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| Prospect of Aluminum Products Industry |
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Posted by: aadaasdark8072 - 04-18-2019, 08:44 AM - Forum: Knowledge & Technique
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Since the reform and opening up, China Aluminum Product industry has achieved rapid development, and China has become the world aluminum industry country, formed a relatively complete industrial system development as a whole from bauxite, alumina, electrolytic aluminum, aluminum processing.
In 2006, China's aluminum industry from 2005 to the entire industry losses rapidly turned to the industry, profits of 32 billion 400 million yuan, profits and taxes about 50000000000 yuan. Soderberg electrolytic aluminum production capacity backward was eliminated in 2006, 12 million tons of electrolytic aluminum production capacity of 160kA and above capacity accounted for 83%, has eliminated all Soderberg backward production capacity, production capacity of small prebaked cell transformation.
It is an opportunity for Aluminum Product Supplier.
![[Image: 1500103751612092.jpg]](http://www.huadongrivets.com/uploadfile/20170715/1500103751612092.jpg)
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| ALUMINUM DISK GONGS |
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Posted by: aadaasdark8072 - 04-17-2019, 09:52 AM - Forum: Knowledge & Technique
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ALUMINUM DISK GONGS (Article #1)
Easy to make, wonderful sound. If you decide to make gongs in this style, you can choose whether to keep it simple or take a more sophisticated approach.
Article 1: A Simple Approach
I have recently made a number of simple flat gongs out of aluminum disks. If you can get your hands on some aluminum disks of suitable size, these gongs are wonderfully quick and simple to make, and they really sound lovely. While you can make excellent-sounding gongs with a minimum of specialized skill and knowledge, it’s also possible, and quite rewarding, to take a more sophisticated approach in search of a more refined tone quality. In this first of a pair of articles to be posted here I’ll describe the simple approach. In a following article I’ll get into more sophisticated stuff. As a teaser for the second article, I’ll tell you now that the more sophisticated approach has to do with listening for the pitches of the different modes of vibration in hopes of getting the overtones within the tone to line up in coherent relationships. The gong set I made in keeping with the principles set out in that second article can be seen and heard here.
Important disclaimer: These notes are not about the making of traditional Asian gongs. That time-honored discipline is well beyond the reach of this writing. Rather, these notes concern the making of very simple disk gongs with minimal hammering required.
THE SIMPLE APPROACH
Here’s the basic idea: a flat aluminum disk of suitable thickness and diameter, hung form the right suspension points and struck at the center with the right sort of mallet, makes a lovely tone. It has many modes of vibration and thus many different frequencies within the tone, but when played as just described one of these modes stands out as the defining tone, giving it a clear sense of pitch, while the other modes blend in to help create the overall tone quality. If you’re happy with the pitch the gong is making, then no more need be done. If you want to tune the gong to another pitch, you can do so by hammering a small nipple or boss at the center to raise the pitch, while leaving the rest of the gong flat. All this will be described as we go along.
Where to get aluminum disks:
My original supply came from a metal scrap yard. I don’t know if I was lucky to find them there, or if they turn up at such places quite regularly. If you don’t find them there, aluminum disks are available from metals suppliers online (at high prices). You can also purchase sheet aluminum from metals suppliers and cut the disks yourself using one of several power tools that are up to the task, or have them custom-cut. (Metal-working tools are best, but because aluminum is the softest of commonly used metals, woodworking tools such as a woodworking bandsaw with the right blade can manage the work.)
Suitable aluminum alloys, suitable sizes:
The most common and affordable aluminum alloy is referred to as 6061; it works fine for this purpose. Thicknesses in the range of 3/32” to 1/8” are most suitable for flat gongs in small-to-medium sizes. Suitable diameters range between about 6” to about 20”. The 1/8” thickness is best for gongs over about 11” inches in diameter, and 3/32” for smaller. These sizes are suitable for gongs for pitches from about C3 (C below middle C) to G5. It’s possible to go lower with thicker material and larger diameters, but this takes us beyond the “simple gong making” we’re talking about in this article. In short, we’re focusing on this range because disks of this size and material are typically not too difficult to find or fabricate, they’re easy to work with, they’re neither so thin as to be easily damaged with heavy use nor so thick as to require too much effort in hammering, and they sound very well.
Where to drill the suspension holes:
Typically these gongs will be suspended on cords, two cords per gong. The cords pass through small holes drilled in the gong (about 1/8” diameter) at points roughly corresponding to 10 o’clock and 2 o’clock on an imaginary clock face, each located about 1/3 of the radius from the edge. To minimize fraying of the cords, slightly bevel the edges of the holes after drilling. A countersink bit works well for this. The reasoning behind these hole locations: the gong has several modes of vibration producing different pitches. One of these is most important for us in that it’s the one we’d like to dominate the sound and define the perceived pitch. Accordingly, we want to suspend the gong in a way that imposes minimal damping on this particular mode. It happens that this mode has node – an area of minimal vibration — in the shape of a ring at a distance of about 1/3 of the diameter in from the edge, so we place the holes within that ring for minimal damping.
Mallets:
The mallets you use will make a huge difference in the sound of the gong. The preferred sound comes from a moderately soft mallet head, and it turns out that there’s a commonplace item that is perfect for these gongs: superballs. The 1¼” size, or anything close to that, will work well for smaller gongs, and the 1¾” size is good for larger ones. Select a wooden dowel or similar material for the handle; drill a hole very slightly smaller than the diameter of the dowel through the superball, and press-fit the ball onto the mallet. If needed, add a drop of glue such as superglue (cyanoacrylate) to keep it in place.
Tuning (hammering the nipple):
Your original flat gong, without any hammering, may produce a pitch and tone quality that you are happy with. If that’s the case, no hammering is needed and you can skip to the mounting section below. In my experience, however, a bit of center-hammering improves the tone quality, so even if you’re not concerned about the pitch of the gong, I recommend hammering a small nipple. And of course if you are concerned about pitch, then hammering is the process by which you tune the gong to the intended pitch. You can only tune upward, so the original unhammered gong must be below the desired pitch, not above it. If you want a lower pitch, you’ll need to start with a larger disk. By hammering, you can raise the gong pitch as much as a major third; more is possible but that tends to compromise tone quality and also requires more work. The upshot is: the ideal situation is to start with a flat, untuned gong which is a little below your intended pitch. Best is if it’s about a major second or minor third below, but in any case not more than about a major third below.
Here now is a description of the hammering process. Remember once again that the procedure described here is not a traditional gong-making process at all; it’s just an approach that allows making these very simple aluminum disk gongs without too much work.
Before commencing hammering,it’s useful to create a temporary way of holding the gong for pitch-testing during the tuning process. For this purpose, tie loops of very fine string or strong thread through the holes. The fine string is needed because thick strings would get in the way and create unevenness during hammering for tuning. After tuning, the very fine strings can be replaced with something stronger.
To hammer the nipple, you need a flat surface that you can rest the disk on, which has a hollow that you can hammer the nipple into. Since the rest of the gong surface will remain flat, the hole diameter can be much smaller than the gong diameter – typically between about 15% and 18% of gong diameter. For the surface you can use a piece of plywood, minimum 1/2” thick and about 18” square or larger, with a circular hole cut out. You can use a circle cutter for this, and because you might at times wish to hammer nipples of different sizes, you may choose to cut not one but several holes of different sizes in your plywood sheet. The sizes of these holes can range from a little over an inch for very small gongs up to about three inches in diameter for large ones. Before making each hole cut, use a compass or pencil and string to draw a series of concentric rings around the hole-to-be, spaced not more than an inch apart, up to the diameter of the largest gong you expect to make. These will allow easy centering disks of different sizes over the hole when hammering time comes.
You’ll also need to locate the center of the flat disk, if it’s not already somehow marked. There are various ways to do this. One simple method is to take half the diameter and measure that distance from several points along the side to locate the point in the center at which the measurements agree.
Rather than hammering directly on the aluminum, you may find it preferable to use a thick hardwood dowel of about 8” long with one end rounded. (A section of broomstick works well.) Place the rounded end of the dowel at the disk’s center point and hammer the end of the dowel. For smaller gongs calling for a smaller nipple, you can substitute something like a 1/2” or 3/8” steel rod with rounded end.
Hearing protection in the form of ear plugs or ear muffs is recommended during the hammering process. With the flat disk centered over the hole and the dowel positioned at the center point, begin hammering. With 3/32” aluminum, make your strokes moderately firm but not hard. With thicker material, you can strike a bit harder. After each stroke or two, lift the gong by its suspension cords and strike at the center with a suitable mallet to test the pitch of the gong. The pitch rises quite fast with the first two or three strokes, then slower as you continue. Repeat hammering and testing until the gong has risen to the desired pitch. Try not to overshoot and bring the gong up too high in pitch: while it’s possible to turn the gong over and carefully hammer back the other way to bring the pitch back down, too much of this will tend to create irregularities in the nipple shape which lead to beating effects (a slight waffling in pitch or volume) in the finished gong.
Mounting:
At this point you may need to replace the fine string used for suspension during hammering with something more durable. Make a loop of cord through each hole large enough to accommodate whatever you’ll be suspending from. You can suspend the gongs from whatever you find suitable for the purpose: hang them from a convenient tree branch, use microphone boom stands, or design a nice frame. But here’s an important consideration: when the gong is suspended, the suspension cords should not lie flat against the surface of the gong. If they do, they will rattle when the gong is played. To avoid this, the cords should angle upward and out from the suspension hole. Typically this means that whatever they’re hanging from – whatever the loop is looped over – should not be too skinny; it should be wide enough to spread the top of the looped cord out a couple of inches.
That’s it. Once mounted, the gong is done. And you’ll find that while a single gong is nice, a set of gongs tuned to several different pitches is that much more delightful still.
The follow-up to this essay has been posted here. It describes a more sophisticated approach to the tuning of disk gongs, taking into account the relationships between the overtones which affect the tone quality in subtle but important ways.
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| Introduction of Aluminum Circle Price and Thickness |
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Posted by: Keganhirl - 04-15-2019, 09:47 AM - Forum: Knowledge & Technique
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A lot of people have a tendency to feel that Aluminum Circle Price change with depth of this circle. From their perspective, the thinner a part of aluminum ring is also the more complex manufacturing process it requires, and so the greater is its cost. But, it's sometimes not the situation.
![[Image: aluminumcircle17.jpg]](http://www.aluminumcircle.com/aluminum-circle-images/aluminum-circle/aluminumcircle17.jpg)
Aluminum Circle China cost does have something related to depth of this ring. Broadly, circles of shared thickness (between 1.0mm and 8.0mm) have comparable costs under the state that they demand similar manufacturing procedures. Such Aluminum Disks can be gotten through relatively simple procedures. But if the thickness exceeds 8mm, the purchase price will go higher since the circles must experience hot rolling, which entails raw material loss and use of additional gear. For that reason, it is sensible to believe that aluminum circle cost is linked to depth. Regardless of that, there are still exceptions. As said previously, the purchase price of an aluminum ring can also be affected by its production procedure. Not all lean circles (thickness under 8.0mm) are made through chilly rolling, some demand hot rolling, which raises their price and finally impacts their cost.
It is worth mentioning that lean aluminum bands often possess flatness issues. If you'd like circles of satisfying flatness, you would better pick large trusted providers like haomei Aluminum.
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| What Exactly Are Tips for Aluminum Circle Packing? |
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Posted by: Keganhirl - 04-15-2019, 09:45 AM - Forum: aluminium faq
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Aluminum Circle packaging turns out to be essential because improper packaging may lead to harm, deformation or oxidation of aluminum bands. Then what exactly are cautions for packaging of Aluminum Circle for Kettle?
![[Image: aluminumcircle12.JPG]](http://www.aluminumcircle.com/aluminum-circle-images/aluminum-circle/aluminumcircle12.JPG)
First, tic-tac-toe frame is generally chosen for aluminum disc packaging. The framework consists of four wooden bars, two mended above and the other two below. The top bars must be produced into arches and fixed by means of bolts. The height of reduced bars need to meet prerequisites for forklift. These pubs are also fastened with bolts, which should be under the top arches so that packaged circles won't be damaged. Secondly, it's required to wrap aluminum bands with a layer of cloth with medium property or weak acid prior to placing packaging sheet to the fabric. Connecting components must be fixed with packaging tapes. Third, wrap heaps of drying and circles agents with plastic cloth which needs to be sealed with packaging tapes. All of possible openings must be sealed. Fourth, put packed Aluminum Circles China into the tic-tac-toe framework which is to be secured again by metal ropes. Then stick a box label onto each stack. The label should display weight load, packaging cost, delivery techniques, unpacking manners and other necessary warnings.
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| How To Clean Aluminum Circle Disc Correctly? |
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Posted by: Keganhirl - 04-15-2019, 09:43 AM - Forum: aluminium faq
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The use of Aluminum Circle disk in our own life is quite extensive, such as the usage of sound gear, cookware utensils, light and other components are produced from aluminum bands, cleaning system is improper can cause varying amounts of harm to it.
![[Image: Surface.JPG]](http://www.aluminumcircle.com/aluminum-circle-images/aluminum-circle/Surface.JPG)
The technique of cleaning aluminum ring disk by China professional aluminum goods maker.
Second, wash the face with a large Quantity of water to scrub off the stolen goods onto the face of the spinning Aluminium ring;
Eventually, assess the surface of the Aluminum Rounded Circles, to see whether there's absolutely no clean area, for this particular place from the crucial cleaning, be aware that washed up, rinse cleaned with water.
Additionally note which don't wash the comparatively large temperature of Aluminum Discs, since the water is too speedy evaporation will be bad for the surface of the paint, using detergent, we have to decide on a neutral detergent, or can corrode the surface of it.
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| What is Diamond Plate Aluminum, and What Is It Used For? |
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Posted by: aadaasdark8072 - 04-15-2019, 03:44 AM - Forum: aluminium faq
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diamond plate aluminum — the perfect material for any industrial job site application. Looking to keep your workers safe on the job? Diamond plate aluminum can be an excellent, durable option to reduce slips and falls throughout your job site.
Diamond plate, also referred to as checker plate or tread plate, is a type of metal typically made from either aluminum or steel. It’s called diamond plate due to the raised, diamond-shaped lines that criss-cross at 90-degree angles.
How It’s Made
There are two ways for diamond plate aluminum to be made.
Stamped. The aluminum is rolled between two giant rollers: one smooth, and one with the diamond pattern. The pressure allows the diamond pattern on one side to be transferred.
Electronic thermal machine. With this type of machine, the aluminum goes is first flash heated, making it molten, before it cools into the diamond shape.
Through either process, the combination of heat and pressure are used to create the desired thickness. Diamond plate aluminum will always be characterized by one smooth side, while the other is textured.
![[Image: aluminum_tread_checkered_plate%20(72).jpg]](http://www.aluminium-checker-plate.com/uploads/DiamondSheet/aluminum_tread_checkered_plate%20(72).jpg)
Benefits & Uses
Using diamond plate aluminum for your next project may prove to be beneficial. Here are some of its benefits.
Slip resistant. The raised diamond pattern provides traction that makes this material a popular option for steps, ramps, ladders, floors, running boards, loading docks, etc.
Corrosion resistant. Aluminum is known for its ability to withstand the elements due to its resistance to corrosion.
Hygienic. diamond plate aluminum is easy to wash and can stand up to harsh chemicals and cleaning products. This is one reason diamond plate is used in walk-in refrigerators, industrial kitchens, and washrooms.
Attractive. This type of aluminum can also be used for a more ornamental purpose, with various raised patterns and finishes available.
Diamond plate aluminum can also be found in parking lots, garages, elevators, handicapped access ramps, and more.
At haomei aluminium we have diamond plate aluminum available varying in length and thickness. It can be customized to fit the size of your project right here in our facility. No matter how big or small your project, we will only give you the amount of diamond plate that you need, reducing the waste of leftover material. Contact us today to place your order! alu@haomeicn.com
If you have any question or you want to know more about the checker plate and Tread Plate, you can send us the E-mail via alu@haomeicn.com . We are pleasure to receive your E-mail and hope the cooperation with you.
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| Common knowledge of aluminum profiles that you may not know |
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Posted by: Lilyfly - 04-09-2019, 09:56 AM - Forum: Selling Leads
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As we all know, aluminum profile is a downstream processing product of the aluminum industry chain. The main raw materials it purchases are aluminum bars and electrolytic aluminum. Aluminum bars obtain aluminum materials with different cross-sectional shapes through hot melting and extrusion. Its production process is also being continuously improved. It is a kind of metal raw material widely used in all walks of life in modern times.
Yonglian Aluminum profiles are divided into uses:
1. architectural aluminum profile: mainly used in the construction field with doors and windows and curtain wall materials.
2. industrial aluminum profiles: mainly used in aerospace, rail transportation, mechanical equipment, electronic products and aluminum profiles for general industries.
Aluminum profiles are divided into anodic oxidation, colored profiles, electrophoretic painted profiles, powder sprayed profiles, fluorocarbon painted profiles, heat-insulating and energy-saving profiles, wood grain profiles, and aluminum-wood composite profiles according to surface treatment methods.
Judging from the application range of aluminum profiles, aluminum profiles have the advantages of one-time extrusion molding, higher mechanical and physical properties, good thermal conductivity and higher specific strength, etc. Suitable for machine frames, supports, doors, industrial automation equipment, factory and office workstations, shelves, containers, ladders, etc. The aluminum profile should almost include the industrial sector, so the application range is not extensive!
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![[Image: 1500271783353151.jpg]](http://www.huadongrivets.com/uploadfile/20170717/1500271783353151.jpg)
![[Image: aluminum_diamond_plate_image_01.jpg]](http://www.aluminum-diamond-plates.com/aluminum-diamond-plate-images/aluminum_diamond_plate_image_01.jpg)
![[Image: aluminum-sun-room-kits-profiles-3.jpg]](https://guangyuan-alum.com/UploadFiles/Images/aluminum-sun-room-kits-profiles-3.jpg)
![[Image: aluminum-sun-room-kits-profiles-1.jpg]](https://guangyuan-alum.com/UploadFiles/Images/aluminum-sun-room-kits-profiles-1.jpg)