| 摘要 |
PURPOSE: A heater control device suitable for an injection molding device is provided to minimize the heat radiation of parts, thereby extending the lifetime of a triac or a thyristor which is utilized for a heater control device. CONSTITUTION: A heater control device suitable for an injection molding device comprises first and second driving units(20,30) and a control unit(10). The first driving unit controls a phase of AC(Alternating Current) power(P1) to be supplied to a heater in response to first driving control signals. The second driving unit switches the AC power to the heater in response to second driving control signals. The control unit generates the first and second driving control signals together when the set temperature of a mold is higher than measured present temperature as much as a predetermined range. [Reference numerals] (10) Control unit; (20) Main driving unit; (30) Sub driving unit; (40) Heater; (50) Temperature sensor; (AA) Power supply
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