Evenly bepowdering method of helical tube

Abstract

The invention discloses an evenly coating method of a helical tube, adopting the following four measures: (1) conducting current, discharging residual slurry, and changing vertical rotation or inclined rotation into horizontal rotation, wherein the whole working procedure needs 7-9 minutes; (2) blowing or adsorbing and discharging survival residual slurry: after finishing the procedure of conducting current and discharging residual slurry, covering a hose on one end of a glass tube to blow or adsorb residual slurry at the frequency of 0.5-1 second / time and wind pressure of 0.2-0.3MPa; (3)drying: after the above two procedures of discharging residual slurry, entering a drying procedure, controlling temperature to be less than 110 DEG C and baking time of 6-9 minutes; and (4) performing horizontal rotation by the helical tube at constant speed in the whole course: in the above three procedures of conducting current and discharging residual slurry, blowing or adsorbing once to discharge residual slurry and drying, taking the central axis of the helical tube as a rotation axis by the helical tube, finishing operation at horizontal rotation at a constant speed of 40-70 seconds / turn. The helical tube is sprayed with powder with the above method, the purposes of even coating and no pulverized coal deposits can be realized so as to lower fluorescent powder consumption, save cost and improve the illuminating quality of the tube.

Description

technical field [0001] The invention relates to a powder coating method for an electronic energy-saving lamp tube, and is especially suitable for a powder coating method for a spiral lamp tube. Background technique [0002] Because of its spiral bending shape, the spiral lamp occupies a small space and can still ensure the effective length of the lamp. It is one of the main lamp forms in the current electronic energy-saving lamp. However, due to the existence of the lead angle of the spiral lamp tube, it is extremely difficult to apply the powder slurry evenly, and it is easy to form thick spots in the local area of ​​the tube cavity, resulting in powder accumulation. The uneven powder coating can be clearly detected by the appearance, which wastes fluorescent powder , affecting the uniformity and transmittance of luminescence. For this reason, the industry is constantly exploring and seeking breakthroughs in order to ideally solve the problem of uniform powder coating of s...

AI Technical Summary

Problems solved by technology

The rolling and rotation of the lamp tube plays two roles, one is to guide the flow to make the remaining slurry flow out, and the other is the flow of the remaining slurry in the tube itself is a powder coating process, and the inclined rolling is also due to the action of gravity, so that the remaining slurry flows in the glass tube. Uneven distribution, difficult to coat the tube evenly

The third step of the powder coating method of CN101071706 states that "tilt the spiral lamp tube with a small amount of phosphor powder slurry at a certain angle and make it in a rotating state", which is also a method of tilting and rolling. As mentioned above, tilting is beneficial to flow out the remaining material. slurry, difficult to spread