... It is with High frequency heating to bend the plywood, MDF sheet, HDF sheet to chair, sofa arm, musicial instrument as ... There are mainly two type of press, with lateral pressure and one directionpressure, with the tonnage of the press range from 80T ... : Plywood, MDF, HDF bending: office chair, sofa, bed elements, musical instrument and others2). HIGH FREQUENCY FRAME ASSEMBLY MACHINE (FOR 90 DEGREE ...