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      1. 歡迎訪問濟南立強模具有限公司!



        來源:http://www.lasagnafarm.com/ 日期:2022-06-14

        Injection mold factories often encounter the phenomenon of product top white in the injection production process. When many injection mold manufacturers encounter this phenomenon, they have to make a temporary solution in order to catch up with the goods is to use release agent. However, the use of release agent will directly affect the appearance of the product, and even more use will damage the plastic properties of the product, thus reducing the future use efficiency of the product. And the use of release agent also increases the production cost. Therefore, the suggestion for the processing plant to solve the product top white phenomenon is to start with the mold ejection structure.
        In order to completely solve the problem of product top whiteness, the manufacturer must check whether a thimble can be added at the top whiteness part, whether there is a bone position that does not save light and slip, and if there is a bone position that still has spark lines, it is easy to cause top whiteness. Another reason is that a certain part of the product has insufficient mold inclination. If this is the reason, it must be reprocessed to ensure that there is enough mold inclination before the top white phenomenon can be cut off. Otherwise, no matter how you save light and slip or add a thimble, the top white problem can not be completely solved.
        The main reason for the top white phenomenon of plastic parts is that the product has a large mold adhesion force, and the top part of the plastic parts causes white marks on the top position of the ejector rod. The Shandong mold manufacturer will analyze the specific causes and improvement methods for you, as follows:
        1. The rear mold temperature is too low or too high: adjust the appropriate mold temperature.
        2. Too fast ejection speed: slow down the ejection speed.
        3. With demoulding chamfer: repair the mold (polishing).
        4. The ejection of finished products is unbalanced (the ejector pin plate spring is broken): repair the mold (make the ejection balanced).
        5. Insufficient number or improper position of ejector pins: increase the number of ejector pins or change the position of ejector pins.
        6. Vacuum occurs in the mold during demoulding: clean the dirt in the ejector pin hole to improve the air inlet effect.
        7. The finished bone position and column position are rough (inverted): polish each bone position and column position.
        8. Excessive injection pressure or holding pressure: reduce the pressure appropriately.
        9. The demoulding slope of the finished product rear mold is too small: increase the demoulding slope of the rear mold.
        10. Improper action time or position of the side slider: repair the mold (make the core pulling action normal).
        11. The ejector pin area is too small or the ejection speed is too fast: increase the ejector pin area or slow down the ejection speed.
        12. The injection speed of the last section is too fast (Burr): it slows down the injection speed of the later section.
        These are the reasons and solutions for the top white of injection molding products. If you want to learn more, please follow our website www.sdlqmj COM, let you return with a full load!

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