For aluminum extrusion die shops, finding a highly cost-effective alternative to Extrude Hone AFM equipment—while strictly controlling production costs and guaranteeing polishing quality—is a core requirement for boosting efficiency and reducing expenses. Abrasive Flow Machining (AFM) is the industry benchmark for polishing complex internal passages. However, standard machines are structurally complex and expensive, making them extremely cost-ineffective for routine extrusion die polishing. To address this point, Tongzheng independently developed the TZ-PG specialized model. Designed specifically for the bearing surfaces of aluminum extrusion dies, it utilizes a piston-driven structure precisely matched to the working conditions of profile die polishing. Equipped with our self-developed back-pressure filling polishing technology and specialized fluid abrasive media, the machine can uniformly process die bearing surfaces featuring multiple ports, complex cross-sections, and significant wall thickness variations in a single pass.

It completely solves the problem of uneven manual polishing, delivering uniform and stable surface textures that can directly extend die service life by up to 50%.

Targeted AFM vs. Traditional AFM: How to Choose?

Traditional AFM equipment relies on extreme pressure to force abrasive media into the internal flow channels of parts. While perfect for precision aerospace components, this functionality is massive overkill for aluminum extrusion dies, leaving procurement and operational costs sky-high.

The Tongzheng TZ-PG system borrows the proven principles of fluid abrasive finishing but optimizes them specifically for extrusion dies. Driven by a precision piston, the machine reciprocates a specialized silicon-carbide ceramic abrasive putty back and forth through the die openings to lap the internal bearing surfaces. It achieves high-precision surface preparation at only a fraction of the operating cost of traditional AFM Machines, perfectly adapting to the high-volume die repair and pre-processing demands of profile extrusion plants.

The Major Pain Points of Traditional Manual Lapping

Accelerated Pre-Press Preparation: Compressing Changeover Times

Before a die can be installed in the press, the bearing surface must be trimmed and lapped to ensure smooth metal flow and prevent extrusion defects. Traditional manual lapping takes at least 30 minutes per die, leaving the expensive extrusion press sitting idle and wasting capacity. By using the TZ-PG automated polishing system, the entire process takes just 2 minutes. The bearing surface is perfectly conditioned in a single pass, drastically reducing die changeover wait times and directly increasing the daily production capacity of the extrusion press.

Innovative Semi-Fluid Flexible Polishing Technology

The TZ-PG replaces pure manual labor with an automated, constant-speed, pressure-regulated polishing process. Rigid grinding tools like standard oil stones easily scratch the working surface and can even damage the die's original cavity dimensions. Our specially formulated silicon-carbide ceramic semi-fluid abrasive tightly conforms to the contours of any complex die cavity. During the reciprocating operation, the system automatically maintains constant pressure and feed speed, strictly preserving the die's original cavity dimensions and hardness.

Three Core Advantages

TZ-PG Model Specifications (Covering All Extrusion Press Tonnages)

Say Goodbye to High Polishing Costs

If you are still outsourcing your die polishing to AFM service centers or wasting massive amounts of technician hours on manual lapping, it’s time to upgrade. The Tongzheng TZ-PG polishing system brings the precision finishing process back in-house, giving you total control over your lead times, production costs, and polishing quality—no longer at the mercy of subcontractors.