Line-First Configuration — we match the QTJ4-24 cycle to upstream mixing and downstream pallet return so the press never idles waiting on ancillary stations.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Automatic Hydraulic Cement Hollow Block Making Machine |
| Model | QTJ4-24 |
| Overall Dimensions (L×W×H) | 3600 × 1700 × 2560 mm |
| Pallet Size | 850 × 450 mm |
| Molding Cycle | 24–26 s |
| Overall Power | 11.95 kW |
| Vibration Force | 45 kN |
| Vibration Configuration | 2 × 3 kW lower + 2 × 1.5 kW upper vibrators |
| Reducer for Mold Lifting | 350-type |
| Material Distribution | Full-automatic spiral |
| Total Mass | 2 T |
| Molding Method | Mechanical (title references hydraulic; verify forming method) |
| Control System | PLC (brand and language options to be confirmed) |
| Voltage & Frequency | To be confirmed before commissioning |
| Output Capacity | (basis not stated in source — confirm block format, material, thickness) |
| Warranty | 1 year for the whole machine (excluding spare parts) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production | Cement, sand, crushed stone |
| Solid block production | Cement, sand, stone aggregate |
| Interlocking brick production | Cement, sand, fine stone |
| Paving brick production | Cement, sand, stone with surface finish |
Why the Pallet Return Speed Can Stall the Entire Block Production Line Equipment
A 24–26 s press cycle means the pallet must be back in position before the next mold drop, or every subsequent cycle slips.
When a plant owner focuses only on the press itself, the pallet circulation loop often becomes the hidden bottleneck. The 850 × 450 mm pallets must travel from the press to the curing rack, offload, and return — and if that loop takes longer than the molding cycle, the QTJ4-24 sits idle [NEED_CITE: pallet circulation bottleneck in stationary block plants]. I have walked into workshops where the press was rated for steady output, but the operator was hand-carrying pallets to a curing yard fifty meters away. The block production line equipment around the press must close that loop.
Synchronizing the Mixer Batch with a 24–26 s Molding Cycle
The full-automatic spiral material distribution on the QTJ4-24 feeds the mold box uniformly, which keeps density consistent from one cycle to the next. But that feed system only works if the mixer discharges a fresh batch before the spiral runs empty. A mixer that takes forty seconds to discharge into the hopper will starve the press on every other cycle, and the block production line equipment upstream must be sized so batch volume and discharge time match the press appetite.
Pallet Specification Must Match the Curing Yard, Not Just the Press
The 850 × 450 mm pallet size is fixed by the machine frame, but the pallet material, thickness, and weight must align with the curing rack spacing and the forklift or hand trolley already on site. If a buyer sources bamboo pallets locally but the rack was built for steel pallets, the offload station jams [NEED_CITE: pallet material and rack compatibility in block curing]. Supporting equipment for block press configurations must account for the full pallet journey, not just the molding station.
Reading the Vibration and Lifting Specs for Line Reliability
The 45 kN total vibration force comes from four motors — two 3 kW units below and two 1.5 kW units above — which compacts the cement-sand-stone mix from both directions. This dual-axis vibration matters when the local aggregate is coarse or poorly graded, because upper vibration settles fines into the surface while lower vibration densifies the body. The 350-type reducer on the mold lifting station is a mechanical component that sees continuous load reversal every 24–26 seconds; its service life directly affects how often the line stops for unplanned maintenance. Overall power at 11.95 kW means the electrical supply must be confirmed for voltage and frequency before the supporting equipment for block press stations — mixer motors, conveyor drives, stacker hydraulics — are wired to the same panel.
When the Quotation Stops at the Press Door
Leaving pallet handling, stacking, and curing out of the scope means the buyer inherits manual labor that the press cycle was never designed to support. An operator carrying wet blocks by hand introduces variable timing that the PLC cannot compensate for, and the daily output drifts below what the molding cycle alone would suggest [NEED_CITE: manual pallet handling impact on block plant daily output]. The block production line equipment quotation must list every station between the raw material hopper and the cured product rack, so nothing falls to the buyer as a surprise.
What We Build into the Line Around This Press
Configuration starts from the buyer’s actual mix design and local aggregate, not a catalog default — vibration force and spiral feed rate are set to match. The QTJ4-24 and its supporting equipment for block press stations are specified as one matched system, so cycle times align from mixer to stacker. Mould design covers the formats the buyer’s market sells, with custom drawings available for non-standard shapes. Automation level is selectable: a buyer can begin with manual pallet handling and add automatic stacking later without replacing the press. Installation includes on-site commissioning and operator training on the full line sequence, not just the press controls.
Documentation & Verification
- Line layout and capacity calculation stating the block format and mix assumed
- Machine specification sheet with pallet size and vibration motor ratings
- Hydraulic and electrical schematic showing PLC integration points
- Voltage, frequency, and control language confirmation before production
- Factory test record on the buyer’s target block format
- Pallet specification matched to curing rack and forklift dimensions
Installation, Commissioning & Support
- Foundation pad sized to 3600 × 1700 mm footprint with vibration isolation
- Dedicated electrical circuit rated for 11.95 kW plus all upstream and downstream station loads
- Voltage and frequency verified against site supply before the PLC is powered on
- First-run cycle timing adjusted to match the actual mixer discharge speed and pallet return loop
- Operator training covering PLC sequencing, mold change procedure, and 350-type reducer inspection
- Wear parts list for vibration motors, spiral feed components, and mold surfaces
What We Need to Size Your Line Correctly
Send the block formats your market sells, the daily output target tied to each format, and the raw material sources available locally. Include your existing curing yard dimensions, forklift model, and the voltage and frequency at the site so we can confirm the PLC and all supporting equipment for block press stations before production starts.
Frequently Asked Questions
Q: How is the daily output of the QTJ4-24 calculated in a full line?
A: Output depends on the specific block format, mix design, and whether pallet circulation keeps pace with the 24–26 s molding cycle. We provide a capacity calculation that names the block format and states every assumption, so you can verify the figure against your production target before the line is built.
Q: What happens if the mixer discharge is slower than the press cycle?
A: The press waits for material, and each idle gap compounds across a shift. The mixer batch size and discharge time must be matched to the spiral feed rate so the QTJ4-24 never starves. We specify the mixer as part of the line, not as an afterthought.
Q: Why must voltage be confirmed before production starts?
A: The PLC, vibration motors, and all supporting equipment for block press stations are wired for a specific voltage and frequency. A mismatch delays commissioning and can damage motors. We confirm your site supply before any electrical component is ordered.
Q: Can the automation level be upgraded later?
A: The QTJ4-24 PLC provides integration points for automatic pallet feeding, stacking, and cubing. A buyer can start with manual pallet handling and add automated stations when volume justifies the investment, without replacing the press itself.
Q: What does on-site commissioning cover beyond the press?
A: Our team sets cycle timing across the entire block production line equipment sequence — mixer discharge, spiral feed, mold drop, pallet return — and trains operators on PLC controls, mold change, and daily inspection of the 350-type reducer and vibration motors.
