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Group Four

G400 BLOCK MAKING MACHINE

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Manufacturer of block making machines in Spain

Discover the G400 Block Making Machine — Quality, efficiency and cost-effectiveness

State-of-the-art synchronised vibration
A perfectly synchronised vibration system ensures uniform compaction, increasing density and strength without requiring additional cement.
Modular and adaptable design
Its reinforced, compact, and functional chassis allows for seamless integration into various plant configurations. Equipped with intuitive controls and premium components, the G400 ensures smooth, safe, and efficient operation.
Operational efficiency and cost reduction
With their robust design, energy-efficient components, and minimal maintenance requirements, they guarantee uninterrupted production and reduced waste, consistently delivering optimal quality in every block.
Intuitive operation and easy maintenance
Premium components, ergonomic control panels, front access to the vibrator assembly, and interchangeable modules. These features ensure easy adjustment and servicing, with minimal downtime and exceptional operational reliability, even in the harshest working conditions.
Durability and resistance
Designed and built using high-strength steel, this machine is ready for non-stop production in tough conditions, delivering a faster return on investment.

Production of prefabricated elements | G400 block machine

The G400 Block Making Machine stands out for its ability to optimally and efficiently produce a wide variety of precast concrete elements, achieving high precision in terms of time and a product of the highest quality and strength.

Below are some examples of products that can be manufactured with different mould configurations, including blocks, paving stones, kerbs, among many others, to meet market demands.

Product Size Number of moulded products Cycle time Hourly output (100%)
Paver 10 x 20 x 6 cm 20 15 seconds 95 square metres per hour
760 m² 8-hour shift
Hollow block 15 x 20 x 40 cm 6 18 seconds 1,250 units per hour
10.000 units, 8-hour shift

More productions from our G400 Blocker

Product Size Number of moulded products Cycle time Hourly output (100%)
Double-layer paver 10 x 20 x 6 cm 20 18 seconds 71 m²/hour
570 m² 8-hour shift
Hollow block 10 x 20 x 40 cm 10 18 seconds 1,800 units per hour
14,400 units, 8-hour shift
Hollow block 20 x 20 x 40 cm 5 18 seconds 1,000 units per hour
8,000 units, 8-hour shift
Vibration power 70 kN
Tray dimensions: 1,200 x 550 mm
Working area 1,100 x 500 mm
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Other specifications

Maximum height of the product 350 mm
Minimum height of the product 40 mm
Machine weight
* Total weight with double-layer system and mould		 11.000 kg *
Installed electrical power 23 kW
Main concrete hopper capacity 900 l
Hopper capacity of the double-layer unit 900 l

Suggested configuration diagram for the G400 Plant

The suggested configuration scheme for the G400 Plant is designed to operate the plant efficiently and productively, with a contained investment, highlighting the key equipment for its operation.
G500 block machine, layout with rack system for optimised production.
G400 MANUFACTURING MACHINE
A high-performance press that guarantees high precision and durability in medium-scale production. It uses a vibration system controlled by servomotors and a pneumatic clamping system for the mould and counter-mould.
OUTPUT CONVEYOR BELT
Continuously and efficiently convey trays with fresh products from the G400 to the next stage of the production line.
ROTATING BRUSH FOR GREEN PRODUCTS
Removes debris and burrs from newly manufactured blocks to ensure a perfect finish.
Robot device/stacker
A stacker that stacks green products with complete precision and automation. It places the trays, two at a time, in layers, one on top of the other, up to a height of 1.2 metres, allowing them to be handled with forklifts and subsequently transferred to the curing area, ensuring a continuous and efficient production flow.
CONCRETE MIXING PLANT
Efficient production of high-performance concrete. The system is adapted so that the G400 receives the mixture in perfect conditions.
Configuration diagram for maximum efficiency

This configuration diagram for the G400 Plant is designed to maximise the efficiency and productivity of your plant, offering continuous, automated production. The G400 Block Making Machine can be configured in an in-line or U-shaped layout.

Concrete plant
Rack loader and unloader
Palletiser

This layout allows you to automate almost the entire manufacturing process, requiring only the use of forklifts to load and unload the racks of fresh or cured products and move the final palletised product to the storage area.

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Do you require a different type of production? Discover our catalogue of block making machines.
G500 block-making machine for the production of precast concrete elements.
G500 block

2,160 blocks per hour 15 x 20 x 40 cm
17,280 units in 8-hour shifts

Further information
G1000 block-making machine for the production of precast concrete elements.
G1000 block

2,875 blocks per hour 15 x 20 x 40 cm
23,000 units in 8-hour shifts

Further information
G1500 block-making machine for the production of precast concrete elements.
G1500 block

3,125 blocks per hour 15 x 20 x 40 cm
25,000 units in 8-hour shifts

Further information

Frequently asked questions

What is the production capacity of the G400 block machine?

The G400 is designed to deliver a continuous output of 1,250 blocks measuring 15×20×40 cm per hour, equivalent to up to 10,000 units in an 8-hour working day.

What types of prefabricated elements can I manufacture with the G400?

The versatility of the G400 allows for the production of a wide range of concrete parts, including:

  • Hollow blocks and flower beds
  • Cobblestones of different formats, shapes, textures and finishes
  • Kerbs and gutters
  • Vaulted ceilings and partition walls
  • Tiles and special parts (plug-and-play mould system). All you need to do is change the mould and adjust the programme.
What maintenance does the G400 block maker require?

The G400 is designed to require minimal maintenance. For optimal operation and to extend the service life of the equipment and its components, we recommend:

  • Daily: cleaning and detailed inspection after the end of each shift.
  • Weekly: preventive maintenance, based on the maintenance manual.
  • Monthly: monthly preventive maintenance, as specified in the maintenance manual.
  • Annual: preventive maintenance based on the manual, and annual corrective maintenance.
Can the G400 be customized?
Yes. It can be adapted in a linear or U-shape configuration and integrated with colour dispensers, curing systems and automated logistics solutions. This allows the layout to be adjusted according to the space and needs of the customer.
What type of automation does the G400 offer?
  • The G400 is a fully automatic press, operating via a Siemens PLC.
  • The PLC control (Siemens S7) uses TIA Portal software and an HMI interface for real-time adjustments, parameter definition, operation, and equipment statistics.
  • Full synchronisation with the concrete plant, conveyor belts, tray lift/lower, brushes, turner or palletiser.
What are the foundation requirements?
  • Foundation: reinforced concrete slab according to specifications and terrain characteristics to dampen vibrations and support the weight of the equipment.
  • Headroom: at least 4 metres from floor to ceiling for mould access and maintenance.
Does Grupex offer technical support and spare parts for the G400?

Yes. Grupex offers:

  • Spare parts stock of critical components and responsive support, ensuring efficient after-sales service.
  • After-sales service with detailed manuals and after-sales technical support.
How do I guarantee the quality of the blocks manufactured?
  • Control and adjustment of aggregate and additive dosing in the concrete plant.
  • Good maintenance of equipment, periodic calibration of PLC and vibrators.
  • Mechanical strength tests in the laboratory in accordance with UNE-EN 771-3 standards.
Can I integrate the G400 into an existing production line?

Yes. The G400 supports modular integration with other lines from leading manufacturers in the industry.

What is the service life of the equipment?

When used in accordance with the defined specifications, cleaned daily, properly maintained and fitted with original replacement parts, the equipment can exceed 25 years of use.

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