Three-step quality control of shirt production To ensure the quality of shirt production, first of all, various technical documents must be prepared before being put into production, and distributed to the process, inspection, production and other departments and relevant workshops, and the technical documents required for processing, such as paper, Process cards, signs, etc. meet directly with the operator to ensure that the operator can easily use these technical documents during the process. The more complete these production preparations are, the more assured the continuity and balance of the production process will be, and there will be a good environmental condition for improving the quality.
Production preparation also includes determining the arrival date, quantity, and quality of fabrics and other accessories to link up with the production plan. Avoid overloading of key equipment (such as embedding clamps) and key types of work. Ensure that the equipment put into production is in good condition, can meet the technological requirements, and has equipment repair plans. Correctly arrange the labor force, so that workers with higher technical level can be arranged in key processes and key equipment. Both inspectors and operating workers should have the necessary measuring tools, and these measuring tools should be within the validity period of the periodic verification.
The production of shirts has to go through many processes, and we call the processes that require key control the quality management point. These quality management points are the quality characteristics, key parts, weak links and dominant factors that need to be controlled in the manufacturing site within a certain period and under certain conditions. It can be a certain quality characteristic of the product or part, such as the size of the shirt; it can also be a key part and key process, such as the appearance of the placket, the collar, and the sleeve.
The quality points of the shirt are set as shown on the right page.
The quality control of shirt production should start from the following aspects.
1. Fabric inspection Fabric inspection is the first level of shirt processing and it is also a crucial level. Only qualified products can enter the next process. Some defects in the fabric are difficult to eliminate during the processing process, which directly affects the quality of the finished product Thick yarn, broken yarn, neps, holes, oil stains, etc. Cloth inspection can be divided into the following contents:
(1) Use a cloth inspection machine to inspect each piece of fabric under a standard light source light box, and mark the edge of the fabric where there are defects. For fabrics with a large number of defects or fabrics with unacceptable defects, it should be used as appropriate Or return to the supplier.
(2) Color difference test, compare the color of the head, middle and end of the same cloth, and use the color chart to check the color of each cloth.
(3) Shrinkage rate. The shrinkage rate of the fabric directly affects the stability of the shirt size. A fabric with an excessive shrinkage rate is not conducive to controlling the shirt size.
(4) Check the amount of horses to ensure the quantity of fabrics to be produced, so as to complete the orders according to the amount.
(5) Fabric structure inspection to check whether the tightness, thickness and density of the fabric meet the requirements.
2. Intermediate inspection inspection can take many forms, according to the order of the work process can be divided into purchase inspection, process inspection and finished product inspection, according to the inspection site can be divided into fixed inspection and flow inspection, according to the number of inspections can be divided into full inspection and sampling inspection. The intermediate inspection in the processing of shirts is mainly based on the combination of process inspection and flow inspection. It prevents the occurrence of process defects such as seam type, seam distance and size that do not meet the production process conditions, so as to effectively prevent and Control bad products.
(1) Process inspection Process inspection is inspection during processing. Process inspection not only checks the processing quality of the process, but also checks the process factors that affect the quality of the process. Its role is to prevent defective products from flowing into the next process and prevent a large number of defective products. Process inspection can be divided into process inspection and process inspection. The process-by-process inspection is more effective to ensure the processing quality, but the inspection workload is larger. For shirt companies, several procedures are generally used for inspection. The inspection points are mainly located in key procedures where the quality is easy to fluctuate or have a great impact on the quality of the finished product, or procedures that cannot be returned for repair, such as the collar and sleeve The semi-finished products must be inspected before the process of merging the pieces and before the non-repairable process such as opening the door.
(2) Mobile inspection Mobile inspection, also known as touring inspection, is an inspection conducted by a full-time inspector to the operator's work site. Through the circuit inspection, the unstable factors in the production process can be found and corrected in time to prevent the occurrence of batches of defective products, and it is also convenient for the full-time inspector to guide the operator.
During the tour inspection, the inspector conducts inspections on the quality of the semi-finished products and finished products processed by the relevant processes, the status of the workers performing the process, the arrangement of ideas on the process control chart, and the isolation of waste and defective products according to a certain inspection route and number of tours. an examination.
2. During the sewing process of the shirt, whenever a semi-finished product is to be stitched, it must go through an intermediate inspection by special personnel to ensure that the semi-finished product is a qualified product and prevent the defective product from flowing into the next process. Finished product inspection Finished product inspection is also called final inspection, which is a comprehensive inspection before the product is put into storage. This is a necessary measure to prevent unqualified products from leaving the factory. After inspection of the finished product, the inspection department shall issue a certificate of conformity to the qualified product. In apparel processing enterprises, the inspection of finished products mainly focuses on the inspection of the tail process of apparel appearance, packaging methods, packaging materials and so on.