Laminar Squeeze Casting

When producing copper and aluminium rotors for asynchronous motor types, most of the producers struggle to satisfy specific needs for industrial standards. Especially the automotive industry requires highest technological and quality standards. To satisfy these wishes our holding company Breuckmann GmbH & Co. KG developed a cost-effective high performance casting process during the past 10 years. This process was named Laminar Squeeze Casting – LSC.   The Laminar Squeeze Casting uses a patented gate technology, which allows a steady non-turbulent filling of the rotor. Therefore the slots inside the lamination bundle as well as the short-circuit rings on both ends of the Zero Porosity Rotor achieve maximum material density combined with minimum porosity. As a consequence the electrical conductivity is very high increasing the torque speed as well as the final performance of the electric engine. The result is a rotor equipped with exceptional characteristics satisfying highest expectations of various industries.

Laminar Filling

The rotationally symmetrical gating system and the perfectly harmonized gating speed fill our rotors steadily in a controlled way. During the casting process no conflicting melt fronts are generated. Also pores and blowholes are reduced to a minimum. As a result we are able to reach maximum efficiency and optimum heat dissipation with our rotors.

Squeezing

Ordinary casting technologies use metals with physical characteristics leading to blowholes or porosities during the solidification process. Based on different geometries and wall thicknesses, the solidification finally takes place in the middle of the object, because there is the heat center. Subsequently, at this spot the largest volume deficit is located and blowholes as well as pores occur. To counteract the inner volume deficit, the melt gets compressed during the Laminar Squeeze Casting by a feeding. Therefore blowholes and porosity are reduced to a minimum.

Casting

breuckmann eMobility produces its rotors using a process that is similar to die casting. Due to this working method we are able to maximize the amount of conductive material as well as the fill factor of our rotors. The result is that the slots inside of the rotor are completely filled. A connection between short-circuit ring and slots can be reached easily through the melt without the necessity of any extra material. On the basis of the high density of conductive material, the flow of electrons inside of the rotor improves causing the torque as well as the performance of our products to reach a maximum level.