Aluminum profile Powder coating process
(1) Pretreatment. The surface pretreatment process is generally degreasing and chemical conversion. Degreasing is generally treated with special degreasing agents, whose purpose is to remove the grease, dirt and debris attached to the surface of the aluminum profile during the extrusion process, and to remove the oxide film on the surface of the profile. Chemical conversion treatment is generally chromified or phosphorus-chromified treatment, the purpose of which is to form a layer of chemical conversion film (such as chromified film or phosphorus-chromified film) on the surface of the substrate to enhance the adhesion between the substrate and the coating, and to protect the substrate.
(2) Drying treatment. The purpose of drying is to remove the water carried by the pretreatment process. There are generally two ways of drying, one is natural drying, and the other is high temperature drying. Natural drying, long drying time, low efficiency, enterprises rarely use; Most enterprises are using high temperature drying. High temperature drying should control the drying temperature, the general drying temperature after chrome treatment should not be higher than 65℃. The drying temperature of phosphate-chromium treatment should not be higher than 85 ° C. If the temperature is too high, the chemical conversion film will lose too much water and be destroyed.
(3) Powder coating treatment.
Electrostatic powder treatment
Electrostatic powder treatment is applied the powder to the surface of the aluminum alloy profile through the powder spraying gun to form a protective and decorative organic polymer film. It is to apply negative high pressure to the spray gun and ground the workpiece to form a high voltage electrostatic field between the spray gun and the workpiece.
Electrostatic liquid spraying process
Electrostatic liquid spraying process is to apply liquid coating to the surface of aluminum alloy profiles by electrostatic spraying gun to form a protective and decorative organic polymer film. For acrylic paint spraying and polyester paint spraying, it is generally brush coating, that is, to form a layer of paint film, and fluorocarbon paint spraying generally requires two, three or four coating treatments.
The differences between electrophoresis and anodized for aluminum profiles
What is the difference between electrophoresis and anodized?
The same point: all use electricity to complete the processing technology.
The difference: there is not much difference in appearance, but the texture is different. Anodizing is oxidized first and then colored, while electrophoresis is directly colored. The two are originally different processes. Anodized is a functional surface treatment with additional coloring, generally mainly on aluminum. On the other hand, electrophoresis focuses on decorative performance, but it is paint after all, and the metallic feeling may not be so good. Electrophoresis is equivalent to applying a layer of resin paint to the metal surface. And anodized is to use electrochemical method to make the surface metal aluminum and oxygen react to form a protective film, the surface has a metallic texture, and the grade is higher. It will be better if the electrophoresis is performed after oxidation.
anodized: anodized, the electrochemical oxidation of a metal or alloy. Aluminum and its alloys are a process in which an oxide film is formed on an aluminum product (anode) under the action of an applied current under the corresponding electrolyte and specific process conditions. Anodizing, if not otherwise specified, usually refers to sulfuric acid anodizing. In order to overcome the defects of aluminum alloy surface hardness, wear resistance, etc., expand the scope of application, and prolong the service life, surface treatment technology has become an indispensable part of the use of aluminum alloys, and anodized technology is currently the most widely used and most successful. of.
Electrophoresis: Under the action of an electric field, charged particles move toward the electrode opposite to it, which is called electrophoresis (EP). The technique of using charged particles to move at different speeds in an electric field to achieve separation is called electrophoresis.
Production introduction of industrial aluminum
The industrial aluminum profile is an industrial frame profile produced by heating the aluminum rod through the extrusion mold. And the aluminum rod is melted through the aluminum ingots, which is called the industrial aluminum profile raw materials; The quality of raw materials will directly affect the performance of industrial aluminum products.
We should control the temperature when do the heating treatment of aluminum rod. If the temperature is too high or too low, it will directly affect the hardness of the finished product. So the temperature must be strictly controlled during the heating and cooling process.
Industrial aluminum profile is the final product of aluminum rod extruded by heating through the molds, and the molds are designed according to the demand with high precision specifications, used for extruding the required profile products.
The speed of extrusion is a fundamental and critical process factor for production, it must be carefully controlled during the extrusion process.
The straightness affects the use of aluminum profiles, so the straightness of aluminum profiles is one of the important standards for the quality of aluminum profiles. Generally, the extruded profiles need to be straightened for ensuring the straightness.
When the aluminum profiles are extruded from the machine, them have low hardness before aging and cannot be used as finished products. So in general, they must be aged to improve strength.
In addition, To increase its hardness, for the T5, we usually let the aluminum profile cooling by air; For the T6, we normally cooling it by water.
Generally the surface of aluminum industrial profiles is anodized silver, with this treatment, the profiles will be elegant, beautiful and corrosion resistance. Then after cooling, straighten and cutting, the aluminum extrusion part complete.
Quality inspection standards for aluminum doors and windows
In order to ensure that the technical requirements of exterior doors and windows are clarified in the process of project design, procurement, and construction, the performance requirements of wind pressure resistance, water tightness, air tightness, heat preservation, sound insulation, lighting, safety, etc. are met, and common problems in exterior doors and windows projects are avoided. Repeatedly, these ten key points of door and window quality control are worth seeing! These are the quality inspection points when the broken bridge aluminum doors and windows project is completed.
Front part: Quality control performance requirements for exterior doors and windows
1. Carefully choose the color of aluminum alloy doors and windows.
Mainly divided into two kinds of monochrome and wood grain color. General monochrome such as white, gray, wood grain color such as North American oak, South Asian rosewood, camphor wood, sandalwood, red sandalwood. In terms of the color of the paint surface, the color of the aluminum door needs to be combined with the decoration style and design of your home, so as to perfectly combine the harmonious atmosphere.
2. Choose aluminum alloy doors and windows made of healthy and environmentally friendly materials
During the purchasing process, you will definitely smell the smell from the doors and windows. Doors and windows made of inferior materials can damage the respiratory tract, leading to dizziness and headaches. High-quality aluminum alloy doors are made of high-quality, healthy and environmentally friendly aluminum profiles. The smell is light, and it usually doesn’t smell after a while.
3. Door and window details matter
Doors and windows with good details are equivalent to appreciating a carefully crafted handicraft. Its connection, colloid bonding, and extrusion processes are all products processed through multiple links and multiple processes. The treatment of details is related to the beauty and life of doors and windows. When purchasing, you must carefully inquire, select, and read the product manual to understand the forming process.
4. Focus on texture
Aluminum alloy doors and windows are the patron saint of a home. The quality is good or bad is to determine the value of a door and window. At the time of purchase, you can judge whether it is rough, cracked, or poorly colored by touching it. Regular brand aluminum alloy doors and windows, the manufacturer, place of origin, model, specification, etc. will be written on the label. Beware of buying counterfeit and inferior products.
Matters needing attention in aluminum alloy spraying operation
The spray guns should maintain a certain inclination, which is biased towards the running direction of the profile. The spray guns should be kept vertically parallel in arrangement, and the end parts should be kept in a straight line. There should be no overlapping parts between the spray guns. It is advisable to cover all profiles.
Control of fluidizing air pressure
The control of fluidized air pressure, the function of the fluidized bed is to use the effect of the air flow to make the powder form a proper fluidized state, the hand feel is similar to the state of liquid flow, and the fluidization is detected to reach a sufficient state. The simpler operation is: use When the powder is stirred by hand or stick, there is no resistance. Fluidization facilitates the suction of powder into the duct. Under the action of accelerated wind, the effect of atomization is produced. Insufficient or excessive pressure will cause insufficient fluidization.
What are the aluminum extruded profiles?
Aluminum profiles are extruded sections of aluminum that have a variety of cross sectional shapes. They are commonly used in construction, manufacturing, and engineering industries due to their lightweight, corrosion resistant, and high strength properties.
Aluminum profiles are typically produced using an extrusion process, in which a heated billet of aluminum is pushed through a steel die/mould to create a specific cross sectional shape. The profile can be created in almost any design or shape, including tubes, L shapes, T shapes, Z shapes, and U shapes, as long as the customers offer us the samples or their own designs, we are able to customized and produce them.
Aluminum extruded profiles can be widely used for a range of applications, such as for framing systems, window and doors, curtain walls, railings, automotive parts, LED lighting, heat sinks and more. They may also be anodized, powder coated, PVDF, polished, sandblasted and wood grain transferred to enhance their appearance or provide additional protection against corrosion.
In general, aluminum profiles are versatile and highly customized, making them a popular choice for various industrial and architectural applications.
What are the extrusion methods for aluminum profiles?
A brief description of extrusion method for aluminum profile processing
Aluminum processing is a very important technology, when the aluminum processing also need to consider many issues, for users, consider the process should be considered the most is the operation method, because the choice of different aspects of the extrusion effect is not the same as that of industrial aluminum production the manufacturers give you about processing aluminum extrusion method.
Aluminum extrusion
1. according to the direction of extrusion: can be divided into forward extrusion, reverse extrusion, lateral extrusion.
2. according to deformation characteristics: plane deformation extrusion, axisymmetric deformation extrusion, general three-dimensional deformation extrusion.
3. according to the state of lubrication: no lubrication, extrusion, lubrication, extrusion, glass lubrication, extrusion, ideal lubrication extrusion (hydrostatic extrusion).
4. according to the extrusion temperature: cold extrusion, warm extrusion, hot extrusion.
5. according to the type of mold or mold structure is divided into: flat die extrusion, cone die extrusion, split die press, with punch extrusion.
6. according to the blank shape or the number of points: bar extrusion, tube extrusion, solid aluminum extrusion, hollow aluminum extrusion, single section aluminum extrusion, extrusion products (single hole extrusion), extrusion products (porous extrusion).
7. according to equipment types: vertical extrusion, horizontal extrusion, continuous extrusion.
The surface treatment method of various aluminum substrates
Matte matte aluminum profile fabric: fabric to avoid the Aluminum Alloy profile bright light will form certain interference environment, under the condition of building decoration in the shortcomings of its surface such as brocade as soft and delicate, very popular with the favor of the market, but the existing grinding material must overcome sand surface is not uniform, and can see the pattern.
Aluminum machining
Multi color surface treatment of aluminum: the monotonous white and tinted silver has been unable to meet the good cooperation of architects and the exterior decorative tile, exterior wall latex, new stainless steel color, champagne, gold, gold, titanium series (red wine, red jujube red, black and purple) with color glass the decorative effect of the icing on the cake. These aluminum must be followed by chemical or mechanical polishing and oxidation, the effect was good.
Electrophoretic coating aluminum: electrophoretic coating aluminum surface soft luster, can resist the erosion of acid rain, cement mortar, Japan 90% aluminum after electrophoretic coating.
Powder electrostatic spraying aluminum profile: powder electrostatic spraying profile is characterized by excellent corrosion resistance, acid, alkali, salt fog is much better than the oxidation coloring aluminum profiles.
Plasma enhanced electrochemical surface ceramic aluminum profile: this type of aluminum profile is the most advanced processing technology in the world. The aluminum profile products are of good quality, but the cost is higher. It has more than 20 kinds of colors, the biggest feature is that it can be printed as needed according to the printing cloth, the surface of the section is colourful and the decoration effect is excellent.
Causes and elimination methods of concave and convex corrugation defects on aluminum profile
Causes of surface corrugation defects on aluminum profile:
1. the design of the length, proportion or cavity size of the aluminum profile extrusion die is seriously wrong, and the flow ratio is seriously disturbed.
2. aluminum extrusion dies work with angle of obstruction and angle of flow.
3. the difference of the drop ratio of the upper and lower die in the aluminum extrusion die.
4. die die work with parallel aluminum extrusion, a horn mouth.
5. the die resistance of the aluminum profile extrusion die is high on the flow table, blocking the work out with the material or drainage slot (size, depth, position).
6. aluminum profile extrusion die work belt outside the empty knife is too few, even does not have (the electric spark not to hit well) or too big (the work belt does not support to crack the distortion).
7. the new die or repaired aluminum extrusion die is difficult to produce because of the uneven grit, polishing and uneven working band.
8. part of aluminum extrusion work with oil.
9. the support pad is too small to hinder.
10. aluminum tail waves appear around 1m (V3 volume aluminum press).
What are the purposes and features of frame aluminum profiles?
Application of frame aluminum profile:
1. mechanical frame structure and all kinds of parts connection;
2. worktable, industrial assembly line, conveyor belt;
3. small automatic equipment and non-standard electromechanical equipment;
4. Industrial Inspection and inspection and safety protection system;
5. assembly line of electronic and auto parts;
6. chemical, pharmaceutical, medical, food, cleaning and other equipment;
7. commercial exhibition, outdoor advertising and stage settings, etc.;
8. industrial fence, protective cover, all kinds of frames;
What are the features of the profiles of frame aluminum profiles?
1. the use of a wide range: applicable to machine frames, stents and doors, industrial automation equipment, factories and offices table, shelves, containers, ladders and so on.
2. the construction is convenient: modular and multi-functional, without complex design and processing, you can quickly frame the ideal mechanical equipment coat.
3. beautiful and practical shape: light quality and high stiffness, concise appearance, no paint.
4. scalability: unique T type, groove design, the installation of components without dismantling sections, you can install nuts and bolts in any place, refitting equipment is simple and quick.
