Corona discharge equipment, a national patent product, is suitable for surface pretreatment of silicone rubber, plastics and other materials, and is currently used in vacuum electroplating, vacuum coating, sputtering, PVD, physical vapor deposition, printing, pad printing and so on.
Pretreatment of printing, gluing and coating. Mobile phone case, mobile phone keys, P+R keys, notebook computers, car lights, automobile interior parts, glasses, household appliances, cosmetics packaging containers, washing products packaging containers, plates and films of various materials, paper, fabrics, artificial leather, metals and other products are used for painting and pre-printing treatment.
Corona processor is commonly known as corona machine, electronic impact machine and electric spark machine in packaging industry. Technically called dielectric barrier discharge. Mainly used for surface treatment of plastic film or plastic plate products. Before ink printing, compounding, film blowing, coating, gluing, material modification, grafting, polymerization, coating, casting and pasting, in order to make the product surface have stronger adhesion (i.e. higher Dyne coefficient), the phenomena of printing fading, unstable compounding and pasting and uneven glue leakage in the production process of raw materials are prevented.
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Parameters and characteristics of attention function of corona machine
Corona machine is divided into different structures according to the shape of the object to be treated, but the electrical control part is basically the same. Film corona processor is suitable for surface wetting tension treatment of PP, PE, PS, PET, PA, PVC, BOPP, OPP, PT and other materials. The invention is suitable for treating the surface wetting tension of aluminum foil, aluminized film and other materials, plates and sheets; Plate corona processor is suitable for wet tension treatment of PS, ABS, PP, PE and other plastic plates; Three-dimensional curved surface corona processor is suitable for surface wetting tension treatment of various anisotropic plastic parts; The cup corona processor is suitable for the surface wetting tension treatment of cups, hoses and sheets made of various plastics, paper and other materials.
At present, the main engine of corona machine adopts stable, advanced and reliable imported high-power IGBT modules and devices as main circuit components, and the main components of control, trigger and display circuits are all composed of integrated block circuits with digital display, which makes its equipment very safe and reliable, durable, with low failure rate, and has the advantages of automatic protection such as overvoltage, overload, overcurrent, short circuit and stall, which is a popular trend in corona field at home and abroad. Because of the use of IGBT, the product has the advantages of simple structure, simple circuit connection, reliability and efficiency, small volume, simple use, one-button operation, modular structure, convenient maintenance and low price.
High-voltage transformer adopts oil-immersed high-voltage transformer, and the aluminum alloy shell is cast and pressed, which has beautiful appearance, good internal heat dissipation effect, durability, no rust and no oil leakage.
In order to effectively prevent the corona roller from stopping and the long-term impact of corona sparks on the film layer and silicone layer, the product must have the function of stopping the protection device, which not only effectively prevents accidents, but also greatly prolongs the life of the silicone layer of the corona roller (tube), thus effectively reducing the expenses of daily maintenance and wearing parts.
Corona electromechanical control part is divided into single-phase 220V/50Kz power supply and three-phase 380V/50Kz power supply according to power. The power is 1KW-60KW, the output frequency is 15 khz-25 khz, and the output voltage should be continuously adjustable within the range of 0- 15KV. It also has load corona shaft stop protection, electrode frame opening protection and load breakdown protection. The power of equipment with 220V/50Kz power supply is generally 1KW-6KW, and that of equipment with three-phase 380V/50Kz power supply is generally 6KW-60KW.
There are three ways to adjust the output power within the rated power range, all of which are stepless and gearless. One is to control the power by changing the frequency based on the frequency modulation principle, the other is to adjust the output power by adjusting the pulse width with a fixed frequency, and the third is to form a bridge rectifier circuit with thyristors in the rectifier circuit, and to adjust the output power by controlling the conduction angle of the thyristors.
Its installation methods mainly include: hanging type, horizontal type, desktop type and floor type. Its structure can be divided into integrated type (the control part and the high-voltage transformer are in the same cabinet) and split type (the control part and the high-voltage transformer are independent and connected by wires), and the integrated type is rarely used at present.
220V/50Kz splitter size:
Main cabinet: 250 (width) ×200 (height) ×360 (depth) mm, transformer cabinet: 350 (width) × 300 (height) × 300 (depth) mm.
Weight: main engine: 8kg, transformer: 19kg.
Market price: 6800 yuan/set on average.
380V/50KHz Splitter Dimensions:
Main cabinet: 600 (width) ×600 (height )×1500 (depth) mm, transformer cabinet: 4 10 (width) × 320 (height) × 360 (depth) mm.
Weight: main engine: 55kg, transformer: 75kg.
Market price: to be determined
Corona machine with three-phase power supply;
Principle: Three-phase alternating current is sent to the three-phase bridge rectifier circuit through filter inductance, and then sent to the half-bridge inverter circuit composed of IGBT high-power module after voltage regulation by silicon controlled rectifier and capacitor filtering, which is converted into AC medium voltage with a frequency of about 20KHz, and then the high-frequency high voltage of 15KV and 20KHz is generated by the booster transformer and sent to the electrode frame.
Circuit features:
1 the main circuit, driving circuit and important components of high-frequency switching transformer of inverter in high-power IGBT power module. The integrated circuits of signal and control parts all adopt imported devices, which ensures the reliability of the whole machine.
The working frequency of the circuit changes with the change of load, and stable automatic frequency tracking and locking can be realized through the phase-locked circuit, which can reduce the current and voltage stress of the main loop power device and make it in the best working state.
With soft start function, it can prevent the pollution of power grid and the possible damage to the host caused by current shock generated by high-power start.
It has three-phase open-phase protection, wrong-phase protection, bridge arm direct short-circuit protection, over-current protection, over-temperature protection, inverter out-of-lock protection, load corona shaft stop protection, electrode frame open-circuit protection and load breakdown fire protection.
5. Load corona shaft stalling protection, and electrode frame open circuit protection function is optional. This function is to prevent the rubber shaft from being broken due to membrane breakage or other reasons, resulting in long-term discharge at the same position of the rubber shaft and breakdown of the rubber shaft.
Technical parameters:
1 input voltage: 380v 10% 50hz.
2 Maximum output voltage: 15KV
3 Maximum output power: 10KW
4 Working frequency: 20KHz
5 overall dimensions: control cabinet 600X600 1500.
Transformer cabinet 4 10X320X360
6 Weight: 135Kg (control cabinet+transformer cabinet)