注塑外模具厂在注塑生产过程中常常遇到产品顶白的现象，很多注塑厂家遇上这种顶白现象时，为了赶货只好作临时的办法就是使用脱模剂。但使用脱模剂又会直接影响产品的外观，甚用多了会破产品的塑料性质从而降低产品的日后使用功效。而且使用脱模剂也增加了生产成本。所以，加工厂要产品顶白现象建议是从模具顶出结构入手。
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.
厂家要彻底产品顶白现象，必须检查在顶白的部位是否能加顶针，是否有骨位没有省光省滑，如果有骨位还存在火花纹没省干净是易造成顶白的。再有一个原因是产品某部位出模斜度不够，如果是这个原因就必须重新加工，保证有足够的出模斜度才可以切断顶白现象的，否则任你如何省光省滑或加顶针都无法彻底顶白的。
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.
塑件出现顶白现象的原因主要是制品粘模力较大,而塑件上顶出部位致顶杆顶出位置产生白痕。
山东模具制造厂家给您分析下具体的原因和改善方法，如下：
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，后模温度太低或太高：调整合适的模温。
1. The rear mold temperature is too low or too high: adjust the appropriate mold temperature.
2，顶出速度过快：减慢顶出速度。
2. Too fast ejection speed: slow down the ejection speed.
3，有脱模倒角：检修模具(抛光)。
3. With demoulding chamfer: repair the mold (polishing).
4，成品顶出不平衡（断顶针板弹簧）：检修模具（使顶出平衡）。
4. The ejection of finished products is unbalanced (the ejector pin plate spring is broken): repair the mold (make the ejection balanced).
5，顶针数量不够或位置不当：增加顶针数量或改变顶针位置。
5. Insufficient number or improper position of ejector pins: increase the number of ejector pins or change the position of ejector pins.
6，脱模时模具产生真空现象：清理顶针孔内污渍，改善进气效果。
6. Vacuum occurs in the mold during demoulding: clean the dirt in the ejector pin hole to improve the air inlet effect.
7，成品骨位、柱位粗糙（倒扣）：抛光各骨位及柱位。
7. The finished bone position and column position are rough (inverted): polish each bone position and column position.
8，注射压力或保压压力过大：适当降低其压力。
8. Excessive injection pressure or holding pressure: reduce the pressure appropriately.
9，成品后模脱模斜度过小：增大后模脱模斜度。
9. The demoulding slope of the finished product rear mold is too small: increase the demoulding slope of the rear mold.
10，侧滑块动作时间或位置不当：检修模具（使抽芯动作正常）。
10. Improper action time or position of the side slider: repair the mold (make the core pulling action normal).
11，顶针面积太小或顶出速度过快：增大顶针面积或减慢顶出速度。
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，末段的注射速度过快（毛刺）：减慢较后一段注射速度。
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!
