Melting
Induction melting machines
IGBT induction, flameless and quiet, in three capacity bands from 1 to 20 kg of 24 kt gold. Silver capacity on request.
For casting units · manufacturers · job casters
Equipment for jewellery casting units
From the pattern to the pour, from one supplier.
For jewellery casting units, Semsons Tech supplies induction melting machines from 1 to 20 kg (rated in 24 kt gold, and they melt silver too), an induction vacuum casting machine and a 3-in-1 casting machine, plus the equipment before the pour: jewellery 3D printers and castable resin, vacuum wax injectors, investment mixers and burnout furnaces, and finishing equipment after it.
The casting line
Equipment, stage by stage
| Stage | What it needs | On this site |
|---|---|---|
| Patterns | Jewellery 3D printer and castable resin, or rubber moulds and a wax injector | 3D printers · Resin · wax injectors on enquiry |
| Moulding | Vulcanizer, liquid silicone and frames | On enquiry |
| Investing | Investment powder mixer, flasks, rubber bases | On enquiry |
| Burnout | Burnout furnace | On enquiry · Burnout guide |
| Melting | Induction melting machine, graphite crucibles | IG-1/2, IG-3/4, IG-10/20 |
| Casting | Vacuum or pressure casting machine | IVC-1/2 · 3-in-1 |
| Cleaning & finishing | Water jet, tumbler, magnetic and ultrasonic cleaning | Polishing & finishing |
| Sheet & wire | Rolling mill and wire drawing machine | Rolling & wire drawing |
Stages as in the 2026 catalogue ("10 Steps To Start Your Own Factory"). "On enquiry" items are in the catalogue but have no page on this site yet.
Key machines
Where casting units usually start
Casting
Vacuum casting
Induction-based, bottom-pouring vacuum casting in 1 kg and 2 kg versions.
Patterns
Jewellery 3D printers
FOTO 6K and FOCUS 6K LCD, S3D DLP and WaxJet-510 wax printers, with direct-castable and non-castable resins.
Talk to someone who knows the machines
Tell us what you produce. We reply within one working day with a recommendation, a demonstration or a written quotation.
Fix the defects
Casting guides
- Casting porosity: causes and fixes Gas or shrinkage, and the fix for each
- Castable resin casting problems Rough surfaces, fins and the burnout fixes
- Burnout furnace for jewellery casting Cycle and choice
- Gold melting machine mistakes 10 mistakes and fixes
- Induction melting capacity guide Which capacity to buy
- Wax injection defects Causes and fixes
- How to choose a wax injector Vacuum, digital and automatic
- Choosing a jewellery 3D printer LCD vs DLP vs MJM
- Lightweight gold manufacturing 9K, 14K and studded
Planning
Tell us these, and we size the line
- The largest single melt you pour, and the metals (gold, silver, both)
- Flasks per day and flask sizes
- Patterns: printed, injected wax, or both
- Single-phase or three-phase power on site
- Floor space for melting, casting and burnout
- The defects you fight today, if any
Enquiry
Plan or upgrade your casting line
Tell us what you cast and where it goes wrong today. We size the equipment in writing.
What happens next
-
A reply within one working day
With questions about your flasks and power, or a recommendation.
-
A full-floor plan if you want it
Every stage from pattern to finishing, quoted together.
Casting equipment enquiry
Largest melt, metals, flasks per day and power on site help most.
Questions
Questions from casting units
Which induction melting machine does a casting unit need?
Size it by the largest melt you pour. The IG-1/2 melts 1 or 2 kg on single-phase 230 V, the IG-3/4 melts 3 or 4 kg and the IG-10/20 melts 10 or 20 kg, both on three-phase 440 V. Capacities are rated in 24 kt gold.
Can the induction melting machines melt silver?
Yes, all three melt silver as well as gold. Because silver is lighter, a crucible holds less silver by weight than its gold rating, so ask us for the silver capacity of the model you are considering.
What equipment does a jewellery casting unit need?
From the model to the casting: a 3D printer and castable resin or a wax injector for the patterns, an investment powder mixer, a burnout furnace, an induction melter and a vacuum or pressure casting machine, followed by cleaning and polishing equipment.
What causes porosity in jewellery castings?
Porosity comes in two main kinds. Shrinkage leaves tiny pinholes in thick sections and is fixed with the sprue size and position. Gas porosity leaves bubbles and is fixed with cleaner metal, dry crucibles, a complete burnout and casting under vacuum. Our porosity guide covers both.
Do you supply wax injectors and burnout furnaces?
Yes. Vacuum wax injectors, an automatic wax injection machine, investment powder mixers and burnout furnaces are in our 2026 catalogue. Ask us for the model that suits your flask sizes and volume.