addCustomization: Type: Sewing Machine Usage: Sewing Equipment

Automation level: Fully automatic Applicable thickness range: Thick material machine Thread type: Quilting machine
Brand: Aoling Japan Model: RN9300-C Applicable Location: Factory Use
Target audience: Leather, fabric Drive form: Electric Needle number: Three needles
Number of wires: Five wire head number: Single head machine Product type: Brand new
Product alias: Sewing machine

Aoling RN9300-C New High Speed Stitching Series - Fully Automatic Thread Cutting/Ultra Small Mouth Computer Driven Cylinder Stitching Machine

The Aoling RN9300-C high-speed overlock sewing machine, also known as a special sewing machine, sews chain stitch threads. This stitch is commonly used for rolling collars, rolling edges, folding edges, stretching seams, splicing seams, and edging in knitted clothing. In recent years, there have been numerous changes in the styles of ready to wear clothing, and overlock sewing machines are often used for sewing decorative stitches. Moreover, there are many variations in the stitch styles sewn by overlock sewing machines, such as three needle four thread overlock (stitch 407) which can be changed to two needle three thread overlock (stitch 406), or from two needle three thread overlock to two needle four thread overlock or three needle five thread overlock (stitch 602 or 605). In order to better understand the purpose of overlock sewing machines, the following research will focus on the conveying power, head design, and stitch changes of overlock sewing machines, fully leveraging their potential.

1、 The conveying power system of the sewing machine

Because the overlock sewing machine is mostly used for sewing knitted fabrics, it often uses two sets of feeding teeth, front and rear, to transport the sewing material. This type of conveying power is that the two sets of feeding teeth are relatively independent. The synchronous conveying action of the front and rear feeding teeth can be adjusted, or there may be fast and slow differences. When sewing knitted fabrics with strong elasticity and two-layer lightweight knitted fabrics, the feeding speed of the feeding teeth can be adjusted to be faster than that of the differential teeth, or slower than that of the differential teeth. Correctly adjusting the feeding speed of the feeding teeth and the differential teeth can reduce elongation and shrinkage deformation of the sewn fabric, making it beautiful.

2、 Design of the head type
The design of the head type of the overlock sewing machine is mostly a high platform device. In order to meet the production needs of various sewing processes, the design of the head type also includes round mouth arm around type, round mouth arm out type, round mouth arm in type, etc. The high platform type overlock sewing machine head is suitable for sewing flat cutting pieces with long seam lines; The round mouth wrapped arm type is designed for sewing the edges of rolled or folded cuffs; The round mouth arm type is used for sewing seams on cylindrical parts, such as the seam on the bottom of sleeves and the seam on the side of pants; The round mouth arm type is designed for sewing the bottom seam of underwear; In addition, the high platform machine head can be equipped with a slanted design to match the sewing of different shapes of cut pieces. Some sewing machines are designed with an installation position for a sewing accessory (sewing aid) on the right side of the machine head. If applied to the operation process of rolling edges, the sewing accessory can be continuously matched with the sewing on the right side of the needle plate.

3、 Application of Stretching Machine in Production Process

（1） Make rolled edge stitching

Use bundling strips to wrap the rough edges of the cut piece around the sewing seam, and roll the edges if bare. The number of layers of sewing material on the seam is too many and too thick, which may be uncomfortable when wearing clothes that are cut to fit the body. However, if the 602 (two needle four thread sewing) or 605 (three needle five thread sewing) stitches sewn with a flat sewing machine are used to wrap the burrs of the tie, the number of layers of sewing material on the seam can be reduced from five to three, or 406 (two needle three thread flat sewing) or 407 (three needle four thread flat sewing) stitches can be used (removing the decorative thread covering the surface of the flat sewing machine can change from 602 stitches to 406 stitches), as shown in the figure. A sewing assistant for rolling edges can be installed on the overlock machine to reduce the thickness of the seam and improve operational efficiency.

（2） After wrapping, stretch the seam
Knitted garments, after being sewn with overlock seams, may not fit snugly due to protruding seams. In this case, flat garments can be covered with stretch seams. Make the protruding seam fit snugly, but this process often requires special needle plates and presser feet to fix the seam and make the operation easier to control.

（3） The sewing process of adding lace
Due to the width between the two or three stitches of the tension stitch, there are also mesh like stitches that can cover the lace strip and directly sew onto the seam of the cutting piece. And there is no need to fold the edges of the cut piece to prevent loose edges, which can reduce the thickness of the seam and make it more comfortable to wear. This method is commonly used for sewing women's knitted underwear.

（4） Folding edge stitching process

In order to reduce the thickness of the folded edge seams, the edges of finished garments are often sewn with overlock seams and then subjected to single fold stitching or hidden thread stitching, such as at the hem of skirts, pant legs, cuffs, etc. This can reduce the twisting phenomenon often caused by double fold stitching due to bending. However, this treatment method requires two processes of overlock and then stitching. If the style of the finished garment matches, 406 (two needle three thread stitching) can be used to stitch the single folded edge seams. Combine two processes into one process to improve production efficiency.

（5） Sewing on elastic fabric

Due to the strong stretchability of the stretch line, it is particularly suitable for sewing knitted fabrics or other elastic fabrics, such as knitted T-shirts and underwear, which often use stretch sewing machines. In addition, the stretch stitch can be covered with a mesh like decorative thread on top, which not only has a certain decorative value, but can also be used to sew the knitted/sweater bag with this stretch stitch. This can reduce the thickness of the folded edge and is easy to operate. It does not require ironing the seam at the edge of the bag and can directly sew the bag piece, which can save the operation process and time.

Through the analysis of the above process applications, it can be seen that the use of the overlock sewing machine is very wide. If its performance is effectively utilized, the appropriate head type can be selected for application, and the appropriate sewing assistant can be equipped at the appropriate time, the high-efficiency characteristics of the overlock sewing machine can be better utilized.

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About Aoling Special Machinery Lubricant Series Picture Explanation

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