Sinkers by Diksha Btch 7

8/4/2019 Sinkers by Diksha Btch 7

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KNITTING ELEMENTS

SINKERS


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The Sinker is the second primary knitting

element.

It is a thin metal plate with an individual or

collective action operating approximately at

right angles from the hook side of the needle

bed, between adjacent needles.

Introduction to Sinker


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Objectives of the Sinker

It may perform one or more of the following

functions, dependent upon the machines

knitting action and consequent sinker shape

and movement.

Loop Formation

Holding Down

Knocking Over


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Loop FormationThe main objective of the

sinker is to assist theneedles in loop formation

by sinking or knitting the

newly laid yarn into a

loop.

As its forward edge of

catch (C) advantages

between the two

adjoining needles.

This is only for bearded

needle.


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Holding Down

It is the more common function of the sinker on

modern machines.

It holds down the old loops at a lower level ofthe needle stems than the new loops that are

being formed, and prevents the old loops from

being lifted as the needles rise to clear them

from their hooks.


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Knocking Over

The third function is

a knocking over at

which the needlepasses through the

old loop by drawing

a new loop.

Here, its upper

surface or belly

(B) supports theold loop as the

new loop is

drawn through

it.


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Role Of Sinker In Various Machines

Tricot Warp Knitting Machine

V-Bed Flat Weft Knitting Machine

Circular Weft Knitting Machine


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Tricot Warp Knitting Machine

Objective: A slot or throat is cut to hold or control the loop.

The sinker belly is shaped to assist with landing as well

as knock-over.


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Role in the Tricot Knitting Cycle

0- knocking over position: The sinker bar moves forward into

the holding down position.

60- holding down: The sinker bar is in the forward holding

down position,

120 - swinging through of guide bars & 185- overlapping of

the warp yarns: Holding Down position of the sinker is

slackened.

315- closing of the needles and casting off: The sinker bar

has reached the foremost position.

330- beginning of casting off: The yarns laying into the hooks

are passed through the loops being cast off to the form new

loops.

The sinker bar starts to move forward.


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V-Bed

Sinkers help to hold the fabric in

position down between the

needle beds during the clearing

part of the knitting cycle.

During the knock-over

part of the needle cycle,

the sinkers retract so that

the knock-over of the oldloops can take place.
http://www.knitepedia.co.uk/browse/knit_tech/knit_tech/V_bed_machine/viewer/V_bed__mach_tech_img_1695_1.htmhttp://www.knitepedia.co.uk/browse/knit_tech/knit_tech/V_bed_machine/viewer/V_bed__mach_tech_img_1695_1.htmhttp://www.knitepedia.co.uk/browse/knit_tech/knit_tech/V_bed_machine/viewer/V_bed__mach_tech_img_1695_1.htm


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Special Feature

They are particularly effective when selected

needles along the bed are producing loops at

a faster rate than others, i.e. during multipletucking or holding when fabric is not being

produced uniformly across the width of the

machine.


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Circular Weft Knitting Machine


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b)

a)

c)

d)

e)

Role of Sinker Inthe Knitting Cycle.


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a) The sinkers have moved forward so that the fabric is held by

the sinker throats.

b) , c) and d) show the knitting cycle with the sinkers first moving

forward to grip the fabric prior to clearing .

c) shows yarn feeding with the feeder moving towards the

viewer and positioning the new yarn across the open hook of

the needle.

e) shows the needle moving down after knock-over to draw the

new loop.


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References

www.knitopedia.co.uk

www.newagepublishers.com

www.warpknitting4u.com

Books

Knitting Technology by David J. Spencer Textile- Reference Book For Knitting
http://www.knitopedia.co.uk/http://www.newagepublishers.com/http://www.warpknitting4u.com/http://www.warpknitting4u.com/http://www.newagepublishers.com/http://www.knitopedia.co.uk/


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THANK YOU

Sinkers by Diksha Btch 7

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