Vacuum casting is a small series production process in which a highly detailed master model is used to create a flexible silicone mould, and liquid casting material is then drawn into that mould under vacuum to eliminate air bubbles and capture every fine detail with remarkable fidelity. It is the technique we reach for when a client needs a run of identical, beautifully detailed pieces that would be impractical to print individually, bridging the gap between one off printing and larger scale manufacturing.
How vacuum casting works
The process begins with a master pattern, the reference object every copy will replicate. At Fabit this master is frequently 3D printed, using DLP for its fine surface, then finished to a flawless standard. A silicone mould is formed around this master, capturing its shape and detail in a flexible, reusable negative. Once the mould is cured, it is cut open, the master removed, and the mould is ready for casting.
To cast a part, liquid resin is poured into the mould, which is then placed in a vacuum chamber. The vacuum is the defining feature of the process. It draws out trapped air and pulls the material into every crevice of the mould, so fine details, sharp edges and delicate textures reproduce cleanly without bubbles or voids. The material cures, the part is removed, and the mould can be used again for the next copy.
Why vacuum casting matters for awards
Many recognition programmes require not one piece but a set, an annual awards ceremony with several categories, a corporate series distributed across offices, or a run of identical trophies for a recurring event. Printing each one individually can be time consuming, and vacuum casting offers an elegant answer. Once the mould exists, each casting reproduces the master faithfully, delivering consistency across the whole set that is difficult to match by other means.
Vacuum casting also expands material possibilities. The casting resins available offer a range of finishes, colours, transparencies and tactile qualities, some emulating other materials convincingly. This means a design perfected as a single printed master can be reproduced in a material chosen for its look and feel. We describe the substrate options across our work on the materials overview.
Where vacuum casting fits
Vacuum casting sits naturally between individual printing and industrial scale manufacturing.
- Small to medium runs: ideal for handfuls up to dozens of identical pieces.
- High detail: the vacuum step captures intricate features faithfully.
- Consistency: every casting matches the master, ensuring a uniform set.
- Material range: a wide choice of casting resins and finishes.
- Cost efficiency at volume: more economical than printing each piece once a set is needed.
The role of the master pattern
Everything in vacuum casting flows from the quality of the master. Any flaw in the master is faithfully reproduced in every copy, so the master is prepared and finished with great care before moulding. This is where our printing and finishing craft directly serves the casting process. A superb DLP printed and hand finished master yields a mould that produces superb castings. The interplay between printing, finishing and casting is exactly the kind of integrated capability described on our custom trophies service page.
Vacuum casting alongside other methods
Vacuum casting is one of several casting routes we use, each suited to different needs. It excels at fine detail and small series in resin. For metallic results and larger or more sculptural forms, other casting approaches such as lost foam and gravity casting come into play. Choosing among them is an advisory decision based on quantity, material, detail and the desired weight and presence of the finished award. Examples of the range this makes possible appear throughout our 3D printed trophy gallery.
What this means for your project
If your recognition programme calls for a consistent set of detailed pieces, vacuum casting may be the ideal route, and it begins with a single perfected master. Share your concept and quantity through our design studio, and we will advise on whether vacuum casting or an alternative best serves your brief, timeline and budget.
Consistency for programmes delivered worldwide
Vacuum casting is especially valuable for recognition programmes that span multiple locations. When identical awards must be presented at events in different cities or countries, consistency is not a nicety but an expectation, and a silicone mould delivers exactly that. Every recipient, whether in Antwerp or across the world, receives a piece that matches its counterparts in detail, finish and feel. Because we produce the master, the mould and the castings in house, that consistency is under our control from the first pour to the last.
This integrated approach also keeps a programme on schedule. There is no waiting on an external caster or reconciling quality differences between suppliers; the whole chain sits with one team that can plan production against your event dates and reply to your enquiry within 24 hours. When the finished set is ready, we handle worldwide delivery so that every award reaches its ceremony intact and identical, honouring the unity a recognition programme is meant to convey.
Frequently asked questions
How many copies can one mould produce? A silicone mould yields a good number of high quality castings before detail begins to soften. For larger quantities we plan additional moulds, which we scope during your enquiry.
Is vacuum casting better than printing each piece? For sets of identical pieces it is often more efficient and more consistent. For a single showpiece, direct printing is usually the better route. We advise per project.
How detailed can vacuum cast pieces be? Very. The vacuum step is designed precisely to capture fine detail without bubbles, faithfully reproducing an intricate master, which is why the quality of that master, prepared and finished in house, matters so much to the final result.
Can vacuum cast awards be finished and coloured? Yes. Castings can be tinted in the material or finished afterward with painting and coating, consistent with the finishes shown on our materials overview, and every piece is finished by hand before we dispatch it anywhere in the world.
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