| 摘要 |
An apparatus for creating extrusions having an inner portion of one substance and an outer portion of another substance. The apparatus includes two bins that each receives a different type of material, two multi-paddle members for feeding material, an inner worm screw conveyor, an outer worm screw conveyor, a casing maintaining distinct materials within the worm screw conveyors while separated from one another, an electronic eye assembly for detecting the amount of material extruded, a material cutting mechanism, a replaceable nozzle, and two independent motors for driving the worm screw conveyors. In operation, the feeding members feed materials from the bins to the worm screw conveyors, which convey the material to the replaceable nozzle. The materials are expelled from the nozzle in such a way that one type of material forms an outer portion, and the other type of material forms an inner portion. The motors are coupled to the conveyors by gears allowing variation of the speed of conveying of materials. By replacement of the nozzle, the ratio of one material to the other in the extrusion can be changed. The variability of the speed of the conveyors ensures that the materials can be extruded at a single rate, so that they will properly form a single extrusion.
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