초록 ▼

A dry raw cereal material having a starch fraction is fed into the inlet (38) of a twin screw preconditioning unit (10). The dry material is rapidly advanced and mixed in the first two zones (31, 32) and conveyed into a third zone (33). Water is introduced by ducts (42) and is admixed with the dry m

A dry raw cereal material having a starch fraction is fed into the inlet (38) of a twin screw preconditioning unit (10). The dry material is rapidly advanced and mixed in the first two zones (31, 32) and conveyed into a third zone (33). Water is introduced by ducts (42) and is admixed with the dry material to form a well mixed wetted cereal material. The screws (14, 16) include blank segments (14c, 16c) having radially extending pins (40) to create a material plug in the barrel (30) of the preconditioning unit (10). Steam is added to the wetted material in the next zone (34) to form a heated wetted cereal material which is worked in the fourth zone (34) to form a heated precooked non-continuous cereal compacted dough material which is generally maintained below its gelatinization point. The dough material exits the outlet (41) of the preconditioning unit (10) and enters a low shear extended time cereal cooker (46) which finish cooks the dough material to a fully cooked cereal dough which is formed into desirably shaped and sized pellets.

대표청구항 ▼

[ What is claimed is:] [1.] A method for preparing a cooked cereal dough, comprising the steps of:feeding a dry raw cereal material having a starch fraction to a twin screw preconditioning extruder;introducing water into the preconditioning extruder to admix water to the dry raw cereal material to f

[ What is claimed is:] [1.] A method for preparing a cooked cereal dough, comprising the steps of:feeding a dry raw cereal material having a starch fraction to a twin screw preconditioning extruder;introducing water into the preconditioning extruder to admix water to the dry raw cereal material to form a well mixed wetted cereal material having a moisture content of about 25 to 40%; thereafteradding sufficient amounts of steam to the wetted cereal material within the preconditioning extruder to form a heated wetted cereal material having a temperature of about 180 to 220.degree. F. (82 to 104.degree. C.);working the heated cereal material for 10 to about 30 seconds while maintaining the cereal material below its gelatinization point to form a heated precooked non-continuous cereal compacted dough, said dough having:a temperature of about 180 to 220.degree. F. (82 to 104.degree. C.),a moisture content of about 27 to 40%,a density of about 70 to 80 lb./ft.sup.3. (1.12 to 1.28 g/cc)and being discontinuous in form;discharging the heated precooked non-continuous cereal compacted dough from the twin screw preconditioning extruder into a low shear extended time cereal cooker; andcooking the dough for about 30 to 90 minutes without substantial shear to form a low shear cooked cereal dough.