What is Slasher Sizing Machine?
Slasher sizing machine is used to apply the size material to the yarns for strengthening the warp by adding starch to reduce breakage of the yarns. This is the most used sizing machine for large scale production. The first sizing machine was built in 1803 in England. The major parts of the slasher are the creel, size box, drying units, beaming and various control devices. About all types of yarns can be sized by slazer sizing machine. In this sizing machine the warp is passed through a size liquor bath then through a separating unit and cooling unit.
A typical evaporation rate in a modern slasher sizing machine is around 13 kg/hr/m2. The maximum recommended machine speed is 120 m/min (400 ft/min).
Types of Slasher Sizing Machine:
Slasher sizing machine is classified based on the method of drying (cylinder, hot air or infrared) or according to the method of yarn supply (single end, direct and indirect). In single-end slasher sizing, yarns are fed to the size box directly from the supply packages (sometimes, “single-end” sizing is also used to indicate the sizing of a single warp end). This type of creel is generally used for a small number of yarns and textured yarns. In direct sizing, yarns are fed to the size box from a single creel beam or warper’s beam. In indirect sizing, several warper’s beams (“section beams”) are combined sheet to sheet, forming a final beam for weaving (weaver’s beam).
Main Parts of Slasher Sizing Machine:
B = guide bar
C = Tension roller
E = Emersion roller
F = sizing roller
G = squeeze roller
H = Drying cylinder
I = cooling fan
J = guide bar
K, L = lease rods
M = coloring bowl
N = wraith
O = measuring roller
P = tension roller
Q = Nipper roller
R = warp beam
S = Pressure roller
U = reserve box
V = marking roller
Working Principle of Slasher Sizing Machine:
According to above diagram (Figure 1) slasher sizing machine consists of the following five units:
- Creel Section
- Size Box Unit
- Drying Unit
- Separating Unit
- Headstock
Explain each unit of slasher sizing machine.
A. Creel Section
The creel section is where the warp beams are positioned. Here, the yarns are unwound from the beams and guided through to the next stage. The yarns are arranged in parallel and tensioned as they move forward.
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B. Size Box Unit:
The yarns enter the size box unit where they are dipped into the sizing solution. The yarns are fully immersed here, coating them with the size. After immersion, the yarns are passed through squeezing rollers. These rollers squeeze out excess sizing solution, ensuring that a consistent and appropriate amount of size is left on the yarns.
C. Drying Unit:
After sizing, the yarns enter the drying unit. Here, they are guided over heated drying cylinders. As the yarns pass over these cylinders, the heat evaporates the water from the sizing solution, leaving behind a thin, uniform layer of size.
D. Separating Unit:
After drying, the yarns pass through the separating unit. This unit ensures that the yarns do not stick together after the sizing process and are separated properly to avoid entanglement.
E. Headstock:
This represents the final stage where the yarns are wound onto the weaver’s beam. The weaver’s beam collects the sized and dried yarns, organizing them in a manner suitable for the weaving process.
Founder & Editor of Textile Learner. He is a Textile Consultant, Blogger & Entrepreneur. He is working as a textile consultant in several local and international companies. He is also a contributor of Wikipedia.
