Description
Hydraulic-Vibration Matched as One System — The QT4-15 is specified against your actual mix design and local aggregate, so block strength is determined by engineering choices made before shipment, not by guesswork on the factory floor.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-15 |
| Product Type | Automatic Hydraulic Block Making Machine |
| Overall Dimensions (L×W×H) | 7100×1600×2610 mm |
| Net Weight | 5800 kg |
| Rated Power | 27.5 kW |
| Voltage & Frequency | 380V or configurable to buyer needs |
| Control System | PLC (brand and language configurable) |
| Vibration Force (Exciting Force) | 60 kN |
| Pallet Size | 1020×850×40 mm |
| Automation Level | Automatic |
| Standards | ISO9001:2008, CE |
Production capacity by block format (basis: confirmed cycle timing per format)
| Block Format | Pcs per Mould | Pcs per Hour | Pcs per Day |
|---|---|---|---|
| 400×200×200 mm hollow block | 4 | 960 | 7680 |
| 400×150×200 mm hollow block | 6 | 1440 | 11520 |
| 225×112.5×53 mm solid brick | 16 | 3840 | 30720 |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for wall construction | Crushed stone, sand, cement, and water mix |
| Solid brick manufacturing for load-bearing structures | Fine aggregate blended with Portland cement |
| Paver and kerbstone production for landscaping | Coarse aggregate with pigment additives for colored output |
| On-site block production for housing projects | Locally sourced aggregate reducing transport costs |
| Block plant format diversification | Multiple mould formats on a single pallet size |
Why PLC Language Should Be Confirmed Before the Price Is Signed
A control panel the operator cannot read is not an automatic machine — it is a very expensive manual one.
The automatic QT4-15 block making machine PLC controlled relies on an interface the operator trusts and understands. When the display defaults to a language the plant crew does not read, fault codes go unrecognized, cycle parameters stay at factory defaults, and a commissioning that should take hours stretches into days. I have stood on a site in West Africa watching a crew of six unable to reset a simple alarm because the message was in a script none of them could parse. [NEED_CITE: PLC interface language and operator comprehension on industrial machinery]
The voltage question belongs in the same pre-production conversation. A 380V motor connected to a local supply that runs at a different frequency will overheat, trip breakers, or fail within weeks. Confirming voltage, frequency, and PLC display language in writing before production prevents the most common arrival-day failures.
Sequencing Control That Removes Operator Variables
The QT4-15 uses a PLC to manage the full pressing cycle — feed, vibration, hydraulic compression, and pallet advance — in a fixed sequence every time. On a semi-automatic press, the operator decides when to stop vibration and when to release pressure, introducing variation that shifts from the morning shift to the afternoon shift. The automatic QT4-15 block making machine PLC controlled removes that decision point, so the block that leaves the press at 7 AM has the same density as the one at 4 PM.
Batch-to-Batch Consistency Across Format Changes
When a plant switches from hollow blocks to solid bricks, the cycle parameters must change: vibration duration, hydraulic dwell time, and feed volume all differ between formats. The PLC stores parameter sets per mould, so a format change is a recall, not a negotiation between the operator and the machine. This repeatability matters most in plants that sell multiple block formats to the same market and need every batch to meet the same compressive strength standard. [NEED_CITE: block compressive strength consistency across production batches]
Reading the Numbers That Matter
The vibration force of 60 kN and the hydraulic pressure work together — vibration re-arranges the aggregate particles into a dense packing, and hydraulic pressure locks that arrangement before the block leaves the mould. If vibration dominates without sufficient hydraulic clamp, the block is dense but the edges crumble. If hydraulic pressure overwhelms vibration, the block is smooth but internally weak. The 27.5 kW rated power is the budget that runs both systems simultaneously at the intensities the QT4-15 requires for its target formats.
The pallet size of 1020×850×40 mm is not arbitrary — it defines the footprint of every curing rack slot, every forklift tine spacing, and every stacking frame the plant already owns or plans to buy. Specifying pallet size to match the curing infrastructure prevents a scenario where freshly pressed blocks have nowhere to go except the floor. The net weight of 5800 kg reflects a frame built to absorb 60 kN of vibration force cycle after cycle without loosening bolts or cracking welds over years of operation.
What Happens When Automation Assumptions Are Wrong
A buyer who selects an automatic press without confirming the pallet handling and stacking arrangement may find that the output piles up faster than the crew can move it by hand. The press keeps cycling on schedule, but blocks sit on the pallet line waiting for someone to carry them to the curing area. That bottleneck was not in the quotation, and it was not in the capacity calculation. [NEED_CITE: block plant pallet handling bottleneck after press upgrade]
Similarly, a machine configured for a sand-to-cement ratio the buyer cannot source locally will produce blocks that look right but fail the strength test, or blocks that pass the test but cost more per unit than the market will pay. The mix design conversation must happen before the machine is built, not after it arrives.
Why Procurement Through This Channel Works
Block machinery is the single focus here, which means the QT4-15 is specified as a complete system — press, mould, pallet, and handling — rather than assembled from separate supplier quotations that arrive with incompatible pallet dimensions. The configuration is set against the buyer’s actual mix design and target block format, not pulled from a catalogue default row.
Mould design covers the formats the buyer’s market actually sells, with custom mould engineering available from buyer drawings when a non-standard format is needed. The automation level is selectable: a buyer can start with the automatic press and manual pallet handling, then add stacking and cubing later as labour costs shift. Installation and commissioning support includes operator training so the crew understands parameter adjustments, mould change procedure, and daily maintenance from the first production day.
Documentation & Verification
- Line layout and capacity calculation stating the block format assumed for each output figure
- Machine specification sheet with hydraulic and electrical schematic for the QT4-15
- Mould drawing and format list showing cycle time per block type
- Pallet specification matched to curing rack dimensions and forklift capacity
- PLC display language and voltage confirmation recorded before production
- Factory test record on buyer-specified block format before dispatch
Installation, Commissioning & Support
- Foundation must support the 5800 kg machine weight plus dynamic vibration loads at 60 kN
- Dedicated power circuit rated for the 27.5 kW system with correct voltage and frequency
- Machine arrives with PLC pre-loaded with buyer-confirmed language and parameter sets
- Commissioning includes test runs on the buyer’s local aggregate and mix design
- Operator training covers mould change procedure and PLC parameter recall per format
- Wear parts and hydraulic seal list provided for first-year maintenance planning
Starting the Conversation
To size the QT4-15 correctly for your plant, share the block formats your market sells and the daily volume each format requires. Provide your local aggregate type and the mix ratio you currently run or plan to run, so vibration and hydraulic settings can be matched before production. Confirm the voltage and frequency at your site, the language your operators need on the PLC display, and the pallet size your existing curing racks and forklifts are built around.
Frequently Asked Questions
Q: How is the QT4-15 capacity verified per block format, and what cycle time applies?
A: Capacity is calculated per block format, not quoted as a single number. Each format — hollow block, solid brick, paver — has its own mould cavity count and cycle time. The capacity document provided with the quotation states the format assumed for each output figure, so daily production planning matches what the machine actually delivers on your chosen product mix.
Q: What PLC display languages are available at delivery?
A: The PLC display language is confirmed in writing during the pre-production stage, before the machine is built. This prevents the common commissioning delay where the operator cannot read fault codes or parameter labels. The language choice is recorded alongside voltage and frequency confirmation to ensure the control panel arrives ready for your crew.
Q: Can the automation level be upgraded after initial installation?
A: The QT4-15 supports a progressive automation path. A buyer can start with the automatic press cycle and manual pallet handling, then add automatic stacking and cubing later as the plant grows. The PLC architecture accommodates additional stations without requiring a full control system replacement, protecting the initial investment.
Q: How does vibration and hydraulic pressure get matched to local aggregate?
A: The vibration force and hydraulic pressure settings are configured based on the buyer’s local aggregate type, mix design, and target block strength requirement. Different aggregates — crushed granite versus river sand versus volcanic scoria — respond differently to vibration frequency and hydraulic dwell time. Settings are confirmed before production so the machine arrives tuned to your material.
