Most weeks someone walks into the workshop with the same question: "I need to make this thing. What's the best way to do it?"
Fair question, because the answer isn't always 3D printing. Our Townsville workshop also makes silicone moulds, casts resin, vacuum forms plastic, and laser cuts and engraves. Each one is good at something different, and picking the right one can save you a lot of time and money.
We use all of these ourselves on our own projects, so here's how we actually decide.
The Quick Version
| If you need... | Start with |
|---|---|
| One part, a prototype, or something big and odd-shaped | FDM 3D printing |
| Small parts with very fine detail | Resin 3D printing |
| Lots of copies of the same detailed part | Silicone mould + resin casting |
| A thin plastic shell, tray, cover or packaging insert | Vacuum forming |
| Flat parts, signs, panels or anything engraved | Laser cutting and engraving |
Now the longer version.
3D Printing: One-Offs, Prototypes and Awkward Shapes
3D printing is where most projects start. There's no tooling to make first, so going from a file to a part in your hand is quick, and changing the design is as simple as editing the file and printing again.
FDM (filament) printing is the workhorse. It's the right pick for brackets, mounts, enclosures, jigs, replacement parts, cosplay props and anything large. Material choice matters here: PLA+ for general use, PETG or ASA for parts that live outdoors or in a hot car, TPU when it needs to flex.
Resin printing is for when detail matters more than size or toughness: miniatures, jewellery masters, small display pieces.
Where printing stops making sense is volume. If you want fifty of the same detailed part, printing every one of them is slow. That's where moulding comes in.
If you want to go deeper, we've written about FDM and resin printing and filament types before.
Silicone Moulding and Resin Casting: When You Need Copies
These two go together. We make a silicone mould from a master (your original object, a sculpt, or a 3D print we've cleaned up), then pour resin into it to make copies.
It's the right choice when:
- You need a short run of the same part, not just one.
- You want a solid part with no layer lines.
- You want clear, tinted or coloured parts, or something embedded inside.
- You have an original object you want to duplicate and no 3D file for it.
Silicone picks up an incredible amount of surface detail, so whatever is on the master ends up on every copy, good and bad. A common workflow for us is to 3D print the master, sand and prime it until it's perfect, then mould it once and cast as many as needed.
The trade-off is the upfront work. Making the mould takes time and material, so for a single part it's rarely worth it. Moulds also wear out eventually, which is why this suits one-offs to short runs rather than thousands.
Vacuum Forming: Thin Shells, Fast
Vacuum forming heats a sheet of plastic until it's soft, then pulls it down over a shape (called a buck) with suction. The result is a thin, lightweight shell that matches the shape underneath.
Think trays and packaging inserts, covers and canopies, masks and armour pieces, or lightweight shells for models and props. Once the buck exists, each pull is quick, so it's a great way to make a batch of identical shells.
The buck can be something you bring in, or something we 3D print for the job. The main limits are in the shape: it needs to release from the plastic, so undercuts and very deep, narrow shapes don't work well, and you only get detail on one side.
Laser Cutting and Engraving: Flat, Precise and Repeatable
If your part is flat, the laser is usually faster and cleaner than printing it. We cut wood and acrylic, and engrave metal and glass.
Good uses include signs and plaques, acrylic panels and display pieces, enclosure faceplates, stencils and templates, and personalised or branded items. Engraving is also handy for marking tools, tags and gifts.
Flat doesn't have to mean boring, either. Plenty of 3D objects are really just flat pieces slotted or stacked together, and laser-cut panels pair nicely with printed corners and brackets.
Mixing Them Is Where It Gets Good
Most of our bigger builds use more than one process. A few combinations we come back to:
- Print the master, cast the copies. One perfect print becomes a whole run of solid resin parts.
- Print the buck, vacuum form the shell. Cheap tooling for a batch of thin plastic parts.
- Laser cut the panels, print the fiddly bits. Flat faces from the laser, brackets and joints from the printer.
Questions Worth Answering Before You Ask for a Quote
You don't need to have this all worked out, but the more of it you know, the faster we can point you in the right direction.
- How many do you need? One, ten, or a hundred changes the answer more than anything else.
- How big is it? Rough dimensions are fine.
- What does it need to survive? Sun, heat, water, being dropped, being sat on.
- How should it look? A hidden bracket and a display piece are very different jobs.
- What have you got to start from? A 3D file, a sketch, a photo, or the broken original all work.
Not Sure? Just Ask
Honestly, the easiest way to work it out is to tell us what you're making. We'd rather talk you into the cheaper, simpler option than quote the wrong process.
For 3D printing, you can upload a file and get a quote through Rising Sun 3D. For moulding, casting, vacuum forming and laser work, head to our workshop services page, call us on 0440 130 405, or use the contact form.
Or bring it into the shop at 22 Castlemaine Street, Kirwan, and we'll have a look at it with you.