Although good dimensional stability has already been achieved in the processing of thermosetting plastics, special applications require processing with high precision.
Back in the year 2000 Christophery introduced selector sliders made of thermosetting plastics that were installed in the automatic gearboxes of cars in series production. These components were ground to achieve the required fit dimensions. Sharp pilot edges (control elements) could also be produced with certainty.
Today, stoppers and bushes are produced by the million for the major transmission makers.
- Stoppers are static closure parts in gearbox units that are processed a continuous operation. Precisions of better than 0.01 mm and residual roughness values of less than Rz 6 can be achieved with certainty in mass production runs.
- Sleeves are dynamically operating components that require internal machining in addition to external machining. Internal diameters with a precision of 0.01 mm can likewise be achieved by honing.
In future thermosetting plastics will be used increasingly in the transmission area and will substitute there for the metal parts used today, with a corresponding saving in costs.
