Several problems needing attention in the hottest

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Several problems that should be paid attention to in aluminum alloy spraying operation

production of fixture and selection of feeding method. The clamps hung at both ends shall be able to bear the pressure of considerable weight; The size of the contact point between the fixture and the outer surface of the profile shall be minimized during the manufacturing and use of the fixture used in the middle part, and the hanging rod placed vertically in the middle part shall be powdered in time

the hanging position in the hanger of aluminum alloy profile should also follow the corresponding principles. For some profiles with deep grooves, increasing the powder amount and pushing the distance between the spray claw and the profile are applicable; The surface with large surface area or complex structure shall not be placed in the downward position, and the decorative surface and non decorative surface of the profile shall be distinguished at the same time

for some aluminum alloy profiles with special shapes, adjust the position of the fixture in time to maintain a certain tilt angle at the position of the hanger, so as to enhance the stability during operation and facilitate powder adsorption

in addition, for some heavy profiles, when using the fixture in the middle position, the elbow part should have a certain radian. The radian of the fixture can ensure that the aluminum alloy profile is in the vertical position and ensure the smooth production process

in addition, with the increase of recycling times, the coating film will accumulate more and more. The coating itself is non-conductive, which will affect the conductivity of the conductive beam and hanger, and then affect the uniform distribution of powder on the surface of aluminum alloy profile. The coating on the conductive beam and hanger should be removed in an appropriate way

the pretreatment process is simpler than the ordinary pretreatment process before oxidation, mainly degreasing and chromizing, with low raw material consumption and relatively easy daily maintenance

in order to improve the production efficiency and reduce the energy consumption in the drying process during the pretreatment process, large material racks are used to load as many profiles to be treated as possible. For some aluminum alloy profiles with soft texture, the cross bar should be placed in the middle of the aluminum alloy profile, and the groove part should be placed upward as far as possible, which is conducive to the evaporation of water

when there is still water left after the drying process, in order to avoid damaging the chrome film on the surface of the aluminum alloy profile and the profile is easy to deform when the temperature is too high, it should not be baked in the furnace, and the method of cool drying or air gun (no oil and gas) drying can be used

in addition, the profile must maintain a proper tilt angle in the process of entering and leaving the slots and dripping dry, but it is easy to provide the main and continuous driving force for the expansion of China's construction machinery property, causing some profiles to slip. A piece of stainless steel wire should be bound at one end of the rack as a preventive measure

problems needing attention in the spraying room: before formal powder spraying, you can try spraying several times. At this time, you can observe the low thickness of powder and the uniformity of powder distribution at both ends of the spraying room. At this time, the powder runs in a straight line within 10cm from the end of the spray claw, and the other part exists in the form of atomized powder. The powder adsorbed on the surface of the profile is actually this. Our current research on graphene should start from the characteristics of its material itself. A powder with atomization effect is used as the standard to control the distance between the spray claw and the profile

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