目前铝和铝合金管常采用在型孔挤压模中的热挤压工艺来进行工业化生产。型孔挤压模是一种较为复杂的模具,共包括三个不同部分:模具跨桥、模具外壁和连接在模具跨桥上的芯棒。在型孔挤庄模中,所挤压的金属被模具跨桥分割成不同的金属流。这些金属流通过模具通道流到熔合腔,在熔合 At present, aluminum and aluminum alloy pipe is often used in the extrusion die extrusion die for industrial production. Hole-die extrusion die is a more complex mold, including a total of three different parts: mold across the bridge, the mold wall and connected to the mold across the bridge mandrel. In the hole-extrusion die, the extruded metal is split into different metal flows across the bridge. These metal flows through the mold channels to the fusion chamber, where they fuse