The right model for everyone:
Customized solutions for ring and compact-spinning
Hellwig, Head Product Management Ring and Compact Spinning,
Machines & Systems, Rieter.
Rieter has further upgraded its end spinning product range
with the new ring spinning machines G37 and G38 and the new
compact-spinning machines K47 and K48.
Fig. 1: The new ring spinning machine G 38 is one of
the four new ring and compact-spinning machines. It
offers the highest level of automation, the best
performance and complete flexibility.
Rieter is one of the leading suppliers of ring and
compact-spinning machines. Customers particularly appreciate the
high productivity, low energy consumption and consistent
excellent yarn quality. The two models established on the
market, the ring spinning machine G 32 and the compact-spinning
machine K42, have been joined by four new models – the ring
spinning machines G 37 and G 38 and the compact-spinning
machines K 47 and K 48. But which machine is the best choice for
which market? What advantages do the new models offer? And how
will Rieter customers benefit?
Choosing the right spinning machine
The machines G 38 (Fig. 1) and K 48 are particularly suitable
for markets which have limited personnel availability and which
require particularly high levels of flexibility and yarn quality
simultaneously. With these “all-inclusive models,” customers
benefit from the highest levels of automation, the best
performance, complete flexibility for standard and special
yarns, an electronic drafting system drive, integrated
individual spindle monitoring (ISM premium) and the integrated
slub yarn device.
The G 37 and K 47 were developed for markets where there is
not a shortage of available personnel and the requirements for
flexibility and yarn quality are high. They provide customers
with a high level of flexibility thanks to their unrestricted
application range at full machine length and for all special
yarns. The electronic drafting system drive reduces downtime for
article change. The integrated individual spindle monitoring,
ISM basic, increases operator efficiency – and therefore machine
For customers who rarely change their assortment and who are
active in markets, where personnel are always available, the 2
series machines are the ideal solution. The proven ring spinning
machine G 32 and compact-spinning machine K 42 with mechanical
drafting system drive are ideal for standard applications with
medium and fine yarn counts.
Fig. 2: The premium version of the individual
spindle monitoring (ISM) is incorporated into the
models G 38 and K 48. This reduces personnel
The machine concept for the G 38 and K 48, which features
double-sided suction, allows unrestricted spinning for all
applications at full machine length. Thanks to the integrated
VARIOspin system for slub yarns, customers can change between
standard and slub yarns simply at the touch of a button. The
machines are equipped with the electronic drafting system drive
FLEXIdraft as standard. FLEXIdraft makes it easier to set yarn
parameters. The desired values can be entered directly on the
operating unit. Unlike with the G 32 and the K 42, there is no
need to make mechanical adjustments. This reduces downtime for
article change from 75 minutes to 5 minutes and maximizes
production time. The premium version of the individual spindle
monitoring (ISM) is also integrated (Fig. 2), meaning customers
can save personnel costs by five percent and more compared to
the 2 series. The three-stage indicator concept, which features
signal lamps on the ends of the machine and LEDs at every
spinning position and section, controls the running behavior of
each individual spinning position, optimizes operator guidance
and increases machine efficiency. The customer can access
important data directly on the operating unit of the machine.
Detailed evaluations are possible on request with the spinning
mill monitoring system SPIDERweb. All the applications given for
both models can be produced at maximum machine length. Both
models were designed in Switzerland.
Fig. 3: The unique compacting elements of the K
machines guarantee fully compacted yarns, facilitate
the low energy requirements and keep maintenance
The new machines G 37 and K 47 also offer the electronic
drafting system drive FLEXIdraft. The extremely quick downtime
for article change of under five minutes when changing to
another yarn count increases the productivity of the machine.
Both models are equipped with the integrated basic version of
the individual spindle monitoring – ISM basic – as standard.
Thanks to LEDs at every spinning position and every section,
customers can save around three percent on personnel costs. At
the customer’s request, the machines can also be supplied with
Compact spinning with unbeatably low
For customers who want fully compacted yarns of the highest
quality with maximum strength, the Rieter compact-spinning
machines K 42, K 47 and K 48 are the best solution. Their
unbeatably low energy requirements for compaction are
outstanding: Less than one watt per spindle, just 20% of that of
other solutions. In addition to the well-known sieve drum, the
main reasons for this are the large cross-section of the central
suction duct and the air guide element Detect, which guides the
air flow in a specific manner (Fig. 3).
The air guide element Detect, the sieve drum and the suction
insert are also at the heart of the Rieter compact-spinning
machines. They form the basis for the unique air routing and the
guarantee of fully compacted yarns. The air guide element also
simultaneously monitors quality by creating deviations from the
air flow and therefore from the vacuum. When a limit value is
reached, a marking on the air guide element indicates that the
compacting unit needs checking (Fig. 4). This monitoring allows
a consistently high yarn quality.
Fig. 4: The air guide element Detect for the
ensures consistently high yarn quality.
With all compact-spinning machines, there is no need to
replace compacting aprons: therefore machine downtime is
avoided. Increased efficiency can be achieved as a result,
making it simpler to plan production.
One notable difference between the two new models and the
existing K 42 is the expanded application range. The K 47 and
the K 48 are equipped with a new sieve drum, which now allows
customers to spin blends containing polyester and 100% viscose
alongside cotton (Fig. 5).
Fig. 5: The sieve drum of the new compact-spinning
ideally suited to fiber blends.
Opportunities for even more
The flexibility of customers, i.e. quick adaptation to market
requirements, is a key criterion for remaining competitive
today. Systems for producing soft and dual-core yarns, as well
as twin yarns, are available for all ring and compact-spinning
machines on request. A quality package, also known as the
Q-Package, offers cotton spinners the opportunity to improve
their already-optimized quality yarns even further (Fig. 6).
Rieter offers various solutions for ring and compact-spinning
machines which allow the reliable and productive processing of
Fig. 6: The Q-Package: for specialists wanting to
already-optimized quality yarns made from cotton.
The “EliTe®compact spinning system” is available as an option
on the three conventional ring spinning machines G 32, G 37 and
G 38. It can also be retrofitted at a later date. The system
facilitates the production of high-quality compact yarns. It
covers all yarn counts and can also be used for 100% polyester.
The combination of the unique Rieter spinning geometry with
high-quality technology components forms the basis for extremely
high spindle speeds. This ensures consistently good yarn quality
at maximum production.
The new LENA spindle and the highly efficient 110-kW motor
that drives the spindles offer further significant energy
savings on the four new models. Both are available as options.
The new tube loader ROBOload “wild loading” is available as
an option for the G 37, G 38, K 47 and K 48 (Fig. 7). It is now
performing the task of sorting the tubes. There is no need for
manual alignment. The tubes are placed in a trolley at the end
of the machine. A tilting unit dumps the tubes into the ROBOload;
another device automatically aligns the tubes and guides them
correctly to the cop transport system SERVOdisc, significantly
reducing manual effort. For existing models of the G 32 and K
42, Rieter offers suitable solutions with Rieter After Sales.
Fig. 7: The new tube loader ROBOload “wild loading”
automatically sorts the empty tubes,
reducing the amount of work required enormously.
Keeping the well-proven
Well-known, successful solutions will remain an integral part
of both the ring and compact-spinning machines. Such as the
SERVOgrip system, for example. This prevents thread underwinding
when doffing, and thus keeps the machine clean, thereby ensuring
yarn quality. All models are still equipped with the reliable
and low-maintenance cop transport system SERVOdisc. The customer
saves energy here, as the conveyor belt is driven not
pneumatically, but by two electric motors.