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1. 发明申请

WO1996029162A1 CONTINUOUS EXTRUSION APPARATUS 审中-公开
标题翻译：连续挤出装置
公开(公告)号：WO1996029162A1
公开(公告)日：1996-09-26
申请号：PCT/GB1996000648
申请日：1996-03-15
申请人： BWE LIMITED , CARTER, Edward, Purvis
发明人： BWE LIMITED
IPC分类号： B21C23/00
CPC分类号： B21C23/005 , B21C25/00 , B21C25/04
摘要： A die top assembly engaging with a rotating wheel (not shown) of a continuous extrusion apparatus includes a die top (22) formed with a part cylindrical face (34) co-acting with the wheel cylindrical surface and is positioned in a shoe (8) held in contact with the wheel. The die top (22), which is required to resist the very high extrusion pressure forces, is carried on a support block (30) and, at the face remote from the part cylindrical face (34), is formed with a recess (50) accommodating a die support ring (54) and spacer (52). Ports (28) registering with circumferential grooves in the rotating wheel extend from the part cylindrical face (34) to a semi-toroidal channel (44) and extrudate supply chamber (46) extending around a central boss (80). A central mandrel die piece (72) is secured in position by means of a bolt (76) threaded into a blind bore (78) in the boss (80) and co-acts with a cylindrical die (56) to form an extrusion orifice (86). By securing the die piece (72) by means of the bolt (76) threaded into the blind bore (78), the dimension radially of the die top (22) may be reduced to a minimum by virtue of avoidance of weakening penetrations other than the ports (28) in the portion of the die top (22) adjoining the rotating wheel. This has the benefit that the axial extent of the ports (28) may be reduced to a minimum, thereby reducing to a minimum the frictional losses imposed on feed material extruded through the ports, an important consideration particularly when extruding copper. A range of cylindrical dies (56) and central mandrel die pieces (72) may be utilised without having to use a different die top, thereby increasing the versatility of the apparatus without incurring large additional expenditure for a complete set of tooling.
摘要翻译：与连续挤出装置的旋转轮（未示出）接合的模具顶部组件包括模具顶部（22），模具顶部（22）形成有与轮子圆柱形表面共同作用的部分圆柱形面（34），并且定位在鞋（8 ）与车轮接触。需要抵抗非常高的挤压力的模头（22）承载在支撑块（30）上，并且在远离零件圆柱面（34）的表面上形成有凹部（50））容纳模具支撑环（54）和间隔件（52）。与旋转轮中的圆周槽对准的端口（28）从部件圆柱形表面（34）延伸到半环形通道（44）并且围绕中心凸台（80）延伸的挤出供给室（46）。中心心轴模片（72）通过拧入凸台（80）中的盲孔（78）中的螺栓（76）固定就位，并与圆柱模具（56）共同作用以形成挤压孔（86）。通过借助拧入盲孔（78）中的螺栓（76）固定模具（72），通过避免除了弱化穿透之外的模具顶部（22）的径向尺寸可以减小到最小在模具顶部（22）的与旋转轮相邻的部分中的端口（28）。这具有以下优点：端口（28）的轴向范围可以减小到最小，从而减少施加在通过端口挤出的进料上的摩擦损失，这是重要的考虑因素，特别是当挤出铜时。可以使用一系列圆柱形模具（56）和中心心轴模片（72），而不必使用不同的模具顶部，从而增加了设备的通用性，而不会对整套工具造成大量的额外费用。

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