Description
Mould & Capacity Match — every QT4-18 output figure is calculated against a specific block format and pallet size, not a generic cycle count.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-18 |
| Product Type | Hydraulic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 3900 × 1600 × 2300 mm |
| Molding Cycle | 15–25 s |
| Exciting Force (Vibration) | 40–50 kN |
| Rated Power | 24 kW |
| Mixer Model | JQ350 |
| Pallet Size | 850 × 550 × 25 mm |
| Total Weight | 3 T |
| Applied Products | Paver, solid block, hollow block, curbstone |
| Raw Materials | Crushed stone, sand, cement, dust, fly ash |
| Output Capacity (Hollow Block 400×200×200 mm) | 1,200–1,680 pcs/h; 9,600–13,440 pcs/8h (basis: stated block size) |
| Output Capacity (Hollow Block 400×150×200 mm) | 1,800–2,400 pcs/h; 14,400–19,200 pcs/8h (basis: stated block size) |
| Output Capacity (Solid Brick 240×115×53 mm) | 3,240 pcs/h; 16,200–19,440 pcs/8h (basis: stated block size) |
| Automation Level | Semi-automatic |
| Hydraulic Station | Equipped (high-pressure hydraulic system) |
| Vibration System | Bed mould vertical vibration + upper mould compression vibration |
| Voltage & Frequency | (basis not stated in source — confirm block format / material / thickness) |
| Control System | (basis not stated in source — confirm PLC brand / language) |
| Certification | (basis not stated in source — verify against manufacturer catalog) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for load-bearing walls | Crushed stone, sand, and cement mixes targeting standard 400×200×200 mm or 400×150×200 mm formats |
| Solid brick manufacturing for masonry | Fine sand and fly ash blends for 240×115×53 mm solid bricks |
| Paver production for driveways and walkways | High-strength aggregate and cement ratios for interlocking and rectangular pavers |
| Curbstone fabrication for road edges | Dense aggregate mixes with higher cement content for curb profiles |
Why "Cycles per Hour" Fails the Technical Buyer
Real capacity only exists when tied to a named block format and a confirmed mould.
I have stood on sites in West Africa where a machine rated for a certain hourly cycle count produced half the expected daily volume because the quotation never specified which block size that number assumed. Buyers pay for a hollow block plant and receive a paver cycle time. When the QT4-18 hydraulic block making machine specifications are reviewed, each output tier in the table above carries its own dimensional premise. A 15–25 second cycle means something different for a 400×200×200 mm hollow block than it does for a 240×115×53 mm solid brick, and that distinction determines whether a project deadline is met or missed [NEED_CITE: typical block plant output verification methods].
Capacity Honesty Starts with the Format Table
Most catalogues list a single impressive number and leave the format assumption buried in a footnote. The QT4-18 documentation separates output by block size: hollow blocks at two standard depths and solid bricks at a completely different throughput. This matters because a buyer targeting the local hollow block market needs to plan curing rack space and forklift schedules around the 9,600–13,440 piece range per eight-hour shift, not a theoretical maximum that applies only to solid bricks. Every QT4-18 hydraulic block making machine specifications sheet should arrive with this format-by-format breakdown before a purchase order is signed.
The Mould Change Question Nobody Asks Early Enough
A machine that handles pavers, hollow blocks, and curbstones on one platform is only flexible if the mould swap does not consume half a shift. The QT4-18 platform accepts multiple mould formats, but the time required to detach one mould, align the next, recalibrate vibration, and run test pieces must be confirmed against the actual production schedule. If a plant intends to run hollow blocks in the morning and pavers after lunch, the mould change procedure and required tooling should be documented and rehearsed before the first production day [NEED_CITE: mould change best practices in block production].
Vibration Force, Hydraulic Pressure, and What They Actually Do
The QT4-18 delivers 40–50 kN of exciting force through a dual vibration system: bed mould vertical vibration combined with upper mould compression vibration. This dual action is not a marketing phrase — it determines whether a hollow block exits the mould with uniform wall density or with weak corners that crumble during curing. The high-pressure hydraulic station supplies the compression that holds the mix in place while vibration compacts it. If the hydraulic pressure and vibration force are mismatched to the buyer’s specific aggregate gradation, blocks will either be over-compacted and brittle or under-compacted and fragile. The 24 kW rated power must be matched to the local voltage and frequency so the motor does not overheat under sustained load in a hot climate.
The Hidden Cost of Ignoring Pallet and Cure Area Fit
A pallet size of 850 × 550 × 25 mm is not arbitrary. It must match the curing rack slots, the forklift tine spacing, and the stacking method already present on the buyer’s site. When a machine arrives with pallets that do not fit the existing curing racks, the buyer either builds new racks at additional cost or handles blocks manually until replacements arrive. This delay is entirely preventable if pallet dimensions are confirmed against the buyer’s facility drawings before production begins [NEED_CITE: pallet sizing and curing logistics in block plants].
Why Procurement Starts with the Format, Not the Price
The QT4-18 is configured against the buyer’s target block format, local aggregate properties, and required block strength rather than a default catalogue setting. Mould design and supply cover the specific formats the buyer’s market actually sells, with custom drawings available for non-standard profiles. The semi-automatic automation level allows a buyer to begin production without the full investment of a stacking and cubing system, then add automation stations later as volume grows. Capacity calculations are delivered per block format, so daily output planning is grounded in the product the buyer intends to sell. Every specification — from pallet size to vibration tuning — is set against confirmed site conditions, not generic assumptions.
Documentation & Verification
- Line layout and capacity calculation stating the exact block format assumed for each output tier
- Mould drawing and format list confirming included and optional block sizes
- Pallet specification covering material, dimensions, and quantity matched to buyer’s curing setup
- Voltage, frequency, and PLC display language confirmation recorded before production
- Factory test record using the buyer’s specified mix design and target block format
- Packing photographs and customs documentation support for shipment
Installation, Commissioning & Support
- Foundation must accommodate 3900 × 1600 mm footprint with level tolerance for vibration stability
- Dedicated power circuit sized for 24 kW rated load plus mixer and auxiliary equipment
- Machine shipped as main unit with detachable components for standard container loading
- On-site commissioning includes vibration and hydraulic parameter tuning to buyer’s aggregate
- Operator training covers mould change procedure, daily maintenance, and safety interlocks
- Wear parts list and hydraulic seal kit supplied with initial spare quantities
- Regular maintenance schedule aligned to vibration motor and hydraulic station service intervals
What to Prepare Before Requesting a Quotation
Provide the exact block formats you intend to produce, including dimensions and required compressive strength. Confirm the raw materials available locally — sand type, aggregate gradation, cement grade, and any supplementary materials like fly ash. Specify the local voltage and frequency supply, the control language required for the operator interface, and the dimensions of your existing curing area and material handling equipment.
Frequently Asked Questions
Q: How is the output capacity of the QT4-18 calculated for each block format?
A: Each output figure is tied to a specific block dimension. Hollow blocks at 400×200×200 mm yield 1,200–1,680 pieces per hour, while the same machine produces 3,240 solid bricks per hour at 240×115×53 mm. The moulding cycle of 15–25 seconds applies across formats, but the pieces-per-pallet count and pallet cycle rate differ by block size.
Q: What mould formats are available, and how long does a mould change take?
A: The platform accepts moulds for hollow blocks, solid bricks, pavers, and curbstones. Mould change time depends on the specific profiles involved and the tools available on site. A formal procedure document and recommended tooling list are provided so changeovers can be planned into the production schedule.
Q: How should I choose pallet material based on my curing area and forklift?
A: Pallet size is fixed at 850 × 550 × 25 mm, but the material — typically hardwood, bamboo, or composite — must withstand the local curing environment and match forklift tine spacing. The pallet specification document confirms material grade and quantity against your curing rack design and handling equipment.
Q: Can the machine be adapted to my local aggregate and mix design?
A: The vibration force and hydraulic pressure are tuned to the buyer’s confirmed mix design and aggregate properties. A sample mix or detailed material data sheet allows the configuration to be set before the machine leaves the factory, ensuring consistent block density and strength from the first production run.
Q: What electrical and control details are confirmed before shipment?
A: Voltage, frequency, and PLC display language are confirmed in writing before production begins. This prevents commissioning delays caused by incorrect motor wiring or an operator interface in an unfamiliar language when the machine arrives on site.
