CN201054342Y

CN201054342Y - Laser selective separation CRT display screen device

Info

Publication number: CN201054342Y
Application number: CNU2007200846932U
Authority: CN
Inventors: 段军
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2007-05-11
Filing date: 2007-05-11
Publication date: 2008-04-30
Anticipated expiration: 2017-05-11

Abstract

The utility model discloses a device for selectively separating cathode ray tube display screens through laser. The device comprises a laser, an optical path guiding device, a focusing lens, a blow nozzle, a smoke absorbing pipe and a three dimensional revolving work table, wherein, the three dimensional revolving work table is used for positioning a waste cathode ray tube to be treated, the laser, the optical path guiding device and the focusing lens are positioned on the same optical path in sequence, and the smoke absorbing pipe is close to the blow nozzle. Because a laser beam only acts mutually with sealant but not glass material, the utility model can avoid the blowoff of the display screen caused by the inappropriate selection of laser separation technological parameters, does not need groove scanning by adopting a laser beam out of focus after laser grooving by adopting CO2, etc., has quick separation speed and high efficiency, and can obviously enhance the speed of separating the cathode ray tube display screen along with the increase of the laser power, without being limited by the blowoff of the display screen.

Description

The device of laser selectively separating cathode-ray tube display screen

Technical field

The utility model belongs to laser processing application, resource recycling and environmental protection technical field, is specifically related to a kind of device of laser selectively separating cathode-ray tube display screen.

Background technology

Early stage television set and computer screen all are made up of cathode ray tube, before some old or bad display screens are abandoned, must carry out environmental protection and recycling by the target ray tube, the inside and outside useful material of one side target ray tube, as reflect coil and grid and waste and old cathode ray tube glass etc., carry out the recycling resource.Especially not having leaded tube panel glass can make tube panel again again or be used for making the decoration brick and tile.Compare with standard clay manufacturing process, not only reduce emission amount of carbon dioxide but also reduce cost of manufacture, thereby have the enormous and latent market economic benefit and the value of environmental protection.In addition, use the test of waste and old cathode ray tube glass development foam glass, add the pipe awl, manage to bore and made foam glass product with tube panel, tube panel respectively.Foam glass is a kind of environment-friendly type heat-insulating material, it is to be primary raw material with the cullet, add blowing agent, modifier and promoter,, form batch through pulverizing, mixing, put it in the heat-resisting mould, through the porous glass material that preheating, fusion, foaming, annealing process are made, its good flame resistance, water absorption rate is low, dimensional stability is good, can be used for the cold insulation of building roof, external wall outer insulation, cryogenic piping, container etc.As roof, wall heat insulation material, construction cost be about 110-120 unit/square metre, suitable with prices such as polystyrene, foamed plastics.Heavier is on average to contain 4～8 ounces of lead that prevent that electromagnetic field radiation from going out in each television set or the computer CRT display screen.Will make lead enter soil and the severe contamination water source in the soil if directly pulverize display screen and imbed, harm humans, plant and microbe also can be caused great influence to children's brain growth the most at last.Therefore, the poisonous and hazardous material in the cathode ray tube correctly must be handled, to avoid polluting biological environment on every side.Along with the continuous development of present science and technology, these display screens of being made up of cathode ray tube will progressively be replaced by power saving space-efficient LCDs, certainly will will have a large amount of CRT display screen to be eliminated.To have 150,000 tons of discarded CRT display screen to need to handle every year in Europe, only just have every year the discarded CRT display screen of 2 kilotons (about 250,000) effectively to handle in Finland, reach the purpose of the resource of recovery and the environment of preserving our planet.China is maximum in the world household electrical appliances producing country and country of consumption.According to statistics, at present China only the social recoverable amount of television set be 3.7 hundred million, and be mostly that the middle and later periods eighties 20th century enters family, according to calculating the useful lifes in 10 years to 15 years, stepped into now and scrapped the peak period.In addition, China also has nearly up to ten million computers to enter the phase of eliminating at present.From 2003, China had at least 5,000,000 television sets and 5,000,000 computers to scrap every year.And the huge cathode-ray tube display of these numbers of safe handling how but is a problem demanding prompt solution.

The external at present waste and old cathode ray tube display screen main method of handling is to manage the display screen of sealing is separated from tube panel and pipe awl junction, clear up display tube up hill and dale and contain plumbous harmful substance, and then the recycling of classifying, thereby reach the purpose of not only environmental protection but also recycling resource.Obviously how cutting display screen is that one of waste and old cathode ray tube display screen key technology is recycled in environmental protection.Adopt resistance wire around tube panel and pipe awl junction in Germany, the glass below the strong heat heater that the energising back produces by resistance wire cracks it tube panel and pipe awl is separated (United States Patent (USP): No.6,089,433 along crackle under the thermal stress effect; Deutsche Bundespatent: DE4295404 and German patent DE 4234706).But the method speed is slow, and efficient is low, and display screen is easy to because of heating the inequality explosion.In addition two kinds of methods are to adopt water under high pressure to annotate the cutting and separating method and diamond blade water cooling cutting and separating method is used (United States Patent (USP): No.6,186,848, Deutsche Bundespatent: DE4003497 and Deutsche Bundespatent: DE3901842) in Germany and Japan.But these methods can cause too much water resource waste and water and cut that the ground-slag end is mixed in together will pollute operational environment, thereby must clear up at any time, just can carry out further work.In addition, the diamond tool pad wear comparatively fast also causes higher cost.Finland adopts CO recently ₂Laser paddle-tumble separation method is cut apart waste and old cathode ray tube display screen (United States Patent (USP): 20050020178).Its principle be utilize can with the interactional CO of glass material ₂Laser beam (optical maser wavelength is 10.6 microns) is along the scanning heating of tube panel place and remove the segment glass material, forms one around the CRT display screen narrow trenches in one week.If it is suitable that parameter is selected, need not other means, display screen will split automatically along narrow trenches.This method is compared with above certain methods, and it is fast to have speed, and the efficient height pollutes advantages such as operational environment is few.Yet, adopt CO ₂Separation also has some special problems to laser to the display screen paddle-tumble; As having some pores or impurity at tube panel and pipe awl junction; the non-symmetrical geometries of periphery; the variation of thickness of glass size and glass material bring destabilizing factor on an equal basis all can not for this method, also need other supplementary means to assist to cut apart usually, as at CO ₂Adopt the laser beam flying groove of out of focus after the laser paddle-tumble again, adopt vortex tube to carry chilled air cools groove both sides simultaneously in the laser beam both sides, form the huge temperature difference, produce bigger stress and assist to cut apart CRT display screen.Obviously, increase supplementary means and assist to cut apart speed and the efficient and the cost that will influence this method.In addition, CO ₂Laser paddle-tumble separation method needs the minimum heart to select the technological parameter of laser paddle-tumble in the paddle-tumble process, otherwise very easily because of thermal unbalance causes explosion, causes and separate failure.Especially separate large-size and almost can't avoid causing because of thermal unbalance the problem of explosion during than the CRT display screen of heavy sheet glass at paddle-tumble, its reason is CO ₂The little institute of long and conductive coefficient glass of the glass material interaction time of laser beam and CRT display screen causes that localized heat stress is too concentrated, thus produce thermal stress uneven excessive due to.This also is CO ₂Laser can only adopt paddle-tumble to separate and the reason place that can not adopt the cutting and separating CRT display screen.

Summary of the invention

In order to overcome above defective, the utility model provides a kind of device of laser selectively separating cathode-ray tube display screen, and this device can not cause the display screen explosion, and separating rate is fast.

The device of the laser selectively separating cathode-ray tube display screen that the utility model provides comprises laser, light path guider, condenser lens, blow-out nozzle, Smoking pipe and three-dimensional rotation workbench; The three-dimensional rotation workbench is used to place pending discarded cathode ray tube, and laser, light path guider and condenser lens are positioned on the same light path successively, the light shaft coaxle of blow-out nozzle and condenser lens, and Smoking pipe is near blow-out nozzle.

Said apparatus also can replace the three-dimensional rotation workbench with three-dimensional working platform and rotary table, and light path guider and condenser lens are positioned on the three-dimensional working platform, and rotary table is used to place pending discarded cathode ray tube.

With CO ₂Laser paddle-tumble separation method is compared, and the technical scheme that the utility model provides has following advantage:

(1) only interacts and do not interact owing to laser beam, so can avoid selecting the improper display screen explosion that causes because of the technological parameter of separation by laser with glass material with fluid sealant.

(2) do not absorbed or absorb seldom owing to optical maser wavelength by glass, therefore, in separation by laser cathode ray tube process, no matter tube panel size and thickness of glass and the laser beam and the interactional time length of fluid sealant of display screen can not cause that the difference of the pressure that bigger thermal stress is uneven or inside and outside causes explosion.

(3) because the fusion temperature of fluid sealant is lower than the fusion temperature of glass, minimum of required laser power needs about 200W, and need not any gas consumption in separation process, and available technology adopting CO ₂Laser, lowest power need kilowatt more than, constantly consume working gas CO during work ₂, N ₂And He, so the utility model can adopt the low laser apparatus of cost, and its job costs are low.

(4) CO ₂Adopt the laser beam flying groove of out of focus behind the laser paddle-tumble again, adopt vortex tube to carry chilled air cools groove both sides in both sides simultaneously in the laser beam both sides, form the huge temperature difference, produce bigger stress and assist divided display.The utility model adopts laser beam directly to melt and burn sealant material, need not to adopt supplementary means, so technology is easy, separating rate is fast, the efficient height.

(5) can significantly improve the speed of separating cathode-ray display screen along with the increase of laser power, and can not be subjected to the restriction of display screen explosion.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model device

Fig. 2 is the structural representation of the another kind of embodiment of the utility model device

Fig. 3 is 17 very short time of separation by laser graph of a relation between laser power and the maximum laser combustion speed during extreme ray pipe.

Embodiment

It is the characteristics that formed by tube panel and the adhesion of pipe awl static seal glue material that the utility model method is utilized CRT display screen, adopt laser beam only to interact with fluid sealant and not with the interactional selectivity technology of glass material, reach the purpose of separating cathode-ray tube display screen.Its basic principle is to select for use glass not absorb or absorb seldom laser beam wavelength scope, for example adopt visible wavelength and near-infrared wavelength, can see through glass and not with the glassy phase mutual effect, but this laser beam can be connected the tube panel of display screen and the fluid sealant of pipe awl absorbs.When on the fluid sealant of laser beam irradiation in the junction, laser beam does not interact with glass material, and only interact with sealant material, and fusing and burn sealant material, thus reach the tube panel of separating cathode-ray display screen and pipe awl and the purpose of molten glass not.

The utility model device, as shown in Figure 1, the utility model device is made up of laser 1, light path guider 2, condenser lens 3, blow-out nozzle 5, Smoking pipe 4 and three-dimensional rotation workbench 6.

Three-dimensional rotation workbench 6 is used to place pending discarded cathode ray tube 9.Laser 1, light path guider 2 and condenser lens 3 are positioned on the same light path successively, the laser beam that laser 1 sends is behind light path guider 2 and condenser lens 3, focus on the tube panel 11 and the fluid sealant 8 between the pipe awl 10 of the cathode ray tube on the three-dimensional rotation workbench 69, blow-out nozzle 5 is with coaxial through condenser lens 3 emitting laser bundles, and Smoking pipe 4 is near blow-out nozzle 5.

During work, discarded cathode ray tube 9 is placed on the three-dimensional rotation workbench 6, the laser beam that is sent by laser 1 is incident to condenser lens 3 through light path guider 2, behind the line focus lens 3, focuses on the tube panel 11 and the fluid sealant 8 between the pipe awl 10 of cathode ray tube 9.Three-dimensional rotation workbench 6 drives the mobile and rotation on the xyz axle respectively of discarded cathode ray tube 9, and laser beam all melts fluid sealant 8 or burns, and Smoking pipe 4 and blow-out nozzle 5 are removed fluid sealant 8 burnings and melted smog and the residue that produces simultaneously.

The utility model device also can adopt structure as shown in Figure 2, and light path guidance system 2 and condenser lens 3 place on the three-dimensional working platform 12, and rotary table 13 is used to place discarded cathode ray tube 9.The laser beam that is sent by laser 1 is incident to condenser lens 3 through light path guider 2, and line focus lens 3 focus on the tube panel 11 and the fluid sealant 8 between the pipe awl 10 of cathode ray tube 9.Three-dimensional working platform 12 drives light path guidance system 2 and condenser lens 3 moves on the xyz axle, rotary table 13 drives 9 rotations of discarded cathode ray tube, laser beam all melts fluid sealant 8 or burns, and Smoking pipe 4 and blow-out nozzle 5 are removed the smog and the residue of fluid sealant 8 burnings and fusing generation simultaneously.

After fluid sealant 8 all melts or burns, the tube panel 11 of cathode ray tube 9 will separate or be easy to be separated by the method for craft with pipe awl 10 automatically, as rap tube panel 11 with mallet, tube panel 11 will break away from pipe awl 10, reaches the purpose of the tube panel 11 and the pipe awl 10 of separating cathode-ray tube 9.

Example 1:

The 408-2 type Nd:YAG laser that the utility model adopts U.S.Laser Corporation to make, output wavelength is 1064 nanometers, power output is that 200W is to 1000W, Jiao's length of condenser lens is 100 millimeters, be used for 14 cun of Selective Separation to the tube panels and the pipe awl of 37 very short time extreme ray pipes, and the thickness of fluid sealant is 10 to 13 millimeters.The result proves that the much and fast slowness of laser beam translational speed of power can not make the cathode-ray pipe explosion, so when this technology is used for separating cathode-ray tube, less demanding to the technological parameter selectivity.Fig. 3 has represented that 17 very short time of separation by laser is during the extreme ray pipe, relation between laser power and the laser combustion fluid sealant speed, as can be seen from the figure, raising along with laser power, the increasing degree of laser combustion speed increases, this is owing to increase along with laser beam injects power, and fluid sealant not only is excited directly effect but also be subjected to the effect of the heat that heat conduction comes, the cause of accelerated combustion speed of light beam.Obviously, improve the production efficiency that laser power will help to improve the separation by laser cathode ray tube.

Example 2:

The high-power diode laser ROFIN DL028Q type that employing is made by German Rofin-Sinar Laser, output wavelength is 808 nanometers, power output is that 300W is to 2800W, focusing on the printing opacity spot size is 0.8 * 1.3mm, be used for 14 cun of Selective Separation to the tube panels and the pipe awl of 37 very short time extreme ray pipes, and the thickness of fluid sealant is 10 to 13 millimeters.Cutting and separating speed can reach 250mm/s.

Example 3:

The high power fiber laser YLR-10000 type that employing is made by German IGP Laser, output wavelength is the 1070-1080 nanometer, output rated power is 10000W, Jiao's length of condenser lens is 100 millimeters, focusing on the printing opacity spot diameter is 0.2 millimeter, be used for 14 cun of Selective Separation to the tube panels and the pipe awl of 37 very short time extreme ray pipes, and the thickness of fluid sealant is 10 to 13 millimeters.Cutting and separating speed can reach 1500mm/s.

Protection range of the present utility model is not limited to above-mentioned example, and persons skilled in the art can adopt other multiple mode to realize the utility model according to above-mentioned disclosure.

Claims

1. the device of a laser selectively separating cathode-ray tube display screen, it is characterized in that: this device comprises laser (1), light path guider (2), condenser lens (3), blow-out nozzle (5), Smoking pipe (4) and three-dimensional rotation workbench (6);

Three-dimensional rotation workbench (6) is used to place pending discarded cathode ray tube (9), laser (1), light path guider (2) and condenser lens (3) are positioned on the same light path successively, the light shaft coaxle of blow-out nozzle (5) and condenser lens (3), Smoking pipe (4) is near blow-out nozzle (5).

2. the device of a laser selectively separating cathode-ray tube display screen, it is characterized in that: this device comprises laser (1), light path guider (2), condenser lens (3), blow-out nozzle (5) Smoking pipe (4) and three-dimensional working platform (12) and rotary table (13);

Rotary table (13) is used to place pending discarded cathode ray tube (9), light path guidance system (2) and condenser lens (3) are positioned on the three-dimensional working platform (12), laser (1), light path guider (2) and condenser lens (3) are positioned on the same light path successively, the light shaft coaxle of blow-out nozzle (5) and condenser lens (3), Smoking pipe (4) is near blow-out nozzle (5).