| 摘要 |
In the production of ice-cream products which are continuously extruded after passage of a flowthrough freezer, it would be ideal if the ice-cream could hereby be brought down to a discharge temperature of -12 to -25 degrees centigrade, as the products could then be brought directly to final storing. So far, however, this has not been practically possible, since the use of conventional production technique with associated. throughflow freezers creates fatal problems with respect to an unacceptable compaction of the air filled ice-cream and the heat development by the conveying and scraping effect of the conveyor worm in the throughflow freezer. The invention provides for a solution of both of these problems, partly by ensuring an acceptable air filling in using an adjustable resistance at the discharge side of the freezer, and partly in that this freezer itself is provided with a conveyor worm which, for effecting a very low scraping speed, has a very high pitch and is driven with an unusually low speed of rotation. |
