Grey iron
HT150 / HT200 / HT250 / HT300
Process route
From customer drawing to packed pallet. Everything except a few special processes happens under our own roof.
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01
Engineering review & 3D verification
CAD and CAE review of the drawing — shrinkage allowance, gating and feeding, machining stock — with 3D scanning used to verify the tool and the first casting.
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02
Foam pattern moulding
EPS beads are pre-expanded, aged and steam-moulded in aluminium tooling, then cooled and stripped. Multi-cavity tooling is used for high-volume parts.
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03
Pattern assembly
Patterns are trimmed, glued into assemblies, gauged and stored to a controlled drying schedule before coating.
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04
Refractory coating & drying
Patterns are dipped in refractory slurry — mixed in a large stirred tank — then dried in a controlled room. Coating thickness decides surface finish and burn-on.
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05
Moulding & pouring
Lost-foam moulding in dry sand with vacuum assistance; induction furnace melting with spectrometer checks on chemistry before the pour, and pouring temperature logged per heat.
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06
Cleaning & heat treatment
Knock-out, shot blasting, riser removal and grinding; normalising, annealing or quenching and tempering where the drawing calls for it.
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07
Machining
CNC machining centres and boring mills rough and finish faces, bores and bolt patterns to the drawing; critical features are re-checked after machining and a dimensional report is issued with each batch.
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08
Coating, inspection & packing
Primer and top coat on a hanging conveyor line with a sealed spray booth and off-gas treatment, then final inspection and export packing.
Process photos
3D scanning and verification
Foam pattern moulding
Pattern assembly
Refractory coating and drying
Moulding and pouring
Cleaning and heat treatment
Machining
Coating, inspection and packing
Equipment & capacity
Capacity figures below are the plant's own; group figures are labelled as such. Equipment lists are indicative and can be confirmed against the on-site register during an audit.
- Casting capacity
- Up to 30,000 t of castings per year
- Max casting size
- 2,000 × 1,800 × 1,200 mm
- Max casting weight
- 2.5 t
- Melting
- Medium-frequency induction furnaces with spectrometer control
- Pattern shop
- Multi-station steam foaming machines with aluminium tooling and a mould store
- Moulding lines
- Lost-foam (expendable pattern) line with vacuum-assisted dry sand; resin-sand and shell moulding available in group plants
- Machining
- CNC machining centres, boring and milling machines, CNC lathes
- Finishing
- Shot blasting, gas-fired heat-treatment furnaces, sealed paint line with off-gas treatment
- Inspection
- Optical emission spectrometer, handheld 3D laser scanning, hardness testers, non-destructive testing
- Site
- 70,000 m² site / 15,000 m² workshops; 15 km to the Beijing–Shanghai expressway
Materials we pour
Ductile iron
QT450-10 / QT500-7 / QT600-3 / QT700-2
High-performance ductile iron
As-cast QT800-5, Si-strengthened ferritic ductile iron, low-temperature ductile iron
ADI
Austempered ductile iron for wear parts
Steel castings (group)
Precision steel castings and high-manganese steel
Weldability, machinability and heat-treatment condition are agreed per part during engineering review.
Send us a drawing, get a price
Tell us the material, the annual volume and the finishing you need. Quotes usually go out within one working day.