Matched System Engineering — every station from raw material intake to stacking is configured around the press cycle so no segment waits on another.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15 |
| Product Type | Full Automatic Block Making Machine |
| Overall Dimension | 7100 × 1600 × 2610 mm |
| Host Machine Dimension | 2800 × 1800 × 2550 mm |
| Rated Pressure | 16 MPa |
| Main Vibration Form | Platform Vibration |
| Vibration Frequency | 4600 r/min |
| Vibration Force | 40 KN |
| Pallet Size | 950 × 550 × 20/25 mm |
| Molding Cycle | 15–25 s |
| Overall Power | 27.5 kW |
| Host Machine Power | 19.2 kW |
| General Water Consumption | 4 T/day |
| Total Mass | 5 T |
| Motor Brand | Siemens or ABB (source value — verify against manufacturer catalog) |
| Control System | Original Siemens PLC with independently developed machine control program |
| Hydraulic System | Double proportional hydraulic valve, Calyca or Youken brand (source value — verify against manufacturer catalog) |
| Capacity (Hollow Brick 390×190×190 mm) | 720–960 pcs/h (based on 4 pcs/mold, 15–20 s cycle) |
| Capacity (Porous Brick 240×115×90 mm) | 2520–3360 pcs/h (based on 14 pcs/mold, 15–20 s cycle) |
| Capacity (Standard Brick 240×115×53 mm) | 5930–6720 pcs/h (based on 28 pcs/mold, 15–17 s cycle) |
| Warranty | 1 year for whole machine (excluding spare parts) |
| Standards | CE (basis not stated in source — confirm certification status) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for load-bearing walls | Concrete mix with crushed stone, sand, and cement |
| Porous brick firing or non-firing lines | Lightweight aggregate, fly ash, and cement blends |
| Standard solid brick manufacturing | Dense aggregate and cement-based mixes |
| Paving brick and interlocking brick production | High-strength concrete with fine and coarse aggregate |
| Road brick and kerbstone forming | Heavy-duty concrete mixes with graded stone |
Why "Pieces per Hour" Tells Only Half the Story for a Block Making Machine Production Line
A press that cycles fast means nothing when the mixer cannot feed it or the stacker cannot clear the pallets.
Most quotations for a block making machine production line quote the press in isolation. The cycle time on the spec sheet assumes the hopper is full, the pallet is in position, and the finished block has already been removed. In a real turnkey block plant, those three events are separate stations with their own timing. When the mixer batch is thirty seconds late or the pallet return conveyor jams, the press sits idle and the quoted output collapses. I have seen lines where the press was rated for a certain hourly figure yet the daily tally barely reached half because the upstream and downstream stations were never synchronized. [NEED_CITE: cycle synchronization across block line stations]
How the QT4-15 Sits Inside a Connected Block Making Machine Production Line
The QT4-15 is the center of a full block making machine production line, not a standalone press. Raw material feeding, batching, mixing, pallet circulation, pressing, stacking, and curing rack handling are each specified so that their individual cycle times converge at the press. The Siemens PLC coordinates the sequence — it will not fire a new cycle until the pallet is confirmed in position and the upstream mixer signals a full batch.
Matching Stations So the Press Never Waits on a Turnkey Block Plant
Each station around the QT4-15 must be sized for the peak demand of the press. A 25-second molding cycle on hollow blocks means the mixer must deliver a fresh batch every cycle, the pallet feeder must index a new pallet within that window, and the stacker must clear the finished pallet before the next press stroke. If any station is undersized, the entire turnkey block plant slows to the pace of its weakest link. [NEED_CITE: bottleneck analysis in block production lines]
Reading the Specs That Actually Govern Daily Output
The 16 MPa rated pressure combined with 40 KN vibration force at 4600 r/min determines how densely the concrete is compacted in the mold. Higher compaction means blocks can be demolded sooner without corner damage, which directly shortens the molding cycle. The 950 × 550 mm pallet size must align with the curing rack spacing and the forklift already on site — a mismatch here forces manual restacking and adds handling time that no press spec sheet will ever show. The double proportional hydraulic valve system gives smooth acceleration and deceleration of the press head, reducing shock loads on the mold and extending mold service life across thousands of cycles per shift.
The Hidden Cost of Specifying the Press Alone
When a buyer purchases the QT4-15 without specifying the pallet return conveyor, the stacking station, or the curing rack system, those gaps fall on the buyer to fill after arrival. Pallets pile up at the press exit and workers carry blocks by hand to the curing area — daily output drops and labor costs climb. Voltage and frequency left unconfirmed until the container arrives can delay commissioning by weeks while transformers or motor rewinds are sourced locally. A mold specified for a mix the buyer cannot obtain locally means paying for material substitution or ordering a new mold set after the machine is already on the floor. [NEED_CITE: commissioning delays caused by unconfirmed utility specifications]
What Sets This Line Configuration Apart
Block machinery is the single focus here, so the QT4-15 and every supporting station are specified as one matched system rather than assembled from separate vendors. The line layout is built around the buyer’s actual mix design and local aggregate, not a catalogue default. Pallet size, curing rack spacing, and forklift type are confirmed together so that nothing arrives incompatible. Automation level is selectable — a buyer can start with semi-automatic pallet handling and add automatic stacking and cubing later without replacing the press. Mould design covers the formats the buyer’s market actually sells, including custom drawings when standard molds do not fit the required dimensions.
Documentation & Verification
- Line layout drawing showing each station and its cycle time relative to the QT4-15 press
- Capacity calculation sheet stating the block format assumed for every hourly output figure
- Hydraulic and electrical schematic with station-to-station connection points marked
- Voltage, frequency, and PLC display language confirmation form signed before production
- Factory test record on the buyer’s specified block format and pallet size before dispatch
Installation, Commissioning & Support
- Foundation plan sized to the 7100 × 1600 mm overall footprint and 5 T total mass
- Power supply matched to the 27.5 kW overall load with dedicated circuit for the 19.2 kW host motor
- Machine dismantled into host and auxiliary stations for container loading, reassembled on site
- Siemens PLC parameters set to the buyer’s block format and molding cycle during first commissioning
- Operator training covers mold change procedure, pallet loading, and daily vibration force checks
- Wear parts list with recommended reorder intervals for hydraulic seals and mold liners
What to Share When Requesting a Line Quote
Provide the block formats your market sells, the target daily output per format, and your local aggregate type with a sieve analysis if available. Confirm the voltage and frequency at your site, the PLC display language your operators need, and the dimensions of any existing curing area or forklift. State whether you need the full line from raw material feeding through stacking, or only specific stations around the press.
Frequently Asked Questions
Q: How must upstream feeding and mixing stations be timed so the QT4-15 press is not left idle?
A: The mixer must complete and discharge a batch within the press molding cycle, which ranges from 15 to 25 seconds depending on block format. The raw material feeder and weigh batcher are sized so that the mixer is never empty when the press signals demand. If the mixer batch time exceeds the press cycle, a larger mixer or a buffer hopper between the mixer and press hopper is specified.
Q: What pallet material and thickness are recommended for the full line, and how do they affect curing rack capacity?
A: The QT4-15 uses 950 × 550 mm pallets at 20 or 25 mm thickness. Bamboo, PVC, or steel pallets each carry different weights and stiffness levels, which determine how many loaded pallets a curing rack tier can hold. Heavier pallets reduce rack capacity per tier, so the total number of curing rack tiers must be calculated against pallet weight and the daily output volume.
Q: Can the line start semi-automatic and upgrade to automatic stacking and cubing later?
A: Yes. The QT4-15 control system allows the stacking and cubing stations to be added as separate modules. The Siemens PLC program is updated to include the new stations, and the pallet conveyor is extended to reach the stacker. The press itself does not need modification — only the downstream conveyor length and the PLC sequence are changed.
Q: How is daily output calculated per block format when curing and stacking are included?
A: Daily output starts from the press capacity per format — for example, 720 to 960 hollow bricks per hour based on four pieces per mold at a 15 to 20 second cycle. That figure is then multiplied by the number of production hours, minus time lost to mold changes and maintenance stops. Curing rack capacity and stacking speed are verified to handle the full daily volume without creating a backlog at the press exit.
Q: What utility requirements does the full line demand beyond the press alone?
A: Beyond the 27.5 kW electrical load and 4 T/day water consumption of the press, the full line adds power for the mixer motor, pallet return conveyor, stacker, and any curing rack transfer system. Compressed air may be needed for pneumatic valves in the batching station. Total connected load and water demand are calculated once every station is confirmed and stated in the line layout document.
