Matched line cycle times — The QTJ4-24 is supplied as a complete loop with mixer, conveyor and pallet handling specified together so no station becomes a bottleneck.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QTJ4-24 |
| Product Type | Semi-Automatic Concrete Block Making Machine |
| Molding Method | Platform Vibration |
| Overall Dimensions (L×W×H) | 3600 mm × 1700 mm × 2560 mm (working state) |
| Total Mass | 1750 kg |
| Overall Power | 14.25 kW |
| Pallet Size | 850 mm × 450 mm |
| Mould Format (Hollow) | 390 mm × 190 mm × 190 mm (4 pcs/mould) |
| Mould Format (Solid) | 240 mm × 115 mm × 53 mm (21 pcs/mould) |
| Vibration System | Lower platform (2 × 3 kW) + Upper (1.5 kW attached vibrator) |
| Elevating System | Cone-shape motor with JZQ250 speed reducer, V-belt drive |
| Delivery Device | Cycloidal pin wheel speed reducer, chain and V-belt drive |
| Frame Construction | Dragon gate style, super steel, four wear-resisting vertical guide shafts |
| Automation Level | Semi-automatic (mechanical and electronic combination) |
| Line Equipment | JQ350 pan mixer, 6 m belt conveyor, optional auto stacker (3–6 layers) |
| Voltage & Frequency | Configurable to site supply (basis to be confirmed) |
| Cycle Time | Dependent on block format and mix design (basis to be confirmed) |
| Daily Output | Dependent on block format and shift length (basis to be confirmed) |
| Hydraulic System | Not applicable (mechanical vibration type) |
| Assembly State | Stationary, requires fixed foundation |
Application Suitability
| Application | Material or Output |
|---|---|
| Small-scale hollow block plants | Crushed stone, sand and cement for 390×190×190 mm hollow blocks |
| Standard solid brick production | Local aggregate and cement for 240×115×53 mm solid bricks |
| On-site contractor production | Housing and development project materials produced at the construction location |
| First-time block plant setup | Lower initial investment entry into building material supply |
| Distributor format expansion | Compact stationary line for building material merchants adding block supply |
What "Standalone Press" Quotations Leave Out of Your Daily Throughput
A press without matched upstream and downstream equipment spends most of the shift waiting, not pressing.
I have walked onto sites where the block press was the newest machine in the yard, yet the daily pallet count told a different story. The mixer was undersized, the belt conveyor dropped material too slowly, and workers were hand-carrying pallets from the curing area. The semi-automatic block machine production line only delivers its rated output when every station before and after the press runs at a compatible cycle [NEED_CITE: block production line cycle time matching principles]. When one station lags, the entire daily volume collapses to the pace of the slowest link.
How the Material Feed Loop Keeps the Press Running
The JQ350 pan mixer and 6 m belt conveyor are sized so that a fresh batch reaches the press hopper before the previous cycle empties it. When the mixer output and conveyor speed fall below the press consumption rate, the operator stands idle and the vibration cycle starts late. Matching these three stations means the QTJ4-24 receives a consistent volume of mixed concrete at every stroke, keeping block density uniform across the shift. A semi-automatic block machine production line lives or dies by this upstream timing.
Closing the Loop from Press to Curing Yard
The optional auto stacker handles three to six layers per pallet, moving finished blocks off the delivery table without manual lifting. Without it, workers carry wet pallets one by one to the curing rack, and the press pauses every time the stacker table fills up. Adding the stacker keeps the delivery table clear so the next mould cycle can eject immediately. This downstream closure is where many quoted lines silently lose throughput, because the quotation stopped at the press [NEED_CITE: downstream pallet handling in block production].
Reading the Specs That Actually Shape Your Output
The dual 3 kW lower vibration motors combined with the 1.5 kW upper attached vibrator create compaction from both faces of the block. This dual-direction force is what determines whether a hollow block reaches the compressive strength your local building code requires, not the motor power alone. The dragon gate frame with four wear-resisting vertical guide shafts holds the mould in precise alignment through thousands of cycles, preventing the uneven wall thickness that causes breakage during pallet transport. The 850×450 mm pallet size must match the spacing of your curing racks and the fork dimensions of your existing forklift, otherwise pallets pile up on the floor and curing capacity becomes the real bottleneck. Semi-automatic block machine production line capacity depends on this full physical match, not just the press spec sheet.
The Hidden Cost of Skipping Line Integration
Buying the press alone and sourcing the mixer, conveyor and pallet handling separately often means each supplier assumes the other is handling timing and interface. The belt conveyor drops material at a height that splashes out of the hopper. The pallet feeder delivers boards at an angle that jams the press table. The curing yard layout does not match the pallet dimensions, so half the racks sit unused. These mismatches surface only during the first week of production, when rework and downtime have already consumed the budget savings [NEED_CITE: equipment integration challenges in block plants].
Why Sourcing the Full Loop from One Supplier Matters
Every component in this semi-automatic block machine production line is specified against the same cycle time target, so the mixer batch size, conveyor speed, press stroke and stacker rhythm all align from day one. The mould is designed for the block formats your local market actually buys, not just the standard hollow block in the catalogue. Configuration starts from your mix design and local aggregate, meaning vibration force and compaction time are set for the material you can actually source. Pallet size and material are chosen around your existing curing area and handling equipment. Installation includes line-wide commissioning so every station is tested together before operators take over.
Documentation & Verification
- Line layout drawing showing station spacing and material flow direction
- Capacity calculation sheet stating the block format behind each output figure
- Mould drawing and format list covering hollow and solid brick options
- Electrical schematic with confirmed voltage and control language
- Factory test record run on your target block format before dispatch
- Packing photographs and customs documentation support
Installation, Commissioning & Support
- Fixed concrete foundation required to absorb 14.25 kW vibration load
- Power supply confirmed to site voltage and frequency before wiring begins
- Machine arrives as a stationary unit requiring on-site assembly of frame and hopper
- First-run commissioning covers mixer batch timing against press cycle
- Operator training on mould change procedure and guide shaft lubrication
- Wear parts list covering guide shafts, vibration motor mounts and belt drives
Starting Your Line Specification
Tell us which block formats sell in your market and what daily volume you need to hit. Share your local aggregate type so we can match the vibration settings to your mix. Confirm your site voltage, frequency and the pallet handling equipment you already have in the curing yard, and we will size the complete loop accordingly.
Frequently Asked Questions
Q: How is daily output calculated for this line, and which block format does it assume?
A: Daily output figures must state the exact block format, mould cavity count and shift hours they are based on. A hollow block at 390×190×190 mm produces four pieces per mould, while a standard solid brick produces twenty-one. We provide a capacity calculation sheet that breaks down throughput per format so you can plan against realistic numbers.
Q: How do the mixer, conveyor and press cycle times stay matched?
A: The JQ350 pan mixer batch volume and the 6 m belt conveyor speed are selected so that a fresh batch reaches the press hopper before the previous cycle completes. This prevents the press from idling between strokes and keeps block density consistent throughout the shift.
Q: Is the auto stacker part of the standard line configuration?
A: The auto stacker is an optional station that handles three to six layers per pallet. It removes wet pallets from the delivery table automatically so the next mould cycle can eject without waiting. Whether you need it depends on your labour availability and curing yard distance from the press.
Q: What pallet size does the line use, and does it fit existing curing setups?
A: The line runs on 850×450 mm pallets. Before we confirm the specification, we check your curing rack spacing and forklift fork width so pallets move smoothly from the stacker into the curing yard without manual repositioning or rack modifications.
