Application:

The centrifugal muller has been designed to make moulding sand of fresh and old, natural and synthetic ingredients. The machine is destined to operate in foundries, in mechanised and automatic sand processing plants in plus temperatures.

Operation principle:

When sand is ready it is discharged through the discharging flap in side wall of the muller. The muller has been designed to operate at automatic and manual control. The machine needs to be connected to dust extraction system Ingredients of moulding sand measured by feeders and charged into the machine are mixed by means of a mixing unit consisting of blades and rollers and rotating inside the mixer. Air blown by fan into the mixer at adequate time cools down and fluffs the processed sand. 

The mixer includes the following equipment:

• sand feeder,
• two screw feeders of loose additives,
• water feeder,
• electro-pneumatic control valves block,
• compressed air system,
• electrical outfit.

To Customer’s request the mixer can be supplied according to voltage supply requirements or climatic requirements:

• including complete equipment,
• including equipment at Customer’s discretion,
• without equipment.

Depending on the location of discharging opening and fan with regard to the main motor the mixer can be supplied in several versions (MP-030B, MP-060, MP-090, MP-120, MP-200) as show in the attached drawings. Equipment, voltage and climatic requirements ought to be clearly indicated in the order. Otherwise, the mixer shall be supplied without equipment, in A1 version and adapted to voltage supply 220/380V, 50 Hz.

Technical specifications:

	Unit	MP-30B	MP-060	MP-090	MP-120	MP-200
Single load	kg	300	600	1000	1350	1750
Capacity at cycle
60 s	t/h	18	36	60	80	105
90 s		12	24	40	54	70
Loading time	s	10	10	10	8	10
Adjustment range of cycle time	s	40÷120	40÷120	40÷120	40÷120	40÷120
Compressed air working pressure	MPa	0,5÷0,6	0,5÷0,6	0,5÷0,6	0,5÷0,6	0,5÷0,6
Compressed air consumption for 8h operation	m3	36	36	36	24	24
Required capacity of dust extraction equipment	m3/h	7000	11000	11000	11000	18000
Required vacuum at connection pipe	Pa	200
Total installed power	kW	62,1	86,6	101,6	143,6	183,6

We offer dust extraction equipment with our mixers:

• the stated mixer’s capacity applies to moulding sand made of used sand and refreshed with silica sand, bentonite, coal dust and water,
• 1-minute mixing cycle is recommended for sands of strength below 0,9kg/cm2, whereas 1,5-minute cycle for sands of strength 0,9 ÷ 1,5 kg/cm2,
• to achieve the cooling effect the mixing cycle shall be 90 ÷ 120s long, then the temperature of sand discharged from the mixer shall be about 150C° above the ambient temperature.