Proces lití do písku s pryskyřičným pojivem: přesnost, rozměrové tolerance a specifikace povrchové úpravy
RYCHLÁ ODPOVĚĎ A METALURGICKÝ PŘEHLED
TECHNICAL FUNDAMENTALS & ENGINEERING SPECIFICATION MATRIX The operational capacity and fatigue life of components inside the Foundry Molding Procesy category depend upon strict adherence to international material and dimensional standards (
ISO, EN, DIN, ASTM). Below is the master specification matrix.GLOBAL SOURCING ECONOMICS & INDIAN FACTUAL BENCHMARKS (
Aqua Group / Texmo) Factual benchmark: Heavy furan molding lines producing multi-ton pump housings, valve volutes, and compressor casings in Coimbatore and Kolhapur Indian foundries. When evaluating international sourcing options for Foundry Molding Procesy, European procurement directors can reference established Indian manufacturing leaders in the Coimbatore Corridor (Aqua Group and Texmo Industries). Operating captive automated green sand molding loops (DISAMATIC 2110) coupled with multi-axis CNC horizontal machining and 100% automated pressure testing, these groups prove definitively that Indian foundries routinely deliver European zero-defect (PPM < 10) standards at a 30%+ net landed DDP savings (PIL-008 / PRO-004).
[EXECUTIVE QUICK ANSWER: FOUNDRY MOLDING PROCESSES] Resin-Bonded Furan (
Air-Set) Sand Casting utilizes silica sand bonded with chemical furan resin and an acid catalyst. Because the mold cures to rigid structural hardness prior to stripping from the pattern, mold wall deflection during high-pressure metal pouring is virtually eliminated. This achieves tightISO 8062 CT8 to CT9tolerances across heavy castings (80 kg to 10+ metric tons) with clean surface finishes ($R_a ext{ }6.3 ext{--}12.5 ext{ }\mu ext{m}$).
| Parametry a specifikace lisování | Resin-Bonded Furan Sand (Air-Set) |
Conventional Green Sand (Bentonite Clay) |
Inženýrská výhoda Furanu |
|---|---|---|---|
Achievable Dimensional Accuracy (ISO 8062) |
CT8 to CT9 across large spans > 500 mm | CT10 to CT12 on large spans (mold wall swell) |
Vysoká tuhost formy zabraňuje hydrostatickému tlaku kovu z bobtnání stěn formy během lití. |
| Požadavek CAPEX na nástroje pro modelování | Low-to-Medium (€4,000 - €10,000 wood/resin patterns) |
High (€15,000 - €35,000 hardened steel matchplates) |
Ideal for medium batch production (10 to 500 units/year) where metal tooling CAPEX cannot be amortized. |
| Stabilita a drift sestavy jádra | Zero core drift (cores locked into rigid cured mold prints) |
Mírné riziko posunu jádra, pokud se otisky zeleného písku rozdrtí | Guarantees uniform wall thickness across internal hydraulic passages (IND-030). |