Process for producing metal/metal foam composite components
View Patent ↗The invention relates to a process for producing metal/metal foam composite components, wherein a flat or shaped metal part is introduced into the cavity of a die, the cavity being at least partially delimited by the metal part, and then a mixture comprising a metal melt and a blowing agent which is solid at room temperature is introduced into the cavity, where it is foamed.
1. A process for producing a metal/metal foam composite component, wherein said metal/metal foam composite component comprises a flat or shaped metal part and a metal foam, in a high pressure injection die-casting machine comprising a die cavity, said method comprises placing the flat or shaped metal part into the die cavity so that the flat or shaped metal part at least partially delimits the die cavity; and forming a mixture comprising a metal melt and a blowing agent, which is solid at room temperature, in the die cavity, where the foaming takes place.
2. The process according to claim 1 , wherein the die cavity is filled or underfilled with a defined volume and the foaming takes place in an unheated die cavity.
3. The process according to claim 1 , wherein the mixture comprising the metal melt and the blowing agent is formed before introducing the mixture to the die cavity.
4. The process according to claim 3 , wherein the die-casting machine further comprises a shot sleeve or a shot chamber and the mixture comprising the metal melt and the blowing agent is formed in the shot sleeve or shot chamber and is then introduced to the die cavity.
5. The process according to claim 1 , wherein the die cavity is filled with the mixture comprising the metal melt and the blowing agent before foaming said mixture.
6. The process according to claim 1 , wherein flat or shaped metal part delimits the die cavity on only one side.
7. The process according to claim 1 , wherein the die casting machine further comprises more than one shot runners and the die cavity comprises more than one independent space, said spaces being filled by said shot runners.
8. The process according to claim 1 , wherein the metal melt comprises a light metal.
9. The process according to claim 8 , wherein the light metal is aluminum or aluminum alloy.
10. The process according to claim 8 , wherein the light metal is Mg or Mg alloy.
11. The process according to claim 1 , wherein the blowing agent is a metal hydride.
12. The process according to claim 11 , wherein the metal hydride is a light metal hydride.
13. The process according to claim 12 , wherein the light metal hydride is magnesium hydride or titanium hydride.
14. The process according to claim 1 , wherein the blowing agent is autocatalytically produced magnesium hydride.
15. The process according to claim 1 , wherein the process is a cold-chamber process.
16. The process according to claim 1 , wherein the process is a hot-chamber process.