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Working Flow Chart of Cone Over Picking Mechanism

Working Flow Chart of Cone Over Picking Mechanism
Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College
Contact: 01714419681



Picking:
Picking is the second primary motion in the weaving. It is the action of filling insertion the weft through the warp shed from one edge of fabric to the other edge. Picking may be carried out with or without shuttle. The mechanism of shuttle picking is negative, complicated, elaborate, costly and unsatisfactory. So, now a days, positive picking may be invented in shuttleless looms.
cone over picking mechanism
Cone over picking mechanism
Working flowchart of tappet cone over picking mechanism:

With the rotation of loom/bottom shaft, picking tappet or cam rotates

In revolving, picking tappet nose strikes the cone shaped antifriction roller on the stud and partly rotates the picking shaft and the picking lever/stitch

The picking arm/lever moves from right side to left side of the loom. It will give angular movement which causes the picker to move inward with sufficient velocity to drive the shuttle across the loom

When the picker strikes the shuttle, the shuttle moves into the open shed through race board

Picking is done

The spring causes the picking arm and picker to move back after the delivery of a pick.