Craft of spray of pulverous and electrostatic surface and its benefit are analys

<P><FONT&nbspface=Verdana> &nbsp 2, besmear of pulverous and electrostatic surface installs technological process: &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp pre-treatment: &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp and groovy solvent spray technology are basic and same, can use chemical pre-treatment to board gold stamping workpiece law. Namely: Go oily → goes becoming rusty → cleans → phosphor to change (or rarefied) etc. Major rustily or the work with deeper surface, use spray arenaceous, cast the mechanical method such as bolus to become rusty, but after machinery divides rust, should ensure workpiece surface is clean, cannot dirty. Stand or fall of pre-treatment craft quality affects pulverous film quality directly, pre-treatment is bad, create film easy fall off, rouse the phenomenon such as bubble. Accordingly, pre-treatment job must give take seriously. Electrostatic surface besmear installs &nbsp<BR> powder: &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp passes high-pressured cable to introduce spray gun by the negative maximum pressure that electrostatic generator generates maximum pressure most advanced. Additional, the compression after purifying processing air, the course offers powdery keg, make powder passes powdery canal to come out from eject of spray gun mouth, the workpiece of current processing undertakes electrostatic spray through dusting room, the workpiece after spray sends carbonado (or oven) undertake solidify, powder of the rest in gush room drops into gush room partly, another part reclaims via dust catcher of tornado of the first class and hop-pocket of the 2nd class implement reclaim. &nbsp<BR> roast solidify: &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp basically is to make the workpiece classics after pulverous and electrostatic spray heats the oven of constant temperature or carbonado, it is according to pulverous character inside temperature time of the regulation solidify, make cross-linking reaction complete, produce smooth and compact film, be united in wedlock closely in workpiece surface. The powder with different <BR> is each are not identical on roast temperature and time, this should notice on solidify working procedure. &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp 3, the economic analysis of craft of outfit of besmear of pulverous and electrostatic surface: &nbsp</FONT></P>
<P><FONT&nbspface=Verdana> &nbsp uses besmear of pulverous and electrostatic surface to install taller than economic benefits of spray paint craft, product quality is good, besides paint of pulverous on coating eligible prep above. But pulverous spray utilization rate is as high as 95% ; Spray paint utilization rate is low, be in only 60% the left and right sides. Pulverous spray craft is simple. Man-hour charge also decreases greatly. If pre-treatment is inside 24 hours with respect to spray, but leave out phosphor changes processing. Field, equipment can decrease. The spray paint of n prep above of pulverous spray, generally speaking: Spray paint reject, defect rate is 10% the left and right sides. And gush model for 1% the left and right sides, advantageous reduce cost, repair rate is low, operating period is long. Dustbin processing uses half an year to be about repair. Change gush model processing to be able to be amounted to more than one year. The gas steel bottle of spray paint, qi Sheng is dropped after using a year rust is serious, after using gush model to handle function 2 years maintain basically unvarnished, so gush model than spray paint total cost wants to reduce, and quality is good, free from contamination. &nbsp</FONT></P>
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