| 摘要 |
The machine comprises an extruder (1) substantially in the form of a hopper, with a loading aperture (8) for the introduction and accumulation of a strand (50) comprising a sweet outer part which is in a plastic state but can crystallize on cooling, and which surrounds a core (52) constituted by a filling. The extruder (1) also has a drawing aperture (8) towards which, in use, the accumulated strand (50) descends under gravity to form a sweet plastic surface layer, and through which this is drawn. The inner walls of the extruder comprise surfaces (9, 13, 16, 17) which are movable so as to exert on the sweet surface layer of this mass a massaging action which tends to impart to this surface layer a flowing movement substantially in the direction of extrusion, so as to resist the tendency of the surface layer to crystallize. |
