ISO 12912:2014
(Main)Circular knitting machines — Vocabulary
Circular knitting machines — Vocabulary
ISO 12912:2014 establishes a vocabulary of terms and a system of classification for circular knitting machines used in the textile industry for the production of weft-knitted fabrics.
Métiers circulaires — Vocabulaire
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 12912
First edition
2014-08-01
Circular knitting machines —
Vocabulary
Métiers circulaires — Vocabulaire
Reference number
ISO 12912:2014(E)
©
ISO 2014
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ISO 12912:2014(E)
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ii © ISO 2014 – All rights reserved
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ISO 12912:2014(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Terms and definitions . 1
2.1 Terms for circular knitting machines . 1
2.2 Terms for construction features of circular knitting machine (according to number and
classification of needle carrier) . 2
2.3 Dimensions . 5
2.4 Terms for rotation . 8
2.5 Machine frame and drive . 9
2.6 Stitch forming elements, holder for needles and other stitch forming elements . 9
2.7 Needle control .11
2.8 Cam system .11
2.9 Yarn feed and monitoring system .15
2.10 Fabric take-down .15
2.11 Pattern equipment .17
2.12 Machine control system and monitoring .18
2.13 Lubrication and cleaning system, safety device and special attachments.18
Bibliography .19
© ISO 2014 – All rights reserved iii
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ISO 12912:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 72, Textile machinery and accessories,
Subcommittee SC 3, Machinery for fabric manufacturing including preparatory machinery and accessories.
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INTERNATIONAL STANDARD ISO 12912:2014(E)
Circular knitting machines — Vocabulary
1 Scope
This International Standard establishes a vocabulary of terms and a system of classification for circular
knitting machines used in the textile industry for the production of weft-knitted fabrics.
NOTE See also the ISO online browsing platform (OBP): https://www.iso.org/obp/ui/
2 Terms and definitions
2.1 Terms for circular knitting machines
2.1.1
circular knitting machine
machine for the production of knitted fabrics with independent needles, longitudinally movable, in
circular arrangement, with stitches formed one after the other within every course from yarn fed
crosswise to the length of the fabric
[SOURCE: ISO 7839:2005, 2.1.2]
Note 1 to entry: The circular knitting machine can be specified more precisely with the following details:
— model (e.g. small, large);
— construction features (e.g. single jersey, double jersey, plain interlock, purl);
— needle type (e.g. latch or slide needle);
— number of feeders (e.g. 48 stitch feeders);
— patterning mechanism (e.g. jacquard unit).
2.1.2
small-diameter circular knitting machine
circular knitting machine with nominal diameter up to 165 mm
2.1.3
large-diameter circular knitting machine
circular knitting machine with nominal diameter of over 165 mm
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ISO 12912:2014(E)
2.2 Terms for construction features of circular knitting machine (according to number
and classification of needle carrier)
2.2.1
RL circular knitting machine
circular knitting machine for the production of single-face fabrics (RL) by means of needles arranged in
grooves of one carrier
[SOURCE: ISO 7839:2005, 2.1.2.1]
Note 1 to entry: See Figure 1.
Key
1 needle cylinder 7 sinker cam
2 trick 8 needle cam
3 cylinder cam box 9 yarn guide
4 sinker ring 10 yarn
5 needle 11 holding spring
6 sinker 12 cam box plate
Figure 1 — RL circular knitting machine
2.2.2
RR circular knitting machine
circular knitting machine, used mainly for the production of double-face fabrics (RR) by means of
needles arranged in an axial direction in grooves of the needle cylinder and radially in grooves of the
needle disc (dial) in staggered formation to one another
[SOURCE: ISO 7839:2005, 2.1.2.2]
Note 1 to entry: See Figure 2.
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ISO 12912:2014(E)
Key
1 needle disc
2 needle cylinder
3 disc needle
4 trick
5 cylinder needle
6 trick
Figure 2 — Construction features RR circular knitting machine
2.2.3
interlock circular knitting machine
interlock knitting machine used for the production of plain interlock fabric with needles arranged
opposite each other in needle cylinder grooves in the axial direction and radial in needle disc (dial)
grooves
Note 1 to entry: See Figure 3.
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ISO 12912:2014(E)
Key
1 needle disc
2 needle cylinder
3 disc needle
4 trick
5 cylinder needle
6 trick
Figure 3 — Construction features interlock circular knitting machine
2.2.4
LL circular knitting machine
circular knitting machine for the production of purl fabrics (LL) with two needle cylinders, one upon
the other, within their grooves, which are arranged flush to each other in an axial direction, the needles
moved from one needle cylinder to the other by means of a needle slider
[SOURCE: ISO 7839:2005, 2.1.2.3]
Note 1 to entry: LL fabrics can contain structures like single-face fabric and/or double-face fabric, respectively
can be replaced by them completely.
Note 2 to entry: See Figure 4.
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ISO 12912:2014(E)
Key
1 upper needle cylinder
2 lower needle cylinder
3 needle slider
4 double-ended needle
Figure 4 — Construction features LL circular knitting machine
2.3 Dimensions
2.3.1
machine depth
a
total depth of machine without space requirement for additional equipment
EXAMPLE Bobbin holders, control cabinets.
Note 1 to entry: See Figure 5.
2.3.2
machine width
b
total width of machine without space requirement for additional equipment
EXAMPLE Bobbin holders, control cabinets.
Note 1 to entry: See Figure 5.
2.3.3
machine height
h
total height of machine without space requirement for yarn guide units
Note 1 to entry: See Figure 5.
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ISO 12912:2014(E)
Key
a machine depth
b machine width
h machine height
Figure 5 — Dimensions RR circular knitting machine
2.3.4
nominal diameter
diameter of a circular knitting machine which corresponds to the exact or rounded needle base
diameter d
Note 1 to entry: See Figure 6.
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ISO 12912:2014(E)
Key
1 needle cylinder
d nominal diameter of machine
t pitch
Figure 6 — Nominal diameter and pitch of circular knitting machines
2.3.5
pitch
t
distance between the centres of two adjacent needles in the same needle carrier, in millimetres, with
full use of needles
[SOURCE: ISO 8188:2007, 3.1]
Note 1 to entry: The pitch at circular knitting machines is the distance between the centres of two adjacent
needles on the circumference of the nominal diameter.
Note
...
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