For some transparent steel wire hoses with a diameter of more than 80 mm, we need to take another measurement method, which needs to be emphasized here. When testing its tightness, we can first install a sealing plug made of transparent material on one end of the hose, or a transparent sealing plate, and the other end can be connected to a vacuum pump with a vacuum gauge. Reduce the internal pressure of the hose to the experimental pressure value within seconds and keep it for at least 10 minutes. During this process, we can use some light sources that meet a certain brightness to check the internal conditions of the hose through a transparent plate, and check Is there any phenomenon of injection depression or shriveling on the outside of the hose?
Analysis of the causes of wrinkling on the surface of PVC steel wire hose
PVC steel wire hoses sometimes wrinkle in the production process, mainly for the following reasons
1. Uneven temperature of the die Uneven temperature will cause uneven heating of the raw materials. Check the heating ring to ensure that it is evenly nested in the die.
2. The cooling effect is not good. The hose is not fully cooled after production. It is necessary to reduce the temperature of the cooling water to completely cool it.
Third, the traction speed is not suitable The traction speed is fast or slow, which will affect the smoothness of the surface, and the traction speed should be adjusted.
4. Impurities in the materials Impurities in the production raw materials will cause defects on the surface of the hose, resulting in wrinkles, and the raw materials should be replaced.
5. Low temperature of the fuselage and components If the temperature is too low, the production process cannot meet the requirements, which will affect the processing quality. It is necessary to increase the temperature of the fuselage and components.
