An Aluminum Puller Machine is a critical component of the extrusion handling system. Located immediately after the extrusion press and the quenching zone, its job is to “grab” the leading end of the aluminum profile as it emerges from the die and guide it down the run-out table. Without a puller, profiles would twist, overlap, or experience uneven cooling, leading to significant scrap and structural defects.
1. Core Functions
Guidance & Alignment: It keeps the profile straight and centered as it exits the die, preventing “snaking” or bending on the run-out table.
Constant Tension: It applies a light, consistent “pull” (tension) to the profile. This helps maintain the dimensional integrity of the shape and prevents the metal from bunching up.
Speed Synchronization: Modern pullers use high-precision sensors to match the extrusion speed of the press exactly (which can vary during the cycle).
Automated Sawing (for Flying Cut models): Some pullers are integrated with a “flying saw” that cuts the profile to the desired length while the press is still extruding.
2. Mainstream Models
Pullers are generally categorized by the number of “heads” or carriages they use to manage the production flow. A. Single Puller The most basic model. One carriage pulls the profile to the end of the table, releases it, and then returns to the press to wait for the next billet.
Best for: Low-speed lines or very long profiles.
B. Double Puller (Mainstream for High-End Lines) Consists of two independent carriages on the same track that “hand off” the profile. While one carriage is pulling, the second returns to the press to grab the next section immediately.
Best for: 10-inch lines and high-volume production where “dead time” must be minimized.
C. Multi-Puller (Triple or Quad) Used in massive industrial setups where multiple strands (multi-hole dies) are being extruded simultaneously at high speeds.
D. Flying Cut Puller Equipped with an integrated saw or shear. It cuts the profile “on the fly” without stopping the extrusion process.
3. Advantages & Disadvantages
