Machine plastering: from bag or silo to finished wall

The plastering machine that does it all

The simplest chain is a plastering machine that does the whole job. Giotto and Giotto Mono dose, mix, pump and spray dry mortar and premixed plasters, and they can be fed both from bags and from a silo.

Turbosol specifies them for internal gypsum and gypsum-lime plaster, external lime and lime/cement coatings, ETICS, insulating plaster and self-levelling floor compounds. Both can be dismantled into four parts, which makes it easier to get them up to the upper floors. Both have a built-in compressor and water pump. Turbosol points out that output and reach depend on the material, the wear on the pump and the hose diameter, and that the stated length and height cannot be reached at the same time:

• Giotto — 400 V three-phase, 30 l/min, 40 bar, 40 m length and 15 m height, 3–5 mm grain size depending on the pump unit. Compressor 250 l/min, water pump 60 l/min, 250 kg
• Giotto Mono — 230 V single-phase, 13, 16 or 18 l/min, 40 bar, 20 m length and 10 m height, 4 mm grain size. Compressor 210 l/min, water pump 45 l/min, 247 kg

From bags: the mixer ahead of the pump

If the pump is only to pump and spray, something else has to do the mixing. Turbomix M22 is a continuous mixer for premixed, cement-based dry mortar in bags. Together with a plaster sprayer or mortar pump, it becomes a complete mixing and pumping system that can be run manually or automatically.

The mixer must deliver at least as much as the pump uses. The M22 has a 90-litre hopper with a grid and bag cutter, a filling height of 105 cm, a 60 l/min water pump and a water circuit with a flow meter. It comes in two versions:

• Single-phase — 230 V, 2.2 kW, 25 l/min
• Three-phase — 400 V, 4 kW, 35 l/min

Fine plastering with one operator

T7 EVO is an example of such a chain on a small scale: a light single-phase screw pump at 0.5–12 l/min for fine plaster and coatings, with a 50-litre hopper and a weight of 80 kg. If it is fed from an automatic mixer with dry mortar in bags, one person can operate it and regulate the material flow from the point of application. Turbosol mentions Turbomix M22R and TP4 as mixers for it.

If the bags are the problem — awkward lifting and dust when small bags are emptied into the mixer — Ahlm's ST0 bag emptier is designed for exactly that.

From a silo: the mixer directly underneath

If the silo is where the plastering is to be done, the mixer can be mounted directly underneath it. Turbomix M55 has a universal flange for gravity silos, a feed screw and a mixing shaft, and delivers 60 l/min with 5.5 kW at 400 V. According to Turbosol, it replaces conventional mortar mixing, cuts the time it takes to prepare the material and greatly reduces daily maintenance.

The M55 comes in manual and automatic versions. The automatic one has a control panel with a 60 l/min water pump and flow meter, but a level sensor is not included. An electric vibrator for the silo and a level sensor are optional extras.

From a silo: conveying by air over longer distances

If the silo is some distance away, the dry mortar can be blown to the machine. Silotur conveys dry premixed plaster and mortar pneumatically from the silo to the plastering machine, at 20 l/min of dry material over 80–140 metres.

The description states one requirement: the plastering machine must have a cover and filter for air separation. The air that carries the mortar forward has to be separated out again at the machine.

• Model C for gravity silos, with a 55-litre pressure tank
• Model P for pressurised silos, with a diaphragm compressor that operates the silo valve
• Rotary vane compressor of 5.5 kW (Silotur 15.26, 80–100 m) or 7.5 kW (Silotur 24.26, 100–140 m), 400 V, with 100 or 140 m³/h of air and max. 2.6 bar
• 50 m material hose Ø 45 with Storz couplings, and a 42 V level switch with 50 m of cable, so that Silotur is controlled from the plastering machine

The silo itself

Ahlm states that its silo products are dust-tight and have a conical outlet with a vibrating beam for complete emptying, but on the ST-5 the vibrator is an option. TB 10 holds 6.5 m³, equivalent to 10 tonnes, and ST-5 is a 1 600-litre big bag emptier with a low overall height for indoor use. Both are rated at 200–400 kg/min.

Which silo works with which mixer or conveyor is not stated in the data sheets. This must be clarified for the specific combination before anything is ordered.

When you contact us

Tell us whether the mortar comes in bags or a silo, and which plaster product is to be applied — the supplier's product name is enough. Also tell us how far and how high it is from the machine to the wall, whether three-phase power is available on site, and how far the silo is from where the plastering will be done.