Purpose

The major concern technologies during the processing through three-dimensional printing (3DP) are the mechanical and boundary properties of sand models. The parameters such as activator content, resolution X, layer thickness and re-coater speed play a vital role in 3DP sand components. The purpose of this paper is to recommend the optimal process parameters for the best sand mold properties.

Design/methodology/approach

In this paper, taking the parameters of the activator content, resolution X, layer thickness and re-coater speed as the influence factors, an orthogonal test of L16(44) was designed to discuss the influences of those parameters on the mechanical and boundary properties. Three-point bending (3PB) test was used to characterize the actual bending strength, and the boundary accuracy was assessed by the deviation of the three-point bending samples compared with its design scale.

Findings

The experimental results showed that the resolution X and layer thickness are the main parameters affecting sand mold properties. The strength will attain its maximum when the resolution X and layer thickness are the minimum. The optimal parameters were screened and verified by the confirmation test. The optimal process parameters for best strength and less gas evolution are the activator of 0.19%, resolution X of 0.1 mm, layer thickness of 0.28 mm and re-coater speed of 210 mm/s.

Originality/value

The novelty of this paper is the select of significant parameters on 3D-printed sand model properties. A mathematical model was built to analyze the effect of these parameters. The optimal process parameters for the best properties were got.

中文翻译：

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Taguchi方法研究所选参数对3D打印砂模性能的影响

目的

通过三维打印（3DP）进行处理时，主要关注的技术是砂模型的机械特性和边界特性。活化剂含量，分辨率X，层厚和重涂速度等参数在3DP砂组分中起着至关重要的作用。本文的目的是为最佳砂型性能推荐最佳工艺参数。

设计/方法/方法

本文以活化剂含量，分离度X，层厚和重涂机速度等参数为影响因素，设计了L16（44）正交试验，探讨了这些参数对力学性能和边界性能的影响。 。使用三点弯曲（3PB）测试来表征实际的弯曲强度，并通过将三点弯曲样本的偏差与其设计规模进行比较来评估边界精度。

发现

实验结果表明，分辨率X和层厚是影响砂型性能的主要参数。当分辨率X和层厚度最小时，强度将达到最大值。筛选最佳参数，并通过确认测试进行验证。为获得最佳强度和较少气体逸出的最佳工艺参数是：活化剂为0.19％，分辨率X为0.1毫米，层厚度为0.28毫米，重涂机速度为210毫米/秒。

创意/价值

本文的新颖之处在于选择了3D打印砂模型特性的重要参数。建立了一个数学模型来分析这些参数的影响。获得了具有最佳性能的最佳工艺参数。