Wednesday, March 11, 2015

The maximum value of this tension (tensile stress) can also be defined as a value which is from 10

Plastmasi.Ekstruziya.Proizvodstvo tawar foil and listove.Koy type coiler is suitable for you? | Men246's Blog
Science takes a lot of effort in the field winding ustroystva.Taka called TNT (tension, winding, torque - tension, winding torque) principles of the winding are well developed and have been proven and modeled in Web Handling Research Center at the State University of Oklahoma - Stillwater, Oklahoma.
However, determining which of these principles or the proportion of each to be used for proper tawar folding of different types of fabric under specific tawar conditions still considered "art" .This article was written with the intent to help processors to choose best type rewinder to produce sustainable and free from defects rollers foliini / sheet materials (films) button.You will discuss the principles of the winding, how they are used in different types of rolling devices and immediate parameters of the product for which a type rewinder is the most suitable.
Achieving hardness of the rollers is designed differently to different types of winding devices, but the basic principles to build solid roller remain sashtite.Prosto must remember that to wind sustainable one roll, you need TNT:
When the flexible tawar films are wound, the voltage (tension) in the film is generally the dominant winding, used to control the hardness of rolkata.Kolkoto higher tensile stress, e higher strain applied to the film prior to winding, tawar the more rigid will be the wound roll.
The maximum value of this tension (tensile stress) can also be defined as a value which is from 10 to 25% of the elastic limit of the respective tawar material.Kogato given only the tension (voltage) to control the density of the roll it is important that the tension in the winding to uvelechava smoothly with increasing diameter of rolkata.Uvelichavaneto voltage tawar must be between 0 and 50% Usually the voltage increases by 25% when fully wound roll.
When wound elastic films, generally dominant nip in order to control the hardness of rolkata.Naprezhenieto film is controlled to optimize creep and drift (smoothing) of filma.Pritiskaneto tawar control the hardness of the roll by removing the coating film layer of air which follows the film upon entering into rolkata.Kolkoto is stronger compression, the more rigid will be the coiling roll.
The challenge in winding is pressing is sufficient to remove air and winding is solid, as stretched film without introducing too high a voltage in the coiled material to prevent blockage or deformation of the film over a certain amount of roll.
- The weight of the wound film, and its weight per unit area, as well as the tractive force during winding must not affect the strength of pritiskanene (ie. That force should not be affected by these factors).
Torque is the force induced in the center of the coil roll that is transmitted through the layers of rolled film and smooths tawar internal ganki.Usukvashtiya had caused tension in the film when the center of the roller varti.Zatova "tension" and "torque" are Eden the same principle of navivane.Vprochem when the pressure roller is controlled to control the tension in the film, then the torsional force induced by the center of the roller can be controlled to adjust the profile of the hardness of the wound roll.
For winding the film, there are three main methods: a central tawar winding, surface winding, and a combination of both centrally and povarhnostno.Vseki process uses one or more of the principles of the winding (TNT) in order to achieve a hardness of the roll.
Device with a central winding could be such a clamp is used just rolkakadeto tension control hardness rolkata.Takova tawar rewinder may also include a pressure roller, which simply rests on the roll or varhuneya exercise natisk.Takova coiler may use as tension tawar and compression in order to control the hardness of the central rolkata.Pri winding torque tawar on the axis (spindle) in the middle of the roll provides the tension of the film.
An advantage of this folding is that this process can be wound up and softer rolki.Revolverno (with replacement of the rollers by means of the scroll-like tawar revolver) rewinder of this type can provide a quick-change spindles ikratko during the cycles.
A disadvantage of this type of winding is the limitation of the maximum diameter of the roll because the torque is applied in layers of lubricant film.Osven, in these rolling tawar devices are more likely to form a marriage when changing rolls.
When this method is wound flexible films, film tension is the dominant tawar principle navivaneto.Kogato method

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