Abstract: Disclosure is a pocket flange forming device for a duct. When a plate enters a forming molding unit provided at the opposite sides of the forming device while being seated on a transfer unit, pocket flanges serving as duct connecting portion are formed on longitudinal edges on the opposite sides of the plate through the forming-molding method such as bending, folding, and compressing in addition to transferring, and the forming molding unit is rotated by 180 degrees to match with molding positions of forming rollers of the left and right forming molding unit, and a gap between the forming molding unit and another forming molding unit is set by a gap adjusting part, so that the pocket flanges having the same size or different sizes at the opposite sides thereof can be molded at the same time. Accordingly, the production performance and productivity of the pocket flanges can be enhanced.

Abstract: The present invention relates to an apparatus for manufacturing a metal plate for a duct. The apparatus includes a frame (F) constituted by connecting metal pieces in a form of a box; roll stands (F2) vertically installed on a top surface of the frame (F); upper and lower bead processing rolls (2 and 4) provided at both ends thereof with shafts (S1 and S2) and formed on outer surfaces thereof with embossments and intaglios; a feeding part (100) including idle rollers (110) to stably feed metal plates from a rear of the upper and lower bead processing rolls (2 and 4); first and second gears (S1-1 and S2-2) coupled to the shafts (S1 and S2) of the upper and lower bead processing rolls (2 and 4); a pulley (76) coupled to the second gear (S2-2); and a driving unit (7) including a driving motor (72).

Abstract: Provided is a manufacturing method of a spiral duct including an elbow. The manufacturing method includes: bending projecting wave portions of metal plate members upward by a ball caster, the metal plate members being cut in such a manner that a straight lines and waves are formed; transferring the metal plate members using a pair of transfer rollers which are rotated by a first motor installed in a manufacturing apparatus of a spiral duct including an elbow; pressing a single folded portion and a double folded portion of the metal plate members using upper and lower pressing rollers while the transferred metal plate members are rolled into a circular shape by a joint jig; and cutting the elbow formed by the manufacturing apparatus using upper and lower cutters. According to the invention, an elbow curved at a gentle angle can be formed, and the projecting wave portions of the metal plate members are bent so as to form the elbow. Therefore, a fluid can smoothly flow along the curved portion of the elbow.

Abstract: Provided is a joint jig of a spiral duct manufacturing apparatus including an uncoiler around which a metal plate member is wound; a wave bending device which cuts the metal plate member supplied from the uncoiler into a straight line and waves and forms a single folded portion and a double folded portion at both edges of the cut metal plate member; a ball caster which bends the projecting wave portions of the metal plate member supplied from the wave bending device upward; a pair of transfer rollers which transfer the metal plate member supplied through the ball caster; upper and lower pressing rollers which are installed adjacent to each other in the vertical direction and press the single folded portion and the double folded portion of the metal plate member; and upper and lower cutters which cut a spiral duct pressed by the upper and lower pressing rollers.

Abstract: The present invention relates to an apparatus for manufacturing a metal plate for a duct. The apparatus includes a frame (F) constituted by connecting metal pieces in a form of a box; roll stands (F2) vertically installed on a top surface of the frame (F); upper and lower bead processing rolls (2 and 4) provided at both ends thereof with shafts (S1 and S2) and formed on outer surfaces thereof with embossments and intaglios; a feeding part (100) including idle rollers (110) to stably feed metal plates from a rear of the upper and lower bead processing rolls (2 and 4); first and second gears (S1-1 and S2-2) coupled to the shafts (S1 and S2) of the upper and lower bead processing rolls (2 and 4); a pulley (76) coupled to the second gear (S2-2); and a driving unit (7) including a driving motor (72).

Abstract: Provided is a manufacturing method of a spiral duct including an elbow. The manufacturing method includes: bending projecting wave portions of metal plate members upward by a ball caster, the metal plate members being cut in such a manner that a straight lines and waves are formed; transferring the metal plate members using a pair of transfer rollers which are rotated by a first motor installed in a manufacturing apparatus of a spiral duct including an elbow; pressing a single folded portion and a double folded portion of the metal plate members using upper and lower pressing rollers while the transferred metal plate members are rolled into a circular shape by a joint jig; and cutting the elbow formed by the manufacturing apparatus using upper and lower cutters. According to the invention, an elbow curved at a gentle angle can be formed, and the projecting wave portions of the metal plate members are bent so as to form the elbow. Therefore, a fluid can smoothly flow along the curved portion of the elbow.