Automatic Block Making Machine Manufacturers: What to Verify in the Line

Automatic block making machine manufacturers sell two different things, and the difference decides what you must verify before you sign. One type builds a forming machine. The other builds a line: batching, forming, pallet return, palletising, curing and packing, sized from 30,000 to 250,000 pieces per 8 hour shift according to the main machine fitted. If the quotation covers only the moulding unit, the rest of the line has not been priced, checked or proved. This page lists the parts a line supplier should be able to answer for, with the numbers to ask for.

1. Machine sellers and line suppliers are two different businesses

A machine seller's scope is one unit with a power rating and a weight. A line supplier's scope is the whole flow. Count six subsystems before you compare anything: batching and mixing, forming, pallet return, palletising, curing, and packing. A line price that lists fewer than six is a partial offer, even when it carries the word turnkey.

Ask for the machine list behind the price, with the installed power and the footprint of each station. Output follows the main machine: a QST8-15 line is rated 90,000 standard bricks in an 8 hour shift and a QST1800 line 220,000, while the lines we build cover 30,000 to 250,000 pieces per shift depending on the machine you fit. Treat that rating as a ceiling. Plan real output at 70% to 80% of the nameplate. Ask which company supplies each station and who signs the acceptance test, because a line assembled from six suppliers carries six warranty paths.

2. Subsystem power has to add up before the line does

Installed power is where a line quotation either holds or fails. A twin shaft mixer from the QS-1200 series runs from 25.5 kW to 75 kW and weighs 4,000 to 9,080 kg depending on the model. It accepts aggregate up to 80 mm of pebble or 60 mm of crushed stone, which sets the feed size the rest of the line has to handle.

Then add the handling. Our palletising machines are 15 kW, 29 kW, 34.15 kW and 44 to 45 kW across four models, and the strapping units run 2 kW to 3.1 kW. The forming machine itself spans 22.9 kW on a QT4-15 up to 104 kW on a QST1800. Put the largest of each together and the installed total passes 220 kW before lighting, compressors or dust control. That total, not the nameplate of the forming machine, sizes the incoming supply and the transformer.

3. The control layer that runs the sequence

A line is a sequence, and the sequence lives in the control layer. On our lines that is a central computer plus a PLC with sensors closing the loop at each station: level in the mixer, position on the pallet return, layer count and stack height at the palletiser, board position at the feeder. The sequence is what stops a stopped mixer from filling the moulding machine.

Ask how the transfer car is powered, because there are two routes and they behave differently. The first is a rail system: 380 V AC on the track, stepped down to 36 V DC inside the car. The second is a lithium pack at 36 V with a BMS and an automatic charging dock. Ask for the position of the transformer or the dock in the layout, the charging time, and what the line does if the car arrives late.

4. A new line, or a retrofit around the machine you own

A line does not have to arrive with a new forming machine. Our lines interface with any make and any model, so you can keep a machine that still runs and buy the handling, the control layer and the packing around it. In a retrofit the existing palletiser can keep working, which keeps part of the investment and part of a cycle already proven on your site.

The interfaces are the real work. Pallet size decides the return conveyor and the feeder: 980 x 860 x 22 mm on a machine of the QST8-15 class, 1,350 x 880 x 25 mm on a QST1200. Cycle time has to match, 15 to 25 seconds depending on model, and the board feeder runs at about 13 seconds per board. Measure those three before ordering, and check the foundation loads for every new station.

5. How to verify an automation claim before you pay

Verification is arithmetic, not trust. Ask for the palletising cycle in seconds per layer, the stack height limit, and the board feed cycle. Our four palletising models run 12 to 18 seconds per layer, stack to 1,400 mm, and cover a 1,000 to 1,200 mm footprint, with the automatic board feeder cycling at about 13 seconds. All of those can be measured with a stopwatch.

Then request the evidence. A video of the model you are buying, filmed in one take across a full shift and showing the cycle and the reject count, is worth more than a rendering. A trial report from a no-load run and then a loaded run on the same unit is better still. If a supplier can only show a brochure figure with no serial number behind it, keep the number unverified until the acceptance test.

6. Commissioning, spares, remote support, and the red flags

Before shipment, the whole line should run empty and then with material, on the same control program that ships with it. Record the serial number of every unit in the delivery documents, not only the forming machine. Ask for the wear parts list with sizes: moulds, pallets, vibration motors, hydraulic seals, belts. The acceptance test should name the cycle, the stack height and the reject count you will measure on site.

Remote support has prerequisites, and it is fair to write them down: a data connection at the control cabinet, remote access permission, machine logs, and a person standing at the panel with a phone during the session. Training covers the cycle at the operator panel, mould change, and hydraulic pressure checks at 31.5 MPa. We build 64 machine models and hand over complete lines, with ISO 9001 and listing 687416 behind the documents.

• A line price with no palletising and no curing in the scope. Those two stations carry a large share of the installed power and the floor area, so leaving them out moves the real cost, not the quotation.
• No layout drawing and no foundation loads. The drawing is how a supplier proves the line fits your plot and your incoming supply.
• A transfer car power scheme with no charging design: a battery with no dock, or a rail pickup with no transformer listed.