Description
Format-Matched Capacity — the QT4-18 block making machine is specified against the exact mould format and local mix design your market demands, not a single catalogue figure.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-18 |
| Product Type | Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 3900×1600×2300 mm |
| Total Weight | 3T |
| Rated Power | 24KW |
| Vibration Force (Exciting Power) | 40-50KN |
| Molding Cycle | 15-25s |
| Mixer Model | JQ350 |
| Pallet Size | 850×550×25 mm |
| Applied Products | Paver, solid brick, hollow block, curbstone |
| Raw Materials | Crushed stones, sand, cement, dust, fly ash |
| Automation Level | Semi-automatic |
| Hydraulic Station | Equipped |
| Output Capacity (Hollow 400×200×200mm) | 1200-1680 Pcs/Hr (9600-13440 Pcs/8hr) |
| Output Capacity (Hollow 400×150×200mm) | 1800-2400 Pcs/Hr (14400-19200 Pcs/8hr) |
| Output Capacity (Solid 240×115×53mm) | 3240 Pcs/Hr (16200-19440 Pcs/8hr) |
| CE Certification | Available (source value — verify against manufacturer catalog) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production | Crushed stone, sand, cement, fly ash — 400×200×200mm or 400×150×200mm formats |
| Solid brick manufacturing | Local aggregate with cement binder — 240×115×53mm standard format |
| Paving stone production | High-density mix with fine aggregate for surface finish |
| Curbstone and kerbstone | Coarse aggregate mix with extended vibration cycle |
| On-site contractor block making | Semi-automatic operation suitable for project-based production |
What QT4-18 Block Machine Specifications Reveal About Real Output
Cycle time only means something when tied to a specific block format and mould.
I have watched buyers sign purchase orders based on a headline number — cycles per hour — and then arrive at commissioning to find the machine spends the first half of every shift waiting on pallets or struggling through a mix it was never set up for. The QT4-18 block making machine lists different capacities for hollow, solid, and paver formats precisely because each format demands a different vibration duration, hydraulic dwell, and material feed. [NEED_CITE: block format impact on cycle time in semi-automatic presses]. When a supplier quotes a single figure without naming the block size assumed, the number is marketing, not engineering.
Matching the Mould to Your Market Format
The QT4-18 accepts moulds for hollow blocks, solid bricks, pavers, and curbstones, but each format change carries a real cycle-time cost. A hollow block mould at 400×200×200mm draws a longer vibration cycle than a solid brick at 240×115×53mm because the void geometry requires the mix to consolidate around a core. When we size the QT4-18 block making machine for a buyer, the capacity calculation names the format, the pieces per mould, and the seconds per cycle — so the daily output figure matches what actually leaves the press.
Why Local Aggregate Dictates the Setup
Crushed stone from one quarry behaves differently from river sand two provinces away. The vibration force range of 40-50KN on this press gives the operator room to tune consolidation, but only if the hydraulic pressure is matched to the same mix. I once saw a machine set for clean washed sand arrive at a site running high-clay local material; the blocks came out soft because the vibration energy dissipated in the clay rather than compacting the aggregate. [NEED_CITE: aggregate clay content effect on block compressive strength]. The mix design conversation has to happen before the machine ships.
Reading the Specs That Matter on the Shop Floor
The 3900×1600×2300 mm footprint of the QT4-18 defines how much curing space you need downstream — every pallet that exits the press must be racked or floor-cured before the next cycle. The 850×550×25 mm pallet size is not arbitrary; it determines forklift compatibility and curing rack spacing. The 24KW rated power tells you the electrical supply requirement, but the real question is whether your site voltage and frequency match the motor winding specification before the container leaves the factory. The JQ350 mixer must keep pace with the 15-25s molding cycle, or the press stands idle waiting for material — a bottleneck that has nothing to do with the press itself.
The Cost of Skipping Pallet and Format Confirmation
When a pallet specification is chosen without checking the buyer’s existing curing racks and forklift, the result is pallets that do not stack, racks that do not fit, or a forklift that cannot reach the top row. We have seen buyers receive machines where the pallet thickness did not match their curing kiln rails, forcing a full pallet reorder before the first production week ended. [NEED_CITE: pallet dimension mismatch in block plant commissioning delays]. The pallet size on the QT4-18 must be confirmed against the buyer’s curing area layout, not selected from a default list.
Why Buyers Choose This Configuration
Block machinery is the sole product focus here, which means the press, mould, pallet, and handling equipment are specified as a matched system rather than assembled from unrelated suppliers. The QT4-18 configuration is built around the buyer’s actual block format, local raw material, and site conditions — not a catalogue default. Mould drawings are provided for every format the buyer’s market sells, including custom profiles. The semi-automatic architecture allows a buyer to start with manual pallet handling and add automatic stacking later as volume grows. Installation support covers operator training on the specific mix and mould combination running at the buyer’s plant.
Documentation & Verification
- Line layout showing pallet flow from the 850×550mm press table through to curing rack positions
- Capacity calculation sheet stating block format, pieces per mould, and cycle seconds assumed
- Mould drawing and format list for every block type included in the order
- Voltage, frequency, and control panel language confirmation signed off before shipment
- Factory test record produced with the buyer’s specified raw material blend
Installation, Commissioning & Support
- Foundation pad leveled to within tolerance across the 3900×1600mm machine footprint before delivery
- Dedicated 24KW electrical circuit with confirmed voltage and frequency matching the motor nameplate
- Mixer JQ350 positioned so material feed aligns with the 15-25s press cycle without dead time
- First-run commissioning with the buyer’s local aggregate to set vibration force within the 40-50KN range
- Operator training on mould change procedure and cycle adjustment for each block format ordered
- Wear parts and hydraulic seal list provided for first scheduled maintenance interval
Before You Request a Quote
To size the QT4-18 correctly, share the block formats your market actually buys, the daily volume you need per format, and a sample or description of your local aggregate. Let us know your site voltage and frequency, the language you need on the control panel, and whether you already have curing racks or forklifts on site that the pallet size must match.
Frequently Asked Questions
Q: How is QT4-18 capacity calculated for different block formats?
A: Each capacity figure is tied to a specific mould. For example, 400×200×200mm hollow blocks produce 1200-1680 pieces per hour based on the mould cavity count and a 15-25s cycle. Solid bricks at 240×115×53mm yield a different number because the mould holds more pieces per cycle. We provide a written capacity sheet naming the format assumed.
Q: Which mould formats are available and what is the cycle time per format?
A: Moulds cover hollow blocks, solid bricks, pavers, and curbstones. Cycle time ranges from 15 to 25 seconds depending on the format and the consolidation required by the mix design. We confirm the cycle per format during configuration so your daily output estimate is based on the block you will actually produce.
Q: How is vibration force and hydraulic pressure matched to my local mix design?
A: The QT4-18 delivers 40-50KN of vibration force. During commissioning, we adjust the vibration duration and hydraulic pressure together to suit the buyer’s aggregate, cement ratio, and target block density. A high-clay mix needs different settings than clean washed sand to achieve consistent strength.
Q: What pallet size does the QT4-18 use and how does it affect my curing layout?
A: The standard pallet is 850×550×25 mm. This dimension determines your curing rack spacing, forklift tine width, and kiln rail clearance. We confirm pallet size against your existing handling equipment before production so there are no compatibility issues at commissioning.
Q: What is the realistic mould change time on the QT4-18?
A: On a semi-automatic press like the QT4-18, mould change involves removing the current mould, aligning the new one, and recalibrating vibration and feed settings for the new format. Actual change time depends on operator familiarity and whether the plant has a dedicated mould cart. We train operators during commissioning to minimize this downtime.
