Thinning spinning, also known as powerful spinning, is developed on the basis of ordinary spinning. Its deformation characteristics are: the mandrel drives the blank to rotate, and the rotating wheel makes a feeding motion to continuously thin the blank point by point and stick it to the base. The required workpiece shape is formed by the core mold making molded-pulp (picture).
a, b-conical thinning spinning-positive spinning
c-cylindrical thinning spinning-positive aluminum cnc spinning ashtray prototype;
d-cylindrical thinning spinning-reverse spinning
1-Spinning die; 2-Rotating wheel; 3-Tail top; 4-Blank; 5-Workpiece