What is the process flow of processing POY yarn into DTY yarn by texturing machine?
POY raw yarn – wire cutter – first roller – threading rod – twist stopper – deformation hot box – cooling plate – false twister – second roller – shaping hot box – ( Network mouth) – third roller – oiling roller – winding roller – winding – grading inspection – packaging and storage
1 Raw yarn creel
Generally placed on both sides of the host, mostly door-type brackets. The main function is to place raw silk bobbins. Generally, two silk bobbins are placed at each spindle position, one of which is in use and the other is for backup. At the same time, a wire guide tube is also installed on the wire rack to guide the wire strips to the feed rollers respectively.
2 The first roller (feeding roller)
There are two types of feed rollers: apron type and top roller type. In the apron type, the contact surface between the apron and the driving roller is large, which can reduce the wear of the driving roller bearing. Slow reciprocating wire transferers are installed at the entrances of the upper, middle and lower wire feeding devices. The top roller feed roller is wear-resistant, but its holding power is insufficient. This can be compensated by winding the roller a few more times.
3 head rod
Each spindle position has a threading rod. When threading, pull down the threading rod and pass the thread around the yarn guide on the top of the threading rod. After reset, the thread will automatically be guided into the groove of the heating plate of the hot box.
4 twist stopper
The twist stopper is installed on the top of the threading rod. Its function is to prevent the yarn twist from transmitting outward from the hot box and reduce the twisting tension to ensure the elasticity and strength performance of DTY.
5 first heater
The first heater is generally an arc-shaped hot plate with grooves. The high-speed traveling wire bundle passes through the grooves. In order to avoid and reduce the wear of the wires on the surface of the hot plate and the chemical corrosion of the oil, the surface of the grooves is chrome plated or Sprayed with ceramic, the surface of the groove has a fairly smooth finish to avoid damaging the filament. The geometry of the groove is related to the stability of the filament in the groove when running at high speed. If the contact surface between the groove and the filament is relatively flat, the filament will easily slide to both sides when running at high speed, causing uneven heating of the filament. The quality is reduced, so the groove shape is generally designed into a V-shape.
In actual production, we must frequently check the wire path of the hot box and clean it every 2-3 months. Because the temperature of a hot box directly affects the crimping and bulking properties of the yarn. This in turn affects the dyeing performance. Therefore, the more the yarn deviates from the hot box yarn path during production, the worse the deformed yarn will be and the lower the dyeing grade will be. If most or all of the yarn runs out of the silk path, the finished yarn will become stiff.
6 cooling plates
The temperature of the filament after passing through the first hot box is relatively high. In order to make the filament have sufficient rigidity and allow the twisting process to proceed normally, the filament must be cooled to 80°C through the cooling plate. The length of the cooling plate is generally about 1.5M.
7 false twister
False twisters are divided into two types: stacked disc type and apron type. The stacked disc type false twister consists of three sets of friction discs (driving wheel, auxiliary wheel, pressing wheel) with the same speed, which are directly driven by the high-speed rotating friction surface. The tows are twisted. The apron-type false twister consists of a pair of aprons that maintain stable contact, and twists the silk strip through the movement of the apron. The function of the false twister is to generate mechanical twisting stress for deformation processing. It is the heart of the texturing machine.
8 second roller (middle roller)
The middle roller is very important, usually its speed is the so-called vehicle speed. It is required that its apron frame has strong holding power to prevent the yarn from escaping and twisting.
9 Second heater
The second hot box commonly uses non-contact heating tubes, which heat the filaments with the help of thermal radiation from the tube wall. Due to the influence of air flow, static electricity and tension, the filaments sway in the heat pipe, so in fact the filament bundles sometimes come into contact with the tube wall, so Also called semi-contact heating form. Usually, the heat pipe diameter is 3-4CM, and the stainless steel pipe with good inner wall finish is used. There are two forms of heating and electric heating.
The temperature of the second hot box increases, and the crimp rate (elasticity) of the finished fiber decreases. Boiling water shrinkage is reduced, dimensional stability is improved, and the residual torque of the filament becomes smaller.
10 third roller
The requirements for holding the apron are relatively high, but lower than those of W2 and W1. Its function is to form OF2 (ie, shaping overfeed) for shaping in a relatively relaxed state, eliminating most of the internal stress in deformation, so that the bulkiness is moderate, the elasticity is moderate, the boiling water is normal, and the dimensional stability is good.
11 tankers
The main function of the oil tanker is to add appropriate oil to the low elasticity yarn. Its function is to improve the bundleability of the fiber, increase the smoothness of the fiber, improve the antistatic property of the fiber, and adapt to the requirements of subsequent weaving.
12 wire detector, wire cutter
The wire detector in the texturing machine is also called a broken wire detector or sensor. It automatically cooperates with the wire cutter (also called a wire cutter). When the wire breaks during operation, the wire detector It senses and then triggers the action of the wire cutter with an electrical signal to cut off the wire at the broken spindle before feeding the roller to prevent the wire from getting entangled on the roller.
13 silk suction device
The function of the fiber suction device of the texturing machine is to help with head lifting, bobbin doffing and wire stripping.
14 Smoking devices
The oil evaporated when the fiber is heated and set will pollute the air, worsen the operating environment, and affect the health of workers, so it isSmoking ports are installed at the entrance and exit of the first hot box, and the volatile oil fumes and heat are discharged to the outside through the exhaust fan, and part of the oil fume condensate flows into the oil collection barrel under the fan.
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