1. domestic jacquard development direction with the development of international electronics, machinery industry and the development and application of new raw materials in the textile industry, the world in recent years the development of jacquard machine speed, China to keep up with the speed of development as soon as possible, the author believes that the domestic jacquard machine should focus on the following aspects to improve: with the continuous improvement of living standards, people's requirements for the living environment will also be higher and higher, the future environment decoration, home beautification, and clothing materials, etc. will gradually from plain fabrics to flower fabrics. Home beautification, as well as clothing materials, etc. will gradually from plain fabric to flower fabric over, and therefore the proportion of jacquard fabric is bound to increase. 2.

2. due to electronic, mechanical industry leaps and bounds, electronic jacquard, weaving programming system can be gradually promoted, in order to multiply the efficiency.

3. In order to improve the level of product automation and adapt to the new weaving machine high-speed operation requirements, should proceed to the domestic jacquard machine towards advanced, electronic, high-speed development. At present, the domestic only to adapt to the following 300r / min mechanical jacquard machine, and the use of wood grain paper design, punching, turning to change a complex pattern fabric takes nearly a month, whether from the quality or efficiency, can not adapt to the needs of the market, through the above analysis of the performance of foreign electronic jacquard machine, it can be seen that the advantages of high-speed electronic jacquard machine is: First, the car speed is high, can adapt to 250 of a variety of rapier The second is the use of independent pattern design system, centralized control of the shop floor electronic jacquard machine pattern organization changes, and from the international textile machinery exhibition in past years, equipped with high-speed electronic jacquard machine prototype almost accounted for 60 % of all weaving machines and our country in this field is still blank. According to forecasts, the domestic textile user demand for the machine will grow at an annual rate of 30%. The current domestic production rapier, air jet, water jet loom has formed a batch production capacity of 1.7 million units / year. With the most conservative forecast, equipped with high-speed electronic jacquard machine by 3 %, there should be 500 units / year of market demand. Therefore, the research direction on the high-speed electronic Jacquard machine, will be conducive to improving the manufacturing level of China's electronic Jacquard machine, to produce the top to save foreign exchange.

4. in order to facilitate the development of new products and competition, should gradually make the domestic production enterprises by the miniaturization of the group, integrated direction, so that the product from a single direction to diversification, and gradually establish a multi-specialized production base of loom opening.

Throughout the foreign high-speed electronic jacquard machine manufacturers continue to pursue, the results of continuous innovation, in order to keep pace with the times, we must have their own innovative products. Therefore the introduction of foreign advanced technology, the development of domestic high-speed electronic Jacquard machine is imperative 丨 cotton spinning equipment to spinning fancy yarn production practice Duan Tailun Wang Xiujie (Chongqing Sixth Cotton Spinning Factory) to fancy yarn fabric, foreign economically developed countries have a greater demand, the domestic demand is relatively small, this demand reflects the level of people's purchasing power and the contradiction between the cost of manufacturing fancy yarn, and people on the fancy yarn fabric This demand reflects the contradiction between the level of people's purchasing power and the manufacturing cost of fancy yarn, and people's awareness of fancy yarn fabrics. Efforts to reduce the manufacturing cost of fancy yarns and develop inexpensive and novel fancy yarns have become the key to develop the international and domestic markets of fancy yarns and their fabrics. Purchase fancy twisting machine, the price of each unit in tens of thousands to more than 100,000, and only 25 spindles, accounting for about half of the area of the spinning machine, high investment in equipment, and the number of operating spindles, high operating costs. With ordinary spinning machine to convert a fancy twisting machine, the price is less than a thousand dollars, each 416 spindles, can be used as 7 ~ 8 regular fancy twisting machine, when not spinning fancy line, as long as part of the parts to restore, you can spin ordinary yarn. The disadvantage is that some fancy yarn spinning with modified fancy twisting machine needs two twists to complete, while hollow spindle flower twisting machine can be twisted into once.

First, with cotton spinning equipment to change the fancy twisting machine, fancy yarn structure determines its process design requirements, process design requirements will determine the direction of its equipment transformation of the current fancy yarn structure can be divided into two categories: the first category, mainly single and double stranded yarn, characterized by regular or irregular length of the yarn with thick knots or knots, such as knotted yarn, snowflake yarn, corrugated yarn, filament bamboo yarn, staple bamboo yarn etc.; every second category, mainly made of three or more strands of yarn twisted together, is characterized by the appearance of yarn in the form of coils or spirals, such as beads and circles, circles, wreaths, pigtails, spiral flower threads, pearl threads, etc.

General cotton spinning mills can spin various lengths of bamboo fancy yarn on modified card, roving machine and spinning machine. Loop fancy yarn and spiral fancy yarn must be transformed into fancy twisting machine spinning through the spinning machine. From the point of view of scale efficiency and spinning quality, the spinning machine converted into a twisting machine, more spindles, high output, and spinning after the flower is not easy to deformation.

Here we mainly introduce the conversion of fancy yarn equipment by the spinning machine a few practices.

The first type of fancy yarn that knotted line, bamboo line. It is twisted by two different yarns, the first process, spinning knotted yarn, bamboo yarn; the second process will be knotted yarn or bamboo yarn and its matching ordinary yarn twisting, that is, the formation of knotted yarn or bamboo yarn.

The second type of fancy yarn is loop yarn and spiral yarn. It is composed of three or more yarns and the fancy structure is divided into three parts. The first part is the core yarn, which is the foundation and skeleton of the entire fancy line, and is in the center of the fancy line; the second part is the decorative yarn, which is a part of the fancy line, and it is regularly wrapped around the core yarn axis according to the process requirements, and the regularity of the decorative yarn wrapping directly affects the fancy effect of the fancy line; the third part is the binding yarn, which is the solid yarn, and is wrapped outside the decorative yarn, mainly to fix the fancy, strengthen the fancy effect, and increase the fancy line The third part is the binding yarn, which is wrapped around the outside of the trim yarn. In the first process, the decorative yarn and the core yarn are twisted into a fancy yarn by a fancy twisting machine according to certain rules; in the second process, the fancy yarn is twisted with the restraining yarn by a common twisting machine, which forms a fancy twisted yarn, commonly known as the second fancy yarn in production.

Fancy twist yarn structure characteristics determine its spinning process, in the transformation of spinning equipment, focusing on the drafting part, winding forming and tension control device for the transformation of three parts.

The transformation of the drafting part of the spinning machine A513MA has three rows of front, middle and rear rollers, the rocking frame is pressurized, and the yarn fed from the rear roller is output by the middle and front rollers in turn. For different fancy yarns, there are several transformation programs as follows.

Spinning knotted yarn equipment transformation knotted yarn is in the single yarn regularly formed thicker than the original yarn more than three times the coarse nodes, coarse yarn feeding, fine yarn output, available A513C car modified, through the electrical device control, so that the front roller regular intermittent rotation, the drawing front area will be regular beater surging whiskers, the output of the front roller of the single yarn will present a knotted yarn. In order to make the bearded strip in the upper roller output is not blocked, in order to affect the smooth formation of the bearded strip, the upper roller can make about 1mm slip groove.

Spinning bamboo yarn equipment transformation bamboo yarn is in a single yarn on the regular formation of thicker than the original yarn about twice the bamboo knot, using coarse yarn feeding, fine yarn output, the main transformation is in the front upper roller axial grinding about 1mm plane so that it has a concave and convex surface, the bar reaches the front roller, the grip point of the grip force size is regular change, and thus produce unstable stretch, into a yarn knot thick knot fine formation of bamboo yarn.

Spinning loop yarn, spiral line equipment transformation loop yarn, spiral yarn feeding part of a single yarn, the output for the loop yarn, spiral yarn, no matter how many yarns fed from the back roller, if the same speed from the front roller output, and evenly twisted together, which obviously can not form a pattern, to spin a fancy yarn, must be in the front of the upper roller jaws at the same time output more than two different speeds of yarn, so that the speed of the yarn according to The faster yarn is wound regularly around the slower yarn to form the fancy yarn according to the certain pattern requirements. We remove the back roller (so as to use this position as a yarn guide) and use the speed difference between the front and middle roller to form the pattern.

When spinning fancy yarn, in the middle and front upper roller cut out a groove, decorative yarn through the groove of the upper roller, held by the front skin roller roller, the front roller speed output jaw, core yarn through the front upper roller groove, held by the middle skin roller, with the middle roller speed output front roller jaw, two different yarn speed at the same time output front roller jaw, you can get a certain pattern of fancy yarn according to the design, the speed ratio is different The pattern is different.

The winding and forming part of the transformation A513MA winding change by the lifting gear B / B, the adjustment to carry out, ZK)/Z to adjust the forming cam speed or steel collar plate once lifting time, directly affect the size of the winding circle distance H. When the number of spun yarn changes, the pair of gear Zh*/Z can not be arbitrarily selected. According to A513MA product design formula according to the yarn diameter 4 times selected winding pitch, that is, yarn diameter A = 1/4XH (2) when the steel collar diameter of 45mm, tube yarn diameter D = 42mm, tube diameter d = 18mm, tube yarn forming angle a / 2 = 14 * 37 ', the above known conditions and formula (2) into the formula (1): Z10 / Z11 3 ~ 21 between Variable when the yarn diameter is. 6 ~ .8ytex, the average value is even if the drafting part of 2.5 modulus gear used in lifting, that is, Z10/Z11 for 71/23 when (23 teeth for the smaller gear, and then smaller may only be able to spin 204tex (about 5 metric counts) or more fancy yarn. Therefore, it is necessary to improve the winding section for spinning fancy yarns of 5 counts or less. So, we transformed the A512MA lifting gear and the transmission of the lifting section is shown.

We will card machine sprocket inner hole set after the lift wheel for spinning machine, when the passive sprocket from 20 teeth to 15 teeth, sprocket transmission ratio from the original 20/20 to 20 eight 5, that is, 1. 33 times, the number of yarn number is 204X1.33 = 271tex. and so on, change the lift sprocket transmission ratio, can fully meet the needs of more than 500tex fancy line.

The tension control device can be set for knotted yarn and bamboo yarn without changing the original tension rod device, while the loop yarn and spiral yarn are fed with more than two single yarns, so the tension control should be strengthened. Tension control is an indispensable condition for spinning fancy yarns, and the pattern change rule and size are largely determined by the tension adjustment device. The adjustment of yarn tension in the twisting triangle should be controlled by speed and twist according to the requirements of the pattern. The control of yarn tension in the input roller is done by the yarn guiding device. We have added two yarn guide rods to the original one to control the tension of core yarn and trim yarn into the roller by controlling the winding angle.

Second, the production control of fancy yarn is directly related to whether the production can be carried out normally and whether the yarn is up to the quality standard. The knotted yarn and bamboo yarn are adjusted mainly by twist under certain conditions of raw materials. The twist is determined by the number of knotless or thick knotted parts. Loop yarn and spiral yarn mainly control the single yarn strength of core yarn and solid yarn, while mastering the twist and pattern.

The pattern control of fancy yarn is controlled by the following three aspects: front and back drafting distribution, the back zone drafting is generally controlled between 1.3 ~ 1.8 times. The fiber is short and the yarn count is high, and it is mastered on the small side, and vice versa on the large side.

The number of stops per unit time of the front roller can be adjusted to produce different numbers of knots per unit length of yarn.

The proportion of stopping time per unit time of front roller, when the number of stopping times per unit time is certain, adjusting the proportion of stopping time per unit within a certain range can get different diameters of knots. Longer stopping time results in larger knots, and vice versa in smaller knots.

Bamboo knot yarn controls the thickness of bamboo knots by the ratio between the axial concavity and convexity of the front skin roller. The bamboo knot is thicker if the arc of grinding away is large, and vice versa the bamboo knot is not obvious. However, excessive breakage increases.

Loop thread, spiral thread is regulated by the twist degree during fancy twisting and the speed ratio between trim yarn and core yarn. The twist degree determines the thinness of the pattern, and the speed ratio determines the size of the loop, with different speed ratios forming different patterns. The speed ratio of looped fancy yarn is generally 1.5~2.5, and the speed ratio of spiral yarn is generally 1.05. The quantitative adjustment of knotted yarn and bamboo knotted yarn is regulated by the draft multiple of fine yarn and the thickness of knot or bamboo knot. The first step is to make sure that the knot size or bamboo knot thickness is stable at 95% or more, i.e. to determine the stopping time of the front roller or the axial wear of the front rollers, and then to adjust the draft multiplier.

The loop yarn and spiral yarn are adjusted by the speed ratio between trim yarn and core yarn during fancy twisting. If the speed ratio is high, the weight is heavy and vice versa.

The operation and management of fancy yarns are generally the same as those of fine yarns and twisted yarns, but special attention should be paid to the following points.

In daily production, the line speed of the front roller output of twisting a flower process should be controlled at about 7~10m/min. The duty car worker should strengthen the tour, find the yarn running out of the running track should be corrected in time, and notify the machine repair oiler to check the cause.

The speed should be adjusted to about 200m/min. The jointing method should be determined according to the type of fancy yarn, generally using the staggered butt method, not allowing the jointing of small and large heads and slippery heads.

Second flower yarn spinning, winding line speed can be 20 30% higher than a flower yarn, but the joint should still be staggered butt.

The above is our exploration and experience in producing fancy yarn on cotton spinning equipment. Our factory has mass-produced hundreds of tons of various fancy yarns, which has brought good economic benefits to our factory. Through the production practice of converting fancy twisted yarn on cotton spinning equipment, we have made a new breakthrough in our understanding. It is simple, feasible and economical, and it plays a role in promoting the technical transformation and product combination of the enterprise. It puts the cotton mill in a favorable position in the product competition, and makes us step up to a new level in the activity of "guiding consumption and creating customers".