The NETFrame® product line was specially developed for the reliable, efficient removal of in-gates
and side riser applications.
NETFrame® products utilize a high-temperature refractory mesh that is rigidly clamped into a specially designed metal frame. Due to the enhanced shape of the frame, it “grips” into the molding sand and fixes the NETFrame® in the mold, preventing movement, directly at the mold face against the casting surface.
The refractory mesh introduces a cleavage plane within the in-gate or riser neck area, effectively weakening the material. At this predetermined breaking point, the remaining riser or in-gate can be easily and reliably removed with minimal force, improving process efficiency by obviating the need for grinding or cutting.
“The NETFrame® technology from GTP Schäfer enables us to significantly reduce our processing times for demanding castings that traditionally involve extended cleaning times. Riser removal is facilitated within the normal process, eliminating the requirement for separate cutting operations. Furthermore, our rejection rate for breaking-in defects has significantly reduced.“
This example calculation shows how much time can be saved by using NETFrame® on the smallest model (NF1 – riser neck 50 x 40 mm).
Introduction of a 2-2.5 mm slot between the casting and the riser neck to accommodate the NETFrame®.
Flexible use of NETFrames on existing pattern equipment.
Reliable shooting into core packages is possible.
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.