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Shandong Runfa Precision Sheet Co., Ltd.
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| Development trend of color coating plate production technology |
| Admin：山东润发精密薄板有限公司 Time：2018/1/19 Read：6192次 |
Development trend of color coating plate production technology
1) the use of high quality substrates
The precision of the surface, shape and size of the substrate is higher and higher. Small zinc flattened hot-dip galvanized steel rolls are generally used for outdoor use, and the best use of zinc free flat hot-dip galvanized steel rolls; the trend of hot plating of zinc alloy in recent years is increasing. Galvanized steel coil can be used for indoor use. The cold-rolled plate is used for the film coating, and the sanitary ware is made of aluminum sheet.
2) improve the pretreatment process and pretreatment liquid. The number of devices is low and the cost is low. It has become the mainstream technology, improving the stability and corrosion resistance of pretreatment fluid. Korea has used Cr+3 pretreatment fluid. Japan has developed Cr+6 free pretreatment solution to improve environmental protection.
3) the development of anew paint
The general polyester, polyvinylidene fluoride (PVDF) and plastic sol were improved to achieve super color reproducibility, UV resistance, anti SO2 and corrosion resistance, and develop functional coatings, such as heat resistance and heat absorption.
4) the unit equipment is more perfect.
A uses a new type of welding machine. The weldability of the galvanized sheet is not good, and the stitching machine is used most of the unit. The MITSUBISHI motor has developed a galvanized sheet welding machine. The strip roller coating machine does not need to carry the coating roller, which avoids the damage to the roller surface in the strip stitching area and reduces the length of the leaking strip.
B new roller coating machine. The new type of single slide rail coating machine eliminates the error between the multiple roll system, and makes the coating more uniform by adding the doctor knife and the sensor. Developing roller curtain type flow coating machine. The coating flows into the 2 coating rollers. The thickness of the coating is decided by the gap between the coating rollers, the thickness of the film can be precisely controlled, the surface of the boards is not roller printed, and the surface of the color coated boards has a unique metallic luster. When the first coating is used, the roll coating is used, the curtain coating machine is used when the finishing coating is fine. The curtain of liquid coating is flowing to the surface of the steel strip, and the coated steel strip will not leave the roll mark.
C perfected the curing furnace. The air purification technology, adding fresh air inlet loading must be strictly filtering, filter efficiency and efficient filter, air filter after the dust content of <1.5mg/Nm3; the indirect combustion combustion system, using coke oven or mixed gas, central heating to the waste incinerator, will fill the air temperature heated to a high enough to each section, solidifying furnace, combustion products do not enter the oven; section temperature control technology, each section is also adjusting the temperature of hot air and cold air, hot air control system is provided with a set of, improve the thermal efficiency; using incineration flue gas preheating air, using regenerative heat exchanger technology, flue gas temperature of <200 (RTO) C.
5) development of cold embossing technology
Cold embossing is low in cost and is widely used in North America. The embossing machine is similar to the two roller temper mill. The upper and lower rollers are patterned, and the color plates are pressed and deformed. The leather, brick and granite patterns can be obtained through roll changing, which is beautiful, three-dimensional and high intensity. Cold embossing machine can set the line or lines, rolling up to 50t, speed up to 210m/min.
6) pay attention to the diversification, functionalization and upscale of the product
A deep drawing color coated plate. Based on the detailed analytical results of the deformation state of the coating during processing, a coating film corresponding to the compression deformation of the steel plate was developed, and the accurate resin design was developed, and the deep drawing color coated sheet with good adhesion and corrosion resistance was developed.
B "pomelo skin" color coated board. Several micron additives in the coating, the film is floating, color plate as small bump of the grapefruit skin surface, need precise control of bump formation of appropriate wavelength, together with the use of "coating" in the same appearance, grapefruit skin color coated surface of the defect is not conspicuous, very subtle.
C anti-static color coating board. It is widely used in office automation, video recorder and so on. The charged voltage of the coating can be reduced by 1/4, and the dust adhered to the color coated board is greatly reduced. During the processing and assembly, the process of wiping and duing can be reduced, and it still has good additivity, formability and drug resistance.
D resistant color coating plate. The refrigerator and other kitchen appliances should be resistant to oil, seasoning and detergent pollution. Developed a hard coating surface and internal flexible "tilt type coating, polyester resin with melamine resin hardening with increasing molecular structure density, film heating, surface hardening melamine accumulation, hard coating surface coating layer of melamine pollution, less flexible processing.
E high heat absorption color coated plate. High performance and miniaturization of electrical products, increase the heat load of electric appliance unit volume, the machine heat quickly and effectively escape. Endothermic coating color coated sheet through the special design of the resin, additive and pigment molecules, can absorb heat generated by the infrared, and go out through the plate dissipation, the temperature electric machine is reduced by about 10 DEG C, can save the electrical heat with wind, reduce the cooling hole.
At present China coating plate production has an unprecedented development, great achievements; but there are also many problems, such as tin substrate and electro galvanized plate production shortage; building materials hot galvanized, Caitu coating is too thin, poor product quality, disorderly market competition, will also face hot galvanized, Caitu production stage relative surplus and other issues in the future, we can only solve these problems, strengthen self-discipline, to integrate into the international market, to survive and develop in the competition. |
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