Matched System Integration — Every QT4-15 line we ship includes the pallet feeder, stacker, and curing rack handler spec’d to the same cycle time, so the press never sits idle waiting for peripherals to catch up.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15 |
| Product Type | Hydraulic Block and Paver Making Machine |
| Control System | PLC controlled |
| Molding Cycle | 15-30s |
| Pallet Size | 900x500mm |
| Vibration Type | Platform vibration |
| Vibration Frequency | 50-70Hz |
| Product Height Range | 50-220mm |
| Overall Power | 24.5kW |
| Demolding Method | Hydraulic |
| Output Capacity (Hollow Block 400x200x200mm) | 900-1,200 pcs/hour (7,200-9,600 pcs/8hr) |
| Output Capacity (Hollow Block 400x150x200mm) | 1,080-1,440 pcs/hour (8,640-11,520 pcs/8hr) |
| Output Capacity (Hollow Block 400x100x200mm) | 1,440-1,920 pcs/hour (11,520-15,360 pcs/8hr) |
| Output Capacity (Paver 200x100x60mm) | 2,880-3,840 pcs/hour (23,040-30,720 pcs/8hr) |
| Output Capacity (Solid Brick 240x115x53mm) | 5,930-6,720 pcs/hour (47,400-53,700 pcs/8hr) |
| Raw Materials | Fly ash, slag, gangue, sand, crushed stone, cement, water |
| Block Compressive Strength | More than 15 MPa |
| Electrical & Hydraulic Components | Original imported or Chinese famous brand |
| Assembly State | Fully assembled with automatic pallet feeding, material feeding, vibrating, and demolding |
| Standards | CE (declared where applicable) |
Application Suitability
| Application | Material or Output |
|---|---|
| Medium-scale hollow block plants | 400mm series hollow blocks from fly ash, sand, and cement |
| Paver and interlocking brick production | 200x100x60mm pavers from crushed stone and cement |
| Solid brick manufacturing for housing projects | 240x115x53mm solid bricks from slag, gangue, or sand |
| On-site production for development contractors | Multiple block formats using locally available aggregate |
| Building material distributors adding formats | Format changeovers on a single pallet size and press |
What "900 Blocks per Hour" Doesn’t Tell You About Your Line
A press that cycles faster than your mixer can discharge is a press that spends half the day waiting.
I have watched plant owners stare at a QT4-15 sitting idle because the upstream batch mixer took forty seconds to discharge while the press cycle was already finished in twenty. The catalogue says 900 to 1,200 hollow blocks per hour based on a 400x200x200mm format, but that number assumes material arrives at the hopper exactly when the mould is ready. When the block production line equipment is sourced as a press-only quotation, the buyer is left to guess whether the feeder, mixer, and pallet return conveyor can actually keep pace [NEED_CITE: coordination of cycle times across block line stations]. The turnkey block making system approach specifies every station against the same cycle target so the press runs continuously instead of in bursts.
Synchronizing the Mixer Discharge with the Press Cycle
The QT4-15 molding cycle runs between 15 and 30 seconds depending on block format and vibration setting. A turnkey block making system must ensure the raw material feeding station delivers a fresh charge within that same window. When the mixer is undersized or the belt conveyor runs too slow, the press completes its vibration and hydraulic demolding sequence and then waits. Over an eight-hour shift, those idle gaps accumulate into thousands of missing blocks. Specifying the block production line equipment as one package means the feeder capacity, mixer batch volume, and conveyor speed are all calculated against the press cycle before anything is built.
Pallet Return Speed and Curing Rack Coordination
After demolding, the wet block sits on a 900x500mm pallet that must travel to the curing area and an empty pallet must return to the press before the next cycle starts. If the pallet return conveyor is too slow, or if the stacking station cannot clear pallets fast enough, the press again sits idle. The pallet size was chosen to fit standard curing rack dimensions and common forklift capacities, but only when the pallet handling stations are included in the block production line equipment scope does the whole sequence run without bottlenecks [NEED_CITE: pallet handling logistics in block plant layout].
How PLC Control Ties Every Station Together
The PLC-controlled system on the QT4-15 coordinates material feeding, vibration, hydraulic demolding, and pallet indexing as one continuous sequence. When supporting stations are wired into the same control logic, the PLC can pause the press if the mixer is still discharging or if the stacker is not yet in position, preventing jams and wasted material. This is the difference between a press that runs by itself and a turnkey block making system where every peripheral responds to the same program logic.
Reading the Specifications for What They Mean On-Site
Vibration frequency of 50-70Hz combined with hydraulic demolding determines the compaction density of every block that leaves the mould. Higher frequency with matched hydraulic pressure produces consistent wall thickness and compressive strength above 15 MPa across formats from hollow blocks to pavers. The overall power of 24.5kW covers the vibration motors, hydraulic pump, and feeder drives running together. Product height range of 50-220mm means the same press handles 60mm pavers and 200mm hollow blocks simply by changing the mould and adjusting the PLC parameters. The key is that raw material feed configuration and pallet handling must be specified to support the full height range, not just the format shown in the brochure.
The Cost of Sourcing the Press Alone
When a buyer purchases the QT4-15 press without the pallet feeder, stacker, and curing rack handler, the missing stations are often added later from different suppliers. The result is a patchwork line where the pallet conveyor runs at a different speed than the press expects, or the stacker cannot handle the pallet dimensions the press was set up for. I have seen situations where the buyer spent weeks re-wiring PLC signals between mismatched controllers just to get the pallet return working [NEED_CITE: integration challenges when block line components are sourced separately]. Those delays and re-engineering costs never appear in the original press-only quotation.
Why Buyers Source the Complete Line Here
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 catalogues. Every configuration is set against the buyer’s actual mix design, local aggregate, and target block format, not a default setting. Mould design covers the formats the buyer’s market actually sells, including custom drawings when a standard mould does not fit. The automation level is selectable, so a plant can start with semi-automatic pallet handling and upgrade the stacker later without replacing the press. Installation support includes operator training so the crew understands how every station connects, not just how to press the start button.
Documentation & Verification
- Line layout and capacity calculation stating the block format assumed for each QT4-15 output figure
- Machine specification sheet with 900x500mm pallet size and 24.5kW overall power confirmed
- Mould drawing and format list covering hollow block, paver, and solid brick dimensions
- Voltage, frequency, and PLC display language confirmation document signed before production
- Factory test record showing cycle time and block strength with buyer’s target mix design
- Hydraulic and electrical schematic for the complete line including all peripheral stations
Installation, Commissioning & Support
- Foundation plan sized to the QT4-15 footprint and 24.5kW total power draw with dedicated circuit requirements
- Machine arrives fully assembled with automatic pallet feeding and material feeding pre-wired to the PLC
- On-site commissioning includes verifying 50-70Hz vibration frequency against the buyer’s specific aggregate mix
- Operator training covers PLC parameter adjustment for all block formats within the 50-220mm height range
- Wear parts list covers hydraulic seals, vibration springs, and mould liners with reorder part numbers
- Preventive maintenance schedule aligned to the hydraulic demolding system and platform vibration components
What We Need to Quote Your Line Accurately
Tell us which block format your market buys most, the daily output you need for that specific format, and what raw materials you can source locally. Share your site voltage and frequency, the PLC display language your operators read, and the dimensions of your existing curing area and forklift capacity. If you have upstream crushers or mixers already on site, send their model and throughput so we can match the QT4-15 block production line equipment to what you already have.
Frequently Asked Questions
Q: How do I verify the capacity figures are based on my specific block format and local aggregate?
A: Every quotation includes a capacity calculation table that states the exact block format assumed for each output figure, such as 900-1,200 pieces per hour based on 400x200x200mm hollow blocks. We run a factory test with your target mix design and local aggregate sample before shipment to confirm the cycle time and compressive strength match the quoted numbers.
Q: What supporting equipment is included versus quoted separately?
A: The turnkey block making system quotation covers the QT4-15 press, automatic pallet feeding, material feeding, vibration station, hydraulic demolding, stacking station, and curing rack handling as one package. Each station is listed individually on the quotation so you can see exactly what is included and choose to remove or upgrade any peripheral before production begins.
Q: How do I confirm voltage, frequency, and control language match my site before shipment?
A: We require a signed voltage and control confirmation document before the QT4-15 enters production. This document locks in your site voltage, frequency, and the PLC display language. The electrical schematic delivered with the machine matches these confirmed values, and the PLC program is loaded with the correct language before the factory test.
Q: How does the pallet size selection affect my existing curing racks and forklift operations?
A: The 900x500mm pallet size is matched to your curing rack dimensions and forklift capacity during the line layout stage. If your existing racks use a different pallet size, we adjust the specification before production so the pallets, racks, and forklift all work together without requiring new handling equipment on your site.
