Twisting, carpet yarn spinning and draw-twisting

Transcription

1 Twisting, carpet yarn spinning and draw-twisting NYLTEX and STEELTEX travellers and sinter metal rings

2 NYLTEX and STEELTEX travellers for twisting, draw-twisting and carpet yarn spinning Polyamid (NYLON) has a higher coefficient of friction than steel. This means NYLTEX and STEELTEX travellers can create with lower traveller weight sufficient yarn tension. STEELTEX travellers with metal insert for optimal wear resistance Advantages of NYLON travellers less load and wear on spinning rings higher speeds and longer traveller life easy inserting and removing of heavy travellers NYLTEX produced from recycle-free compounds Bräcker uses only fi rst grade compounds for the production of NYLTEX and STEELTEX travellers. The following two qualities are in use: Lubridur Fine structured compound for increased gliding properties This quality is in use for twists with normal abrasion tendency and for twisting and doubling of delicate yarns R reinforced Compound reinforced with glass fi bres The higher stiffness of this material prevents pull-off of the travellers at start (mainly with light travellers) The wear resistance against abrasive yarns is increased The extra hard metal insert in the yarn path features an outstanding wear resistance Prevention of fi lament damages Extended traveller life when twisting or doubling abrasive yarns or fi laments Guarantees perfect yarn quality over an extremely long traveller life Mainly used in carpet yarn spinning, draw-twisting and for expensive special yarns and fi laments For draw twisting see page 8 R reinforced

3 Ring- / traveller combinations The vertical HZ ring- / traveller combination with ring heights from 9.5 to 38.1 mm are applied Traveller types Ring quality for HZ rings Structure of sinter metal Sinter metal ring with individual holder CE Type Normal, low yarn path for fi ner to medium yarn counts CLE Type Increased, wide yarn path for medium, bulky and coarse counts The lubricated rings are manufactured from sinter metal. The porous structure of the sinter metal guarantees optimum distribution of the oil over the entire traveller running track. The oil fl ow to the surface is regulated by the ring temperature: With higher tension and hence higher friction, more oil is protruding to the surface with the effect that the friction reduces. This self-regulated system is widely accepted and sinter metal rings have replaced most of the solid metal rings. The HZ ring height depends on the yarn / twist count range Yarn / Twist count tex Traveller No range ISO HZ ring height HZ 9.5 3/8" HZ /32" HZ /16" HZ /32" HZ " HZ /2" recommended possible

4 Twisting Recommended traveller weights Yarn count Tex Nm Ne NYLTEX / STEELTEX ISO No* 2 ply 3 ply 4 ply 6 ply

5 Spinning Recommended traveller weights Tex Yarn count Nm NYLTEX / STEELTEX ISO No* * ISO No = Weight of travellers in g, respectively in mg per traveller The traveller weights shown in this table are recommendations. They depend on spinning geometry, ring lubrication and spindle, respectively traveller speed. The exact weight can only be determined through trials.

6 Delivery program for NYLTEX travellers HZ / 8'' CE - CER HZ / 8'' CLE - CLER HZ / 32'' CE - CER HZ / 32'' CLE - CLER HZ '' CE - CER HZ /2'' CER HZ /2'' CLE - CLER , ,

7 Delivery program for STEELTEX travellers HZ / 8'' HZ / 32'' HZ / 16'' HZ / 32'' HZ '' HZ '' US HZ / CLS CLS

8 Bräcker AG Obermattstrasse Pfäffi kon-zürich Switzerland Phone Fax Website: Draw twisting Draw twisting of filaments requires special treatment of the travellers yarn path. Through the high delivery speeds due to low twist, abrasion in the yarn path is increased. To prevent filament breaks, Bräcker recommends to use the following special travellers. CPH Chromit STEELTEX Mainly in use for the For coarser twists only fi ne to medium twists Inserting and removing tools for heavy HZ travellers Traveller pincers available for the following traveller/ring heights HZ /32" HZ " Wear resistant yarn passage through special chrome plating Traveller back and foot with BLT fi nish Express toe for gentle inserting on sinter metal rings STEELTEX travellers with extra hard steel inserts guarantee extended traveller operating time Traveller delivery program for draw twisting CPH travellers HZ ring height STEELTEX travellers ISO 12.5 to / 3/8" ISO 50 to 500 ISO 22.4 to / 13/32" ISO 112 to 315 ISO 20 to / 7/16" ISO 80 to 500 PR / Copyright by Bräcker / Subject to modifi cation without prior notice