Development Work with RPT Parts Using 3D Printing

The term RPT = Rapid Prototyping Technology refers to processes allowing the rapid fabrication of casting moulds for prototypes by successively adding material layer by layer.
Development work in our Foundry is already in full swing to optimally use this highly promising technology for MFL.

What are the advantages of this technique
From the developing point of view the quick fabrication of first samples saves construction and model making time. Additionally, the RPT process offers an unlimited range of possibilities regarding the shape and geometry of parts.

How does RPT work in 3D printing 
Loose sand is applied to a rectangular surface in a 0.3 mm thick layer. Then the binder material is sprayed onto the sand bed in the form of the desired geometry just like with an ink-jet printer. After this, another layer of 0.3 mm sand bed is added, and binder material is sprayed onto the sand bed again. This process is repeated until the complete geometrical form has been created. Excessive loose sand will be removed (vacuumed off) in the end.

Clients can immediately profit from this technique
The scope of RPT parts already processed in the MFL manufacturing department ranges from cores (300 x 300 x 40 mm) to create cast cavities up to moulds (shells) reaching the MFL mould size or pattern plate format (1,020 x 660 mm).