The term “fluid injection technology” (FIT) refers to injection moulding processes that involve the use of an injected medium (GIT works with nitrogen) to displace the still plasticized core of the injection moulded part. Since the 1980s, several techniques have become established, which can be grouped according to the type of melt displacement involved in the process:
- short shot process
- full shot or spill over process
- push back process
- floating core process (projectile injection technology, PIT)
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