What Are The Causes Of Mold Heating Tube Damage?

1. Power design

The power of the ordinary mold heating tube cannot be too large, and the normal surface load cannot exceed 8w/cm². The surface load of the imported heating tube is 11-12w/cm². The larger the surface load of this standard mold heating tube, the shorter the life.

 

2. Material selection

The mold heating tube belongs to the scope, so its working environment and working temperature will choose different materials.

The working temperature is about 100-300 degrees, and the material of the heating pipe is stainless steel 304.

The working temperature is about 400-500 degrees, and stainless steel 321 is optional.

The working temperature is about 600-700 degrees, so it is necessary to choose stainless steel 310S.

Therefore, the material is not selected correctly, which is also the reason for the short life. Also whether the mold is vibrating, if it is vibrating, use nichrome wire with better flexibility.

3. Gap between mold hole

Because air has a hindering effect on heat conduction, if the heat is not emitted, it will cause the surface temperature of the heating tube to rise, causing the internal temperature of the heating tube to rise. When the internal temperature of the mold heating tube is high, it will burn The bad resistance wire shortens the life of the heating tube of the mold, and more serious tube explosion will occur, so the gap between the heating tube and the mold cannot be too large. However, the gap between them should not be too small, because the mold heating tube will expand due to the principle of thermal expansion and contraction after the power is installed. Many molds cannot be taken out when the heating tube is broken.