Matched Line Configuration — every station from the JQ350 mixer through the 26-second press cycle to pallet egress is timed as one system, so the QTJ4-26 never idles waiting for material or boards.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QTJ4-26 |
| Product Type | Semi-Automatic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 2060×1730×2580 mm |
| Molding Cycle | 26 s |
| Vibration Frequency | 4200 r/min |
| Exciting Force | 35.5 kN |
| Rated Power | 14.25 kW |
| Mixer Model | JQ350 |
| Pallet Size | 850×450×20 mm |
| Net Weight | 1800 kg |
| Guide System | Four guide pillars |
| Mould Movement | Automatic |
| Vibration Type | Dual under-mould vibrating motors with upper mould pressing |
| Applied Products | Concrete hollow blocks (8 inch, 6 inch), solid bricks |
| Output — Hollow Block 390×190×190 mm | 4 pcs/mould, 480 pcs/h, 3800 pcs/8 hr |
| Output — Hollow Block 400×150×200 mm | 5 pcs/mould, 600 pcs/h, 4800 pcs/8 hr |
| Output — Solid Brick 240×115×53 mm | 18 pcs/mould, 2100 pcs/h, 17000 pcs/8 hr |
| Voltage & Frequency | Configurable to buyer site (basis to be confirmed) |
| Control System | Configurable — confirm PLC, relay, or manual panel |
| Certification | To be confirmed with buyer |
Application Suitability
| Application | Material or Output |
|---|---|
| Small-to-medium block plant | Hollow blocks and solid bricks from crushed stone, sand, cement, fly ash |
| On-site construction production | 8 inch and 6 inch hollow blocks for housing project walls |
| Entrepreneur first-line setup | Solid brick 240×115×53 mm and hollow block formats from local aggregate |
| Existing plant format expansion | Additional mould formats integrated with current pallet rack and forklift fleet |
Why the Pallet Question Must Come Before the Press
A block press quoted at 2100 solid bricks per hour means nothing when pallets are still being moved by hand.
I spent years walking factory floors across Europe and North America with my mentor, learning that the real bottleneck on a concrete block production line QTJ4-26 setup is rarely the press itself — it is everything around it. Buyers fixate on cycle time and ignore how wet blocks leave the machine, where they cure, and what forklift picks them up. The result is a press that runs at full speed for thirty seconds, then waits while someone scrambles for the next pallet [NEED_CITE: common causes of block line downtime in small plants]. Quoted capacity and actual daily output drift apart, and the buyer blames the machine when the problem was the line layout.
Mixer-to-Press Feed Timing
The JQ350 mixer paired with this block making machine with supporting equipment must discharge a full batch within the 26-second moulding window. When mixer capacity undershoots the press appetite, the vibration table sits idle and hourly output drops below the rated figure. We confirm batch weight against the buyer’s mix design — aggregate density, moisture content, cement ratio — before finalising the mixer drum size and discharge gate speed.
Pallet Circulation and Curing Area Match
The 850×450×20 mm pallet dimension governs more than the press bed. It dictates curing rack slot spacing, forklift fork width, and the turning radius needed between the block egress point and the drying yard. A plant owner who has already invested in racking built for a different pallet size faces either costly rack modification or a daily handling penalty. We cross-check the buyer’s existing pallet inventory and rack drawings before locking the pallet specification [NEED_CITE: pallet size compatibility with curing infrastructure].
Reading the Specs That Actually Matter
Vibration frequency at 4200 r/min and an exciting force of 35.5 kN work together with upper mould pressure to compact the concrete mix. Higher force on a dry, low-slump mix with coarse crushed stone produces dense hollow blocks that survive transport without corner damage. The same force on a wetter fly-ash-heavy mix can cause mould sticking and surface tearing. The four guide pillar system keeps upper and lower mould halves aligned across thousands of cycles, which matters most when switching between the 390×190×190 mm and 400×150×200 mm hollow block formats — misalignment wears mould edges unevenly and shortens mould life. Automatic mould movement reduces format changeover from a full-shift exercise to a task measured in minutes, protecting the format flexibility the buyer paid for.
The Cost of Skipping Line Integration
When the upstream feeder, press, and downstream pallet handling are sourced from separate suppliers, no single party owns the cycle-time mismatch. The mixer vendor says their unit meets spec; the press vendor points to the cycle rate on paper; the buyer is left hand-stacking blocks while the line runs at half capacity. Gaps like these surface only after commissioning, when the plant is already behind schedule and the contractor is demanding delivery [NEED_CITE: integration failures in multi-vendor block lines]. Rectifying station timing after installation costs more than specifying the line as one system from the start.
Why Source the Full Line Here
Block machinery is our single focus, so the QTJ4-26 press, JQ350 mixer, pallets, and handling equipment are specified as one matched set rather than assembled from separate catalogues. We configure the vibration force and hydraulic pressure against the buyer’s actual aggregate and mix design, not a default setting. Mould formats are selected for the products the buyer’s market actually sells, with custom drawings available. The automation level is selectable — a buyer can begin with semi-automatic pallet handling and add automatic stacking later. Installation support includes operator training so the crew understands every station, not just the press.
Documentation & Verification
- Line layout drawing with station spacing and cycle time at each node for the QTJ4-26
- Capacity calculation sheet stating the block format assumed for every output figure
- Pallet specification sheet with material, thickness, and load rating matched to your racks
- Factory test record run on your specified block format before dispatch
- Voltage, frequency, and control language confirmation document signed before production
Installation, Commissioning & Support
- Foundation pad sized to the 2060×1730 mm footprint with anchor bolt template provided
- Dedicated power circuit rated for 14.25 kW plus mixer draw, voltage confirmed pre-production
- Machine shipped in dismantled state with reassembly sequence documented for site crew
- First-run commissioning covers mould alignment, vibration tuning, and cycle timing verification
- Operator training on format changeover using the automatic mould movement and four-pillar guide
- Wear parts list covering mould liners, vibration motor bearings, and hydraulic seals
Before You Request a Quote
Tell us which block formats your market sells and the daily volume you need to hit. Share your local aggregate type — crushed stone grading, sand source, whether fly ash is available — so we can match vibration force to your mix. Confirm the voltage and frequency at your site, the language your operators read, and whether you already have curing racks and forklifts that the 850×450 mm pallet must fit.
Frequently Asked Questions
Q: How is the 480 to 2100 pieces per hour capacity verified for the QTJ4-26?
A: Each capacity figure assumes a specific block format and the 26-second moulding cycle. The 480 pcs/h rate applies to 390×190×190 mm hollow blocks at 4 pieces per mould, while 2100 pcs/h applies to 240×115×53 mm solid bricks at 18 pieces per mould. These rates assume continuous pallet feed and mixer discharge timed to the press cycle without manual delays.
Q: Does the JQ350 mixer keep up with the QTJ4-26 press cycle?
A: The JQ350 drum volume and discharge gate are matched to the batch weight needed per 26-second press cycle. We confirm this against the buyer’s mix density and moisture content before finalising the line. If the buyer’s aggregate is unusually heavy, we verify batch timing during the factory test so the press does not idle between batches.
Q: What pallet handling and curing equipment is included in the quotation?
A: The quotation covers the press, mixer, pallets, and the handling stations specified during layout planning. Stacking, curing rack systems, and forklift equipment are scoped based on the buyer’s existing infrastructure. We clarify what is included and what the buyer sources locally before the order is confirmed.
Q: How should the 850×450×20 mm pallet fit my existing curing setup?
A: We ask for the buyer’s curing rack slot width and forklift fork dimensions before production. The pallet must slide into rack slots with clearance for air circulation and be liftable when loaded with wet blocks. Mismatches are corrected on paper, not after the pallets arrive at the plant.
