The CONSTMACH CPLN-1.5 planetary concrete mixer is a 1.5 m³ twin-motor machine for large precast and high-strength production. Its applications, output, installation and servicing are set out below to support plant planning.
Where the CPLN-1.5 Is Used
This capacity is chosen by large producers who need substantial planetary-mixed batches. Typical applications include:
- Major precast plants producing beams, columns, panels, pipes and large architectural units
- Structural and high-strength concrete for bridges, tunnels and heavy infrastructure
- Self-compacting concrete production requiring uniform dispersion at large batch size
- High-volume decorative and exposed-aggregate concrete lines with multiple mould stations
What It Produces
At 2,000 litres of fresh concrete and 1,500 litres compacted per batch, the CPLN-1.5 delivers large-batch volume while preserving the thirty-second mixing time and tight consistency of the twin-star planetary action. It homogenises stiff zero-slump and high-performance mixes more evenly than single shaft or pan mixers, supporting demanding precast schedules.
Installation and Power
The twin 30 kW motors require a three-phase supply and a control panel sized to start and run both drives. The mixer is a substantial unit, so it is installed in a stationary precast plant or above a batching tower on a structure engineered for the mixer mass and the dynamic load of a full 1.5 m³ batch. Each oil-bath gearbox should be mounted level with adequate ventilation and the oil level verified at commissioning.
Maintenance and Wear Parts
The 10 mm Hardox 450 floor is laid as individually replaceable tiles; the 10 mm side plates and 25 mm arm plates can be upgraded to Ni-Hard or chromium carbide for harder aggregates. Both oil-bath gearboxes need scheduled oil checks, the rubber discharge-door seals should be inspected for wear, and where optional extra doors are fitted each seal and actuator should be serviced. The cover latch and maintenance door safety switch must be tested to confirm they disable start-up when the pan is open.
Comparison with Other Mixer Types
Against a single shaft mixer of similar size, the CPLN-1.5 mixes more intensely and uniformly, giving higher strength and cement saving of around 10 to 15 percent at a higher purchase price and installed power. Pan mixers are not generally built to this batch size and remain small-batch tools. The planetary type is the premium choice for large precast, structural and high-strength production, while single shaft mixers stay more economical for bulk general ready-mix.
Operating Considerations
With two drives and two stars, commissioning and routine servicing of the CPLN-1.5 cover both motors and both gearboxes, so maintenance planning should account for the duplicated drive train. The large pan handles a high tonnage of material each shift, making liner monitoring important: the individually replaceable floor tiles and the side and arm plates should be inspected on a programme and renewed before wear affects mixing. Where the optional extra discharge doors are fitted to feed several mould stations, each door's rubber seal and hydraulic actuator add to the maintenance schedule but reduce concrete handling time between pours. The high-security cover latch disables start-up while the cover is open, enforcing safe access to the large pan during cleanouts.
CONSTMACH can advise on the number of discharge doors, liner specification, layout and spare-part planning to match the CPLN-1.5 to a specific large precast operation.
