Multi-Resin Composite Transition Zones

The patent applies parameter changes by controlling the viscosity of resins through temperature adjustment. By heating the resin to be injected second, its viscosity decreases, allowing it to flow ahead of the first resin and create a gradual transition zone. This viscosity parameter modification enables the formation of intermixed transition regions that reduce stress concentrations while maintaining efficient multi-resin manufacturing

The patent creates a composite structure at the resin interface by forming transition regions where different resins are intermixed. This composite transition zone, rather than a sharp interface, distributes stress more effectively and reduces stress concentrations. The intermixed resin regions act as a gradient composite material that bridges the properties of the two distinct resins

The patent employs self-service by allowing the resin flow dynamics and viscosity differences to automatically create the desired gradual transition regions. The process leverages the natural flow behavior of viscous fluids under pressure, where the heated resin naturally flows ahead and intermixes with the first resin. This self-organizing flow pattern eliminates the need for complex control systems or additional manufacturing steps to create transition zones

The patent replaces complex mechanical control systems with thermal field control. Instead of using mechanical means to create gradual transitions (such as gradual injection rate changes or complex mold designs), the invention uses temperature field manipulation to control resin viscosity and flow behavior. This substitution of mechanical control with thermal control simplifies the manufacturing system while achieving the desired gradual transition regions