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    IMPACT EXTRUSION METHOD, TOOLING AND PRODUCT
    1.
    发明公开
    IMPACT EXTRUSION METHOD, TOOLING AND PRODUCT 审中-公开
    冲击挤压方法，工具和产品

    公开(公告)号：EP3240646A1

    公开(公告)日：2017-11-08

    申请号：EP15874439.1

    申请日：2015-12-29

    申请人： Montebello Technology Services Ltd. ,  1949467 Ontario Inc.

    发明人： PILON, Betty, Jean ,  STATHOPOULOS, Peter ,  GEORGIEV, Georgi ,  PILON, Benjamin, Joseph

    IPC分类号： B21C23/18 ,  B21C25/08 ,  B21D51/26

    CPC分类号： B21C23/18 ,  B21C23/186 ,  B21C25/04 ,  B21C26/00 ,  B21D26/049

    摘要： A hollow preform impact extruded from a metal billet to produce a progressing wall at a transition wall thickness. An axially forward portion of the progressing wall is ironed by extrusion past an extrusion point to form a sidewall portion of a lesser thickness. Extruding is stopped while some of the billet remains to form the closed bottom end. The preform has a bottom portion, a sidewall portion and a transition wall portion extending between the bottom portion and the sidewall portion. The transition wall portion is thicker than the sidewall portion and can be formed into at least part of the rim of an expansion shaped container. An impact extrusion punch has a central axis, an axially forward, impact surface for impacting metal to be extruded, a transition region for directing material displaced by the impact surface and a rear extrusion point for ironing material extruded past the transition region.

    Verfahren und Vorrichtung zur Herstellung von Fliesspresserzeugnissen
    3.
    发明公开
    Verfahren und Vorrichtung zur Herstellung von Fliesspresserzeugnissen 审中-公开

    公开(公告)号：EP1125651A1

    公开(公告)日：2001-08-22

    申请号：EP00810141.2

    申请日：2000-02-18

    申请人： SM Schweizerische Munitionsunternehmung

    发明人： Schuler, Walter ,  Aschwander, Ernst ,  Weidig, Ursula, Dr. ,  Steinhoff, Kurt, Dr.-Ing.

    IPC分类号： B21C23/18

    CPC分类号： B21D26/033 ,  B21C23/18 ,  B21D45/06

    摘要： Die Erfindung bezieht sich auf Verfahren und eine Vorrichtung zur Herstellung von Presserzeugnissen und zum Bearbeiten eines Blocks (1) aus fliessfähigem Werkstoff, der in einen Aufnehmer (2) einbringbar und mittels eines Fliesspressstempels (3) umformbar ist, wobei der Fliesspressstempel (3) eine Einrichtung aufweist, mittels der er nach dem Umformvorgang aus seiner Arbeitsstellung und/oder Arbeitsendlagestellung zumindest leichter in seine Arbeitsanfangsstellung verstellbar ist.

    摘要翻译： 该方法包括将工件（1）插入容器（2）并使用挤压印模（3）。 在成形过程之后，在挤压印模上，在加工步骤之后，在其工作位置或其结束位置施加压力补偿步骤。 在加工步骤之前，压力补偿步骤在该位置比在挤压机的起始位置更容易调节。 包括用于实现该方法的设备的独立声明。

    VARIABLE-THICKNESS EXTRUSION METHOD AND EXTRUSION UNIT IN ACCORDANCE WITH SAID METHOD
    6.
    发明公开
    VARIABLE-THICKNESS EXTRUSION METHOD AND EXTRUSION UNIT IN ACCORDANCE WITH SAID METHOD 失效
    方法和设备产品中变截面挤压

    公开(公告)号：EP0889763A1

    公开(公告)日：1999-01-13

    申请号：EP97915464.0

    申请日：1997-03-26

    申请人： Fiocchi Munizioni Spa

    发明人： GANDINI, Angelo

    IPC分类号： B21C23 ,  B21K21

    CPC分类号： B21C23/03 ,  B21C23/18 ,  B21C23/20 ,  B21K21/08

    摘要： A cold impact extrusion method for hollow metal elements, in particular cartridge cases, comprises the steps of placing a slug or blank in a die, pressing the blank within the die between a punch and counter-punch facing each other, during compression moving the punch forward in the die at a first velocity and moving the counter-punch backward at a second velocity slower than the first one, so as to reduce the distance between the punch and counter-punch. During movement, the punch head is caused to pass through die areas having different distances from the punch sides so as to identify an extrusion annulus of variable width between the die and punch. An extrusion unit for applying the method comprises a punch (11, 111, 211) and a counter-punch (12, 112, 212) facing each other and coaxially movable within a die (13, 113, 213) to identify an extrusion chamber (14, 114, 214) therebetween, which has a variable transverse size along the punch and counter-punch movement axis.