| 摘要 |
Apparatus and methods for preparing foundry sand mixes, using a pre-mix tank to pre-mix water and particulate bond material to make a water/bond slurry, then delivering the slurry into the foundry sand recovery stream. The slurry is mixed with return sand, and then discharged for use in making foundry molds. Delivery of the slurry to the sand stream can take the place of all particulate addition of bond to the sand stream. The slurry optionally is worked through a recycle stream, an accumulator tank, or both. A invention contemplates mixing, recycling, holding, and delivering the slurry to the sand system. The slurry can be delivered to multiple sand system entry loci at the mixer/mullor and/or the sand cooler. Slurry can be made up in batches or on a continuous basis. Slurry delivery can be batch, or continuous, with optional variability in rate of slurry delivery.
|
