Matched Line Layout — the QT4-18 press, JQ350 mixer, stacker and pallet handling are specified together so station cycle times align and the press never idles waiting for material or boards.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-18 |
| Product Type | Hydraulic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 3900×1600×2300 mm |
| Total Weight | 3 T |
| Rated Power | 24 kW |
| Vibration Force (Exciting Power) | 40–50 kN |
| Molding Cycle | 15–25 s |
| Pallet Size | 850×550×25 mm |
| Mixer Model | JQ350 |
| Applied Products | Paver, solid block, hollow block, curbstone |
| Raw Materials | Crushed stone, sand, cement, dust, fly ash |
| Output Capacity (400×200×200 mm hollow block) | 1200–1680 pcs/hr (basis: 15–20 s cycle, cavity count to be confirmed) |
| Output Capacity (400×150×200 mm hollow block) | 1800–2400 pcs/hr (basis: 15–20 s cycle, cavity count to be confirmed) |
| Output Capacity (240×115×53 mm solid brick) | 3240 pcs/hr (basis: 15–20 s cycle, cavity count to be confirmed) |
| Stacking Method | Automatic stacker included |
| Automation Level | Semi-automatic |
| Voltage & Frequency | Configurable to buyer’s local grid (basis to be confirmed) |
| Control System | PLC or manual (basis to be confirmed) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for masonry walls | Crushed stone, sand, cement, fly ash |
| Solid brick manufacturing for load-bearing structures | Sand, cement, stone dust |
| Paver and curbstone production for infrastructure | Crushed stone, cement, fine aggregate |
| On-site block production for housing projects | Locally sourced sand and cement |
| First plant setup for building material distributors | Mixed aggregate with cement binder |
Why "Pieces per Hour" Means Nothing Without the Rest of the concrete block making machine production line
A press rating is only as real as the slowest station feeding or clearing it.
Quotations that list only the press output leave buyers discovering after arrival that pallets are stacked by hand, the mixer cannot keep up, or the curing area runs out of space before the shift ends. I have seen plants where the press sat idle for a third of every hour because the material feed was undersized or the stacker was never included in the scope [NEED_CITE: common causes of block plant idle time]. When planning a concrete block making machine production line, every station from raw material feeding through curing rack handling must be matched to the press cycle, or the quoted capacity stays on paper.
Station Matching Around the Press
The JQ350 mixer and raw material feed must deliver a fresh batch within the 15–25 second molding cycle, or the press waits. On this concrete block making machine production line, the mixer capacity and conveyor feed rate are sized against the press output so material arrives continuously. If the mixer runs a batch that takes longer than two press cycles to discharge, the press loses cycles every hour, and daily tonnage drops accordingly.
Pallet Handling and Stacker Synchronization
The 850×550×25 mm pallets move from the press to the automatic stacker and then to the curing area. If the stacker cycle is slower than the press discharge, pallets queue on the conveyor and the press must pause. Pallet quantity must cover the full curing duration plus the return trip — if the curing area holds fewer pallets than one shift produces, output piles up on the floor and must be moved by hand [NEED_CITE: pallet circulation calculation for block curing].
Reading the Specs That Actually Matter
The 40–50 kN vibration force works together with the hydraulic station to compact the mix into dense, consistent blocks. Vibration alone without adequate hydraulic pressure leaves blocks with weak cores; pressure alone without vibration leaves air pockets. The 15–25 second molding cycle covers both the vibration and compression phases, and the exact duration depends on the block format and the mix design. The semi-automatic configuration includes the automatic stacker, which removes the heaviest manual task from the line, while leaving pallet return and raw material feeding for future automation as the plant volume grows.
The Hidden Cost of a Press-Only Quotation
When a buyer receives a quotation that covers only the press, the missing stations surface as unbudgeted costs after the machine arrives. A manual pallet return system requires extra labor every shift. An undersized mixer causes the press to idle between batches. A curing area that was never sized against daily output forces workers to stack blocks on the ground, risking damage and inconsistent curing [NEED_CITE: block curing area sizing against daily output]. These gaps do not show up in the machine spec sheet — they show up on the production floor.
Why Specify the Full Line Here
Block machinery is the single focus of this workshop, so the press, mixer, pallets, stacker and handling equipment are configured as one matched system rather than assembled from separate suppliers. The configuration is set against the buyer’s actual mix design and local aggregate, not a catalogue default, which prevents the strength issues I have seen when a standard recipe meets unfamiliar sand. Mould design covers the formats the buyer’s market actually sells, and the automation level can start semi-automatic and grow as volume increases. Factory testing runs the press, mixer and stacker together before dispatch, catching synchronization problems before they reach the site.
Documentation & Verification
- Line layout drawing showing each station footprint and pallet flow path
- Capacity calculation sheet stating the block format assumed per output figure
- Hydraulic and electrical schematics matching the as-built configuration
- Voltage, frequency and PLC display language confirmation record
- Factory test record with press, mixer and stacker running as a line
- Pallet specification and quantity recommendation tied to curing area size
Installation, Commissioning & Support
- Foundation plan sized for the 3 T machine weight and 40–50 kN vibration load
- Dedicated power circuit rated for the 24 kW total draw at confirmed voltage
- Pallet return conveyor alignment checked against stacker discharge height
- Mixer discharge timing verified against the 15–25 s press molding cycle
- Operator training covering mould change, PLC navigation and daily lubrication
- Wear parts list with hydraulic seal and vibration motor brush replacement intervals
What to Include in Your Inquiry
Provide the target block formats you plan to produce and the daily output you need per format. Share your local raw material type, especially the sand or aggregate source and its moisture content. Confirm your site voltage, frequency, and the control display language your operators read.
Frequently Asked Questions
Q: How is daily output calculated per block format and which station sets the line bottleneck?
A: Daily output is based on the molding cycle of 15–25 seconds multiplied by the mould cavity count for each format, then reduced by the actual availability of the line. The bottleneck is whichever station — mixer discharge, pallet feed, or stacker cycle — runs slowest. The capacity table states the block format assumed so you can compare against your product mix.
Q: Are pallet size, stacker and trolley included in the quotation or supplied separately?
A: The 850×550×25 mm pallets, automatic stacker and trolleys are included in the line quotation. Pallet quantity is recommended based on your curing area size and daily output so that pallets circulate continuously without stacking blocks by hand at shift end.
Q: How do mixer capacity and conveyor feed rate match the press cycle so the press never idles?
A: The JQ350 mixer batch size and discharge time are calculated against the press molding cycle of 15–25 seconds. The conveyor feed rate is set so a fresh batch reaches the press hopper before the previous batch runs out, keeping the press running through the full shift.
Q: What voltage, frequency and control language must be confirmed before the line ships?
A: Your local grid voltage and frequency must be confirmed before production so the motor windings and control transformer are built to match. The PLC display language is also confirmed at this stage so operators can read alarms and cycle parameters from day one of commissioning.
Q: How is the curing area sized against pallet count and daily output to avoid stacking by hand?
A: The curing area must hold enough pallets to cover the full curing duration plus the return loop. We calculate the required pallet count from your daily output and the curing hours your mix design needs, then recommend a curing rack layout that keeps pallets circulating without ground stacking.
