Matched System Design — the QT4-18 press, mixer, pallet circuit and stacking stations are specified together so the concrete block making machine production line runs without idle gaps between cycles.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QT4-18 |
| Product Type | Full Automatic Concrete Block Making Machine |
| Machine Power | 27.5 kW |
| Hydraulic Pressure | 20 MPa |
| Molding Cycle | 15–25 seconds |
| Main Vibration Form | Platform Vibration |
| Frame Construction | Welded thick steel rectangle section |
| Overall Dimensions (L×W×H) | 7100 × 1600 × 2610 mm |
| Machine Weight | 5800 kg |
| Control System | Full automatic PLC (language to be confirmed) |
| Voltage | Configured to buyer’s local supply (basis to be confirmed) |
| Mould Treatment | Precise line cutting, carburizing and heat treatment |
| Theoretical Output — Hollow Block 400×200×200 mm | 5,760–7,680 pcs/day at 15–20 s cycle, 4 pcs/mould |
| Theoretical Output — Porous Block 240×115×90 mm | 25,200–33,600 pcs/day at 15–20 s cycle, 14 pcs/mould |
| Theoretical Output — Standard Block 240×115×53 mm | 59,300–67,200 pcs/day at 15–17 s cycle, 28 pcs/mould |
| Pallet Size | Basis to be confirmed |
| Stacking Method | Basis to be confirmed |
Application Suitability
| Application | Material or Output |
|---|---|
| Hollow block production for load-bearing walls | Crushed stone, cement, sand aggregate mix |
| Porous block manufacturing for insulation masonry | Lightweight aggregate with cement binder |
| Standard solid block for general construction | Local sand, gravel and cement blends |
| Interlocking paver production for walkways and plazas | Fine aggregate with color-face layer option |
| Road curb stone forming for infrastructure | High-density aggregate mix with extended vibration |
| Perforated brick for partition walls | Clay-alternative aggregate with cement |
Why the Supporting Line Determines Your Real Daily Output
A press that sits idle for five seconds every cycle is a press that never reaches its nameplate capacity.
Many buyers sign off on a quotation for a concrete block making machine production line and discover at commissioning that pallet return conveyors, raw material feeding and stacking stations were never part of the deal. The press then waits for a forklift to clear finished pallets, and the 15–25 second molding cycle stretches into something far longer. Daily throughput drops, and the buyer blames the machine when the real problem is the line around it [NEED_CITE: common causes of throughput loss in block plants].
Coordinating Every Station Around the Press Cycle
The QT4-18 completes a molding cycle in 15–25 seconds, which means upstream mixing and feeding must deliver a fresh batch to the hopper within that same window. Downstream, the pallet conveyor must remove the finished block and return an empty pallet before the next press stroke begins. When any station lags, the entire concrete block making machine production line loses rhythm, and the 27.5 kW motor sits drawing power without producing.
Pallet Circulation and Curing Area Alignment
Pallet size and material must match both the press table dimensions and the curing racks already on site or planned for the new plant. If the pallets are too large for the existing forklift, every transfer requires manual intervention. If they are too heavy for the return conveyor, the motor stalls mid-cycle. Specifying pallets as part of the line — not as an afterthought — keeps the circuit closed and the press running.
Reading the Specs That Actually Matter
The 20 MPa hydraulic pressure works together with platform vibration to compact the mix into the mould cavity. Higher pressure alone does not guarantee block density; the vibration frequency must suit the aggregate particle size so that fines settle into voids before the press head applies full force. The welded thick steel rectangle frame resists the sustained vibration across double-shift operation, preventing fatigue cracks that would throw the mould alignment off by the second year. Mould tooling receives carburizing and heat treatment to withstand abrasive aggregate contact over thousands of cycles [NEED_CITE: mould wear rates in concrete block production].
The Cost of Treating the Press as a Standalone Purchase
When stacking is left to manual labour, two workers spend the entire shift moving pallets instead of monitoring mix quality. When the mixer is undersized for the press cycle, the hopper runs dry every third stroke and the vibration compacts a half-fill, producing blocks that fail the drop test. These gaps are invisible on a quotation that lists only the press, and they surface only after the container arrives and the first production run disappoints [NEED_CITE: line integration failures reported by block plant operators].
What a Coordinated Purchase Looks Like
Every station in the QT4-18 line is specified against the buyer’s actual mix design, not a catalogue default, so the mixer capacity, feeder belt speed and pallet return timing all match the press cycle. Mould formats are selected for the products the buyer’s market actually sells, with custom drawings available when standard formats fall short. Automation level is selectable — a buyer can start with semi-automatic pallet handling and add automatic stacking later without replacing the press. Installation support covers the full line footprint, not just the machine base, and operator training addresses every station so the crew knows how a mixer adjustment affects block density at the other end.
Documentation & Verification
- Line layout drawing showing station spacing and pallet circuit path for the QT4-18
- Capacity calculation sheet stating which block format each output figure assumes
- Hydraulic and electrical schematics covering every station in the line
- Factory test record run on the buyer’s confirmed mould format before dispatch
- Voltage and PLC language confirmation document signed before production begins
- Operation and maintenance manual covering press, mixer and pallet conveyor
Installation, Commissioning & Support
- Foundation plan sized to the 7100 × 1600 mm footprint with anchor bolt layout
- Power supply checklist confirming voltage, frequency and dedicated circuit for the 27.5 kW load
- Machine dismantled into press frame, hydraulic unit and control cabinet for container loading
- On-site parameter calibration using the buyer’s actual aggregate sample and mix ratio
- Operator training on PLC interface, mould change procedure and daily greasing points
- Wear parts list with mould steel grade and hydraulic seal part numbers for local sourcing
What We Need to Size Your Line
Share the block formats your market sells, the daily volume you need per format, and the aggregate available locally so we can match the mixer and vibration settings. Confirm your site voltage, frequency and the control language your operators read. Let us know the curing area dimensions and the forklift you already have so pallet size and return conveyor height fit from day one.
Frequently Asked Questions
Q: How is daily capacity calculated and which block format does each figure assume?
A: Every output number we quote states the exact block dimensions, pieces per mould and cycle time it assumes. For the QT4-18, hollow block figures are based on 400×200×200 mm at four pieces per mould and a 15–20 second cycle. Change the format and the daily total changes — we recalculate for each product on your list.
Q: Which supporting stations are included and which are buyer-supplied?
A: The quotation specifies every station from raw material feeder through mixer, pallet conveyor, press and stacking method. If you already own a mixer or curing racks that fit the cycle, we exclude them and confirm interface dimensions so nothing bottlenecks the line.
Q: How must upstream and downstream cycle times match the press?
A: The QT4-18 molds a block every 15–25 seconds, so the mixer must discharge a full batch within that window and the pallet return must deliver an empty pallet before the next stroke. We calculate each station’s timing during layout and flag any mismatch before production starts.
Q: What electrical and control details must be confirmed before the line is built?
A: We need your supply voltage, frequency, phase and the PLC display language your operators will read. These are confirmed in writing before the control cabinet is wired, avoiding rewiring costs and commissioning delays after the line arrives on site.
Q: What is the plant footprint and installation sequence?
A: The press itself measures 7100 × 1600 × 2610 mm, but the full line including mixer, feeder and pallet circuit requires additional floor space. We provide a scaled layout drawing showing every station and the recommended installation order so foundations and power drops are ready when equipment arrives.
