The plastic detonating tube is a blasting equipment put into use in the early 1980s in China. After more than 30 years of promotion and use, it has become the mainstream detonating equipment for blasting operations in China. With the increasing proportion of non-electrical detonation network applications, the use of detonating tubes has continued to increase, with annual usage reaching more than 3 billion meters. In the process of use, the field of engineering blasting hopes that the detonating tube has high tensile strength, little influence by fuel oil, easier network connection, high temperature resistance, softer and more wear-resistant tube, and good cutting quality. stable. However, at present, the production process and equipment of the detonating tube in China are relatively lagging behind, and the production process is still in the stage of extensive plasticization and labor-intensive. Therefore, it is worthwhile to consider the quality control in the production process of the detonating tube. Since the plastic detonating tube is more flexible, the contact measuring method is not suitable for the current outer diameter detection, and most of the current production equipment is an automatic production equipment, so the automatic detection of the outer diameter thereof becomes a non-negligible The problem. Therefore, the basic requirements for the detection of the outer diameter of the plastic detonating tube are as follows: non-contact, online, automatic, high precision, high speed. The diameter of the plastic detonator is controlled by the die of the extruder. The annular die for extruding the detonating tube is constituted by a circular gap formed between the die core and the die seat. According to the direction in which the plastic melt flows, the die is divided into two parts, a compression section and a molding section. The annular gap area of ​​the compression section is from large to small. The forming section is also called a straight section, and the inner and outer surfaces of the mold base and the core are cylindrical surfaces, and the gaps are equal. Therefore, the center line of the die holder and the core are strictly coincident to ensure the consistency of the diameter of the detonating tube and the consistency of the wall thickness. The center line coincidence adjustment of the die holder and the core can generally fix the mold base, the method of adjusting the core, and the method of fixing the mold core and adjusting the mold base. On the basis of the original equipment, an optical caliper that can control the upper limit of the pipe diameter is added, so that the maximum diameter of the drawn detonating pipe does not exceed the specified value, which meets the requirements of national standards, and the outer diameter of the detonating tube is controlled and controlled by the machine equipment. The lower limit avoids the problem that the equipment is out of time during the production process and the equipment is time-consuming due to the long running time of the equipment and the time after the shutdown. At present, China's detonating tube diameter has been realized online. By using photoelectric caliper to achieve on-line accurate measurement of outer diameter size, the instrument has fast response speed and high precision, and can accurately detect the diameter of the detonating tube of the tested plastic. Dimensions, at the same time it is an online measuring system, non-contact detection, measuring accuracy can reach 0.003mm, measuring frequency also reaches 500Hz (and can be made 1000Hz), providing accurate wire diameter for plastic detonating tube. The photoelectric caliper also has a PID adjustment function, which is to control the screw speed of the extruder or the speed of the tractor according to the deviation between the measured wire diameter and the set nominal value, so that the actual wire diameter is as close as possible to the nominal value. For the plastic detonating tube, it can be docked with the drawing machine or the extruder to realize the automatic control of the pipe diameter. Conclusion The CCD-based photoelectric caliper is applied to the on-line detection of the outer diameter of the plastic detonating tube. It has the characteristics of high measurement accuracy and high speed, and is also a non-contact automatic detection device. At the same time, it has the function of outer diameter out-of-tolerance alarm and size control, which brings great convenience to the quality monitoring of plastic detonating tube. It is the best testing equipment to meet the online diameter detection of high-precision plastic detonating tube production line. PCB Spring Terminal Block Section
PCB Spring Terminal Block
It is a new type of terminal block with spring device, which has been widely used in the world's electrical and electronic engineering industry: lighting, elevator lifting control, instruments, power supply, chemistry and automobile power, etc.
Spring type terminal block PCB Spring Terminal Block ShenZhen Antenk Electronics Co,Ltd , https://www.antenksocket.com
Spring type PCB terminal, the connection mode is divided into cage spring connection and butterfly spring connection, which is fast and convenient for wiring and improves the operation efficiency.
It can be used to connect all types of conductors with cross-section of 0.2mm to 16mm, with spacing of 2.5mm-15.0mm.
Outer diameter measurement during production of plastic detonating tube
introduction