In order to adapt to the new market competition situation and seize more market shares, the competitiveness of corporate products must be improved. The advancement of equipment and technology and the improvement of product quality are effective ways to achieve this goal. Combing equipment is indispensable equipment for developing spinning varieties and producing high-count and high-quality yarns. Let’s briefly analyze how our factory can utilize the efficiency of combing equipment and improve the quality of combed strips:
Adjustment of carding distance, carding distance refers to : The distance between the highest surface of the cylinder needle tip and the upper jaw when closed and pressed down. It is directly related to fiber carding. Under the premise of production safety, it is more appropriate to control the carding distance between 0.2mm and 0.4mm. Through experiments, under the conditions where the mechanical error is allowed, the most important thing is to achieve good consistency in the carding distance of each eye between the same machine, and the table difference between machines of the same type should be small. During our adjustment process, The eye difference between domestic machines is relatively large, ranging from 0.3mm to 0.8mm to 1mm, which has a great impact on the stability of the quality. After adjusting to a unified level of about 0.25mm, the quality has been significantly improved. It has laid the foundation for the single combing process plan of our factory’s low-nep products. An inspection of the imported Rieter machines showed that the combing intervals of most machines are relatively uniform, generally between 0.3mm and 0.4mmm, and some individual holes also have larger It is about 0.6mm, but in order to improve the quality, we uniformly adjust the carding distance to about 0.25mm.
Adjustment of the top comb spacing. The top comb spacing includes the high and low spacing (insertion depth) and the in and out spacing. It has a great impact on the combing effect. If the top comb is inserted too Deep insertion will lead to intarsia, and too shallow insertion will lead to insufficient combing. Therefore, the insertion depth of the top comb is the deepest without intarsia. In the production process of existing varieties, under the condition of suitable temperature and humidity, the insertion depth of the top comb is at +1mm can be produced smoothly and the index is good.
The entry and exit distance determines the length of fibers that the top comb can comb. When the nipper is in the most forward position, the top comb blade is very close to the separation jaws, and the fiber length it can comb The distance between the top comb and the separation roller is 0.15-0.2mm at 24 degrees.
Cylinder positioning. Regarding the positioning of the cylinder arc plate, it determines how early or late the first row of needle teeth enters the beard bush. The timing of the cylinder is generally at 36 degrees, 37 degrees or 38 degrees. The cylinder positioning of new combing machines generally no longer uses 38 degrees. This is related to the timing of the counter-rotation of the separation roller sooner or later. The fiber is long, so the timing of counter-rotation should be early, and the positioning of the cylinder should also be earlier accordingly. However, for direct rotation As far as the E65 combing machine is concerned, in the trial spinning comparison test of long-staple cotton, the influence of cylinder positioning on the index is not obvious. Since the E65 combing cylinder adopts variable speed transmission technology and CAPD optimization technology, in the cylinder 37 When positioning at 37 degrees, it is more reasonable in terms of puncture ability and energy consumption of the fiber front end, so it is better to use 37 degrees positioning for the Rieter E65 combing machine.
Daily cleaning work, during the production process, the pliers jaws are prone to accumulation of flowers, especially the accumulation of flowers in the upper jaws is very difficult to find, if the accumulation of flowers in the jaws will cause The jaws do not hold the beard well, resulting in an increase in long fibers in the waste, increased uneven weight of the product, poor carding and other adverse consequences. Therefore, inspections during the daily production process should be increased. In addition, the brush’s impact on the cylinder Cleaning is particularly important. It is advisable to insert the brush into the needle gap of the cylinder by 0.5mm, so focus on the cleaning of the cylinder.
Regarding forward cotton feeding and backward cotton feeding, under the conditions of the same cotton feeding length and the same separation distance, the backward feeding cotton waste will be large, and the fibers entering the waste will The length is long, and the same fiber is repeatedly carded slightly more times. Similarly, under the same noil requirements, the separation distance during backward feeding is smaller than that of forward feeding, so the carding quality of forward feeding and backward feeding is poor. There is no difference between good and bad, but on the Rieter combing machine, forward feeding is used when the noil requirements can be met. The short feeding method is more beneficial to production. </p
