| 摘要 |
Food products particularly of meat are extruded cased under pressure. The extrusion pressure, and the energy in the extrudate, makes the circular cross-section the only stable one on emergence from the extrusion head. In accordance with the present invention two unstable shapes, D-shaped (6) as described are extruded each cased (7) from its own extrusion head. The heads are disposed closely adjacent back to back so as to have a generally circular overall profile. An outer casing (8) is fitted over the two heads. On extrusion the two D-shaped pieces abut one another and the outer casing to preserve their shapes until stabilised by freezing. |
