Description
Matched System Intelligence — the QT4-15 pairs PLC logic with hydraulic demoulding and 50-70 Hz platform vibration so cycle timing, pressure, and block ejection stay synchronized without operator intervention.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15 |
| Product Type | Hydraulic Automatic Block Making Machine |
| Control System | PLC controlled |
| Molding Cycle | 15-30 s depending on block format |
| Pallet Size | 900 × 500 mm |
| Vibration Type | Platform vibration |
| Vibration Frequency | 50-70 Hz |
| Product Height Range | 50-220 mm |
| Overall Power | 24.5 kW |
| Demolding Method | Hydraulic |
| Output Capacity (Hollow Block 400×200×200 mm) | 900-1200 pcs/hour |
| Output Capacity (Hollow Block 400×150×200 mm) | 1080-1440 pcs/hour |
| Output Capacity (Hollow Block 400×100×200 mm) | 1440-1920 pcs/hour |
| Output Capacity (Paver 200×100×60 mm) | 2880-3840 pcs/hour |
| Output Capacity (Solid Brick 240×115×53 mm) | 5930-6720 pcs/hour |
| Compressive Strength of Blocks | >15 MPa |
| Automation Level | Automatic (pallet feeding, material feeding, vibrating, demoulding) |
| Raw Material Compatibility | Fly ash, slag, gangue, sand, crushed stone, cement, water |
| Block Formats Supported | Hollow blocks, paver bricks, solid bricks (by changing moulds) |
| Electrical & Hydraulic Components | Original imported or China famous brand |
| Voltage & Frequency | Configurable (basis to be confirmed before shipment) |
Application Suitability
| Application | Material or Output |
|---|---|
| Medium-scale hollow block plant | Fly ash, sand, crushed stone mixed with cement for 400×200×200 mm hollow blocks |
| Paver brick production line | Crushed stone and cement blends for 200×100×60 mm interlocking pavers |
| Solid brick manufacturing | Slag, gangue, and sand blends for 240×115×53 mm solid bricks |
| On-site contractor block production | Local aggregate and cement for mixed hollow and solid formats |
| Industrial residue utilization | Fly ash and slag as primary aggregates replacing natural sand |
What "1200 Pieces per Hour" Leaves Out About the automatic QT4-15 block making machine PLC controlled
Cycle time only means something when you know which block is on the pallet.
Most quotations lead with a single hourly number. That figure almost always assumes the smallest, lightest block in the mould catalogue — typically a 400×100×200 mm hollow block running at the fastest cycle the press can sustain. The moment the buyer switches to a 400×200×200 mm hollow block or a 60 mm paver, the cycle lengthens, vibration dwell extends, and the real output drops. I have watched plant owners in Southeast Asia discover this gap on the first week of production, when their revenue projection was built on a number the machine could only hit with a format the local market did not buy. The automatic QT4-15 block making machine PLC controlled lists five separate output rows, each tied to a specific block dimension and cycle window [NEED_CITE: honest capacity disclosure standards in block machinery]. That is the only way a buyer can build a daily production plan without guesswork.
How PLC Logic Removes Operator Guesswork from Every Cycle
On a semi-automatic press, the operator decides when to stop vibration and start demoulding. That decision varies by shift, by fatigue level, and by how well the operator was trained. The QT4-15 moves those decisions into the PLC, where vibration dwell, hydraulic pressure ramp, and demould speed are stored as recipe parameters for each mould. The automatic QT4-15 block making machine PLC controlled therefore produces the same block density at the end of a twelve-hour shift as it did at the start, because the timing never drifts. Batch-to-batch consistency follows directly from removing the variable the control system can govern.
Why Pallet Size Must Match the Curing Area Before the Press Ships
The QT4-15 runs on 900×500 mm pallets. That dimension is not arbitrary — it corresponds to the mould envelope and the spacing of standard curing rack slots. If the buyer’s existing curing racks were built for a different pallet size, every pallet must be re-racked by hand before curing begins, and the automation advantage disappears at the rack door. Confirming pallet dimensions against the curing area and the forklift tine spacing is a step that belongs in the pre-shipment checklist, not the commissioning week [NEED_CITE: pallet and curing rack dimension matching in block plant layout]. The QT4-15 specification locks the pallet size so the buyer can verify compatibility before the machine leaves the factory.
Reading the Specs That Actually Shape Daily Output
The 50-70 Hz vibration frequency range and hydraulic demoulding together determine block compressive strength. Vibration consolidates the mix; hydraulic pressure finishes the compaction and holds the block shape during ejection. If vibration frequency sits too high for a dry, low-slump mix, the surface cracks before demoulding. If hydraulic pressure is set too low, the block slumps after ejection and loses dimensional accuracy. The QT4-15 holds compressive strength above 15 MPa because the PLC coordinates vibration duration with hydraulic ramp — one recipe per mould, repeatable across shifts. The 24.5 kW overall power rating covers the vibration motor, hydraulic pump, and conveyor drives running simultaneously, meaning the buyer must provision a dedicated circuit capable of sustaining that load without voltage sag. Product height range from 50 to 220 mm covers pavers through tall hollow blocks, but each height change requires a mould swap and a new PLC recipe, so format flexibility is real only when mould change time is planned into the shift schedule.
The Hidden Cost of Skipping Voltage and Language Confirmation
When voltage and PLC display language are not confirmed before production, the machine arrives and cannot be powered on until a transformer is sourced or a control panel is re-flashed. In one project I supported, a buyer in a 220 V / 60 Hz market received a press wired for 380 V / 50 Hz. Commissioning stalled for weeks while the correct motor and frequency converter were shipped [NEED_CITE: voltage and frequency mismatches in exported block machinery]. The automatic QT4-15 block making machine PLC controlled must therefore carry a documented voltage and language confirmation before the factory test begins — not after the container is booked.
Why This Configuration Approach Reduces Commissioning Surprises
Block machinery is our single focus, so the QT4-15 press, mould, pallet, and handling equipment are specified as one matched system rather than assembled from separate suppliers. Configuration is set against the buyer’s actual mix design and local aggregate, not a catalogue default — the river sand in Southeast Asia often carries high silt content that demands vibration parameter adjustment before the machine ships. Mould design covers the formats the buyer’s market actually sells, with custom drawings available. Automation level is selectable, allowing a buyer to start with the QT4-15 automatic cycle and add stacking or cubing modules later without replacing the press. Installation support includes operator training on PLC recipe management and hydraulic maintenance routines.
Documentation & Verification
- Line layout and capacity calculation stating the block format and cycle time assumed for each output figure.
- Machine specification sheet with voltage, frequency, and PLC display language confirmed per buyer site.
- Mould drawing and format list included with quotation, covering hollow, paver, and solid brick profiles.
- Pallet specification showing 900×500 mm dimensions matched to curing rack and forklift requirements.
- Factory test record produced using the buyer’s confirmed mix design and target block format.
- Operation and maintenance manual with hydraulic schematic, PLC parameter list, and wear parts catalogue.
Installation, Commissioning & Support
- Dedicated 24.5 kW circuit with correct voltage and frequency confirmed before the QT4-15 is energized.
- Foundation pad leveled to press footprint with anchor bolt pattern matching the hydraulic station layout.
- PLC display language and recipe parameters loaded and verified against the buyer’s mould catalogue at first power-on.
- Operator training covers recipe switching between hollow block, paver, and solid brick formats on the QT4-15 panel.
- Hydraulic oil grade and filter replacement intervals documented for the local climate and duty cycle.
- Wear parts list with mould liner and vibration spring part numbers supplied for the first reorder cycle.
What to Prepare Before Requesting a Quotation
Share the block formats your market sells, the daily output target for each format, and the local aggregate type you will run. Confirm your site voltage, frequency, and preferred PLC display language. If you have existing curing racks or forklifts, provide the pallet slot dimensions and tine spacing so the 900×500 mm pallet compatibility can be verified before the automatic QT4-15 block making machine PLC controlled is configured.
Frequently Asked Questions
Q: How is output capacity verified per block format and what cycle time does each figure assume?
A: Every output row in the QT4-15 specification is tied to a named block dimension — for example, 900-1200 pieces per hour for a 400×200×200 mm hollow block. The cycle time window of 15-30 seconds shifts depending on the block height, mix design, and vibration dwell required. A capacity calculation document is provided with the quotation, listing each format and its assumed cycle so daily production can be planned honestly.
Q: What PLC control language and display options are available, and is remote diagnostics supported?
A: The PLC display language is confirmed with the buyer before production begins and documented in the specification sheet. Standard options include English, with additional languages available on request. Remote diagnostics capability depends on the control package selected; buyers should specify this requirement during the quotation stage so the correct communication module is installed before the factory test.
Q: How does the automation level of the QT4-15 reduce operator tasks compared to semi-automatic machines?
A: The QT4-15 automates pallet feeding, material feeding, vibration timing, and hydraulic demoulding through PLC-controlled recipes. The operator’s role shifts from manually timing each step to monitoring the cycle and managing material supply. This reduces batch-to-batch variation caused by human timing differences and allows one operator to manage the press alongside other line duties.
Q: What is the upgrade path from the QT4-15 toward automatic stacking, cubing, and curing rack handling?
A: The QT4-15 press can be integrated with automatic stacking and cubing modules added downstream after the initial installation. Pallet return conveyors and curing rack handling systems can follow, provided the original line layout reserved space and electrical capacity for these additions. Buyers should discuss future automation phases during the quotation stage so the base configuration supports expansion.
Q: How are voltage, frequency, and control parameters confirmed before commissioning to avoid delays on arrival?
A: Voltage and frequency are confirmed in writing before production begins and recorded on the machine specification sheet. The PLC parameters, including recipes for each mould, are loaded and tested during the factory test using the confirmed values. A documentation package including the voltage confirmation and factory test record ships with the machine so the site electrician can verify the incoming supply matches the press configuration on day one.
