1. The characteristics of chemical fiber products require the traditional carding process to use the same carding process and carding elements as cotton spinning to card chemical fibers, and the following problems will occur. Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame.
Special equipment for the textile industry on the winder. As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field. Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery.
According to the spinning process, carding is an important process. The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process). (1) The friction between the chemical fiber and the carding element will generate static electricity, which is not easy to conduct. Therefore, the chemical fiber is easily adsorbed on the carding element, resulting in the winding drum, the doffer, and the pin teeth of the cover plate.
(2) Chemical fiber, especially synthetic fiber, has good resilience and fluffy sliver, and it is not easy to block the channel through the bell mouth and the coiled inclined tube. Therefore, curved inclined tubes are often used when spinning chemical fibers. (3) The moisture regain of chemical fibers is different. Viscose fibers are larger than cotton, and synthetic fibers can be greatly increased than cotton. The friction coefficient between the development of synthetic fibers is small, and the friction correlation coefficient with Chinese metals is large, so we are easy to Lead to the production of sliver hair, cotton net broken edge.
(4) Long fibers, especially fiber length, if properly trimmed during the process, it may damage the fibers, and the fibers transfer disease. (5) Chemical fiber enterprises generally only contain a small amount of rented hard filaments, doubled filaments, rubber blocks and ultra-long fibers, with good length uniformity and very little short-staple content. Therefore, the development of the students' usual cotton spinning production process will easily cause excessive waste and loss of cotton.
Therefore, in order to obtain a good effect of carding teaching, when processing chemical fibers, the company should select carding elements appropriately according to the technological characteristics of chemical fibers, and appropriately adjust the carding process. 2. Selection of Carding Elements The selection of carding elements of the carding machine is very important. Carding synthetic fibers must be carded with chemical fiber metal clothing or general cotton and chemical fiber clothing.
The selection of spinning chemical fiber metal card clothing should be based on the chemical fiber not entangled in the cylinder, less sliver neps, and good mesh clarity. The coefficient of friction between synthetic fibers and metal needle teeth is large, and it is difficult for floating fibers to enter the teeth. Therefore, the working angle of chemical fibers and needle cylinders should be appropriately increased. The tooth depth is easy to understand, and the tooth density is appropriate. return. Such“wide angle”,“shallow teeth”,“reverse arc”Tooth needle cylinder, enhance the ability of release and transfer of fiber, chemical fiber can effectively prevent the winding cylinder, fiber and promote transfer to the doffer.
Huaer clothing should be matched with the choice of Xinjinlong clothing. The doffer transfer rate is appropriately larger, which is beneficial to reduce the working area and reduce the load on the surface of the needle cover of the neps. For this reason, the use of a metal drum and a laundry doffer to work both needles to remove spun cotton is large, and the angle between the teeth is different in order to facilitate the increased transfer rate of the spun fibers.
The density of the needle teeth of the flat card clothing is diluted, the diameter of the carding is slightly rough, and some high-short needles are suitable for the high carding yield strength requirements. General licker-in blade 800*4.5 teeth is selected/25.4mm specification is better. Especially thin blades, strong carding and ability to be punctured.
In order to avoid spending some factories around the licker-in, use a larger action angle for the serrated teeth 950 3.5*25.4mm, but it weakens the combing and the combing effect is poor.