公开(公告)号：US3765881A

公开(公告)日：1973-10-16

申请号：US3765881D

申请日：1972-06-26

申请人： BOSCH GMBH ROBERT

发明人： SCHOLPP M

IPC分类号： C22C32/00 ,  H01R43/12 ,  B22F1/00 ,  H01R9/00

CPC分类号： C22C32/0084 ,  H01R43/12 ,  Y10T29/49119

摘要： Leaf graphite is compressed to form bodies having a gross density of at least 1.5 g/cm3. The bodies are then comminuted in a cone-mill to obtain a raw graphite powder whose particles are of essentially ball-shaped configuration and which is then screened or sifted to have a particle size distribution between 50 and 400 microns. The sifted powder is admixed with a predetermined percentage by weight of powdered copper and the mixture compressed to form a brush body, which is sintered to obtain a finished metal-carbon brush.

摘要翻译： 叶片石墨被压缩以形成总密度至少为1.5g / cm 3的物体。 然后将该物体在锥磨机中粉碎以获得其颗粒基本上为球形构型的生石墨粉末，然后将其筛分或筛分以具有50至400微米的粒度分布。 将筛分的粉末与预定重量百分比的粉末状铜混合，并将混合物压缩以形成刷体，其被烧结以获得成品金属碳刷。