aluminum profile and production process
aluminum performance requirements
a. aluminum profiles
1. if the following kinds of alloy and the combination of hardness conforms to the provisions of the production and processing, surface treatment and performance requirements, can be used to make aluminum: 6063 - t5, 6063 - t6, 6063 - t5, 6061 - t6. if other 6 xxx series alloy to the provisions of this technical requirement can be submitted for approval. the thickness of the aluminium profile to meet performance requirements on the basis of not less than the following requirements:
a. the main: 3.0 mm.
b. the perimeter of the glass cover and non-structural decoration: 1.5 mm.
c. all aluminum must be advanced products used in construction, its tolerance machining error should meet the gb/t 5237 - aluminum alloy construction profiles of provisions. its material should reach the gb/t 3190 - deformation of aluminum and aluminum alloy chemical composition.
d. all aluminium profile should be submitted along with all the attached mould figure shows that meet the requirements of the above materials, wall thickness, and archived.
2. if the following kinds of alloy and the combination of hardness comply with the provisions of the processing, surface treatment and performance requirements, usable and make aluminum or aluminum: 3003 - h14, 5005 - h14. other 3 xxx, if 5 or 6 xxx xxx series alloy to the provisions of this technical requirement can be submitted for approval. sheet should be consistent with the requirements of the gb/t 5237. the thickness of the plate to meet the performance requirements on the basis of not less than the following requirements:
a. aluminum molding components: 3.0 mm.
b. unless special construction drawings requirements, aluminum plate thickness is 3 mm. use according to the requirement to strengthen measures to ensure that aluminum plate external roughness is not greater than 0.1%, or 1.5 mm (within 1.5 meters), and will be subject to a smaller value. used in the canopy and ceiling aluminum plate thickness should be 5 mm.
c. cover plate thickness should be 3.0 mm minimum.
b. aluminum surface treatment on the surface of the aluminum color and should be handled in aluminum manufacturers within the scope of the standard color card with the approval of product line.
1. the fluorine carbon spraying or other equivalent approach must be approved by the architect.
2. outdoor exposed aluminum
a. all the visible surface of the aluminum outdoor should exert duranar xl coating in the factory, by using fluorocarbon lacquer should be based on ppg company or other authorized formula preparation plant kynar supply by 500 fluorinated polymer resin. outer wall of the subcontractor shall submit written authorization certificate before spraying owners and architects audit, prove its spray paint formulation and operation meet the requirements.
b. duranar xl coating contains three coating baking. ppg paint dry film film thickness 5 to 8 micro meters on average. duranar color paint dry film, on average, 25 micron film thickness. xl sun storm varnish dry film film thickness on average 10 to 20 microns. is the total dry film film thickness should be at least 40 microns.
c. such as in the corner, groove indentation or invisible part should also try to spray.
d. aluminum often before cutting and processing has a certain length. outside the curtain wall subcontractor shall use appropriate processing equipment to ensure that the cutting edge in good condition. if cutting edge exposed in the outdoor environment should be treated or seal to avoid edge damage coating.
e. surface treatment
1) a1 - duranar xl (3) or products, at the same level of shallow argent, consistent with samples by the architect audits.
2) a2 - duranar xl (3) or at the same level products, dark gray, consistent with samples by architects.
3) a3 - duranar xl (3) or at the same level products, blue gray, consistent with samples by the architect audits.
4) ar1 - vertical side whipstitch roofing system, anodic oxidation and embossing process. in accordance with samples by architects.
5) ar1p - perforated rate 32%, round hole diameter 3 mm upright side whipstitch roofing system, yang oxidation and embossing process. in accordance with samples by architects.
6) ar4 - duranar xl (3) or at the same level products, color and texture and ar1.
3. the interior leakage
a. ppg fluorocarbon paint factory on aluminum surface treatment.
b. dry film film thickness should be at least 60 to 80 microns
c. such as in the corner, groove indentation or invisible part should also try to spray.
d. operation should be obtained by the formula of the lacquer that bake factory authorized paint factory implementation, operation should strictly comply with the technical requirements for cleaning, render, coating, and in all aspects of the quality control requirements. outer wall of the subcontractor shall submit written authorization certificate before spraying owners and architects audit, prove its spray paint formulation and operation meet the requirements.
e. surface treatment 1) a4 - duranar(2) or products at the same level, dark gray, consistent with samples by architects. 2) the a5 - duranar (2) or products at the same level, shallow silver, consistent with samples by architects
4. the surface of the lacquer that bake should at least meet the request of "aama 2605 -" the high performance of organic coatings for aluminum and panel "non-mandatory specifications, performance requirements and testing procedures.
5. the surface of the lacquer that bake should at least meet the request of "aama 2603 -" in "colored organic coatings for aluminum and panel of non-mandatory specifications, performance requirements and testing procedures.
6. the surface of the lacquer that bake should at least meet the request of "aama 2604 -" "colored organic coatings for aluminum and panel of non-mandatory specifications, performance requirements and testing procedures..
7. in the same way of surface treatment of the adjacent components in normal light, color difference should be impossible to detect with the naked eye. outside the curtain wall subcontractor shall product reflects off color range for the largest industry, architects and design consultant checking.
8. the outer wall of the subcontractor shall establish and review a set of complete quality control system to ensure that can meet the provisions of the technical requirements. quality control system shall include procedures, steps, test records, etc. outside the curtain wall subcontractor shall save the complete records of the inspection, testing and application, and the records shall be regularly submitted to the owner, architect and design consultant. in the quality control system to get the owner and the architect review and approval before, not for surface treatment.
9. may not be submitted without inspection and testing of materials, according to the standard or color more than the standard color range, or by the owner or the architect rejected material.
10. the scene of aluminium touch-up must obtain written permission from the owner. field paint can only use "air dry" means, specific as follows:
a. the touch-up materials and procedures must be strictly in accordance with coating manufacturers written instructions.
b. the owner or the architect of damaged materials must be replaced.
c. outside the curtain wall subcontractor must on sample testing of a complete set of touch-up process, and to owner and construction division for review. before the owner and the architect of the sample approval, and shall not conduct site repair paint.
the aluminum production process
aluminum production process mainly includes casting, extrusion and coloring (paint this project mainly includes: the anode oxidation, fluorine carbon spraying) three process.
1, the first is casting aluminum production process.
main process are: ingredients:
(1) according to the need to produce specific alloy nameplate, calculate the amount of all kinds of alloy composition, reasonable collocation a variety of raw materials.
(2) melting: to add with good raw materials according to the technological requirements to melt in the furnace, and through the degassing, slag refining method will melt in the slag, gas effectively removed.
(3) casting, smelting good under the certain condition of the casting process of aluminum liquid, through the deep well in casting system, cooling casting into all kinds of round bar.
2, extrusion, extrusion is a means of material forming. according to the profile section of product design and produce mould first, using extrusion machine heating good round casting rod extrusion forming of the mould. commonly used brand 6063 alloy, return when the extrusion with a air cooling quenching process and its after artificial aging process, to complete the strengthening heat treatment. different type of heat treatment strengthen alloy, the different heat treatment system.
3, anodic oxidation coloring: anodic oxidation: aluminum profile extrusion good, its surface corrosion resistance is not strong, must through the anodic oxidation surface treatment to increase the corrosion resistance and wear resistance of aluminum and aesthetic appearance. the main process for:
(1) surface pretreatment: use the method of chemistry or physics was carried out on the material surface cleaning, naked, pure matrix for obtain complete, the density of artificial oxide film. you can also get a mirror or by mechanical means no light (matte) surface. anode oxidation:
(2) the surface pretreatment of profiles, under certain technological conditions, substrate surface anodic oxidation, generate a layer of dense, porous, strong adsorbability al203 film layer.
(3) hole sealing: will be generated after anodic oxidation membrane pore sealing of porous oxide film, the oxide film pollution prevention, corrosion resistance and wear resistance increased. oxide film is colorless, transparent, the use of hole sealing before oxidation film of strong adsorption, in some metal salts adsorption sedimentation of film hole, can make the profiles look outside show ecru (silver) many colors, such as: black, bronze, golden color and stainless steel, etc. fluorine carbon coating: coating process: spray paint to paint, the paint coat to bake (180-250 ℃), qc multi-layer spray spray process with three (3) injection, floor paint, paint spraying and the paint coat and secondary spraying (primer, paint).
1. the purpose of the pretreatment: before were sprayed aluminum alloy molding, plate, the surface should pass to oil decontamination and chemical treatment, to produce chromium film, surface coating and metal bonding force and anti-oxidation ability, is helpful to extend the lifespan of the paint film.
2. the primer coating: as a closed primer coating substrate, its role is to improve the penetration resistance of the coating, strengthen the protection of substrate, stable metal surface layer, strengthen paint and metal surface adhesion, can ensure that the color of the paint coating uniformity, paint layer thickness for 5 to 10 microns.
3. paint coating: coating, paint coating is one of the key layer, is needed to provide aluminum decorative color, make the aluminum appearance to meet the design requirements, and protect the metal surface from the external environment atmosphere, acid rain and pollution, prevent the ultraviolet rays penetrate. greatly enhance the capacity of anti-aging, paint coating is the most thick layer of a layer of paint spraying, paint layer thickness is commonly 23 to 30 microns.
4.hood light lacquer coating: hood light paint coating is also called the varnish coating, main purpose is to more effectively enhance paint layer of the erosion resistance, protect the paint coating, increase the metallic paint color, look more colorful, brilliant, coating thickness for 5 to 10 microns. three spray coating aggregate thickness generally for 40 to 60 micrometers, special needs can be upset.
5. curing processing: three spray coating generally need a second curing, aluminum processing into curing furnace, curing temperature generally between 180 ℃ to 250 ℃, curing time is 15 to 25 minutes, different fluorocarbon paint manufacturer, can according to your own coating, provides the best temperature and time. chlorine carbon spraying plant oil on (for) some based on his experience when the three spray twice cure to a cure.
6. quality inspection: the inspection should be made according to standard aama - 605.02.90. strict quality inspection to guarantee the high quality coating products.