Helical Conduit Casting via Segmented Disposable Cores

The continuous helical conduit is divided into multiple discrete helical sections, each formed by separate cores. This segmentation prevents core shifting and flexing issues that occur with long continuous cores, while still achieving effective heat dissipation through the distributed helical passages throughout the housing.

The patent uses disposable sand cores that are discarded after casting. These temporary cores form the helical passages during casting, then are removed to create the cooling conduits. This approach avoids the need for expensive, complex tooling required for continuous helical coring while accepting that each core is used only once.

The cooling system is segmented into multiple discrete helical passages formed by separate cores rather than one continuous complex conduit. This simplifies the tooling requirements, as each section can be formed independently with simpler, less expensive coring operations.

The patent employs inexpensive disposable sand cores instead of expensive permanent tooling. The cores are simple sand forms that are discarded after a single use, eliminating the need for costly specialized equipment required for continuous helical conduit formation.

The patent extracts the problematic continuous helical core and replaces it with multiple discrete segmented cores. This eliminates the axial compression issue that occurs in continuous cores during solidification, as each short segmented core is independent and does not experience the same compressive forces.

By using disposable sand cores that are intentionally designed to be removed after casting, the patent accepts the need for access holes and sand removal as part of the manufacturing process. The cores are cheap enough that the additional post-casting work is acceptable compared to the savings in tooling complexity.