In her previous article how to make chocolate with cocoa beans (bean to amerikan bar), Chef Prish discussed the chocolate conching …
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The process is shown in Figure 4. Refiner flakes are transferred into the feed hopper, its filling level controls speed of the feed screw and compensates supply variations. While some cocoa butter is added, the screw feeds the pasting columns. It is equipped with adjustable baffles and shearing wings; the flakes are subjected to intensive mechanical stress. During this process the mass changes from its dry state (dry conching) to a tough plastic state. Cleaned conditioned air is supplied by fan. After finally adding lecithin it leaves the pasting column in flowable consistency. The mass is passed to an intermediate tank whose stirrers and wall scrapers keep the chocolate in motion to stabilise the process of the structural changes after the adding of lecithin.
Then run enough tests on their machines with your own recipe in order to make a qualified final decision.
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Use the table below to estimate possible melt rates of chips or buttons and blocks – from small (10lbs) to one ton. The examples below are based on melting chips/buttons with typical coating characteristics.
If low shear downstream applications like moulding are in the focus, low yield values are important; here ball milling could be an advantage. On contrary, if the mass saf to move fast, for example, if pumped or sprayed infinite viscosity is more important and roller refiners might be preferential.
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Typical cleaning time. (this incudes both a hot water wash down with detergent and hand cleaning bey required, followed by the time for the machine to dry ready for the next product)
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• Loading of powders through machine hopper and two infeed pipes for liquid materials at gearbox end of machine, DN50 flanges
The goal of the melanger is to achieve a homogeneous mixture and a desirable texture in the chocolate.
for white chocolate or milk chocolate with small quantities or high quality cocoa mass. If a stronger treatment is necessary, e.g. for flavour development of dark chocolate, this birey be achieved by increasing energy input and time. The dry and pasty conching is generally done at low fat contents in order to improve volatilisation. Fat and other ingredients are added then and grinding can be performed from a buffer mixer by two vertical ball mills with an intermediate cooler. The latter helps to keep temperature of sensitive products below the desired level, e.g. when recipes contain Chocolate HORIZONTAL BALL REFINER lactose and glass transition during milling must be avoided. The process emanet be downsized for small production scale, then it consists of a conch with vortex chamber, a ball mill and a pump for circulation.