Method for the production of a structural component

Patent metadata

Field	Value
Publication number	US-12145195-B2
Application number	US-201916971369-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	May 15, 2018
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A method for producing a structural component having a foam structure formed by foaming a foamable material, includes the following steps: additively building a receiving component that reproduces the outer geometry of the structural component to be produced at least in some sections, in particular completely, and having a receiving space for receiving foamable material; introducing at least one foamable material into the receiving space of the receiving component; and carrying out at least one measure for foaming the foamable material introduced into the receiving space of the receiving component so as to form the foam structure.

First claim

What is claimed is:

1. A method for producing a structural component which comprises a foam structure formed by foaming of a foamable material, the method comprising the steps of:
additively building up a receiving component which replicates, at least in certain sections, an external geometry of the structural component to be produced and which comprises a receiving space for receiving foamable material;
introducing at least one foamable material into the receiving space of the receiving component, wherein at least one support structure permits a discharge of heat and prevents expansion of the receiving component;
implementing at least one measure for foaming the foamable material that has been introduced into the receiving space of the receiving component, so as to form the foam structure; and
using a surface-activation measure to create a connection between the foam structure and the receiving component, wherein
the at least one measure for foaming the at least one foamable material is implemented in a tool which comprises a temperature-controllable tool interior space, and
the at least one support structure negatively replicates, at least in certain sections, the external geometry of the receiving component and is introduced into the tool interior space.

2. The method according to claim 1 , wherein
the receiving component is formed in the manner of a casing.

3. The method according to claim 1 , wherein
the structural component is formed as an integral foam structural component which comprises an outer skin and a core enclosed by said outer skin, and
the receiving component forms the outer skin, and the foam structure forms the core of the integral foam structural component.

4. The method according to claim 1 , wherein
the foamable material is connected in a positively locking and/or cohesive fashion to the receiving component during the course of the implementation of the at least one measure for foaming the foamable material that has been introduced into the receiving space of the receiving component.

5. The method according to claim 1 , wherein
the support structure is formed by filling the tool interior space with a free-flowing or pourable support material such that the free-flowing or pourable support material surrounds, at least in certain sections, the receiving component that has been introduced into the tool interior space.

6. The method according to claim 1 , wherein
the receiving component is additively built up by a selective laser sintering process, a selective laser fusion process, a selective electron beam fusion process, a stereolithography process, or a binder jetting process.

7. The method according to claim 1 , wherein
the surface-activation measure is a corona or plasma treatment.

8. The method according to claim 1 , wherein
the receiving component is formed with at least one functional element which forms a part of a functional structure on the receiving component.

9. The method according to claim 8 , wherein one of:
the at least one functional element is formed as an opening which forms an inlet for a medium which initiates and/or assists a foaming process of the foamable material,
the at least one functional element is formed as an opening which forms an outlet for gaseous medium that is generated during a foaming process of the foamable material,
the at least one functional element is formed as a connector for a pressure-generating device which generates a particular pressure level within the receiving component,
the at least one functional element is formed as a reinforcement element which mechanically reinforces the receiving component at least in certain sections, or
the at least one functional element is formed as a support element which supports the receiving space at least in certain sections.

10. The method according to claim 1 , wherein
the receiving component is produced from a metal or from a plastic.

11. The method according to claim 10 , wherein
the metal or plastic is a pulverulent metal or plastic.

12. The method according to claim 1 , wherein
a chemically and/or physically foamable material is used.

13. The method according to claim 12 , wherein
the foamable material is a chemically and/or physically foamable metal or plastic material.

14. The method according to claim 1 , wherein
the structural component is formed as a motor vehicle component for installation in a motor vehicle.

15. The method according to claim 14 , wherein
the motor vehicle component is a paneling element.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Friedrich Martin
• Knorr Lukas

Classifications

• B29C44/10

  Applying counter-pressure during expanding · CPC title

• B22F3/1125

  involving a foaming process · CPC title

• B22F10/47

  characterised by structural features · CPC title

• B22F10/43

  characterised by material · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title