Action of Sinker in Knitting Process | Action of Latch Needle in Knitting
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In knitting, a sinker is a thin steel element that holds down old loops to allow the needle to clear them, supports the newly formed fabric as a knock-over surface, and controls yarn tension to create consistent stitches. Its distinctive shape features a throat to catch fabric and a nose to support it, all while moving in sync with the needles to facilitate stitch formation.
Detailed Actions of a Sinker:
Holding Down Old Loops:
As the needle rises to form a new loop, the sinker moves forward to catch the already formed fabric loop in its throat.
This action prevents the old loop from rising with the needle, allowing the needle's latch to open and then close around the new yarn.
Supporting the Fabric:
After the new stitch is formed and drawn through the old loop (the "knock-over" or "cast-off" process), the newly formed fabric rests on the sinker's nose or belly.
This support prevents the fabric from distorting and ensures it's held at a level lower than the rising needle, which is crucial for creating tight, high-quality fabric.
Controlling Yarn and Stitch Formation:
The sinker retracts as the needle descends to draw the new loop through the old one.
It then moves forward again to push the fabric slightly and position itself to control the fabric as the next yarn is fed.
This controlled movement helps regulate yarn tension, contributing to even stitch formation and overall fabric quality.
Loop Sinking (on some machines):
On certain older bearded-needle machines, the sinker's primary role is to sink or knit the new yarn into a loop between needles, though modern latch-needle machines primarily use it for holding and support.
In essence, the sinker ensures a smooth knitting cycle by managing the old loops and the emerging fabric, working in precise coordination with the needles and cams to build the knitted structure.
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