Prediction and Analysis of Post-Treatment of Sustainable Walnut Shell/Co-PES Parts by Laser Sintering
  • Yueqiang Yu1, Suling Wang1,*, Minzheng Jiang1, Yanling Guo2,3, Ting Jiang1,*
1 Northeast Petroleum University, College of Mechanical Science and Engineering, Daqing, 163318, China
2 Northeast Forestry University, College of Mechanical and Electrical Engineering, Harbin, 150040, China
3 Northeast Forestry University, Research and Development Center of 3D Printing Material and Technology, Harbin, 150040, China
* Corresponding Authors: Suling Wang. Email: wangsuling@nepu.edu.cn; Ting Jiang. Email: jiangting1112@163.com
(This article belongs to this Special Issue:Polymeric Composites Based on Sustainable Technologies and Renewable Materials)
Abstract
In order to enhance the strength of sustainable walnut shell/Co-PES (WSPC) sintered parts, wax-filtrated post-treatment was carried out. The effects of treating fluid temperature, preheating time and immersion time on the bending strength of WSPC wax-filtrated parts were analyzed by single factor analysis method. To obtain an accurate model for predicting the bending strength of the WSPC wax-filtrated part, the experiments were involved by using Box-Behnken design (BBD). Main parameters, such as treating fluid temperature, preheating time and immersion time, and their interactive effects were analyzed through analysis of variance (ANOVA) and graphical contours. The results demonstrated that all parameters’ direct effects were significant to bending strength of the WSPC wax-filtrated part. Its optimum value was 5.0 MPa when the treating fluid temperature of 70°C, preheating time of 50 min, and immersion time of 20 s. The predicted models effectively validated had good predicting accuracy. The WSPC wax-filtrated part using optimal processing parameters was processed by investment casting, and then the metal casting of dimensional stability and smooth surface was obtained. Investment casting was done using WSPC wax-filtrated parts under optimal process parameters and then metal parts with stable structure size and smooth surface can be obtained, which indicates that WSPC material can be used for investment casting.
Keywords
Agricultural and forestry wastes; three-dimensional printing; selective laser sintering; post processing; response surface methodology