Make a silicone mould from a 3D model
The Jarvis 3DP mould generator turns any 3D model into a printable two-part mould for silicone casting, with locating pins, a pour channel and air vents. It also tells you how much silicone you need and what it costs before you print.
What is a 3D printed mould for casting?
To make several copies of a part you can print it once, build a mould around it and cast resin, plaster, wax or silicone in that mould. The mould generator does the hard part: it builds a block around your model and splits it into two halves that lock together with pins.
How the mould generator works
The tool runs in your browser:
- Upload your model as an STL file.
- The tool builds a block around it and splits it into two matching halves.
- A pour channel and air vents are added so the material flows in and the air escapes.
- Check the silicone volume and cost report, then download the two mould halves and print them.
After printing, you fit the two halves together with the pins and pour through the channel.
Material and size
Printed moulds are usually made in PLA or PETG. The mould surface shows directly on the cast part, so a lower layer height gives a smoother finish, and you can sand or coat the surface lightly. The casting material must suit the mould material, and a mould release agent helps if needed.
The mould is larger than your model because it includes the block around it, so make sure both halves fit your printer’s bed before you print.
Who is it for?
It is for miniature and figure makers, jewellers and small production workshops, resin and plaster hobbyists, and anyone who wants dozens of cast copies from one printed model.
Frequently asked questions
What does the mould generator do?
It turns your 3D model into a two-part mould that you print on a 3D printer and join with pins. A pour channel and vents are part of the design.
Which file do I upload?
Upload your 3D model as an STL file. The model should be closed, without holes, so the mould is built correctly.
What can I cast in a printed mould?
Silicone, resin, wax and plaster are the most common. The material must suit the mould material, and a mould release agent can help.
How do I know the silicone cost?
The tool gives a report with the silicone volume you need and its cost, so you know how much material to prepare before printing.
Should I print the mould myself or order it?
Either works. If you have a printer, print the two halves yourself; otherwise send the files through the custom request form.
Turns any 3D model into a printable two-part mould, with pins, a pour channel and vents.
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