Full Range Stationary Block Machine – QTJ4-24 PLC Controlled

Matched System Configuration — the QTJ4-24 stationary block machine, mould, pallet, and spiral feeder are specified as one coordinated unit rather than sourced from separate suppliers, so cycle times and block density stay consistent across formats.

Technical Specifications

Application Suitability

What "24 Seconds per Cycle" Actually Means for Your Daily Output

Cycle time is meaningless unless tied to the specific block format, wall thickness, and aggregate you will actually run.

Many quotations list a single molding cycle number without disclosing which block size it was measured on. A 24-second cycle on a thin paving brick is very different from the same machine running a 200 mm hollow block with a dense local aggregate. I once configured a QTJ4-24 for a West African buyer who assumed the quoted daily output applied to every format in his catalogue. When his plant started running 200 mm hollow blocks, the cycle stretched well beyond the listed figure, and daily output dropped significantly. The lesson stuck: every capacity statement must name the format it assumes. [NEED_CITE: block format impact on cycle time in vibration pressing]

When you evaluate any stationary block machine manufacturer, ask for a written capacity table that lists cycle time and daily output separately for each block format you intend to produce. Without that document, you are comparing machines on numbers that do not reflect your actual production plan.

Where the QTJ4-24 Fits in the Full Stationary Range

The QTJ4-24 occupies the entry-to-mid tier of our stationary block machine lineup. It delivers mechanical vibration pressing with automatic spiral material distribution, aimed at buyers who need reliable daily output without the investment of a fully automatic stacking and cubing line. Semi-automatic pallet handling keeps the capital cost accessible while still removing the most inconsistent manual step — material feeding — from the operator’s workload. For a first plant or a contractor producing blocks on a project site, this tier gives you a stationary block machine manufacturer grade platform that can later connect to upstream batching and downstream handling as volume grows.

Matching the Machine to Your Local Aggregate and Mix Design

Every region has different sand gradation, stone hardness, and available cement types. A spiral feeder calibrated for clean, graded sand will behave differently when the local supply carries high clay or silt content. Before we confirm the QTJ4-24 configuration, we ask buyers to send a sample of their actual aggregate so we can assess how it flows through the spiral and compacts under 45 kN vibration. This step prevents the situation where a machine arrives on site and the buyer is forced to source expensive imported sand just to hit target block strength. [NEED_CITE: aggregate properties effect on block compaction and strength]

Reading the Specs That Matter Most for Daily Production

The 45 kN vibration force comes from four vibrators — two 3 kW units mounted below the mould table and two 1.5 kW units above. This dual-level arrangement compacts the mix from both directions, reducing voids and improving block density compared to single-plane vibration. The 350-type reducer on the mold lifting mechanism handles the repeated shock loads of mechanical pressing over long production shifts. An 850×450 mm pallet size determines which block formats you can run and how many cavities each mould carries; it also dictates the curing rack dimensions and forklift capacity you need in your yard. The 11.95 kW total power draw means most small-to-medium plants can run this machine on a standard three-phase supply without a dedicated transformer, though voltage and frequency must still be confirmed to match the local grid before the motor and PLC are built.

The Cost of Skipping Configuration Details Before Shipment

Buyers who confirm a machine order without verifying pallet size against their existing curing racks often discover that standard pallets do not fit their shelving, forcing a yard redesign after the machine arrives. Similarly, a PLC display in a language the operators cannot read slows commissioning by days or weeks, because every parameter adjustment requires translation. When voltage and frequency are assumed rather than confirmed, the motor may arrive wound for a supply that does not exist at the site, leading to rewinding or replacement before the first block is pressed. These are not rare edge cases — they show up regularly in post-delivery support calls. [NEED_CITE: common commissioning delays in exported block machinery]

Why Buyers Source This Tier from a Single Supplier

The QTJ4-24 is specified alongside its moulds, pallets, and handling accessories as one matched system, so the spiral feeder timing, vibration force, and mould cavity volume are all balanced before the machine leaves the factory. We configure the machine against the buyer’s actual mix design and target block format rather than shipping a catalogue default and hoping it works on arrival. Custom mould design is available from buyer drawings, so you can produce the exact block sizes your local market demands without adapting a standard mould after delivery. Installation and commissioning support includes operator training on the specific PLC configuration shipped with your machine, not a generic video. The automation level is selectable — a buyer can start with semi-automatic pallet handling on the QTJ4-24 and later add automatic stacking and cubing modules as production volume justifies the investment.

Documentation & Verification

• Line layout and capacity calculation stating which block format the cycle time assumes
• Machine specification sheet with confirmed voltage, frequency, and PLC language
• Mould drawing and format list showing all block sizes for the 850×450 mm pallet
• Pallet specification matched to buyer’s curing rack and forklift capacity
• Factory test record run on the buyer’s confirmed block format before dispatch
• Operation and maintenance manual with wear parts and mould replacement schedule

Installation, Commissioning & Support

• Foundation plan sized for the 3600×1700 mm footprint and 2 T operating mass with vibration isolation
• Dedicated three-phase circuit rated for the 11.95 kW total draw at confirmed voltage and frequency
• Machine ships partially assembled; mold lifting reducer and vibrator motors are bench-tested before crating
• First-run commissioning includes cycle timing verification on your confirmed block format and aggregate sample
• Operator training covers PLC navigation, spiral feeder adjustment, and mould change procedure on the shipped configuration
• Wear parts list with reorder intervals for vibrator mounts, spiral flighting, and mould liners

Before You Request a Quote

Tell us which block formats you plan to produce — hollow, solid, interlocking, or paving — along with the specific dimensions your market requires. Share your daily output target and the local aggregate type you will feed into the spiral, including any known clay or silt content. Confirm your site voltage, frequency, and the language you need on the PLC display so the control panel is built correctly before the machine ships.

Frequently Asked Questions

Q: How is realistic daily output calculated for the QTJ4-24, and which block format is the 24–26 s cycle based on?
A: The 24–26 s cycle is listed in the source without a stated block format, so we treat it as a reference point rather than a guaranteed output. Realistic daily output is calculated by confirming your target block size, wall thickness, and aggregate, then running a test cycle on that specific configuration. We provide a written capacity table per format with the quotation.

Q: What voltage, frequency, and PLC language options are available for my market?
A: Voltage and frequency are configured to your local supply standard and confirmed before production begins. The PLC display language is selected from available options to match your operator team. Both parameters are locked in writing during the order confirmation stage so the electrical panel and control firmware are correct on arrival.

Q: Which block formats fit the 850×450 mm pallet, and can I order custom moulds?
A: The 850×450 mm pallet accommodates standard hollow blocks, solid blocks, interlocking bricks, and paving bricks within its cavity area. Custom moulds can be designed from buyer drawings to produce non-standard sizes or specialized shapes. We provide a mould drawing and format list showing exactly which configurations fit before you commit to the order.

Q: Where does the QTJ4-24 sit in the full machine range, and what is the upgrade path?
A: The QTJ4-24 is positioned in the entry-to-mid tier of the stationary block machine range, offering mechanical pressing with semi-automatic material feeding. As production volume grows, buyers can add automatic pallet feeding, stacking, and cubing modules to reduce labor and increase throughput without replacing the core press unit.

Q: What is included in the delivery scope — are pallets, moulds, and handling equipment part of the quotation?
A: The quotation specifies exactly which moulds, pallets, and handling accessories are included, so there are no surprise omissions at delivery. Pallet quantity, mould format list, and any supporting equipment like curing racks are all confirmed in the proposal. Items not included are clearly listed so you can source them locally or add them to the order.