| 摘要 |
PURPOSE:To exactly bond polyester bands without causing cutting by baking by the heater of a packing machine by a method in which the temperature of the heater is temporarily raised to a temperature higher than an optimal temperature during a heater insertion process. CONSTITUTION:A heater 1 is energized to an optimal temperature for the hot- bonding of a synthetic resin requiring high temperatures (where a switch 1 is in the position of the one-dot chain line and primary side coil 2 of a transformer 5 is in a largely turned state), and during a heater insertion process, the switch 7 is switched to the position of full line at an optimal time before and after the heater 1 enters between bands and the number of turns of the primary side coil 2 of the transformer 5 becomes less, whereby the temperature of the heater 1 becomes higher than the optimal temperature and bands in contact are securely bonded with each other. Afterwards, the switch 7 is switched to the one-dot chain line and the optimal temperature for hot bonding is restored for the next hot bonding process. |
