GATE (TF) Textile 2014 Question Paper Solution | GATE/2014/TF/09

Question 09 (Textile Engineering & Fibre Science)

In a cotton card, the wire point density on

(A)Cylinder is lesser than that on flat
(B)Doffer is greater than that on cylinder
(C)Cylinder is greater than that on flat
(D)Flat is greater than that on doffer
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Frequently Asked Questions | FAQs

What is the point density of carding machine wire?

The point density of carding machine wire, also known as card clothing or card wire, refers to the number of wire points per unit area on a carding cylinder or carding roller. Carding machine wire is a specialized type of textile machinery component used in carding machines, which are used in the process of separating and aligning fibers to form a continuous web or sliver that can be further processed into yarn or other textile products.

The point density of carding machine wire is typically expressed in terms of “points per square inch” (ppi) or “points per square centimeter” (ppcm), depending on the unit of measurement used. A higher point density means that there are more wire points per unit area, which can result in better fiber separation, alignment, and carding efficiency, but may also increase the risk of fiber damage or wire wear.

The point density of carding machine wire can vary depending on the specific application, type of fibers being processed, and desired end product. Typical point densities for carding machine wire can range from around 100 to 300 ppi (40 to 120 ppcm), although higher or lower point densities may be used in certain specialized applications. The selection of an appropriate point density for carding machine wire depends on various factors, including the type of fiber being processed, the desired quality of the end product, and the operating conditions of the carding machine. It is typically determined through experimentation and optimization for a particular carding process.

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