Description
Format-Specific Capacity Sizing — Every cycle time and output figure is calculated against the block format, pallet size and mould cavity count you actually sell, not a generic catalogue maximum.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT12-15 |
| Product Type | Hydraulic Block Making Machine |
| Total Installed Power | 62 kW |
| Pallet Dimensions | 1300 × 900 mm |
| Moulding Cycle | 15–30 seconds (varies by block format and mix design) |
| Vibration System | Table vibration with four-axis forced synchronization gear shaft |
| Vibration Acceleration | 20g |
| Vibration Force | 120 kN |
| Feeding Mechanism | 360° rotating press-in arch breaker |
| Noise Reduction | Flexible vibration reduction on pressure head; adjustable air bag on mould box |
| Supported Formats | Hollow block, solid block, pavement brick, slope protection brick, porous brick |
| Voltage | Configurable to buyer’s local industrial supply (basis to be confirmed) |
| Control System | PLC-based (brand and HMI language to be confirmed) |
| Standards | CE (certificate availability to be verified) |
Application Suitability
| Application | Material or Output |
|---|---|
| High-volume hollow block plant | Crushed stone, sand, cement blends with standard aggregate gradation |
| Paving block and kerbstone production | Fine aggregate mixes with colour pigment dosing |
| Interlocking brick for housing projects | Laterite, quarry dust and cement combinations |
| Porous brick for permeable surfaces | Graded coarse aggregate with controlled cement content |
| On-site block production for contractors | Locally sourced sand and gravel with site-batched cement |
Why the Cycle Time Quoted Rarely Matches the Pallet You Pull Off the Line
A single headline cycle number tells you nothing until it is tied to a specific block format, wall thickness and mix design.
Many buyers sign off on a QT12-15 block machine specifications sheet showing a 15-second cycle, then discover on commissioning day that hollow blocks with 15 mm walls need closer to 25 seconds to reach target density, while a thin paving brick can indeed run at the faster end. The gap between the quoted figure and the real daily output widens further when local aggregate carries higher clay content, forcing longer vibration to achieve compaction. I have watched plants lose an entire shift’s worth of output because the capacity calculation never named the block format it assumed. [NEED_CITE: block format assumptions in capacity quotations and daily output variance]
Matching the Vibration Profile to Your Target Block Format
The QT12-15 hydraulic block machine uses a four-axis forced synchronization gear shaft that drives both dynamic and static table sections in a controlled phase relationship. This arrangement keeps vibration energy uniform across the 1300 × 900 mm pallet surface, which matters when a single mould produces multiple cavities of a hollow block where corner density must match centre density. Frequency conversion on the drive lets the operator dial the acceleration from a gentle ramp for fragile interlocking profiles up to the full 20g for thick-walled load-bearing units. The adjustable air bag vibration reduction on the mould box isolates the structure from peak shock loads, extending mould life when running abrasive aggregate blends.
Confirming Pallet and Feeding Compatibility Before the Order Ships
The 1300 × 900 mm pallet is the dimension that locks in your curing rack spacing, forklift tine width and storage yard layout. Buyers who skip this check often find that existing racks built for 1100 × 850 mm pallets cannot accept the larger board without costly modification. On the feeding side, the 360° rotating press-in arch breaker prevents material bridging inside the hopper, a frequent problem when fine sand or quarry dust forms a dome over the feed gate. This mechanism keeps material flowing into the mould box at a consistent rate, which directly affects weight uniformity from one block to the next across a production run. [NEED_CITE: pallet sizing standards for curing and handling equipment]
Reading the Spec Sheet Like a Plant Engineer
Hydraulic pressure and vibration force are not independent numbers; they work as a pair. The 120 kN vibration force compacts aggregate into the mould cavity, while the hydraulic system applies a sustained hold pressure that prevents elastic rebound the instant vibration stops. If the hydraulic pressure is too low relative to the vibration energy, blocks spring back and lose height tolerance. The 62 kW total power draw signals the motor capacity available for both the vibration drive and the hydraulic pump; undersizing either one shows up as inconsistent block strength across the pallet. The 15–30 second moulding cycle range reflects the spread from a simple solid paver to a tall hollow block requiring a longer fill and vibration sequence, so the cycle time you plan your line around must be the one calculated for your primary product.
What Happens When the Mix Design Is Never Discussed
A machine configured for a clean, graded gravel mix will struggle the moment it receives unwashed river sand with elevated fines content. The feeding system, vibration duration and hydraulic hold pressure all need adjustment, and without a baseline mix test the commissioning engineer is guessing. Blocks come off the line with surface cracks or low corner density, and the buyer blames the press when the real issue is an untested material assumption. Every plant I have helped troubleshoot after the fact traced the output shortfall back to a mix that was never validated against the machine settings before shipment. [NEED_CITE: aggregate testing and mix design validation for block production]
What Sets This Procurement Path Apart
- Block machinery is the single product focus, so the QT12-15, its moulds, pallets and handling stations are specified as one matched system rather than sourced separately.
- Machine configuration starts from the buyer’s actual mix design, local aggregate report and target block format, not a default catalogue line.
- Mould design and supply covers every format the buyer’s market demands, including custom drawings for non-standard sizes.
- Automation level is selectable at order stage, allowing a plant to begin semi-automatic and add pallet feeding or stacking later.
- Installation support includes operator training on the specific block formats the line will run.
Documentation & Verification
- Line layout drawing showing the block format and cavity count assumed for each capacity figure
- Mould drawing package with format list and dimensional tolerances for every block type ordered
- Voltage, frequency and PLC display language confirmation record signed before production starts
- Factory test record measuring actual cycle time on the buyer’s specified block format
- Hydraulic and electrical schematic set with component identification for field service
- Packing photographs and customs documentation support for container loading
Installation, Commissioning & Support
- Foundation plan referencing the 1300 × 900 mm pallet footprint and vibration isolation requirements
- Dedicated power circuit sizing for the 62 kW total load with voltage and phase confirmed before shipping
- Partial dismantling state for container loading with reassembly sequence documented on site
- First-run parameter setting on the buyer’s target block format and local aggregate blend
- Operator training covering mould change procedure, daily greasing points and PLC fault reading
- Wear parts list with hydraulic seal kit and vibration isolator replacement intervals
Before You Send the Inquiry
Start with the exact block formats your market moves in highest volume, including dimensions, wall thickness and target compressive strength. Attach your most recent aggregate test report so the feeding system and vibration settings can be matched to the material you will actually run. Confirm your facility’s industrial voltage, frequency and the language your operators need on the PLC screen. If you already have curing racks, forklifts or pallet-handling conveyors on site, send their specifications so pallet compatibility is settled before the order is placed.
Frequently Asked Questions
Q: What block format is the QT12-15 cycle time of 15–30 seconds based on, and how does it differ between hollow block and paving brick?
A: The cycle range covers multiple formats. A thin paving brick with a flat profile can complete forming near 15 seconds, while a 200 mm hollow block with multiple cores requires extended vibration to fill deep cavities, pushing toward 30 seconds. The capacity calculation you receive should name the exact format, dimensions and cavity count behind every output number.
Q: How do I match vibration force and hydraulic pressure to my local aggregate for consistent block strength?
A: Share a sieve analysis and moisture reading of your intended aggregate before the machine is built. The vibration amplitude, hold pressure and cycle duration are then adjusted so that coarse, angular stone receives enough energy to interlock while finer, clay-bearing sand gets longer vibration without over-compaction that causes lamination.
Q: What is the mould change time, and can one operator handle it within a normal shift?
A: Mould change involves unbolting the mould box from the vibration table and lifting in the replacement. With the standard bolt pattern on the QT12-15, a single trained operator using the supplied alignment pins can complete the swap within a fraction of a shift, but exact timing depends on whether hydraulic clamp quick-release is specified.
Q: Is the 1300 × 900 mm pallet compatible with my existing curing racks and forklift?
A: Compatibility depends on your rack beam spacing and fork tine length. If your current racks were built for a smaller pallet, the 1300 × 900 mm board may overhang or sit unstable. Provide your rack and forklift dimensions during the inquiry so pallet size can be confirmed or an alternative selected before the line ships.
Q: What voltage, frequency and PLC language options are available, and when must they be confirmed?
A: The electrical system is configurable to common industrial supplies worldwide, but voltage, phase and frequency must be stated before production begins. The PLC display language is set during programming, also prior to build. Late changes mean re-wiring or re-flashing on site, which delays commissioning.
