Extrusion is a process used to create objects of a fixed cross-sectional profile, of solid round, square or rectangular shapes, to L shapes and T shapes, tubes and many other different types. Metal is pushed through a die of the desired shape using either a mechanical or hydraulic press, resulting in the finished product. The cavity in which the raw material is pressed is lined with a wear resistant material which can withstand the pressure that is created when the material is pushed through, making extrusion possible without deforming or tearing the metal.
Aluminium extrusion is generally used in the manufacture of windows, doors and balustrades, but is also found in thousands of other items like vehicle parts, truck trays, boats and other marine products and refrigeration, etc to name a few.
Two advantages of this technique over other manufacturing processes are its ability to create very complex cross-sections, plus being able to work materials that are brittle, because the material only encounters compressive and shear stresses. It also forms finished parts with an excellent surface finish. Extrusions often minimise the need for secondary machining. They are not of the same dimensional accuracy or surface finish as machined parts, however, the process produces a wide variety of cross-sections that are hard to produce cost-effectively using other methods.
Extrusion may be continuous (producing indefinitely long material), or semi-continuous (producing many pieces). The minimum thickness of steel is about 3mm, whereas aluminum and magnesium is about 1mm. The extrusion process can be done with the material hot or cold.
Metals that are commonly extruded:
* Aluminium is the most commonly extruded material and can be hot or cold extruded
* Brass is used to extrude corrosion free rods, automobile parts, pipe fittings, engineering parts
* Copper pipe, wire, rods, bars, tubes, and welding electrodes
* Lead and tin pipes, wire, tubes, and cable sheathing
* Magnesium is used in aircraft parts and nuclear industry parts, and is about as extrudable as aluminum
* Zinc rods, bars, tubes, hardware components, fittings and handrails
* Steel rods and tracks -Usually plain carbon steel is extruded, but alloy steel and stainless steel can also be extruded
* Titanium is often used in aircraft components including seat tracks, engine rings, and other structural parts.
Clean Metals for Recycling
The cleaner that a metal is when it’s taken into a scrap metal yard to sell, the better price it will fetch per kilo, as foreign matter is costly to clean off, so this product will always be penalised accordingly in terms of the price. By this we mean no concrete, screws, glass, paper or any other foreign material attached.
All the metal we buy is processed by cleaning any non-metallic off it as required, cutting it into smaller pieces, and then it is put through a baling press to maximise the weights for export to South East Asia, where it will be melted down and manufactured into new products.
The Extrusion Process
The process begins by heating the material (for hot or warm extrusion). It is then loaded into the container for pressing. A dummy block is placed behind it where the ram then presses the material to push it out of the die. Afterward, the extrusion is stretched in order to straighten it. If higher quality properties are required then it may be heat treated or cold worked.
Cold extrusion is done at or near room temperature. Advantages of this over hot extrusion are the lack of oxidation, higher strength due to cold working, closer tolerances, good surface finish, and fast extrusion speeds if the material is subject to heat for a short period.
If you are looking for aluminium extrustion recyclers in Brisbane, make sure you visit Frog Metals.
Sometimes, you may have noticed red and blue blood vessels visible through your skin. Have you been a bit embarrassed or worried about them? Have you wondered? They are known as spider veins. Here, we will discuss the causes and treatments of spider vein.
The causes of spider veins
Spider veins are a mild manifestation of venous reflux disease. They are small, tangled groups of blood vessels found just beneath the skin surface. These dilated veins resemble tree branches or spider webs, and are normally spread out around the legs and feet.
What are the risk factors?
Spider vein risk factors are like those associated with varicose veins, and include advancing age, occupations requiring extended periods of standing, obesity, hormonal changes and heredity factors (weak vessel walls). One can also experience this condition because of weak vessel walls or from exposure to ultraviolet rays.
Considering the risk factors, some people will be more prone to this problem than others. For example, if you work as a surgeon, a teacher or a nurse, the chances are higher that you could suffer from this condition. Similarly, if there is a family history of weak vein valves, the probability of developing spider veins is also high. The same applies regarding hormonal changes, which mainly occur during puberty, pregnancy and menopause.
The exact cause of spider veins not been strictly established. Existing risk factors can be divided into two general sub-divisions, i.e. congenital causes and acquired causes. In congenital causes, there port-wine stain, Maffucci’s syndrome and hereditary hemorrhagic telangiectasia (also known as osler-weber-rendu syndrome), among others. The acquired causes include acne rosacea, chemotherapy and lifestyle/occupation risk factors (as discussed above).
What symptoms are associated with spider veins?
Spider veins are painful in some cases, generally accompanying cramping and aching. They often result in a feeling of heaviness in the legs, and burning, throbbing or tingling sensations. In addition, symptoms such as swelling, fatigue and itching can also be experienced. In serious cases, this condition can establish ulcers, large sores and phlebitis. However, spider veins are noticed by their appearance in the majority of incidences.
Tests and Diagnosis
Doctors normally use non-invasive diagnostic tests to diagnose this condition. These tests are perfectly safe and painless, with no scalpels, needles or medication needing to be involved. The entire procedure is normally very brief, and generally won’t take more than an hour from start to finish.
There are three main things that doctors seek to answer with these tests. Firstly, they are seeking to establish any evidence of deep vein blood clots. Secondly, they discover if the veins are functioning properly. Lastly, they test the Greater Saphenous Vein (GSV) to determine whether it is working well or not.
A competent vein specialist will always undertake this exercise before treating your condition. Some of the procedures that you can expect include:
*Color-flow Duplex Exam – This is used to evaluate the anatomy of the affected veins. It determines the direction of blood flow, openings and blockages. This procedure is also important in the process of vein mapping (done for skin deep problems).
*Bi-directional Doppler Exam – This is an ultrasound exam used to determine the speed of blood flow and whether it pauses during normal breathing. It also seeks to identify whether the veins are working properly.
*Photoplethysmography – Phew! Don’t let this complicated medical term intimidate you. Photoplethysmography is basically a diagnostic procedure that is used to determine the efficiency of your calf muscle pump.
*Pressure Calf Exam – In performing this exam, you’ll be asked to lie facing upwards with your legs raised higher than your chest. This diagnostic procedure identifies vessel blockages.
After establishing the specific nature of your problem, the doctor can then outline the best treatment for you. There are several available options:
This treatment involves the doctor injecting a saline solution into the affected veins. This solution then damages the affected vessel walls, causing them to swell and seal shut. Eventually the scar tissue will fade away. The sclerotherapy procedure takes about thirty minutes, and has only mild side-effects. And although the injection may be a bit painful, the stinging sensation is usually gone within a few minutes.
Laser and Intense Pulsed Light
This treatment option employs the use of a specialized device that focuses laser energy to damaged tissue. The procedure will just take twenty minutes, and has minimal side-effects.
Using natural remedies can mean the difference between undergoing medical procedures or not, and are valuable alongside medical treatment. Some of the recommended herbal remedies include:
*Horse Chestnut Seed – Studies show that this seed helps to improve blood circulation in the legs thus strengthening the veins and capillaries.
*Bilberry Extract – This herbal extract stimulates new capillary formation thus strengthening the capillary walls.
*Butchers Broom – This herb strengthens veins.
*Gotu Kola – A very effective extract which addresses venous insufficiency, foot swelling and water retention. It therefore provides a good solution to spider veins found on the legs.
*Distilled Witch Hazel – This is directly applied on the affected areas using a cotton ball. Numerous clinical studies have shown that this extract can help strengthen blood vessels.
Caution: For health safety purposes, do not start using any herbal remedies without consulting a qualified doctor.
Spider veins prevention
Two of the most important things regarding the prevention of spider veins are eating well and getting regular exercise. Eating a diet higher in fresh, raw fruits and vegetables than meat and convenience food is important, and if your job requires you to stand for a long time, you should regularly shift your body weight from one leg to another as well as standing evenly balanced.
To sum things up, the procedure of a spider vein removal is chosen according to several key factors. Your specialist will determine the best treatment options based on the results obtained from the diagnostic tests. We hope that this article will provide all the necessary guidance you need in addressing this problem.
For more information about spider veins Brisbane, contact the leg vein doctor Brisbane today.
“I thought I was in a pretty good marriage with occasional arguments until my wife said to me “If the next year of our marriage is as bad as the last year, I’m outta here”.
She felt as if she was always walking on eggshells so as not to set me off. Any time she disagreed with me, I immediately went on the attack and tried to defeat her point of view by almost any means. So when she told me she had taken all she could stand, I took her seriously and decided that I had to do some frank soul searching to find out why I kept losing my temper, so I could not lose the person who meant the most to me in the world”.
As I looked back many of my habitual ways of dealing with the world were driven by anger. I was an aggressive driver, using my horn and my “freeway finger” whenever people weren’t travelling the way I thought they should be. If the mechanic told me something needed fixing on my car, I was sure he was exaggerating for his own financial gain. I thought I had an unusual ability to see through a hypocrite, and since I thought that most people were, I got a lot of practice of seeing through them.”
This is one story of a man who came to me for help in dealing with his anger problem.
As a Psychologist, I’ve seen many of my clients lose their jobs, wives and opportunities because they were simply not able to handle the normal frustrations and disappointments in life.
They argue, they insult and they sulk.
They come to see themselves as ineffective, unlucky, of just plain losers. They don’t admit this to anyone, but deep inside they don’t like themselves. Their anger gets in the way of their ability to be good bosses, good workers and good family men.
For many men who have been charged with serious crimes, such as assault and murder, it is clear that these are not pre-meditated. These men didn’t start out with the intention of hurting others.
They reacted impulsively, and often out of anger. Someone insulted them and they struck back. Situations they could have walked away from became major confrontations because they did not know how to handle themselves other than aggressively. They know their behaviour is stupid and they don’t know why they did what they did.
Domestic violence programs are over run. Our prisons are overcrowded and even our schools are not altogether safe. But men who are angry do have a choice. No-one can change the whole world, but there are many things you can change about the way you see yourself, others and the world, and come to understand what triggers your anger along with learning what other actions you can take to keep yourself and others safe. Your marriage, your job and your happiness depend on it.
Individualised anger management counselling is run by the Hart Centre Australia. We have qualified Psychologists in 60 locations around Australia who can help you become the man you want to be. Phone 1300830552 for more information on Anger management counselling and anger management courses.
It is important to store your makeup properly so it does not expire and become unusable. The primary reason that makeup spoils is that we cannot find it when we need it. Storing your makeup in a makeup organizer means that you will be able to locate the makeup when you need it saving you time and money.
Makeup is very expensive and if not used in time will expire and become unusable. The most common reason that makeup is not used is that you cannot find your makeup item when you need it so you simply forget about it. Organising your makeup so you can find it easily and when you need it will save you time and money. Here are some factors to consider when organising your makeup.
The makeup organizer must be functional and nice to look at Makeup organizers made from clear acrylic will be the best units as you will be able to see your make items through the clear material. This means that you will be able to locate the makeup item you are after quickly and easily and save you hours searching for your makeup items.
Another important consideration in the functionality of a makeup organizer is its drawer size. It is important that the organizer has a different drawer sizes so that even your oversized makeup items can be stored. Larger drawers sizes also mean that your makeup items can be stored upright ensuring that they do no leak or spill.
Some makeup organizers will have flip top compartments at the top of the units. This enables you to get your makeup items easily rather than using the drawers and is best suited for your makeup items that you use most often.
The size of your makeup collection will determine the number of drawers that you require for your makeup organizer. It is always a good idea to get the makeup organizer that is a little larger for your makeup collection as you will grow into the unit in no time.
Cost is a crucial factor in deciding which makeup organizer to purchase. There are a number of factors to consider when costing a makeup organizer. Generally the larger the unit the more expensive it will be. However, if you consider the cost of you makeup expiring before you get the chance to use it, the cost of a makeup organizer will pay for itself many times over.
The above are just some items to consider when choosing a makeup organizer. With this in mind it is important to get the best makeup organizer that suits your makeup collection.
The Makeup Box Shop’s Makeup Organizer is the best value in the market today. The Makeup Box Shop has Makeup Organizer for all your Makeup Storage needs.
Moodle is the world’s most popular learning management system. Moodle is flexible and scaleable software designed to help educators create interactive and collaborative online learning experiences. Moodle originated in Australia around a decade ago and has since been internationalised in more than 200 countries and 100 languages. The official community site has more than a million registered users.
There are many ways in which Moodle can be effectively used. These include
continuing professional development, the delivery of online courses, staff compliance, induction training and workplace assessment. Being open source software, there is a great deal of community support toward the development of third-party plugins to extend Moodle’s core functionality.
Moodle is free to use without licensing costs, however, it does take a degree of technical expertise to install, configure and secure the software on a web server. Once deployed, it can be easily managed by a qualified system administrator.
Moodle’s key administrative functions include the ability to control authentication, manage accounts, assign roles and permissions, change site appearance, automate course backups, perform bulk user actions and generate various reports. Moodle enables integration with external systems, e-commerce plugins and SCORM compliance. Moodle is proactive in terms of data security and information privacy of its users, hence, patches are released on a periodic basis and there are global settings that can be configured by the system administrator.
Course creators can add online activities and resources intended for their learners. Moodle’s standard activities include assignment, blog, chat, forum, messaging, quiz and wiki. The learning sequence may be totally non-linear or controlled so learners engage with online course objects in a predetermined fashion. User activity and course completion tracking are monitored, moreover, assessment grades and feedback can be reported in real-time via the internet.
Moodle enables online content to be distributed in various ways. Course participants can quickly upload existing files from their device, disk, or network. Using Moodle repositories, it is possible to import content and media from Cloud-based services such as Google Docs, YouTube, Flickr, Boxnet and Dropbox. On the same token, content can be export from Moodle to third-party services.
Assess, track and report on your learners via the web. Get started now and learn more today about Moodle Sydney, Moodle Brisbane and Moodle Melbourne providers.