| 摘要 |
A mixt. of edible particle of differing size, shape and density are coated first with an oleoagineous spray coating and subsequently with a dil sweet syrup. This overcoats the fat-coated particles and causes agglomeration. The coatings are effected in separate zones each fo which includes an enclosed screw conveyor having a lenth to radius (L/R) ratio of >=10:1. The conveyor has cut and folded screw flights to cause tumbling and blending of the materials before and after spray application. The mixt. is charged to the screw conveyor space. The flights are adjacent the surrounding chamber walls. Only a minor fraction of the syrup moisture evaporates during coating in the second zone. To apply a coating of a thermoplastic liq. to edible materials such as ready-to-eat granola breakfast cereals. the appts. gives an even distribution of dissimilar particles and coating materials and also there is a minimal loss of material due to build-up on the sides of the conveyor chamber walls. |
