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Using a Doubell DIY machine can be broken into 2 simple sections -

  • MIXING
  • MAKING

The Mixing guide is that same for all Doubell Machines & is found together with good hints & tips for brick & block making below.

 

 

Here is a quick online reference:

HOW DO I MIX?

Whatever aggregate you use, whether it is river sand, crushed stone, grit or even ash, you will need to add cement and water to the mix in order to make it set into an acceptable building unit or paver. Mixing can be easily done using a spade or even a coal fork. You will get the correct proportions from your instructions but as an example we will use an 8 to 1 mix as in the simple pictures here.

A builders barrow carries about 100 kg of sand, so if we were to take 4 barrows = (400kg sand), we will need 50kg of cement to get an 8 : 1 ratio. Firstly tip the sand onto a clean hard surface. Spread it out and then add your pocket of cement (50kg). Mix the two together firstly without water. When mixed, add the water (about) 18 to 20 litres. (no fixed quantity) you'll have to work by trial and error, to get your mix damp to wet, but not sloppy. ' the same texture as when making sand castles at the beach' semi-dry.'

Your mixture is now ready to load into your machine. You could of course use a pan mixer, if available, but preferably not a concrete mixer, since this tends to make a lumpy mixture. You will soon get the hang of it.

Doubell machines diy brick making equipment
Doubell machines diy brick making equipment

HOW DO I PRODUCE?

AND NOW COMES THE SIMPLE PART - MAKING BRICKS, BLOCKS OR PAVERS.

You have a mould section (blue) and a tamper frame (red). Load your ready mix into the mould box and using a hand shovel (provided), level of to the top of the dividing plates / or cavity tops in the case of cavity blocks. Now place the tamper into its position on top of the mould rotate it from left to right, even allowing the base of the frame to touch the ground . Then with a light up and down (piston like action) stroke, you compress the mix in the box until the base of the frame touches the ground. At this point you cannot compress any further since the fame not allow you to do so. Now, place your feet onto the base of the frame, take hold of the handles on the mould box (blue) and pull the box upward, which leaves the block neatly on the surface where it was made. Move the machine one space toward yourself and repeat. The whole cycle takes about 20 seconds.

WHEN DO I STACK?

RULE: WHAT YOU PRODUCE TODAY , YOU CAN STACK TOMORROW MORNING

You can stack as high as you can reach for convenience but just don't mix up the units, since it will be difficult to tell how old the bricks or blocks are. You must keep them damp or even wet for at least 8 days.

Water cures bricks and so if they dry out too early, the hardening process will stop, and cannot be restarted. It is better not to use or sell the bricks before the 10th day after production.

Doubell machines diy brick making equipment

For more information, contact us with your query.