1. #1
    Hi, just thought I'd let folks know I've got a very nice little Austin Allen pneumatic injection moulding machine listed on eBay, along with a standalone mould temperature controller (heater/chiller).

    Both run on 240V AC so possible fun for the home...?




  2. #2
    Hello Steve,

    Looks in nice nick.

    I have some questions:

    Is the machine capable of fully automated cycling?

    Is it the type of machine that injects on the split-line? This seems to make tooling easier.

    Finally, the air blast / knock off feature: Is this to stop stringing of the molten material as the barrel retracts? Or am I misunderstanding what this does?



  3. #3
    Hi, just thought I'd update this thread: The machine is now sold, thanks for the interest!

    In case anyone happens to be interested in these questions:
    The knock off feature is basically the ability to attach a small air cylinder above the mould, which pushes a wiper into the open mould to ensure the moulding falls away.
    The air blast is also an aid to ejection, such that once the mould is open, a shot of air can be directed towards the moulding to ensure it dislodges.
    These machines do also incorporate a "sprue freezing" feature, which is a directed jet of air that cools the sprue as the injection nozzle retracts from the top of the mould. This ensures the sprue breaks from the nozzle, thus preventing a situation where the ejected component is left dangling on a thread of plastic from the nozzle. Obviously that would end in tears when the mould attempted to close again...

    Regards, Steve
    Last edited by steve400; 19-04-2015 at 09:06 PM.

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