EP1227908A1 - Method and device for producing reticular structures - Google Patents
Method and device for producing reticular structuresInfo
- Publication number
- EP1227908A1 EP1227908A1 EP00958218A EP00958218A EP1227908A1 EP 1227908 A1 EP1227908 A1 EP 1227908A1 EP 00958218 A EP00958218 A EP 00958218A EP 00958218 A EP00958218 A EP 00958218A EP 1227908 A1 EP1227908 A1 EP 1227908A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- refractory
- fire
- refractory material
- molten metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 239000006260 foam Substances 0.000 claims abstract description 23
- 229920001247 Reticulated foam Polymers 0.000 claims abstract description 5
- 239000011819 refractory material Substances 0.000 claims description 15
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 230000009970 fire resistant effect Effects 0.000 abstract 5
- 238000000465 moulding Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010120 permanent mold casting Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
Definitions
- the invention relates to a method for the production of grid mesh structures, in particular for the production of metallic grid mesh structures, and a device suitable therefor.
- Reticular structures made of metal and other materials have a wide range of applications.
- these structures can be used as low weight components, battery plates, electrochemical anodes and cathodes, filters for fluids, separators for fluid media, heat shields and for numerous other applications.
- U.S. Patent 3,616,841 which is considered the closest prior art, discloses a method of making an insoluble foam material having a predetermined reticulated structure. This process involves the production of a self-supporting reticulated polyurethane foam; the production of a refractory mass by filling the cavities of the polyurethane foam with an aqueous gypsum suspension and this Sus pension binds; heating the refractory mass to a temperature of about 120 ° C (250 ° F) over a period of two hours; creating voids in the refractory molding material by raising the temperature of the refractory molding material to 535 to 815 ° C (1000 to 1500 ° F) to volatilize all of the foam; introducing a molten substance consisting of metals, metal alloys, ceramics or cerment into the refractory molding compound, the amount of the substance being sufficient to fill the cavities previously occupied by the reticulated structure; and solidifying the molten substance by lowering
- the melting of the substance, which is introduced into the refractory molding compound, requires a great deal of equipment, particularly in the case of refractory metals, or cannot be achieved technologically.
- the structure of the foam is determined by the connection of the foams to the wax plates.
- the foam structure determines the technical parameters of the end product, so that the statistical fluctuation range must be as small as possible to ensure that the technical parameters of the end product are reached.
- US 3,616,841 proposes various cooling methods, such as spraying with water or air.
- the cooling effect is weakened considerably, however, since the molding compound hinders the heat flow changed.
- the production of massive metal areas together with the grid structure is associated with the problem of very slow cooling.
- the specified process steps hardly or not permit controlled solidification of the metal in order to obtain a void-free and fine-grained structure.
- the slow solidification of the metal leads to long process times, which also stand in the way of automated production.
- step (1) can be followed by modification of the surface of the foam pre-structure. This is preferably done by roughening or structuring the surface of the foam pre-structure.
- the metal melt can be filled into the heat-resistant container (step (7)) by means of pressure support or vacuum support.
- step (8) the grid structure obtained can be cleaned and, if necessary, modified by coating the grid structure, for example.
- the method according to the invention offers several advantages. It is no longer necessary to glue the foam pre-structure to the pouring system and the pouring funnel. This significantly reduces the material and time used in the manufacture of the mold. Furthermore, the source of error associated with the uncontrollable gluing process is eliminated, since large areas of the foam pre-structure have no connection to the pouring system. Only the amount of refractory material needed to make the grid structure is required. The foam pre-structure protrudes from the fireproof molding compound after removal from the molding container. This makes it easy to check whether, after the foam pre-body has evaporated, all the webs and cells have a sufficiently good connection to the outside to ensure a complete cast.
- the accessibility of the foam pre-structure from all sides has the advantage that the refractory mold can be heated without delay and that free access to the webs and cells of the foam pre-structure enables accelerated volatilization of the foam pre-structure. After volatilization, it is also very easy to check whether sufficient webs maintain the molten metal's access to the internal structure, the "negative form". Since the refractory material is preheated before it is placed in the refractory container, the molten metal solidifies from the outside This means that the temperature of the container and the refractory material can be controlled by cooling the molten metal without voids.
- the refractory container has at least one opening for pouring the molten metal into the refractory material.
- the interior of the container is preferably larger than the refractory, preheated material.
- a freely selectable space is created between the container wall and the body made of refractory material, so that an arbitrarily shaped, massive wall can be cast onto the grid structure.
- This wall is in direct contact with the container wall, so that the heat of solidification from the cast metal can be dissipated directly into the container wall and a fine-grained casting structure is created.
- the webs of the grid structure are optimally connected to the solid wall.
- the foundry mesh structures obtained by the process according to the invention using the refractory container can be integrated into castings which can be produced using various casting processes such as die casting, permanent mold casting, centrifugal casting, low pressure casting or counter pressure casting.
- the Gittemetz structures themselves can also be cast using these methods.
- the process enables the production of grid mesh structures of various fineness in terms of web thickness and cell size. Combinations of different cell sizes and web thicknesses in one body are also possible.
- the method can be carried out continuously, since the wax plates required for bonding the foam pre-structure in the prior art methods are dispensed with.
- Any material that has a sufficient number of pores can be used as the foam pre-structure.
- This material is preferably polyurethane foam.
- Gypsum is preferably used as the refractory material.
- the molten metal consists of metals, metal alloys, ceramics or metal ceramics. However, any castable material can be used.
- the metallic grid mesh structures obtained by the invention can be used, for example, as catalysts, for EMC shielding and in batteries.
- a Zn / Cu alloy is used as the metal melt for the production of a catalyst for stabilizing the combustion of diesel fuel, with which the refractory material is filled.
- Gittemetz structures obtained from the invention which consist of aluminum and which are coated with lead after step (8), can be used in batteries, for example.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Filtering Materials (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939155 | 1999-08-20 | ||
DE19939155A DE19939155A1 (en) | 1999-08-20 | 1999-08-20 | Production of metallic lattice network structure comprises inserting foam pre-structure into container, infiltrating with refractory material, and solidifying |
PCT/DE2000/002597 WO2001014086A1 (en) | 1999-08-20 | 2000-08-04 | Method and device for producing reticular structures |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1227908A1 true EP1227908A1 (en) | 2002-08-07 |
EP1227908B1 EP1227908B1 (en) | 2003-10-29 |
Family
ID=7918788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00958218A Expired - Lifetime EP1227908B1 (en) | 1999-08-20 | 2000-08-04 | Method for producing metallic reticular structures |
Country Status (9)
Country | Link |
---|---|
US (1) | US6857461B2 (en) |
EP (1) | EP1227908B1 (en) |
JP (1) | JP2003507192A (en) |
AT (1) | ATE252956T1 (en) |
AU (1) | AU6982700A (en) |
CA (1) | CA2381843C (en) |
DE (2) | DE19939155A1 (en) |
ES (1) | ES2209965T3 (en) |
WO (1) | WO2001014086A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010112393A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | Improved heat exchanger |
WO2010112392A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | 3 d heat exchanger |
WO2011051106A1 (en) | 2009-10-29 | 2011-05-05 | Nv Bekaert Sa | Manufacturing heat exchanger from porous medium and conduits |
WO2011144417A1 (en) | 2010-05-20 | 2011-11-24 | Nv Bekaert Sa | 3d porous material comprising machined side |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10257942A1 (en) * | 2002-12-12 | 2004-06-24 | Krauss-Maffei Wegmann Gmbh & Co. Kg | Protection module for protection against hollow charges includes layer sequence of three-dimensional metal grid structure or open-pore metal foam and air layers |
DE10340681B4 (en) * | 2003-09-04 | 2006-09-28 | M.Pore Gmbh | Process for producing a cohesive, heat-conducting connection between an open-pored foam structure and a non-porous body for heat exchangers, in particular a heat sink |
DE102004026959B3 (en) * | 2004-06-02 | 2006-02-16 | Girlich, Dieter, Dr. | Process for producing metallic lattice structures |
DE102005037141A1 (en) * | 2005-08-06 | 2007-02-08 | Syntan Gbr(vertretungsberechtigter Gesellschafter Hr. Dr. Dieter Girlich, 01309 Dresden) | Spongy-metallic implant and method for its production |
KR20100089062A (en) * | 2007-10-25 | 2010-08-11 | 베카에르트 컴버스천 테크놀러지 비.브이. | Metallic porous body incorporated by casting into a heat exchanger |
EP2056037A1 (en) | 2007-10-30 | 2009-05-06 | Büchi Labortechnik AG | Heating, method for heating and laminating, electrostatic separator, spray drier, separating device and method for separating particles |
DE102007062302A1 (en) | 2007-12-21 | 2009-06-25 | Beru Ag | heater |
DE102009011763B4 (en) | 2009-03-04 | 2012-11-08 | Bpe International Dr. Hornig Gmbh | Process for producing an open-pore metallic lattice structure and lightweight material consisting thereof |
DE102009013058A1 (en) | 2009-03-16 | 2010-09-23 | Wolfgang Kollmann | Metal structure comprises a flat substrate made of non-conductive fibers, which form a cross-linked thread-structure, where the substrate is a non-woven and is metallized with a metal on one side |
DE102014118177A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Process for producing metallic moldings, metallic moldings and method for forming a component with a heat exchanger |
DE102014118178A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Method for producing a metallic structure |
US9789536B2 (en) | 2015-01-20 | 2017-10-17 | United Technologies Corporation | Dual investment technique for solid mold casting of reticulated metal foams |
US9789534B2 (en) | 2015-01-20 | 2017-10-17 | United Technologies Corporation | Investment technique for solid mold casting of reticulated metal foams |
US9737930B2 (en) * | 2015-01-20 | 2017-08-22 | United Technologies Corporation | Dual investment shelled solid mold casting of reticulated metal foams |
US10035174B2 (en) | 2015-02-09 | 2018-07-31 | United Technologies Corporation | Open-cell reticulated foam |
US9884363B2 (en) * | 2015-06-30 | 2018-02-06 | United Technologies Corporation | Variable diameter investment casting mold for casting of reticulated metal foams |
US9731342B2 (en) | 2015-07-07 | 2017-08-15 | United Technologies Corporation | Chill plate for equiax casting solidification control for solid mold casting of reticulated metal foams |
CN109513907A (en) * | 2018-11-07 | 2019-03-26 | 三峡大学 | A kind of preparation method of 20 four sides leptospira structure foamed aluminium |
CN110449563B (en) * | 2019-08-30 | 2020-11-10 | 西安交通大学 | Silicon carbide ceramic-nickel-based alloy composite material part and preparation method thereof |
CN112355277B (en) * | 2019-10-29 | 2022-02-08 | 沈阳铸造研究所有限公司 | High-melting-point Kelvin structure lattice metal and preparation method and application thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946039A (en) * | 1967-10-30 | 1976-03-23 | Energy Research & Generation, Inc. | Reticulated foam structure |
US3616841A (en) * | 1967-10-30 | 1971-11-02 | Energy Research And Generation | Method of making an inorganic reticulated foam structure |
US3996991A (en) * | 1973-11-13 | 1976-12-14 | Kubota, Ltd. | Investment casting method |
JPS5344427A (en) * | 1976-10-05 | 1978-04-21 | Kubota Ltd | Method to manufacture propellers by using extinguishable pattern |
JPS6340663A (en) * | 1986-08-05 | 1988-02-22 | Miyagawa Kasei Kogyo Kk | Casting device for current collector grid for lead storage battery |
JPS6384758A (en) * | 1986-09-29 | 1988-04-15 | Nippon Steel Corp | Production of complex casting |
-
1999
- 1999-08-20 DE DE19939155A patent/DE19939155A1/en not_active Withdrawn
-
2000
- 2000-08-04 DE DE50004277T patent/DE50004277D1/en not_active Expired - Lifetime
- 2000-08-04 WO PCT/DE2000/002597 patent/WO2001014086A1/en active IP Right Grant
- 2000-08-04 ES ES00958218T patent/ES2209965T3/en not_active Expired - Lifetime
- 2000-08-04 AT AT00958218T patent/ATE252956T1/en not_active IP Right Cessation
- 2000-08-04 JP JP2001518212A patent/JP2003507192A/en not_active Withdrawn
- 2000-08-04 CA CA002381843A patent/CA2381843C/en not_active Expired - Lifetime
- 2000-08-04 AU AU69827/00A patent/AU6982700A/en not_active Abandoned
- 2000-08-04 EP EP00958218A patent/EP1227908B1/en not_active Expired - Lifetime
-
2002
- 2002-02-20 US US10/079,331 patent/US6857461B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0114086A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010112393A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | Improved heat exchanger |
WO2010112392A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | 3 d heat exchanger |
WO2011051106A1 (en) | 2009-10-29 | 2011-05-05 | Nv Bekaert Sa | Manufacturing heat exchanger from porous medium and conduits |
US8875395B2 (en) | 2009-10-29 | 2014-11-04 | Universiteit Gent | Manufacturing heat exchanger from porous medium and conduits |
WO2011144417A1 (en) | 2010-05-20 | 2011-11-24 | Nv Bekaert Sa | 3d porous material comprising machined side |
Also Published As
Publication number | Publication date |
---|---|
EP1227908B1 (en) | 2003-10-29 |
ATE252956T1 (en) | 2003-11-15 |
DE50004277D1 (en) | 2003-12-04 |
AU6982700A (en) | 2001-03-19 |
CA2381843C (en) | 2009-01-27 |
ES2209965T3 (en) | 2004-07-01 |
US6857461B2 (en) | 2005-02-22 |
JP2003507192A (en) | 2003-02-25 |
CA2381843A1 (en) | 2001-03-01 |
US20020088598A1 (en) | 2002-07-11 |
DE19939155A1 (en) | 2001-02-22 |
WO2001014086A1 (en) | 2001-03-01 |
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