Stationary line matched as one system — the QTJ4-40 press, JQ350 mixer, and pallet dimensions are specified together so the host never idles waiting for material or boards.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QTJ4-40 |
| Product Type | Stationary Concrete Block Making Machine |
| Machine Type | Stationary, manual operation with mechanical-electric combination control |
| Rated Power | 10.4 kW |
| Voltage & Frequency | Three-phase four-wire, 100A leakage protector required (basis to be confirmed for target market) |
| Control System | Electric control components with mechanical interworking |
| Overall Dimensions (L×W×H) | 1350 × 1460 × 1800 mm |
| Net Weight | 1200 kg |
| Output Capacity | 2400 pcs/hour based on 400×200×200mm hollow block, 5 pcs per mould (basis to be confirmed for shift hours) |
| Mould Format | 400×200×200mm hollow block (5 pcs/mould included as standard) |
| Cycle Time | 40 seconds |
| Vibration Frequency | 2800 r/min |
| Vibration Method | Table vibration feeding with fluctuation vibration molding |
| Pallet Size | 850 × 450 × 20 mm |
| Automation Level | Manual with electric assist (semi-automatic pallet handling implied) |
| Included Equipment | Host machine 1 set, block mould 1 set, JQ350 mixer |
| Mixer Oil Requirement | 10 kg of 35# gear oil |
| Host Machine Lubrication | 2 kg engine oil |
| Assembly State | Requires on-site installation on flat, solid foundation |
Application Suitability
| Application | Material or Output |
|---|---|
| Small-scale hollow block production plants | Concrete hollow blocks 400×200×200mm from crushed stone, sand, and cement |
| On-site block production for construction contractors | Hollow blocks produced on a flat cement pad at the building site |
| Start-up block plants with limited investment budget | Standard hollow block formats with manual pallet circulation |
| Secondary small-format line for existing plants | Supplementary hollow block output alongside a larger automatic press |
Why "Pieces per Hour" Means Nothing Without the Rest of the Line
A stationary block machine production line only holds its rated cycle time when every upstream and downstream station keeps pace.
I once watched a QTJ4-40 sit idle for half a shift because the mixer was undersized and pallets had to be carried back by hand from a curing area two hundred meters away. The press itself was fine — the bottleneck was everything around it. Buyers who quote a single number for daily output without mapping mixer batch size, pallet circulation count, and curing rack distance end up disappointed on the first production day. [NEED_CITE: material flow and station spacing in small block plants]
How the Mixer and Press Stay in Sync
The JQ350 mixer included with the QTJ4-40 is sized to deliver one batch in roughly the same window the press takes to consume it. At a 40-second cycle, the host pulls material steadily, and any gap in supply means the vibration table runs empty, producing under-compacted blocks. A stationary block machine production line built around this press must keep the mixer within a few meters of the feed hopper so that wheelbarrow or belt transfer does not introduce dead time between batches.
Pallet Circulation and the Curing Area Gap
With an 850 × 450 × 20 mm pallet, each cycle consumes one board. Over a full shift, that means hundreds of pallets in rotation. If the curing area is too far or the pallet return path is blocked, the operator at the press starts waiting. I have seen lines where the buyer ordered fifty pallets thinking that was enough, only to realize they needed well over a hundred to keep the QTJ4-40 running without pauses. [NEED_CITE: pallet circulation requirements in manual block lines]
Reading the Specs That Actually Matter
The 2800 r/min vibration frequency combined with table vibration and fluctuation molding determines how densely the concrete mix is compacted inside the mould cavity. Higher frequency alone does not guarantee block strength — the amplitude and the hydraulic or mechanical pressure applied from above must match the aggregate grading in the buyer’s mix. The 40-second cycle time is achievable only when the mix has the right moisture and the operator feeds the mould completely. Pallet thickness at 20 mm must be checked against the buyer’s existing forklift fork height and curing rack slot dimensions, because switching pallets later is expensive and disruptive.
What Happens When Stations Are Specified Separately
A buyer who purchases the host machine, then sources a mixer and pallets from different suppliers, often finds the mixer output too slow for the press or the pallets too thin to survive repeated vibration cycles. The result is a stationary block machine production line that technically works but never reaches the output the buyer planned for. Mould damage from mismatched vibration force and inconsistent block density across batches are the most common complaints I have seen on these mixed-source setups. [NEED_CITE: consequences of unmatched line components in block production]
Why the Line Should Be Quoted as One Package
When the QTJ4-40, JQ350 mixer, pallets, and mould are specified together, every station is checked against the others before the order is confirmed. The mixer batch volume is matched to the press consumption rate. The pallet size is verified against the buyer’s curing rack spacing and forklift capacity. The mould format is chosen based on the block the buyer’s market actually sells, not a catalogue default. Voltage and control language are confirmed before the machine leaves the factory so commissioning is not delayed on arrival.
Documentation & Verification
- Line layout drawing showing QTJ4-40 station spacing relative to mixer and curing racks
- Capacity calculation stating the 400×200×200mm hollow block format and assumed shift hours
- Pallet specification sheet confirming 850 × 450 × 20 mm size and material grade
- Voltage and electric control language confirmation sheet before dispatch
- Factory test record on the included mould format before shipment
- Operation and maintenance manual covering both host machine and JQ350 mixer
Installation, Commissioning & Support
- Flat, solid concrete foundation required to support the 1200 kg host and vibration forces
- Three-phase four-wire power supply with 100A leakage protector for the 10.4 kW rated load
- 2 kg engine oil for host lubrication and 10 kg 35# gear oil for the JQ350 mixer at first start
- On-site assembly of host, mixer, and pallet stations with spacing per line layout
- Operator training covering 40-second cycle rhythm and mould change procedure
- Wear parts list for vibration table bearings and mould liners supplied with the machine
Before You Send the Inquiry
To size a stationary block machine production line around the QTJ4-40 accurately, share the block format your market demands, the daily output you need across how many shifts, and the local aggregate and cement you plan to use. Confirm your site voltage and frequency, the curing area dimensions you have available, and whether you already own pallets or forklifts that the line must match.
Frequently Asked Questions
Q: What supporting equipment is needed around the QTJ4-40 to form a complete line?
A: The standard package includes the host machine, one block mould set, and a JQ350 mixer. Beyond that, you need pallets cut to 850 × 450 × 20 mm, a flat curing area with rack space for daily output, and a wheelbarrow or belt conveyor to move mixed material from the mixer to the press hopper.
Q: How does the 40-second cycle time translate into daily output when pallet circulation is factored in?
A: The 40-second cycle yields the quoted hourly figure only if pallets return to the press fast enough. In practice, with manual pallet handling and open-air curing, real output depends on how many pallets you own, how far the curing racks sit from the press, and how many workers handle the boards.
Q: Is the JQ350 mixer matched to the press’s material feed rate?
A: Yes, the JQ350 is selected so one batch fills the press hopper at roughly the same rate the QTJ4-40 consumes it. If a buyer substitutes a smaller mixer, the press will idle between batches, dropping daily output well below the quoted capacity.
Q: What foundation and space requirements does a stationary line around this press need?
A: The host weighs 1200 kg and generates vibration at 2800 r/min, so a level concrete pad is essential. You also need space for the mixer within a few meters of the hopper, pallet storage, and a curing area large enough to hold a full day’s production on pallets.
