26 / 04 / 2016 | Videos

DIY Sandblaster

Here we are with another brand new structure by the ‘make it extreme’ team, a Sandblaster. 

This structure is capable for multiple uses such as removing the rust from old objects and coatings as well as writing on many different kinds of materials like glass, stone and others. 

Our own design of the particular structure aims to recycle the sand in order to be able to use it more than once. Thus, we used two tanks to reach this particular outcome as when the one tank is in use for sandblasting the other one which is not in use, it will be able to keep the sand in it. Therefore, after the sand is ran out from the tank which was used for sandblasting and with the help of some valves the function is reversed by carrying out the same process with the second tank this time. In the future, we are planning to make a recycling system for the sand, as well. 

To create the two tanks, first we took four tanks of domestic LPG (liquefied petroleum gas) to cut them and then, we made two larger ones. Our tanks are linked with screws in the middle in order to enable us to access their inside surface, if it is necessary. 

The air is inserted by a robe which is connected with an air compressor and it passes through with the help of a pressure regulator. Then, the air in the tank pressures the sand and another supply connects with the valve, in which the sand is mingled with the air (mixing valve) and next, it moves towards the sandblaster gun within a robe. Therefore, opening the valve we realize that the sand comes out of it in a great speed and hitting our object we have the outcome that we just mentioned above. The inlet of our tank, where the sand is inserted, it opens when the pressure of the tank is in zero and automatically, closes when the air is inserted in our tank. This fact makes the placement of the sand and our sand blaster extremely easy to use. 

The indications regarding the pressure applied in our tanks are showed by two pressure gauges that each one is placed per tank. Also, for safety issues, we placed two safety air valves 12 bar on our tanks as well as two exhaust valves that remove the air from the tanks when is necessary. 

To make our sand bluster even easier to use, four wheels have been placed to become a movable tool, easy to be used in our workplace, too. 

Reaching pressures of 8 bar from our compressor, our sand bluster works great and it has excellent results. Also, putting some water in our tanks, we can clean our place from dirt that cannot be easily removed with the water pressure in our home. In addition, putting some sand in one of the two tanks and water in the other we can transform our structure into a hydro-sand blaster in no time… 

Finally, our structure with number 0033 is added in our work lab as another brilliant tool.


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17 / 04 / 2016 | Videos

DIY Spot Welder

The new project of make it extreme is the transformation of an old microwave oven into a brand new spot welder. How did we manage that? Firstly, we decomposed the microwave oven and took its transformer and the fan that cools it. 

The particular project was planned not to make a portable spot welder but one with a stable basis.
Therefore, we made a metallic frame with a stable basis to support it and we also made some holes on it in order to be able to be screwed on the spot where it will be located. After that, we removed the one copper coil of the transformer and we passed a single coil of a copper cable through the frame, 16mm thick in order to reduce the volt and increase the ampere. Regarding the edges of the cable, we made two copper spikes 25mm of thickness. Then, we placed the cables with the transformer on the metallic frame and after that, we put the spikes on two calipers. The one caliper that is located on the frame remains still while the caliper which is on the upper side opens and closes by just a simple touch on a stepper that we placed on the basis of our machine. Thus, by just stepping on this stepper the calipers close and come together enabling the electricity to permeate the spikes. 

Additionally, a spring was placed on the moveable caliper that brings it back to its original position when we release the stepper. To regulate the pressure between the spikes, we placed a mechanism with a spring on our stepper that keeps the stepper moving even if the spikes come together.  

On the upper side of our machine we placed the control panel that regulates the thickness of the pieces of the iron plate that we need to glue together. On the control panel, we made a timer relay switch that defines the time needed for the weld and as it is commonly known when we glue thicker objects more time is required. Therefore, we have the potential to define the time needed according to the thickness of the material that we glue aiming to the desired outcome. Beside the timer, there are also two indicative lights and a switch on the control panel. When the stepper of our machine is not pressed, then the red light is pressed indicating the machine is not ready to start the weld. However, when we press the stepper and the light is not red anymore but becomes green, we know that it is ready to start the weld. Starting the weld and pressing the stepper, electricity permeates the spikes as well as the metal sheets that we need to glue within the time period that is set. 

Therefore, the weld is carried out through a safe, controlled procedure. Moreover, the fan that we took from the microwave oven and we placed it behind the transformer keeps the transformer’s temperature low enabling us during the weld process to carry on gluing endlessly.


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05 / 04 / 2016 | Videos

DIY Barbecue Table

The other day, while I was discussing with my uncle I got inspired by his words and so, I made this barbecue table

The philosophy of this table is that anyone can bake whatever he wants and for as long as he needs to make his food. However, a few problems arose creating it such as the overheat, the weight and the decay due to external factors like the weather conditions. 

The capacity of the table should be for 12 people, so the large length of our manufacture (250cm x 120cm) needed a metallic frame from the inside in order to prevent any deformations because of the excessive weight of this table. 

Therefore, we made a metallic frame using a square hollow section known as square tubes 60mm x 60mm, 220cm length and 100cm width with four legs 73cm tall. At the central point of this frame, it was made a socket to place the barbecue. Then, the whole top surface of the frame was lined with cement board which is used for fire safety. Regarding the final surface of the table, we used marine plywood which is water resistant as well as to the rest frame, we used the same kind of wood. At the central point under the table, a wooden box was made that covers the barbecue in order to protect the user from the high temperatures that are being increased. Thus, to increase the performance of our structure and to protect this wooden box, we lined the internal side of the box with Rockwool, which is heat insulating material and then we also placed cement board for fire safety. 

The barbecue has the potential to be removed and put back to its place in order to be able to be easily, cleaned. The edge of the top surface remained to the natural colour of the wood while the rest of it became black. Then, the whole table became clear varnished. Additionally, we should mention that on the days, when the table won’t be used as a barbecue, we made a wooden cover to be put on it in order to make it seem as a common table.

After completing our manufacture and testing it, we remained satisfied from the outcome as there was no increase of the temperature in spots where we needed to be heat insulated. We were pleased realizing that with a very few coals, we could bake our food on our barbecue table for three hours or may be more. The only expected problem that we faced was the smoke that was caused by the baking. Although, this may lead us to another manufacture, which will be an extractor fan to collect the smoke that will be gathered by the table. 

Finally, we would like to thank all the ‘make it extreme’ friends for their help and support and for the great company!


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