Description
Configured to your mix — Every QT4-15A setup is validated against your local aggregate sample, target block format and daily output before the quotation is issued, so the capacity number you see matches what you produce on the floor.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15A |
| Product Type | Fully Automatic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 4100×1600×2600 mm |
| Rated Hydraulic Pressure | 16–21 MPa |
| Main Vibration Form | Platform Vibration |
| Vibration Frequency | 4200 r/min |
| Vibration Force | 55 kN |
| Pallet Size | 880×550 mm |
| Molding Cycle | 25–30 s (basis not stated in source — confirm block format and material) |
| Overall Power | 18.45 kW |
| Total Mass | 4 T |
| Demolding Method | Hydraulic |
| Factory Area Required | 300 m² |
| Control System | PLC |
| Automation Level | Fully Automatic |
| Warranty | 1 Year |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for load-bearing walls | Crushed stone, sand, cement, fly ash |
| Solid block manufacturing for partition walls | Gravel, sand, cement, slag |
| Interlocking brick forming for pavement and landscaping | Crushed stone, sand, cement with color pigment |
| Paving block and colored paver production | Fine aggregate, cement, oxide pigment |
| Kerbstone and curb production for roadworks | Coarse aggregate, cement, slag |
What "25–30 Seconds per Cycle" Leaves Out for QT4-15A Block Machine Specifications
A cycle time only means something when tied to the exact block format, wall thickness, and aggregate you will actually run.
I have watched buyers sign contracts based on a single cycle time figure, only to find that switching from a standard hollow block to a 60 mm interlocking paver added seconds to every press stroke because the vibration profile and hydraulic hold time were never recalculated for the denser mix. The QT4-15A block machine specifications list 25–30 seconds as the molding window, but that range shifts depending on whether you are pressing lightweight hollow blocks from fly ash or high-density pavers from crushed granite [NEED_CITE: block cycle time variation by format and aggregate density]. Stating the format assumption next to every capacity figure is the only way a buyer can plan real daily output.
Matching Vibration and Pressure to Your Aggregate Profile
The QT4-15A interlocking brick machine capacity by format depends heavily on how well the 55 kN platform vibration and 16–21 MPa hydraulic pressure align with your specific raw material. High-clay red soil, common across many African and Southeast Asian sites, absorbs vibration energy differently than clean river sand, often requiring a longer dwell time or adjusted frequency to achieve uniform compaction. When the vibration force is undersized for the aggregate, blocks emerge with soft edges and inconsistent density, leading to breakage during curing and handling.
Why Pallet Size Decisions Belong Before the Order
An 880×550 mm pallet may seem like a minor line item, but it dictates your curing rack dimensions, forklift tine spacing, and the footprint of your entire wet-side handling area. Buyers who select pallet size without checking their existing infrastructure often discover after delivery that their curing racks need rebuilding or that their forklift cannot pick two pallets in a single trip. Confirming pallet dimensions against your site layout before production starts avoids costly rework that delays commissioning by weeks [NEED_CITE: pallet handling compatibility in block plant layout].
Reading the Numbers That Actually Matter
The 4200 r/min vibration frequency on the QT4-15A is tuned for mid-range concrete mixes, providing sufficient energy transfer for standard hollow blocks and interlocking bricks without over-vibrating finer aggregates that could cause segregation. The 16–21 MPa hydraulic pressure range gives operators room to adjust clamping force when switching between thin paver moulds and taller hollow block moulds, preventing flash on thin formats while ensuring full compaction on deeper cavities. Platform vibration, rather than mould vibration alone, distributes energy evenly across the 880×550 mm pallet surface, reducing density variation from center to edge — a common defect source on machines that rely solely on mould-side exciters. The 18.45 kW total power draw means the machine can typically run on a standard industrial three-phase supply without requiring a dedicated transformer upgrade at most small-to-medium plants.
The Hidden Cost of Skipping the Material Sample
Sending a raw material sample before finalizing the QT4-15A configuration feels like an extra step, but skipping it is where capacity promises fall apart. A mix designed around river sand will behave entirely differently when the buyer sources crushed limestone locally, often resulting in blocks that crumble at the corners or fail compressive strength tests. I once saw a plant lose an entire first production week because the specified vibration frequency could not consolidate a high-fines aggregate, forcing a complete parameter recalibration on site [NEED_CITE: aggregate testing requirements for concrete block production]. The cost of a courier sample is nothing compared to the cost of re-engineering a production recipe after the machine is bolted to the floor.
Why Sourcing This Machine Here Makes Sense
Block machinery is the single focus of this operation, which means the QT4-15A press, mould, pallet and handling equipment are specified as one matched system rather than assembled from separate vendors. Every configuration is set against the buyer’s actual mix design and target block format, not pulled from a catalogue default. Mould design covers the formats your market sells — hollow, solid, interlocking, paver, kerbstone — and custom mould drawings are accepted when standard formats do not match your project specification. Automation level is selectable, so a buyer can begin with semi-automatic pallet handling and move to full stacking and cubing as production volume justifies the investment. Documentation includes a line layout with capacity calculations stated per block format, so you know exactly what output to expect from each product in your range.
Documentation & Verification
- Line layout and capacity calculation stating the block format assumed for each output figure
- Mould drawing and format list covering every product the QT4-15A can produce
- Pallet specification including size and material matched to your curing area
- Hydraulic and electrical schematic for on-site maintenance reference
- Factory test record run on your specified block format before dispatch
Installation, Commissioning & Support
- Foundation plan sized for the 4100×1600 mm footprint and 4 T operating mass
- Three-phase power supply confirmed for 18.45 kW total draw before machine arrival
- PLC display language set to operator preference before the control cabinet ships
- Vibration frequency and hydraulic pressure calibrated to your mix during on-site commissioning
- Mould change procedure and required tools covered during operator training sessions
- Wear parts list provided with recommended reorder intervals for hydraulic seals and vibration mounts
What to Include in Your Inquiry
Send your target block format with dimensions, the daily output you need per format, and a sample or lab report of your local aggregate. Include your site voltage and frequency, the PLC language your operators prefer, and the curing area dimensions you have available so the 880×550 mm pallet configuration can be validated against your existing racks and forklift.
Frequently Asked Questions
Q: How is cycle time and daily output calculated for each block format on the QT4-15A?
A: Cycle time is measured from pallet feed to block release and varies by format, wall thickness, and aggregate density. We calculate daily output per format using the confirmed molding cycle, pallet size, and operating hours, and provide a written capacity table that states the exact block dimensions assumed for each figure so you can plan production honestly.
Q: Which mould formats are available and can I order custom moulds?
A: Standard moulds cover hollow blocks, solid blocks, interlocking bricks, paving blocks, and kerbstones in common dimensions. If your market requires a non-standard format, we accept custom mould drawings and engineer the cavity layout, compaction profile, and demolding sequence to match your specification.
Q: How do I match vibration force and hydraulic pressure to my local aggregate?
A: Send a representative sample of your aggregate along with your cement type and target mix ratio. We run trial pressings at different vibration frequencies and hydraulic pressures within the 16–21 MPa range, then lock in the parameters that produce consistent density and compressive strength for your material.
Q: What pallet size and material should I choose for my curing area?
A: The QT4-15A uses an 880×550 mm pallet, and the material — typically bamboo, PVC, or steel — should be selected based on your curing method, local humidity, and forklift capacity. We confirm the choice against your curing rack spacing and handling equipment before production to avoid compatibility issues on site.
Q: How long does a mould change take and what tools are required?
A: A standard mould change on the QT4-15A involves releasing the hydraulic clamps, lifting the old mould, positioning the new one, and recalibrating the vibration and pressure settings. Basic hand tools and the supplied lifting bracket are all that is needed, and the procedure is covered during operator training so your team can handle format switches independently.
