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In this article, magnesium sulfate monohydrate (MgSO\n                    <jats:sub>4<\/jats:sub>\n                    ) and polyvinylpyrrolidone (PVP) were used as raw materials to prepare the slurry, and the component ratios of the slurry and the optimization of its forming process were discussed. The optimum slurry content is 64\u2009wt.% by mass of magnesium sulfate monohydrate and 36\u2009wt.% by mass of binder consisting of PVP-EtOH. The process parameters that include printing speed, extrusion pressure, and the ratio of printing layer height to extrusion diameter were selected as influencing factors. The orthogonal experiment results show that a printing speed of 850\u2009mm\/min, an extrusion pressure of 250\u2009kPa, and a layer height of 510\u2009\u03bcm of the extrusion diameter are the optimized process parameters. Under the optimized printing parameters, the surface roughness of the prepared samples is 23.764\u2009\u03bcm, with dimensional deviations of 0.71%, 0.77%, and 2.56% in the X, Y, and Z directions, respectively.\n                  <\/jats:p>","DOI":"10.1089\/3dp.2023.0136","type":"journal-article","created":{"date-parts":[[2023,9,8]],"date-time":"2023-09-08T11:01:04Z","timestamp":1694170864000},"page":"1768-1786","source":"Crossref","is-referenced-by-count":1,"title":["Parameter Optimization and Precision Control of Water-Soluble Support Cores for Hollow Composite Castings Fabricated by Slurry Microextrusion Direct Forming Method"],"prefix":"10.1177","volume":"11","author":[{"given":"Jiefei","family":"Huang","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan, 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