| 摘要 |
Apparatus, used with a molding machine for densifying and molding concrete products and releasing them in an uncured state wherein the upper surfaces comprise coarse aggregate and fines including a cement binder, textures the upper surfaces of the uncured concrete slab, stone and block products as they pass on a generally horizontally traveling conveyor. A force spraying station is positioned above the conveyor to direct a predetermined volumetric, overhead force spray of liquid at a substantially vertical spray angle with a pressure of only sufficient force to progressively loosen a predetermined amount of fines on the upper surfaces as the products move past. A blow off station at a predetermined distance downstream directs a predetermine curtain of gas only down at the upper surfaces of the products at a predetermined pressure adequate to blow off liquid and loosened fines from the upper surfaces of the products. The products pass on to a flooding station and then to a final blow off station for removing liquid and fines entrained in the flooding liquid.
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