Co-Molded Washing Machine Tubular Bushing for Static Charge Dissipation

The patent applies composite materials by combining plastic (polymer) and metal (conductive) materials in a single tubular bushing component. The bushing consists of a plastic matrix with embedded conductive metal elements (such as steel wires or metal layers), creating a composite structure that provides both the manufacturing advantages of plastic (ease of molding, weight reduction) and the electrostatic dissipation properties of metal. This composite approach resolves the contradiction by integrating both material benefits into one hybrid component.

The patent applies local quality by creating regions with different electrical properties within the same bushing structure. The plastic portions provide insulation and structural form, while strategically placed metal elements (such as conductive layers or embedded wires in specific locations) provide electrostatic dissipation paths. This localized distribution of conductive and insulating properties allows the bushing to simultaneously achieve ease of manufacture from plastic molding and electrostatic control from metal components.

The patent uses composite materials to maintain the weight advantage of plastic while eliminating electrostatic discharge risks. The plastic matrix provides lightweight structure, and embedded conductive metal elements (such as steel wires or metal coatings) create continuous electrostatic dissipation paths through the bushing, preventing charge accumulation during drum rotation despite the overall reduced weight.

The patent introduces metal conductive elements as intermediary components within the plastic bushing structure. These metal intermediaries serve as electrostatic discharge pathways, mediating between the insulating plastic material and the need for charge dissipation. The metal elements act as conductive bridges that allow static electricity to escape while the plastic provides the lightweight structural framework.

The patent merges the structural bushing function and electrostatic dissipation function into a single co-molded component. During the co-molding process, conductive metal elements (such as wires or layers) are integrated directly into the plastic bushing material, combining formability and electrostatic control in one manufacturing step. This merging eliminates the need for separate electrostatic dissipation components or post-assembly steps, maintaining high productivity while simplifying the overall system complexity.

The patent creates a multi-functional tubular bushing that simultaneously provides mechanical support, rotational guidance, and electrostatic dissipation. The co-molded design integrates multiple functions into one component: the plastic provides structural support and formability, while embedded metal elements provide electrostatic discharge pathways. This universal design eliminates the need for separate dedicated electrostatic dissipation devices, reducing system complexity while maintaining production efficiency.