Matched System Sizing — the QT4-20 press is configured alongside raw material feeding, mixing, pallet handling, and stacking so every station connects and cycle times align to block format.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-20 |
| Product Type | Semi-Automatic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 7100×1600×2610mm |
| Rated Hydraulic Pressure | 16-21MPa |
| Main Vibration Form | Platform Vibration |
| Vibration Frequency | 4600 r/min |
| Pallet Size | 950×500mm |
| Molding Cycle | 20-30s (basis for capacity calculations) |
| Overall Power | 27.5kW |
| Output: Hollow Brick 400×200×200mm | 480-720 pcs/h (basis: 4 pcs/mould, 20-30s cycle) |
| Output: Hollow Brick 400×150×200mm | 600-900 pcs/h (basis: 5 pcs/mould, 20-30s cycle) |
| Output: Hollow Brick 400×100×200mm | 960-1440 pcs/h (basis: 8 pcs/mould, 20-30s cycle) |
| Output: Paver Block 200×100×60mm | 1920-2880 pcs/h (basis: 16 pcs/mould, 20-30s cycle) |
| Output: Solid Brick 240×115×53mm | 3360-5930 pcs/h (basis: 28 pcs/mould, 20-30s cycle) |
| Hydraulic System | Yes, main forming method |
| Monitoring | Non-contact proximity switch |
| Control System | PLC |
| Finished Block Strength | ≥15MPa |
| Automation Level | Semi-Automatic |
| Warranty | 1 year for whole machine (excluding spare parts) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for residential and commercial walls | Sand, cement, fly ash, crushed stone |
| Paver block production for walkways, driveways, and plazas | Sand, cement, fine aggregate, pigment |
| Solid brick production for load-bearing masonry | Sand, cement, slag, gangue |
| Curbstone and kerb production for road edges | Coarse aggregate, cement, sand |
| Grass-growing block production for permeable landscaping | Cement, aggregate, organic fiber mix |
What "Capacity per Hour" Leaves Out of a Block Line Proposal
Output figures only hold when the upstream mixer and downstream pallet handler keep pace with the press cycle.
A common complaint I hear from plant owners is that their concrete block production line equipment was quoted with an hourly capacity based on one specific format, but their daily mix includes three or four formats with different cycle times. When the mixer cannot deliver fresh material fast enough for a short-cycle paver run, or the pallet feeder jams on a heavier pallet type, the press sits idle. The result is a daily tally far below the brochure number, and no single station can be blamed in isolation. [NEED_CITE: block production line station synchronization standards]
Station Matching from Mixer to Curing Rack
The QT4-20 block making machine supporting equipment must be specified as a connected chain. The mixer discharge rate has to match the press demand during the fastest molding cycle, and the pallet feeder must deliver boards without pause. Any mismatch introduces idle seconds that accumulate across a shift.
Why Line Layout Matters Before Machine Selection
A plant layout drawn around the QT4-20 confirms whether the curing rack system, the stacking position, and the forklift path can handle the output volume at peak cycle. I have walked through sites where the curing area was too small for the pallet size chosen, forcing double-handling that erased any throughput advantage the press offered. [NEED_CITE: concrete curing area sizing by pallet dimension]
Reading the Specs Against Your Local Aggregate
The 16-21MPa hydraulic pressure combined with platform vibration at 4600 r/min must be matched to the buyer’s mix design. Coarse, angular aggregate demands more vibration energy to compact, while fine sand with high clay content absorbs pressure differently. Without a sample test, the rated pressure is only a starting point, not a guarantee of block strength.
Pallet Size, Forklift Compatibility, and Curing Flow
The 950×500mm pallet is a functional link between the press and the rest of the yard. If your existing forklift tines are wider than this pallet or your curing racks were built for a different dimension, every pallet will require manual adjustment. Confirming pallet material — wood, bamboo, or composite — also affects pallet weight and how many can be stacked safely during curing.
The Cost of Skipping Line Integration
When the press is ordered alone and supporting stations are added later from different suppliers, cycle times rarely align. A mixer that discharges too slowly leaves the QT4-20 waiting, and a manual pallet return system creates a bottleneck that semi-automatic operation cannot overcome. The buyer pays for a capacity the line never reaches, and resolving the mismatch after installation costs more than specifying the complete concrete block production line equipment from the start. [NEED_CITE: post-installation line modification costs]
Why Source the Line as One Package
Specifying the QT4-20 alongside its block making machine supporting equipment from one supplier means the pallet size, vibration force, and hydraulic pressure are chosen against your actual raw material test results, not a catalogue default. The line layout states which block format each capacity figure assumes, so your investment matches your market. Moulds are designed for the formats your buyers actually order, and the semi-automatic configuration leaves room to add stacking or cubing automation later without replacing the press. Voltage, frequency, and PLC language are confirmed before production starts, avoiding commissioning delays on arrival. [NEED_CITE: single-supplier line integration benefits]
Documentation & Verification
- Line layout showing capacity calculation per block format and station cycle match
- Machine specification sheet with pallet size, vibration frequency, and hydraulic pressure confirmed
- Mould drawing and format list matching your local market block dimensions
- Hydraulic and electrical schematic for local maintenance team reference
- Factory test record on your specified raw material mix before dispatch
- Voltage, frequency, and PLC display language confirmation document
Installation, Commissioning & Support
- Foundation must support 7100×1600mm footprint with anchor points for platform vibration isolation
- Power supply must deliver 27.5kW at confirmed voltage and frequency with dedicated circuit breaker
- Machine arrives secured by steel bracing inside container, dismantled for reassembly on site
- Commissioning includes cycle time verification against each block format in your mould list
- Operator training covers PLC navigation, mould change procedure, and proximity switch monitoring
- Wear parts and hydraulic seal kit listed for first-year maintenance planning
Before You Send an Inquiry
Share your target block formats with dimensions, the daily output you need per format, and a sample of your local raw material so we can run a mix test. Let us know your existing curing rack dimensions, forklift specifications, and the voltage and frequency at your site. This information allows us to map the complete concrete block production line equipment around the QT4-20 so every station connects without idle time.
Frequently Asked Questions
Q: How is daily output calculated, and which block format does each capacity figure assume?
A: Each hourly figure in the QT4-20 specification is tied to a specific block dimension and mould cavity count, calculated on a 20-30 second cycle. Daily output is then derived by multiplying the hourly rate by your planned production hours, minus time allocated for mould changes and pallet loading interruptions.
Q: What upstream and downstream equipment must match the QT4-20 cycle time?
A: The mixer must discharge enough fresh material per batch to fill the mould within the molding cycle, and the pallet feeder must return boards at the same rate. Downstream, the stacking area and curing racks must accept the pallet volume the press produces at its fastest format without congestion.
Q: Is the 950×500mm pallet chosen to fit my curing area and forklift?
A: The pallet dimension must be confirmed against your existing curing rack spacing and forklift tine width. If your current yard infrastructure was built for a different pallet size, we adjust the specification before production so pallets move from press to rack to truck without manual repositioning.
Q: Can I start semi-automatic and add automatic stacking later?
A: The QT4-20 is built with a semi-automatic control architecture that allows a stacking or cubing module to be integrated later. The PLC and pallet system accommodate this upgrade path, so you can expand automation as production volume grows without replacing the press or altering the foundation.
Q: What voltage, frequency, and PLC language will the line ship with?
A: These parameters are confirmed with the buyer before production begins. The electrical system is built to match your site supply, and the PLC display language is set to your operator’s preference so commissioning proceeds without translation delays once the concrete block production line equipment arrives.
