Yaa Types Of Weft Knitting Automobile

Types of Weft Knitting Machine

Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College
Contact: 01714419681

Weft Knitting:
There are ii types of knitting: weft knitting in addition to warp knitting. In the to a greater extent than mutual weft knitting, the wales are perpendicular to the course of pedagogy of the yarn. In weft knitting, yarn is knitted horizontally in addition to inwards a round down form. Most of the knitted stuff is produced past times weft knitting. Various types of machine used for production of weft knitted fabric. In this article, all types of weft knitting machine are described amongst feature.

Weft knitting machine (Circular)

Types of weft knitting m/c:
 

***According to the destination product, the weft knitting m/c may live on broadly classified equally either:

1. Fabric m/cs
2. Garment length m/cs

1. Fabric Machine:
Large diameter, circular, latch needle m/cs, knit fabric, at high speed, that is manually cutting away from the m/c afterward a conventional length has been knitted. Most stuff is knitted on round down m/cs either unmarried cylinder or cylinder in addition to dial.

Features of stuff m/cs:

• Large diameter, circular, latch needle m/cs (also known equally yarn goods or slice goods) knit fabric, at high speed.
• The stuff is manually cutting away from the m/c commonly inwards gyre shape afterward a convenient length has been knitted.
• Most stuff is knitted on round down m/cs either single-cylinder (single jersey) or cylinder in addition to dial (double jersey) of the revolving needle cylinder type, because of their high speed in addition to productive efficiency
• Sinker cycle in addition to loop cycle frames could knit high character specialty fabrics amongst bearded needles although round down m/cs employing bearded needles are forthwith absolute, the production rates of these m/cs were uncompetitive
• Unless used inwards tubular body-width, the stuff subway scheme requires splitting into open-width
• The stuff is finished on continuous finishing equipment in addition to is cut-and-sewn into garments or it is used for identify in addition to technical fabrics
• The productivity in addition to patterning facilities of stuff m/cs vary considerably.
• Generally; cam settings in addition to needle set-outs are non altered during the knitting of the stuff

2. Garment Length Machine:
Flat in addition to round down m/cs, knitting garment length sequences which accept a timing or counting device to initiate an additional garment length programming (m/c control) mechanism. This coordinates the knitting activeness to create garment structural repeat sequence inwards a wale wise direction. The garment width may or may non vary inside the garment length.
 

***According to their frame blueprint in addition to needle bed arrangement, the weft knitting m/c may live on broadly classified equally either:

1. Straight bar frame m/cs
2. Flat knitting m/cs
3. Circular knitting m/cs

1. Straight Bar Frame Machine:
Special type of m/cs having a vertical bar of bearded needles whose movement is controlled past times round down applied scientific discipline cams attached to a revolving cam-shaft inwards the base of operations of the m/c. the length of the m/c is divided into a number of knitting heads.
 

2. Flat Knitting Machine:
The typical apartment m/c has ii stationary beds arranged inwards an inverted V formation. The m/cs hit from hand-propelled in addition to manipulated models to automated, electrically-controlled, power-driven m/cs.

Feature of Flat knitting m/c:

• 2 stationary needle bed inwards apartment knitting m/c arranged inwards an inverted V formation
• Latch needle is used
• Angular cam of a bi-directional cam scheme used
• There is a separate cam scheme for each needle bed
• The ii cam systems linked together past times a bridge, which passes across from 1 needle bed to the other
• Carriage amongst determined yarn carrier issued
• Cam scheme is attached to bottom side of wagon
• The apartment m/c is the close versatile of the weft knitting m/c
• Fabric create amongst finer to coarser yarn
• The functioning in addition to supervision of the m/c is uncomplicated
• The stitch length hit is broad in addition to maybe of changing the m/c guess
• Trimmings, edging, collars, to shaped panels in addition to integrally knitted complex garments in addition to other articles

3. Circular Knitting Machine:
Circular m/cs whose needle beds are arranged inwards round down cylinders and/or dials including latch, bearded or chemical compound needle machinery.

Classification of round down knitting m/c:

• Circular bearded needle single-jersey stuff machine
• Revolving cylinder latch needle machine
• Circular garment length machine

a. Circular bearded needle unmarried jersey stuff machine:
Types of machines are divided into ii types:-

• Sinker cycle machine or French/Terrot type m/c
• Loop cycle frame or English linguistic communication type m/c

Both of them accept the next mutual features:-

• Needles are fixed inwards a recolcing circle on needle bed
• Knitting activeness is only achieved past times ancillary elements moving yarn in addition to loops along the needle stem
• Here tubular stuff is knitted amongst its technical dorsum facing outward
• Low productivity but has an mightiness to create odd in addition to super-quality knitted structures

b. Revolving cylinder latch needle machine:
There ate ii primary types of revolving cylinder latch needle machine, namely-

• Open peak or sinker peak or unmarried jersey m/c
• Cylinder & dial m/c or double-jersey mc/

These machines create close weft knitted fabrics. The open-top or single-jersey machines accept 1 laid of needles arranged inwards a cylinder. This 1 laid of needle is controlled past times 1 one laid of cam. They create plainly fabric.

On the other manus the cylinder in addition to dial m/c or double jersey machines accept ii sets of needles. One assail cylinder in addition to thee other assail dial. Dial in addition to cylinder needles rest perpendicular to 1 another. They 1 controlled past times ii separate laid of cams, namely cylinder cams in addition to dial cams. They are either rib or interlock type stuff producing m/c .

Machines of both types may or may non accept patterning capabilities

c. Circular garment length machine:
Circular garment length machines ate to a greater extent than oft than non of torso width size or larger. They accept a cylinder in addition to dial scheme or double cylinder. They equally good may live on of pocket-sized diameter hosiery type. This hosiery type pocket-sized diameter machines may accept a unmarried cylinder or a cylinder in addition to a dial or double cylinders.

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