DE19747552C2 - Device for hot pressing fluorescent ceramics - Google Patents
Device for hot pressing fluorescent ceramicsInfo
- Publication number
- DE19747552C2 DE19747552C2 DE1997147552 DE19747552A DE19747552C2 DE 19747552 C2 DE19747552 C2 DE 19747552C2 DE 1997147552 DE1997147552 DE 1997147552 DE 19747552 A DE19747552 A DE 19747552A DE 19747552 C2 DE19747552 C2 DE 19747552C2
- Authority
- DE
- Germany
- Prior art keywords
- insert
- hot pressing
- high temperature
- ceramic
- fluorescent ceramics
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/022—Moulds for compacting material in powder, granular of pasta form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0097—Press moulds; Press-mould and press-ram assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Luminescent Compositions (AREA)
- Ceramic Products (AREA)
Description
In der Röntgentechnik, insbesondere in der Computertomogra phie, werden Detektoren aus Leuchtstoffkeramik auf der Basis von Gadoliniumoxidsulfiden verwendet. Es ist bekannt, in ei ner zylindrischen Preßmatrize einen zylindrischen Keramik körper heiß zu pressen (DE 42 24 931 C2, US 5 518 659). Bei der Weiterverarbeitung des resultierenden zylindrischen Kera mikrohlings wird dieser in Scheiben geschnitten und zu meist rechtwinkligen Einzelteilen verschiedener Größen zugeschnit ten. Bei größeren rechtwinkligen Zuschnitten ist die Ausnut zung des erzeugten Keramikvolumens bedingt durch die anfal lenden Reststücke (Kreissegmente) schlecht.In X-ray technology, especially in computer tomography phie, fluorescent ceramic detectors are based used by gadolinium oxide sulfides. It is known in egg ner cylindrical press die a cylindrical ceramic pressing the body hot (DE 42 24 931 C2, US 5 518 659). At the further processing of the resulting cylindrical kera micro blanks this is cut into slices and mostly right-angled individual parts of different sizes The groove is for larger right-angled blanks of the ceramic volume generated due to the beginning leftover remnants (circular segments) bad.
In der DE 22 48 946 ist eine Preßvorrichtung mit einer hohlzylindrischen Preßmatrize beschrieben, die einen Einsatz aus hochtemperaturfestem Material enthält. Dessen Innen-Hohl raum ist wie die Preßmatrize selbst hohlzylindrisch. Außerdem sind Preßmatrizen beschrieben, die einen Einsatz aus hochtem peraturfestem Material mit rechtwinkligem Innen-Hohlraum auf weisen, wobei in diesem Fall die Preßmatrize nicht hohlzylin drisch, sondern ebenfalls von rechtwinkligem Querschnitt ist.DE 22 48 946 is a pressing device with a hollow cylindrical press die described an insert made of high temperature resistant material. Its inner hollow Like the die, space itself is hollow cylindrical. Moreover press dies are described, which use an insert from high temperature-resistant material with a rectangular inner cavity point, in which case the press die is not hollow cylin drisch, but also of rectangular cross section.
Die DE-OS 16 83 953 betrifft Preßvorrichtungen, bei denen hochtemperaturfeste Materialien, z. B. Porzellan, Metall oder Sintermetall, Verwendung finden.DE-OS 16 83 953 relates to pressing devices in which high temperature resistant materials, e.g. B. porcelain, metal or Sintered metal, are used.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so auszubilden, daß die Ausnutzung des Volumens des Keramikrohlings gegenüber dem Stand der Technik verbessert ist. The invention has for its object a device of the type mentioned in such a way that the utilization of the volume of the ceramic blank compared to the state of the Technology is improved.
Diese Aufgabe ist erfindungsgemäß gelöst durch die Merkmale des Patentanspruchs 1. Bei der Erfindung ist in der Preß matrize ein Segment aus einem hochtemperaturfesten Material eingesetzt, das rechteckigen oder quadratischen Querschnitt hat. Dadurch kann wegen der rechtwinkligen Form der aus dem Rohling herausgeschnittenen Teile das Gesamtvolumen besser ausgenutzt werden, d. h., es wird Ausgangsmaterial eingespart. Ferner werden die Zuschneidezeiten verkürzt und die Entsor gungskosten und Abfallmengen reduziert. Durch das Einsetzen eines Segments aus hochtemperaturfestem Material bleibt die Druckstabilität der zylindrischen Matrize erhalten, was bei Vollmatrizen mit entsprechenden Innengeometrien nicht der Fall ist. Dort treten an den Innenecken Sollbruchstellen auf. Durch die geometrische Gestaltung der eingesetzten Segmente können Keramikrohlinge an die spätere Zuschneidegeometrie an gepaßt werden.According to the invention, this object is achieved by the features of claim 1. In the invention is in the press die a segment of a high temperature resistant material used, the rectangular or square cross section Has. This can because of the rectangular shape from the Blank cut out parts better the total volume be exploited, d. that is, raw material is saved. Furthermore, the cutting times are shortened and the disposal costs and waste quantities reduced. By inserting of a segment made of high temperature resistant material Preservation of pressure of the cylindrical die, what at Solid matrices with the corresponding internal geometries are not Case is. There predetermined breaking points occur at the inner corners. Due to the geometric design of the segments used can adapt ceramic blanks to the later cutting geometry be fitted.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is based on one in the drawing illustrated embodiment explained in more detail.
In der Zeichnung ist eine hohlzylindrische Hülse 1 darge stellt, in der ein Einsatz 2 aus hochtemperaturfestem Mate rial eingesetzt ist. Der Einsatz 2 kann z. B. aus Graphit, Keramik (Aluminiumoxid, Siliziumkarbid, Zirkonoxid oder ähn lichem) oder aus einem hochtemperaturfestem Metall bestehen. Er kann, wie durch die gestrichelten Linien 3 angedeutet, auch aus zwei Hälften oder vier Einzelteilen bestehen, also aus vier Einzelsegmenten. Der Leuchtstoff-Keramikrohling wird senkrecht zur Zeichenebene durch die dargestellte Preßmatrize 1, 2 hindurchgepreßt und hat einen quadratischen Querschnitt. Auch ein rechteckiger Querschnitt ist möglich. Aus dem so entstandenen Keramikrohling mit Prismenform werden Scheiben abgeschnitten und aus diesen dann Einzelteile zugeschnitten, indem jede Scheibe in mehrere rechtwinklige Einzelteile un terteilt wird. Jedes dieser Einzelteile ist für einen Detek tor als Leuchtstoffkeramik vorgesehen.In the drawing, a hollow cylindrical sleeve 1 is Darge, in which an insert 2 made of high-temperature-resistant mate rial is used. The insert 2 can e.g. B. made of graphite, ceramic (aluminum oxide, silicon carbide, zirconium oxide or similar) or made of a high temperature resistant metal. As indicated by the dashed lines 3 , it can also consist of two halves or four individual parts, that is to say four individual segments. The fluorescent ceramic blank is pressed perpendicular to the drawing plane through the press die 1 , 2 shown and has a square cross section. A rectangular cross section is also possible. Discs are cut from the resulting ceramic blank with a prism shape and then cut into individual parts by dividing each disc into several right-angled individual parts. Each of these items is provided for a detector as a phosphor ceramic.
Werkstoffe für die Hülse 1 können z. B. Aluminiumoxid, Graphit, Siliciumcarbid, Kohlenfaserverstärker-Graphit sein.Materials for the sleeve 1 can, for. B. alumina, graphite, silicon carbide, carbon fiber graphite.
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997147552 DE19747552C2 (en) | 1997-10-28 | 1997-10-28 | Device for hot pressing fluorescent ceramics |
JP30240498A JPH11226927A (en) | 1997-10-28 | 1998-10-23 | Hot press for light emitting ceramics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997147552 DE19747552C2 (en) | 1997-10-28 | 1997-10-28 | Device for hot pressing fluorescent ceramics |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19747552A1 DE19747552A1 (en) | 1999-05-06 |
DE19747552C2 true DE19747552C2 (en) | 2000-12-21 |
Family
ID=7846856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997147552 Expired - Lifetime DE19747552C2 (en) | 1997-10-28 | 1997-10-28 | Device for hot pressing fluorescent ceramics |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH11226927A (en) |
DE (1) | DE19747552C2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4829268B2 (en) * | 2008-04-08 | 2011-12-07 | 日本特殊陶業株式会社 | Manufacturing method of ceramic |
KR101209731B1 (en) * | 2010-09-17 | 2012-12-07 | 현대자동차주식회사 | Control system and method for hybrid vehicle |
CN106113229B (en) * | 2016-06-28 | 2018-08-14 | 中国路桥工程有限责任公司 | Railway T-shaped beam prefabricated form device and its installation, release method |
CN106738210A (en) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | A kind of mould and the method using Making mold GOS scintillating ceramics |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1683953A1 (en) * | 1967-09-25 | 1970-12-03 | Reuben Shemia Naim | Press form made of porous sintered metal, porous plastic or porcelain for clay, ceramic and porcelain mass |
DE2248946A1 (en) * | 1971-10-07 | 1973-04-12 | Alusuisse | HOT PRESSING DEVICE |
DE4224931C2 (en) * | 1992-07-28 | 1995-11-23 | Siemens Ag | Process for producing a scintillator ceramic and its use |
US5518659A (en) * | 1994-01-26 | 1996-05-21 | Siemens Aktiengesellschaft | Method for manufacturing a phosphor having high translucency |
-
1997
- 1997-10-28 DE DE1997147552 patent/DE19747552C2/en not_active Expired - Lifetime
-
1998
- 1998-10-23 JP JP30240498A patent/JPH11226927A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1683953A1 (en) * | 1967-09-25 | 1970-12-03 | Reuben Shemia Naim | Press form made of porous sintered metal, porous plastic or porcelain for clay, ceramic and porcelain mass |
DE2248946A1 (en) * | 1971-10-07 | 1973-04-12 | Alusuisse | HOT PRESSING DEVICE |
DE4224931C2 (en) * | 1992-07-28 | 1995-11-23 | Siemens Ag | Process for producing a scintillator ceramic and its use |
US5518659A (en) * | 1994-01-26 | 1996-05-21 | Siemens Aktiengesellschaft | Method for manufacturing a phosphor having high translucency |
Also Published As
Publication number | Publication date |
---|---|
JPH11226927A (en) | 1999-08-24 |
DE19747552A1 (en) | 1999-05-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8120 | Willingness to grant licences paragraph 23 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
R081 | Change of applicant/patentee |
Owner name: SIEMENS HEALTHCARE GMBH, DE Free format text: FORMER OWNER: SIEMENS AKTIENGESELLSCHAFT, 80333 MUENCHEN, DE |
|
R071 | Expiry of right |