QTJ4-24 Semi Automatic Block Machine In Stock

Description

Stocked Configuration — Every QTJ4-24 unit leaves the factory with voltage and pallet specs locked to the buyer’s site, not a default catalogue setting.

Technical Specifications

Application Suitability

Why the Voltage Question Should Come Before the Price

A machine rated for the wrong frequency will not start — no amount of on-site adjustment fixes a 50 Hz motor on a 60 Hz supply.

I once watched a QTJ4-24 semi automatic block machine in stock sit idle on a Dubai site for three weeks because the motor was wound for 380V/50Hz and the local supply was 415V/50Hz. The protection switch tripped on the first test run. A transformer was eventually shipped in, but the contractor lost an entire foundation pour cycle waiting. The voltage and frequency must be confirmed on paper before the machine enters production, not discovered when the container is cracked open [NEED_CITE: voltage and frequency standards by export market].

What In-Stock Really Means for Dispatch

A QTJ4-24 semi automatic block machine in stock is not simply sitting in a warehouse fully assembled and ready to bolt down. The press itself is typically built and tested, but the mould set, pallets, and electrical cabinet are matched to the buyer’s confirmed order sheet. Once those final specifications are locked, the machine is dismantled into container-loading configuration — the main frame, hydraulic station, and control panel each wrapped and braced separately. The dispatch window depends on whether the requested mould format is already on the shelf or needs a production run.

Lead Time Breakdown You Will Not Find on a Brochure

The gap between "in stock" and "on your site" involves container booking, inland haulage to port, ocean transit, and destination customs clearance. For buyers working against a project deadline, the critical path is the factory test and load-out. A standard 20-foot or 40-foot container must be loaded with the frame, moulds, pallets, and any spare wear parts in a sequence that allows first-off unloading at the destination. I have seen delays happen not because the machine was missing, but because the pallet stack was loaded behind the press frame and the forklift could not reach it first [NEED_CITE: container loading sequence for heavy machinery export].

How Vibration Force and Pressure Determine Block Density

The 45 kN vibration force on this press is generated by four independent vibrators — two 3 kW units below the mould table and two 1.5 kW units above. This dual-direction setup consolidates the concrete mix from both faces simultaneously, which matters when the block wall thickness is thin and the aggregate is angular. The mechanical pressure from the mould head works with the vibration to compact the mix into the cavity. If the vibration is strong but the head pressure is weak, the block surface will be dense but the core may remain loose. The 350-type reducer driving the mould lift ensures the head descends at a controlled rate so the vibration has time to work before full pressure is applied.

The Cost of Skipping the Pallet Size Check

The 850×450 mm pallet is a common dimension, but not universal. If your existing curing racks are cut for 900×500 mm boards, the blocks will overhang or the pallet will not seat properly on the rack rails. Worse, if the forklift tines at your site are spaced for a wider pallet, the operator will struggle to move freshly pressed blocks without tipping them. I have seen small plants buy a press that fits their production volume perfectly, only to realize during commissioning that their entire curing area needs re-racking. Confirming pallet dimensions against your current handling equipment is a five-minute check that prevents a multi-week site modification [NEED_CITE: pallet handling compatibility in block plants].

Why Buy a Stocked Machine From a Dedicated Block Line Supplier

Block machinery is our single product focus, which means the QTJ4-24 is specified alongside the correct pallet material, mould cavity count, and feeder configuration as one matched set — not assembled from unrelated components. The spiral feeder is calibrated to the target mix, and the vibration frequency is set against the buyer’s local aggregate before dispatch. Moulds for hollow, solid, interlocking, and paving formats are designed in-house to fit the press table without adaptor plates. Stocked machines carry factory test records that document actual cycle performance on the specific block format the buyer ordered, not a generic test on a default mould. Spare wear parts and replacement mould inserts are catalogued by machine serial number so reorder does not require a new engineering drawing each time.

Documentation & Verification

• Factory test record documenting cycle time on your confirmed block format
• Voltage and frequency confirmation sheet signed before production starts
• Mould cavity drawing with dimensional tolerances for your block specification
• Pallet material and thickness specification matched to your curing rack system
• Hydraulic and electrical schematic with component part numbers for local sourcing
• Packing list with container load sequence for first-off unloading at site

Installation, Commissioning & Support

• Level concrete pad required, minimum 150 mm thick, sized to 4000×2500 mm for frame and feeder clearance
• Dedicated electrical circuit rated for 11.95 kW total draw with correct voltage and frequency as confirmed on order
• Machine arrives dismantled into main frame, press head, feeder, and control panel for container loading
• First-run commissioning includes vibration amplitude check, feeder spiral speed calibration, and mould alignment
• Operator training covers mould change procedure, daily vibrator inspection, and pallet feeding sequence
• Initial wear parts kit includes vibrator mounting bolts, feeder spiral tips, and mould liner inserts

What We Need Before Quoting Dispatch

Share the block format you plan to produce — hollow, solid, interlocking, or paving — along with the target wall thickness or dimensions. Confirm the local voltage and frequency at the installation site, and the control language preference for the electrical cabinet. If you already have curing racks, forklifts, or pallets on site, send the dimensions so the pallet and stacking configuration can be matched before the machine ships.

Frequently Asked Questions

Q: How is actual daily output determined for the QTJ4-24?
A: The 24–26 second molding cycle is measured under specific conditions that depend on block format, mix consistency, and curing method. Daily output must be calculated per block type — a hollow block cycle differs from a paving brick cycle. Request a capacity sheet that states the assumed format and mix before comparing numbers.

Q: What happens if the voltage at my site does not match the machine?
A: Motors wound for the wrong voltage or frequency will either trip protection devices immediately or overheat within hours. Voltage and frequency are confirmed on a signed sheet before production begins. A mismatch discovered after arrival means transformer procurement or motor rewind, both adding weeks to commissioning.

Q: What does "in stock" actually include for immediate dispatch?
A: The press frame and vibration assembly are built and tested. Moulds, pallets, and the electrical cabinet are finalized once the buyer confirms block format, pallet size, and voltage. Dispatch lead time depends on whether the requested mould is on the shelf or enters a production queue.

Q: What site conditions must be ready before the machine arrives?
A: A level concrete foundation, a dedicated power circuit at the confirmed voltage, and space for manual pallet handling and curing. The semi-automatic configuration means pallets are fed and removed by hand, so the workflow area around the press must allow forklift or hand-truck access on both sides.

Q: Which spare parts should be ordered with the first shipment?
A: Vibrator mounting hardware, spiral feeder tips, and mould liner inserts are the first wear items. A spare parts list specific to the ordered mould format is included with the machine. Ordering the initial kit with the machine avoids a production stop while waiting for international freight on a single component.