Method and Device for Coaxially Extruding an Extruded Product

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This invention introduces a method and corresponding device for coaxially extruding a product composed of at least two different materials. Using a custom extruder with two coaxially aligned bores and separately controlled punches, distinct material billets are pressed simultaneously into a shared mold cavity. This process ensures the resulting extruded product has one material core surrounded seamlessly by another, with both materials integrally bonded both form-fit and structurally within the mold.

Use CasesContent extracted from patent full text and abstract with AI.

• Manufacturing hybrid metal or multi-material profiles (such as tubes, rods, and structural elements) for automotive, aerospace, rail, energy, or construction applications.
• Producing lightweight structures with tailored strength, stiffness, or corrosion properties, where different materials are needed in different zones of a component.
• Creation of customized and load-adapted profiles for machinery, vehicles, or medical implants.
• Fabrication of multi-metal conductors, pipes, or casings with specific electromagnetic or thermal properties.
• Production of specialized extrusion products such as window frames, heat exchangers, or architectural elements with hybrid functionality.

BenefitsContent extracted from patent full text and abstract with AI.

• Allows precise manufacturing of hybrid extruded components with seamlessly bonded material interfaces.
• Enables independent control of material flow rates for each material, improving process flexibility and adaptability to varying material properties.
• Facilitates the production of profiles with adjustable material ratios or gradient structures, optimizing weight and performance for specific engineering requirements.
• Can reduce component weight while maintaining or improving mechanical strength and function.
• Potentially eliminates the need for secondary joining or assembly operations, reducing production time and cost.
• Enhances product reliability and homogeneity by reducing weak points at material interfaces compared to conventional joining processes.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a method for coaxially extruding an extruded product. To this end, an extruding device has the following: a receiver (7); a first receiver bore (5) which is formed in the receiver (7) and in which a first punch (10) is arranged; a second receiver bore (6) which is formed in the receiver (7) inside the first receiver bore (5) and coaxially thereto and in which a second punch (11) is arranged; and a mould (15) having a mould cavity (14) which is connected to the first and the second receiver bore (5, 6). In the method, the following is provided: arranging a first material billet (8) of a first material (2) in the first receiver bore (5); arranging a second material billet (9) of a second material (3) in the second receiver bore (6); and extruding an extruded product (1) in which the first and the second material (2, 3) are connected in a form-fitting and integrally bonded manner. The extrusion comprises: advancing the first punch (10) in the first receiver bore (5) in such a way that the first material (2) is pressed into the mould cavity (14) of the mould (15) and thereby shaped; advancing the second punch (11) in the second receiver bore (6) in such a way that the second material (3) is pressed into the mould cavity (14) of the mould (15) and thereby shaped, the second punch (11) being displaced coaxially to the first punch (10); and connecting the first and the second material in an integrally bonded and form-fitting manner to form an extruded product (1) in the mould (15) in such a way that the first material (2) surrounds the second material (3) in the extruded product (1). The invention also relates to a device for coaxially extruding an extruded product.