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注塑加工的冷却时间是什么意思?

来源:http://www.schaosen.com 日期:2021-05-21 发布人:liqiang 浏览次数:
众所周知,济南注塑加工操作时一个相当复杂的过程,其间要牵扯到物理、化学等多学科的知识,因此我们在进行注塑时,一定要注意控制好各个变量,以便能更为精准的控制的效果。那么,什么是注塑加工的冷却时间呢?冷却时间即是模腔内被充满的熔融物开始冷却直到可以从模具内取出制件所需的时问,一般有如下三种定义。
As we all know, Jinan injection molding operation is a very complex process, which involves the knowledge of physics, chemistry and other disciplines. Therefore, we must pay attention to the control of various variables in order to achieve more accurate control effect. So, what is the cooling time of injection molding? Cooling time is the time required for the molten material filled in the mold cavity to cool until the part can be taken out of the mold. There are generally three definitions as follows.
济南注塑加工
Jinan injection processing
1.成型制品断面上的平均温度丁冷却到所希望的某一指定温度所需的时间。
1. The average temperature on the cross section of the molded product is the time required for cooling to a desired specified temperature.
2.结晶性制品更厚部位的温度冷却到熔点所需的时间,或者结晶度达到某一指定值所需的时间。
2. The time required for the central temperature of the thickest part of the crystalline product to cool to the melting point, or the time required for the crystallinity to reach a specified value.
3.成型制品更厚部位处的温度冷却到聚合物热变形温度所需的时间。
3. The time required for the temperature at the center of the thickest part of the molded product to cool to the thermal deformation temperature of the polymer.
注塑时,如何确定冷却时间,不仅关系到制品的质量,而且还影响产量和制品的成本。从注入模腔的塑料熔体传递出必要的热量,使其由熔体变成固体,以便从模具中取出而不变形是考虑的出发点。因此,正确地估算冷却时间也就成为了注塑加工首先应该确定的主要工艺参数。
In injection molding, how to determine the cooling time is not only related to the quality of products, but also affects the output and the cost of products. The starting point of consideration is to transfer the necessary heat from the plastic melt injected into the mold cavity, so that it can be taken out of the mold without deformation. Therefore, the correct estimation of cooling time has become the main process parameters of injection molding.

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