Components or Elements of knitting machine

Knitting Machine
September 25, 2018

Needle

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:

  1. Independent needle
  2. United needle.



Independent needle

The needle which are driven independently in needle bed during loop formation are called independent needle.

United 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:

  1. Latch needle.
  2. Bearded needle.
  3. Compound needle.

Needle Carrier or Needle Bed

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.

Latch needle

The needle which has a rigid hook and a latch easily around the axis is called latch needle.

Main parts of the Latch needle

  1. Hook: This draws and retains the new loop.
  2. Slot: This receives the latch blade.
  3. Slot wall: which are either punched or riveted to fulcrum the latch blade.
  4. Rivet: This fixed the latch in the slot walls.
  5. Latch blade: This locates the latch in the needle.
  6. Latch spoon: This is the extension of the blade& bridge the gap between the hook & stem.
  7. Stem: Carries the loop in the clearing or rest position.
  8. Butt: Cam act on it to reciprocate the needles.

Characteristics of latch needle

  • Most widely used in weft knitting.
  • More expensive than bearded needle.
  • Automatic work.
  • Work at any angle.
  • Needle depth determines the loop length.
  • Except raschel machine, they are placed in groove or tricks.



Uses of latch needle

  • Mostly used in weft knitting machine
  • Double cylinder machine.
  • Simple flat bar machine
  • Warp knitting raschel machine.

Spring bearded 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’.

 

Compound Needle

Sinker

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.

Function of sinker

  • Loop formation
  • Holding down.
  • Knocking over.

Cam

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.

Types of Cam

They are two types:-

  1. Engineering cam 
  2. Knitting cam.

Engineering cam

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.

Knitting cam

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.

Revolving cylinder machine following cam are used

  • 1.Knit cam: This cam helps to form knit loop
  • 2.Miss cam: This cam helps to from miss loop.
  • 3.Tuck cam: This cam helps to from tuck loop.

Reciprocating cam carriage flat machine following cam are used

  • 1. Raising cam
  • 2. Guard cam
  • 3. Stitch cam
  • 4. Tuck cam

 

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