Equipment List & Machining Capability
Sumpro is built on our own casting plant and machining plant, extended to stainless-steel structural welding, precision finish machining and surface treatment. Our equipment covers the full chain: investment casting (silica sol / water glass) → sand casting → heat treatment → CNC precision machining → welding → inspection.
Casting Capability Overview
| Casting Process | Max Weight | Min Wall Thickness | Dimensional Accuracy | Surface Roughness |
|---|
| Silica-Sol Investment Casting | ≤500 kg | 3 mm | CT4–CT6 | Ra 3.2–6.3 μm |
| Water-Glass Investment Casting | ≤500 kg | 5 mm | CT7–CT9 | Ra 12.5–25 μm |
| Sand Casting (resin / clay sand) | ≤3,000 kg | 8 mm | CT9–CT11 | Ra 25–50 μm |
| Welded Structures | ≤5,000 kg+ | — | Per drawing | Per drawing |
CNC Precision Machining Equipment
| Equipment | Model | Brand | Accuracy | Qty |
|---|
| Horizontal CNC Lathe | CK6163 | Yunji | ±0.02 mm | 2 |
| Horizontal CNC Lathe | CK6150 | Yunji | ±0.02 mm | 8 |
| Slant-Bed High-Precision CNC Lathe | CK36-50 | DB | ±0.01 mm | 1 |
| Slant-Bed High-Precision CNC Lathe | C500K | DB | ±0.01 mm | 1 |
| 4-Axis Vertical Machining Center | VMC1160 | Guosheng | ±0.02 mm | 2 |
| 3-Axis Vertical Machining Center | VMC855 | Guosheng | ±0.02 mm | 4 |
| Conventional Lathe | CW6163 | Yunji | ±0.05 mm | 4 |
Total: 20+ CNC and supporting machines | routine accuracy ±0.01–±0.02 mm | finished surfaces to Ra 0.8 μm
Welding Equipment
| Process | Equipment | Materials | Max Capability |
|---|
| GMAW (MIG/MAG) | Panasonic wire-feed welders | Carbon steel, stainless steel | Primary process for structures |
| GTAW (TIG) | Miller / Panasonic AC-DC welders | Stainless steel, nickel-based alloys, titanium | Precision welding |
| Laser Welding | Fibre laser welder | Thin-wall precision parts | ≤5 mm plate thickness |
| Vacuum Brazing | Vacuum brazing furnace | Special joints | Per drawing |
Heat-Treatment Equipment
| Furnace | Max Temp | Effective Volume | Application |
|---|
| Car-bottom electric resistance furnace | 1,200 °C | 2.5 m × 1.5 m × 1.2 m | Solution / annealing / normalizing of stainless steel |
| Pit tempering furnace | 800 °C | φ1.2 m × 1.8 m | Tempering / stress relief |
| High-temperature box-type resistance furnace | 1,300 °C | 0.8 m × 0.5 m × 0.4 m | Solution treatment of nickel-based alloys |
Melting Equipment
| Furnace | Capacity | Application |
|---|
| Medium-frequency induction furnace | 500 kg | Investment casting melting line |
| Medium-frequency induction furnace | 1,000 kg | Sand casting melting line |
Surface-Treatment Equipment
- Shot-blasting machine: removes oxide scale and residual sand from castings
- Sandblasting booth: surface treatment of stainless steel / nickel-based alloys
- Pickling & passivation tank: for stainless steel parts
- Electrolytic polishing equipment: for parts requiring high-cleanliness surfaces
Capacity & Service
| Item | Capacity |
|---|
| Investment castings | ≈15–20 t/month (stainless / duplex / nickel-based) |
| Sand castings | ≈30–50 t/month |
| CNC finish machining | ≈5,000–8,000 pcs/month |
| Welded structures | ≈10–15 t/month |
| Delivery | 2–6 weeks standard; rush orders negotiable |
Need Special-Alloy Components?
Investment casting up to 500 kg · Sand casting up to 3 t+ · 20+ CNC machines · ISO 9001:2015 · Build-to-print · Single pieces and small batches accepted
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