YarnStar 3+

Excellent coated yarn quality.
Minimum space requirement.

Detail photo of a godet of a SAHM YarnStar 3+ coating machine
YarnStar 3+

Coating - Cooling - Winding+Automation

The YarnStar 3+ is a mono and bicolor single end yarn coating line designed for a high degree of flexibility and a broad application range.

The extremely compact line coats single ends of textile and technical yarns in excellent coated yarn quality. The integrated line concept of the YarnStar 3+ achieves production speeds up to 1,500 m/min.

Thumb pressing on a yellow spool to show how soft the spool ist wound
Fewer cross marks due to soft winding
cross section of a coated yarn showing exact core yarn centricity
Exact core yarn centricity
Detail photo of a bicolor fabric
Bicolor fabric
Complete process of a YarnStar 3+ coating line. Consisting of: Creel, extruder, cooling chamber, Automatic precision winding and bobbin change
Detail photo of unwinding creel
Unwinding creel for polyester feed packages
In continuous operation, the feed packages and the four reserve packages are spliced together. The yarn tension is controlled by a leaf spring brake
Detail photo of the die head of the extruder. Yarn is coming out of the die head.
Screw extruder with 5 heating zones
Feeding of the granulate is done by a material hopper. The material is transported from the feeding zone to the compression zone at the preset feed rate (rpm). Delivery volume and heating zones are monitored by a control unit. From there the material is fed to the metering zone and on into the die head. There the core yarn, e.g. polyester, is bonded to the material from the extruder, e.g. PVC.
Detail photo of a godet in the SAHM cooling chamber
Cooling chamber
After coating the material is cooled to remove the shrinkage remaining in it (relaxing). First it passes through a water bath, 1 meter in length. Then the material is stretched on several godets in the cooling chamber. The yarn tension is controlled precisely at the godets via frequency inverter. The cooling stretch traversed by the material in the cooling chamber totals 35 meters.
Detail photo of a full spool and an empty tube on an automatic SAHM Precision Cross Winder, type TWINSTAR II, showing the automatic bobbin change.
Automatic precision winding and bobbin change
Following the relaxing process, the material is wound in a fully automated process using a TWINSTAR II precision cross winder. Soft winding on the bobbins is achieved by precise yarn tension and optimized niproll pressure. Once the preset bobbin diameter or yarn length is reached, the bobbin is changed. The automatic handling system removes the finished package and fits the winder with a new paper tube.
The finished package is transported to a storage unit which is emptied from time to time by the operator.

Your advantages

Icon showing the 1st advantage of the YarnStar3+ coating machine: Fast amortization
Icon showing the 2nd advantage of a YarnStar 3+ coating machine: Excellent yarn quality
Icon showing the 3rd advantage of a YarnStar 3+ coating machine: Highest efficiency and productivity
Icon showing the 4th advantage of a YarnStar 3+ coating machine: Ideal basis for downstream process
Icon showing the 5th advantage of a YarnStar 3+ coating machine: Minimum space requirement
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