# A New Head for Friction Stir 3D Printing Metals > This patent describes a specialized part, called a deposition head, for a machine that 3D prints metal by stirring and fusing materials together, creating strong joints. - **Patent:** US 12734604 - **Original title:** Deposition head for friction stir additive manufacturing devices and methods - **Granted:** 2026 - **Status:** Active - **Times cited:** 0 - **Field:** automotive, aerospace, mechanical, materials ## What it does This patent describes a device for joining two metal work-pieces using a process called friction stir additive manufacturing. The device includes a rotating spindle that deposits a filler material along a weld line as the machine moves. A key component is the deposition head, which surrounds part of the spindle but remains stationary while the spindle rotates. This head has a specific design: it features a first semi-cylindrical portion and a second semi-cylindrical portion positioned perpendicular to the first. The second portion includes a chamfered inner surface, which is designed to precisely shape the final weld, controlling how the material is laid down and fused. For example, this device could be used to add new material onto an existing metal structure or join two plates together with a strong, precisely formed seam. ## What it does NOT cover - Does not cover friction stir manufacturing devices that do not include a deposition head with both a first and second semi-cylindrical portion. - Does not cover deposition heads where the second semi-cylindrical portion lacks a chamfered inner surface. - Does not cover additive manufacturing methods that do not rely on friction stir principles. - Does not cover devices where the deposition head rotates relative to the spindle. - Does not cover joining work-pieces without depositing a filler material. ## The clever bit The clever bit is the specific design of the deposition head, featuring two perpendicular semi-cylindrical portions and a chamfered inner surface. This geometry is intended to precisely guide and shape the filler material as it's deposited by the rotating spindle, allowing for better control over the final weld profile and material properties. ## Real-world examples 1. Aerospace components like aircraft fuselage panels 2. Automotive parts for lightweight vehicles 3. Shipbuilding structures 4. Repairing metal components 5. Building custom metal prototypes ## Why it matters Friction stir additive manufacturing is a crucial technology for creating strong, high-quality metal parts, especially for industries like aerospace and automotive. It allows for joining dissimilar materials and building complex geometries with minimal distortion. This patent aims to improve the precision and control of the material deposition process, which can lead to even better weld quality and expanded applications for this manufacturing technique. ## Frequently asked questions ### What does A New Head for Friction Stir 3D Printing Metals cover? This patent describes a specialized part, called a deposition head, for a machine that 3D prints metal by stirring and fusing materials together, creating strong joints. ### When does this patent expire? This patent is expected to expire on September 15, 2046, when the invention enters the public domain. ### What problem does this patent solve? Friction stir additive manufacturing is a crucial technology for creating strong, high-quality metal parts, especially for industries like aerospace and automotive. It allows for joining dissimilar materials and building complex geometries with minimal distortion. This patent aims to improve the precision and control of the material deposition process, which can lead to even better weld quality and expanded applications for this manufacturing technique. ### What does this patent NOT cover? Does not cover friction stir manufacturing devices that do not include a deposition head with both a first and second semi-cylindrical portion. **Full plain-English explainer:** https://patentbrief.org/patent/us/12734604/deposition-head-for-friction-stir-additive-manufacturing-devices-and-methods **Original patent:** https://patents.google.com/patent/US12734604 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [Building Metal Parts Without Melting: Solid-State 3D Printing System](https://patentbrief.org/patent/us/11311959/solid-state-additive-manufacturing-system-and-material-compositions-and-structur) — This patent describes a system for building or repairing metal parts by frictionally heating and stirring materials together without melting them, precisely controlling the material's internal structure as it's made. - [How to Precisely Control Solid-State 3D Printing for Stronger Materials](https://patentbrief.org/patent/us/20240109245/process-control-systems-and-methods-using-a-solid-state-additive-manufacturing-s) — This patent describes a system for precisely controlling solid-state additive manufacturing, allowing real-time adjustments to create specific material structures without melting, using continuous material feeds. - [How to Improve 3D Printing Using Cold Spray Metal Deposition](https://patentbrief.org/patent/us/12233456/mars-colonial-transporter-architecture) — A method for perfecting metal 3D printing by analyzing how spray angles affect material quality and adjusting the printer's path to fix errors. - [How to 3D Print Metal Parts with Easy-to-Remove Supports](https://patentbrief.org/patent/us/12358049/interface-layers-for-removable-supports) — This patent describes a method for 3D printing complex metal objects with support structures that can be easily removed after the final part is made solid, by using a special non-stick layer in between. - [3D Printing Conductive Plastics Without Melting Them](https://patentbrief.org/patent/us/12233592/solid-state-additive-manufacturing-methods-for-compounding-conductive-polymer-co) — This patent describes a method for 3D printing objects and coatings from conductive plastics by mixing polymer and conductive fillers in a solid-state process, rather than melting them, to create parts that can conduct electricity or heat.