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Introduction and Production Technology of Aluminum Profile |
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Creatime: 2017/2/27 |
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First, the performance requirements of aluminum
A. Aluminum
1. The following combinations of alloy types and hardness shall be used for the production of aluminum profiles if they meet the requirements of production, processing, surface treatment and performance requirements: 6063-T5, 6063-T6, 6105-T5, 6061-T6. Other 6xxx series of alloys if the technical requirements of the provisions can also be sent for approval. The thickness of the aluminum profile can not meet the following requirements on the basis of satisfying the performance requirements:
Main aluminum profile: 3.0mm.
B. Glass cover and non-structural decorative strip: 1.5mm.
C. All aluminum profiles must be used for building advanced products, the allowable processing error should meet the "GB / T 5237 - aluminum alloy construction profiles." Its material should meet the "GB / T 3190 - deformation of aluminum and aluminum alloy chemical composition" requirements.
D. All submissions shall be accompanied by a mold showing the requirements of the wall thickness of the above material and archived.
2. The following combinations of alloy types and hardness, if the processing, surface treatment and performance requirements, can be used with the production of aluminum or aluminum: 3003-H14, 5005-H14. Other 3xxx, 5xxx or 6xxx series of alloys if the technical requirements of the provisions can also be sent for approval. Plate should meet the "GB / T 5237" requirements. The thickness of the plate shall not be less than the following requirements on the basis of the performance requirements:
A. Aluminum plate molded components: 3.0mm.
B. Unless otherwise specified in architectural drawings, the thickness of the aluminum plate is 3 mm. According to the requirements of the use of strengthening measures to ensure that the external flatness of aluminum is not greater than 0.1% or 1.5mm (within 1.5 meters), whichever is smaller. The thickness of the aluminum plate used for canopy and ceiling should be 5mm.
C. Cover plate thickness should be a minimum of 3.0mm.
B. SURFACE TREATMENT - The color and handling of the aluminum aluminum surface shall be in accordance with the approved sample submitted within the standard color card of the aluminum manufacturer.
1. Fluorocarbon spraying or other equivalent practices are subject to the approval of the architect.
2. Outdoor exposed aluminum
A. All outdoor visible aluminum surfaces shall be applied to the factory with a Duranar XL coating which shall be based on the Kynar 500 fluorinated polymer resin supplied by PPG or other authorized recipes. The outer wall subcontractor shall submit a written authorization certificate to the owner and architect before the spraying to verify that the paint formulation and spraying operation meet the requirements.
B. The Duranar XL coating consists of three coated three baked. PPG Primer Dry Film Average Film Thickness 5 to 8 microns. Duranar paint dry film average film thickness of 25 microns. XL Sun Storm Clear dry film with an average film thickness of 10 to 20 microns. The total dry film thickness should be at least 40 microns.
C. Such as the inner corner, groove and other indentation or non-visible part should also try to spray.
D. Aluminum often has a certain length before cutting and processing. Outside curtain wall subcontractors shall use suitable processing equipment to ensure that the cutting edges are in good condition. Cutting edges should be treated or sealed if exposed to an outdoor environment to avoid damage to the edges.
E. Surface treatment
1) A1-Duranar XL (3-coat) or similar products, light silver, consistent with the samples examined by the architect.
2) A2-Duranar XL (3-coat) or similar products, dark gray, consistent with the samples reviewed by the architect.
3) A3-Duranar XL (3-coat) or similar products, blue-gray, consistent with the samples reviewed by the architect.
4) AR1 - upright locking roof system, anodizing and embossing. Consistent with the architects' audit samples.
5) AR1P - piercing rate of 32%, round hole diameter 3mm vertical lock roof system, anodizing and embossing treatment. Consistent with the architects' audit samples.
6) AR4-Duranar XL (3-coat) or similar products, color and texture consistent with AR1.
3. Indoor exposed aluminum
A. Aluminum surface in the factory by applying PPG fluorocarbon paint treatment.
B. Dry film thickness should be at least 60 to 80 microns
C. Such as the inner corner, groove and other indentation or non-visible part should also try to spray.
D. Baking operation shall be carried out by the paint factory authorized by the recipe factory. The operation should strictly follow the technical requirements for cleaning, rendering, coating, and quality control. The outer wall subcontractor shall submit a written authorization certificate to the owner and architect before the spraying to verify that the paint formulation and spraying operation meet the requirements.
E. Surface treatment 1) A4-Duranar (2 coated) or similar products, dark gray, consistent with the audit samples by the architect. 2) A5-Duranar (2-coated) or similar products, light silver, consistent with the samples examined by the architect.
4. Surface paint should meet at least the requirements of "AAMA 2605" - "Non-Mandatory Specification, Performance Requirements and Test Procedures for High Performance Organic Coatings for Aluminum Profiles and Panels".
5. Surface paint should meet at least the requirements of "AAMA 2603" - "Non-Mandatory Specification, Performance Requirements and Test Procedures for Colored Organic Coatings for Aluminum Profiles and Panels".
6. Surface paint should meet at least the requirements of "AAMA 2604" - "Non-Mandatory Specification, Performance Requirements and Test Procedures for High Performance Colored Organic Coatings for Aluminum Profiles and Panels".
7. The same surface treatment using the adjacent components of the color difference in normal sunlight, should be able to achieve the degree of visual inspection can not be used. Outside curtain wall subcontractors should submit samples to reflect the maximum range of colors for industrial owners, architects and design consultants to check.
8. Outer wall subcontractors shall establish and submit a complete set of quality control systems to ensure that these technical requirements are met. The quality control system shall include documented procedures, procedures, tests, and so on. The outer wall subcontractor shall keep a complete record of the inspection, testing and procedures and shall keep the record to the owner, the architect and the design consultant on a regular basis. In this quality control system by the owners and architects before the audit and approval, shall not be surface treatment.
9. Do not submit materials that have not been tested and tested by standard, or have a color difference that exceeds the standard color range, or material rejected by the owner or architect.
10. The on-site furnishings of aluminum must be obtained in writing by the owner. Live paint can only use the "natural dry" way, as follows:
A. The materials and procedures for field paint must be in strict accordance with the manufacturer's written instructions.
B. The damaged material identified by the owner or architect must be replaced.
C. The outer wall subcontractor must test the entire set of paint on the sample and submit it to the owner and the architect. Before the owners and architects have accepted the samples, they may not carry out on-site paint. Second, the aluminum production process Aluminum production process, including casting, extrusion and color (this project mainly include color: anodic oxidation, fluorocarbon spray) three processes. 1, casting is the first aluminum production process.
The main process is:
(1) Ingredients: According to the need to produce the specific alloy grades, calculate the amount of various alloy composition, with a reasonable variety of raw materials.
(2) smelting: with a good raw materials according to the process requirements to join the melting furnace melting, and by degassing, slag refining means of the melt within the slag, the gas effectively removed.
(3) casting: smelting aluminum liquid in a certain casting process conditions, through the deep well casting system, cooling cast into a variety of round cast rods.
2, extrusion: extrusion is the means of forming profiles. First, according to profile products cross-section design, manufacturing mold, the use of extruder will be heated a good round cast rod from the mold extrusion. Commonly used grade 6063 alloy, in the extrusion with a cold air quenching process and after the artificial aging process to complete the heat treatment to strengthen. Different grades of heat treatment to strengthen the alloy, the heat treatment system is different.
3, color anodizing: anodizing: extruded aluminum alloy profiles, the surface corrosion resistance is not strong, must be subjected to anodic oxidation surface treatment to increase the corrosion resistance of aluminum, abrasion resistance and appearance of the degree of beauty The The main process is:
(1) surface pretreatment: chemical or physical method to clean the surface of the profile, exposed pure matrix, in order to facilitate access to complete, dense artificial oxide film. It is also possible to obtain a mirror or matte (matt) surface by mechanical means.
(2) anodizing: the surface pretreatment of the profile, under certain conditions, the substrate surface anodic oxidation, resulting in a layer of dense, porous, strong adsorption capacity of the AL203 film.
(3) Sealing: The pores of the porous oxide film formed by anodic oxidation are closed, so that the oxide film is resistant to contamination, and the corrosion resistance and abrasion resistance are enhanced. The oxide film is colorless and transparent, the use of sealing before the strong adsorption of the film, in the membrane hole adsorption deposition of some metal salts, the appearance of the appearance of the appearance (silver) outside the many colors, such as: black, bronze, Gold and stainless steel color. Fluorocarbon Spraying: Spraying Process: Spray Primer → Finish → Glossy Paint → Baking (180-250 ℃) → Quality Inspection Multilayer Spraying Process Three spray (three spray), spray bottom finish, finish and Varnish and secondary spray (primer, topcoat).
1. The purpose of the pre-treatment: aluminum alloy profiles, plates before spraying, the workpiece surface to go through the oil decontamination and chemical treatment to produce chrome film, increase the coating and metal surface adhesion and oxidation resistance, is conducive to extend the paint The useful life of the membrane.
2. Primer coating: as a closed substrate primer coating, its role is to improve the coating anti-permeability, and enhance the protection of the substrate, the stability of the metal surface layer, to strengthen the topcoat and metal surface adhesion, The color uniformity of the paint, the thickness of the paint layer is generally 5-10 microns.
3. Topcoat: The topcoat is a key layer of the spray coating, which is required to provide the decorative color required for the aluminum material, so that the appearance of aluminum to meet the design requirements, and to protect the metal surface from the outside world atmosphere, acid rain, pollution erosion , To prevent UV penetration. Greatly enhance the anti-aging ability, topcoat coating is the thickest layer of paint spray, paint layer thickness is generally 23-30 microns.
4. The main purpose is to more effectively enhance the paint resistance to external erosion, to protect the finish coating, increase the color of the finish of the metallic luster, the appearance of more bright colors, Dazzling, coating thickness is generally 5-10 microns. The total thickness of the three spray coating is generally 40-60 microns, special needs can be thickened.
5. Curing treatment: three spray coating generally need secondary curing, aluminum into the curing furnace treatment, curing temperature is generally between 180 ℃ -250 ℃, curing time of 15-25 minutes, different fluorocarbon coating manufacturers, will be based on their own Paint, to provide the best temperature and time. Chlorinated carbon spraying plant (or refinery) and some according to their own experience to the three spray when the two curing to a curing.
6. Quality inspection: quality inspection should be AAMA-605.02.90 standard. Strict quality inspection to ensure high-quality spray products. |
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