摘要:
Die Erfindung geht aus von einer Sintervorrichtung (10) zum Herstellen eines Werkstücks (30) aus zumindest einer Komponente mittels Drucksintern. Die Sintervorrichtung weist ein Oberwerkzeug (12) und ein Unterwerkzeug (14) auf, zwischen denen die zumindest eine Komponente aufgenommen ist. Das Oberwerkzeug (12) und das Unterwerkzeug (14) sind zum Aufbringen einer Presskraft auf das zu sinternde Werkstück (30) relativ zueinander verstellbar. Es ist zumindest einer Heizvorrichtung (18a, 18b) zum Erwärmen des zu sinternden Werkstücks (30) vorgesehen. Es wird vorgeschlagen, dass die Sintervorrichtung ferner zumindest eine Kühlvorrichtung (22a, 22b) in einem Oberwerkzeug (12) aufweist, die aktiv die Sintervorrichtung auf konstantere Temperatur hält. Denn beim Sinterpressvorgang heizt das heißere Unterwerkzeug unerwünscht das Oberwerkzeug auf und würde ohne die aktive und gesteuerte Kühlvorrichtung zur Überhitzung des oberen Sinterwerkzeuges führen. Des Weiteren ist ohne die Kühlvorrichtung keine konstante Temperaturhaltung bei kurzen Sintertaktvorgängen sicherzustellen.
摘要:
Setter plates are fabricated from Li-stuffed garnet materials having the same, or substantially similar, compositions as a garnet Li-stuffed solid electrolyte. The Li-stuffed garnet setter plates, set forth herein, reduce the evaporation of Li during a sintering treatment step and/or reduce the loss of Li caused by diffusion out of the sintering electrolyte. Li-stuffed garnet setter plates, set forth herein, maintain compositional control over the solid electrolyte during sintering when, upon heating, lithium is prone to diffuse out of the solid electrolyte.
摘要:
The object of the invention is a method of consolidation of powder materials by means of a device provided with a gastight operating chamber (1), a press connected (11) to a first electrode (3) and to a second electrode (6), wherein between the electrodes there is located in a die (4) the consolidated powder (5), wherein the press (11) exerts pressure on the consolidated powder with the first electrode (3) and the second electrode (6). To the first electrode (3) and the second electrode (6) there is connected a circuit comprising a power supply unit (9) so that the flow of current provided by the power supply unit (9) is closed through the first electrode (3) and the second electrode (6), and the consolidated powder (5). Simultaneously, the consolidated powder (5) is subjected to pressure and stimulated by current pulses. The voltage applied to the powder (5) in pulse peak fits within the range of 50 V to 900 V, and pulse duration is shorter than 300 ]is. The consolidation of powder (5) is performed in at least two steps. In the first step a pressure of the press (11) corresponding to pressure on the powder (5) within the range of 2 MPa to 15 MPa is applied, while the values of pulse current, pulse duty cycle and repetition frequency are chosen such that the temperature of the powder was constantly in the range of 0.05 do 0.3 of melting temperature of the powder. In the second step a pressure of the press (11) corresponding to pressure on the powder (5) within the range of 15 MPa to 200 MPa is applied, while the values of pulse current, pulse duty cycle and repetition frequency are chosen such that the temperature of the powder (5) was constantly in the range of 0.6 to 0.9 of melting temperature of the powder (5). Furthermore, the object of the invention is a device for consolidation of powder materials, provided with a gastight operating chamber (1), a press (11) connected to a first electrode (3) and to a second electrode (6), wherein between the electrodes there is located in a die (4) the consolidated powder (5), wherein the press (11) exerts pressure on the consolidated powder with the first electrode (3) and the second electrode (6), wherein to the first electrode (3) and the second electrode (6) there is connected a circuit comprising a power supply unit (9) and switching means so that the flow of current provided by the power supply unit (9) is closed through the first electrode (3) and the second electrode (6), the consolidated powder (5) and the switching means. Furthermore, the device is provided with a vacuum pump and means for measuring the temperature (8) of the consolidated powder. Furthermore, the voltage of the power supply unit (9) is within the range of 50 V to 900 V, and the switching means are configured to close the current flow path for a time shorter than 300 μs. A substance according to the invention is a result of consolidation of the substance comprising at least one of the group including A1203, SiC, Si3N4, WC, Ta, ReB2, Zr02, TiC, TiN using the method according to the invention.
摘要:
본 발명은 프레스 성형장치의 열판 구조 및 이를 이용한 연속 성형방법에 관한 것으로, 연속 성형방법에 있어서, 정해진 길이 단위(재단 폭)보다 작은 길이 단위로 1차 및 2차 겹침 성형작업을 연속적으로 수행함에 따라 경계부분이 상쇄되어 경계부분의 두께 단차를 개선할 수 있으며, 이로 인해 균일한 물성을 얻을 수 있도록 할 뿐만 아니라, 열판 구조에 있어서, 열판의 양측부를 챔버 밖으로 연장하여 돌출시킨 돌출부를 구성하되, 이 돌출부가 챔버 내의 열판 두께보다 얇은 두께로 구성함으로써, 동일한 시간 및 조건(압력, 온도 등)으로 성형작업이 수행되더라도 상기 돌출부에서는 챔버 내의 열판을 통해 가해지는 압력 및 온도보다 작은 압력 및 온도가 가해지게 되며, 이로 인한 공냉 및 온도제어 효과로 인해 상기와 같은 2차 겹침 성형작업을 통한 연속 작업 시, 시트 변형의 억제 및 기포를 제어할 수 있도록 하는, 프레스 성형장치의 열판 구조 및 이를 이용한 연속 성형방법에 관한 것이다.
摘要:
A method of extracting oil from oilseed comprising pressing seeds within a screw press including a screw auger rotatably mounted within a cylindrical expeller body, wherein the expeller body comprises a feed section, a compression section, and a discharge section, wherein at least one outlet is provided in the expeller body, preferably in or adjacent the feed section of the expeller, said method comprising the step of controlling the temperature of at least the compression section of the expeller by means such that the temperature of the material within the compression section does not exceed the glass transition temperature of the seeds.