How to choose a fly ash brick making machine

A fly ash brick machine is a long-term purchase. It sets how many bricks you can sell, how many people you need on the line and how consistent each brick is. Before you compare prices, settle these questions.

1. How many bricks do you need to sell each day?

Start from your market, not the machine. Count the builders, contractors and dealers within delivery distance and estimate what they buy in a month. Then work back to a daily figure for one shift. Buying far more capacity than you can sell ties up money in the machine and in unsold stock. Buying too little means turning away orders once you are known.

Plan for growth you can see, not growth you hope for. Many plants start on one shift and add a second shift before they add a second machine.

2. Manual, semi-automatic or automatic?

The level of automation decides how much labour you need and how much rests on operator skill. We cover the trade-offs in manual vs semi-automatic vs automatic block machines. In short:

• Manual and semi-automatic machines cost less and are simpler to repair, but need more hands and more supervision.
• Automatic machines with a PLC panel, batching and conveyor feed need fewer operators and give more consistent bricks. They need a steady three-phase supply and someone who can look after the hydraulics and electrics.

3. Hydraulic or mechanical pressing

Fly ash bricks get their strength from the mix and from compaction. A hydraulic press applies a set pressure on every cycle, which gives the same density from brick to brick. Mechanical and vibro-compaction machines are simpler and can suit smaller outputs. Ask the maker what pressure the machine applies, how it is controlled and how it holds that pressure as seals and moulds wear.

4. The moulds and products you want to sell

Most buyers want more than one product from the same machine. A good press takes different moulds for solid bricks, hollow blocks and paver blocks. Before you order, list the sizes your market uses. In many areas that means the traditional 230 × 110 × 75 mm brick or the modular 190 × 90 × 90 mm size, but check with local builders.

Mould steel and machining matter as much as the press. Worn moulds give bricks with uneven edges and sizes, which costs your customers extra mortar and plaster. Ask what the moulds are made of and what a replacement set costs.

5. Raw material handling

The press is only one part of the line. Fly ash, sand or stone dust, and lime or cement need to be measured and mixed the same way every batch. A pan mixer gives a more even mix than mixing by hand or in a drum, and batching by weight removes guesswork. If your fly ash arrives lumpy or wet, plan for screening too.

6. Power, space and water

• Power: add up the load of the whole line, not just the press, and check you can get a three-phase connection of that size.
• Space: the shed is small next to the curing and stacking yard. Fresh bricks need room to cure before dispatch.
• Water: fly ash bricks are water-cured rather than fired, so you need a reliable supply for curing as well as for the mix.

7. Installation, training and spares

Ask who installs the machine, who trains your operators and how quickly spare parts reach your site. Downtime in the first months usually comes from small things: a worn seal, a sensor, a hose. A maker who keeps spares and answers the phone is worth more than a small discount.

Talk it through before you buy

At Possible Machines we build fly ash brick machines at our works in Igatpuri, Nashik, from hydraulic presses to automatic lines. Tell us your raw material, the products you want to make and your daily target, and we will suggest a model. See the full range of machines or ask for a quote.