NETCore® technology was specifically designed and developed for removing high-modulus risers safely and efficiently and subsequently large contact areas on the casting. Traditionally, the removal of these types of risers is facilitated by cutting and grinding, as it is not possible to remove the riser mechanically due to its physical size or without the risk of the contact area breaking into the cast surface upon removal.
A feature of NETCore® is that the breaker core utilizes a ceramic medium. The high refractoriness offers a significant advantage for preventing metal penetration and distortion, the improved breakdown of the core at shakeout ensures the formation of a clearly defined riser neck. NETCore® has a refractory fabric incorporated in the sinter-free breaker core and where placed, the mesh introduces a clearly defined fracture point within the riser neck, systematically weakening the material at approximately 80% of the cross-sectional area. At this predetermined breaking point, the riser rest can be removed quickly and safely through the formation of a breaking edge “0” at the casting surface.
This example calculation shows the time saved by using the NETCore® B250-100 breaker core – feeder neck 100 mm / EN-GJS 400-18LT.
Application Technology and Export Sales Manager
As application consultant and responsible for the export business of GTP Schäfer with more than 30 years of experience within the foundry industry, Nicholas Richardson has developed the NET-Technology® in green sand and steel casting.