The maximum stress, strain and temperature in aluminum material are all found to occur near the die bearing, so the severest wear happens to die near die bearing.

• 棒料进人模口至完全流出工作带这段时间是型材挤压最为困难的阶段，材料在工作带处的应力、应变最大，温度最高，因而对模具工作带处造成的磨损也最为严重。