Double needle lockstitch machine (dnls) (2)
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This document describes a double needle lockstitch (DNLS) machine. It begins by explaining the basic principles of a lockstitch and the components involved. It then discusses the two main types of lockstitch machines: single needle and double needle. The bulk of the document focuses on describing the specific features and applications of the Juki LH-3120-7 double needle lockstitch machine, including its specifications, advantages, additional features like corner teaching, and applications for sewing various garments.
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The document summarizes the study of different industrial sewing machines and the functions of parts of a plain sewing machine. It lists 21 types of industrial sewing machines, including single and double needle lockstitch machines, single and double needle chainstitch machines, and buttonholing, button sewing, and snap button attaching machines. For each machine type, it provides images, specifications, functions, and applications. The objectives of the experiment were to learn about different machine parts and their specifications, uses of sewing machines, and how to create a proper lab report.Garment production(industrial sewing machines)
Garment production(industrial sewing machines)university of sust.
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Industrial sewing machines are used in mass garment production and come in different types for specific tasks. Single needle lock stitch machines are the most widely used and can join multiple fabric layers together for light to heavy materials. Overlock sewing machines have 3 to 5 threads and make edge stitches for finishing knit garment panels and seams. Flat lock sewing machines come with 2-3 needles and make cover stitches for hemming knit sleeves and bottoms or decorative seams. Feed off the arm machines make chain stitches for flat seams like shirt sides and jean inseams.Spme assignment Overlock machine
Spme assignment Overlock machinePragya
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This document provides information about overlock machines, including their definition, uses, anatomy, selection criteria, and working mechanism. An overlock machine is a specialized sewing machine that produces overlock stitches to sew over one or two pieces of cloth. It is commonly used for edging, hemming, and seaming fabrics. The machine uses loopers rather than a bobbin to create thread loops that contain the fabric edges within the seam. Key factors for selecting an overlock machine include threading ease, tension control, presser foot design, and stitch width adjustment. The machine creates overlock stitches through the coordinated movements of the needle, upper looper, and lower looper.Flatlock stitches and its Mechanisms
Flatlock stitches and its MechanismsUniversal institute of fashion technology
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Flat lock machines are specialized, high-speed machines that use two or more needle threads to form stitches by passing through fabric and interlocking on the top and bottom sides. They have multiple needles, loopers, and spreaders and can sew at speeds up to 6000 SPM. Flat lock machines are mainly used for sewing knitted garments but can also be used for woven fabrics. They require numerous thread types and adjustments to operate properly.Sewing Machines Stitch Fundamentals
Sewing Machines Stitch FundamentalsKAMRAN AHMAD KHAN
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The document discusses different types of sewing machines and their components. It describes the major parts of lock stitch, overlock, flatlock, and feeding systems. The main components include the casting, lubrication system, stitch forming system. For lockstitch machines, it explains the stitch formation process using a needle, bobbin and hook. Overlock machines use multiple thread cones and loopers. Flatlock machines can have decorative threads and multiple needles. Feeding systems include drop feed, differential feed, and walking foot feed.PPT for Q4 tle 7,8 dressmaking LESSON 1.2.pptx
PPT for Q4 tle 7,8 dressmaking LESSON 1.2.pptxCrislynBaados
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The document outlines various types of sewing machines, including their specific functions and components, emphasizing machines like the lockstitch, high-speed lockstitch, and embroidery machines. It details the two major parts of the lockstitch sewing machine: the upper and lower parts, along with their individual components such as the head, arm, and various controls. Additionally, it provides a comparative guide to identify different sewing machines based on their descriptions and uses.TLE 8 week 12 & 13.pptx
TLE 8 week 12 & 13.pptxBryanCallano1
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The document lists and describes various tools, equipment, parts and materials used for sewing. It discusses measuring tools like tape measures and rulers, cutting tools like shears and rotary cutters, marking tools like chalk pencils and tracing wheels. It also outlines types of sewing machines including lockstitch, overlock and embroidery machines. The major parts of a lockstitch sewing machine are described, including the head, arm, bed, spool pin, presser foot and needle. Components under the bed like the feed dog and bobbin case are also outlined. Finally, it briefly discusses the lower parts that drive the machine, such as the treadle, band wheel and pitman rod.Sewing machine presentation.(142 KMT- 1)BGMEA UNIVERSITY OF FASHION AND TECHN...
Sewing machine presentation.(142 KMT- 1)BGMEA UNIVERSITY OF FASHION AND TECHN...爨む鉦Θ爨爨逗Ξ 爨爭爨
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1) Elias Howe invented the first practical sewing machine in 1846, allowing for mass production of clothing.
2) There are three main types of sewing machines: mechanical, electronic, and computerized.
3) Different sewing machines are used for different purposes, such as lock stitch machines for general garment construction, overlock machines for edging, and buttonhole machines for attaching buttons.Machine Sewing Details
Machine Sewing DetailsShahrina17
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The document provides information about sewing machine parts and sewing techniques. It begins with an acknowledgement and introduction to the Apparel Manufacturing Technology (AMT) course. It then discusses the history of the sewing machine and provides diagrams labeling the principal parts of a sewing machine, including the sewing head, horizontal arm, vertical arm, and machine bed. The document also provides instructions for threading a sewing machine and describes various sewing techniques like superimposed seams, French seams, lapped seams, and topstitching. It includes diagrams illustrating different seam types. In conclusion, it presents a work list of sewing techniques and a chart of common sewing materials.Ad
Double needle lockstitch machine (dnls) (2)
- 1. Double Needle Lockstitch (DNLS) Machine-Ashima Singh(04)KamakshiMathur(08)SomyaTewari(16)
- 2. LockstitchA lockstitch is the most common mechanical stitch made by a sewing machine.The lockstitch uses two threads, an upper and a lower. Lockstitch is so named because the two threads, upper and lower, "lock" (entwine) together in the hole in the fabric which they pass through.
- 3. Principle of lockstitch machineTo make one stitch, the machine lowers the threaded needle through the cloth into the bobbin area, where a rotating hook (or other hooking mechanism) catches the upper thread at the point just after it goes through the needle.The hook mechanism carries the upper thread entirely around the bobbin case, so that it has made one wrap of the bobbin thread.The take-up arm then pulls the excess upper thread (from the bobbin area) back to the top, forming the lockstitch. Then the feed dogs pull the material along one stitch length, and the cycle repeats.
- 4. Types of lockstitch machinesThere are two types of lockstitch machines based on the number of sewing needles and bobbins present, they are:SNLS or Single Needle Lockstitch MachineDNLS or Double Needle Lockstitch Machine
- 5. Double needle lockstitch machineA double needle lockstitch machine works on the same principle as the SNLS machine while using two needles and two bobbins thus resulting in two parallel rows of lockstitch.The distance between the two stitch lines depends upon the distance between the two needles on the needle bar which can be adjusted.
- 6. DNLS machine contd..When the stitch forms correctly equal amounts of bobbin and needle thread are used. Upper and lower threads interlock in the centre of the fabric.It is a poor choice in areas that must stretch, it has the least amount of elongation potential. hence inappropriate to attach elastic or to sow knit fabrics or bias seams.
- 7. Dnls machine contd..Have more downtime since they operate with a limited thread supply from bobbins which must be replaced as they run out. The tightness of the interlocking stitch maybe a problem for operators when ripping is needed.
- 8. Characteristics of juki-lh-3120-72-needle, Bottom-feed, Lockstitch Machine with an automatic thread trimmerLow noisefast speedsteady and enduring especially when sewing underwear, jeans, coat's turning and decorative parts.Synchronized feed of the needle bar and feed dog to avoid distraction.Adopt inside oil line box to realize cycling oil supplyDouble needle bar discrete design, easy for sewing turning , acute angle and direct stitch.油
- 11. Applications油Sew box pockets on safari jackets, light jeans and pyjamas.Topstitch front collar edges of safari jackets etc. Sew pockets on coats
- 12. Sew skirt box pleatsTopstitch the collars of ladies wearTopstitch the cuffs of ladies wearSuitable for sewing Shirts, Uniforms, Jeans and Women Underwear. The double needle lockstitch is the tightest and most secure stitch which makes it a good choice for stitching the inseam of trousers.Machine features際際滷 type presser foot capable of preventing loose stitchesThread trimming mechanism with twin bobbinsThread tension controller equipments to produce even stitches
- 13. It belongs to special interlock sewing machine for heavy duty garment seaming, such as pants, jeans, work uniform and leisure clothes.It is recommended for stitching overalls uniforms, jeans and decorative sewing on bags since it features synchronized feeding of needle bar and feed dog.They are applicable to the ornamental seam of garments like jeans, skirts, overcoats and uniforms and the edge-pressing sewing.Compact wiper
- 14. AdvantagesLockstitch machines are versatile and can be used for a variety of operations Compare to all other stitch types, this class uses the least amount of thread and produces the flattest stitch.it is reversibleThe double needle lockstitch is the tightest and most secure stitch.It is the only stitch formation that can be backstitched if the ends need to be secured.It is non-ravelling.Good handLies flat on the fabric
- 15. Additional features When one of the needle bars is stopped, it is held in place with added stability. The machine is able to run at the highest rpm even when only one needle is in operation (the other needle bar is held idle). This feature totally eliminates a fundamental problem of 2-needle bar lockstitch machines, which is how to hold either needle bar securely in an idle state.
- 16. Corner-teaching functionTo start corner sewing, the operator need only pressthe right or left stop switch. Then, the machine automatically counts the number of stitches. This allowsthe operator to concentrate on material handling.Upon completion of corner sewing, the one-needle stopstate is automatically reset.Press the left-needle stop switch at point A to stop the left needle.2. Perform sewing with the left needle bar held idle until point B is reached.(The number of stitches is automatically stored in the memory)3. At point C, the left needle, which has been held in an idle state, is automatically released.
- 18. Thank you!