Automatic overlock machine

Types of automatic overlock machine

There are several types of automatic overlock machines, each categorized based on the number of threads they use for stitching, the types of fabrics they can handle, or the specific functions they perform. The following overview highlights the most common types:

• Automatic 2-Thread Overlock Machine

  These machines make simple seams and are mostly used for piecing operations. Because it uses only 2 threads, the seam it creates is thinner and consumes less thread compared to other seam types. This makes the machine ideal for light materials where less stitching is required for support and where the seams don't need to be heavy-duty.

• Automatic 3-Thread Overlock Machine

  A 3 thread overlock machine can easily produce stitch types like overlock stitches, rolled hems, and narrow hems. This versatility accommodates various sewing needs, from securing the fabric edge to preventing fraying. Such characteristics make these machines suitable for general wear of light to medium-weight fabric.

• Automatic 4-Thread Overlock Machine

  These machines have redundancy in stitching, which makes them ideal for high-quality seams. The additional thread provides a buffer since the seams can still retain their integrity even after fraying. This makes the machine suitable for heavy-duty wear of light to medium-weight fabrics. Automatic 3-Thread Overlock machines are ideal for general wear of light to medium-weight fabric.

• Automatic Safety Stitch Overlock Machine

  These machines create strong and secure seams with an internal structure of two overlock lines and one lock or safety line. This makes them suitable for high-stress areas of garments requiring more durability, for instance, at the waist or side seams.

• Automatic Rolled Hem Overlock Machine

  This type of machine is focused on hem finishing. These machines make new and tighter hems for fraying prevention on lightweight fabrics such as chiffon, silk, and lace. The rolled hem is extremely small and uses little fabric in a difficult or decorative edge used in light covering.

• Automatic Flatlock Overlock Machine

  The characteristic of flatlock machines is that they sew two fabric pieces together by making flat seams without the outside of the fabric being seen. They are mostly used for joining seams or making decorative seams. They are ideal for lightweight to medium-weight fabric machines.

Industrial applications of automatic overlock machine

Automatic overlock machines are widely used in various industries, especially where mass garment production requires efficient edging and seaming. Some industrial applications include:

• Fit and Tailoring

  They are used for creating tailored fits by providing stretch and durability along the seams; this makes the garment perform better. Automatic overlock machines are important in tailoring and fashion industry establishments because they improve speed and accuracy while maintaining a high standard of hem finishing.

• Automotive and Aerospace

  In the automotive and aerospace industries, overlock machines are used in the manufacture of seats, upholstery, and interior lining. This helps in providing better resistance to wear and tear, hence durability. Automatic overlock machines help manufacture these components quickly without efficiently compromising quality.

• Home Textiles

  As for curtains, upholstery, or beddings, automatic overlock machines are critical in the home textile industry. This helps in providing professional free hems and seams that are responsible for fraying prevention. Given how they are applied, these machines improve the production capacity while giving the company the ability to handle different designs.

• Workwear

  Overlock machines are also used in the production of workwear or industrial uniforms. Most of these fabrics undergo strenuous work; these machines provide tough and long-lasting seams so that clothes will stand up to wear over time. Automatic machines are efficient in large-volume production to meet demand.

Product specifications and features of automatic overlock machine

Automatic overlock machines have several features and technical specifications that determine their functionality, operational capabilities, and best uses. Some of the most common features of these machines are highlighted below:

Technical Specifications

• Number of Threads: Based on the type, automatic overlock machines have different numbers of threads: 2 threads for simple seams, 3 threads for light construction used in overlock and rolled hems, 4 threads for durable sewing, and 5 threads for safety overlock stitches.
• Stitch Types: Most Automatic serger machines come with different stitch functions, including overlock stitches, flatlock stitches, rolled hems, cover stitches, and safety stitches.
• Speed: Automatic overlock machines can run at different speeds. Speed is usually measured by the number of stitches per minute. Higher operation speeds equal higher production rates. However, basic or more intricate management may result in lower speeds that are more helpful in quality production.
• Needles: Some automatic overlock machines require special kinds of needles, while conventional home overlock machines use standard needles. Others use extra needles for more complex stitches, such as cover stitches or chain seams.

Features

• Automatic Tension: Yarn tension is set and adjusted automatically with the help of these machines. This helps create consistent and correct overlock stitches regardless of the fabric type or thickness used.
• Automatic Cutting: These machines have attached cutters to cut the fabric edge and finish the raw edge, thus creating overlock stitches. This reduces manual work and time taken in production.
• Differential Feed: Most of the machines have feed dogs in different ways to allow the fabric edge to stretch or gather according to the needs of the task. This is an essential feature when dealing with stretchy or slippery fabrics.
• Foot Pedal Operation: Most sergers operate by a foot pedal the same as regular sewing machines, with some newer automatic machines coming with automated sewing machines with foot pedal-free operation for efficiency in mass production.
• Extension Tables: Extension tables available on overlock machines provide extra support when handling large fabric pieces.

How to fix

• Thread Breakage: If there is thread breakage, it only disturbs the work process. Thread should be passed accurately and tuned to required tension; worn out threads should not be used.
• Skipped Stitches: Stitches are sometimes skipped because the threads are wrongly tuned; the needle should be for the kind of fabric used.
• Serging Inconsistencies: Walking foot problems can be blamed for fabric shifting, so use fabric clips and a walking foot to hold the fabric tight while cutting.
• Running Drives: If there is a noise, ensure the threads are wrongly tuned and the needle is readjusted in its position.
• Jammed Machine: The mistake of running a machine in high speed is sometimes making it jam, and it needs a rest.

Quality and Maintenance of automatic overlock machine

The quality of stitching and the longevity of automatic overlock machines depend significantly on their maintenance. Following regular and proper care guidelines ensures operational efficiency, reliability, and fabric integrity.

• Quality Factors

  Automatic overlock machines have an integral design that directly affects their quality. Premium quality parts ensure the machine is durable and sturdy, easily handling the industrial fabric. Machine quality is also determined by smooth operational machines without jerk and automatically adjusting fabric tension. This is important for consistent stitching based on different fabric types and thicknesses.

  Another critical element is stitch quality. Any machine can achieve perfect overlock stitches. Quality machines can also achieve or comply with various standards, such manufacturer's or country's quality standards.

  The quality of seam also integrates such factors as thread use efficiency, seam elasticity, and fray resistance. A quality overlock machine should use less thread to give more elastic seams with better fray resistance. This is very important, especially in garments.

  Fabric handling should be smooth without slipping, stretching, or puckering. Quality machines come with differential feed that can be adjusted to prevent such problems from occurring.

  Lastly, a professional finish on the clothing or textile depicts the quality of the overlock machine. Consistent and good quality stitches indicate good quality machines.

• Maintenance

  While talking about care and maintenance, many new automatic overlock machines require less maintenance than old models. It is, however, necessary to pay much attention to some components like needles. Needles should be checked frequently to ensure they are sharp and not rusty. Change them after a specified number of hours to run the machine.

  Automatic overlock sergers requires lubrication for good working conditions. They should be lubricated as per the owner's manual. Some parts require lubrication after a specified number of working hours, while some parts require lubrication every time during threading.

  For internal dirt and dust, a professional serger's vacuum needs to be used, as dirt and dust can easily jam moving parts. Belts are also checked for dirt and dust and worn out. They also might need to be changed from time to time.

  For the Automatic overlock machine to run in the proper state, some checks should be done – checks for functioning and proper working conditions, check of the path of movement, and functional testing. If further problems are found, repairs should be done immediately before the onset of major problems. Also, external covers that have dust, dirt, or any other substance should be cleaned to make them look professional decorous.

  In layman's terms, overlocker machines have to be professionally housed and stored and, at the same time, vendor-housed machines cared for to achieve optimum quality in the production of quality products.

Q&A

Q1. How many threads can an overlock machine handle at the same time?

A1: Depending on the model, some automatic overlock machines handle 2 to 5 threads at the same time for various stitch types.

Q2. Can automatic overlock machines work on heavy fabrics?

A2: Yes, some overlock machines are designed to cut through thick layers of fabric. However, one must choose a model with a strong motor and pressure feet.

Q3. How often should automatic overlock machines be serviced?

A3: To keep the machine in running order, cleaning and oiling it after every major use is a must, along with a needle change.

Q4. What is the main difference between a serger and an overlock machine?

A4: The simple meaning of both words is the same, but 'serger' is a more commonly used name in the manufacturing industry than 'overlock'.

Q5. Do automatic overlock machines require different types of needles?

A5: Needles should match the kind of fabric to achieve the best results, and there should be no compromise on this.