The Bubble Gum Sigma Mixer Hydraulic Kneading Machine is a specialized industrial mixer designed for processing high-viscosity, elastic-plastic materials, particularly in the confectionery industry. It is widely used for kneading and mixing bubble gum base, chewing gum, and similar rubber-like compounds made from ingredients such as chicle (a natural latex sap from the sapodilla tree) blended with flavorings and sweeteners. Bubble Gum Sigma Mixer ensures uniform dispersion, thorough kneading, and consistent texture, making it essential for producing high-quality gum products like center-filled bubble gum or chicklets-style chewing gum.
Bubble Gum Sigma Mixer Video
Key Features
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Sigma Blades (Z-Shaped Kneading Blades): The core component consists of two counter-rotating sigma-shaped (Z) blades that operate at differential speeds—one slower and one faster. This tangential action creates strong shearing forces, transferring material between blades for efficient mixing and kneading without dead zones. Blades are precision-machined to maintain minimal gaps with the trough walls for optimal performance.
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Hydraulic Tilting Mechanism: Equipped with a hydraulic system for easy tilting of the mixing trough to discharge the finished product. This allows for complete emptying and simplifies cleaning. Alternative discharge options include screw extrusion or bottom ball valve for automated or high-volume operations.
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Construction and Durability: Built with heavy-duty stainless steel for food-grade compliance, featuring a robust U-shaped or trough-style chamber, jacketed for heating/cooling. The structure uses thick-gauge metal in the bowl, blades, cover, and jacket to handle intense loads from viscous materials. Safety features include guards, grills, and shaft seals to prevent leaks and ensure operator safety.
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Drive and Power System: Powered by a high-capacity motor and sturdy gearbox with heavy-duty gears to sustain kneading loads. Voltage typically 380V, with options for customization. Non-computerized but includes reliable electronic controls for operation.
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Heating and Cooling Options: Jacketed design supports electric heating, steam, or circulating hot oil for temperature control during processing. Cooling via circulating water is available for post-mixing stages.
Working Principle
The machine operates on a double-arm kneader principle:
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Loading: Raw materials are loaded into the U-shaped trough.
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Mixing/Kneading: The sigma blades rotate in opposite directions at varying speeds, generating high shear and compressive forces. This breaks down agglomerates, disperses additives uniformly, and achieves a stable, homogeneous mass—ideal for semi-dry or rubbery viscous plastics.
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Processing: Kneading continues until the desired consistency is reached, often with heating to reduce viscosity.
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Discharge: The hydraulic system tilts the trough (up to 180°) for gravity discharge, or an integrated extruder forces the material out through a die for direct shaping. This process is efficient for high-viscosity slurries, promoting quick reactions and uniform results while minimizing energy use.
Applications and Benefits
Primarily for food industries like bubble gum and chewing gum production, it also suits pharmaceuticals (e.g., ointments), chemicals (e.g., pigments, resins), and cosmetics. Benefits include:
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High efficiency for tough materials, reducing processing time.
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Versatile for mixing, grinding, dispersion, and drying.
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Customizable for vacuum/pressure operation to handle sensitive formulations.
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Low maintenance with reliable heavy-duty components.
Salient Features of Sigma Mixer Machine
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Available in Stainless Steel 316, Stainless Steel 304 and Mild Steel materials.
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Stainless Steel polish to matt & mirror finish as per customer’s requirements.
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Mild Steel finish with one coat of red oxide and two coats of epoxy paint.
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Discharge option of hand wheel operated (manual) or hydraulic operated (automatic) offered.
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Jacket for heating or cooling application can be offered.
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Mineral wool insulation with cladding on jacket.
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Tangential designed ‘Z’ blades offered for uniform mixing.
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PTFE made shaft sealing provided for food grade compatibility.
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Minimum gap between trough inner shell & blades removes possibility of sticking product.
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On demand Spray system, vacuum system
Optional Features/Accessories of Sigma Mixer
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Liquid Spray System
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Vacuum System
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Blades Cooling Arrangement
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Screw System
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Automatic Valve Discharge System
Process Operation of Bubble Gum Sigma Mixer
In Sigma mixer tangential action of mixing and kneading obtained by ‘Z’ type (SIGMA) shaped kneading blades, which rotates very accurately at different speed towards each other causing product to be transferred from one end to another end. Discharge of the finished product is achieved by tilting the container or through the valves at the bottom or by means of an extrusion screw beside the container.
The mixing action is a combination of bulk movement, stretching, folding, dividing, and recombining of the material. The shearing & tearing action of the material against blades and the side walls causes size reduction of the solids. After the time period required for sterilizing the batch has elapsed, the heating circuit shuts of the pneumatics damper (exhaust) opens and cooling operation commences.
In the tangential design, the blades rotate in the trough meeting tangentially. The front blade generally rotates faster than the rear blade usually in the ratio of 3:2. Tangential blades are generally used for material of higher viscosities such as adhesives, rubber compounds, flush colors, dyes, and pigments.
In the overlapping design, the blades overlap above the saddle of the container. Due to the overlapping action, it is necessary that the relative position of the two blades is unchanged, and as a result, both the blades rotate at the same speed. Materials that flow freely or creep down into the blades are mixed using the overlapping blade action. This design offers a faster interchange of material from one blade compartment of the mixer to the other. Overlapping blade action is used for materials of lighter viscosities such as carbon pastes, clay coating, creams, and ointments. The overlapping blade produces a lower kneading and shearing compared to the tangential blade action.
Technical Specification of Sigma Mixer Kneader
| Model | Capacity – Liters | Motor (H.P.) | ||
| Working Capacity approx. | Gross Capacity approx. | General | Heavy Duty | |
| ASM – 50 | 50 Liters | 80 Liters | 5 H.P. | 7.5 H.P. |
| ASM – 75 | 75 Liters | 110 Liters | 7.5 H.P. | 10 H.P. |
| ASM – 100 | 100 Liters | 150 Liters | 10 H.P. | 15 H.P. |
| ASM – 150 | 150 Liters | 200 Liters | 15 H.P. | 20 H.P. |
| ASM – 200 | 200 Liters | 300 Liters | 20 H.P. | 25 H.P. |
| ASM – 400 | 400 Liters | 550 Liters | 30 H.P. | 40 H.P. |
| ASM – 500 | 500 Liters | 750 Liters | 40 H.P. | 50 H.P. |
| ASM – 750 | 750 Liters | 1150 Liters | 50 H.P. | 60 H.P. |
| ASM – 1000 | 1000 Liters | 1500 Liters | 60 H.P. | 70 H.P. |
| ASM – 1500 | 1500 Liters | 2100 Liters | 75 H.P. | 80 H.P. |
| ASM – 2000 | 2000 Liters | 2600 Liters | 80 H.P. | 90 H.P. |
| ASM – 3000 | 3000 Liters | 3800 Liters | 100 H.P. | 120 H.P. |
* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.
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