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The brand new RAMPF Tooling two component polyurea casting system, for which first field-tests took place in July 2011, has shown excellent application results with pattern plates as well as core boxes.
According to RAMPF, it is the first product which can replace the currently commercially available DDM systems. Taber and sandblasting abrasion tests according to BDG guideline (VDG data sheet), p 51) confirm that the abrasion resistance is very high as field testing has shown that in excess of 60,000 parts could be produced. Dependent on the forming process and part geometry, the number of parts to be produced is even +10% higher than with the use of the previous DDM containing systems. The new casting system has a very low disposition to sand adhesion and exhibits a good temperature resistance of 80-90°C. Thus the automatic heating up of core boxes during a large series run is no problem. Through the precise imprinting of surfaces, labeling fields can be cast directly without air entrapment.
RAKU-TOOL PC-3458/PH-3958 has been designed to suit face casting used for large series production. After abrasive wear of the surface the undersized cores made out of metal or plastics can be re-coated. Face casting is generally used for the production of pattern plates or core boxes in large series. The backing structure can be adjusted to suit individual requirements for the mould production.
The most effective way to process the material is through the use of a mixing, metering and dispensing machine but it can also be cast by hand using several gatings. During processing, the material, negatives and moulds are pre-heated to ca. 40°C. The excellent final properties of the system are obtained through a post cure over night at 40 °C.
“Already early on we have initiated developments in the area of sustainability” comments Heinz Horbanski, Managing Director at RAMPF Tooling. This is evident through the research and development of the last few years during which RAMPF has continuously produced forward-looking and user friendly new developments. Prime examples are the polyurea casting and gelcoat systems for the production of models, pattern plates and core boxes. The systems are low toxicity and do not need to be labelled with a skull and crossbones sign.
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