Material data for those who want it
Technical Data Sheets
This process uses several different materials that can be digitally combined to offer a range of properties. The key parameter is hardness, measured on the Shore A scale.
Hardness ratings can be achieved from 27 Shore A, through nominal 40, 50, 60, 70, 85, to 95 Shore A. Further these can be produced at the same time as rigid materials offering a one piece overmoulded prototype.
The process can build at either 16 micron or 30 micron layers, which may be important as there is little that can be done to improve the surface finish post build.
If hardness is not known, then there are economies to be had by building several hardness’s in one go. That way the parts can be evaluated quicker and more economically.
One note of caution, material tear strength is not comparable to rubbers and if high elongations are required, then alternatives may need to be considered.
Vacuum casting materials are generally polyurethanes (PU’s). The range of materials is huge and there is a large subset that offers flexibility.
Most hardness values can be emulated, generally within circa 5 points on the Shore A scale.
Materials can be coloured and since they are cast from a tool, offer surface textures.
The best advice is to contact Plunkett Associates with the following information, and we will identify suitable materials.
- hardness required (Shore A)
- any environmental requirements, especially temperature
- aesthetic requirements, colour, texture, printing