Controlled by PID micro computer, accurate temperature control. Pump overload protection to ensure service life effectively. Alarm device for low liquid level to guarantee system running safety. Switch of main power source conforms to CE safety standard. Alarm device for Phase reverse to guarantee system running safety. The device is equipped with multi-fault indicator to facilitate the customer knowing the reason and solving in time. The heating barrel is made from the stainless steel and cleaned easily. Air blowing can be selected for the mould to ensure temporarily clean placing and prolong the service life.