news - Changzhou Longfu Knitting Co., Ltd.

2023-04-25 [Circle] How to choose the "triangle" of the core parts of the circular knitting machine The triangle is one of the core parts of the circular knitting machine. Its main function is to control the movement and the movement of the knitting needles and the sinkers. It can be roughly divided into the full needle (circle) and the triangle (half the needle). Triangle, plain (float) triangle and sinker triangle. The overall quality of the triangle, will have a great impact on the circular knitting machine and fabric, so pay special attention to the following points in the purchase of the triangle: First of all, we must choose the corresponding triangular curve for different fabric and fabric requirements. As the designer pursues different fabric styles and focuses differently, the triangle face curve will be different. Secondly, because the knitting needle (or sinker) and the trigonometric sliding friction at high speeds for a long time, individual process points also have to withstand high-frequency impact, so the raw materials and heat treatment process used in the triangle are very important. Therefore, the triangular raw materials are generally selected national standard Cr12MoV (Taiwan standard / Japanese standard SKD11), the material hardenability, quenching deformation is small, quenched after the hardness, strength, toughness are more suitable for the requirements of the triangle. The quenching hardness of the triangle is generally HRC 63.5±1. Excessively high or low hardness of the triangle can have adverse effects.

2022-11-30 Variety of circular knitting machine by a large number of cloth clinch a deal Since the end of this month, all kinds of filament yarn knitted fabrics in China Textile City have been introduced more and more in stock. The overall sales volume has continued to expand. With the weakening of the summer heat, all kinds of filament knitting circular knitting machines mainly used for the autumn and winter clothing are mainly sold in China Textile City. The warp knitting fabrics, weft knitting fabrics and spot launches have started to increase. Scattered appeared, the sales volume of small batches of large batches in a few days, clothing filament yarn knitted single-layer fabric, double-layer composite fabrics, lined with auxiliary varieties such as the new growth. Among them, FDY118D Knitting Machine has been sold for sale in the season, with a small batch of swimsuit fabrics, which are still popular in the near future. There are many garment manufacturers and secondary goods to be added. A small number of major professional new FDY75D dresses knitted weft knitting "Bai Quan crepe" new popular, some of the printing counterparts began to increase transaction. DTY, FDY and POY cashmere inductive knitting machine, with a new flower pattern counterparts subscribe, and repeated in the batch. Suede apparel knit fabrics overall orders and delivery volume began to grow steadily, and apparel knitted warp knitted fabrics, weft knitted fabrics to become a new growth since late. In the early days of the next few days, the turnover of various types of knitted fabrics dominated by various types of filament apparel in China Textile City rose mainly, but the short-term increase was still modest.

2022-11-29 Knitting large circular knitting machine production of sweaters Sweater industry is a great potential for development of the industry. With the change of people's lifestyle and the pursuit of comfort and personalization, the prospect of sweater sales is good. As knitted sweaters processing industry is labor-intensive industries, relatively low labor resources so that China's exports of knitted sweaters in the price has a certain competitive advantage. Coupled with the improvement of domestic processing level, our country has become a veritable knit sweater exporter. In recent years, with the introduction of various foreign computerized flat knitting machines, sweaters processing enterprises produce unique sweaters products is no longer a problem. However, in the production and processing, due to the piece of clothing and sleeves with a mouth machine connected, and this completely rely on the car to stop workers at a glance to the needle, coupled with the market now on the high machine number of products pro-Lai, making this session Became the bottleneck of sweater processing enterprises. Therefore, to improve the production efficiency of sweaters and product quality and added value, strive for early access to the international wool knitwear in the high-end market, has always been the direction of the sweaters enterprises. Zhejiang Yuxi Knitting Co., Ltd. is a specialized manufacturer of all kinds of cotton, polyester-cotton and polyester-polyester products such as jersey, spandex jersey, cotton cloth and pearl cashmere. For the sweater industry status quo, the company produced a new fabric with good elasticity and soft, smooth, breathable, breathable and other characteristics. Through the use of raw materials, the organizational structure of the process design and finishing techniques and other means, the company produced a stretch sweater fabric series. This product has the similarities and differences with the ordinary sweater, and can be cut and formed by processing, which avoids the sleeve opening pro

2022-09-27 Dust removal accessories - dust removal skeleton and dust filter bag the most critical The biggest disadvantage of the bag filter is that it needs to replace the dust removal accessory - dust filter bag regularly. In the past, due to the small variety of filter materials in the dust removal system, poor quality, and insufficient technical clearance of the bag, the replacement cycle was short and continuously increased. The operation cost and maintenance workload are large, which brings inconvenience to users. Today, the variety and quality of filter materials in my country have improved. The technique of sewing bags has also improved a lot. The life of the filter bag is increased to more than two years, or even longer, to meet user requirements. Therefore, bag filters will develop rapidly in the next decade. In the 1950s, my country's bag filter was mainly used in the Soviet Union. In the 1960s and 1970s, some design and research institutions were imitating the pulsed mechanical rotary blowback flat bags in the United States, Japan and other countries. Dust collectors are mainly self-produced products. Current environmental protection standards require that the emission concentration must be lower than tens of milligrams per standard cubic meter. In terms of dust removal performance, there are generally only bag filter and electrostatic precipitator. sufficient. The electrostatic precipitator has a small pressure loss during operation, and is mostly used to collect excess air volume in industries such as electric power, steel, cement, and pulp. However, it has been replaced by bag filters in other high-volume applications. Due to the large amount of bag filter used, the requirements for dust removal accessories are becoming more and more strict. The quality of dust removal accessories directly affects the use of the entire dust collector. Keda Environmental Protection Co., Ltd. specializes in the production of dust collectors and supporting dust removal accessories to ensure the normal dust removal efficiency of the equipment.

2022-09-27 Production and Elimination of Stop Marks on Small Knitting Circular Machine The start-up of the circular knitting machine will leave a mark in the weft direction of the woven fabric. This type of trace differs depending on the type of fabric, the condition of the loom, etc. Generally, there will be a fine line of indentation, and the line of weaving between the weaving machine and the machine before and after the machine stops will be obvious; sometimes there will be wider traces and the loom. The difference between woven fabrics before and after the shutdown is not very obvious. After the fabric is dyed, there is a certain color difference between the position with the mark of the stop mark and the normal production of the fabric without shutdown. If the marks of the occurrence of the stop mark occur frequently and the degree is serious, the normal cutting and use of the fabric will be affected and waste will be formed. Causes of stop marks There are many reasons for the creation of a stop mark: 1. The abrupt change in the amount of yarn to be fed causes th

2022-09-26 [Circular Machine Column] The reason why some of the spandex breaks off after the dyeing of cotton and ammonia fabrics after weaving? This phenomenon generally occurs for three reasons. They are raw, woven and dyed. When the spandex phenomenon occurs after dyeing and finishing, the cloth sample should be disassembled and the damage of spandex should be carefully observed. If the cross section of the spandex yarn is zigzag, it means that the spandex yarn is damaged before dyeing and finishing, and the spandex breaks when the fabric is stressed during the dyeing and finishing process; if the span cross section of the spandex yarn is spherical, it is because the spandex yarn is dyed Time. There is a problem with the quality of the weld or the spandex itself. 1 Raw material problem Different spinning methods have different properties of spandex. For example, dry spinning spandex has good elongation and slightly poor recovery rate, while wet spinning spandex is the opposite, with poor elastic elongation but better response rate. Therefore, when using different brands of spandex yarn, we must first understand its characteristics, and then appropriately adjust the amount of spandex yarn during weaving to avoid the phenomenon of spandex breaking due to weaving. In addition, spandex is produced in different ways, and its structure is also different. Spandex looks like a single filament on the surface, but it is actually composed of multiple filaments. For example, Hyosung brand 4.4 tex (40 D) spandex consists of three monofilaments. If one of them is broken during weaving, it is not easy to find. This requires the worker to press the fabric hard on the opener and carefully check the fabric for small bright spots. If there is, there may be a spandex phenomenon. Spandex is very sensitive to temperature, low temperature will reduce the strength of spandex, especially in the north, the workshop should maintain a certain temperature, before using the spandex, put the spandex in a place with a higher temperature, open the carton package, and let the spandex warm up first. 2 Wea

2022-09-26 Several Factors of Dust Removal and Difficulty Removal of Dust Collector Dust collectors are difficult to remove and easy to stop. Why do we have such a problem? After all, we came to the conclusion that most of the problems were caused by not adequately considering the nature of dust prior to design. Blindly, in order to reduce equipment investment, high filtration speed was selected. To choose a good bag filter, we must correctly understand and understand the relationship between dust removal efficiency and filtration speed, cleaning performance, and filtration resistance. To know the bulk density or bulk density of the dust, that is, the weight per unit volume of dust. The unit volume includes the volume of the dust particles, the pores of the dust particles adsorbed on the surface of the dust particles, the air volume and the space between the dust particles. Knowing the bulk density of the dust and the characteristics of the bag filter is important for ventilation and dust removal because it is closely related to the dust removal performance of the dust. Chemical and physical properties of dust-laden gases, such as moisture content, temperature, chemical composition and properties. The determination of these parameters is directly and indirectly related to the selection of additional dust removal measures and the selection of filtering wind speed. Dusty gases, if any, contain chemicals such as chlorides, which are often 'hygroscopic'. If no extra measures are taken, the dust bag may become "stuffed". Dust particle size distribution. The particle size of dust is its basic characteristic. It is a composition consisting of particles of various sizes. Characterizing these aggregates by their average particle size alone is not sufficient. Dust sticky. Viscosity is the mutual attraction between dust or dust and molecules on the surface of an object. The effect of viscosity is even more pronounced on baghouses, as dust collection efficiency and filtration resistance are largely de

2022-09-26 Knitting circular knitting machine Reasonable and advanced operation methods are an important prerequisite for improving knitting production efficiency and ensuring product quality. first shift The handover work of operators is to establish a normal production order, ensure the smooth progress of production, and ensure the quality of products is an important part of the process. Communicate information, clarify responsibilities, and watch together. 1. Requirements for shift operators: (1) The workplace should be kept clean, and the spare yarn on all equipment should be controlled within the specified range; (2) explain the operation of the equipment; (3) Explain the changes of fabrics, change the color of varieties, and exchange raw materials; (4) Fill in the grey cloth record card: item number, size, date, work number, origin of raw materials, batch number, weight. 2. Requirements for shift workers: (1) Entering the job position at the specified time and making preparations for succession; (2) Take the initiative to learn more about work production, equipment operation, process changes, variety changes and related matters; (3) Carefully and meticulously check the operating status of the machine, and stop the inspection of the sub-station layout; (4) Check whether there is any error in the origin or density of the raw material, whether the spool is wrong, whether the spool is skewed, whether there is oil, etc. (5) Make a transfer record on the cloth.

2022-09-26 Talking about the processing technology of disc-shaped precision gear parts Figure 1 Disc part drawing The disc-shaped parts have a large ratio of the length to the diameter of the parts, and the insufficient thickness of the parts results in poor rigidity and poor processingmanship. When machining parts, under the influence of cutting force, clamping force, cutting vibration and other factors, it is easy to process and deform, and the accuracy cannot be guaranteed. Parts characteristics and processing difficulties The disc gear parts are shown in Figure 1. The parts are titanium alloy TC4-R, the outer diameter of the parts is φ201 mm, and the total thickness of the parts is 9 mm. The surface of both ends of the part is respectively designed with a relief groove, one surface is uniformly provided with six fan-shaped relief grooves, and the other surface has two annular relief grooves, and the thickness of the middle portion of the part becomes 3 mm. The number of gear teeth is 400, the modulus is 0.5mm, and the gear accuracy grade is 6. This part has a length to diameter ratio of 1:67 and is a thin-walled part with the following characteristics: (1) The wall thickness of the part is insufficient and the rigidity is poor. Under the action of clamping force or cutting force, the thickness of the part is not enough to resist the clamping force, and it is easy to deform, and the dimensional accuracy, shape and position accuracy, and gear precision cannot be achieved. (2)