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Title: Activities of the different knitting elements in circular knitting machine.
Practical: a) Main knitting elements and their functions b) Loop formation in Single Jersey & Rib Kitting process c) Mechanism of forming Tuck & Miss stitches
a) Main knitting elements and their functions
NEEDLES
The needles are the most important stitch forming elements. They are displaced vertically up and down and are mounted into the tricks or cuts of the knitting cylinder. There are three types of needles namely:
1. Latch needle
2. Spring bearded needle
3. Compound needle.
We can divide a needle into three main parts:
A. The hook, which takes and retains the thread tube looped;
B. The hook opening and closing device, that allows the hook to alternatively take a new thread and release the previous one;
C. A system allowing the needle to move and form the loop.
1=Butt 2=Butt height 3=Back shank 4=Stem 5=Crimp
6=Groove 7=Cheek 8=Hook 9=Hook width 10=Latch 11=Rivet
SINKER The sinker is the second primary knitting element. It is a thin metal plate with an individual or a collective action operating approximately at right angles from the hook side of the needle bed, between adjacent needles. 1=Butt 2=Butt breadth 3=Height of shank
4=Buldge 5=Neb 6=Length of neb
7=Throat angle 8=Sinker platform height
9=Breadth of lower shank 10=Clearance
11=Throat
SINKER OPERATION 1. The held loop is positioned in the throat of the sinker when the sinker moves forward and the needle moves upward for clearing.
2. The sinker remains at its forward position when the needle attains its clearing position.
3. The sinker retracts when the needle comes down after feeding.
4. Sinker remains in backward