The CONSTMACH CPM-1 pan concrete mixer is a 1 m³ class machine offering the simple, easily maintained pan structure at mid-capacity output. Its applications, products, installation and servicing are outlined below.
Where the CPM-1 Is Used
This capacity suits producers who need moderate volume with the simplicity and low cost of the pan type. Typical applications include:
- Mid-sized precast yards producing blocks, kerbs, slabs, pipes and modular elements
- Block and paving-stone plants handling coarse aggregate feed
- Low-to-medium capacity batching plants serving local construction
- Decorative and architectural concrete production in moderate batches
- Operations upgrading from a smaller pan mixer that need more output without added complexity
What It Produces
At 1,250 litres of fresh concrete and 1,000 litres compacted per batch, the CPM-1 produces mid-capacity batches of plastic and semi-dry concrete with even consistency. The arm-and-scraper action gives good homogeneity for general, block and decorative work, while for the most demanding dry-cast or high-strength mixes a planetary mixer provides more intense mixing.
Installation and Power
The 37 kW drive requires a three-phase supply rated for its higher start-up demand than the smaller pan model. The modular construction lets the mixer ship within closed truck trailers and standard containers and install in a compact footprint. Mounted above the discharge point, it requires a supporting structure able to carry the mixer mass and the dynamic load of a full 1 m³ batch.
Maintenance and Wear Parts
The simple structure keeps the arms, scrapers and discharge area accessible for cleaning and inspection, which shortens maintenance downtime at higher cycle rates. The 25 mm Ni-Hard4 arms and scrapers are chosen for long life, with the 10 mm Hardox 450 side plates and 10 mm St 52 bottom replaceable individually. The sprung arm fixation table protects the arms against strong or oversized aggregate, and the maintenance door safety switch should be tested regularly to confirm it isolates the drive when the hatch is open.
Comparison With Other Mixer Types
The pan mixer is simpler and lower in cost than a planetary mixer and is favoured for precast, block and decorative work. A 1 m³ single shaft mixer is more economical for bulk general ready-mix, while a planetary mixer of the same class delivers more intense mixing, higher strength and cement saving for demanding mixes. The CPM-1 fits producers who want a robust, easily maintained mid-capacity mixer rather than a specialised high-performance unit.
Operating Considerations
At 1 m³ the CPM-1 runs more cycles per shift than the entry model, so cleanout discipline matters more: the pan should be cleared of residual concrete before it sets, which the simple open structure and accessible discharge make quick. Block and paving plants feeding coarse aggregate rely on the sprung arm fixation table to limit arm breakage, though the pan should not be loaded beyond its rated charge. The 37 kW drive needs a three-phase supply with adequate start-up capacity, and operators should monitor the Ni-Hard4 arms and scrapers for wear so that mixing elements are renewed before consistency is affected. Keeping a small stock of replacement liners limits downtime at higher cycle rates.
CONSTMACH can advise on layout, liner specification and spare-part planning to match the CPM-1 to a specific precast, block or batching plant.
