Complete Line Timing — every station from raw material feeding through pallet-free stacking is calculated as one sequence so the QT18-25 press never sits idle between cycles.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT18-25 |
| Product Type | Fully Automatic Hydraulic Pallet-free Hollow Block Production Line |
| Brick Height Range | 50–300 mm |
| Maximum Stacking Height | 1200 mm |
| Main Vibration Form | Platform Vibration |
| Vibration Frequency | 2800–4500 r/min |
| Vibration Power | 60 kW |
| Hydraulic System Power | 59 kW |
| Pallet Size | 1350 × 1350 × 120 mm (pallet-free operation — confirm curing interface) |
| Molding Cycle | 15–25 s (basis not stated in source) |
| Demolding Method | Vibration and Hydraulic |
| Diving Method | Hydraulic |
| General Water Consumption | 8 T/Day |
| Factory Area Required | 2000 m² |
| Control System | PLC with person-machine conversation interface |
| Automation Level | Fully automatic with direct stacking after moulding |
| Output Capacity | To be confirmed per block format |
| Applied Products | Concrete blocks, hollow/solid blocks, pavers, interlocking blocks, curbstone, colored pavers |
| Raw Materials | Crushed stone, sand, cement, fly ash, gravel, slag, dust |
| Warranty | 1st year spare parts (except quick-wear parts) and repair support |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production plants | Crushed stone, sand, cement, fly ash blends |
| Solid block manufacturing for housing projects | Gravel, slag, cement mixes |
| Paving block and colored paver production | Fine aggregate with pigment additives |
| Interlocking brick and curbstone forming | Coarse aggregate and cementitious binders |
| On-site production for development contractors | Locally sourced sand, stone dust, and cement |
What the 15–25 Second Cycle Time Actually Means
The molding cycle is only one link in the chain — daily output depends on which block format that figure assumes.
I have seen buyers receive a quoted cycle time and calculate their daily production, only to find the real throughput falls well short once the full sequence is running. The 15–25 s figure for the QT18-25 pallet-free block production line does not state which block size, wall thickness, or material mix it was measured on. A hollow block with thin walls and a dry mix may reach the lower end of that range, while a dense curbstone with a wetter aggregate blend will push toward the upper limit or beyond. Without a capacity calculation that names the exact format, no buyer can verify whether a turnkey automatic hollow block machine line will meet the daily volume their project demands [NEED_CITE: block cycle time variation by format and mix design].
Line Sequencing from Mixer to Stack
A pallet-free block production line only delivers its rated output when every upstream and downstream station is timed to the press. The QT18-25 is configured so that raw material feeding, mixing, and block delivery each complete within the molding window. If the mixer takes longer than the press cycle to deliver the next batch, the press waits. If the stacking station cannot clear the finished layer before the next cycle begins, blocks pile up and the press stops. Each station in this line is specified with a duty cycle that aligns with the QT18-25 press parameters, keeping the sequence continuous.
Pallet-free Stacking and Curing Area Planning
Eliminating pallets removes a significant capital outlay and changes how the curing area is organized. The QT18-25 uses combined vibration and hydraulic demolding to release blocks directly, and the stacking system builds columns up to 1200 mm. This means the curing yard needs a flat, load-bearing surface rather than pallet r infrastructure. However, the spec sheet lists a pallet size of 1350 × 1350 mm alongside the pallet-free description — this contradiction must be resolved before the line is built, because it affects forklift selection, curing area layout, and whether any transfer pallets are needed at all [NEED_CITE: pallet-free versus pallet-based curing infrastructure requirements].
Vibration and Hydraulic Pressure as a Matched System
Block density and strength come from the relationship between vibration force and hydraulic pressure, not from either parameter alone. The QT18-25 pairs 60 kW of vibration power at 2800–4500 r/min with a 59 kW hydraulic system. Platform vibration compacts the aggregate from below while hydraulic pressure locks the mould and applies top force during forming. If the buyer’s local aggregate is coarser or has a different moisture profile than the mix the machine was tested on, the balance between vibration frequency and hydraulic pressure must be adjusted. A mismatch here produces blocks with inconsistent compressive strength across a single batch.
The Hidden Cost of Unspecified Stations
When a quotation lists only the press and omits the stations around it, the buyer discovers the gaps after installation. Missing pallet handling, stacking, or curing rack systems mean blocks must be moved by hand, labor costs climb, and the press sits idle while workers catch up. I have seen this exact situation force a plant owner to halt production and source additional equipment at short notice, paying a premium and losing weeks of output. A fully specified turnkey automatic hollow block machine line includes every station from raw material intake to final stacking, with each one named in the contract scope [NEED_CITE: block plant bottlenecks caused by incomplete line specification].
Why This Line Is Quoted as a Complete System
- Block machinery is our single focus, so the QT18-25 press, mould, stacking system, and material handling are specified as one matched set rather than sourced from separate vendors.
- Configuration is set against the buyer’s actual mix design, local aggregate, and target block format — the capacity calculation names the format it assumes.
- Mould design covers the formats the buyer’s market sells, with custom drawings available when standard moulds do not match.
- Automation level is selectable, so a buyer starting with semi-automatic operation can plan an upgrade path without replacing the press.
- Voltage, frequency, and PLC display language are confirmed before production so the QT18-25 arrives ready for the buyer’s electrical infrastructure and operators.
Documentation & Verification
- Line layout drawing with capacity calculation stating the block format assumed for the QT18-25 cycle time
- Machine specification sheet covering vibration power, hydraulic rating, and stacking height
- Hydraulic and electrical schematics for integration with existing plant wiring and piping
- Voltage, frequency, and PLC language confirmation record before production begins
- Factory test record on the buyer’s specified block format and material mix
- Operation and maintenance manual with wear parts and mould replacement list
Installation, Commissioning & Support
- 2000 m² factory area requirement confirmed against the buyer’s site plan before the QT18-25 line ships
- Electrical supply matching vibration and hydraulic loads totaling over 119 kW, with dedicated circuit breakers
- Machine dismantling for container loading and reassembly sequencing on arrival at the buyer’s plant
- First-run commissioning with parameter adjustment to the buyer’s local aggregate and mix proportions
- Operator training on the PLC person-machine conversation interface covering cycle start, fault response, and mould change
- Wear parts list and mould inventory supplied so replacements are on hand before the first change-out is due
Before You Request a Quote
To build an accurate line proposal for the QT18-25, share the block formats your market requires, the daily volume you need for each format, and the raw materials you can source locally. Include your site dimensions, existing curing yard layout, and the voltage and frequency at your facility. If you have upstream or downstream equipment already in place, let us know so the line can be configured to connect without gaps.
Frequently Asked Questions
Q: How is daily output calculated, and which block format is the 15–25 s cycle time based on?
A: The 15–25 s molding cycle for the QT18-25 is listed without a stated block format or material mix. Daily output can only be calculated once the specific block size, wall thickness, and aggregate blend are defined. We provide a capacity calculation that names the exact format assumed, so you can verify whether the line meets your production target before committing.
Q: What stations are included between the mixer and the stacking station, and where can cycle-time mismatches occur?
A: The pallet-free block production line covers raw material feeding, mixing, press forming, and stacking. Mismatches occur when the mixer delivery rate is slower than the press cycle, or when the stacking station cannot clear finished blocks before the next cycle starts. Each station duty cycle is calculated against the QT18-25 press timing to prevent idle gaps.
Q: The spec sheet mentions pallet size 1350×1350 mm but also describes pallet-free operation — which is correct?
A: This is a point that must be confirmed before the line is finalized. Pallet-free operation means blocks are demolded and stacked directly without production pallets, but some curing or transfer stages may still require a base plate. We resolve this during the layout phase so your curing area and forklift specifications match the actual system delivered.
Q: How do I confirm voltage, frequency, and PLC language before production to avoid commissioning delays?
A: Voltage, frequency, and PLC display language are confirmed in writing before the QT18-25 enters production. This ensures the electrical system matches your facility supply and the operator interface is in a language your team can read, preventing delays when the line arrives on site.
