| 摘要 |
PURPOSE:To reduce time required for finishing process and reduce cost by forming a back face recess by means of a grinder, after cutting an iron plate and roughly machining it into a certain shape, and manufacturing a pattern block of a metal mold fo a tire. CONSTITUTION:A wooden mold is manufactured, which is slightly larger than a directing, nearly L-shaped pattern block 10 having a required shape and size. And an iron plate is cut with tracing this wooden mold, to the same shape and size as this wooden mold using, e.g., a gas cutting device. Thus when the prototype of the pattern block 10 is manufactured, a back-burrel registering jig is manufactured to carry out back-burrel registering. Then, a back recess 10a is formed with a grinder, on the back face, which is brought in contact with a holder, of the prototype of the pattern block 10. Finally, the whole is formed into a required shape and size while being gauged, and a required pattern block 10 is obtained. |
