Patent ID: 11858179
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. A method, comprising:
forming a thermally expanding mandrel using an expanding material composition, wherein the expanding material composition comprises thermally expanding particles and binder material, wherein the thermally expanding mandrel includes at least one surface feature that forms a corresponding surface feature on an interior surface of a component which is defined by a variation in a wall thickness of the component, and wherein the at least one surface feature of the thermally expanding mandrel includes at least one of a protrusion, bump, indentation, or dimple;
applying component material to the thermally expanding mandrel;
inserting the thermally expanding mandrel into a molding tool; and
applying heat to at least one of the thermally expanding mandrel or the molding tool during a period of time, wherein the thermally expanding mandrel expands and the component material cures to form the component including the corresponding surface feature on the interior surface of the component during the period of time; and
wherein the expanding material composition is configured to at least one of fracture or dissolve to facilitate removal from the component.