Bild der LR300 aus der LR Ko-Kneter Baureihe von BUSS

LR Co-Kneader The specialist for the food industry

BUSS Co-Kneader technology for food processing and manufacturing gum base

The first BUSS Co-Kneader for food processing was delivered to a chocolate manufacturer in 1948. Gentle working, efficient self-cleaning and easy accessibility to the process zones, typical for these machines, have always been indispensable requirements in this field. Due to similar compounding requirements, LR Co-Kneaders are suitable for the food industry and for processing elastomer silicones.

Today, BUSS Co-Kneaders are used in the food industry for compounding chocolate and brittle dough, producing sugar concentrate and soft chews, as well as for the preparation of chewing gum base, chewing gum and bubble gum. BUSS LR Co-Kneaders for the food industry have a larger free volume (Do / Di = 1.81) than those used in the plastics industry, a smaller diameter/stroke ratio (Do / H = 4.0) and a lower shear rate.

Modular Kneading Screw – The central shaft carries the attachable screw elements. The locknut at the end of the screw secures the set of screw elements. The central screw shaft is hollow along its entire length. This allows the heat transfer circuit to remain closed when the screw elements are removed from the central shaft, ensuring uninterrupted heat transfer.

Injection Pin – This allows for precise injection of viscous liquids at any point in the cylinder without clogging the injection channel. Thanks to a spring-loaded closure, the channel remains closed when no liquid is supplied. The identical contours of the kneading and injection pins maintain mixing efficiency, while the flexible placement of the pins allows for easy and efficient injection along the mixing process.

Pin with Thermocouple – A kneading pin is drilled to insert a spring-loaded thermocouple, which is protected against wear. The thermocouple accurately measures the material temperature as it sits in the shaft and is hardly affected by running temperatures. Identical contours of the pins ensure unchanged mixing performance.

Operating principle advantages

The unique operating principle of the BUSS LR Co-Kneader ensures gentle, yet homogeneous processing. In addition, the efficient macro- and micro-mixing results in a narrow residence time distribution and an excellent self-cleaning capacity. Consequently, BUSS LR Co-Kneaders are first choice for shear-sensitive products such as

Pastries, cakes and biscuits
Breakfast cereals
Snack pellets
Chocolate doughs
Sugar concentrates
Soft chews
Chewing gum, bubble gum and gum base

More about our process technology

Impressive processingof chew mass with the LR Co-Kneader

The LR Co-Kneader’s gentle, yet homogeneous preparation is most clearly impressive during the continuous drawing of chew mass. Sugar mass fed at about 90°C is cooled down to about 40°C and crystallized in the BUSS Co-Kneader, which thus also serves as a heat exchanger for dissipating the crystallization heat. Constant orientation in the shear zone of the BUSS Co-Kneader ensures an extremely fine and uniform crystal structure for optimal chew mass texture and chewing enjoyment.

LR300-7D_ko-kneader-for-gumbase-production

Technical data

BUSS LR Co-Kneader sizes range from screw diameters of 100 to 400 mm for throughputs of 200 to 7000 kg/h.

LR 100

Overall length incl. drive assembly	11 L/D: 3.200 15 L/D: 3.600 19 L/D: 4.000
Height [mm]	1.250
Center line height [mm]	1.000
Width [mm]	1.200
Feed port height [mm]	1.090
Weight [kg]	11 L/D: 1.500 15 L/D: 2.050 19 L/D: 2.600
Max. screw speed [rpm]	300
Max. drive rating [kW]	50

LR 200

Overall length incl. drive assembly	11 L/D: 7.100 15 L/D: 7.900 19 L/D: 8.700
Height [mm]	1.550
Center line height [mm]	1.095
Width [mm]	1.200
Feed port height [mm]	1.325
Weight [kg]	11 L/D: 3.300 15 L/D: 4.000 19 L/D: 4.500
Max. screw speed [rpm]	250
Max. drive rating [kW]	115

LR 300

Overall length incl. drive assembly	11 L/D: 9.800 15 L/D: 11.000 19 L/D: 12.200
Height [mm]	1.900
Center line height [mm]	1.450
Width [mm]	1.400
Feed port height [mm]	1.745
Weight [kg]	11 L/D: 10.000 15 L/D: 12.700 19 L/D: 15.000
Max. screw speed [rpm]	150
Max. drive rating [kW]	200

LR 400

Overall length incl. drive assembly [mm]	11 L/D: Specification depends on requirements 15 L/D: 12.700 19 L/D: Specification depends on requirements
Height [mm]	1.500
Center line height [mm]	1.250
Width [mm]	2.200
Feed port height [mm]	1.550
Weight [kg]	11 L/D: Specification depends on requirements 15 L/D: 14.000 19 L/D: Specification depends on requirements
Max. screw speed [rpm]	120
Max. drive rating [kW]	280

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More about us

LR Co-Kneader for Gum Base

BUSS AG, Switzerland, is the sole supplier of continuous mixing extruders for sugar-free chewing gum. Read more in the case study.

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LR Co-Kneader Brochure

All detailed information on our LR Co-Kneader series for the food industry summarized in one document.

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