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注塑加工中收缩等注意事项说明

来源:/ 日期:2022-08-06

济南注塑加工中的收缩是注塑加工中很常见的一个问题,尤其是对表面质量要求高的塑料制品。因此,随着注塑加工技术的不断提高,大限度地减少注塑加工的收缩,提高产品质量势在必行。
Shrinkage in injection molding is a common problem in injection molding, especially for plastic products with high surface quality requirements. Therefore, with the continuous improvement of injection molding technology, it is imperative to reduce the shrinkage of injection molding and improve the product quality.
在塑料零件较厚部分(如筋或突起)形成的收缩比相邻部分更严重。这是因为较厚部分的冷却速度比周围区域慢得多。不同的冷却速度会导致结合面形成凹陷,称为缩痕。
Shrinkage formed in thicker parts of plastic parts (such as ribs or protrusions) is more severe than that in adjacent parts. This is because the cooling speed of the thicker part is much slower than that of the surrounding area. Different cooling speeds will lead to the formation of depressions on the joint surface, which is called shrinkage marks.
这种缺陷严重限制了塑料制品的设计和成型,尤其是大型厚壁制品如电视斜盒、展示盒等。实际上,家电等要求严格的产品是需要去除缩孔的,而玩具等一些表面质量要求不高的产品,在注塑加工时是允许有缩痕的。
This defect seriously limits the design and molding of plastic products, especially large thick wall products such as TV slant boxes and display boxes. In fact, household appliances and other products with strict requirements need to remove shrinkage holes, while toys and other products with low surface quality requirements are allowed to have shrinkage marks during injection molding.
济南注塑加工
形成注塑加工缩痕的原因可能有一个或多个,包括加工方法、零件几何形状、材料选择和模具设计等。几何形状和材料选择通常由原材料供应商决定,不能轻易改变。然而,在模具制造商中,有许多与模具设计相关的因素可能会影响注塑加工的收缩率。
There may be one or more reasons for forming shrinkage marks in injection molding, including processing method, part geometry, material selection and mold design. Geometry and material selection are usually determined by the raw material supplier and cannot be easily changed. However, in mold manufacturers, there are many factors related to mold design that may affect the shrinkage of injection molding.
冷却流道、浇口类型和浇口尺寸的设计可能会产生不同的效果。例如,小型浇口,如管状浇口,冷却速度比锥形浇口快得多。浇口过早冷却会减少型腔的填充时间,从而增加缩痕的可能性。
The design of cooling runner, gate type and gate size may have different effects. For example, a small gate, such as a tubular gate, cools much faster than a conical gate. Premature cooling of the gate will reduce the filling time of the cavity, thus increasing the possibility of shrinkage marks.
对于成型工人来说,调整加工条件是注塑加工中收缩问题的一种方法。填充压力和时间显着影响收缩率。
For molding workers, adjusting the processing conditions is a way to solve the shrinkage problem in injection molding. Filling pressure and time significantly affected the shrinkage.
零件填充后,多余的材料继续填充到型腔中,以补偿材料的收缩。如果填充阶段过短,收缩会加剧,终会产生更多或更大的缩痕。这种注塑加工本身收缩的方法可能无法将缩痕减少到令人满意的程度,但成型工人可以调整填充条件来改善缩痕。
After the part is filled, the excess material continues to fill into the cavity to compensate for the shrinkage of the material. If the filling stage is too short, the shrinkage will be intensified and more or larger shrinkage marks will be produced. This method of solving the shrinkage of the injection molding process itself may not reduce the shrinkage mark to a satisfactory degree, but the molding workers can adjust the filling conditions to improve the shrinkage mark.
注塑加工中收缩等注意事项说明就到这里了,您可以来我们网站咨询更多注塑加工时的操作、注意、问题等事项。
This is the end of the notes on shrinkage during injection molding. You can visit our website Consult more about the operation, attention and problems during injection molding.

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