IG-1/2
Single-phase induction melting - the capacity band that fits a workshop without a three-phase supply.
Semsons Tech
Jewellery Casting & Induction Melting Machines
Induction melting puts the heat inside the metal instead of playing a flame across it. The catalogue describes the result as fast, clean, uniform and more controllable, with support for purification stages and reduced heat-induced oxidation — plus the practical benefits of flameless, silent operation and better ergonomics at the bench.
Semsons Tech supplies IGBT induction melting across three capacity bands from 1 kg to 20 kg of 24kt gold, plus an induction-based bottom-pouring vacuum casting machine, and the surrounding equipment: vacuum pressure casting, automatic wax injection, investment powder mixers, burnout furnaces and casting accessories.
Models
Machines in this range
IG-3/4
The mid-capacity IGBT melter - 3 to 4 kg per cycle on three-phase supply.
IG-10/20
The largest melter in the range - 10 to 20 kg per cycle, with a dedicated tilting unit.
IVC-1/2
Melts under induction and pours from the bottom under vacuum - the cleanest metal reaches the flask first.
3 in 1 Casting Machine
A further casting platform in the range, shown in the catalogue alongside the IG and IVC machines.
Specifications
Compare the range
| Parameter | IG-1/2 | IG-3/4 | IG-10/20 | IVC-1/2 (vacuum casting) |
|---|---|---|---|---|
| Crucible capacity (24kt gold) | 1 kg & 2 kg | 3 kg & 4 kg | 10 kg & 20 kg | 1 kg & 2 kg |
| Power supply | Single phase 230V/50Hz | Three phase 440V/50Hz | Three phase 440V/50Hz | Three phase 440V/50Hz |
| Output power | 3.5 kW | 7 kW | 12 kW | 7 kW |
| Technology | IGBT | IGBT | IGBT | IGBT |
| Melting time | 4–6 min | 6–8 min | 15–20 min | 4–6 min |
| Max. temperature | 1200 °C | 1200 °C | 1200 °C | 1200 °C |
| Cooling | Water chiller | Water chiller | Water chiller | Water chiller |
| Weight | 120 kg | 150 kg | 220 kg | 255 kg |
Answers
Common questions
Written to be useful before you buy, not after.
How long does induction melting take?
Catalogue-stated melting times are 4–6 minutes for the IG-1/2 (1–2 kg) and the IVC-1/2 vacuum casting unit, 6–8 minutes for the IG-3/4 (3–4 kg), and 15–20 minutes for the IG-10/20 (10–20 kg). All four are rated to a maximum 1200 °C.
What power supply does an induction melting machine need?
The IG-1/2 runs on single phase 230V/50Hz at 3.5 kW, which is why it suits smaller workshops. The IG-3/4 and IVC-1/2 need three phase 440V/50Hz at 7 kW, and the IG-10/20 needs three phase 440V/50Hz at 12 kW. Confirm your incoming supply before selecting a capacity band.
Why choose induction melting over a torch?
Our catalogue describes induction melting as fast, clean, uniform and more controllable, capable of supporting purification stages and reducing heat-induced oxidation. In day-to-day terms: flameless and silent operation, reduced thermal shock, better productivity and a more comfortable bench for the operator.
What is bottom pouring vacuum casting?
The IVC-1/2 melts under induction and pours from the bottom of the crucible under vacuum, rather than tipping from the top. Bottom pouring means the cleanest metal enters the flask first, and vacuum reduces gas porosity in the casting.
Do I need a water chiller?
Yes — every induction model in the range is specified with a water chiller as its cooling system, and the stated machine weights include it. Factor the chiller footprint into your layout: 630 × 630 × 960 mm on the IG-3/4, IG-10/20 and IVC-1/2.
Get in touch
Enquire about Casting & Induction Melting Machines
Tell us what you are producing and we will recommend the right model — including when the honest answer is that you do not need this machine yet.
Enquire about Casting & Induction Melting Machines
Share your production requirement and we will come back within one working day with the right model, a realistic throughput estimate and a quotation.