Line-Centered Design — the QTJ4-25 block press is quoted with mixer, conveyor and pallet stations specified as one system, so no station becomes the bottleneck once production starts.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Semi-Automatic Hollow Block Making Machine |
| Model | QTJ4-25 |
| Overall Dimensions (L×W×H) | 3060×1730×2580 mm |
| Total Weight | 4 T |
| Vibration Force | 45 KN |
| Cycle Time | 25 s |
| Pallet Size | 850×550 mm |
| Block Height Range | 40–280 mm |
| Mixer Model | JQ500 |
| Belt Conveyor Length | 8 m |
| Workshop Area Required | 50–150 m² |
| Material Storage Area Required | 300–500 m² |
| Motor Brand | Germany SIEMENS or ABB |
| Control System | Electric control |
| Voltage & Frequency | 380V, 3-phase, 50Hz (customizable to local voltage) |
| Output Capacity | 480 pcs/h for 400×200×200mm hollow block; 600 pcs/h for 400×150×200mm; 840 pcs/h for 400×100×200mm; 2880 pcs/h for 240×115×53mm solid brick |
| Mould Compatibility | Hollow block, solid block, paver, interlocking block, curbstone, grassed brick, revetment brick, colored paver; custom mould design available |
| Automation Level | Semi-automatic |
| Stacking Method | Manual |
| Warranty | 1 year (excluding wearing parts) |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for small to medium plants | Fly ash, cement, crushed stone and sand mix |
| Solid brick production | Cement and fine aggregate blend |
| Paving block and interlocking paver production | Cement, sand and gravel with pigment option |
| Curbstone and kerbstone forming | High-cement mix with coarse aggregate |
| On-site block production for housing projects | Locally sourced aggregate and cement |
What a "Semi-Automatic Block Making Machine Production Line" Actually Includes
The quotation must list every station from mixer to stacking, or the missing piece becomes your cost on day one.
I once watched an Indonesian project stall for two weeks because the buyer assumed pallet feeding was part of the press package — it was not, and the local fabricator took three weeks to build a rack that still jammed every third cycle. When sourcing a semi-automatic block making machine production line, the conversation has to cover mixer capacity, conveyor length, pallet material and curing space before anyone talks price. Leaving one station off the scope list does not save money; it simply moves the expense to the site where options are fewer and lead times longer [NEED_CITE: common scope gaps in semi-automatic block line quotations].
Matching Mixer Output to Press Cycle Time
The JQ500 mixer paired with an 8 m belt conveyor is sized around the 25 s cycle of the QTJ4-25. A smaller mixer would force the press to idle between batches, and a longer conveyor adds material travel time that desynchronizes the feed. In a semi-automatic block making machine production line, the slowest station sets the pace — when the mixer and conveyor are matched to the press, the operator loads raw material on a rhythm that keeps the hopper full without overflow.
Pallet Specification Before the Workshop Floor Is Poured
Pallet size at 850×550 mm is not a universal standard; it dictates the curing rack slot width and the forklift tine spacing the buyer already owns or plans to buy. Specifying pallet material — bamboo, steel or PVC — against the local humidity and curing method prevents warping that causes uneven block height. I have seen plants in coastal Vietnam replace an entire pallet set within a year because the original bamboo stock absorbed moisture and swelled beyond tolerance [NEED_CITE: pallet material durability in high-humidity curing environments].
Reading the Numbers Behind the Output
The vibration force of 45 KN works together with the hydraulic system to compact the mix; higher vibration without sufficient pressure produces blocks that crumble at the edges, while pressure without vibration leaves air pockets in the core. The 40–280 mm block height range covers most hollow and solid formats, but switching to the upper end means longer fill time and a slightly extended cycle. Motor choice between SIEMENS and ABB affects spare-part availability in the buyer’s region — a nameplate that local rewind shops do not recognize turns a simple bearing swap into a multi-week import. The required workshop area of 50–150 m² and material storage of 300–500 m² should be measured against the site before the foundation is poured, not after the press arrives and the curing racks have nowhere to go.
When Line Stations Fall Out of Sync
A mixer that empties faster than the press can consume leaves material sitting in the conveyor trough, where it begins to set and clogs the belt. A curing rack built to the wrong pallet dimension forces workers to stack blocks by hand on the floor, turning a semi-automatic operation back into a manual one. These mismatches rarely show up in the factory test because the test runs each machine alone; the problem appears only when the whole semi-automatic block making machine production line runs together for a full shift [NEED_CITE: line integration issues during on-site commissioning].
Why Source the Full Line from One Supplier
Block machinery is the single product focus, so the QTJ4-25, its mould, pallet and handling equipment leave the factory as a matched set rather than an assembly from separate vendors. Configuration is built around the buyer’s actual mix design and local aggregate, not a catalogue default. Mould drawings cover the formats the buyer’s market moves, and custom profiles are drafted before production starts. The automation level starts at semi-automatic and can be upgraded to automatic stacking and cubing later without replacing the press. Installation support includes operator training on the full line, not just the press, so cycle timing and pallet handling are practiced before the first production day.
Documentation & Verification
- Line layout showing mixer, conveyor and press station spacing
- Capacity calculation stating block format for each output figure
- Mould drawing and format list matched to buyer’s market
- Pallet specification with material and curing rack compatibility
- Voltage, frequency and control language confirmation sheet
- Factory test record on the buyer’s target block format
Installation, Commissioning & Support
- Foundation pad leveled to 3060×1730 mm press footprint plus conveyor run
- Dedicated 380V 3-phase circuit sized for SIEMENS or ABB motor starting current
- Mixer and belt conveyor assembled on-site and aligned to press hopper
- First-shift run with operator training on 25 s cycle and mould change
- Wearing parts list covering vibration springs, mould liners and pallet guides
- Daily greasing schedule for press columns and conveyor bearings
Planning Your Line Scope
Send the target block format and daily volume so the mixer batch size and conveyor speed are calculated against actual output. Provide the local voltage, frequency and the language operators will read on the control panel. Share the workshop dimensions and existing curing rack or forklift specs so pallet size and material are locked before production begins.
Frequently Asked Questions
Q: How is output capacity calculated and which block format does each figure assume?
A: Every capacity figure is tied to a specific block size — 480 pcs/h assumes a 400×200×200 mm hollow block, while 840 pcs/h assumes a 400×100×200 mm hollow block. Daily planning must use the figure that matches the format you actually sell, not the highest number on the sheet.
Q: Which line stations are included and which must the buyer supply?
A: The quotation covers the QTJ4-25 press, JQ500 mixer, 8 m belt conveyor and pallet set. Curing racks, forklift and raw material silos are buyer-supplied unless added to the scope. Confirming this split before order avoids on-site surprises.
Q: How do I confirm voltage, frequency and control language for my country before shipment?
A: A confirmation sheet listing voltage, frequency and the language on the electric control panel is signed off before production starts. Changing language or voltage after the panel is wired delays dispatch, so this step is handled during the quotation stage.
Q: What pallet size and material is specified, and does it match my existing curing racks?
A: Standard pallet size is 850×550 mm, and material options include bamboo, steel or PVC. The choice depends on local humidity and the slot width of your curing racks. Share rack and forklift dimensions early so the pallet spec is locked before the order.
Q: What is the mould change procedure and how long does a format switch take?
A: Mould change on the QTJ4-25 involves unbolting the current mould, lifting it out, setting the new one and re-aligning the vibration box. Plan for a full shift changeover the first few times; once the team has done it several cycles, the swap becomes routine.
