A mechanical system that mixes, pumps and sprays cement-based plaster onto vertical surfaces to automate manual plastering work, improving speed, consistency and finish quality.
Generally it feeds pre-mixed mortar into a pump, which forces the material through a hose to a spray nozzle; some models apply and level the plaster automatically while others require a trowel for finishing.
Typically cement-sand mortars, lime-cement mixes and many gypsum or polymer-modified renders. Compatibility depends on particle size and mix viscosity—check the machine's specifications for max aggregate size and recommended mixes.
Typical effective plaster thickness ranges from about 2–30 mm per pass depending on nozzle, pressure and model. Multiple passes can build greater thickness; finishing (skim/trowel) may be required for smooth or decorative surfaces.
Productivity varies with material, thickness and operator skill. Typical rates are roughly 50–400 m²/hour. Lightweight skim coats reach higher rates; thick coarse renders are slower.
Machines are offered with electric motors (single‑phase or three‑phase) or diesel engines. Power requirements vary by model—small units may use 1–3 kW single‑phase, larger pumps 5–15 kW three‑phase or equivalent diesel power.
Many automatic plastering machines include an integrated mixer (paddle or twin‑shaft), but some compact units require a separate mixer. Confirm the model specification before purchase.
Surfaces should be clean, free of loose material, properly wetted or primed (bond coat) where required, and any cracks or joints repaired. Proper scaffolding or access is also necessary for safe and even application.
Most machines operate with 1–3 people: one feeding/mixing, one controlling the spray/nozzle and sometimes one finisher. Basic operator training on machine setup, mixing ratios, nozzle handling and safety is recommended and often provided by the supplier.
Portable units can typically be set up in 15–60 minutes depending on site conditions and hose length. Larger trailer‑mounted systems or complex jobs may take longer. Routine pre-start checks are recommended.
Daily cleaning of hoses, pump and hopper is essential to prevent clogging and material cure. Regular inspection and replacement of wear parts (seals, valves, nozzles, hoses), lubrication of moving parts and periodic motor/engine service are required per the manufacturer's schedule.
Yes—reputable manufacturers and dealers supply spare parts (wear rings, pistons, seals, nozzles, hoses) and service. Confirm local dealer support and spare parts availability before purchase to minimize downtime.
Models range from compact wheeled units (roughly 100–400 kg) to larger trailer or truck‑mounted systems (500 kg to several tonnes). Choose based on site access, transport and project scale.
Look for emergency stop buttons, pressure relief valves, guards around moving parts, secure hose couplings and clear operating manuals. Operators should use PPE—eye/ear protection, gloves, respirators and safe handling for cementitious materials.
Warranties typically range from 6–24 months depending on manufacturer and part. Check for quality certifications (CE, ISO) and ask for references, on‑site demonstrations, training packages and after‑sales support when evaluating suppliers.
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