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BM Series CFE are screw type rubber cold feed extruders popular in rubber processing industries for highest output, continuous mixing and consistent extrudate quality available with customised die head (like cross head, tube head, single or multiple tread heads, strainer head, or roller head) for your choice of application. Bainite offers duplex or triplex extruder for tire tread and side wall extrusion.

BM Series Cold Feed Extrudes are available in two variants:

  • Pin Type
  • Plain Type

Our CFEs are fast replacing 2 or 3 warming mill setup together with Hot feed extruder.

Plain type Cold Feed Extruder

Bainite make plain type Cold Feed Extruders finds applications in tubes, hoses, cable coating, bicycle tyre tubes, etc. The barrel is constructed in two or three sections depending upon L/D ratio. These are fitted with replaceable, hardened and wear protected liner for durability. The screws are critically designed to have gradually reducing pitch and flight depth in the central zone. Mixing of 2/3 different layers of compound flowing on different screw flight paths, facilitates high shear uniform mixing that gives you consistency in the homogeneity of the mixed rubber compounds.

Key Features

Designed for 24 x 7 operation and automatized – minimize your labour.

Screws completely heat-treated or stellited on the working surface for wear protection ensuring long-life, trouble -free and smooth running.

Solid barrels with spiral cuts at inner diameter also ensure efficient heat transfer.

Specially designed feed-roll assembly reinforces positive strip feed- giving you a leakage- free clean machine operation.

Special Cold Feed Extruders designs available for feeding the calender.

Effortless screw removal is possible manually without any hammering through a special tooling attachment that is supplied along with the extruder.

Screws, made in alloy steel for better strength, are designed with biting features at the feed zone for homogenous mixing, accurate throughput and porosity free compounds.

Liners are either Nitrided, case carburised or bimetallic in construction and is of wet design for efficient heat transfer.

Design and material technology of the die head is adopted to withstand 700 bar max. pressure – eliminates any porosity, free of blisters or bubbles.

Quick and effortless installation/ shifting/ relocation possible due to single base.

Special Features

BM series extruder heads will be equipped with pressure transduce and temperature monitoring and count systems. Bainite adopts latest flow simulation software to ensure that all die-heads are designed to have smooth flow of compound- spread in all directions under proper pressure and speed to eliminate any porosity. This ensures that the final extrudate product are free of blisters or bubbles.

BM Series Extruders will be equipped with customised heads like:

  • Cross Heads
  • Tread Head
  • Pork Chop
  • Strainer
  • Strip
  • Tube
  • Roller Die

Bainite recognizes that with screw having a cantilever design, there is possibility of screw tip area scoring against the barrel inner surface. Hence particular attention is given so that the thrust bearing housing in the gear reducer output assembly is designed to ensure concentric alignment with respect to barrel inner bore across the length of the screw.

Effortless screw removal is possible manually without any hammering through a special tooling attachment that is supplied along with the extruder.

BM Series CFE are equipped with Feed roll assembly which can be effortlessly removed/ reinstalled without disturbing feed hopper. It help in positive feeding of rubber strips. The feed roll is positively driven from screw by inter connecting gears. The roll section can be opened manually/hydraulically for cleaning and maintenance. Both ends of feed roll surface is grooved to prevent rubber reaching the bearing and thus avoids any premature failure. An adjustable scraper blade is provided for continuous roll cleaning.

Model No BM-CFE 75 BM-CFE 90 BM-CFE 120 BM-CFE 150 BM-CFE 200 BM-CFE 250
Screw Diameter (mm) 75 90 120 150 200 250
Screw Length (L/D) 12 12 to 16 12 to 16 12 to 16 12 to 16 14 to 18
Variable Screw RPM 5 to 50 5 to 50 5 to 50 5 to 50 3 to 35 3 to 25
Motor Rating ( kW ) 60 90 132 210 350 500
Capacity (ton / hr) 0.3 0.45 1 1.5 3.5 4.5
Head Profile Customised Customised Customised Customised Customised Customised

Safety Features

Bearing Protection

Condition and temperature monitoring for the purpose of safety.

Motor & Drive Safety

Both Winding coil temperature & Bearing temperature sensors are integrated with drive interlocks.

Gearbox Safety

Both Oil low level switch & Bearing temperature sensors are integrated with drive interlocks.

Safety Guards

All moving parts are provided with safety guards.

Temperature Indicator

All Extruder Heads will be equipped with Smart Temperature Indicator.

Pressure transducer

All Extruder heads will be equipped with Smart Pressure Transducers.

BM Series Hot Feed Extruder