Working process of building motion in simplex machine:
Table of Contents
Definition of building motion:
The building is the process of wrapping the product in a simplex or any other machine in a specific manner on a bare bobbin in the correct shape. The motion with the help of which the manufactured product is wrapped in the empty bobbin in the correct shape according to the specific rules and a specific package is made, that method is called Building motion. https://bdfabric.com/how-does-winding-occur-in-roving-frame/
Types of building motion in simplex machine:
There are many different types of roving frame-building motions, but today’s modern roving frames from various companies use electronic devices to build bobbins. So building motion is generally of two types:
1. Gear System.
2. Electronic system.
1. Gear System:
Conventional types of roving frames usually use gear system building motion.
2. Electronic system:
Today, simplex machines from various modern companies use electronic building motions, which operate automatically in a computerized manner.
Objects of building motion in simplex machine:
The objects of the building motion are as follows:
1. Make a roving bobbin by twisting the roving of one layer after another in specific rules.
2. Two sides of roving bobbin Tapering shape to make roving bobbin.
3. As the diameter of the bobbin increases, so that the rate of winding remains the same.
4. Ensure that the roving can be entwined side by side on the surface of the bobbin up and down.
5. Above all helping to make a package i.e. roving bobbin in beautiful form.
Importance of building motion:
The importance of building motion is given below:
1. A roving package is made into a neat shape for use in the next machine.
2. The roving bobbin is made of a tapering shape, so the roving does not come off easily from the roving package.
3. One layer of roving is laid parallel to the surface of the bobbin in a specific shape, resulting in the highest-weight roving package for the size of the bobbin.
4. As the roving is wound on the bobbin, the diameter of the bobbin increases. Building motion keeps the winding rate fixed by reducing the speed of the bobbin as the diameter of the bobbin increases.
5. As each layer is wound onto the bobbin, the length of the layer gradually decreases through the building motion, resulting in a twisted roving bobbin shape that does not unravel easily.
6. All in all, beautifully shaped roving bobbins are produced with ease of transfer and ease of use on subsequent machines.
Functions of building motion:
The functions of building motion are as follows:
1. Escaping motion.
2. Reversing motion.
3. Tapering motion.
1. Escaping motion:
In this motion, as the diameter of the bobbin increases, the speed of the bobbin is reduced, so that the rate of bobbin winding remains the same. The speed angle of the bobbin is controlled by changing the position of the drum belt.
2. Reversing motion:
The bobbin rail swings once up and once down to wrap the yarn/roving in the bobbin i.e. the reversing motion helps change the direction of the bobbin rail.
3. Tapering motion:
This motion helps to form a taper-like shape at both ends of the bobbin. As each layer of roving is wrapped, the bobbin rail helps to form a taper on the top and bottom of the bobbin by reducing the length of the fluctuation.
Mechanism of building motion:
Working process of building motion in simplex machine. The entire process of building motion is accomplished through three mechanisms—escaping, reversing, and tapering. With the help of these three mechanisms, the entire building motion is carried out. The roving on the bare bobbin surface first completes 1 layer of patching. After 1 layer of roving is completed, the bobbin rail is raised and lowered for the next layer in such a way that the next layer of roving does not fall exactly on the previous roving side by side i.e. between the two rovings. https://bdfabric.com/flyer-leading-and-bobbin-leading-principle-in-roving/
Thus again the bobbin rail gives slightly less traverse for the next layer. As a result, the roving bobbin gradually tapers on both sides. After the roving bobbin is full, the formation of the bobbin starts again after changing the full and empty bobbins through roving doffing. The above 3 functions are controlled from one place. This controlled mechanism is called a box of tricks.