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

The shoemaking industry has a wide demand, which has also led to the shortage of shoemaking sewing machines, and the number of shoemaking manufacturers has sprung up like mushrooms. Therefore, the number of manufacturers purchasing shoe-making models has increased accordingly. There are many kinds of common auto sewing machine shoes, such as double thread side sewing machine. It can be said that there are many brands in the market, and the quality is also uneven. Therefore, when using this kind of equipment, people will find that there are often broken threads, broken needles, etc. What is the situation?
        We know that people will rest when they are tired, and the machine is the same. Reasonable use can effectively prolong the service life. Problems such as thread breakage, skipped stitches, loose stitches, and broken stitches basically occur when the thread is not properly debugged in the early stage of use.
        For example, the thread breakage problem is basically caused by the threading clip adjustment of the double-thread side sewing machine equipment being too tight and incorrect threading.
        Needle breakage, and the broken needle problem is because the pulling speed of the product is too fast, which leads to the pulling of the machine needle and the breakage of the machine needle.
The flower needle phenomenon is that when the Shoes Sewing Machine sews the upper of the cloth fabri

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

Application of leather punching machine in manufacturing industry
In life, people cannot do without leather products. The most widely used are leather shoes, or car leather cushions. In the manufacturing process of these leather products, there will be a process, which is punching.
Punching, in the traditional manufacturing process, the most primitive is the hand-held punch, which is knocked with a hammer. In this case, the speed is very slow. The most advanced is to use a laser marking machine to burn through the leather. However, there is a problem. Using a laser will cause the leather to lose its luster, and it will also turn black and smelly, especially for light-colored leather such as white, which is prone to hair loss. Black and can't be removed. In order to solve these many disadvantages, a leather punching machine has been developed, which uses automated equipment to punch leather.
cnc leather punching machine is suitable for punching processing of cattle and sheep leather, artificial leather, paper, shoe uppers, automotive accessories, etc. , the whole machine is made of welded steel structure, which is stable and rigid during high-speed operation. The transmission system mainly uses a servo motor to drive the ball screw. The main principle of the leather punching machine is mechanical stamping, which uses the crankshaft rotation radius to To achieve the mechanical reciprocating circular motion, forming the function of stamping.
The leather punch

     Design of highly automated industrial sewing machine electrical control system, industrial sewing machine embedded controller and stepper motor control drive module, using digital signal processor (DSP), and on the basis of analyzing the dynamic characteristics of the motor, the motor speed-up and down curve is given The realization method realizes the linkage of three-axis motors at high speed and the precise sewing of various customized patterns, and carries out sewing machine embroidery designs.
      Advanced mechatronic computerized canvas sewing machine, pattern sewing machine can automatically carry out the set sewing work after detection and feedback according to the change of conditions in the sewing process, realize laser or infrared clothing piece positioning, automatic edge sewing, thick and thin sewing Automatic adjustment of suture thread tension, automatic speed change, automatic torque change, automatic needle replenishment, man-machine dialogue user programming, real-time tracking of sewing process, etc.; it can also complete several mechanical sewing machines on one mechatronic sewing machine. Completed work; it can save many parts that originally need to be controlled by mechanical mechanisms in a computer-controlled environment; the degree of automation is constantly innovating, which can greatly reduce worker operations.
      The electric control system is the key part of the electric control devi

The leather punching machine can change boards flexibly, save time for laying materials, double the efficiency, vacuum system, clean and tidy working environment, patented product, the first in the country. Mechanical punching, the leather is not black or smelly, and the self-developed numerical control system is more convenient to upgrade.
(1) Back-type gantry structure
        The unique fixed back type gantry structure is stable and strong, and the punch will not damage the ball screw. This excellent structural design can ensure that the equipment can be used for more than ten years. At the same time, the design also effectively reduces noise, making the working environment more comfortable.
(2) CNC precision machining
        The core components of the entire equipment are all precision-machined by CNC, and the tolerance of the equipment is within ±0.02MM, ensuring that the punching precision reaches ±0.1MM.
The structural parts of the punch rod use special materials to reduce friction and minimize wear. The company has invested a lot of energy in the research of materials.
(3) High-quality PMI grinding screw
       The transmission part of the machine adopts Taiwan PMI grinding screw, and the precision level reaches C3 level, which effectively guarantees the precision of punching. Our machines are targeted at mid-to-high-end customers, and the quality is naturally different with dif

Electric sewing machine is the perfect combination of traditional sewing machine and modern intelligent electronic technology. It is an essential sewing tool for modern housewives and garment sewing equipment for modern garment enterprises. It can help people complete sewing work efficiently and safely. Electric sewing machines are intelligent, lightweight, easy to operate, and safe. With the continuous development of industrialization, the current price of electric sewing machines is also declining. Electric sewing machines are the best alternative to traditional bulky conventional sewing machines.
Features
1. Straight line sewing (double thread) - with bottom line design, the sewing is more firm;
2. Curve sewing (can be used for double-thread seaming) -- see the figure for the shape, and you can easily complete the simple cloth seaming work at home, no need to find a tailor shop. (Note: Some buyers have reported that the shape of this seam seam is different from that of ready-made garments on the market. This is because the seam seam that is usually seen is processed by a special three-thread or four-thread seam seam machine, while the products in our store are double Thread. Although the shape is different, it can also achieve the purpose of sewing the fabric without losing its shape. Using simple double-thread seaming eliminates the trouble of using a special seaming machine for more than three threads, and reduces the manufacturing cost of the product itself.

There are two major difficulties in the computerized automatic sewing machine: first, the operation of picking up slippery and soft knitted fabrics piece by piece and placing them on the needle drop point; The method requires high technology and high cost.The semi-automatic sewing machine improves the above two difficulties of the automatic electric sewing machine. With the help of the operator's auxiliary operation, the placement of the sewing material is completed, and the most important thing is that the production cost can be greatly reduced.
Due to its high technical content and complex control system, automatic and semi-automatic sewing machines require a large investment in research and development, and relatively high prices. Mass production also depends on the cooperation of the social electronics industry and the provision of suitable components. In addition, there is a lack of technical talents engaged in mechatronics in the industry, especially those who are familiar with both sewing machine technology and microelectronics technology. These have become unfavorable factors for the development of automatic and semi-automatic sewing machine projects.
However, from the perspective of cost performance, automatic and semi-automatic sewing machines have been gradually recognized by the market due to their inherent advantages such as multiple functions, good performance, and high production efficiency. There is no doubt that automation and semi-automation sewi

Compared with ordinary sewing machines, the advantages of semi-automatic and fully automatic sewing machines are that they can perform some functions that cannot be accomplished by ordinary sewing machines. For example: automatic needle stop position, automatic stitching technology, automatic reinforcement sewing, automatic embroidery, automatic color-changing thread, slow start, mirror image transformation, pattern scaling, pattern rotation, additional seam starting origin, function display and other functions.
High degree of automation and intelligenceSemi-automatic and fully automatic sewing machines can automatically perform the set sewing work after detection and feedback according to changes in conditions during the sewing process. Such as: laser or infrared garment piece positioning, automatic edge sewing, automatic adjustment of suture tension for thick and thin sewing materials, automatic speed change, automatic torque change, automatic thread trimming, automatic needle mending, automatic presser foot lifting, man-machine dialogue user programming, sewing Process tracking, etc.
Expanded application range of sewing machinesAutomatic and semi-automatic sewing machines can simplify the work that is difficult to complete with ordinary sewing machines, and can use one machine to complete multiple processes.
Reduce the application of mechanical partsSince the semi-automatic and full-automatic sewing machines are controlled by computers, all the movements that n

From the perspective of the development history of sewing machines, people have always hoped to invent powerful sewing machines to replace ordinary sewing machines, free people from heavy labor, and solve the actual contradiction of labor shortage; from the development trend of sewing machines, there are two types of sewing machines: There are two trends: one is fully automated sewing equipment, and the other is semi-automatic sewing equipment; from the perspective of actual use, fully automatic sewing machines are not as advantageous as semi-automatic sewing machines in the fierce market competition; from a theoretical point of view, sewing machines The higher the degree of automation of the equipment and the easier the operation, the more popular it should be.

But the result given by the reality is: the demand for garment industry is ever-changing. Not only is the cost of fully automatic sewing machines too high, but its scope of application is often limited by the garment process, and its advantages cannot be brought to the extreme. So some people will utilize other sewing tools and equipment.
On the other hand, semi-automatic sewing machines have strong adaptability to garment technology, and the cost is relatively low, within the range that users can afford. Therefore, they have been widely welcomed by customers such as garment enterprises in recent years.
Features of automatic sewing machineAs we all know, the sewing machine can automatically complete t

A sewing machine generally consists of a machine head, a platen (base) and a frame. When sewing, the stitches are formed by 4 mechanisms in the machine head: firstly, the stitching mechanism penetrates the sewing needle into the sewing material; secondly, the hooking mechanism hooks the sewing thread on the needle under the sewing material Make it self-connected, or interweave or interconnect with the shuttle thread below; then the thread take-up mechanism tightens the thread; finally, the feeding mechanism pushes the sewing material a certain distance to complete the stitch formation process. The actions of these four mechanisms are closely coordinated. Therefore, the sewing machine is a semi-automatic precision machine.
Quality Requirements and TestingThe sewing machine is first required to be able to sew smoothly during use. When sewing within the range of the specified speed, stitch length and the thickest sewing material, there will be no thread breakage, needle breakage, seam leakage, stitches that are not tight and seam seams. Crepe and other faults can still be sewed smoothly when suddenly jumping from the thinnest sewing material specified to the thickest sewing material; secondly, under the specified sewing length, the linearity of the seam, the slippage between the upper and lower layers of sewing material, The consistency of the stitch length does not exceed the specified index, and each mechanism should have the specified performance; the third is to specify

According to the purpose, it can be divided into domestic sewing machine, industrial sewing machine and service industry sewing machine in between; according to the driving mode, it can be divided into hand, pedal and electric sewing machine; according to the sewing stitches, it can be divided into Handstitch, bartack stitch, single-thread chainstitch, double-thread or multiple-thread chainstitch, single-thread or multiple-thread covering chainstitch and multiple-thread covering chainstitch sewing machines.
During the sewing process, every time the needle of the sewing machine passes through the sewing material twice, the unit formed by the stitches at its spacing is called a stitch. Many consecutive stitches make up a seam. According to the Chinese national standard GB4514-84, there are 88 kinds of stitches in six categories. Among them, 100 types are single-thread chain stitches, with 7 types in total; 200 types are imitation hand sewing stitches, with 13 types in total; 300 types are double-thread or multi-thread lock stitches, with 27 types in total; 400 types There are 17 types of double-thread or multi-thread chain stitches; 500 types are single-thread or multi-thread chain stitches, and there are 15 types; 600 types are multi-thread covered chain stitches (also known as stretch seams) Stitch), there are 9 kinds in total. Typical stitches include single-thread chain, double-thread lock, double-thread chain, three-thread edging chain, and double-needle four-thread co