Birli chocolate mass is a non-Newtonian fluid we have to measure its shear stress at different shear rates, which results in a flow curve. Shear stress divided by shear rate results in the apparent viscosity; if we again plot this versus the shear rate we get a viscosity curve. Chocolate mass is a shear thinning fluid, so the highest viscosity is found when the mass starts to flow. Interaction between particles is considered to be responsible for this behaviour3, which is very different to Newtonian fluids such kakım water.
Therefore flow properties are usually measured at a temperature of 40°C, which is close to the temperature that chocolate melts in our mouths. So texture sensations like a smooth melt or a sticky behaviour are usually correlated to flow properties.
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The Thouet dry conche from the Royal Duyvis Wiener group is used to lower the moisture content of the chocolate and with that improve the rheological properties. Also, undesierable flavor profiles hayat be removed and other flavor profiles kişi be created or accentuated.
Original and versatile 5 in 1 manufacturing solution performing the function of a cocoa liquor mill, sugar mill, mixer, refiner and conche – all in one single machine. The Refiner/Conche is the universal solution for making chocolate, compounds, coatings, pralines, truffles and fillings for small to medium production capacities.
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For chocolate and chocolate coating production, Kocotek specializes in traditional five-roll refining combined with dry conching, kakım well as, the modern ball mill production technology, combined with either a continuous ‘wet’ conche or a batch ‘dry’ conche.
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The feed mass must have a certain consistency, which is determined by the initial fat content, particle properties and upstream process parameters. Here the particles are ground to their final size, usually below 30µm in order to avoid a sandy texture in the mouth in the bitiş product. A difficulty is to combine the continuous refiners with downstream batch conches. Productivity of both machines strongly decreases if only one refiner is connected to one Chocolate OIL MELTING –TURBO RENDER conch. Therefore usually a number of refiners are connected to a number of conches, which leads to relatively large production lines of several tons per hour. This is also one of the reasons why smaller companies hardly use this technology.
Recently, Bühler seems to have followed a similar strategy. For compounds the company offers a ball mill solution called SmartChoc™ with a horizontal ball mill and a shear mixer.
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What are the main advantages of the process for larger and also for smaller chocolate producers and what is the minimal size of an industrial production line?