Method and device for manufacturing bag with clamping device
A tape 3, 4 with a zipper member and a bag film 5, 6 are continuously moved by rotation of a rotary drum 32 while being overlaid with each other such that the tape 3, 4 travels in a tape introducing groove 33 for a tape with a zipper member, the groove formed along a circumferential direction of the rotary drum 32 . The tape 3, 4 with the zipper member is continuously welded to the bag film 5, 6 on a circumferential surface of the rotary drum 32 by a seal bar 35 that has a welding surface 34 in a curved shape corresponding to a circumferential surface shape of the rotary drum 32 . The whole tape 3, 4 with the zipper member is accommodated in the tape introducing groove 33 for the tape with the zipper member and a seal surface of a tape body 31, 41 is adapted to be substantially flush with the circumferential surface of the rotary drum 32 , so that heat applied from the seal bar 35 to the tape 3, 4 with the zipper member is restrained from transferring to the rotary drum 32.
1. A manufacturing device, comprising:
a rotary drum having a zipper member introducing groove formed in a circumferential direction of the rotary drum, the groove introducing and guiding a tape with a zipper member in which the zipper member is integrally formed on one surface side of a tape body of the tape; and
a seal bar disposed at a position to face the zipper member introducing groove, the seal bar having a welding surface in a curved shape corresponding to a circumferential surface shape of the rotary drum, wherein
the tape with the zipper member and the bag film are heat-sealed by the rotary drum and the seal bar while being overlaid with each other,
the zipper member introducing groove continuously extends from a tape introducing groove accommodating the tape body,
the tape introducing groove and the zipper member introducing groove forms a tape introducing groove for the tape with the zipper member,
the tape introducing groove for the tape with the zipper member has a depth in which the whole tape with the zipper member is accommodated such that a seal surface of the tape body is substantially flush with a circumferential surface of the rotary drum; and
the rotary drum has a heat-insulating portion.
2. The manufacturing device of the bag with the zipper members according to claim 1 , wherein
the heat-insulating portion is provided at least an outer circumferential portion of the rotary drum to which the tape with the zipper member abuts, the outer circumferential portion being made of a heat-insulating material.