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The storage of a powder
the storage of a powder has a great impact on its quality. Storage powders are generally ventilated and dry, and the temperature of the storage space should not exceed 30 degrees.
different varieties of powders can not be placed together to avoid mutual pollution
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. Different manufacturers of powder, in the construction, powder must be recycled, that is to say, a batch of used and then used the next batch, not used up powder must seal the box, so as not to be contaminated.
II Construction environment
powder construction units have different environmental requirements, there are open-air closed, there and production workshop, a large number of.
the correct powder construction environment should be independent and equipped with powder recovery equipment. Do not place unused powder in the spray chamber. Clean the floor thoroughly with a cloth or vacuum cleaner after work every day before and after work. Dust concentration in the spray chamber should not be too large. First of all, it is not good for human health, and then it is important that a certain concentration of powder in a certain space will produce an explosion, which is very dangerous. Because the main components of powder are chemical raw materials, flammable, spray room must be prohibited fireworks.
of the third powder and the treatment of
(1) powder in the oven beyond the specified time and temperature is likely to surface loss. Epoxy polyester (in-house) powder generally has a constant temperature of no more than 190 degrees. Pure polyester powders generally have a constant temperature of no more than 220 degrees.
the time it takes to place in the furnace varies depending on the heat required by the material. For example, aluminum, thin iron plate, etc. in the furnace placement time generally does not exceed 15-20 minutes. Large metal parts, etc. are generally placed in the furnace for 30-60 minutes.
(2) in the construction to reduce waste, the recovery powder added to the new powder mixed use, this situation often results in the surface of the work piece lost light. The correct method is a powder (normal) added about 3 kg, generally should not exceed 5 kg, otherwise lost light.
(3) powder is blocked due to high temperature or excessive extrusion. This condition tends to blind the powder. This situation is usually solved by treating the lump powder with a sieve and then using it in combination with the unstred powder.
(4) powders from different manufacturers are mixed with each other, and interference with each other can also cause the powder to lose light. If powders from different manufacturers are required, the powder supply barrels, spray guns, powder tubes and surroundings of the electrostectrectorectorist generator must be cleaned and switched to another powder.
(5) powder should not be stored too long. Too long will occur gloss changes, generally high gloss powder, storage time is too long, after construction often some powders will also produce the phenomenon of loss of light. Low gloss powder, such as black no light, gray no light, etc. , storage time is too long to use is likely to have the phenomenon of ripple sand.
(6) transparent powder on other powder interference, in the construction as long as you have used transparent powder, want to change other powder must be clean and thorough gun, powder bucket, spray room clean up.