The electric cylinders of the CMS... series are precise and powerful. When combined with a MOVIDRIVE® drive inverter, they ensure high process reliability.
Creating a high-quality and visually attractive chocolate product requires complicated process engineering. This is where the electric cylinders from SEW‑EURODRIVE come into play. With their compact size, high power, and suitable displacement curves, they ensure that the chocolate is injected evenly into the molds.
Combined process steps for tasty results
The company Böhnke & Luckau GmbH in Wernigerode, Germany develops and constructs machines and complete systems for the chocolate industry. Whether in the D-A-CH region, Eastern Europe, the Middle East or East Asia, machinery from Böhnke & Luckau is used in many countries around the world. The specialty of this Wernigerode-based company is its molding lines. These lines create chocolate products in any shape imaginable. The block line from Böhnke & Luckau features a high power rating and is suitable for injecting chocolate into large molds up to 5000 grams. The system mixes, tempers, doses, vents and cools the chocolate. The system uses various mold sizes and a long cooling time to prevent weak spots or cracks from forming in the large blocks. The molds circulate within the system and can be exchanged. The XXL system can therefore fill between 15 and 22 molds per minute (depending on the mold sizes) and produce up to 2500 kg per hour. The block filling system from Böhnke & Luckau has a modular design. The casting machine injects the raw chocolate into the mold. The mass of raw chocolate enters through a heated funnel with an agitator. A shaking unit then evenly distributes the liquid chocolate into the mold. This shaking ensures that the chocolate mass has a homogeneous structure and prevents air pockets. A PLC controls all the processes in the system. A touch panel is used to operate the system.
The chocolate is injected into the mold through a distribution plate with milled cavities, i.e. hollow spaces running through it. An SEW‑EURODRIVE electric cylinder is connected via a crank to a shaft, to which a comb-shaped piston base is attached. This base is attached to the individual pistons that travel laterally into the injector head. This head contains pneumatic rotary valves. These rotary valves are cylinders with an L-shaped cutout and act as stoppers. They rotate by 90°. This closes off the residual flow from the filter. The pistons come in from the side and press the mass through a distribution plate with channels that is located below the mass. The channels collect the chocolate mass and distribute it evenly among the nozzles, which are screwed onto a nozzle plate. The motion of the pistons causes the chocolate to be injected into the polycarbonate mold.