See the part before you mould it.
RotoSim is process simulation software for rotational moulding. Feed it a CAD model and it predicts wall thickness, cycle time and final part dimensions before you heat a single gram of powder.
Being rebuilt from the ground up for modern hardware. Not yet available. Register now to help shape it and be first in line.
Trial and error is expensive.
Every new part starts with guesswork. You pick an oven temperature, a rotation ratio and the speeds, run the machine, cut the part open, measure the walls, and adjust. Then you do it again. Each loop burns real money.
Wasted material
Every failed shot is powder scrapped and reground, or thrown out. On expensive engineering resins that adds up fast.
Energy and oven time
Ovens run hot for hours per iteration. Every test cycle is gas and electricity spent proving what a model could have told you.
Time to first good part
Weeks of tuning while the machine makes samples instead of sellable parts. Slower quotes, slower launches.
CAD in. Answers out.
Import the CAD model of your part, set your process, and RotoSim simulates the shot. You get the numbers that decide whether a part works, on screen, before the oven.
Import CAD
Load the model of the part you want to mould.
Set the process
Rotation ratio, speeds and oven temperature profile.
Simulate
The model runs the powder, heat and shrinkage.
Read the results
Thickness map, cycle time and finished dimensions.
Wall thickness distribution
See where the wall runs thick and thin across the whole part, before a single one is made.
Cycle time
Predict how long the shot takes, so you can quote and schedule the oven with confidence.
Final part dimensions
Account for shrinkage and see the finished size, not just the size of the mould.
Polymer build-up
Watch the powder lay down on the mould wall through the cycle, layer by layer.
Dial it in before you burn a run.
Change the rotation ratio, the speed or the oven profile and simulate again. Find the material distribution you want and the shortest safe cycle without touching the machine. When the numbers are right, take proven settings to the floor.
Six-point tracking
Follow up to six points on the mould surface relative to the powder pool. When a corner comes out thin, you can see exactly why.
The physics under the hood.
Rotational moulding is deceptively hard to model. RotoSim is built on the science that makes it possible, the same modelling work that put its origins on the map.
Granular flow
How powder tumbles, circulates and distributes inside a biaxially rotating mould, moment to moment.
Heat transfer
Conduction through the mould wall, plus the melting and crystallisation of the polymer as it heats and cools.
Shrinkage
How the part pulls away and contracts as it cools, so predicted dimensions line up with the real ones.
A proven idea, not a new gamble.
RotoSim was created at Queen's University Belfast between 1994 and 1996, out of the research group that the rotomoulding world still treats as the authority on the process. It went on to be licensed by moulders, mould makers and polymer producers across 27 countries. For years it was the only process simulation software the industry had.
Then it quietly left the market, and nothing took its place. We think that is a gap worth closing.
We're rebuilding it, and we need to hear from you.
The original ran on the hardware and solvers of the 1990s. We're rebuilding RotoSim from the ground up for modern machines, modern materials and a modern workflow. Building it well takes real money and time, so before we go all in, we want proof the industry wants it back. That is where you come in. The more moulders, mould makers and material suppliers who raise a hand, the faster this happens.
Raise your hand
No cost, no commitment. Tell us you want this and we'll keep you in the loop as it takes shape. Every registration helps make the case to bring RotoSim back.
Want to help build it?
Investors, distributors, technical partners, and moulders who want early access. If you see what we see, let's talk.