Braitheann foirmiú rolla ar cheann rollta chun fórsa a fheidhmiú. Dá bhrí sin, is saincheist thábhachtach maidir le foirmiú rollta é an dearadh ceann rollta oiriúnach nó nach ea. Ceanglais ghinearálta maidir le cinn rollta:
①It can form the required shape and size of the product, and it is not easy to produce defects.
② During rolling, it is conducive to the extension of mud and the discharge of residual mud.
③Long service life and proper surface hardness and finish.
④Manufacturing, maintenance, adjustment, assembly and disassembly are convenient.
⑤The source of the roller head material is easy and the price is cheap.
