Patent ID: 6016630
Filing Date: 2000-01-25
Classification: B21D,B60J

Abstract:
A method for forming a door frame including a first supporting portion, a second supporting portion and a decorative portion from one sheet, comprising the steps of:a first roll-forming step for bending a first portion of the sheet to form the first supporting portion by means of a roll forming machine having a series of roller stands, each of which has a pair of upper rollers and a pair of lower rollers the upper and lower rollers having fixed pieces and roller portions movable relative thereto;a second roll-forming step for bending a second portion of the sheet to form the second supporting portion by means of the roll forming machine; anda third roll-forming step for bending a third portion of the sheet to form the decorative portion by means of the roll forming machine while simultaneously forming an edge of the decorative portion by relatively moving the roller portions of the upper and lower rollers to the fixed pieces of the upper and lower rollers such that a width of the decorative portion gradually changes.