The surface temperature of the hot runner heater is not equal to the temperature of the heated body, but it directly affects how much the heating can be achieved. The surface temperature of the hot runner heater cannot be correctly calculated by the formula and can only be estimated. Let's analyze the influencing factors and estimation methods below.
1. How high is the surface temperature of the coil heater?
1. Factors affecting the surface temperature of the hot runner coil heater:
(1) medium (heated body);
(2) tube material;
(3) Surface load design;
(4) Working environment: other factors such as airtightness, insulation, installation interval and so on.
2. Estimation of surface temperature of coil heater:
(1) Water heating, when the heating starts, the temperature difference between the water and the heating element does not exceed 55-65 ° C
When boiling, the temperature difference between the two does not exceed 5-6 °C.
(2) Dry air and see the surface load. If it is hot air circulation, look at the wind speed of the blower.
(3) Mold and mechanical equipment, allowing the surface temperature to work, see the load per square centimeter.
First, the use of mold coil heater precautions?
1. The clearance between the mounting hole and the die hole should be less than 0.05-0.1mm. For example, the die diameter is Φ16mm, and the pipe diameter should be Φ15.8-Φ15.9mm. It is not necessary to completely consider thermal expansion and contraction and subsequent replacement.
2, temperature control is a must, the mold heating tube heating rate is fast, tens of seconds or even a dozen seconds can reach 3-400 ° C high temperature;
3. Whether there is vibration, nickel-chromium alloy wire is anti-vibration, and iron-chromium-aluminum alloy wire is resistant to high temperature;
4. Is there any external force, high temperature wire or terminal, whether the lead needs high temperature resistance;
5, the spacing, the gap between the pipe and the pipe should be kept 20mm to prevent the temperature from accumulating and burning;
6. For other questions, please contact Ruigao Electric Online Customer Service or directly to inquire.