Question 15 (Textile Engineering & Fibre Science)
Which of the following shedding mechanisms provides control of individual warp thread during weaving ?
| (A) | Crank |
| (B) | Tappet |
| (C) | Dobby |
| (D) | Jacquard |
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Frequently Asked Questions | FAQs
What are the types of shedding mechanism?
In weaving, the shedding mechanism is responsible for creating the opening or “shed” through which the weft yarn is passed during weaving. There are several types of shedding mechanisms used in different types of looms. Here are some of the most common types:
Treadle shedding: This type of shedding mechanism is used in a foot-powered or manual loom. It involves the use of foot pedals or treadles to raise and lower the warp threads, creating the shed for the weft yarn to be passed through.
Cam shedding: This type of shedding mechanism is used in some types of power looms. It involves the use of a rotating cam or disc to control the movement of the harnesses that raise and lower the warp threads.
Dobby shedding: A dobby shedding mechanism is used in more advanced power looms. It involves the use of a special device called a dobby, which is capable of controlling a large number of individual warp threads. The dobby mechanism allows for intricate and complex patterns to be woven.
Jacquard shedding: The Jacquard shedding mechanism is the most advanced type of shedding mechanism used in modern power looms. It involves the use of a system of punched cards or computer programming to control the individual warp threads, allowing for the creation of highly intricate and detailed patterns.
The choice of shedding mechanism depends on the complexity of the pattern being woven, the type of loom being used, and the desired speed and efficiency of the weaving process. Each type of shedding mechanism has its own advantages and disadvantages, and the choice of mechanism can have a significant impact on the quality and appearance of the finished fabric.