The presser foot of the sewing machine plays a very important auxiliary role in the sewing process. The fabric can be fixed and moved on the machine through the cooperation of the feed dog of the presser foot. However, because the position of the presser foot device is different between brands, the presser feet of different brands cannot be called. Therefore, it is very necessary to master the use skills of each presser foot for proficiency in the use of sewing machines.The types of presser feet can be distinguished by material and use. Common presser foot materials are:
1. Metal presser foot
Metal feet are most commonly found on sewing equipment. The metal presser foot is durable, wear-resistant, widely applicable, and not easy to deform. The metal presser foot is mostly made of all steel, with chrome-plated and nickel-plated surfaces. The chrome-plated presser foot has a brighter luster and wear resistance, while the surface of the nickel-plated presser foot is duller and anti-oxidant.
2. Resin presser foot
Resin presser feet are widely used on sewing machines in recent years because of their low pressure on fabrics and high friction between the surface and fabrics, making them difficult to slip. They are especially useful for sewing light, smooth, coated and leather fabrics. obvious advantage. The main advantage of the resin presser foot is uniform feeding, low pressure and no tooth marks. However, the service life of the resin presser foot is short. When u

Double needle sewing machine, double needle machine, double needle machine refers to a sewing machine with two needles, and the effect is that the double threads are juxtaposed and parallel to each other. A pair of trousers uses double needles less than flat lathes, so in the workshop, the matching of flat lathes and double needles is about 5:1, but it is indispensable. The efficiency of the double needle is high, and the double thread is parallel and neat. All kinds of double-needle machines have a very troublesome problem, that is, the machine is unstable. The maintenance rate is high, especially after a few years of use, and many phase times are a bit messed up. Many machine repairers can't adjust it well.
        First, we start with the needle post and feed dogs. First adjust the amount of cloth feeding (adjustment dial) to zero. When there is no cloth feeding, turn the flywheel so that the needle column is at the bottom dead point. Loosen the fastening screw of the horizontal feed rocker arm, and adjust the inner distance between the needle column and the presser foot rod to about 1.5mm. If it is not adjusted properly, it will cause skipping and broken needles. Note that the needle drop point of the feed tooth hole will change after adjustment, and the feed tooth should be adjusted to match. The cloth feeding time should be adjusted so that the engraving point of the horizontal cloth feeding cam coincides with the engraving point of the lower

There are many kinds of punching machines, and there are also punching machines specially designed for punching certain materials, such as automatic leather punching machine, leather punching machine, mold punching machine, and CNC punching machine. There are 4 categories of common punching machines in the world:
1. CNC punching machine
Suitable for punching of leather, cowhide, artificial leather, plastic, PU, EVA, PVC, various cloth, paper, leather accessories, shoe uppers, trims, curtains, automotive leather chairs, etc., widely used in automobiles Accessories (breathable cushions), luggage, handbags, stationery, shoes, breathable materials, advertising paper and other industries.
2. Mechanical punching machine
It is mainly suitable for large-area punching processing of sponge, leather, cardboard, non-woven fabrics, etc.
3. Pneumatic punching machine
Pneumatic punching machine, also known as pneumatic punching machine and plastic bag punching machine, is a pneumatic punching die that is auxiliary to the bag making machine. The pneumatic mold that transmits the signal from the computer of the bag making machine to the solenoid valve and then works. Its structure is similar to a cold stamping die, mainly used for punching plastic bags and paper products. The device was introduced to the mainland from Taiwan in the early 1990s. Technical approval: The mold base of the pneumatic punching machine is made of precision casting alloy material, the stamping