Hidden wire slot wholesale, more importantly, in the design of extruded profiles, should try to avoid extruded profiles with extra thick local. The influence of metallurgical quality of materials on die life can not be ignored, especially for high carbon and high alloy steel, metallurgy is often the root cause of quenching cracking and initial failure of extruded profiles. Therefore, improving the metallurgical quality of materials is also an important aspect to improve the life of extruded profiles. Adopting new heat treatment process and exploiting the potential of existing materials is effective to improve the life of die, but it is also limited.

There are black lines in the plastic hose, which are caused by high temperature. The small gate and ventilation of the mold can also produce this phenomenon. Two solid plastic hose with holes, and blackening phenomenon. Solid plastic hose molding, injection pressure is low, injection speed is slow, otherwise, air under high pressure through friction charred is wrapped in the plastic hose, so that there is a black gap between the products.

How to operate the bubble in the hidden wire slot? Because of the different thickness produced by the hidden wire slot, the thick part often forms bubbles, and the joint is also easy to form bubbles. The first cooling of the groove in the mold is the surface part, and the core is usually cooled especially slowly. When the core part is cooled, it will shrink, but because the surface of the groove has been cooled, it can only shrink by itself and form bubbles.

The cooling time is too short (especially the thick wall PVC card slot, the best means of disposal is external cold water and cold pressing die for cooling. There are black lines in the card slot, which are caused by high temperature. If the feeding amount is too much or too little and the injection tension is too high, such a situation must occur. If the feeding amount is properly adjusted, such a situation may be improved.