During the operation of the Eugen yarn puffing machine, special attention should be paid to the adaptability of raw materials, process parameter control, equipment maintenance, and safe operation. Specific precautions are as follows:
1. Management of raw material adaptability
Quality control of raw silk
Strictly screen the raw silk, avoid using POY (pre oriented yarn) containing wool, dirty yarn, or poorly formed yarn, otherwise it may cause processing interruption or insufficient elasticity. Fine denier organza (≤ 50 denier) should use raw materials with low impurity content (≤ 0.1%) to reduce the risk of fiber breakage; Coarse denier organza (≥ 50 denier) may have a slightly relaxed impurity content requirement, but it requires strengthened pretreatment.
Spinning and tension control
Fine yarn requires precise control of tension (± 0.1g) to avoid excessive stretching leading to yarn breakage;
; Coarse yarn requires stable tension (such as 5-8cN) to ensure uniform elasticity.The spacing between the yarn cutters needs to be adjusted according to the fiber fineness: the spacing between fine denier yarns (≤ 1.0dtex) is set to 0.1-0.15mm, and the spacing between coarse denier yarns can be relaxed to 0.2-0.3mm.
2. Process parameter control
Stretching and false twisting parameters
Stretching ratio: Fine denier organza (≤ 200 denier) is stretched 1.2-1.8 times, and coarse denier organza (≥ 200 denier) is stretched 1.8-2.5 times to ensure sufficient fiber deformation.
.False Twister Speed: Increase the false twist speed to 70000-80000r/min, enhance the twist of the fiber bundle (2000-3000 twists/m), and improve the elastic recovery rate (≥ 80%).
.D/Y ratio: Depending on the material of the friction disc, for example, a 9mm thick PU disc is recommended to have a D/Y ratio of 1.60 to balance stretching and false twisting effects.
.Temperature control
Setting temperature: Fine yarn is set at low temperatures (85-95 ℃) to avoid thermal damage;
; Coarse yarn needs to be shaped at high temperatures (90-105 ℃) to ensure elastic stability.Hot box temperature: The first hot box temperature is set to 180 ℃, and the second hot box temperature is set to 160 ℃, matching the deformation requirements of different specifications of organza.
.Speed Matching
The processing speed needs to be adjusted according to the fiber fineness: it is recommended to use 300-350r/min for fine yarn and 350-400r/min for coarse yarn to reduce tensile damage.
.III. Equipment Maintenance and Inspection
Daily Cleaning
Daily cleaning of the weaving mechanism, velvet knife group, and wire guide to prevent fiber residue from blocking the wire path.
. Calibrate the tension sensor (fluctuation ≤ ± 4%) and electronic needle selection system weekly to ensure parameter accuracy.Maintenance of key components
Bearings and transmission components: Check the running status of bearings every month, replace and add special lubricating grease when they are severely worn;
; Tighten the loose parts of the transmission components and adjust the belt tension. False Twister and Friction Disc: Regularly clean the oil stains on the surface of the friction disc, replace worn parts, and ensure the false twisting effect.Hot box and cooling plate: Check the heating elements and cooling system to ensure temperature uniformity and avoid local overheating or insufficient cooling.
.Thread inspection
Thread inspection should be carried out after work, before yarn shedding, after hair production, and before leaving work, with a focus on checking the roller, wire transfer device, tension sensor, and other parts to promptly correct thread deviation.
.IV. Safety Operation Regulations
Personal Protection
It is forbidden to wear jewelry, watches, etc. during operation to avoid scratching the wire bundle or getting caught in rotating parts.
. When removing the yarn, wait for the tube to stop rotating before taking it off to prevent hand injuries.Equipment safety
It is strictly prohibited to pass the suction gun under the leather roller or leather ring to avoid sparks from grinding with the steel roller.
. When dropping the tube, the wire sensor switch must be turned off first to prevent the wire from being cut off. Regularly inspect the electrical system to ensure good grounding of the distribution box and control instruments, and avoid the risk of electric shock. Emergency ResponseWhen a broken wire is found, priority should be given to investigating the cause (such as incomplete knotting, defects in the original wire, or equipment failure) rather than immediately starting the head.
. When the equipment malfunctions, non professionals are prohibited from disassembling it and should promptly contact the manufacturer for repair.