QTJ4-24 Semi Automatic Block Making Machine | Full Range

Single-Machine Focus — the QTJ4-24 is specified as a matched press, pallet, and mould system rather than a standalone unit pulled from a catalogue, so every capacity figure ties back to the block format you actually sell.

Technical Specifications

Application Suitability

What a "24-Second Cycle" Actually Means for Your Output

Cycle time only matters when the block format behind that number is stated in plain terms.

Many quotations for a Semi-Automatic Block Machine QTJ4-24 for sale list a cycle figure and then multiply it by shifts per day, arriving at an annual capacity that sounds convincing until the first production run. The QTJ4-24 completes one press cycle in 24–26 seconds, but that figure was measured on a 400×200×200mm hollow block at four pieces per mould. Swap to a 240×115×53mm standard brick and the mould holds 21 pieces per cycle, which changes your daily throughput calculation entirely. I once saw a buyer in West Africa plan an entire delivery schedule around a single cycle-time number, only to find his real-world output on solid bricks was a different story. The honest move is to ask which format the cycle time assumes and then rebuild the math from there. [NEED_CITE: block format and cycle time relationship in concrete masonry production]

Where the QTJ4-24 Fits in the Full Machine Range

The QTJ4-24 sits at the entry tier of Shiyue’s semi-automatic lineup, aimed at buyers who need a working block plant without the footprint or capital outlay of a fully automatic line. Its 3.5-tonne weight and 3.6-metre length keep the plant floor compact, yet the pallet size of 900×450mm leaves room to step up to larger formats later within the same handling ecosystem. For an entrepreneur setting up a first block plant or a contractor producing on-site, this tier offers a balance between manual labour and mechanical consistency that heavier tiers do not justify at lower volumes. The Semi-Automatic Block Machine QTJ4-24 for sale is positioned as a starting point, not a ceiling.

Matching the Line Around the Press

A press never works alone — the mixer, belt conveyor, and pallet handling must keep pace with the 24–26 second moulding cycle or the operator is left waiting. Shiyue pairs the QTJ4-24 with a J350 or JQ500 vertical mixer and a 6m or 8m belt conveyor so that fresh mix arrives at the hopper before the next cycle begins. Because the pallet dimensions are fixed at 900×450mm, the curing racks and any forklift you already own can be checked against that number before the machine ships, avoiding the common surprise of pallets that do not fit existing shelving. [NEED_CITE: concrete block curing and pallet handling standards]

How Vibration, Pressure, and Pallet Size Shape Block Quality

Table vibration feeding combined with fluctuation vibration molding gives the QTJ4-24 a two-stage compaction approach: the first vibration settles material into the mould cavity, the second densifies it under mechanical pressure. This matters most when local aggregate is angular or poorly graded, because a single-stage vibration often leaves voids in the block wall. The 900×450mm pallet is thick enough to absorb vibration energy without cracking under repeated cycles, and its footprint matches standard curing-rack spacing in small plants. Electrical control with mechanical interlocking prevents the press from firing if the pallet is misaligned — a simple safeguard that reduces mould damage during manual pallet handling. The 11.95kW main machine power is within reach of a standard workshop supply, but wiring must follow the stated 3×16mm² general and 3×6mm² main-machine spec to avoid voltage drop during peak draw. [NEED_CITE: vibration compaction principles in concrete block manufacturing]

The Hidden Cost of Overlooking Voltage and Control Language

Shipping a block machine without confirming the site voltage and control-panel language is a mistake I watched play out firsthand when a unit arrived in Pakistan with a 380V/50Hz motor on a 440V/60Hz supply and a Chinese-only display. Three weeks of idle time, a replacement motor, and a translated control overlay later, the buyer finally started production. With the QTJ4-24, the electrical control cabinet and all motor windings must be matched to the destination grid before the wiring harness is cut. Skipping this step does not just delay commissioning — it can shorten motor life and void warranty coverage. [NEED_CITE: voltage and frequency standards by export market]

Why Buyers Place the QTJ4-24 Order Here

• Block machinery is Shiyue’s single focus, so the QTJ4-24’s mould, pallet, and mixer are sourced and tested as one line rather than assembled from unrelated suppliers.
• Mould design covers the formats listed above and can be re-drawn to buyer specifications, so the machine produces what your local market actually buys.
• The semi-automatic tier leaves an upgrade path open — buyers can add automatic pallet feeding or stacking stations later without replacing the press itself.
• Voltage, frequency, and control-panel language are confirmed in writing before production starts, eliminating the on-site surprises described earlier.
• Factory testing records are kept per machine, giving you a baseline to compare against once the QTJ4-24 is assembled on your floor.

Documentation & Verification

• Line layout drawing showing QTJ4-24 footprint with 900×450mm pallet flow
• Capacity calculation sheet stating block format assumed for each output figure
• Mould drawing and format list for all supplied cavity layouts
• Electrical schematic confirming voltage, frequency, and wiring cross-sections
• Factory test record on your target block format before dispatch
• Operation and maintenance manual in confirmed control-panel language

Installation, Commissioning & Support

• Foundation pad sized for 3600×1700mm base and 3.5T static load
• Dedicated circuit matching confirmed voltage and 11.95kW main-machine draw
• Machine arrives dismantled; on-site assembly includes vibration-table alignment
• First-run cycle verification on your chosen 400×200×200mm or custom format
• Operator training covers mould change, pallet feed, and mechanical interlock checks
• Wear-parts list supplied with recommended reorder intervals for vibration springs

Planning Your QTJ4-24 Inquiry

To size the Semi-Automatic Block Machine QTJ4-24 for sale correctly, share the block format you sell most, your target daily output per format, and the raw materials available locally. Include your site voltage and frequency, the control-panel language your operators need, and whether you already have curing racks or a forklift that the 900×450mm pallets must match. If you plan to run multiple formats, list them all so the mould quotation covers every cavity layout from day one.

Frequently Asked Questions

Q: How is daily output calculated for the QTJ4-24, and which block format is assumed?
A: The 24–26 second cycle is measured on a 400×200×200mm hollow block at four pieces per mould. Daily output depends on your shift length, the actual block format you run, and how quickly pallets move to the curing area. Request a capacity sheet that restates the cycle for every format you plan to produce.

Q: Where does the QTJ4-24 sit within the full Shiyue machine range?
A: It is the entry semi-automatic tier, suited to first-plant buyers or contractors producing on-site. Buyers needing higher volume or automatic stacking should look at the next tier up, which shares the same pallet ecosystem but adds PLC-controlled pallet handling.

Q: What plant footprint and investment level should a first-plant buyer plan for?
A: The press itself is 3600×1700mm plus space for a mixer, conveyor, and curing racks sized for 900×450mm pallets. Total area depends on curing time and stockpile needs. Request a line layout drawing that maps every station before committing floor space.

Q: Can the QTJ4-24 be upgraded to higher automation later?
A: Yes. The mechanical and manual combined operation can be supplemented with automatic pallet feeding and stacking stations within the Shiyue system, so the press itself does not need replacing when you move to a higher automation level.

Q: What voltage, frequency, and control language options are confirmed before shipment?
A: Voltage, frequency, and control-panel display language are confirmed in writing before the wiring harness is cut. This prevents the motor mismatch and language-barrier delays that have stalled other shipments when assumptions were left unverified.