Key Structure Design and Performance Analysis of the Feeding Screw to Lay the Dust

ZHOU Huanwei; ZHOU Mingsong; CAI Liang

doi:10.19554/j.cnki.1001-3563.2025.13.024

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (13) : 214-219. DOI: 10.19554/j.cnki.1001-3563.2025.13.024

Automatic and Intelligent Technology

Key Structure Design and Performance Analysis of the Feeding Screw to Lay the Dust

ZHOU Huanwei^1,*, ZHOU Mingsong¹, CAI Liang²

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Abstract

The work aims to reduce the risk of high defective packaging rates caused by powder dust dispersion during the packaging process, which prevents sealing or results in weak seals when soft bags are used for powder products. By analyzing the characteristics of powders, such as different sugar contents, humidity, and particle size etc., the basic causes of powder dust were obtained by conducting in-depth research on the Hausner ratio and flowability. By changing parameters such as pitch and diameter of the screw, the digital model of variable screw structure was constructed to analyze the variation law of powder pressure inside the screw and obtain the relationship model between flow and pressure. The variable screw structure was designed to avoid or reduce the powder dust and improve the packaging speed and quality. By testing and analyzing results about the dust of various powders, and taking typical peptide powder as an example, the variable pitch screw with a diameter of 8 mm was designed. The packaging weight was 15 g, the packaging yield rate was 100%, and the +3Sigma was 4.44 and the -3Sigma was 4.06 regarding the packaging weight accuracy. A new type of screw structure is designed and optimized based on the powder characteristics, which can effectively reduce the occurrence of dust and improve the soft packaging qualification rate of ultra-fine powder to ensure food safety.

Key words

screw / dust / powder / parameter / Hausner ratio

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ZHOU Huanwei, ZHOU Mingsong, CAI Liang. Key Structure Design and Performance Analysis of the Feeding Screw to Lay the Dust[J]. Packaging Engineering. 2025, 46(13): 214-219 https://doi.org/10.19554/j.cnki.1001-3563.2025.13.024

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