公开(公告)号：US4428218A

公开(公告)日：1984-01-31

申请号：US324543

申请日：1981-11-24

申请人： Joseph M. LaRocca

发明人： Joseph M. LaRocca

IPC分类号： B21C23/14 ,  B21C37/04 ,  E06B9/165

CPC分类号： B21C37/045 ,  B21C23/14 ,  B21C23/145 ,  E06B9/165 ,  E06B2009/1572

摘要： In a method for extruding an aluminum slat for a roller shutter with an undercut slot extending along one edge of the slat and formed by spaced apart front and rear members extending from the body of the slat, breakage of the part of the extrusion die which forms the slot is prevented by forming the slot in two steps. In the first step, the slat is extruded through a die which forms the front member in a position angled outwardly, so that the portion of the extruding die corresponding to the opening of the undercut slot can be made thick enough to withstand the extruding pressure without breaking. The front member is then bent back by a rolling operation to its desired position relative to the rear member.

摘要翻译： 在用于挤压用于具有沿着板条的一个边缘延伸的底切槽的卷帘的铝板条的方法中，并且由从板条主体延伸的间隔开的前部和后部部件形成，形成的挤出模具的部分的断裂 通过在两个步骤中形成槽来防止槽。 在第一步中，板条通过模具挤出，该模具在向外成角度的位置形成前部构件，使得对应于底切槽的开口的挤压模具的部分可以制成足够厚以承受挤出压力而没有 打破 然后，前部构件通过滚动操作向后弯曲到相对于后部构件的期望位置。