Single end extrusion coating line

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 extrusion 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

Exact core yarn centricity

Bicolor fabric

Complete process of a YarnStar 3+ coating line. Consisting of: Creel, extruder, cooling chamber, Automatic precision winding and bobbin change

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

Chill unit

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 chill unit. The yarn tension is controlled precisely at the godets via frequency inverter. The cooling stretch traversed by the material in the chill unit 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

Brochure