Research On The Three Dimensional Printing Process Of Food Materials Based On Extrusion Molding

Three dimensional printing has the characteristics of high flexibility and strong modeling ability as a modern manufacturing technology.In the field of food manufacturing,3D printing can not only endow food with novel shape,but also can realize the mixed printing of many kinds of ingredients.However,the current use of high precision printing materials used in food printers are limited to chocolate,sugar and other materials that can be cooled to solid state at room temperature,staple materials such as flour,on the other hand,can only be shaped in more like two-dimensional form.In addition,food 3D printing's application to food nutrition application r is limited in small range,and the print materials are mostly made in colloid mixture.This article conducted a systematic research in food 3D printing methods,and broadened the range of application of 3D printing in the field of food nutrition.One object of the research is increasing the printing layer and gaining higher printing precision in food 3D printing,the other is expanding the intersection area with food nutrition.First,4 kinds of extrusion mechanisms and extrusion heads were designed based on the property of flour to complete the 3D printer.Secondly,four kinds of priting method were put forward to conduct a contrast experiment to find the most suitable one to fulfill the experiment whose evaluation criterion is based on the width of the flour filament and the maximum layer number.Then the best range of process parameters were gained through siex sets of single variable experiments which were used in practical printing which produced flour models with good quality.At the end of the article,a simulation experiment was conducted to test the 3D flour model's ability of maintaining vitamin C during cooking on which VC dissipate easily under the influence of water and oxegen.The results indicate that 3D flour products can restrain the dissipation of food nutrition,thus makes the application of food 3D printing on food nutrition reasonable.