De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freeze-casting

Patent metadata

Field	Value
Publication number	US-11458649-B2
Application number	US-201916397069-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	May 23, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

This invention provides a de-molding system of ceramic parts manufactured by freeze-casting comprising a mold (9), wherein the mold (9) comprises an upper opening (95) and a lower opening (94), wherein the upper opening (95) is adapted to receive a colloidal suspension (92), and one of the openings is adapted to allow the passage of a manufactured ceramic part (92), characterized by comprising at least one main de-molding element (80) adapted to actuate a ceramic part manufactured (92) through an opening in the mold (9).In addition, the invention provides a mold cooling system for the manufacturing of ceramic parts by freeze-casting comprising: a source (1) of cooling gas; a cooling gas cooling medium (7) fluidically connected to the cooling gas source (1); and a cooling cell (5), fluidly connected to the cooling gas cooling medium (7), comprising a mold (9) in its interior, wherein the cooling cell (5) comprises a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting comprising the stages of: refrigerating a cooling gas coming from a cooling gas source (1); and injecting a cooling gas that is refrigerated in a cooling cell (5) comprising a mold (9) in its interior.

First claim

The invention claimed is:

1. De-molding system of ceramic parts manufactured by freeze-casting comprising:
a mold ( 9 ), wherein the mold ( 9 ) comprises a first opening ( 95 ) at a first side of the mold ( 9 ) and a second opening ( 94 ) at a second side of the mold ( 9 ), opposite of the first side, wherein the first opening ( 95 ) is adapted to receive a colloidal suspension ( 92 ) in a first direction, and the second opening ( 94 ) is adapted to allow passage of a ceramic part, manufactured from the colloidal suspension ( 92 ), in the first direction;
a main de-molding element ( 80 ) provided in a second direction, opposite of the first direction, from the first side of the mold ( 9 ) that includes the first opening ( 95 ), the main de-molding element ( 80 ) adapted to actuate the ceramic part through the second opening ( 94 ) in the mold ( 9 ) in the first direction;
a central mold element ( 91 ) within the mold ( 9 ); and
a de-molding auxiliary element ( 81 ) provided in a first direction from the second side of the mold ( 9 ) that includes the second opening ( 94 ),
wherein the de-molding auxiliary element ( 81 ) is adapted to apply a force in the second direction to a side of the central mold element ( 91 ) in the first direction, while the main de-molding element ( 80 ) actuates the ceramic part in the first direction.

2. System according to claim 1 , characterized by the mold ( 9 ) comprising a cylindrical shape.

3. System according to claim 1 , wherein the main de-molding element ( 80 ) is adapted to slide in the first direction, between and relative to the mold ( 9 ) and the central mold element ( 91 ) while the de-molding auxiliary element ( 81 ) applies the force on the central mold element ( 91 ) in the second direction.

4. System according to claim 1 , characterized by comprising a sealing element ( 93 ) sealing the second opening ( 94 ) of the mold ( 9 ).

5. System according to claim 1 , characterized by the main de-molding element ( 80 ) being coupled to a mechanical-hydraulic system.

6. System according to claim 1 , characterized by the main de-molding element ( 80 ) comprising a tube shape, and the de-molding auxiliary element ( 81 ) comprising a pin shape, wherein the main de-molding element ( 80 ) is adapted to exert a downward vertical force ( 800 ), and the auxiliary de-molding element ( 81 ) is adapted to exert a vertical upward force ( 810 ).

7. System according to claim 1 , characterized by the mold ( 9 ) comprising a main tubular mold ( 90 ) comprising low thermal conductivity material and a metallic lower rod ( 96 ).

Assignees

• Petroleo Brasileiro S A —Petrobras
• Statoil Brasil Oleo E Gas Ltda
• Univ Federal De Minas Gerais—Ufmg
• Petroleo Bracileiro S A —Petrobras

Inventors

• Grava Wilson Mantovani
• Vasconcelos Wander Luiz
• Derks Peter Wilhelmus Jacques
• Do Nascimento Jailton Ferreira
• Nunes Eduardo Henrique Martins
• De Souza Douglas Fernandes
• Vasconcelos Daniela Cordeiro Leite

Classifications

• B28B1/007

  by freezing the material · CPC title

• B28B13/06

  Removing the shaped articles from moulds (by means incorporated in, or carried by, the moulds B28B7/10) · CPC title

• C04B35/00

  Shaped ceramic products characterised by their composition {(porous ceramic products C04B38/00; ceramic articles characterised by particular shape, see the relevant classes, e.g. linings for casting ladles, tundishes, cups or the like B22D41/02; ceramic substrates for microelectronic semi-conductors H10W70/692)}; Ceramics compositions ({shaping of ceramics B28B;} containing free metal bonded to carbides, diamond, oxides, borides, nitrides, silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides or sulfides other than as macroscopic reinforcing agents C22C); Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products {(infiltration of sintered ceramic preforms with molten metal C04B41/51; chemical preparation of powders of inorganic compounds C01)} · CPC title

• B28B17/0081 Primary

  Process control · CPC title

• B28B7/34 Primary

  Moulds, cores, or mandrels of special material, e.g. destructible materials (for slip casting B28B1/26) · CPC title