RF Generator for plastic tubing sealers
    3.
    发明授权
    RF Generator for plastic tubing sealers 失效
    射频发生器用于塑料管封口机

    公开(公告)号:US5543604A

    公开(公告)日:1996-08-06

    申请号:US306991

    申请日:1994-09-16

    申请人: Junius E. Taylor

    发明人: Junius E. Taylor

    摘要: Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlling the duty cycle of applied constant voltage pulses. A predetermined change of impedance of the tubing during compression and melting is detected to regulate the power applied and to ensure a weld of predetermined physical parameters. On completion of the weld, a first timer is reset and a further weld may be made. In the event of impedance mismatch, a second timer inhibits further application of power and resetting of the first timer. The use of the pulse width modulator enhances conservation of power and accommodates portability of the tubing sealer through use of rechargeable batteries as the power source.

    摘要翻译: 用于熔化,密封和焊接的塑料管的射频功率由手持或固定的基管封口器的一对手动或自动致动的导电钳口压缩,由控制施加的恒定电压脉冲的占空比的脉冲宽度调制器调节。 检测压缩和熔化期间管道阻抗的预定变化,以调节施加的功率并确保预定物理参数的焊接。 在焊接完成时,第一定时器被复位,并且可以进一步焊接。 在阻抗不匹配的情况下,第二计时器禁止进一步施加电力并重置第一定时器。 脉冲宽度调制器的使用通过使用可再充电电池作为电源来增强功率的保护并适应管道密封器的便携性。