| 摘要 |
A ball press contains a tapered screw with helical grooves of curvilinear profile fixed against axial displacement, which is made with possibility of rotation around its longitudinal axis, a fixed bushing with smooth internal surface, which encloses the screw and has slots for discharge of the product of squeezing, and bypass for balls. The tapered screw is made with small apex angle of its external conical surface, but not less than one-and-a-half degree. The corresponding surface of bushing, which encloses tapered screw, is equidistant to the external conical surface of this screw and has longitudinal groove for balls. |
