Improvement measures when the surface of PVC injection molded parts is seriously dull

In the production process, various problems often appear. Among them, the serious problem of dull surface of PVC injection molded parts cannot be ignored.

In view of the color temperature of this type of injection molded products, commonly used methods include increasing the melt and mold temperature. Appropriately increasing the back pressure of the melt can also make the surface of the injection molded parts smooth and even reduce the degree of water trapping and gas lines..

But sometimes in production, it is often necessary to add a large amount of nozzle raw materials to the raw materials, the proportion exceeds 50%, and even full nozzle injection molding is required. Because a large number of impurities and foam in the nozzle material are heated and cut for many times during the injection molding process, the surface of the injection molded part is seriously dull.

Sometimes, due to the slope or the inclination of the injection part, a serious matte problem may also occur on the curved surface of the injection part, so the usual solutions are difficult to solve the matte problem.

In this case, if you add more color-expanding oil to the prepared highland material, you will feel greasy when you grab the highland material by hand, which can greatly improve the    colorlessness of injection molded parts, and even reduce the problem of injection molded parts. Clip water lines.

But this method is not perfect, so it can only be used as a general improvement measure, but it is still acceptable under normal circumstances.

On the contrary, if we don't want the surface of the beer part to be too bright, we can use another method to lower the gel temperature, lower the mold temperature, and increase the injection pressure. You can also use sandblasting on the mold surface.

However, although this method is effective for PVC, the effect on rubber materials is not obvious.

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