| you are: the Organization of paint and varnish works
Motor vehicles are maintained in the diversified conditions; their covering is exposed to influence of solar beams, snow and a dust. At the same time cars decorate streets of cities, therefore high demands are made to their colouring.
The Most difficult and labour-consuming is to preparations of a surface of bodies as the last collect and weld from separate stamped details. The poet »preparation of a surface of a body begins with rihtovochnyh the operations, which purpose to smooth defects of a surface after assemblage and welding. The major operation rihtovki is proparivanie separate roughnesses and spot welding places svintsovo-olovjanistym replaced partially plastic.
A body Surface preliminary smooth out, delete from it traces of scale, corrosion, vypleski weldings. Further it heat up to occurrence of golden-yellow colours pobezhalosti (that corresponds 160-180°С). On nagretuju a surface a gas-flame dusting by means of the special device put several thin layers plastic; each layer condense with a steel shovel. The raised dust plastic after cooling prepare grinding circles.
Only an insignificant part of a body process solder. After drawing of solder and plastic a surface prepare grinding circles, process rnhtovochnymi saws and a skin.
The Subsequent operations are degreasing of a surface of a body, washing by water, bonderizatsija, washing by water after bonderizatsii, passivirovanie in 9 solution of chromic anhydride (on purpose to improve protective properties and durability of a phosphatic film), drawing of a ground and its drying.
Body Priming is responsible and difficult operation. A ground put in the various ways. Long results are given by the combined method: priming of a bottom of a body okunaniem in a bath and pneumatic dispersion of other surface. As it was already mentioned, all takes root priming by electrosedimentation more widely.
|