Single-Focus Line Integration — every station from the JS500 mixer through to pallet return is specified against the QT4-18 press cycle so the machine is never left waiting for material, pallets, or an operator clearing cured racks.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-18 |
| Product Type | Stationary Automatic Concrete Block Making Machine |
| Rated Power (Host Machine) | 27.5 kW |
| Voltage | 380 V (frequency 50/60 Hz to be confirmed for target market) |
| Control System | Automatic PLC (display language to be confirmed) |
| Overall Dimensions (L×W×H) | 7100 × 1600 × 2610 mm |
| Net Weight (Host Machine) | 5 T |
| Vibration Force | 40 kN |
| Moulding Cycle | 15 s (basis not stated in source — confirm block format, material and thickness) |
| Pallet Size | 1020 × 570 mm |
| Mixer Model | JS500 |
| General Water Consumption | 4 T / day |
| Workers Required | 3–4 |
| Workshop Area | 150 m² |
| Theoretical Productivity | Stated per block format on request (basis to be confirmed) |
| Mould Formats | Hollow blocks, solid blocks, paving blocks |
| Automation Level | Automatic (stacking and cubing inclusion to be confirmed) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for masonry walls | Crushed stone, sand, cement, water |
| Solid block production for load-bearing structures | Dense aggregate mix with cement binder |
| Paving block production for walkways and yards | Fine aggregate with colour oxide where required |
| On-site block production for housing projects | Locally sourced sand and gravel with Portland cement |
| Small-to-medium block plant start-up | Multi-format output from a single pallet size |
Why a Cycle Time Quote Tells You Almost Nothing About Real Output
A 15-second moulding cycle only matters if every other station in the stationary block machine production line can keep up.
When a buyer receives a single cycles-per-hour figure with no mention of how pallets are fed to the press, how wet blocks are stacked, or how curing racks are moved out of the way, the gap between the quoted number and the real daily count can be severe. I have stood on sites in West Africa where the press sat idle for thirty seconds between every cycle simply because the operator was still clearing the last pallet by hand. The mixer had already discharged, the material was ready, but the line stalled at the one station nobody had specified [NEED_CITE: typical idle cycle losses in manual block plants]. The stationary block machine production line only earns its name when pallet feed, press cycle, stacking and curing rack handling are all matched — station by station, second by second.
How the JS500 Mixer Keeps the Press Fed Without Over-Supply
The JS500 twin-shaft mixer carries a batch volume sized so that a full discharge lands in the hopper just as the QT4-18 finishes its current moulding cycle. If the mixer is too small, the press starves and the vibration table runs empty for several seconds, producing under-compacted blocks. If the mixer is too large, material sits in the hopper losing workability before the next cycle draws it down. Matching batch weight to cycle time is what keeps block density consistent from the first pallet of the shift to the last.
Where Pallet Size Meets the Curing Yard You Already Have
The 1020 × 570 mm pallet was chosen so that standard curing rack slots accept it without modification and a common warehouse forklift can lift a loaded rack in one pass. When a line arrives with a pallet dimension that does not fit the buyer’s existing racks, the result is a curing bottleneck: wet blocks pile up on the workshop floor, edges chip, and the stacking area becomes a hazard. Specifying pallet thickness and material against the forklift capacity already on site is part of configuring the turnkey block making line before the container is sealed.
Reading the Specs That Actually Shape Daily Production
Vibration force at 40 kN works together with hydraulic pressure to compact the mix inside the mould cavity; higher force pushes aggregate particles tighter, but only if the hydraulic clamp holds the mould box rigidly against the vibration table — without that clamping force, energy dissipates into the frame instead of the mix [NEED_CITE: vibration and hydraulic pressure interaction in block compaction]. The 27.5 kW host machine rating covers the vibration motor, hydraulic pump and conveyor drives on the press itself; the JS500 mixer and auxiliary stations add their own loads, so the total connected capacity must be calculated before the supply cable is pulled. Workshop footprint of 150 m² includes press, mixer, pallet return belt and stacking zone in a single coordinated layout, meaning a buyer can mark out the floor before the equipment arrives rather than improvising aisles on the first production day.
The Hidden Cost of Treating the Press as an Island
When stacking and curing rack handling are left out of the quotation, the buyer arrives on site to discover that three or four extra workers are needed just to move wet pallets by hand. Output drops because the press operator slows the cycle to match the pace of the manual crew, and the pallet return belt — if one exists at all — jams under the weight of blocks nobody had time to clear. Voltage mismatches compound the problem: a 380 V 50 Hz motor running on a 60 Hz supply spins faster, overheats, and the first failure is often blamed on the machine rather than the grid [NEED_CITE: voltage and frequency mismatch consequences for industrial motors]. Every one of these issues could have been addressed during configuration if the line had been quoted as a connected system rather than a standalone press.
Why Buyers Source the Full Line from One Specification Point
Block machinery is the single focus here, so the QT4-18 press, JS500 mixer, pallet feeder, stacking station and curing rack handler are all specified against the same block format and mix design rather than assembled from unrelated catalogues. Configuration is set against the buyer’s actual local aggregate — clay content, maximum particle size, moisture — not a default laboratory sand. Mould design covers the hollow, solid and paving formats the buyer’s market moves, and custom drawings are available when a project calls for a non-standard kerb or interlocking profile. Automation level is selectable, allowing a first-time buyer to begin with semi-automatic pallet handling and add automatic stacking later. Installation support includes operator training at the buyer’s site so the crew knows how to adjust vibration time for a new aggregate source without calling for remote help.
Documentation & Verification
- Line layout drawing showing every station from aggregate feeder to curing rack exit with cycle time stated per block format
- Machine specification sheet confirming 27.5 kW host power, 40 kN vibration force and 1020 × 570 mm pallet size
- JS500 mixer data sheet matched to QT4-18 batch demand with discharge timing noted
- Pallet material and thickness specification checked against buyer’s existing rack spacing and forklift capacity
- Voltage, frequency and PLC display language confirmation signed off before production begins
- Factory test record on buyer’s target block format before container loading
Installation, Commissioning & Support
- 150 m² workshop footprint marked out with foundation bolt positions for the 5 T host machine and JS500 mixer base
- 380 V three-phase supply with dedicated breaker sized to total connected kW of press plus mixer and auxiliaries
- Host machine shipped partially dismantled to fit a standard container; re-assembly supervised on site
- PLC programme and vibration time parameters set during first run using buyer’s own aggregate sample
- Operator training covers mould change procedure and daily greasing points on the vibration table and hydraulic rams
- Wear parts list covering mould liners, vibration springs and hydraulic seals supplied with the first shipment
Before You Send an Inquiry
To configure a stationary block machine production line that actually matches your site, share the block formats you intend to sell, the daily output you need for each format, and a sample or lab report of your local aggregate. Confirm the voltage and frequency available at your plant along with the PLC display language your operators will use. If you already have curing racks and a forklift, send the rack slot dimensions and the forklift’s rated pallet load so the pallet specification can be verified before the line is built.
Frequently Asked Questions
Q: How is daily output calculated, and which block format is the capacity based on?
A: Capacity is stated per block format because a 15-second cycle on a small paving block yields more pieces per hour than the same cycle on a large hollow block. We provide a written calculation naming the exact format, mould cavity count and assumed cycle time so the figure can be checked against your production target.
Q: Are pallet feeding, stacking and curing rack handling included or priced separately?
A: Each auxiliary station is listed as a separate line item in the quotation, so you see exactly what is inside the turnkey block making line scope and what remains optional. This prevents arriving on site to find critical handling stations were never ordered.
Q: How do I confirm the pallet size works with my existing curing racks and forklift?
A: Send us the internal width and depth of your rack slots together with your forklift’s rated capacity. We cross-check against the 1020 × 570 mm pallet and advise whether the standard size fits or a custom pallet dimension is needed before production starts.
Q: What voltage, frequency and PLC language will ship with the line?
A: These three parameters are confirmed in writing during the configuration stage, not left to assumption. The PLC display language is set to match your operators, and the motor winding is specified for the exact voltage and frequency at your site.
Q: How is the mixer capacity matched to the press cycle?
A: The JS500 batch volume is calculated so that a full discharge fills the press hopper just as the previous batch is consumed, keeping material fresh and preventing the vibration table from running empty between cycles.
