Buyers often ask us whether they need a “PU casting machine” or a “PU foam machine”. They are different machines for different parts. As a manufacturer of both, here is the plain difference — and how to tell which one your product needs.
| Factor | PU Elastomer Casting Machine | PU Foam Machine |
|---|---|---|
| Makes | Solid, dense cast PU parts | Foamed (cellular) PU parts |
| Product density | ~1.0–1.25 g/cm³ (solid) | Low: rigid ~30–60, flexible cushions |
| Typical parts | Wheels, rollers, screens, scrapers, bushes | Cushions, insulation panels, mattresses, packaging |
| Materials | MDI/TDI cast elastomer systems | Polyol + isocyanate + blowing agent |
| Blowing agent | No (solid) | Yes (creates cells) |
| Property driver | Hardness (Shore A/D), abrasion | Density, cell structure, thermal λ |
The Simple Rule
If your part is solid and you care about hardness, abrasion and load — you need a casting machine. Wheels, rollers, mine screens, scrapers, bushes and guide rollers are all cast solid PU. If your part is foamed and you care about density, softness or insulation — you need a foam machine. Seat cushions, mattresses, cold-store panels and packaging are foamed.
Some products need both ideas: a rigid foam core (foam machine) with a solid cast skin (casting machine). Tell us the part and we advise the right platform.
Which Machine
For solid cast parts see our PU elastomer casting machine. For foamed parts see the high-pressure and low-pressure foam machines. Still unsure? Read the PU machine buyer’s guide.
FAQ
Can one machine do both casting and foaming?
Is a casting machine high or low pressure?
Do you supply the PU material?
Tell us your part — we will tell you which machine you need and quote.