Method for coating short-arc xenon lamp with stable heat insulating coating

Abstract

The invention belongs to the field of heat insulating coatings, and provides a method for coating a short-arc xenon lamp with a stable heat insulating coating. The method comprises the steps that 1, a white coating and a silver coating are mixed according to the volume ratio being 1:1-3 and stirred to be uniform; 2, the portion, to be coated, of a side tube of the short-arc xenon lamp is wiped with ethyl alcohol, film pasting protection is carried out on a tail lead welding guide rod, then the portion to be coated is immersed into the coating liquid which is evenly stirred in the step 1 for 2-6 s and is slowly lifted out at the speed of 0.1-1.0 cm / s, and therefore the surface of the side tube is coated with an evenly-distributed heat insulation coating; 3, after 5-30 s of standing, the lamp tube which is coated with the coating is roasted at 250-350 DEG C in a heat drying oven till an organic binding solvent is slowly and completely evaporated. By means of the method, the coating with the clear color and luster can be obtained, and the defects of damping and cracking of coatings in the prior art are overcome.

Description

technical field [0001] The invention belongs to the field of heat-insulating coatings, in particular to a method for coating a short-arc xenon lamp with a stable heat-insulating coating. Background technique [0002] Short-arc xenon lamp, also known as short-arc xenon lamp or spherical xenon lamp, is a point light source with extremely high brightness. The color temperature is about 6000K, and the light color is close to sunlight. It is the light source with the best color rendering among gas discharge lamps. It is suitable for film projection, searchlight, train locomotive and simulated daylight, etc. With the advancement of short-arc xenon lamp manufacturing technology for movie projectors, the sealing method of mainstream xenon lamp manufacturers has adopted a transitional sealing structure. Due to the structural limitations of Christie movie lamp projectors, the anode side tube of the xenon short-arc lamp for Christie projectors cannot be sealed. Install metal lamp hold...

AI Technical Summary

Problems solved by technology

With the advancement of short-arc xenon lamp manufacturing technology for movie projectors, the sealing method of mainstream xenon lamp manufacturers has adopted a transitional sealing structure. Due to the structural limitations of Christie movie lamp projectors, the anode side tube of the xenon short-arc lamp for Christie projectors cannot be sealed. Metal lamp holder

Under the long-term reflection of high-temperature heat radiation by the reflector, it is easy to cause softening and cracking of the transitional sealing material, which affects the service life of the bulb

At present, heat-insulating coatings are widely used in the industry to prevent the transitional sealing structure from being directly irradiated by reflected light. Generally, the existing heat-insulating coating method is to directly paint the mixed paint on the side tube of the short-arc xenon lamp with a brush. The surface is then baked at about 100°C; the coating obtained by this method is not only uneven in thickness, but also prone to moisture return and darkening of color after normal storage. The problem of cracking and falling off, both of which affect the appearance of this type of bulb and the reliable use of the product