Leather products industry need to use leather sewing machings. And leather sewing machines used in the production of pieces, leather suede garments and luggage. Today, let's take a look at the advantages and disadvantages of the types of stitches commonly used in the leather goods industry.
In the leather products industry, when the type of stitch is selected, under the premise of ensuring the thread effect, the sewing thread consumption is small, and the sewing cost can be reduced. Therefore, the leather products industry is the same as the clothing industry. In actual production, the vast majority of the products used are double-line lock stitches (also known as flat stitches). However, due to different material properties and different use states of finished products, leather products There are some differences in the types of stitches selected by the industry and the apparel industry.
Generally, the garment material is made of yarn. Whether it is a thin or thick woven fabric and a stretchable knitted fabric, it is necessary to protect the cut fabric from being unthreaded, so multi-strand reinforced overlock stitches are used. From the point of view of finished products, some parts of the site have a large amount of activity and friction, and the stitches are required to have a certain elasticity and a large amount of expansion.
Generally, the clothing material is thin and soft, not as soft and stiff as the leather garment material, and there is a reinforcement problem that makes the shape of some parts relatively stable. General clothing is basically done by sewing, and there are many processes. From the technical point of view, some sewing processes have special requirements for stitches, so there are many types of stitches commonly used in the clothing industry. In the leather products industry, since the needle used when passing through the leather material has a slit, the density of the wire trace is generally small.
In addition, the leather material is different from the fabric of the clothing industry, so the sewing machine for suede clothing uses a single-thread overlock stitch; the injection machine (the shackle) uses a shoe machine, produces a car seat cushion, etc. The overlock sewing machine used is a single- or double-line overlock stitch, unlike the clothing industry, which is mainly composed of multi-line overlock stitches.
In the leather products industry, such as the most important footwear industry, the seam processing of finished product processing technology has not been dominant, and sewing is only used in some processes of component processing. Despite the wide variety of leather products, the nature of the leather (stiffness, elasticity, strength, etc.) and thickness are different. The finished products have different requirements due to different purposes. From the perspective of finished products, most leather products have little deformation during use. Unlike products in the apparel industry, there are high requirements for the flexibility of stitches, so there are fewer types of stitches used.
There are many kinds of leather sewing machines, and the structure is sophisticated. On the basis of mastering the "strike principle", we understand the structural principle of the four basic mechanisms (bow! line mechanism, hook line mechanism, thread take-up mechanism, feeding mechanism) composed of seam-forming members, which is the key to mastering the sewing machine technology.
The determination of the seam type plays a decisive role in the processing method of the sewing product and the quality of the finished product. It should be recognized that in addition to the function of the seaming member, the sewing accessories (such as pleating, dark line attachment) .The role of the quality ensure sewing operations and improve production efficiency is also very important.
Therefore, it is not only necessary to combine the characteristics of the workpieces in the leather products industry to understand the sewing machine for leather products, but also to learn the structure of the sewing machine and master the techniques of using maintenance and troubleshooting. Further knowledge of the sewing machine related to the process should be applied at the level of design and process development in order to better grasp the sewing technology, achieve the correct selection, and improve the productivity and product quality.