Common problems with mold heating tubes:

Common problems with mold heating tubes:

1, Specification and model of mold heating pipe:

1. Common appearance: single ended and double ended straight heating tubes;

2. Model: RGMJ;

3. Voltage: 12V-660V;

4. Surface load: 1-8w/cm2;

5. Tube diameter: Φ 6mm- Φ 30mm;

6. Tube length: generally within 6000mm, for other purposes;

2, Common problems of mold heating pipe:

2. Surface temperature, maximum allowable working temperature:

Tube material selection:

(1) 304 stainless steel, used at temperatures below 500 degrees;

(2) 321 stainless steel, used at temperatures below 600 degrees Celsius;

(3) 310s (2520) stainless steel, used at temperatures below 800-900 degrees.

3. Calculation of power for mold heating tubes:

Surface load of aluminum castings: 1-5w/cm2, surface load of copper castings: 1-6w/cm2; Surface load of cast iron parts: 1-6w/cm2, refer to the following chart parameters:

4. Mold heating tube price:

Calculate based on size, material, and quantity.

5. Heating tube installation:

A gap of 0.05-0.1mm between the diameter of the hole and the diameter of the heating element is more suitable, because the gap is too large and becomes dry burning. The heat transfer speed of the air is much lower than that of the metal mold, and the heat dissipation of the heating tube is not timely. The surface temperature of the tube accumulates, and the internal temperature rises, making it easy to burn off the hot wire or cause tube explosion based on the principle of thermal expansion and contraction.

For example: aperture Φ 10mm, heating tube diameter ≥ Φ 9.8mm.

6. Kind reminder and precautions:

We will not introduce the commonly used voltage, wiring protection, and wiring methods one by one,

(1) Having vibration, it is best to choose nickel chromium alloy for electric heating wires;

(2) Mobile, with external wiring structures or lead protection (metal braided wire, metal hose);

(3) The heating tube can reach 3-4 degrees Celsius within a few seconds or even a few seconds, and temperature control must be done well;

(4) Should the cold end be reserved and the heating area be segmented.

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