Matematical Model for Yarn Unwinding from Packages

Praček, Stanislav; Franci, Sluga

doi:10.3390/mca15050853

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…We can also observe that the relation between the time derivative operations with the two coordinate frames may be written as [11] -0348 -…”

Section: System Forces In Rotating Reference Frames With Non-constant Angular Velocitymentioning

confidence: 99%

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System Forces in the Mathematical Model of Yarn Unwinding

Praček¹,

Krajner²

2018

Proceedings of the 29th International DAAAM Symposium 2018

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The origin of the system forces in equation of motion for yarn is discussed in this paper. We are presented the rotating reference frame is non-inertial and the equation of motion therefore contains three kinds of system forces. In this paper we show how these forces enter the equation of motion for yarn in a rotating reference frame. In addition to the Coriolis and the centrifugal force, there is another fictional force in rotating frames with the dependent angular velocity. We will describe the properties of this force and its effects on dynamics of unwinding yarn.

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“…We can also observe that the relation between the time derivative operations with the two coordinate frames may be written as [11] -0348 -…”

Section: System Forces In Rotating Reference Frames With Non-constant Angular Velocitymentioning

confidence: 99%

“…The last three terms represent the relative acceleration. If this expression is inserted in the Newton's second law for noninertial reference frames, (2) , we obtain [11] …”

Section: Th Daaam International Symposium On Intelligent Manufacturing and Automationmentioning

confidence: 99%

System Forces in the Mathematical Model of Yarn Unwinding

Praček¹,

Krajner²

2018

Proceedings of the 29th International DAAAM Symposium 2018

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“…Cradle to Cradle designed products and certification scheme behind overview and confirm Circular Economy concept with safe chemicals. In the case of textiles treated with chemicals innovation is needed to develop only chemicals which are safe for biological cycles [3], [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Cradle to Cradle® Design Innovations

Krajner¹,

Praček²

2019

DAAAM Proceedings

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The Cradle to Cradle ® concept defines and develops the reuse of products. Compared to traditional recycling, it maintains the same level of quality of raw materials through the life cycles of several products, and only safe chemicals are used. Products are developed in accordance with the principle of maintaining the quality of raw materials over several life cycles, even if we take into account the use, production processes and reuse. This means: no waste, since all ingredients are treated as nutrients for the next cycle. The right materials are included in certain cycles (metabolism) at the right time and in the right place. The approach of a circular economy analyzes the recycling economy in the value chain, which leads to the generation of revenue from recycled materials. Cradle to Cradle ® defines quality preservation as well as the cost-effectiveness of the value-added chain. Re-use materials from Cradle to Cradle ® products allow the cost of materials to be as close as possible to the cost of materials. Even if additional costs arise due to processing or cleaning, they are still lower than the market price of the material. The Cradle to Cradle ® model transposes the principle "quality is equal to quantity" to industrial systems. The flow of materials is designed to be useful and useful for the restoration and conservation of biological and technical resources. This approach stems from the tendency to slow down and reduce the negative impacts on the environment. Breakthrough projects and innovations of Wolford, Bayonix, DyStar, Clariant and Calida will be presented.

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