Compact Spinning System

Introduction of Compact Spinning System Compact spinning is a new spinning technique to be coupled with the conventional ring spinning machine, to produce condensed high quality yarn. To reduce / eliminate the spinning triangle at the front roller ( a known phenomenon in conventional ring spinning that leads to multitude of deficiencies, e.g. hairiness, end breaks, etc.) , a compacting device is added to control and condense the strand of fibre coming out of the drafting zone. This helps to reduce hairiness and increase yarn quality greatly. Based on market requirements in China, and compact spinning technologies used overseas, Kaigong has developed two new types of compact spinning systems for different customers to choose. With its advanced technology, good quality, low cost, easy and quick conversion for any ring frames, this facilitates decisions for large scale expansion or conversion of new plant. Structures of compact spinning system Keeping the original machine frame structure unchanged, and utilizing the old bottom rollers, pendulum arm, and drafting system, the new compact spinning device can be easily installed. For pneumatic compacting, only simple flexible pipes needed to be connected onto the negative pressure chamber sitting on top of the original pneumafil suction duct. There is no need to mount complicated suction pipes, and is, simple and neat. For pneumatic compacting, the negative pressure fan drive is collectively driven. It is structurally simple and easy to install. The main suction motor is fixed on the ground by 4 expansion screws, while the small fans and transmission parts are mounted on the original machine frames. The electrical control panels need no further changes. Just connect the wiring, as indicated in the wiring diagram provided, to the original electric circuit. Electrical circuitry is simple with minimal alterations needed. There are different sizes of condensing troughs for compacting different types of yarns, according to customers? end uses. Virtues of KAIGONG Compact Spinning System As compared with conventional ring spun yarn, compact yarn is characterized by significantly higher quality, with lower hairiness. It greatly reduces those protruding yarn hairs of over 3mm length, hence giving higher single yarn strength, higher yarn elongation, and higher wear resistance. Yarn strength can be improved by 5 to 10% . The evenness CV% , and yarn imperfections of compact yarn are all better than conventional ring spun yarn. Due to better wear resistance, its merit is even more enhanced after cone winding. The bulkiness of compact yarn is 1/ 3 lower than conventional ring spun yarn. It is leaner and with better luster, making it an ideal yarn for high-end fabric manufacture. Due to elimination / reduction of spinning triangle, less fly is generated during spinning. Amount of cotton fly in the production area can be reduced by 85% , giving a better ambient production environment. End breakage rate is 30 ? 60 % lower than conventional ring spinning. Due to higher yarn strength, less twist level can be used in the yarn, to give higher yarn production rate. Also, single yarn can be used to replace ply yarn, and carded yarn used instead of combed yarn, hence improving production productivity. Better dyeing and printing effect can be achieved when using compact yarns due to lower hairiness, and better fibre alignment. Also, lower twist level contributes to higher quality of fabric in the form of softer handle, better draping property, and better wear comfort. As the quality of compact yarn is higher, it can command a price premium of about 20-30% in selling of yarns. Also, less spinning fly reduces raw material consumption, and cost of production, leading to more economical production. Negative pressure compact spinning system This compacting device is made up of 1) suction pipe with skewed oval shape x-section, 2) a perforated nylon woven apron, and 3) an additional top delivery roller arrangement. The specially shaped suction pipe is always under negative pressure condition, with an open slit on its top surface facing the fibre path.? The length of this slit must correlate with the contact distance between the fibre strand and the delivery apron. The slit is also slanted laterally.? The perforated apron is slotted on the outside of the suction pipe, and revolves with the top delivery roller, under friction drive.? This top delivery roller is in turn driven by the top front roller through small gears. When the strand of fibre starts to leave the front roller nip, it is immediately laid on the perforated apron, and is brought under vacuum suction, by the open narrow slot, until it reaches the delivery roller nip point.? Under negative pressure, all the fibres in the slot zone will be condensed towards the axis of the yarn.? The cot diameter of the top delivery roller is slightly bigger than that of the top front roller, to create an axial-wise tension on the fibre strand.? This facilitates the straightening of the hooked fibres, and ensures compacting effect in the suction zone. In compact spinning, individual fibres in the strand are twisted under virtually parallel condition; hence all fibre length and its tenacity are being incorporated into the yarn proper.? As the fibre strand out of the front roller nip is constantly under negative pressure control, and compacted, spinning triangle is no more in existence.? As there is also some rolling effect of the fibres, hence effect of condensing is enhanced, with leaner strand delivered.  ? ' ?  ?  ? ' ?  ? Magnetic Compact Spinning System Such installation is simple in structure, easy to operate and maintain, consumes no extra energy, and produces good quality yarn. Mechanical operation principle is used instead of using negative pressure.? The compacting device is comprised of: A top pressure roller at the back, a compacting condenser in the middle, and a delivery top roller at the front, the condenser is secured in its position by the top positioning flat spring bar, and a permanent magnet rod ensures the condenser to sit on the bottom front roller, all secured and supported by levers, screws and nuts. Working Principle? When the pendulum arm applies pressure on the drafting rollers, the delivery top roller also receives pressure, through the flat spring, to deliver the fibre strand for twisting.? As this extra delivery top roller is more slanted forward, as compared with usual front roller, it moves the nip point for twisting also forward. This also creates a bigger gap between these two top rollers, enabling a condenser to be fitted for compacting purpose. With the aid of the permanent magnet rod, the condenser is attracted and rest on the bottom front roller.? When this bottom roller rotates, the condenser will tend to move in step, but is arrested by the delivery top roller in front, creating relative frictional motion between the two contact surfaces.? It is relatively fixed in position circumferentially to the bottom roller, but has slight freedom to move laterally.? As there is no clearance between the condenser and the bottom roller, this creates a semi-enclosed tunnel between the trough in the condenser and the bottom roller, thus providing a working area for compacting. When the bottom roller rotates, it will deliver the drafted roving with some air current, generated by the grooving surface of the bottom roller, into the semi-enclosed trough tunnel.? As the trough is specially profiled, wider at inlet and narrower at outlet, the moving drafted fibre strand will be streamlined towards the centre of the fibre path, hence compacting of all fibres around the axis of the yarn can be carried out.? As compacting happens after drafting is done, it has no effect on the evenness of the yarn. It only helps to realign all the leading and trailing ends of the fibres, to narrow the width of fibre strand, to bring closer ( compacting) all the fibres, and to deliver at the front roller nip point a much smaller spinning triangle.? This contributes to the reduction of hairiness, hence realizing compact spinning. MESINDON ( MAINTENANCE SERVICE & PENJUALAN MESIN INDUSTRI) Hubungi 0815 614 1954, 0811 893 101 Jakarta - Indonesia