Method for producing a porous shaped body

Patent metadata

Field	Value
Publication number	US-2017157672-A1
Application number	US-201615373190-A
Country	US
Kind code	A1
Filing date	Dec 8, 2016
Priority date	Dec 8, 2015
Publication date	Jun 8, 2017
Grant date	—

Abstract

A method for producing a porous shaped body may include providing a mixture of a powder including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture. The method may then include introducing the mixture by core shooting into a cavity formed in a forming tool, and solidifying the mixture in the forming tool to give a shaped body. The method may then include heating the shaped body to remove at least one of organic constituents and gases present in the shaped body. The method may further include resolidifying the shaped body by a sintering operation.

First claim

1 . A method for producing a porous shaped body, comprising:
providing a mixture of a powder, including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture; introducing the mixture by core shooting into a cavity formed in a forming tool; solidifying the mixture in the forming tool to give a shaped body; heating the shaped body to remove at least one of organic constituents and gases present in the shaped body; and resolidifying the shaped body by a sintering operation.

2 . A method according to claim 1 , wherein the resin/activator mixture has between 0.5 wt % and 5 wt % of a total weight of the mixture.

3 . A method according to claim 1 , wherein introducing the mixture takes place fluid-dynamically using a pressurized gas.

4 . A method according to claim 3 , wherein the pressurized gas includes one of compressed air, nitrogen, and argon.

5 . A method according to claim 1 , wherein solidifying the mixtures takes place by introduction of at least one reactive gas into the forming tool.

6 . A method according to claim 5 , wherein the reactive gas includes amide.

7 . A method according to claim 1 , wherein the shaped body is heated to a temperature between 25° C. and 700° C.

8 . A method according to claim 1 , wherein heating the shaped body takes place in one of a neutral, an oxidizing, and a reducing atmosphere.

9 . A method according to claim 1 , wherein the sintering operation takes place in one of a reducing, a carbonizing, and a neutral atmosphere.

10 . A method according to claim 1 , wherein, during or after solidifying the mixture, no mechanical pressure is exerted on the shaped body as it forms.

11 . A porous shaped body produced by a method comprising:
providing a mixture of a powder including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture; introducing the mixture by core shooting into a cavity formed in a forming tool; solidifying the mixture in the forming tool to give a shaped body; heating the shaped body to remove at least one of organic constituents and gases present in the shaped body; and resolidifying the shaped body by a sintering operation.

12 . A porous shaped body according to claim 11 , wherein the shaped body is designed as a component of one of a filter and a cylinder liner.

13 . A porous shaped body according to claim 11 , wherein the resin/activator mixture has between 0.5 wt % and 5 wt % of a total weight of the mixture.

14 . A method according to claim 2 , wherein introducing the mixture takes place fluid-dynamically using a pressurized gas.

15 . A method according to claim 14 , wherein the pressurized gas includes one of compressed air, nitrogen, and argon.

16 . A method according to claim 2 , wherein solidifying the mixtures takes place by introduction of at least one reactive gas into the forming tool.

17 . A method according to claim 16 , wherein the reactive gas includes amide.

18 . A method comprising:
providing a mixture of a powder including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture; core shooting the mixture into a cavity formed in a forming tool via a pressurized gas; introducing at least one reactive gas into the forming tool to solidify the mixture in the forming tool into a shaped body; heating the shaped body to a temperature between 25° C. and 700° C. to remove at least one of organic constituents and gases present in the shaped body; and resolidifying the shaped body by a sintering operation.

19 . A method according to claim 18 , wherein the pressurized gas includes one of compressed air, nitrogen, and argon.

20 . A method according to claim 18 , wherein the reactive gas includes amide.

Assignees

• Mahle Int Gmbh

Inventors

• Ruch Roland
• Scholl Roland
• Sutter Patrick
• Wintrich Klaus

Classifications

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title

• B22F1/103

  containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent · CPC title

• B22F3/1143 Primary

  involving an oxidation, reduction or reaction step · CPC title

• B22F2301/35

  Iron · CPC title

• B22F3/1021 Primary

  Removal of binder or filler (removal of binder from ceramics C04B35/638) · CPC title