Needle is a hooked metal part which is used for the formation of loops. It is the principle element of knitting machine. All kinds of knitting needle should have the system to make a new loop & return back the old loop.
According to working process knitting needle are two types:
The needle which are driven independently in needle bed during loop formation are called independent needle.
When some needles are fixed in a bar & move unitedly during loop formation, then this types of needles are called united needle.
According to construction of there are three types of needle:
The place in which the needles are set up is called needle carrier. It is part of a knitting machine. Needle bed with movement of independent needle or needle bar with united needle appears here. Needle carrier may flat, circular or dial type.
The needle which has a rigid hook and a latch easily around the axis is called latch needle.
1.The stem, around which the needle loop is formed.
2.The head, where the stem is turned into a hook to draw the new loop through the old loop.
3.The beard, which is the curved downwards continuation of the hook that is used to separate the trapped new loop inside from the old loop as it slides off the needle beard.
4.The eye, or groove, cut in the stem to receive the pointed tip of the beard when it is pressed, thus enclosing the new loop.
5.The shank, which may be bent for individual location in the machine or cast with others in a metal ‘lead’.
The sinker is the second primary knitting element. It is a thin metal plate with an individual or collective action approximately at right angles from the hook side between adjoining needle.
Cam is a third primary knitting element which converts rotary machines drive into a suitable reciprocating motion to give drive to other elements of the needles.
They are two types:-
This types of cam are used in all kinds of machines to give motion to its other elements when the movement cannot be given by the wheel or other element. In knitting machines this types of cam are used generally in full fashioning & warp knitting machine.
They may be elliptical, heart or unequally shape.
The knitting cam is an element which acts directly on to the butt of needles or other elements to produce individual movement.
Two arrangements exist:
a)Revolving cylinder machine.
b)Reciprocating cam carriage flat machine.