TPE弹性体吹塑成型工艺有哪些

2025-04-01 00:28:51
推荐回答(1个)
回答1:

1、注射吹塑成型工艺

注射吹塑成型工艺过程是将注射机注射模内的熔融塑料形成管状型坯,开模后将管坯留在芯锁上,趁热关闭吹塑模,再从芯锁内设置的气道中引入 0.2~0.7MPa 的压缩空气,将型坯吹胀成模腔的形状,最后在保压条件下冷却脱模即可得到制品。

2、挤出吹塑成型工艺

挤出吹塑成型的工艺过程是将挤出机挤出的管状型坯,趁热将型坯夹入吹塑模中,再从吹塑模的气道中向型坯内通入 0.20~0.69MPa 的压缩空气,使管坯吹胀到模腔形状,最后在保压条件下冷却脱模后即可得到制品。

3、拉伸吹塑成型工艺

拉伸吹塑成型工艺包括:注射型坯定向拉伸吹塑和挤出型坯定向拉伸吹塑。注射型坯定向拉伸吹塑的工艺过程是:先注射有底型坯,再将其加热到适宜的拉伸温度,放入吹塑模内借助拉伸棒进行轴向拉伸,拉伸倍率为
1~2 倍,同时,引入压缩空气吹胀已经轴向拉伸的型坯,冷却脱模后得到制品。

4、多层吹塑成型工艺

多层吹塑成型是在注射吹塑和挤出吹塑的基础上发展起来的工艺方法,只是其制品的壁由单层变为多层而已。

5、大型吹塑成型工艺

大型吹塑成型工艺的技术关键主要是:高速形成型坯和控制壁厚均匀度,减少容器的变形。这就要求型坯的温度控制要均匀,模具设计必须有利于脱模。

6、工艺控制因素

影响吹塑成型和制品质量的工艺因素主要有:型坯温度、模具温度、冷却时间、鼓气速率、吹塑空气压力和吹胀比等。

常见的吹塑材料以PP,PE,PPO为主。软性TPE材料的吹塑,对于胶料的熔体强度要求较高,不是随便一款TPE牌号都可以吹塑成型的。

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