Additive manufacturing technologies accelerate approved casting technologies.

Additive manufactured casting patterns
portec-gmbh.de / Additive manufactured casting patterns
General
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We are working with several additive technologies to generate pattern for downstreaming operations: stereolithography machines (SLA 250/50, SLA 3500), the FDM-technology and the 3d-printing powder-sticker-system VoxelJet.
With these technologies we are able to produce pattern in the final material of use (FDM), resilient function models (SLA), transparent design models (SLA) or even lost pattern for investment casting (SLA-tetrashell/quick cast; 3d-printing powder-binder-system).
Larger Models will be built in separate parts and in following operations well-defined assembled and glued.

A specific know-how of PORTEC is to deliver large PMMA- and wax-pattern for casting of titanium based on quality standards of mass production but without any solid tool.

 
SLA Solid state laser
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Our SLA 3500, working with a solid state laser, is able to build larger compact models. Usually we use this technology for both, transparent pattern for functional or design studies and hollow pattern with closed surface, used as lost model for investment casting.

 
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Mit diesen Verfahren können wir generative Modelle im Originalwerkstoff (FDM), temperfähige Funktionsmodelle (SLA), durchsichtige Designmodelle (SLA) oder verlorene Modelle für den Feinguss (SLA-tetrashell/quick cast; Pulver-Binder-Drucksystem) herstellen.

 
FDM procedures
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FDM-parts, build from materials ´ABS´ and ´ABS/PC-Blend´, can also be produced with extremely undercuts, since the water-soluble bracket material will easily be washed out.
In addition to that, prototypes of PC (polycarbonate) or PPSU (polyphenylsulfon) are mechanically, thermally and chemically much higher resistant.

 
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Größere Modelle -egal mit welchem Verfahren gebaut- werden in Teilen separat
gefertigt und anschließend gefügt. Eine Besonderheit unseres Modellbaus ist die präzise Herstellung großer PMMA- und Wachs-Modelle für den Titan-Guss in Serienqualität aber ohne feste Werkzeuge.

 
3d-Printing (Voxeljet)
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Resolution
With the technology of 3d-printing by a powder-sticker system (VoxelJet) we directly build lost pattern used for the investment casting. Layer by layer the powder will selectively be glued by sticker material. The advantages are:

  • 30 sec. for one layer
  • 60l pattern volume
  • re-use of non-used powder
  • pattern to be build can be arbitrary positioned
  • working at room temperature
  • basis material PMMA can be infiltrated: new properties of the pattern can be adjusted, e.g. usable as lost model for investment casting by wax infiltration