Extruders for rubber processing

Use of the machine

The extruders for rubber processing are designed for processing of rubber compounds by means of extrusion (endless lengths, the shapes thereof are:belts, hoses, bars or others profiles), further for cleaning of compounds.

Description of the machine

The machine consists of following principal parts: frame, gear box, working barrel, screw, feeding device, tempering unit, control panel, steering switchboard (control cabinet) and drive.

Drive of the machine

The electric motor of the drive is supported under the gear box on a traversable frame. The torsional moment is carried by V-belts towards the gear box shaft.

Working barrel

The working barrel consists of parts and is supported by a flange to the gear box. In the first part, there is a feeding hopper accommodated for feeding of the machine by a feed roller. Further parts of the barrel are divided into heating zones with independently controlled temperatures.Each heating zone is fitted with a temperature sensor which serves for checking of temperature mode.

Screw

The screw is made from nitrided and polished steel.The profile of the helix depends on the kind of treated material. The screw is deep-bored for the purpose of cooling.

Heating and cooling

The working barrel is cooled with pressure water circulating in cooling circuits of particular heating zones.The pressure water is heated up by electric heating units or cooled by cold water.

Working pin-type barrel

The working pin-type barrel is divided into two design units, which are connected by a flange. The whole barrel is divided into 3 tempered zones. The tempering agens is water.The mixing pins are situated into 2-nd and 3-rd tempering zones and have a cylindrical shape.The number of pins is 6, which are arranged in 3 rows.

Screw with pins

The screw has a special accomodated inlet zone for better material inlet. For each plane of mixing pins is the helix interrupted by a groove, which enables the rotating of the screw without problems.

Technical data of extruders for rubber processing

Type 031 017 031 015 031 016 031 018 031 012
pin-type 		031 021
pin-type 		031 019 005 703 005 704
Screw diameter [mm] 50 63 75 90 90 120 120 125 250
Screw length [L/D] 15 15 15 15 15 15 15 5 4
Feeding cold cold cold cold cold cold cold warm warm
Heating zones 2 3 4 4 3 3 4 2 2
Screw revolutions [rpm] 0-80 0-60 0-60 0-60 0-45 2-50 0-60 2-60 2-60
Motor output [kW] 15 40 50 60 65 110 100 40 164
Machine output [kg/h] 50-80 50-200 50-250 50-315 32-320 650-1000 50-600 50-400 1000-3000
Dimensions
of the
machine 		Length [mm] 1850 2300 2600 2900 2530 3350 3450 2660 4330
Width [mm] 1000 1100 1100 1350 935 880 1000 825 2050
Height [mm] 1650 1650 1650 1650 1932 1740 1650 1680 1850