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
DIY vs Hiring a Concrete Cutting Service – including a Step by Step Guide There is a vast variety of concrete saws and equipment that can be hired to do that pesky DIY project that you have always wanted to get done. But when should
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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.
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DIY vs Hiring a Concrete Cutting Service – including a Step by Step Guide
There is a vast variety of concrete saws and equipment that can be hired to do that pesky DIY project that you have always wanted to get done. But when should you hire a professional and when should you just give it a crack? To do your concrete cutting or core drilling job properly and on budget you will need: the right equipment, the right type – wet or dry, the right protection for yourself and the environment, the right skills and the right value for money. There is lots to consider, but if you read on and follow this step by step guide we can explore this in a little more detail.
Step 1.Choose the right equipment: For gener slab cutting Brisbane you will need a Floor Saw or Kwik Cut Saw (Hand Saw). This process is used when reasonably level and flat surfaces have to be cut and includes cutting through reinforced concrete, precast concrete, and other structural materials.
These surfaces include floors, roofs, bridge decks and suspended slabs. The surfaces are usually cut to provide expansion joints, to make openings for ducts, elevators, stairwells, machine pads, trenching and for demolition purposes.
For wall sawing Brisbane you will need a Kwik Cut Saw (Hand Saw) or Ring Saw. This process is used for the cutting of openings in vertical surfaces and surfaces with slopes so great that floor saws cannot be used.
These surfaces are usually cut to provide for doors, windows, vaults, silos, chests, foundations, ducts or large diameter pipes, or to remove part or all of existing walls. For core drilling Brisbane through a floor or wall you will need a core drill. Core drills can usually drill holes from 25mm dia – 660mm dia. This process is used for the drilling of circular holes in reinforced concrete, precast concrete, asphalt, brick, cinderblock and other structural materials. Usually the holes are made for electrical, plumbing, heating, sewer and sprinkler installations. Other applications include holes to anchor bolts or lifting rods, to place explosive charges, to install load carrying devices, or for analysis of the structure of the rock.
Step 2. Wet or Dry cutting? I don’t mean to scare you here, but cutting concrete can be very messy. You can probably figure out that the dry cutting means cutting without water and should be less messy… hmm not so sure. Cutting without water means dust and lots of it. Very messy, minute particles of concrete will billow into a thick cloud of grey concrete dust or red brick dust and coat everything nearby you own. Personally I prefer the wet cutting machines. Even though the mess is wet grey or red slurry, it is much easier to clean up all the mess with a wetvac (wet and dry vacuum cleaner) and a wipe over with a damp cloth. Dust on the other hand can get absolutely everywhere.
Step 3. Protect yourself and the environment. Basic safety equipment you will need include goggles, ear plugs, safety boots/steel capped gumboots and gloves. If you have chosen a dry cutting machine you will also need to work with a dust mask on to protect your lungs, and sun protection and long sleeves if you are working outside.
Cutting concrete can be very noisy so be mindful of neighbors and nearby businesses in case of noise pollution and air pollution. Think about what is below you if you are cutting on a floor higher than ground floor. Sadly I have heard of some terrible injuries because of falling cores and no safety barriers. Protect the environment with plastic sheeting, extraction fans and a wet/dry vacuum cleaner. In many countries, letting waste such as concrete slurry go down the drain is against the law and you will be fined.
Step 4. Check if you have the right skills. There are many dangers associated with concrete cutting equipment. Even though this equipment can be readily hired, this equipment should only be operated by experienced personnel. You won’t need to google ‘saw injuries’ to imagine the dangers of operating such powerful equipment without the right know how and strength.
Step 5. Check out the cost. Believe it or not the cost to hire a skilled professional who has all the equipment needed and can get the job done with minimal fuss, is often not much more than hiring the equipment yourself. Aside from the safety risk, mistakes in concrete are expensive if you get it wrong. Before you go ahead with the hire, at least get an idea of price from a professional by obtaining a quote.
For example you may be surprised to know that at elliottandfyfe.com.au you can hire a Brisbane concrete cutting operator to do a basic job for about $150.00. That’s hardly more than the cost of hiring the concrete cutting equipment, and comes with a skilled operator to do the hard work. Might just be worth the call?
Shaun McCabe Elliott and Fyfe Concrete Cutting Service – Brisbane. For an obligation free quote on any job call 07 3806 9100 or 0411 554 737.
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