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| What are the advantages and disadvantages of aluminium alloy sealing at room temperat |
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Posted by: Keganhirl - 07-25-2019, 09:26 AM - Forum: aluminium faq
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The early aluminum alloy hole sealing technology is hot and cold hole sealing, the middle temperature hole sealing is the subsequent in order to make up for the defects of the first two. Cold sealing hole is usually called room temperature sealing hole, after manufacturers over the years of production practice, explored a lot of room temperature sealing characteristics, then, room temperature sealing hole have what advantages and disadvantages?
1) characteristics of sealing hole at normal temperature
(1) energy saving: the hot water sealing hole requires the working temperature to be above 95℃, while the low temperature sealing hole working temperature is only 25 ~ 35℃, which can greatly reduce energy consumption.
(2) improvement of working environment: the production line with hot water sealing holes, due to the evaporation of steam, not only causes corrosion to the factory components, but also causes bad working environment for operators. Low temperature hole sealing process is carried out at room temperature, which can improve the working environment.
(3) improve the sealing efficiency: the sealing speed of hot water sealing process is about 3 min/ ms, while the sealing speed of ht200 normal temperature sealing agent can reach 1 min/ ms, which greatly improves the production efficiency and reduces the number of sealing slots.
(4) eliminate the phenomenon of hanging ash on the surface of products sealed with hot water: when sealing with hot water, hydration reaction is carried out rapidly inside and outside the oxidation film hole. When the film hole is closed by hydrate, a large amount of hydrate is formed on the surface, resulting in the phenomenon of hanging ash on the surface of products. However, the low-temperature hole sealing process can control and adjust the concentration and pH value of various substances in the hole sealing agent, so that the precipitation reaction can only be carried out in the oxidation film hole, reducing the phenomenon of hanging ash on the surface of the products of hole sealing.
(5) improve the surface hardness and wear resistance of the profile: the hot water sealing process is to achieve the purpose of sealing the hole by generating wave meter alumina (A12O3. Generally, the hardness of oxidation film formed after using ht200 normal temperature hole sealing agent at low temperature will increase. The microhardness test of the samples with oxidation film thickness of 12 to 13 microns showed that the hardness of the oxidation film without sealing was 340 to 360 HV, and the hardness of the oxidation film after sealing with hot water was 540 to 560 HV.
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| Optimization Of Double-die Hole Easy-to-wall Hollow Aluminum Profile Mould |
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Posted by: Keganhirl - 07-25-2019, 09:24 AM - Forum: Knowledge & Technique
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Here is talking Optimization of double-die hole easy-to-wall hollow aluminum profile mould.
If you have any idea about the Aluminum Walking Aid, welcome to contact us and discuss.
![[Image: 5d103e2b25796.png]](https://www.xindongrui-aluminum.com/data/upload/ueditor/20190624/5d103e2b25796.png)
Under normal circumstances, whether the two mold holes are discharged up and down or left and right discharge, the metal flow rate near the center side is fast, and the supply is sufficient, so that the upper mold core is elastically deformed outward, causing the profile to be away from the center and the wall is thin. Partial wall defects. Therefore, in the mold design process, when the section size of the profile is increased, the offset dimension of the cross-wall which usually produces the partial wall is previously set. If the two die holes share the center split hole, in order to ensure a relatively stable supply of the two dies holes, a baffle type splitter bar can be added in the middle position of the two holes in the bin, which is also advantageous for mold repair.
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| Difficulties In Welding Aluminum Alloy Materials |
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Posted by: Keganhirl - 07-25-2019, 09:21 AM - Forum: Knowledge & Technique
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(1) Extremely easy to oxidize. In the air, aluminum is easily oxidized to form a dense film of Al2O3 (thickness of about 0.1-0.2 μm) with a high melting point (about 2050 ° C), far exceeding the melting point of aluminum and aluminum alloy (about 600). °C or so). The density of alumina is 3.95-4.10g/cm3, which is about 1.4 times that of aluminum. The surface of the alumina film is easy to absorb moisture. When welding, it hinders the fusion of the basic metal, and it is easy to form pores and slag. Defects such as infusion cause a drop in weld performance.
![[Image: 5d16de377c201.png]](https://www.xindongrui-aluminum.com/data/upload/ueditor/20190629/5d16de377c201.png)
(2) It is easy to produce pores. The main cause of pores in the welding of aluminum and aluminum alloys is hydrogen. Since liquid aluminum can dissolve a large amount of hydrogen, solid aluminum hardly dissolves hydrogen. Therefore, when the temperature of the molten pool is rapidly cooled and solidified, hydrogen does not come out easily, and it is easy to weld. The slits gather to form pores. Hydrogen holes are currently difficult to avoid completely, and there are many sources of hydrogen, such as hydrogen in an arc welding atmosphere, aluminum plates, and the surface of the wire adsorbing moisture in the air. The practice has proved that even if argon gas meets the requirements of GB/T4842, the purity is above 99.99%, but when the moisture content reaches 20ppm, a large number of tight pores will also appear. When the relative humidity of air exceeds 80%, the weld will be There are obvious stomata.
(3) The deformation of the weld and the tendency to form cracks are large. The coefficient of linear expansion and the rate of crystal shrinkage of aluminum are about twice as large as that of steel, which tends to cause large internal stresses of welding deformation, and the structure with higher rigidity will promote the generation of hot cracks.
(4) The thermal conductivity of aluminum is large (pure aluminum 0.538 cal/cm.s. °C). It is about 4 times that of steel. Therefore, when welding aluminum and aluminum alloys, it consumes more heat than welded steel.
(5) Evaporation of alloying elements. Aluminum alloys contain low-boiling elements (such as magnesium, zinc, manganese, etc.), which are easily evaporated and burned under the action of high-temperature arc, thus changing the chemical composition of the weld metal and degrading the weld performance.
(6) Low-temperature strength and low plasticity. The strength and plasticity of aluminum at low temperatures are low, which destroys the formation of weld metal, and sometimes causes the weld metal to collapse and weld.
(7) No color change. When aluminum and aluminum alloys is changed from solid to liquid, there is no obvious color change, which makes it difficult for the operator to grasp the heating temperature.
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| Optimization Of Aluminum Profile Mould |
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Posted by: Keganhirl - 07-25-2019, 09:18 AM - Forum: Knowledge & Technique
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Optimization of flat aluminum profile mold with a small opening and large hanging wall area
![[Image: 5d19bbd43637a.png]](https://www.xindongrui-aluminum.com/data/upload/ueditor/20190701/5d19bbd43637a.png)
Under the condition of the flat mold design which is usually fully fed directly, the profile of the cantilever is easy to be deformed so much that it is broken or dropped. In this case, it can be designed as a hanging core mold, but it is not easy to repair the mold. Some profiles have very small openings and are almost closed. This can be combined, but the openings need to be tight.
Generally, the flat aluminum profile with a small opening and large armrest area can design the straight feed plate as a bridge feed plate or a cantilever bridge feed plate, and place the forceful suspended wall surface under the bridge, so that the profile can be The cantilever is protected. When the metal stream fills the die hole, the metal flow from the feed plate passes through the bridge of the bridge feed plate, and the occlusion of the cantilever does not directly act thereon, thereby reducing the positive pressure on the die cantilever. Improve the stress state of the cantilever. Extends the life of the mold.
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| Advantages of Aluminum Curtain Finials |
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Posted by: Keganhirl - 07-25-2019, 09:16 AM - Forum: Knowledge & Technique
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1. Light weight, high strength
The aluminum alloy material is mostly a hollow core thin-wall combined section, which is convenient to use, reduces weight, and has a high bending strength of the cross section, and the finished door and window is durable and has small deformation.
2. Better sealing
The aluminum alloy itself is easy to squeeze, the cross-section of the profile is accurate, and the processing is accurate and high. The sealing materials with good water resistance, elasticity and durability are selected, such as rubber bead and silicone series sealant. In terms of profiles, the various sealing strip fixing grooves have been completed in the same process as the extrusion section, which creates favorable conditions for installing the sealing material.
3. Beautiful appearance
After the surface of the aluminum alloy is treated by the anode phone, it can be in various colors, and can be arbitrarily selected, and is oxidized and polished. The sash frame is large and can be set with a large area of glass, which makes the indoor light bright and bright, enhances the contrast between the interior and exterior, and makes the living room more rich.
4. Strong corrosion resistance
The aluminum oxide layer generally does not fade, does not fall off, is not easy to change, easy to maintain, no maintenance.
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| Container foil manufacturer in China |
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Posted by: mingtaial - 07-25-2019, 09:02 AM - Forum: Buying Leads
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Container foil manufacturer - aluminum foil container
Aluminum foil containers are a widely used type of tableware. The thickness of the aluminum foil container is generally between 0.03 mm and 0.20 mm, and can be divided into wrinkle and wrinkle-free. Can also be divided into one-time and repeated use. It is often called tin foil container in China. In fact, it is a 3 or 8 series aluminum ingot raw material. It is cold rolled or hot rolled into a uniform thickness, smooth surface, no pinholes, no dust particles, no odor, aluminum foil master roll, after special One-time automatic cold stamping forming process for equipment and molds.
Container foil manufacturer container aluminum foil performance advantages:
1. Raw materials are non-toxic and of good quality.
2. Convenient heating, no harmful substances will be produced after heating.
3. Easy to form, easy to seal, and ensure food hygiene.
4. Strong barrier property, can protect the original taste of food after sealing, and extend the shelf life of food.
5. It can be efficiently recycled and reused to protect the environment and save resources.
https://www.aluminumsheet-manufacturer.com
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| How to Choose aluminium Heat Sink? |
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Posted by: Keganhirl - 07-25-2019, 09:00 AM - Forum: aluminium faq
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Types of heat sink:
At present, the main types of heat sinks are: iron heat sink, steel heat sink,OEM Aluminum Led Heat Sink and aluminum-magnesium alloy heat sink.
Custom Aluminum Electronic Heat Sink
The following factors should be considered when purchasing a heat sink:
1. Choose a manufacturer that is satisfied with consumer satisfaction or after-sales service.
2. To shop around, for the same style, the same brand of goods, from the quality, price, service and other aspects of comprehensive consideration.
3. Security.
The safety and performance of the radiator is the most important. There are many factors involved in the safety performance. Among them, the working pressure of the radiator is very important. Many radiators at home and abroad use bar as the unit. Most working pressures are above 10 bar, and 1 bar can withstand the pressure equivalent to 10 m water column. 10bar or 100m water column pressure, for the majority of users, 10bar or more radiator should be a reasonable choice.
4.Selection.
When selecting the type, it should be clear that the inlet and outlet water temperature, room temperature requirements, room heat load, window sill height and width, and the heating system used by the family are single or double pipe.
5. Does the manufacturer have many years of experience in the production of heating equipment? And whether the products meet the national standards.
6. Whether it can provide good after-sales service, whether there is a professional plumbing measurement installation team.
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![[Image: 5d1ef5c5925aa.png]](https://www.xindongrui-aluminum.com/data/upload/ueditor/20190705/5d1ef5c5925aa.png)
![[Image: 5d2c2c706a502.jpg]](https://www.xindongrui-aluminum.com/data/upload/ueditor/20190715/5d2c2c706a502.jpg)