The NETCore® breaker core technology developed by GTP Schäfer enables the effective removal of risers with large contact areas without the need for time-consuming cutting and sawing work. This significantly reduces the amount of fettling required. Now the Grevenbroich-based company has expanded its innovative NETCore® breaker core technology with the development of a complete product portfolio for specific applications.
The NETCore® breaker core technology developed by GTP Schäfer facilitates the efficient and process-safe removal of risers with large contact areas to the casting. This almost completely eliminates the otherwise usually time-consuming cutting and sawing work.
Many foundries especially in large-scale casting face a problem: Above a certain riser neck diameter, the riser residues can no longer be easily knocked off.
The reason for this is that conventional breaker cores often tend to cause severe mineralisation at the base of the riser with a modulus of more than 5.0 cm in the hand-mould area due to high thermal loadings.
The result: Large, cauliflower-like structures form at the riser neck. In most cases, such undesirable sintering cannot easily be removed by blasting or chipping off the riser residue, as there is no process-safe breaking point.
This contributes to an increased rejection rate. In addition, the use of heavy tools during knocking off the riser involves the risk of mechanical stress on the component or of the riser residue breaking into it. All these aspects have so far significantly increased fettling efforts.
In line with its claim to offer intelligent solutions for the everyday challenges of foundries, innovation and technology leader GTP Schäfer is tackling the problem with its penetration-free NETCore® breaker cores for risers with a modulus of 5.0 cm and above: This innovation shows no sintering at the riser neck and results in a clear and process-safe breaking edge. This ensures an easy and clean removal of the riser residue.
NETCore® incorporates a refractory mesh in the breaker core. This provides the riser neck with a clearly defined and predetermined breaking point after the solidification of the casting. This results in significantly less force required when knocking off the remaining riser residue. As a rule, a single, light hammer blow is sufficient for clean knock-off.
In addition to the improvement of process reliability, NETCore® enables a significant reduction of cleaning effort or costs.
GTP Schäfer has now expanded its innovative NETCore® breaker core technology into a complete, production-ready portfolio of solutions for specific application areas.
GTP Schäfer will present the innovative NET-Technology® including NETCore® and much more from June 12 – 16 at GIFA 2023 in Düsseldorf, hall 12, booth E 29 & E 30.