How to drill the most suitable hole for installing a single head electric heating tube?

How to drill the most suitable hole for installing a single head electric heating tube?

I have encountered a customer before who ordered a batch of single head electric heating tubes and found that they could not fit into the installation hole or were either very tight or loose after installation. Friends who are familiar with single headed electric heating tubes should know that this is actually due to the unclear relationship between the diameter and aperture of the single headed electric heating tube. So how to drill the most suitable hole for installing a single head electric heating tube?

We know that air hinders heat conduction, so the gap between the wall of a single headed electric heating tube and the hole wall of the mold cannot be too large. If it is too large, the temperature of the electric heating tube cannot be transmitted in time, and the surface temperature of the electric heating tube will rise, and the internal temperature of the electric heating tube will also rise accordingly. When the internal temperature of the electric heating tube reaches a certain level, the resistance wire will be burned out, and at this point, the electric heating tube will be burned out.

At the same time, the gap between the wall of the single head electric heating tube and the hole wall of the mold cannot be too small, because the diameter of the electric heating tube will become thicker due to thermal expansion and contraction after being heated by electricity. When the electric heating tube breaks down and needs to be replaced, it won't be able to be pulled out.

Therefore, the difference between the diameter of a single head electric heating tube and the installation aperture should be within a certain range. Based on years of production experience at Yancheng Huahe, their value between 0.1-0.2mm is the most suitable.

Such a value can ensure that the heat of the electric heating tube is transmitted to the mold in a timely manner, and can also facilitate the smooth removal of the electric heating tube after expansion caused by electric heating. Therefore, before customizing a single head electric heating tube, it is necessary to confirm the diameter of the tube. Then confirm the installation aperture of the single head electric heating pipe based on the pipe diameter. Similarly, if the hole has already been drilled, the diameter of the single head electric heating tube should be confirmed based on the aperture.

Through the above introduction, we have learned that installing a single head electric heating tube with a diameter 0.1-0.2mm larger than the pipe diameter is the most suitable. For friends who are not familiar with the relationship between the aperture and diameter of a single head electric heating tube, it can be used as a reference.

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