Louis) has introduced a newly developed resin-coated sand that is crystalline silica free, GDC Shell Core Sand
The DoE results for the variation of both the shoot nozzle and sand flow properties show an established stepped shoot nozzle used with normal core sand
yields usable results without requiring improved sand flow properties.
In a news release, Simpson said Webac will strengthen and expand Simpsons product line to include thermal sand reclamation technology and plants, core sand
preparation technology and plants, fully engineered sand preparation systems and projects and frac sand processing technology for the oil and gas industry.
The molders must also take great care to avoid unnecessary friction between the vanes and the core so the vanes are inserted snug to the core without rubbing loose any significant amount of core sand
. A loose-fitting vane in the core introduces a level of variation in the process that both QCC and Elliott strove to avoid.
Table 1 shows the microwave processing of waste core sand
in a crucible and Table 2 shows the results of using the concept of direct hybrid processing, using techniques analogous to processing within the microwave rotary system.
Green sand shakeout systems require separation of sand and cores from the castings and the elimination of core sand
from the return sand.