1. Pre-Storage: Thorough Cleaning
Residual materials (e.g., concrete, mortar, or other mixed substances) will harden, corrode components, or block pipelines during idleness. Complete cleaning is the foundation of preservation.
Internal Barrel & Mixing Blades
Run the mixer with clean water for 10–15 minutes to flush residual materials. For sticky materials (e.g., concrete), use a soft brush (avoid hard tools to scratch the inner lining) to scrub the blades, barrel walls, and discharge ports.
After cleaning, run the mixer again with dry compressed air (or let it idle for 30 minutes) to fully dry the internal moisture-moisture is the main cause of rust.
Pipelines & Valves
Flush all material-feeding pipelines, water supply pipelines, and additive pipelines with clean water. For pipelines prone to blockage (e.g., small-diameter additive pipes), use a high-pressure water gun to clear residues.
After flushing, open all valves (inlet, outlet, drain) to drain remaining water, then close them to prevent dust entry.
External Surface
Wipe the external shell, control panel, and electrical boxes with a dry cloth to remove dust, oil stains, or material splatters. For stubborn stains, use a neutral detergent (avoid acidic/alkaline cleaners that damage paint).
2. Lubrication: Protect Moving Parts from Wear
Long-term idleness can cause lubricating oil to deteriorate or seep, leading to dry friction and rust on moving components.
Key Lubrication PointsFocus on parts with relative motion, including:
Mixing blade shafts and bearings
Gearboxes and reducers
Discharge door hinges and actuators
Conveyor chain (if equipped)
Lubrication Methods
Drain the old lubricating oil from gearboxes/reducers completely, then add new oil that meets the manufacturer's specifications (check the manual for oil type and viscosity, e.g., 46# anti-wear hydraulic oil). Fill to the specified oil level (marked on the oil sight glass).
For bearings and hinges, inject lithium-based grease (common model: 3# lithium grease) into the oil cups until grease overflows slightly-this ensures full coverage of the friction surface.
After lubrication, manually rotate the mixing blades or discharge door 2–3 times to distribute the lubricant evenly.
3. Anti-Corrosion & Sealing: Isolate Moisture and Dust
Moisture (from air or environment) and dust are the main causes of component corrosion and blockage. Sealing and anti-rust treatments are essential.
Metal Surface Protection
For exposed metal parts (e.g., uncoated bolts, discharge ports, or blade edges), apply a thin layer of anti-rust oil (or Vaseline) to form a protective film. Avoid applying oil to rubber seals (it may accelerate aging).
If the mixer is stored outdoors or in a humid environment, cover the entire machine with a waterproof and breathable cover (avoid plastic sheets that trap moisture inside).
Electrical System Protection
Turn off the main power switch and unplug the power cord. Wrap the plug with a waterproof plastic bag and fix it to prevent moisture.
Open the electrical box door, place 2–3 moisture-absorbing bags (e.g., silica gel packs) inside, then close the door tightly to prevent internal circuit boards or wiring from getting damp and short-circuited.
Internal Sealing
Cover the feed inlet and discharge port with waterproof canvas or plastic film, and secure it with ropes to block dust and rainwater. For the water supply pipeline inlet, install a plug to prevent debris from entering.