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  3. Volume 59, 2025
  4. Justification of the Design of Vertical Screw Feeders for Small Doses

Justification of the Design of Vertical Screw Feeders for Small Doses

ISTCIPA.
2025;
Volume 59
: pp. 43 - 54
https://doi.org/10.23939/istcipa2023.59.043
Authors:
  1. Volodymyr Gurskyi
  2. Volodymyr Borovets
  3. Alina Chernei
1
Lviv Polytechnic National University, Ukraine
2
Lviv Polytechnic National University, Ukraine
3
Lviv Polytechnic National University, Ukraine

Purpose. A design solution was substantiated and a screw dispenser for small doses of finely dispersed food products was put into production. Methodology. During the design process, basic methods for calculating machine parts were used in conjunction with the capabilities of CAD and CAE systems. Experimental studies of dosing accuracy were established on the basis of 30 randomly selected samples and methods of mathematical statistics. Results. Rational designs of single- and double-flow vertical screw dispensers were proposed, and a set of verification calculations was performed for strength and reduction of metal consumption of basic structural elements. The drive design is based on the use of frequency-controlled asynchronous electric motors with gear-belt transmissions. The screws have individual drives, and the movements of the agitator and mixers are synchronized on a single separate drive. Scientific novelty. The design solution for a vertical screw feeder, additionally equipped with mixers and a stirrer, has been substantiated. The influence of the operating conditions of the feeder and its kinematic characteristics on the accuracy of dosing has been experimentally established. Practical value. A vertical screw feeder has been developed for packaging in single or paired soft bags, which can be a functional dosing unit for various types of packaging machines for finely dispersed products with a dose size of up to 20 g.

dosage
finely dispersed product
vertical screw feeder
automatic packaging machine
dosage accuracy
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