Description
Matched Vibration Control — PLC parameters on the QT4-15 are tuned against your submitted mix sample rather than a default table, so vibration force and hydraulic pressure stay aligned with your local aggregate from the first shift.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15A |
| Product Type | Automatic Concrete Block Making Machine |
| Overall Dimensions | 7100 × 1600 × 2610 mm |
| Molding Cycle | 15–25 s |
| Vibration Frequency | 4600 r/min |
| Exciting Power | 40–50 kN |
| Rated Power | 18.45 kW |
| Mixer | JQ350 |
| Pallet Size | 850 × 550 × 25 mm |
| Total Weight | 3 T |
| Output Capacity | 408 pcs/h based on 400×200×200 mm hollow block, 4 pcs/mould |
| Output Capacity | 510 pcs/h based on 400×150×200 mm hollow block, 5 pcs/mould |
| Output Capacity | 2100 pcs/h based on 240×115×53 mm solid brick, 18 pcs/mould |
| Daily Output | 3264 pcs/8 hr based on 400×200×200 mm hollow block |
| Daily Output | 4080 pcs/8 hr based on 400×150×200 mm hollow block |
| Daily Output | 17000 pcs/8 hr based on 240×115×53 mm solid brick |
| Applied Products | Hollow block, solid brick, paver, curbstone |
| Raw Materials | Crushed stone, sand, cement, dust, fly ash |
| Automation Level | Semi-automatic (source value — verify against manufacturer catalog) |
| Control System | (source value — verify against manufacturer catalog) |
| Voltage & Frequency | (source value — verify against manufacturer catalog) |
| Hydraulic Pressure | (source value — verify against manufacturer catalog) |
| Mould Change Time | (source value — verify against manufacturer catalog) |
| PLC Display Language | (source value — verify against manufacturer catalog) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production | Crushed stone, sand, cement, fly ash blends |
| Solid brick production | Cement and fine aggregate mixes |
| Paver manufacturing | Dense aggregate and cement combinations |
| Curbstone forming | Coarse crushed stone with cement binder |
| On-site contractor production | Locally sourced river sand and stone dust |
What "Cycles per Hour" Hides About Your Real Output
Every capacity figure must name the block format it assumes — otherwise the number is meaningless on the shop floor.
I have stood in plants across West Africa where the automatic QT4-15 block machine PLC controlled setup was quoted at a single cycles-per-hour figure. The buyer expected that rate across every mould they ran. When they switched from 400×200×200 mm hollow blocks to 240×115×53 mm solid bricks, the cycle time shifted, the pallet pattern changed, and the stacking rhythm no longer matched. [NEED_CITE: block machine capacity calculation standards by format] The gap between quoted output and actual daily production is almost always a format assumption problem, not a machine defect. That is why every capacity row in the table above states the exact block dimensions and pieces per mould behind it.
How PLC Sequencing Coordinates the Press Cycle
The automatic QT4-15 block machine PLC controlled logic ties pallet feeding, vibration, hydraulic pressing, and block discharge into one timed sequence. Each step waits on a sensor confirmation before the next begins, which means a delayed pallet does not cause the press to fire empty. The molding cycle runs between 15 and 25 seconds depending on the block format loaded, and the PLC holds that timing constant across every shift.
Where Automation Removes the Operator Variable
On manual or relay-controlled lines, the operator decides when to trigger vibration and when to release pressure. That introduces inconsistency between morning and afternoon batches, especially when crew fatigue sets in. The PLC on this automatic QT4-15 block machine PLC controlled system removes those timing decisions entirely. Vibration frequency stays locked at 4600 r/min and the exciting power holds between 40 and 50 kN for every single cycle. [NEED_CITE: PLC versus relay control consistency in block production] Batch-to-batch density variation narrows because the control logic does not drift with operator attention.
Reading the Specs That Shape Your Daily Run
The 7100 × 1600 × 2610 mm footprint tells you the press itself fits a modest bay, but you still need clearance for pallet circulation and curing rack access on both sides. The 850 × 550 × 25 mm pallet size must match the curing area shelving you already have — ordering a machine with a pallet your forklift cannot stack wastes floor space. Rated power at 18.45 kW including the JQ350 mixer means you need a dedicated circuit with enough headroom for start-up surge. Vibration frequency at 4600 r/min paired with 40–50 kN exciting power is suited to medium-density hollow blocks and solid bricks; if your local aggregate is unusually abrasive or high in clay, the vibration parameters need adjustment before the first production run. The 3 T total weight reflects a frame built to absorb repeated vibration without fastener loosening over time.
The Cost of Skipping the Voltage Conversation
I have seen machines arrive at port with a 380 V / 50 Hz motor when the local grid runs 415 V / 60 Hz. The automatic QT4-15 block machine PLC controlled system cannot be commissioned until the motor and PLC transformer are swapped — and those parts often take weeks to source locally. [NEED_CITE: industrial voltage and frequency mismatches in emerging markets] Confirming voltage, frequency, and PLC display language before production starts costs nothing. Discovering the mismatch after the container is opened costs you idle crew, delayed project timelines, and emergency air freight for replacement components.
Why Sourcing This Machine Here Makes Sense
Block machinery is the single focus of this manufacturing operation, so the QT4-15 press, mould, pallet, and handling equipment are specified as one matched system rather than assembled from unrelated suppliers. Configuration is set against your actual mix design and local aggregate sample, not pulled from a catalogue default. Mould design covers the formats your market sells, and custom drawings are accepted when standard options do not fit. Automation level is selectable — you can begin with semi-automatic pallet handling and add automatic stacking later as volume justifies the investment. Installation support includes on-site commissioning with operator training so your crew understands the PLC interface from day one.
Documentation & Verification
- Line layout drawing with capacity stated per block format, not a single blanket figure
- Machine specification sheet matching the exact QT4-15A configuration you ordered
- Hydraulic and electrical schematic for local maintenance troubleshooting
- Voltage and PLC display language confirmation signed before production begins
- Factory test record showing cycle times on your chosen mould set
- Wear parts and mould compatibility list for reorder planning
Installation, Commissioning & Support
- Foundation pad must support the 3 T machine weight plus dynamic vibration loads across the 7100 mm length
- Dedicated power circuit sized for 18.45 kW rated draw with start-up surge allowance
- Machine ships partially dismantled; reassembly requires overhead clearance above 2610 mm
- PLC parameters calibrated on-site against your actual raw material mix during commissioning
- Operator training covers mould change procedure, PLC fault codes, and daily lubrication points
- Wear parts list provided so you can stock seals and vibration pads before first replacement is due
Before You Send an Inquiry
To match the QT4-15A to your plant, share the block formats you sell most, your target daily output per format, and a sample or description of your local aggregate and sand. Include your site voltage and frequency, the PLC display language your operators need, and the pallet size your existing curing racks accept. If you plan to add automatic stacking or cubing later, mention that so the base configuration leaves room for the upgrade.
Frequently Asked Questions
Q: How is output capacity calculated per block format, and what cycle time does each format assume?
A: Every capacity figure states the exact block dimensions and pieces per mould. For example, 408 pieces per hour is based on 400×200×200 mm hollow blocks at 4 per mould, while 2100 pieces per hour assumes 240×115×53 mm solid bricks at 18 per mould. The molding cycle runs 15–25 seconds depending on the format loaded.
Q: What PLC control options and display languages are available for my market?
A: The PLC display language is confirmed with you before production starts, matching the language your operators read. Voltage and frequency are also locked in at that stage so the control cabinet arrives ready for your local grid without transformer swaps or rewiring on site.
Q: Can I start with semi-automatic operation and upgrade to full automatic stacking later?
A: Yes. The QT4-15A can be configured with semi-automatic pallet handling at the start. When your volume grows, automatic stacking and cubing stations can be added to the line without replacing the press itself, protecting your initial investment.
Q: How is the vibration force and hydraulic pressure matched to my local aggregate and mix design?
A: You send a sample or detailed description of your local sand, crushed stone, and cement blend. The vibration frequency and exciting power range are then set against that specific mix so the blocks reach target density without cracking during demoulding or curing.
Q: What automation level do I need based on my daily output target and available labour?
A: Semi-automatic operation suits smaller plants where labour is affordable and daily volume is moderate. If your target output approaches the upper daily figures shown above and you want consistent batch quality across multiple shifts, moving to PLC-controlled automatic pallet feeding and stacking reduces operator dependency.
