Mold Steels for Stone
Concrete molds: pure during pressing and extruding
AI generated Concrete molds press dry, highly abrasive mixes into blocks and slabs. The mold surface is literally ground away – maximum is required, often with inserts.
The presses or extrudes dry, highly abrasive mixes into concrete blocks, slabs, curbs, and molded parts. What sounds soft – concrete, mortar, aggregates – is for the mold the roughest kind of sandpaper.
Here pure rules. The mold surface is constantly rubbed off by hard material during pressing and extruding, especially at edges, transitions, and nozzles. Thermally, the load is low – it's pressed cold or only slightly heated. That's exactly why the concrete mold differs fundamentally from the glass mold: not heat is the enemy, but abrasion.
What's needed is maximum . Hardened form the base, and at critical points, inserts or hard coatings are added. The combination is what makes the mold economical – bare alone won't withstand constant abrasion for long.
When a concrete mold, only one thing counts: the of the repaired area. A filler that's too soft will be immediately eaten away by the abrasive material. That's why you use a filler and harden the area afterwards – or cover it directly with .
Typical repair cases are battered mold edges, worn pressing surfaces, and worn-out nozzles. Here only a filler that matches the of the helps – plus careful finishing of the mold surfaces.