Matched Line Timing — Mixer, conveyor and press configured as a connected system so cycle times align and the QTJ4-24 is never left waiting for material between moulding cycles.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QTJ4-24 |
| Product Type | Semi-Automatic Concrete Block Making Machine |
| Molding Type | Platform Vibration |
| Overall Dimensions (L×W×H) | 3600mm × 1700mm × 2560mm (working state) |
| Total Mass | 1750kgs |
| Pallet Size | 850mm × 450mm |
| Overall Power | 14.25KW |
| Mould Format | 390mm × 190mm × 190mm (4 pcs/mold); 240mm × 115mm × 53mm (21 pcs/mold) |
| Vibration System | Lower platform vibration (2 × 3kW motors); Upper vibration (1.5kW attached device) |
| Elevating System | Cone-shape motor with JZQ250 speed reducer, V-shape triangle belt drive |
| Delivery Device | Cycloidal pin wheel speed reducer, chains, V-shape triangle belt |
| Machine Frame | Dragon gate style, super steel construction, four vertical wear-resisting shafts |
| Material Storage | Top-mounted material releasing hopper and lower material storing hopper |
| Automation Level | Semi-automatic (mechanical and electronic combination) |
| Control System | Electronic controlling part |
| Stacking Method | Manual (optional auto stacker available, 3–6 layers depending on block height) |
| Basic Line Configuration | QTJ4-24 press + JQ350 pan mixer + 6m belt conveyor |
| Voltage & Frequency | Not stated in source — confirm before order |
| Cycle Time | Not stated in source — confirm block format |
| Output Capacity | Not stated in source — confirm block format and mix design |
Application Suitability
| Application | Material or Output |
|---|---|
| Small-scale hollow block production | Crushed stone, cement, sand, fly ash aggregates |
| Solid brick manufacturing | Concrete mix, quarry dust, gravel blends |
| On-site contractor block production | Locally sourced aggregate and cement |
| Entry-level plant setup for entrepreneurs | Standard concrete block mix designs |
| Paving block or interlocking brick trials | Pigmented concrete with fine aggregate (mould dependent) |
What "Line Capacity" Means When Upstream Stations Can’t Keep Up
A press rated for a certain cycle time is only as fast as the slowest station feeding or clearing it.
I worked on line layouts in Shandong for years, and the most common call I got after commissioning was not about the press itself — it was about the mixer or the belt conveyor falling behind. A semi-automatic concrete block making machine production line only delivers its stated output when the JQ350 pan mixer batch cycle, the 6m belt conveyor feed rate, and the press moulding cycle are calculated together. Too often, each station is quoted by a different supplier with no one checking the handshake points [NEED_CITE: industrial line integration practices for concrete block plants]. When the mixer takes longer to discharge than the press needs to complete a cycle, the operator stands idle and the daily count drops.
Matching Mixer Output to Press Demand
The JQ350 pan mixer paired with this line has a batch capacity that must be reconciled with the number of cycles the QTJ4-24 completes per shift. If the mixer discharges one batch every few minutes and the press consumes material faster, the conveyor runs empty between batches. We calculate the mixer discharge interval against the press cycle time for each block format the buyer intends to run, so neither station bottlenecks the other. This is where a semi-automatic concrete block making machine production line either earns its keep or disappoints on day one.
Conveyor Feed Rate and the Hopper Handshake
The 6m belt conveyor moves mixed material from the JQ350 discharge point to the top-mounted releasing hopper on the QTJ4-24. The conveyor speed and belt width must deliver enough volume per minute to refill the storing hopper before the next moulding cycle begins. If the belt runs too slowly, the hopper level drops and the operator must pause the press. We specify the conveyor drive and belt profile against the mix density and moisture content the buyer will actually use, because a wetter mix behaves differently on an inclined belt than a dry zero-slump blend [NEED_CITE: belt conveyor selection criteria for concrete batching].
Clearing the Press End: Pallet Handling and Stacking
Material flows into the press, but moulded blocks must flow out just as reliably. Manual pallet handling means an operator physically removes each loaded pallet and stacks it on the curing rack. For a small workshop this is manageable, but as shift length increases, fatigue slows the pace and the press waits. The optional auto stacker handles 3 to 6 layers depending on block height, keeping the exit end moving at a consistent rate. We include the stacker and trolley in the line layout drawing so the buyer sees the complete material path before committing.
Reading the Specs That Actually Matter
The QTJ4-24 uses platform vibration driven by two 3kW lower motors and a 1.5kW upper vibration device. The dual lower motors generate the primary compaction force through the pallet, while the upper device settles the top face of the block. This combination matters because hollow blocks need strong vertical compaction to form clean webs, whereas solid bricks benefit from the upper assist to produce a flat, uniform surface. The dragon gate frame with four vertical wear-resisting shafts keeps the mould aligned through thousands of vibration cycles per shift, preventing the tapered wear that causes blocks to stick in the mould or emerge with uneven walls. The 850mm × 450mm pallet size determines both the block layout per cycle and the curing rack dimensions the buyer must prepare on site.
When Stations Are Specified in Isolation
A buyer who sources the press, mixer and conveyor from three separate suppliers often discovers timing mismatches at commissioning. The mixer motor may be undersized for the mix stiffness the press requires, producing incomplete batches. The conveyor may lack a scraper belt cleaner, letting residual material build up and reducing effective feed volume. These problems do not show up on a spec sheet — they appear on the first production day when the semi-automatic concrete block making machine production line runs below expectation and no single supplier accepts responsibility for the gap [NEED_CITE: multi-supplier line integration risks in block manufacturing].
Why a Connected Line Specification Changes the Outcome
Every station on this line is specified against the others, not against a catalogue default. The JQ350 pan mixer capacity, the 6m belt conveyor throughput and the QTJ4-24 cycle sequence are documented together in the line layout drawing with capacity calculations stated per block format. The pallet size of 850mm × 450mm is confirmed against the buyer’s existing curing racks and forklift before production begins. Voltage, frequency and control language are locked in on a confirmation sheet so the line arrives ready for the local electrical supply. Moulds are selected for the block formats the buyer’s market actually sells, and custom mould drawings are available when a non-standard format is required. The optional auto stacker, trolley and block clamper are positioned in the layout so the buyer knows the full plant footprint and labour requirement before ordering. Factory test records cover vibration force, cycle time per mould format and output per shift so there are no surprises at commissioning.
Documentation & Verification
- Line layout drawing showing JQ350 mixer, 6m conveyor and QTJ4-24 press positions with pallet flow direction
- Capacity calculation sheet stating cycle time and output per block format, not a single generic figure
- Pallet specification confirming 850mm × 450mm dimensions and material against buyer’s curing rack and forklift
- Voltage, frequency and control language confirmation sheet signed before production starts
- Factory test record covering vibration force, cycle time and output for each mould format shipped
- Mould drawing and format list showing all block dimensions included in the order
Installation, Commissioning & Support
- Foundation pad sized to the 3600mm × 1700mm working footprint with anchor bolt template provided
- Dedicated electrical circuit for the 14.25KW total load with voltage and frequency confirmed to site supply
- Press arrives with dragon gate frame assembled; mixer and conveyor bolt together on site with supplied hardware
- First-run commissioning includes cycle time verification for each mould format loaded on the press
- Operator training covers mixer batching sequence, conveyor start-up order and press cycle initiation
- Wear parts list includes vibration motor mounts, shaft bushings and belt scraper replacements
What to Include in Your Inquiry
To configure a line that actually matches your site, tell us the block formats your market sells, the daily output you need per format, and the aggregate materials available locally. Include your site voltage and frequency, the curing area dimensions you have planned, and whether you already own a forklift or plan to handle pallets manually. If you have an existing mixer or conveyor, share the model and capacity so we can confirm whether it fits the line timing or needs replacing.
Frequently Asked Questions
Q: How are the mixer, conveyor and press matched so the press is not left waiting between cycles?
A: We calculate the JQ350 pan mixer batch discharge interval against the QTJ4-24 cycle time for each block format, then specify the 6m belt conveyor speed to refill the hopper before the next cycle begins. The three stations are documented together in the line layout so timing is verified before shipment.
Q: Which block format is the output capacity based on?
A: Output capacity varies by mould format. We state cycle time and realistic daily output separately for 390×190×190mm hollow blocks and 240×115×53mm solid bricks based on the buyer’s confirmed mix design, rather than quoting a single figure that assumes one format only.
Q: Is the auto stacker included in the line quotation?
A: The basic line quotation covers the QTJ4-24 press, JQ350 pan mixer and 6m belt conveyor with manual pallet handling. The auto stacker handling 3 to 6 layers depending on block height is an optional addition quoted with the line so the buyer sees the complete configuration upfront.
Q: What voltage, frequency and control language will the line ship with?
A: These are confirmed on a dedicated sheet before production begins. We record the buyer’s site voltage, frequency and preferred control display language so the electrical system and electronic controlling part arrive configured for local commissioning without delays.
Q: What pallet size does the line use, and is it compatible with my curing setup?
A: The line uses 850mm × 450mm pallets. We confirm pallet material and dimensions against the buyer’s planned curing rack spacing and forklift fork width before finalising the quotation, so pallets move from press to curing area without compatibility issues.
