Page 52 - Shawl Weaving Artisan - TT

Jacquard shedding mechanism. It is placed on top of a which is necessary for weaving intricate and large-scale
loom to control a large number of warp threads individually, patterns. (Fig 4)

Fig 4

The breakdown of its parts and working mechanism 1 Selection mechanism (The “Jacquard Head”)
A Main parts of the SLSC jacquard: The mechanism
is divided into the selection and the harness systems.

Part Description Function
Hook Vertical metal wires, one for each individually To be selected and lifted by the knives to
controlled warp thread (e.g., a 400-end machine form the shed.
has 400 hooks). They are bent at the top to
engage with the knives.

Needle Horizontal metal rods, one for each hook, To select or deselect its corresponding
passing through the hook’s eye and a perforated hook based on the pattern card.
Needle Board.

Spring box/spring A helical spring located at the rear end of each To push the needle (and thus the hook)
needle. forward, towards the cylinder, ensuring it
aligns with the card face.

Griffe A frame containing several strong, horizontal The primary lifting mechanism. All knives
iron bars called Knives. move up and down together as a single
unit on every pick.

Pattern card A stiff paper or cardboard card with holes To store the pattern information, dictating
punched according to the design (one card per which warp threads are up (hole) and
pick). They are laced into a chain. which are down (blank).

Cylinder A four-sided (or multiple-sided) rotating prism To read the pattern card by pressing it
that presents the punched cards to the needles. against the needle points.
It oscillates (moves in and out) and turns.

42 Textile & Handloom: Shawl Weaving Artisan : (NSQF - 2024) R.T. Ex.No 1.3.28