WJ-BS-20A Coiling Machine is an auto machine in making mattress springs. It produces biconical spring of the “Bennell” type for mattresses.It combines coiling, knotting, heating and outputting total four procedures in one machine. The speed is at 60 units one minutes. It has a nice structure which keeps a stable and safe productivity. Meanwhile, it is also very easy in adjusting. It is really the economic machine for all mattress factories.