一个简化双螺杆旋转食品挤压机：设计，制造和检验

一个简化双螺杆旋转食品挤压机：设计，制造和检验(中文3900字,3500字)
摘要
一个简化双螺杆旋转食品挤压机的设计，制造和测试在英国，之后在斯里兰卡广泛的测试应用。它是作为一个模式来满足特定的产品和金融限制，较不发达国家，预计将在这些国家扩大生产能力，膨化食品。机器有一个 10 公斤／小时的估计输出而且主要是碳钢所做。螺旋的两类型被做了，一个有固定摊位的14毫米和其他不同的音高段14, 12和10 mm。这个机器是采用变频电机与电子速度控制。该机也有电加热温度控制器和一个压力感应装置。制造成本的估计2000欧元，大多数部分建立在一个相当简单的工作坊。一个米的混合物和干燥的香蕉成功地当做潜在的点心食物和根据最大展延被挤出，最好的结果从一个 120 的滚筒式打印机温度被获得℃，螺旋加速 125个转/每分，输送水分 15%而且与一钢模囗 3 毫米的尺寸相当。当其它可能的压缩螺旋被测试非常相似的结果与没有产品展延中的重要的改良一起达成。1999全文电子期刊公司。版权所有。
关键词：双螺杆挤出机，设计低成本，休闲食品，连续蒸煮器，地方建设，谷类混合物

A simplified twin screw co-rotating food extruder: design, fabrication and testing
Abstract

A simplified co-rotating twin screw food extruder was designed, fabricated and tested in England, followed by extensive testing in Sri Lanka. It was built as a model to meet the specific product and financial constraints of less developed countries and was expected to be used in those countries to widen the production capabilities of extruded foods. The machine had an estimated delivery of 10 kg/h and was made mainly with mild steel. Two types of screw were made, one with a constant pitch of 14 mm and the other with varying pitch in segments of 14, 12 and 10 mm. The machine was powered by a 2.2 kW electric motor with electronic speed control .The machine also had electrical heating with a temperature controller and a pressure sensing device. The cost of fabrication of the
machine was estimated at £2000 with most of the parts built in a fairly simple workshop. A mixture of rice and dried banana was successfully extruded as a potential snack food and on the basis of maximum expansion the best results was obtained from a barrel temperature of 120°C, screw speed 125 rpm, feed moisture 15% and with a die orifice size of 3 mm. When the alternative compress ion screw was tested very similar results were achieved with no significant improvement in product expansion. © 1999 Elsevier Science Ltd. All rights reserved.
Keywords: Twin screw extruder; Design; Low cost; Snack food; Continuous cooker; Local construction; Cereal mixtures

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