and low speed).

Operating sequence

1. Screw is blown into position.

2. Vacuum picks up the screw and seats it in the bit (cap recognition).

3. Clamping jaws open.

4. Vacuum tube extends and the screw is driven.

5. Mechanism returns to home position.

Key advantages

• Fits into extremely tight spaces.
• Simple operation and minimal maintenance.
• Proven reliability and stable performance.
• Custom-designed vacuum tube and bit supplied by Danikor.
• Compact footprint with standard interfaces for easy integration into work-cells, rotary tables or transfer lines.

Drawing on years of tightening expertise, Danikor offers a full range of standard tightening modules that cover most applications.  Each module can be equipped with Danikor’s depth-control accessory.  Coupled with an intelligent screwdriver, this provides dual-level monitoring and guarantees complete tightening quality control and long-term system stability.