Abstract
The paper presents the type and dimensional synthesis of intermittent mechanisms for use in a thermoforming machine high-capacity stacking apparatus. The aim of this paper is to realize the intermittent motion of the working part of the stacker – conveyor, with a completely mechanical system that should enable the adjustment of the operating parameters of the stacker at a constant motor speed. Mechanical control ensures high positioning accuracy of the product ejection panel, as well as high repeatability of the motion cycle of the conveyor, which is key. Based on the set requirements, the concept of a planar mechanism of simple structure was chosen, which enables oscillatory movement of the output link for continuous motion of the input link, in combination with a one-way clutch (OWC). Four types of intermittent mechanisms have been proposed. However, multiple configurations of the same mechanism type can achieve the same output link motion interval, which is why 3 configurations for each mechanism type are considered, with a total of 4 output link motion intervals, which is 12 potential solutions for only one mechanism type. Afterwards, dimensional synthesis was performed for each type of mechanism by using the optimization method. Based on the analysis of the results, all of the mechanism types are potentially usable. After additional analyses, the optimal solution was chosen.
Highlights
Plastic is an extremely important and ubiquitous material in everyday life
The previous section analyzed the behavior of an array of simple planar mechanisms – linkages with four elements and cam mechanisms, which when combined with an one-way clutch (OWC) enable the intermittent motion of the final output link
This paper presents the type and dimensional synthesis of different simple structure mechanisms meant to generate the intermittent motion of a conveyor of a thermoforming machine, the high capacity stacking apparatus of cup-like products
Summary
Plastic is an extremely important and ubiquitous material in everyday life. Its production, processing, use and recycling have a huge socio-economic significance in modern society. According to,[1] within the European Union (EU) in 2019, the highest demand for plastic came from the packaging industry, 39.6% of the total amount of plastic used, with the second highest coming from the construction industry at 20.4%. The medical field and the furniture and machine industry used 16.7%. The automotive industry used 9.6%, while a smaller part went to the electronics industry 6.2%, to domestic use and use in sports 4.1%, and only 3.4% to the agricultural sector, with the total amount of plastic used in the EU that year being 50.7 million tons. It should be noted that, in the EU in 2019 alone, the Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
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