Operation tutorial for Circular Knitting Machine

(1) Enter the workplace at the prescribed time and make thorough preparations for the succession. (2) Take the initiative to understand in detail the production, operation, process changes, variety alterations and relevant precautions of the previous site. (3) Carefully and meticulously inspect the operation of the machines, and stop each one to check the fabric surface. (4) Check the origin of the raw materials, whether there is any difference in linear density, whether the yarns are wrongly connected, whether the yarn barrels are skewed, and whether there is any oil stain, etc. (5) Make handover records on the fabric surface. The operation tutorial of the circular knitting machine: Reasonable and advanced operation methods are important prerequisites for improving the knitting production efficiency of the knitting machine and ensuring product quality. The shift handover work of the operators is a crucial step in establishing a normal production order, ensuring the smooth progress of production, and strictly controlling product quality. It is necessary to exchange information, clarify responsibilities, and jointly safeguard the quality. I. Requirements for shift handover operators: (1) The workplace must be kept clean and tidy, and the spare yarns on all equipment must be controlled within the specified size range; (2) Explain the operation status of the equipment in operation; (3) Describe the changes in fabric processing techniques, variety alterations, and raw material swaps. (4) Keep a clear record of the raw fabric: item number, specification and size, date, work number, raw material origin, batch number, weight, etc. Ii. Requirements for the incoming shift operator: (1) Enter the post at the prescribed time and make thorough preparations for the incoming shift. (2) Take the initiative to understand in detail the previous shift’s production, equipment operation, process changes, variety alterations, as well as relevant precautions; (3) Carefully and meticulously inspect the operation of the machines, and stop each one to check the fabric surface. (4) Check the origin of the raw materials, whether there are any errors in the linear density, whether the yarn tubes are wrongly connected, whether the yarn tubes are placed crookily, and whether there is any oil stain, etc. (5) Make handover records on the fabric surface. Section 2 Patrol Inspection Work Patrol inspection is divided into two types: general patrol inspection and key patrol inspection. I. General Patrol Inspection: (1) Time Arrangement and Requirements: General patrol inspection is mainly to prevent relatively obvious long defects. To prevent long defects from exceeding the specified length, operators need to patrol once every 5 to 10 minutes or so. (2) Inspection method: According to the inspection route, use visual inspection, auditory inspection, hand molding and other methods to check for obvious defects on the fabric surface and whether there are any abnormal phenomena such as abnormal noises from the equipment without stopping the machine. During the tour, if any problem is found, the machine should be stopped for handling. The principle of “three firsts and three delays” should be followed, that is, start with the nearest and then move to the farthest, the easier and then the more difficult, and the urgent and then the less urgent. Under the premise of ensuring the quality of the fabric, reasonable arrangements should be made and proper solutions should be made. Ii. Key Inspection Tours: (1) Time Arrangement and Requirements: Key inspection Tours must be based on general inspection Tours. The specific contents of the key inspection Tours are as follows: key inspection after shift handover, key inspection after fabric dropping, key inspection after sewing, and key inspection after handling broken yarns. Each piece of cloth should be stopped for key inspection 1 to 2 times during the process. As the key inspection period is relatively long, it is required that the operators, while ensuring the general round inspection, can carry out the inspection in batches. (2) Inspection method: According to the inspection route, conduct key checks through visual inspection, auditory inspection, and hand modeling, etc. The inspection should mainly focus on the fabric surface. Look at the fabric surface from the dark side to the bright side, carefully examine the fabric surface at the wall panel area, and also use your hand to check if there are any horizontal or vertical loose streaks, long broken needles, long missed needles, long flowered needles, various loose defects, and the tension of the fabric surface, etc. Then, check the yarn usage, yarn linear density, yarn tail joints, and yarn joining positions, etc. Iii. Intervals between Shifts: The intervals between shifts are mainly used to handle individual operations such as stopping the table, dropping fabric, and receiving yarn, as well as cleaning work during shift handovers. They must be reasonably arranged to ensure not only a balance between busy and idle work but also continuous shifts without interruption, always maintaining the initiative in production. The specific requirements for the operators are as follows: 1. If multiple shutdowns occur and the fabric surface cannot be processed within the interval of one fabric surface inspection tour, the processing shutdown should be stopped. A fabric surface inspection tour should be conducted first, and then the processing shutdown should be carried out to prevent long defects on the fabric surface. 2. According to the actual production situation, the fixed “must-do” operations such as yarn taking, fabric dropping and cleaning should be completed in a planned manner at each interval time to eliminate the chaos and avoid a vicious cycle, and the rotation should be carried out in accordance with the prescribed rotation cycle. Iv. Touring Route: To ensure that the touring operation is carried out in an orderly manner, it is necessary to follow a certain touring route to save time, reduce labor intensity and improve efficiency. The inspection route is generally reasonably arranged based on the arrangement of the machines to facilitate operation and avoid taking repetitive routes. In knitting enterprises, it is generally advisable to walk in a straight line and look at both sides. In addition, the inspection is carried out in a “U” shape, with a one-way view. Section 3 Cleaning and Hygiene Work The cleaning and hygiene work of the knitting circular knitting machine has a significant impact on the quality of the produced fabrics. During the operation of a circular knitting machine, due to the friction between the yarn and the machine parts, the lint (short fibers, known as “flower clothes” in factories), dust, impurities, etc. adhering to the yarn fall off, generating flying flowers that accumulate around the machine. These flying flowers can be carried into the knitting components at any time and woven into the fabric, causing defects. So removing these flying flowers and impurities is part of the daily work of the operators. Specific cleaning tasks include: 1. Removing flying flowers from the yarn frame, which is usually carried out during shift changes; 2. Remove the flying flowers around the weaving system, usually before the fabric drops. 3. Remove flying sparks from the yarn storage device and dust removal device (electric fan) once a week.