Detailed production process of forming knitted garments
one. Production process of forming knitted garments
The production of flat knitting machined knit garments generally follows the following steps:
(1) According to product style and color matching, use yarn raw materials and yarn fineness, fabric structure and so on:
(2) Determine the type and machine number of the knitting machine.
(3) Determine the specifications of the product and initially determine the amount of material used.
(4) Determine the production process.
(5) Consider the sewing conditions, select the type of sewing machine and the quality requirements for sewing.
(6) Consider the dyeing and finishing process and consider its quality requirements.
(7) Consider the modification process and auxiliary materials required for the product.
(8) Consider the trademark form and packaging method used for the product.
In short, the production process of fully formed knitwear is:
Yarn entering the factory → raw material inspection → preparation project → knitting project → garment engineering → finished product inspection → packaging and storage
After the yarn (raw material) enters the warehouse, the test and inspection department will take samples in time to test the line density and uniformity of the yarn count, and meet the requirements before it can be put into production. Most of the yarns entering the factory are in the form of skein, which must be subjected to a winding process to make it suitable for knitting of flat knitting machines. The woven semi-finished pieces are inspected and entered into the ready-to-wear process. The garment workshop is mechanically or manually stitched according to the process requirements. According to the characteristics of the product, the garment process also includes finishing processes such as napping, fluffing and embroidering. Finally, after inspection, ironing, shaping, re-testing, sorting, packaging, storage.
( 1 ) Purpose of raw material inspection
Linear density deviation, strip uniformity, moisture regain and color fastness of raw materials. Directly affect the quality of the product. Therefore, when the raw materials are inspected and problems are found, the process can be revised in time and technical measures are taken to avoid affecting the quality of the finished products.
( 2 ) Purpose and requirements of the preparation process
The skein entering the factory cannot be woven directly on the knitting machine; at the same time, there are various defects and impurities on these skeins. Will affect the quality and yield of the weave. Therefore, the purpose of the preparation process is to wind the skein into a simple form to meet the need for yarn unwinding in the weaving production; to remove defects and impurities on the surface of the yarn. Waxing the yarn. Make it soft and smooth; the yarn is twisted and stranded according to the process requirements to improve yarn fastness and increase fabric thickness. When winding the yarn, the elasticity and elongation of the yarn should be kept as much as possible, and the tension is required to be uniform and the unwinding is smooth.
( 3 ) Forming knitwear weaving equipment, weaving type and garment inspection
Weaving is the main process in the production of full-form knitted garments. There are two types of full-form knitting machines: flat knitting machines and circular knitting machines. The flat knitting machine can weave the garment piece suitable for the human body by increasing or decreasing the number of needles, and can be ready for garment without cutting, which not only saves raw materials but also reduces the number of processes, changes in pattern, and facilitates the change of varieties, so most enterprises use flat knitting machines. Weaving. The circular machine has the characteristics of high speed and high output, and it is getting more and more attention from some enterprises.
The pieces produced by the flat knitting machine must be inspected piece by piece after the machine is removed. It can only enter the garment process after meeting the requirements. The contents of the inspection include the specifications of the piece (ie, the length of the piece, the length of the rib, the number of rotations, the number of needles, etc.), the weight of the piece and the appearance quality, and the appearance quality includes the missing needle, the flower needle, the edge, the monofilament, and the like.
The density and specifications of the test piece should be checked after the piece is fully retracted. In the weaving process, the pieces are stretched by the longitudinal direction of the threading plate, the hanging hammer, and the tension during weaving. Therefore, after the machine is removed, it must be allowed to stand for a certain period of time, and then it will not reflect the actual density and specifications. However, this natural retraction (relaxation contraction) method takes a long time. In practice, in order to make the pieces shrink quickly, various external compression methods are often adopted. Such as shrinkage, contracture, curling and so on.
( 4 ) Garment process
1 . Garment process
The full-form knit garment is stitched to connect the collar, sleeves, front and back of the garment, buttons, pockets, etc., and some are also modified by wet finishing methods and embroidering methods to make the garments have certain styles and characteristics. The general process flow for garments is:
Sewing piece semi-finished product inspection shrinking buttonhole button buckle ironing setting garment inspection
2 . Garment process requirements
(1) Sewing requirements: The stitching of the fully formed knitwear should have a corresponding stretchability and strength with the body. Except for the pocket, the stretch rate is usually required to reach 1 30%. In principle, the stitching must be the same as the raw material, color and yarn linear density of the full-form knitted garment. The stitching of the carded product and the upper thread of the machine seam should be made of combed wool yarn. The bottom line of flat seams, overlocks, etc. should not be too high. Be soft, elastic, smooth and strong enough.
(2) shrinking requirements: shrinking is a wet finishing process. It is the use of the fluffing properties of wool fibers. Under certain conditions of damp heat,
Repeatedly by mechanical force, due to the scales on the surface of the wool fiber, it will produce directional movement, so that the fibers interpenetrate each other, and a layer of fluff is exposed on the surface, which can obtain a beautiful appearance, rich hand feeling, softness, smoothness and warmth. The fleece is suitable for carding products such as cashmere sweaters, rabbit sweaters, and sheepskin sweaters. The combed products can also be cleaned or lightly condensed at a normal temperature for a short period of time to improve the appearance of the product.
(3) Ironing and shaping: The purpose of ironing is to make the product have long-lasting and stable specifications and beautiful appearance. flat surface,
It has luster, full suede, soft hand and body. When ironing, the full-form knitted garments are put on the sample board, and the temperature is generally controlled at 120-180 ° C to prevent hot yellowing and aurora production during operation. Fully-formed knitwear is subjected to ventilation during the ironing process. Allow it to cool quickly and reduce humidity.
(5) Inspection of finished products
Finished product inspection is a comprehensive inspection of the full-form knitting of the product garment before leaving the factory, which mainly includes three processes of re-testing, sorting and dividing. The contents include the appearance quality (dimension tolerance, appearance defects), physical indicators (single piece weight, coil density), internal and external packaging, and the like. Repair a small number of defects that are not in the reverse range.
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