Basic warp knitting principle

Basic warp knitting principle        

Discussed about knitting fundamentals

NEEDLE:      NEEDLE IS THE PRIMARY knitting element which produces loops during knitting .it  is made by thin metal things consisting hook and but.it also holds the loops during  complex knitting cycle
   

SINKER:  sinker are the another type of second  primary knitting  elements of machine .the main function of it is to hold down knock over the loops.sometimes that produces loops also sinkers gives backword and forward movements during ups and downs motions of needle 


CAM : CAM IS ONE KIND OF ENGINEERING DEVICE WHICH  IS TRANSFORM CIRCULAR MOTION TO  THE RECIPROCATING MOTION.A MACHINE  RPM( ROTATE PER MOTION) DEPENDS ON CAM DEGREE.
                       
                                                 
                                              CAMS
                                                  there are two types of cam 1. engineering knitting cam
                                                                                              2.angular knitting cam
                                                                         
1.ENGINEERING KNITTING CAM =A) CIRCULAR KNITTING CAM

• SINGLE ACTING
• COUNTER CAM 
• BOX CAM               

2.ANGULAR KNITTING CAM=B) GUARD CAM
                                                       C) UPTHROW CAM
                                                       D) STITCH CAM
                                                       E)CLEARING CAM/RAISING CAM>>>
                                                                                                                     1).knit
                                                                                                                     2) tuck 
                                                                                                                      3)miss                                                                   
                                                       
                                               


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MIXING & BLENDING

MIXING & BLENDING :

 MIXING:MIXING COULD BE THOUGHT OF COMBINING OF FIBRES TOGETHER IN SOME WHAT PROPORTIONS WHOSE PHYSICAL PROPERTIES ARE ONLY PARTIALLY  KNOWN SO THAT THE RESULTANT MIXTURE HAS ONLY GENERALLY KNOWN PHYSICAL  PROPERTIES.THE TERM MIXING IT IS GENERALLY MEAN AS THE INTERMINGLING OF DIFFERENT CLASSES OF FIBRES OF THE SAME GRADES WHICH ARE NEARLYN  IN STAPLE LENGTH

BLENDING:

Blending is the intermingling of different kind of fibres or different grades of same fibres which are nearly like in staple length e,g: viscose .polyester blend with cotton

IMPORTANT OF MIXING AND BLENDING :

• Give the required characteristics to the end product
• Achieve effect by varying colour
• less raw material cost
• compensate for variations in the characteristics of the  raw material

YARN

Yarn 
yarn may be defined as a  product of substantial length and relatively small cross-section consisting of fibers or filaments with or without twist 





Classification of Yarn:
There are two types of yarn.    They are:

1.Spun Yarn.&
2.Filament Yarn.

• description

Spun Yarn: The type of yarn in which the fibers are twisted together. The spun yarn can be also classified into three types. They are:              a.) Single Yarn: In which the fibers are spun/twisted together or containing long strand of fibers.

•             b)Complex yarn: A core spun yarn containing a core or long filament. Staple fibers are spun or twisted around the filament or core is called core yarnor complex/ also called spun tex yarn.

            c). Folded or Plied yarn: Two or more single yarn is twisted together. Folded yarn can be also classified into two types. They are:
                        i. Cabled Yarn: Two or more plied yarn is twisted together.
                        ii. Multi-folded yarn: Tow or more cabled yarns are twisted together.


Filament Yarn: Filament yarn is made of one or more continuous strand.

• some filament and folded yarn  sketch 

2.1 filament yarn 

2.2 folded yarn